CN104541432B - Power system for a vehicle - Google Patents
Power system for a vehicle Download PDFInfo
- Publication number
- CN104541432B CN104541432B CN201380041653.8A CN201380041653A CN104541432B CN 104541432 B CN104541432 B CN 104541432B CN 201380041653 A CN201380041653 A CN 201380041653A CN 104541432 B CN104541432 B CN 104541432B
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- Prior art keywords
- lower limit
- engine
- battery
- speed
- vehicle
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
- H02J7/1446—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle in response to parameters of a vehicle
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/40—The network being an on-board power network, i.e. within a vehicle
- H02J2310/46—The network being an on-board power network, i.e. within a vehicle for ICE-powered road vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Control Of Charge By Means Of Generators (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
A power system for a vehicle is provided, in which idle reduction control is performed, under which an engine is automatically stopped when a predetermined automatic stop condition is met, and automatically restarted when a predetermined restart condition is met in a state where the engine is automatically stopped. The power system includes a generator which is driven on the basis of output of the engine, a battery which is connected to the generator, and a controller which allows the generator to generate power when an amount of charge of the battery has decreased below a lower limit, and which sets the lower limit to a higher level when the speed of the vehicle has exceeded a predetermined speed than in a case where a speed of the vehicle has not exceeded the predetermined speed.
Description
Technical field
The present invention relates to a kind of power system for vehicle, the power system includes electromotor and battery.
Background technology
The known power system in vehicle is by using two batteries (i.e. lead battery and lithium ion battery)
To configure.By being suitably used these batteries, the various electric loadings in vehicle are supplied power to.Such as patent text
The concrete configuration that JP-A-2012-080706 discloses such power system is offered, wherein, lithium ion battery is opened via quasiconductor
It is powered-down to be connected to electromotor and lead battery.
Configuration disclosed in JP-A-2012-080706 realizes idle running and reduces control (idle reduce
control).Reduce under control in idle running, automatically stop engine when predetermined automatic stop condition is met, and ought draw at this
Hold up make a reservation for engine automatically be restarted when restarting condition.
Usually, when the quantity of electric charge of lead battery is reduced to below lower limit or lower limit, electrical power generators are with to lead electric power storage
Charge in pond.Thus, if in the state of engine is automatically stopped the quantity of electric charge of lead battery be reduced to lower limit or lower limit with
Under, then engine is restarted for the purpose charged to lead battery.In this case, shorten continuing for engine halted state
Time, thus can not effectively carry out idle running and reduce control.
The content of the invention
Embodiment provides a kind of power system for vehicle, and the power system can effectively carry out idle running and reduce control
System.
As the one side of embodiment, there is provided a kind of power system for vehicle, sky is carried out in the power system
Turn to reduce control, reduce under control in idle running, automatically stop engine when predetermined automatic stop condition is met, and when drawing
Hold up, automatically restart engine.The power system includes：Generate electricity
Machine, output of the electromotor based on engine are driven；Battery, the battery are connected to electromotor；And controller, the controller makes
Electromotor generates electricity when the quantity of electric charge of battery is reduced to below lower limit, and the controller by the speed in vehicle exceed make a reservation for
Lower limit set during speed into the speed than vehicle not less than predetermined speed in the case of lower limit for height.
Description of the drawings
In the accompanying drawings：
Fig. 1 shows the schematic diagram of the power system according to first embodiment；
Fig. 2 shows upper for the state of charge PbSOC of the lead battery of some conditions according to first embodiment
The table of limit and lower limit；
The flow chart that Fig. 3 shows the process that control is kept according to the quantity of electric charge of first embodiment；
Fig. 4 shows the sequential chart of the car speed of the upper and lower bound relative to PbSOC according to first embodiment；
Fig. 5 is showed according to second embodiment for the table of the upper and lower bound of the PbSOC of some conditions；
The flow chart that Fig. 6 shows the process that control is kept according to the quantity of electric charge of second embodiment；
Fig. 7 shows the sequential chart of the car speed of the upper and lower bound relative to PbSOC according to second embodiment；
Fig. 8 shows the sequential chart of the car speed of the upper and lower bound relative to PbSOC according to modified example；
Fig. 9 shows the sequential chart of the car speed of the upper and lower bound relative to PbSOC according to another modified example；
Figure 10 shows the sequential of the car speed of the upper and lower bound relative to PbSOC according to another variation example
Figure；And
Figure 11 shows the schematic diagram of the modified example of power system.
Specific embodiment
Hereinafter with reference to Description of Drawings some embodiments of the present invention.
(first embodiment)
The first embodiment of the power system for vehicle of the present invention is described referring to figs. 1 to Fig. 4.The electric power of the present embodiment
System is mounted in the in-car power system used in vehicle.Vehicle is travelled as driving source using engine (internal combustion engine).
When starting engine, drive trigger motor to cause engine initial rotation.
Fig. 1 shows the schematic diagram of the power system according to first embodiment.As shown in fig. 1, power system includes：
Alternating current generator 10, lead battery 20, lithium ion battery 30, electric loading 41,42 and 43, MOS switch 50 and SMR switches 60.
Lead battery 20, lithium ion battery 30 and electric loading 41,42 and 43 are via power feeder 15 (connection cable) and alternating current generator
10 (electromotors) electrical connection in parallel.Power feeder 15 forms feed path so that electric power is fed to respectively from alternating current generator 10
Individual electric part.
Lead battery 20 (battery, the first battery) is known universal battery.Lithium ion battery 30 (the second battery) and lead
It is the electricity of the high density with energy-efficient, high power density and high-energy-density in terms of charge/discharge that accumulator 20 is compared
Pond.The set of cells that lithium ion battery 30 is connected by multiple battery cells in series is configuring.The charging capacity of lead battery 20 is set
Determine into bigger than the charging capacity of lithium ion battery 30.
MOS switch 50 (connecting valve) is partly led by what MOSFET (mos field effect transistor) was configured
Body is switched.MOS switch 50 is arranged at the position between alternating current generator 10 and lithium ion battery 30.The position also corresponds to lead
Position between accumulator 20 and lithium ion battery 30.MOS switch 50 act as following switches：The switch is by lithium ion battery 30
Connect (connection) to alternating current generator 10 and lead battery 20, and by lithium ion battery 30 from alternating current generator 10 and lead electric power storage
Pond 20 disconnects (turn off).
ON/OFF MOS switch 50 is come by ECU (electronic control unit) 70.Specifically, opened switching MOS by ECU 70
Close 50 conducting state (connection status) and off state (off-state).ECU 70 is configured to include CPU and memorizer
The known microcomputer of (ROM and RAM).
Similar to MOS switch 50, it is the semiconductor switch configured by MOSFET that SMR switchs 60 (cell switch).In electric power
In feeder line 15, SMR switches 60 are arranged at the position between coupling part and lithium ion battery 30, and the coupling part is connected to
Between MOS switch 50 and electric loading 43.SMR switches 60 act as following switches：Lithium ion battery 30 is connected to MOS by the switch
Switch 50 and electric loading 43, and lithium ion battery 30 is disconnected from MOS switch 50 and electric loading 43.
Switched the conducting state (connection status) and off state (off-state) of SMR switches 60 by ECU 70.Promptly
During situation, SMR switches 60 also act as opening/closing apparatus.Generally, the continuous output according to the Continuity signal from ECU 70, SMR
Switch 60 keeps in the conduction state.During emergency, stop output Continuity signal so that SMR switches 60 enter off state.
Off state is entered by making SMR switches 60, it is to avoid the overcharge or overdischarge to lithium ion battery 30.SMR switches 60 can be with
Configured by open type electromagnetic relay.In this case, even if ECU70 breaks down and can not control SMR switches 60,
SMR switches 60 are also automatically opened to set up disconnection.
Lithium ion battery 30, switch 50 and 60 and ECU 70 are contained in in integrated housing (storage case) to match somebody with somebody
Put battery component U.Lithium ion battery 30 is provided with current sensor, voltage sensor and temperature sensor.Current sensor is surveyed
Amount flows out or flows into the electric current of lithium ion battery 30.The terminal voltage of voltage sensor senses lithium ion battery 30.Temperature sensor
The temperature of detection lithium ion battery 30.Based on the output of these sensors, the output current of ECU70 detection lithium ion batteries 30,
Output voltage and temperature.
ECU 70 is connected to the ECU outside battery component U (electronic control unit) 80.ECU 80 and detection car speed
Vehicle speed sensor 91 connects.ECU 70 and 80 via the communication network of such as CAN (controller local area network) be connected to each other with
Realize intercommunication.Therefore, the various data being stored in ECU 70 and 80 can be shared between these ECU.ECU
80 (controllers) are configured to the known microcomputer for including CPU and memorizer (ROM and RAM).
In electric loading 41,42 and 43, electric loading 43 is set up in 30 side of lithium ion battery relative to MOS switch 50 and is electrically connected
Connect.Electric loading 43 is the electric loading of requirement constant pressure, and which requires that the voltage of the electric power of supply is stable, that is to say, that supply
The change in voltage of the electric power of the voltage substantially constant or supply of electric power falls in preset range.To the supply of electric power of electric loading 43
Mainly it is responsible for by lithium ion battery 30.
The specific example of electric loading 43 includes navigation system and audio system.For example, if supply electric power voltage not
It is constant and be changed significantly, or be changed significantly so as to exceed preset range, then some may be caused to bother.For example, voltage may
Instantaneously it is reduced to below minimum operation voltage and resets the operation of such as navigation system.It is therefore desirable to supply to electric loading
43 electrical power stabilization is in the specified level that voltage will not be made to be reduced to below minimum operation voltage.
In electric loading 41,42 and 43, electric loading 41 and 42 is set up in 20 side of lead battery relative to MOS switch 50 and is electrically connected
Connect.Electric loading 41 is the trigger motor for starting engine, and electric loading 42 be except electric loading 43 (requiring the electric loading of constant pressure) and
Conventional electric loading beyond trigger 41.The specific example of electric loading 42 includes：Headlight, for the rain of such as front windshield
The heater of brush, the fan for air-conditioner and the frost removal for rear seat windscreen.Electric loading 42 includes driving load,
The driving load drives power steering gear or motorized window when its predetermined drive condition meets.To trigger 41 and electric loading 42
Supply of electric power be mainly responsible for by lead battery 20.
Alternating current generator 10 is generated electricity using the rotating energy of the bent axle (output shaft) of engine.Although omission illustrates known
Configuration of alternating current generator 10 etc., but which is briefly described.When the rotor by bent axle rotary AC electromotor 10, encourage
Magnetoelectricity stream can induce AC electric currents by rotor coil in the stator coils in response to this.Then AC electric currents are turned by commutator
Change DC electric current into.The exciting current by rotor coil is adjusted by the actuator of alternating current generator 10, so as to given birth to adjust
Into DC electric current voltage cause its be setting voltage Vreg.The operation of actuator is controlled by ECU 80.
The electric power that alternating current generator 10 is generated is provided to electric loading 41,42 and 43, while being also supplied to lead battery
20 and lithium ion battery 30.When the driving stopping to engine and when alternating current generator 10 does not generate electricity, electric power is from lead battery 20
Supply to electric loading 41,42 and 43 with lithium ion battery 30.
Additionally, in the present embodiment, deceleration regeneration is carried out, the wherein regeneration energy of vehicle is used to make alternating current generator 10
Electricity is so as to the charging of both batteries 20 and 30.Deceleration regeneration is carried out when some conditions meet, some conditions include：Vehicle is in
Deceleration, the fuel to engine inject cut-off etc..
Battery 20 and 30 is connected in parallel.Therefore, when being charged to battery with alternating current generator 10, if at MOS switch 50
In conducting state, then the electric current for being encouraged of alternating current generator 10 flows into its terminal voltage less than in the battery of another battery.It is another
Aspect, when (electric discharge) electric power is supplied to electric loading 42 and 43, if MOS switch 50 is on shape in the non-power generating time period
State, then from its terminal voltage higher than another battery battery discharge to electric loading.
When refresh charging is carried out, it is ensured that the terminal voltage of lithium ion battery 30 have more be reduced to lead battery 20
Chance below terminal voltage so that lithium ion battery 30 has precedence over lead battery 20 and is electrically charged.Can be by determining 20 He of battery
30 open-circuit voltage and internal resistance are realizing such setting.Can pass through to select the positive electrode active materials of lithium ion battery 30, bear
Pole active material and electrolyte are determining open-circuit voltage.
In the vehicle of the present embodiment, idle running reduction control is carried out, is reduced under control in idle running, stopped when satisfaction is predetermined automatically
Only automatically stop engine during condition, and when in the state of automatically being stopped in engine, satisfaction makes a reservation for restart condition, from
Engine is restarted dynamicly.When under idle running reduction control, engine is automatically stopped, ECU 70 turns off (disconnect) MOS switch 50.
Additionally, when engine is restarted, lead battery 20 from lithium ion battery 30 it is electrically disconnected in the state of, ECU 70 is turned off (disconnect)
MOS switch 50 so that trigger (electric loading 41) is driven by lead battery 20.
When vehicle in addition to the time period of refresh charging time period travel when, ECU 70 shut-off MOS switch 50 and
Connect SMR switches 60.Alternating current generator 10 and lead battery 20 are electrically disconnected from electric loading 43, while lithium ion battery 30 is electrically connected
To electric loading 43.Therefore, lithium ion battery 30 individually supplies electric power to electric loading 43.So as to during regenerative electric power, it is ensured that
The terminal voltage of lithium ion battery 30 has the chance being more reduced to below the terminal voltage of lead battery 20 so that can be positive
Ground is by the power charge for being generated to lithium ion battery 30.Compared with lead battery 20, lithium ion battery 30 has higher energy
Amount efficiency, so as to enhance the charge/discharge efficiency of whole power system.
Lead battery 20 is provided with current sensor and voltage sensor.Current sensor detection is flowed out or flows into lead electric power storage
The electric current in pond 20.The terminal voltage of voltage sensor senses lead battery 20.The detected value obtained from these sensors is transferred into
ECU 80 (cell system control unit).As described above, ECU 70 is based on the sensor in lithium ion battery 30
Output detecting the output current and output voltage of lithium ion battery 30.The various data of ECU 70 and 80 these ECU it
Between shared.
ECU 80 calculates lead electric power storage based on the detected value obtained from above mentioned current sensor and voltage sensor
SOC (the state of charge of each in pond 20 and lithium ion battery 30：The actual quantity of electric charge is relative to full of the quantity of electric charge in electricity condition
Percentage ratio (%)).ECU 80 controls the generating of alternating current generator 10 so that every in lead battery 20 and lithium ion battery 30
Individual SOC will fall in proper range (so that battery is not overcharged or overdischarge).Specifically, by ECU 80 adjusting setting
Voltage Vreg, while the operation of MOS switch 50 is controlled by ECU 70.Hereinafter, the SOC of lead battery 20 is referred to as
PbSOC, and the SOC of lithium ion battery 30 is referred to as into LiSOC.The proper range of LiSOC is of about 35% to 80%, and PbSOC
Proper range be of about 88% to 92%.In the present embodiment, as shown in Figure 2, subtly set according to some conditions
The proper range (lower limit is to the upper limit) of PbSOC.
As shown in Figure 2, when car speed exceedes predetermined speed (condition 1), the lower limit D1 of PbSOC is set as
89.8% and upper limit U1 is set as into 90.2%.When car speed is not less than predetermined speed (condition 2), by under PbSOC
Limit D2 is set as 89.2% and upper limit U2 is set as 89.6%.In other words, when car speed exceedes predetermined speed, will
The lower limit set of PbSOC into than car speed not less than predetermined speed in the case of it is high.Additionally, by the lower limit of the PbSOC of condition 1
D1 is set to that upper limit U2 of the PbSOC than condition 2 is high.By the range set between the lower limit D1 and upper limit U1 of the PbSOC of condition 1
It is equal into the scope between the lower limit D2 and upper limit U2 with the PbSOC of condition 2.For example, predetermined speed can be 50km/h, that is, use
Or in other words in it is determined that vehicle is likely to the speed for keeping traveling, the speed little for determining the probability that engine is automatically stopped
Degree.
No matter whether condition 1 or condition 2 meet, (the condition when the electric current discharged from lead battery 20 exceedes scheduled current
3) the lower limit D3 of PbSOC is set as into 90.5%, while upper limit U3 is set as 91.0%.Additionally, by the PbSOC's of condition 3
Lower limit D3 is set to that upper limit U2 of the PbSOC of upper limit U1 than the PbSOC of condition 1 or condition 2 is high.In other words, when from lead electric power storage
When the electric current of the electric discharge of pond 20 exceedes scheduled current, the lower limit set of PbSOC is not surpassed into the electric current than discharging from lead battery 20
Cross height in the case of scheduled current.By the range set between the lower limit D3 and upper limit U3 of the PbSOC of condition 3 into more than discontented
Scope between the lower limit and the upper limit of the PbSOC in the case of sufficient condition 3.Additionally, by the lower limit D3 of the PbSOC of condition 3 with it is upper
Range set between limit U3 is into the scope between the lower limit D1 (D2) and upper limit U1 (U2) of the PbSOC of greater than condition 1 (2).In advance
Determine electric current to be set to reduce electric current faster for the quantity of electric charge for determining lead battery 20.
With reference to Fig. 3, it is described below for based on the upper and lower bound of PbSOC to keep the quantity of electric charge of lead battery 20
Control process (quantity of electric charge keep control).The process includes the series of steps repeated with predetermined period by ECU 80.
First, it is determined that whether exceeding scheduled current (step S11) from the electric current of the electric discharge of lead battery 20.Specifically, ECU
80 detected values obtained based on the current sensor from lead battery 20, it is determined that in the state of alternating current generator 10 does not generate electricity from
Whether the electric current of the electric discharge of lead battery 20 exceedes scheduled current.If it is determined that exceeding predetermined electricity from the electric current of the electric discharge of lead battery 20
Stream (being yes in step S11), then the upper and lower bound of PbSOC is set as upper limit U3 and lower limit D3 of condition 3.
On the other hand, if it is determined that from lead battery 20 electric discharge electric current not less than scheduled current (being no in step S11),
Then determine whether car speed exceedes predetermined speed (step S13).Specifically, ECU 80 is based on from vehicle speed sensor 91
To detected value whether exceed predetermined speed determining car speed.Predetermined speed is set to into (the place when car speed increases
In accelerating) than (in the slow down) height when car speed reduces, so as to suppressing delayed.
If it is determined that car speed exceedes predetermined speed (being yes at step S13), it is determined that exceed in car speed predetermined
After speed, whether time period T2 expires (step S14).Time period T2 (second time period) is set to can determine vehicle speed
Spend the little value of the probability being again reduced to below predetermined speed.If it is determined that car speed exceed predetermined speed after the time
Section T2 expires (step S14 is yes), then the upper and lower bound of PbSOC is set to upper limit U1 and lower limit D1 (steps of condition 1
S15).Specifically, in the case where car speed exceedes predetermined speed, if the time after car speed exceedes predetermined speed
Section T2 expire, then by the lower limit set of PbSOC into than in car speed not less than predetermined speed in the case of it is high.
On the other hand, in step S14, if it is determined that after car speed exceedes predetermined speed, time period T2 is not expired
(being no in step S14), then remain current set value by the upper and lower bound of PbSOC.It should be understood that in this series step
Suddenly, before starting, the upper and lower bound of PbSOC is initially set to into upper limit U1 and lower limit D1 of condition 1.
If it is determined that car speed is not less than predetermined speed (being no in step S13), it is determined that be reduced in car speed
After below predetermined speed, whether time period T3 expires (step S16).Being set to can be true for time period T3 (the 3rd time period)
Car speed is determined again above the little value of the probability of predetermined speed.If it is determined that being reduced to below predetermined speed in car speed
Time period T3 expires (being yes in step S16) afterwards, then the upper and lower bound of PbSOC is set as upper limit U2 of condition 2 with
Limit D2 (step S17).Specifically, in the case where car speed is not less than predetermined speed, if be reduced in car speed pre-
After below constant speed degree, time period T3 expires, then by the lower limit set of PbSOC into the feelings than exceeding predetermined speed in car speed
It is low under condition.
Then, the upper and lower bound of PbSOC is being set to the value (step S12, S15 or S17) of one of condition 1,2 and 3
Afterwards, ECU 80 controls the generating of alternating current generator 10 based on set upper and lower bound so that PbSOC falls in appropriate model
In enclosing.Specifically, ECU 80 causes alternating current generator 10 to generate electricity when the quantity of electric charge of lead battery 20 is reduced to below lower limit, but
It is the generating for stopping alternating current generator 10 when the quantity of electric charge of lead battery 20 increases to more than the upper limit.Afterwards, terminate the process
Series of steps (end).
With reference to Fig. 4, the effect that the quantity of electric charge shown in Fig. 3 keeps control is described below.Fig. 4 is showed relatively
In the sequential chart of the car speed of the upper and lower bound of PbSOC.In the diagram, with the hacures between the upper limit and lower limit of PbSOC
To illustrate the proper range of PbSOC.
As shown in Figure 4, in the state of being higher than initially predetermined speed in car speed (in accelerating), by the upper of PbSOC
Limit upper limit U1 and lower limit D1 into condition 1 with lower limit set.Pre- constant speed is reduced to when car speed reduction and at moment t11
When degree is following (in deceleration), will the upper and lower bound of PbSOC remain upper limit U1 and lower limit D1.Then, when in vehicle speed
Degree be reduced to below predetermined speed after (in slow down) time period T3 (from the beginning of moment t11) when moment t12 places expire, by
The upper and lower bound of PbSOC is set to upper limit U2 of condition 2 and lower limit D2.By this way, it is likely to again in car speed
More than (in accelerating) during predetermined speed, the upper and lower bound of PbSOC is remained into upper limit U1 and lower limit D1 of condition 1.Then,
Become to be likely in engine, at the time point that automatically stopped, the upper and lower bound of PbSOC to be set to upper limit U2 of condition 2
With lower limit D2.
Afterwards, even if increasing and when moment t13 places are more than predetermined speed (in acceleration) in car speed, will
The upper and lower bound of PbSOC remains upper limit U2 of condition 2 and lower limit D2.Then, when car speed exceed predetermined speed it
(in accelerate) time period T2 (from the beginning of moment t13) is when moment t14 places expire afterwards, by the upper and lower bound setting of PbSOC
Into upper limit U1 and lower limit D1 of condition 1.By this way, when car speed is likely to be again reduced to below predetermined speed
The upper and lower bound of PbSOC is remained upper limit U2 and lower limit D2 of condition 2 by (in slowing down).Then, become in car speed
It is likely to keep, at the time point of traveling, the upper and lower bound of PbSOC being set to upper limit U1 and lower limit D1 of condition 1.
Embodiments detailed above has advantages below.
When car speed exceed predetermined speed when (condition 1), by the lower limit set of PbSOC into than car speed not less than pre-
In the case of constant speed degree, (condition 2) is high.Therefore, when car speed exceedes predetermined speed and vehicle is likely to keep traveling,
Guarantee with car speed not less than predetermined speed in the case of compared with, lead battery 20 have more quantities of electric charge.Conversely, working as
Car speed becomes ratio in the quantity of electric charge of lead battery 20 not less than predetermined speed and when engine is likely to automatically be stopped
The generating of alternating current generator 10 is not carried out before the quantity of electric charge in the case where car speed exceedes predetermined speed is low.So as to, when
When vehicle is likely to keep traveling, it is ensured that the quantity of electric charge is larger, but when engine is likely to automatically be stopped, it is allowed to more
Electric discharge.Therefore, it can effectively carry out idle running reduction control.
When car speed exceedes predetermined speed (condition 1) but after car speed exceedes predetermined speed (in accelerating)
When time period T2 is not expired, forbid by the lower limit set of PbSOC into than in car speed not less than predetermined speed in the case of (bar
Part is 2) high.Therefore, after predetermined speed is exceeded in car speed, (in accelerate) time period T2 is not expired and car speed
When being likely to be again reduced to below predetermined speed (in slowing down), suppress the generating of alternating current generator 10.Then, when vehicle speed
Degree (is in and accelerates) more than predetermined speed and after car speed exceedes predetermined speed time period T2 (second time period) phases
Man Shi, by the lower limit set of PbSOC into higher than under condition 2.So as to when vehicle is likely to keep traveling, it is ensured that lead electric power storage
Pond 20 has the higher quantity of electric charge.Therefore, it can be more effectively carried out idle running reduction control.
When car speed is not less than predetermined speed (condition 2) but it is reduced to below predetermined speed in car speed and (is in
Slow down) after time period T3 it is not expired when, forbid by the lower limit set of PbSOC into than car speed exceed predetermined speed feelings
Under condition, (condition 1) is low.Therefore, after car speed is reduced to below predetermined speed, (in slowing down) time period T3 is not expired simultaneously
And car speed is likely to again above (in accelerating) during predetermined speed, it is ensured that lead battery 20 has the higher quantity of electric charge.
Then, when car speed is not less than predetermined speed but (is in and slows down) time period after car speed is reduced to predetermined speed
When T3 expires, by the lower limit set of PbSOC into lower than under condition 1.So as to, when engine is likely to automatically be stopped, can
To suppress the generating of alternating current generator 10.Therefore, it can be more effectively carried out idle running reduction control.
(the condition when alternating current generator 10 is generated electricity and exceedes scheduled current from the electric current of the electric discharge of lead battery 20
3), by the lower limit D3 of PbSOC be set to than in the electric current discharged from lead battery 20 not less than scheduled current in the case of it is high.From
And, when the quantity of electric charge of lead battery 20 is reduced rapidly, it is ensured that lead battery 20 has the higher quantity of electric charge.
When the electric current discharged from lead battery 20 exceedes scheduled current (condition 3), the lower limit D3 of PbSOC is set to into ratio
In the case where car speed exceedes predetermined speed, the lower limit D1 of the PbSOC of (condition 1) is high.So as to when the electricity of lead battery 20
When lotus amount is promptly reduced, it is ensured that the quantity of electric charge is likely to the quantity of electric charge in the case that holding is travelled more than in vehicle.Therefore, when drawing
Hold up when being likely to automatically be stopped, the generating of alternating current generator 10 can be suppressed.Therefore, it can be more effectively carried out idle running subtract
It is few to control.
When the electric current discharged from lead battery 20 exceedes scheduled current (condition 3), by between lower limit D3 and upper limit U3
Range set into than in the electric current discharged from lead battery 20 not less than between the lower limit and the upper limit in the case of scheduled current
Scope is big.So as to when the quantity of electric charge of lead battery 20 is promptly reduced and is reduced to below lower limit D3, it is ensured that the quantity of electric charge
Incrementss are larger.So as to prevent the quantity of electric charge of lead battery 20 to be reduced to below lower limit D3 immediately again.
Predetermined speed is set in the case of car speed increase (in accelerating) and (is in than reducing in car speed
Slow down) in the case of it is high.So as to even if can also prevent the upper and lower bound of PbSOC from continually being changed in changes in vehicle speed
Become.
Power system includes lithium ion battery 30, and the lithium ion battery 30 is connected to alternating current generator 10 and lead battery
20.Therefore, electric current is discharged to lithium ion battery 30 from lead battery 20 so that PbSOC is easily reduced to below lower limit.From
And, the big quantity of electric charge is guaranteed when vehicle is likely to keep traveling, but when engine is likely to automatically be stopped, suppressing to hand over
The generating of stream electromotor 10.In this way it is possible to use such configuration to obtain very big advantage.
(second embodiment)
Referring now to Fig. 5 to Fig. 7, the second embodiment of the present invention is described below.In a second embodiment, in Fig. 3
Shown in the quantity of electric charge keep control to be changed to the quantity of electric charge shown in Fig. 6 keeping control.It is real that remaining is configured similarly to first
Apply example.It should be understood that in the modified example for describing in a second embodiment and thereafter, in order to omit unnecessary saying
It is bright, to first embodiment in the part of control process or the part or step of the same or similar control process of step be given
Identical reference.
Fig. 5 is showed according to second embodiment for the table of the upper and lower bound of the PbSOC of some conditions.Such as Fig. 5
Shown in, in a second embodiment, the proper range of PbSOC is subtly set according to some conditions.As shown in Figure 5, drawing
In the state of holding up at work (condition 4), the upper and lower bound of PbSOC is set to into the upper and lower bound with the PbSOC of condition 1
Similar upper limit U1 and lower limit D1.In the state of engine is automatically stopped (condition 5), the upper and lower bound of PbSOC is set
Determine into upper limit U2 similar with the upper and lower bound of the PbSOC of condition 2 and lower limit D2.Specifically, automatically stopped in engine
In the state of, by the lower limit set of PbSOC into than engine at work in the state of it is low.
No matter whether condition 4 or 5 meets, when the electric current discharged from lead battery 20 exceedes scheduled current (condition 3), will
The upper and lower bound of PbSOC is set to upper limit U3 similar with the upper and lower bound of the PbSOC of condition recited above 3 and lower limit
D3.Relation between upper limit U1 and lower limit D1, upper limit U2 and lower limit D2 and upper limit U3 and lower limit D3 respectively with first embodiment
In relation it is identical.
With reference to the flow chart shown in Fig. 6, it is described below for based on the upper and lower bound of PbSOC to keep lead to store
The control process (quantity of electric charge keeps control) of the quantity of electric charge of battery 20.The process includes being repeated with predetermined period by ECU 80
Series of steps.
First, in step s 11, if it is determined that the electric current from the electric discharge of lead battery 20 is not less than scheduled current (step S11
In be no), it is determined that (step S23) at work whether engine.If it is determined that engine is at work (being yes in step S23),
Then determine whether time period T1 (first time period) expires (step S24) after engine is automatically restarted.Time period T1 (the
One time period) it is configured to can determine that vehicle is likely to be kept for the time period of traveling.
In step s 24, if it is determined that expire (being yes in step S24) from time started section T1 of restarting automatically of engine,
The upper and lower bound of PbSOC is then set to upper limit U1 and lower limit D1 (step S25) of condition 4.Specifically, in engine in work
In in the state of, if from engine restart automatically time started section T1 expire, by the lower limit set of PbSOC into than in engine quilt
It is high in the state of automatically stopping.
On the other hand, not expired (step S24 of time started section T1 is restarted if determined from automatic engine in step s 24
In be no), then the upper and lower bound of PbSOC is remained into current set value.It should be understood that starting it in the series of steps
Before, the upper and lower bound of PbSOC is initially set to into upper limit U1 and lower limit D1 of condition 4.
If determining engine not at work in step S23, i.e. engine (step in the state of automatically being stopped
It is no in S23), then the upper and lower bound of PbSOC is set to upper limit U2 and lower limit D2 (step S26) of condition 5.
The upper and lower bound of PbSOC is set to any PbSOC once of condition 3,4 and 5 the upper limit and under
After limit (step S12, S25 and S26), ECU 80 controls sending out for alternating current generator 10 based on set upper and lower bound
Electricity so that PbSOC falls in proper range.Specifically, ECU 80 causes alternating current generator 10 in the quantity of electric charge of lead battery 20
Generate electricity when being reduced to below lower limit, but stop alternating current generator 10 when the quantity of electric charge of lead battery 20 rises to more than the upper limit
Generating.Afterwards, terminate the series of steps (end) of the process.
With reference to Fig. 7, the effect of the quantity of electric charge control shown in Fig. 6 is described below.Fig. 7 show relative to
The sequential chart of the car speed of the upper and lower bound of PbSOC.
As shown in Figure 7, engine initially at work in the state of, the upper and lower bound of PbSOC is set to into bar
Upper limit U1 and lower limit D1 of part 4.When car speed reduces and engine is automatically stopped at the moment t21, by PbSOC's
Upper and lower bound is set to upper limit U2 of condition 5 and lower limit D2.Therefore, expiring from time started section T1 of restarting automatically of engine
Before, the generating of alternating current generator 10 is not carried out till PbSOC is further reduced.
Afterwards, though when engine is automatically restarted at moment t22, will the upper and lower bound of PbSOC remain
Upper limit U2 and lower limit D2 of condition 5.Then, when from engine restart automatically time started section T1 at moment t23 expire when, will
The upper and lower bound of PbSOC is set to upper limit U1 of condition 4 and lower limit D1.By this way, it is likely to again by certainly in engine
When stopping dynamicly, the upper and lower bound of PbSOC is remained into upper limit U2 and lower limit D2 of condition 5.Then, become very may be used in vehicle
Can keep at the time point of traveling, the upper and lower bound of PbSOC is set to into upper limit U1 and lower limit D1 of condition 4.
The second embodiment of specific descriptions has the advantages that as described below.Eliminate similar with the advantage in first embodiment
Advantage.
In the state of engine is automatically stopped (condition 5), by the lower limit set of PbSOC into than engine at work
Under state, (condition 4) is low.Therefore, from engine restart automatically time started section T1 expire before, do not carry out alternating current generator
10 generating until the quantity of electric charge of lead battery 20 become than engine at work in the state of it is low till.So as in engine
In the state of actually automatically being stopped, more electric discharges can be allowed.Therefore, it can be more effectively carried out idle running reduction control
System.
When engine is at work but time period T1 is not expired after the restarting automatically of engine, forbid PbSOC's
Lower limit set (condition 5) in the state of than automatically being stopped in engine is high.Therefore, when from engine when restarting beginning automatically
Between when section T1 is not expired and engine is likely to automatically be stopped again, it is allowed to it is more to discharge.When engine (bar at work
Part 4) and from engine when restarting automatically time started section T1 and expiring, by the lower limit set of PbSOC into higher than under condition 5.
So as to when vehicle is likely to keep traveling, it is ensured that battery has more quantities of electric charge.Therefore, it can be more effectively carried out sky
Turn to reduce control.
The lower limit D3 of the PbSOC of (condition 3) in the case of scheduled current is exceeded in the electric current discharged from lead battery 20
Be set to than engine at work in the state of (condition 4) PbSOC lower limit D1 it is high.Therefore, when the electricity of lead battery 20
When lotus amount is promptly reduced, it is ensured that than engine at work in the state of more quantities of electric charge, but when engine be likely to by from
When stopping dynamicly, suppress the generating of alternating current generator 10.Therefore, it can be more effectively carried out idle running reduction control.
It should be understood that the present invention is not limited to arrangements discussed above, and it is believed that those skilled in the art
Any and whole modification, modification or the equivalent that can be made is fallen in the scope of the present invention.
(modified example)
For example, embodiment described above can be modified as described below.
In the first embodiment, in the case of scheduled current being exceeded in the electric current discharged from lead battery 20 (condition 3)
PbSOC lower limit D3 be set to than car speed exceed predetermined speed in the case of (condition 1) PbSOC lower limit D1
It is high.As the replacement to this, the lower limit D3 of the PbSOC under condition 3 can be set to the lower limit D1 phases with the PbSOC of condition 1
Deng.Alternatively, it is possible to the lower limit D3 of the PbSOC of condition 3 being set to, the lower limit D1 of the PbSOC than condition 1 is low.
In a second embodiment, in the case of scheduled current being exceeded in the electric current discharged from lead battery 20 (condition 3)
PbSOC lower limit D3 be set to than engine at work in the state of (condition 4) PbSOC lower limit D1 it is high.As to this
Replacement, the lower limit D3 of the PbSOC of condition 3 can be set to equal with the lower limit D1 of the PbSOC of condition 4.Alternatively, may be used
It is low with the lower limit D1 that the lower limit D3 of the PbSOC of condition 3 is set to the PbSOC than condition 4.
Replacement of the lower limit that the lower limit D2 of PbSOC than condition 2 can be used bigger as the lower limit of PbSOC.
In the first embodiment, when car speed increases (in accelerating), predetermined speed is set to than in vehicle speed
In the case that degree reduces, (in slowing down) is high.As the replacement to this, predetermined speed can be set in acceleration and place
It is identical in both slowing down.
In this case, as shown in Figure 8, in the state of car speed is initially higher than predetermined speed, by PbSOC's
Upper and lower bound is set to upper limit U1 of condition 1 and lower limit D1.Even if when at moment t31, car speed is reduced to predetermined speed
When following, will the upper and lower bound of PbSOC remain upper limit U1 and lower limit D1.Then, it is predetermined when being reduced in car speed
After below speed, the upper and lower bound of PbSOC is set to upper limit U2 of condition 2 when moment t32 places are expired by time period T3
With lower limit D2.Therefore, when car speed is likely to again above predetermined speed, the upper and lower bound of PbSOC is maintained into bar
Upper limit U1 and lower limit D1 of part 1.Then, become to be likely in engine at the time point that automatically stopped, by the upper limit of PbSOC
With lower limit set into condition 2 upper limit U2 and lower limit D2.
Afterwards, though car speed increase so as to moment t33 at more than predetermined speed when, will PbSOC the upper limit
Upper limit U2 and lower limit D2 of condition 2 are remained with lower limit.Then, time started section T2 when predetermined speed is exceeded from car speed
When expiring at the moment t34, the upper and lower bound of PbSOC is set to into upper limit U1 and lower limit D1 of condition 1.Therefore, in vehicle
When speed is likely to be again reduced to below predetermined speed, by the upper and lower bound of PbSOC remain condition 2 upper limit U2 and under
Limit D2.Then, become to be likely at the time point of holding traveling in car speed, the upper and lower bound of PbSOC is set to into bar
Upper limit U1 and lower limit D1 of part 1.
According to the configuration, it is not necessary to which the predetermined speed in accelerating is changed when in deceleration, or need not
Predetermined speed in slowing down is changed when in acceleration, so as to simplify the process carried out by ECU 80.And,
In this case, after car speed is reduced to below predetermined speed, time period T3 expires or exceedes in car speed predetermined
Under conditions of time period T2 expires after speed, change the upper and lower bound of PbSOC.So as to the change of car speed is hardly
Cause the frequent change of the upper and lower bound of PbSOC.
Furthermore, it is possible to need not meet time period T3 or T2 expire condition in the case of change PbSOC the upper limit and
Lower limit.In this case, as shown in figure 9, in car speed initially higher than in the state of predetermined speed, by the upper limit of PbSOC
With lower limit set into condition 1 upper limit U1 and lower limit D1.When car speed reduces so as to be reduced to predetermined speed at moment t41
When following, the upper and lower bound of PbSOC is set to into upper limit U2 and lower limit D2 of condition 2.Afterwards, when car speed increase so as to
When at moment t42 more than predetermined speed, the upper and lower bound of PbSOC is set to into upper limit U1 and lower limit D1 of condition 1.And
And, in this case, when vehicle is likely to keep traveling, it is ensured that lead battery 20 has the higher quantity of electric charge, and
When engine is likely to automatically be stopped, it is suppressed that the generating of alternating current generator 10 (electromotor).
In a second embodiment, when engine at work and from engine to restart automatically time started section T1 not expired
When, forbid the lower limit set of PbSOC that (condition 5) is high in the state of automatically being stopped than engine.As the replacement to this,
The upper and lower bound of PbSOC can be changed in the case where the condition that time period T1 expires need not be met.
In this case, as shown in Figure 10, engine initially at work in the state of, by the upper limit of PbSOC
With lower limit set into condition 4 upper limit U1 and lower limit D1.When car speed reduce and at the moment t51 engine is automatically stopped
When only, the upper and lower bound of PbSOC is set to into upper limit U2 and lower limit D2 of condition 5.Afterwards, when the engine quilt at moment t52
When automatically restarting, the upper and lower bound of PbSOC is set to into upper limit U1 and lower limit D1 of condition 4.And, in such case
Under, in the state of engine is actually automatically stopped, the generating of alternating current generator 10 can be suppressed.
In embodiment described above, make the PbSOC of upper and lower bound and the condition 4 of the PbSOC of condition 1 the upper limit and
Lower limit is equal.Used as the replacement to this, upper limit U1 and lower limit D1 of the PbSOC of condition 1 can be with the upper limits of the PbSOC of condition 4
U4 is different with lower limit D4.Additionally, in the above embodiments, making the PbSOC of the upper and lower bound and condition 5 of the PbSOC of condition 2
Upper and lower bound it is equal.Used as the replacement to this, upper limit U2 and lower limit D2 of the PbSOC of condition 2 can be with conditions 5
Upper limit U5 of PbSOC is different with lower limit D5.
First embodiment and second embodiment can be combined.Specifically, can perform including the step shown in Fig. 3
The process of rapid S13 to S18 and both process of S23 to S26 the step of including shown in Fig. 6.Especially, become in car speed
The vehicle for automatically stopping engine before zero can obtain first embodiment and the advantage both second embodiment.
In the first embodiment and the second embodiment, power system includes lead battery 20 and lithium ion battery 30.As
Replacement to this, as shown in Figure 11, it is possible to use not including the power system of lithium ion battery 30.And, using the configuration,
Alternating current generator 10 can be allowed to be generated electricity when the quantity of electric charge of lead battery 20 is reduced to below lower limit.Additionally, matching somebody with somebody at this
In putting, when car speed exceed predetermined speed when, can by the lower limit set of PbSOC into than in car speed not less than pre- constant speed
It is high in the case of degree.Additionally, in the state of engine is automatically stopped, can be by the lower limit set of PbSOC into existing than engine
It is low in the state of in work.Therefore, it can effectively carry out idle running reduction control.
Hereinafter, to embodiment described above in terms of summarize.
As the one side of embodiment, there is provided a kind of power system for vehicle, sky is carried out in the power system
Turn to reduce control, reduce under control in idle running, automatically stop engine when predetermined automatic stop condition is met, and when drawing
Hold up, automatically restart the engine.The power system includes：Send out
Motor (10), output of the electromotor (10) based on engine are driven；Battery (20), the battery (20) are connected to electromotor
(10)；And controller (80), the controller (80) cause electromotor generate electricity when the quantity of electric charge of battery is reduced to below lower limit,
And the lower limit set when speed in vehicle to exceed the controller predetermined speed into than the speed in vehicle not less than predetermined
Lower limit for height in the case of speed.
According to the configuration, automatically stop engine when predetermined automatic stop condition is met, and when automatic in engine
When satisfaction makes a reservation for restart condition in the state of ground stopping, engine is automatically restarted.Additionally, when the quantity of electric charge of battery is reduced to lower limit
When following, electromotor is generated electricity based on the output of engine, so as to the battery to being connected to electromotor charges.So as to when in engine
When in the state of automatically being stopped, the quantity of electric charge of battery is reduced to below lower limit, restart engine to drive electromotor.
When car speed exceed predetermined speed when, by the lower limit set of the quantity of electric charge into than in car speed not less than pre- constant speed
It is high in the case of degree.Therefore, when car speed exceedes predetermined speed and vehicle is likely to keep traveling, it is ensured that battery has
Have than in car speed not less than predetermined speed in the case of the higher quantity of electric charge.On the other hand, when car speed is not less than pre-
Constant speed degree and when engine is likely to automatically be stopped, getting lower than in the quantity of electric charge of battery and exceedes pre- constant speed in car speed
Before the quantity of electric charge of the battery in the case of degree, alternating current generator does not generate electricity.So as to when vehicle is likely to keep traveling, really
The higher quantity of electric charge has been protected, and when engine is likely to automatically be stopped, it is suppressed that the generating of electromotor.Therefore, it can to have
Idle running is carried out effect reduce control.
As the another aspect of embodiment, there is provided a kind of power system for vehicle, carry out in the power system
Idle running reduction control, is reduced under control in idle running, is automatically stopped engine when predetermined automatic stop condition is met, and is worked as
Engine meets predetermined when restarting condition in the state of automatically being stopped, automatically restarting engine.The power system includes：Generate electricity
Machine (10), output of the electromotor (10) based on engine are driven；Battery (20), the battery (20) are connected to electromotor (10)；
And controller (80), the controller (80) cause electromotor generate electricity when the quantity of electric charge of battery is reduced to below lower limit, and
In the state of engine is automatically stopped, the controller by lower limit set into than engine at work in the state of it is low.
According to the configuration, in the state of engine is automatically stopped, by the lower limit set of the quantity of electric charge into than existing in engine
It is low in the state of in work.So as to, in the state of engine is automatically stopped, getting lower than in engine in the quantity of electric charge of battery
Before the quantity of electric charge of the battery in the state of at work, electromotor is not generated electricity.Therefore, in engine actually by automatically
In the state of stopping, it is suppressed that the generating of electromotor.Therefore, it can effectively carry out idle running reduction control.
Claims (15)
1. a kind of power system for vehicle, carries out idle running in the power system and reduces control, reduces in the idle running
Under control, automatically stop engine when predetermined automatic stop condition is met, and work as what is automatically stopped in the engine
When satisfaction makes a reservation for restart condition under state, the engine is automatically restarted, it is characterised in that the power system includes：
Electromotor, output of the electromotor based on the engine are driven；
Battery, the battery are connected to the electromotor；And
Controller, the controller cause the electromotor to generate electricity when the quantity of electric charge of the battery is reduced to below lower limit, and
And the controller by the speed in the vehicle exceed predetermined speed when the lower limit set into the speed than the vehicle
Lower limit for height in the case of not less than the predetermined speed.
2. power system according to claim 1, wherein,
In the state of the engine is automatically stopped, the controller by the lower limit set into than in the engine in work
It is low in the state of in work.
3. power system according to claim 2, wherein,
The engine at work in the state of, if after the engine is to automatically restart first time period expire, institute
State controller the lower limit set is high in the state of than being automatically stopped in the engine.
4. power system according to claim 1, wherein,
The vehicle speed exceed the predetermined speed when, if the vehicle speed exceed the predetermined speed it
Afterwards second time period expire, then the controller by the lower limit set into the speed than the vehicle not less than the pre- constant speed
It is high in the case of degree.
5. power system according to claim 1, wherein,
When the speed of the vehicle is not less than the predetermined speed, if the speed in the vehicle is reduced to the pre- constant speed
After below degree, the 3rd time period expired, then the lower limit set is exceeded institute into than the speed in the vehicle by the controller
State low in the case of predetermined speed.
6. power system according to claim 1, wherein,
When the electromotor is generated electricity and exceedes scheduled current from the electric current of the battery discharge, the controller will
The lower limit set into than in the electric current from the battery discharge not less than the scheduled current in the case of it is high.
7. power system according to claim 6, wherein,
The lower limit set when the electric current from the battery discharge exceedes the scheduled current is configured to than in institute
The speed for stating vehicle exceedes the described lower limit for height set during the predetermined speed.
8. power system according to claim 6, wherein,
The controller causes the electromotor to generate electricity when the quantity of electric charge of the battery is reduced to below lower limit, but described
Stop the generating of the electromotor when quantity of electric charge of battery rises to more than the upper limit, and
When the electric current from the battery discharge exceedes the scheduled current, the scope between the lower limit and the upper limit
Be configured to than in the electric current from the battery discharge not less than the scheduled current in the case of the lower limit and institute
The scope stated between the upper limit is big.
9. power system according to claim 1, wherein,
The predetermined speed is configured to high when the speed of the vehicle reduces in the speed increase when ratio of the vehicle.
10. power system according to claim 1, wherein,
The battery is used as the first battery, and
The power system also includes the second battery for being connected to the electromotor and first battery.
A kind of 11. power systems for vehicle, carry out idle running in the power system and reduce control, reduce in the idle running
Under control, automatically stop engine when predetermined automatic stop condition is met, and work as what is be automatically stopped in the engine
When satisfaction makes a reservation for restart condition under state, the engine is automatically restarted, it is characterised in that the power system includes：
Electromotor, output of the electromotor based on the engine are driven；
Battery, the battery are connected to the electromotor；And
Controller, the controller cause the electromotor to generate electricity when the quantity of electric charge of the battery is reduced to below lower limit, and
And in the state of the engine is automatically stopped, the controller is by the lower limit set into than the engine at work
In the state of it is low.
12. power systems according to claim 11, wherein,
The engine at work in the state of, if after the engine is to automatically restart first time period expire, institute
State controller the lower limit set is high in the state of than being automatically stopped in the engine.
13. power systems according to claim 11, wherein,
When the electromotor is generated electricity and exceedes scheduled current from the electric current of the battery discharge, the controller will
The lower limit set into than in the electric current from the battery discharge not less than the scheduled current in the case of it is high.
14. power systems according to claim 13, wherein,
The lower limit set when exceeding the scheduled current from the electric current of the battery discharge is configured to than described
Engine at work in the state of the described lower limit for height that sets.
15. power systems according to claim 13, wherein,
The controller causes the electromotor to generate electricity when the quantity of electric charge of the battery is reduced to below the lower limit, but
The quantity of electric charge of the battery stops the generating of the electromotor when rising to more than the upper limit, and
When the electric current from the battery discharge exceedes the scheduled current, the scope between the lower limit and the upper limit
Be configured to than in the electric current from the battery discharge not less than the scheduled current in the case of the lower limit and institute
The scope stated between the upper limit is big.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012174781A JP5965775B2 (en) | 2012-08-07 | 2012-08-07 | Vehicle power system |
| JP2012-174781 | 2012-08-07 | ||
| PCT/JP2013/071896 WO2014025064A1 (en) | 2012-08-07 | 2013-08-07 | Power system for a vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104541432A CN104541432A (en) | 2015-04-22 |
| CN104541432B true CN104541432B (en) | 2017-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201380041653.8A Active CN104541432B (en) | 2012-08-07 | 2013-08-07 | Power system for a vehicle |
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| Country | Link |
|---|---|
| JP (1) | JP5965775B2 (en) |
| CN (1) | CN104541432B (en) |
| DE (1) | DE112013003970T5 (en) |
| IN (1) | IN2015DN00144A (en) |
| WO (1) | WO2014025064A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9628011B2 (en) * | 2015-02-05 | 2017-04-18 | Ford Global Technologies, Llc | Engine speed control via alternator load shedding |
| JP6575402B2 (en) * | 2016-03-08 | 2019-09-18 | 株式会社オートネットワーク技術研究所 | In-vehicle power supply charge rate monitoring device and in-vehicle power supply system |
| JP6696401B2 (en) * | 2016-10-21 | 2020-05-20 | 株式会社デンソー | Power supply |
| JP6593363B2 (en) * | 2017-01-31 | 2019-10-23 | トヨタ自動車株式会社 | Power system |
| JP2018182888A (en) * | 2017-04-12 | 2018-11-15 | 矢崎総業株式会社 | Power supply system |
| CN109630288B (en) * | 2018-11-23 | 2022-04-22 | 浙江吉利新能源商用车集团有限公司 | Power generation method, device and system of dual-fuel engine vehicle |
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| JP3880924B2 (en) * | 2002-12-18 | 2007-02-14 | 松下電器産業株式会社 | Power supply control device and control method thereof |
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2012
- 2012-08-07 JP JP2012174781A patent/JP5965775B2/en active Active
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- 2013-08-07 CN CN201380041653.8A patent/CN104541432B/en active Active
- 2013-08-07 IN IN144DEN2015 patent/IN2015DN00144A/en unknown
- 2013-08-07 DE DE112013003970.2T patent/DE112013003970T5/en active Pending
- 2013-08-07 WO PCT/JP2013/071896 patent/WO2014025064A1/en active Application Filing
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| CN101267971A (en) * | 2005-11-07 | 2008-09-17 | 丰田自动车株式会社 | Hybrid vehicle and control method thereof |
| CN101852160A (en) * | 2009-01-21 | 2010-10-06 | 株式会社电装 | Be used for the system that restarts internal-combustion engine when motor restarts condition satisfying |
| CN102427980A (en) * | 2009-04-27 | 2012-04-25 | 丰田自动车株式会社 | Hybrid car, and method for controlling the same |
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Also Published As
| Publication number | Publication date |
|---|---|
| DE112013003970T5 (en) | 2015-08-13 |
| JP2014036458A (en) | 2014-02-24 |
| WO2014025064A1 (en) | 2014-02-13 |
| JP5965775B2 (en) | 2016-08-10 |
| IN2015DN00144A (en) | 2015-06-12 |
| CN104541432A (en) | 2015-04-22 |
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