JP3622501B2 - Control device for hybrid vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To start an engine without utilizing special equipment such as an emergency motor, immediately perform traveling, and shorten the time up to starting of the engine when the storage quantity of electricity of a battery is lowered to such an extent that a generator-motor cannot be driven. SOLUTION: A battery 3 is charged by a generator-motor(GM) 11 driven by an engine 1. When the engine 1 is started, cranking of the engine 1 is performed by the GM 11 receiving electric power from the battery 3. When the storage quantity of electricity of the battery 3 is lowered to such an extent that the GM 11 cannot be driven, traveling is performed by a motor 2 receiving electric power from the battery 3, and drive wheels 9 and the engine 1 are mechanically connected in timing of braking to crank the engine with rotational energy from the drive wheels 9. When kinetic energy of a traveling vehicle is large, regeneration by the motor 2 is selected to directly supply regenerative energy to the GM 11 for cranking the engine.

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a control device for a hybrid vehicle.
[0002]
[Prior art]
Hybrid vehicles that run in combination with an engine that generates (generates) driving force by burning fuel and a motor that generates (generating) driving force by receiving power supplied from a battery have already been put into practical use. . The amount of power stored in the battery has a great influence on traveling, and Japanese Patent Application Laid-Open No. 9-98502 proposes a display that displays the distance that can be traveled from the current amount of stored battery power. Japanese Patent Laid-Open No. 9-233607 discloses a device that prohibits the automatic transmission from running in the power mode when the amount of charge of the battery is reduced.
[0003]
In a hybrid vehicle, a generator (generator) driven by an engine is provided in order to charge a battery, which is a voltage source of a motor, using the engine. On the other hand, in a hybrid vehicle, the engine is frequently operated and stopped, that is, the engine is frequently started. In order to start the engine in a very short time, the generator generates a large driving force. Therefore, the generator driven by the engine is a large generator / motor.
[0004]
[Problems to be solved by the invention]
By the way, a battery as a voltage source of a motor can store extremely large electric power, but the degree of self-discharge is considerably large. If the battery discharges and its stored capacity decreases significantly, even if power is supplied from the battery to the generator / motor, the generator / motor cannot be operated, that is, the engine cannot be started. It will occur.
[0005]
For this reason, among hybrid vehicles in practical use, there is a small emergency motor that can be driven by a battery whose storage amount is greatly reduced, a small emergency generator that is driven by an emergency motor, and an emergency power generation. A small emergency battery that is stored by the machine is equipped separately, and when the amount of power stored in the battery (large main battery) is greatly reduced and the generator motor cannot be driven, the emergency motor is driven. In some cases, a predetermined amount of electricity is stored in an emergency battery, and a generator / motor is driven by the emergency battery.
[0006]
[Problems to be solved by the invention]
As described above, when an engine is started using an emergency motor, an emergency generator, and an emergency battery in order to cope with an emergency situation in which the amount of electricity stored in the battery is greatly reduced, the emergency battery is sufficiently charged. The time until the engine is ready to start will take a considerable amount of time, such as 10 minutes to several tens of minutes. (Because running with a motor may make it impossible to store enough electricity in the emergency battery).
[0007]
The present invention has been made in view of the above circumstances, and its purpose is to start the engine when the amount of charge of the battery is greatly reduced, while ensuring that there is no problem even if the running itself is performed immediately. And it is providing the control apparatus of the hybrid vehicle which made it possible to shorten the time until engine starting.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides the following as a first solution. That is, as described in claim 1 in the claims,
In a control apparatus for a hybrid vehicle that travels in combination with an engine that obtains driving force by burning fuel and a motor that receives power supplied from a battery and obtains driving force,
A generator motor having a function as a generator driven by an engine to charge the battery, and a function as a starter motor for cranking the engine by receiving power from the battery;
A storage amount detection means for detecting that the storage amount of the battery is equal to or less than a predetermined value;
When the storage amount detecting unit detects that the storage amount of the battery is equal to or less than a predetermined value, the engine is stopped while the engine is stopped and the drive wheel and the engine are driven at a predetermined timing while the motor is traveling. And emergency control means for starting the engine by cranking the engine by rotational energy from the drive wheels,
With,
The predetermined timing is set as a brake time for manually operating by the driver to reduce the vehicle speed,
It is like that.Preferred embodiments based on the above solution are claimed in claims 2 to 2.7 andAs described in claim 14.
[0009]
In order to achieve the above object, the present invention provides the following as a second solution. That is, the claims in the claims8As described in
In a control apparatus for a hybrid vehicle that travels in combination with an engine that obtains driving force by burning fuel and a motor that receives power supplied from a battery and obtains driving force,
A generator motor having a function as a generator driven by an engine to charge the battery, and a function as a starter motor for cranking the engine by receiving power from the battery;
A storage amount detection means for detecting that the storage amount of the battery is equal to or less than a predetermined value;
When the storage amount detecting unit detects that the storage amount of the battery is equal to or less than a predetermined value, the engine is stopped while the engine is stopped and the drive wheel and the engine are driven at a predetermined timing while the motor is traveling. And emergency control means for starting the engine by cranking the engine by rotational energy from the drive wheels,
With
When the stored amount of the battery is less than or equal to the predetermined value, the engine control parameter for starting the engine improves the startability of the engine compared to the normal time when the stored amount of the battery is larger than the predetermined value. To be corrected,
It is like that. Preferred embodiments based on the above solution are as described in claims 13 and 14 in the claims.
[0010]
In order to achieve the above object, in the present invention, the third solution is as follows. is there. That is, as described in claim 9 in the claims,
In a control apparatus for a hybrid vehicle that travels in combination with an engine that obtains driving force by burning fuel and a motor that obtains driving force by receiving power supplied from a battery, the battery is charged by being driven by the engine. A generator / motor having a function as a generator for power generation and a function as a starter motor for cranking the engine by receiving power supplied from the battery, and that the charged amount of the battery is equal to or less than a predetermined value When the storage amount detection means to detect and the storage amount detection means detects that the storage amount of the battery is equal to or less than a predetermined value, the motor is allowed to travel while stopping the engine, and the motor is traveling The driving wheel and the engine are connected to each other at a predetermined timing, and the rotation energy from the driving wheel And emergency control means to start the engine by the emissions is cranking,
With
When the amount of electricity stored in the battery is equal to or less than the predetermined value, traveling by the motor is corrected in a direction that saves power consumption of the battery, compared to a normal time when the amount of electricity stored in the battery is larger than the predetermined value. ,
It is like that. Preferred embodiments based on the above solution are as described in claims 13 and 14 in the claims.
[0011]
In order to achieve the above object, in the present invention, the fourth solution is as follows. That is, as described in claim 10 in the claims,
In a control apparatus for a hybrid vehicle that travels in combination with an engine that obtains driving force by burning fuel and a motor that receives power supplied from a battery and obtains driving force,
A generator motor having a function as a generator driven by an engine to charge the battery, and a function as a starter motor for cranking the engine by receiving power from the battery;
A storage amount detection means for detecting that the storage amount of the battery is equal to or less than a predetermined value;
An emergency travel control means for causing the motor to travel while stopping the engine start when it is detected by the power storage amount detection means that the power storage amount of the battery is below a predetermined value;
When the kinetic energy of the vehicle is smaller than a second predetermined value set to a value greater than or equal to the first predetermined value and greater than the first predetermined value during traveling by the motor under the control of the emergency traveling control means, First emergency start control means for connecting the drive wheel and the engine at a predetermined timing and cranking the engine by rotational energy from the drive wheel to start the engine;
When the kinetic energy of the vehicle is greater than or equal to the second predetermined value during traveling by the motor under the control of the emergency traveling control means, the motor is regenerated at a predetermined timing, and the electric power obtained by the regeneration is stored in the battery. A second emergency start control means for starting the engine by cranking the engine by supplying it to the generator / motor in preference to the storage of power;
As provided. Preferred embodiments based on the above solution are as described in claims 11 to 14 in the claims.
[0012]
【The invention's effect】
According to the first aspect, when the storage amount of the battery is so reduced that the generator / motor cannot be driven, the motor can be used for the time being, which is preferable in terms of ensuring the driving. Then, the rotational energy of the drive wheels, which is the kinetic energy of the traveling vehicle, is mechanically applied to the engine, so that the engine can be quickly started (cranking necessary for starting).
Further, it is preferable to perform regeneration for driving the generator and motor during braking by manual operation so that the driver does not feel a shock.
[0013]
According to the second aspect of the present invention, it is possible to easily switch from the running state by the motor alone to the cranking state of the engine by the rotational energy from the drive wheels by utilizing the clutch on / off state.
According to claim 3, when cranking the engine by rotational energy from the drive wheels, it is preferable to increase the fastening force of the lockup clutch and efficiently transmit the rotational energy for cranking the engine. It will be a thing.
According to the fourth aspect of the present invention, starting control for starting the engine is started when the cranking rotation speed becomes substantially maximum, which is preferable for reliably starting the engine.
According to the fifth aspect, the engine is not cranked until the vehicle speed that indicates the kinetic energy of the vehicle is sufficiently improved, that is, the rotational energy from the drive wheels can definitely crank the engine. Waiting until it becomes sufficiently large is preferable for starting the engine more reliably.
According to the sixth aspect, the engine is cranked by the rotational energy from the drive wheels after waiting for the kinetic energy of the traveling vehicle to increase to a state sufficient to crank the engine. This is preferable in order to carry out more reliably.
According to the seventh aspect, the engine control necessary for starting the engine is started after the rotational energy from the drive wheels is sufficiently transmitted to the engine, so that the engine can be started reliably and promptly. This is preferable.
[0014]
According to the eighth aspect of the present invention, when the storage amount of the battery is so reduced that it is impossible to drive the generator / motor, the motor can be used for the time being, which is preferable in terms of ensuring the driving. Then, the rotational energy of the drive wheels, which is the kinetic energy of the traveling vehicle, is mechanically applied to the engine, so that the engine can be quickly started (cranking necessary for starting).
In addition, it is preferable to start the engine more reliably in a state where the startability is prioritized over the vibration and noise of the engine.
[0015]
According to the ninth aspect of the present invention, when the amount of power stored in the battery is so low that it is impossible to drive the generator / motor, the motor can travel for the time being, which is preferable in terms of ensuring travel. Then, the rotational energy of the drive wheels, which is the kinetic energy of the traveling vehicle, is mechanically applied to the engine, so that the engine can be quickly started (cranking necessary for starting).
Further, it is preferable to convert the stored amount of the battery into kinetic energy for vehicle travel without waste as much as possible, that is, to save it so that it can be used for engine cranking energy, and to start the engine more reliably.
[0016]
According to the tenth aspect of the present invention, when the storage amount of the battery is so reduced that the generator / motor cannot be driven, the motor can be used for the time being, which is preferable in terms of ensuring the driving. Then, the rotational energy of the drive wheels, which is the kinetic energy of the traveling vehicle, is mechanically applied to the engine, so that the engine can be quickly started (cranking necessary for starting).
Further, when the kinetic energy of the traveling vehicle is large, the engine is cranked by electrically driving the generator / motor using regeneration of the motor, so that the engine is cranked by the rotational energy from the drive wheels. Compared to the case, the shock is small.
[0017]
According to the eleventh aspect, it is preferable to efficiently supply the regenerative energy to the generator / motor and to reliably drive the generator / motor.
According to claim 12, more energy is supplied by cranking for starting the engine. This is preferable in order to more reliably start the engine.
According to the thirteenth aspect, it is preferable to perform regeneration for driving the generator / motor during braking by manual operation so that the driver does not feel a shock.
According to the fourteenth aspect of the present invention, the driver is clearly recognized that the special control at the time of emergency in which the storage amount of the battery is greatly reduced is performed, so as not to give the driver a sense of incongruity. It is preferable to make it.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
In FIG. 1, 1 is an engine and 2 is a motor. The engine 1 is an internal combustion engine that generates a driving force by burning fuel stored in a fuel tank, and is a high fuel consumption type intake slow closing type (the closing timing of the intake valve is sufficiently delayed) Stuff). The motor 2 is an electric motor that receives a power supply from the battery 3 and generates a driving force. For example, an IPM synchronous motor is used. The battery 3 is, for example, a nickel metal hydride battery having a large storage capacity.
[0019]
The driving force of the engine 1 is transmitted to the left and right drive wheels 9 via the drive shaft 7 and the differential gear 8 through the clutch (main clutch) 4, the torque converter 5 with a lock-up clutch, and the multi-stage transmission mechanism 6. The The drive shaft 7 is connected to the motor 2 (drive shaft thereof) via an interlocking mechanism (for example, an interlocking gear mechanism) 10.
[0020]
When traveling, as will be described later, traveling by using only the engine 1, traveling by using only the motor 2, and traveling by using both the engine 1 and the motor 2 are switched as appropriate. Of course, the clutch 4 is engaged (connected) when traveling by the engine 1, and the clutch 4 is released (disconnected) when traveling only by the motor 2.
[0021]
In FIG. 1, 11 is a generator motor. The generator / motor 11 functions as a generator (generator) that is driven by the engine 1 to generate electric power, and functions as a starter motor that receives power supplied from the battery 3 and performs cranking for starting the engine 1. Are properly used. Reference numeral 12 denotes an inverter that transfers power between the generator / motor 11 and the battery 3, transfers power between the motor 2 and the battery 3, and between the motor 2 (regenerative power) and the generator / motor 11. Controls the exchange of power in
[0022]
In FIG. 1, U is a control unit (controller) configured by using a microcomputer, and has a CPU, a ROM, a RAM, and the like. The control unit U performs its operation control including starting of the engine 1, intermittent control of the clutch 4, intermittent control including adjustment of the engagement force of the lockup clutch of the torque converter 5, and shift control of the transmission 6. . The control unit U also controls the motor 2 (drive force generation or regenerative energy recovery switching control) and the inverter 12. The control unit U also controls the alarm device 13 using a lamp, buzzer or screen display.
[0023]
The control of the inverter 12 by the control unit U controls the power transfer in the following manner, for example. First, basically, the power supplied from the battery 3 to the motor 2 (running control by the motor 2) and the regenerative energy by the motor 2 are converted into the battery.3Control (charging control) to be supplied to the battery, control to supply electric power from the battery 3 to the generator / motor 11 (cranking control for starting the engine), and electric power generated by the generator / motor 11 to the battery 3 Control to supply (charge control) and control to supply electric power generated by the generator / motor 11 to the motor 2 (running control by the motor 2) are performed. In addition, in order to start the engine 1 in the event of an emergency in which the amount of power stored in the battery 3 has fallen so low that the generator / motor 11 cannot be driven, the regenerative energy (electric power) in the motor 2 is supplied to the battery 3 as described later. Control is also performed to supply all to the generator / motor 11 without supplying to the generator.
[0024]
The control unit U is supplied with signals from various sensors S1 to S3 as detection means, in addition to the amount of electricity stored in the battery 3 (for example, as seen in the generated voltage). The sensor S1 detects the engine speed. The sensor S2 detects the rotation speed of the drive shaft 7, that is, the vehicle speed. The sensor S3 detects the operating force (depressing force) of the brake pedal 14.
[0025]
Next, the transmission form of the driving force according to the running state at the normal time when the charged amount of the battery 3 is larger than the level at which the generator / motor 11 can be driven will be described.
[0026]
[At the time of start] The travel is performed using only the driving force of the motor 2.
“During low-speed traveling”, traveling using only the driving force of the motor 2 is assumed.
[Acceleration] Travel is performed using the driving force of both the engine 1 and the motor 2.
[During steady travel] The travel is performed using only the driving force of the engine 1.
[0027]
[Deceleration] Regeneration by the motor 2 is performed to charge the battery 3 (clutch 4 is disengaged).
[During charging during steady running] The clutch 4 is connected to run using the driving force of the engine 1, and the generator / motor 11 is driven by the engine 1 to charge the battery 3. .
[When Charging] The engine 1 is driven by the engine 1 to charge the battery 3 (the clutch 4 is disconnected and the engine 1 does not run).
[0028]
Next, an emergency control in which the storage amount of the battery 3 is reduced to a predetermined value or less, that is, the storage amount is reduced to a state where it is impossible to drive the generator motor 11 by supplying power from the battery 3. The contents will be described with reference to FIG. In the following control, it is assumed that the amount of electricity stored in the battery 3 is not capable of driving the generator / motor 11, but the motor 2 is driven and the motor 2 can travel. When the amount of power stored in the battery 3 has dropped to such an extent that it is impossible to drive the motor 2 as well, it is out of scope.
[0029]
The cranking of the engine 1 at the time of engine start in the event of an emergency when the amount of stored battery is greatly reduced can be broadly divided into the following two types. That is, the first is the motor 2Only byIn this case, the clutch 1 is connected during running and the engine 1 is cranked by the rotational energy from the drive wheels 9. Secondly, regeneration by the motor 2 is performed during traveling by the motor 2 alone, and energy (electric power) obtained by the regeneration is directly supplied to the generator motor 11.ByThis is the case of cranking.
[0030]
Cranking using rotational energy from the drive wheels 9 is performed when the kinetic energy of the traveling vehicle is relatively small. Further, the cranking for driving the generator motor 11 using the regeneration of the motor 2 is performed when the kinetic energy of the traveling vehicle is relatively large. The kinetic energy of the traveling vehicle used for cranking takes into account the magnitude obtained during braking. That is, during traveling by only the motor 2, the kinetic energy (recovered energy) region of the traveling vehicle obtained by braking is equal to or greater than a first predetermined value Eb1 as shown in FIG. The first region is set to be divided into the first region smaller than the second predetermined value Eb2 set as a value larger than the first predetermined value Eb1 and the second region greater than the second predetermined value Eb2.
[0031]
The kinetic energy of the vehicle that can be recovered by the brake for reducing the vehicle speed increases as the vehicle speed increases if the braking force is the same, and increases as the braking force increases if the vehicle speed is the same. This is shown as energy line Eb1 or Eb2. And the isokinetic energy line Eb2 of FIG. 2 has shown the minimum value which can collect | recover the electric power which can drive the generator motor 11 by regeneration. Further, an isokinetic energy line Eb1 in FIG. 2 indicates the lowest value at which power that can be cranked by the rotational energy of the drive wheels 9 can be recovered. When the driver manually operates the brake, the braking force by the brake device that brakes the wheel is reduced by the energy required for cranking.
[0032]
Next, the emergency control related to the engine start when the battery storage amount greatly decreases will be described with reference to the flowcharts of FIGS. In the following description, Q indicates a step.
[0033]
First, in Q1 in the flowchart of FIG. 3, the flag is reset to 0. When this flag is 0, the engine 1 is in a stopped state, and when it is 1, the engine is started. Indicates that Next, in Q2, traveling using only the motor 2 is performed according to the driver's accelerator depression operation. In Q3, it is determined whether or not the voltage of the battery 3 is equal to or less than a predetermined value Eb0. The predetermined value Eb0 is set to a value slightly smaller than the minimum voltage in consideration of the minimum voltage (charged amount) in the range in which the generator 3 can be driven by the battery 3.
[0034]
When the determination in Q3 is YES, that is, in the case of an emergency, the alarm device 13 is activated in Q4 to cause the motor 2 to perform power saving travel and to indicate that it is an emergency. Note that the power-saving travel is performed such that the vehicle acceleration is suppressed to a predetermined value or less, so that the vehicle can travel as much as possible while increasing the vehicle speed.
[0035]
In Q5 after Q4, it is determined whether or not the flag is 1. Initially, this determination is NO and the process proceeds to Q6. In Q6, it is determined whether or not the kinetic energy is greater than or equal to a first predetermined value Eb1 during braking. If YES in Q6, it is determined in Q7 whether or not the kinetic energy is greater than or equal to a second predetermined value Eb2 during braking. If YES in Q7, after confirming in Q8 and Q9 that the generator / motor 11 has not failed and that the regenerative function of the motor 2 has not failed, the regenerative energy of the motor 2 was used. In order to perform cranking, the process proceeds to Q21 in FIG. If NO in Q7, the process goes to Q28 in FIG. 4 to connect the clutch 4 and perform cranking using the rotational energy from the drive wheels 9.
[0036]
In Q21 of FIG. 4, the motor 2 is switched to the regeneration mode and regeneration is performed. The regeneration amount at this time is set so as to be larger than the regeneration amount at the time of normal deceleration when the charged amount of the battery 3 is sufficiently large. Next, in Q22, the energy, that is, the electric power regenerated by the motor 2 is supplied directly to the generator motor 11 without being supplied to the battery 3, and the generator motor 11 is driven to crank the engine 1. Is done.
[0037]
Subsequently, in Q23, the engine start control is performed by supplying fuel and executing ignition so as to start the engine 1 in synchronism with the cranking of the engine 1 by the generator / motor 11. At this time, the control parameters of the engine 1 are changed so that the engine 1 can be started easily even if it is disadvantageous in terms of vibration and noise of the engine as compared with the normal starting. For example, in addition to changing the air-fuel ratio, ignition timing, and fuel pressure, the intake valve closing timing is changed if the variable intake mechanism is provided, and the compression ratio is changed if the variable compression ratio mechanism is provided. .
[0038]
On the other hand, if NO in Q7, NO in Q8, or NO in Q9, the process proceeds to Q28 in FIG. 4 and cranking using the rotational energy of the drive wheels 9 is performed. Control is transferred to. At Q28, the clutch 4 is connected, and then at Q29, the engagement force of the lockup clutch of the torque converter 5 is sufficiently increased as compared with the normal time. Next, at Q30, it is determined whether or not the engine speed (cranking speed) has become substantially maximum. This determination is confirmed, for example, by the rate of change of the engine speed having converged to a value within a substantially constant range (confirmation of a state in which the engine 1 and the drive wheel 9 are rotated completely or almost completely without slipping). . When YES is determined in Q30, engine start control is performed (the same as Q23, engine control parameters are changed for easy start).
[0039]
After Q23 or after Q31, it is confirmed in Q24 whether the engine 1 has actually been started. If YES in Q24, a flag is set to 1 in Q25 to indicate that the engine 1 has been started. Thereafter, in Q26, the generator / motor 11 is driven by the engine 1 to control charging of the battery 3 (the clutch 4 is disconnected and the engine 1 is operated exclusively for charging). If NO in Q24, the flag is reset to 0 in Q27.
[0040]
Once the engine 1 is started, YES is determined in Q5, and at this time, the process proceeds to Q24 (as long as the engine 1 is started, the process proceeds to Q26 and the charging of the battery 3 is continued. ). When YES is determined in Q5, the process may be directly shifted to Q26. However, in the embodiment, Q24 is determined once in consideration of the possibility of engine stall.
[0041]
If the charging of the battery 3 at Q26 is continued, the determination of Q3 will eventually become NO. At this time, the routine proceeds to Q10, where normal control when the battery 3 has a sufficient amount of charge, that is, normal control in a state where the generator / motor 11 can be driven by the battery 3, is performed. At this time, the power saving traveling is canceled and the alarm is also canceled. If NO in Q6, it is determined that cranking is impossible, and the process returns to Q2.
[0042]
Although the embodiment has been described above, the present invention is not limited to this, and includes, for example, the following cases.
(1) The clutch 4 is connected in accordance with the brake operation force or the brake operation speed when the generator / motor 11 is driven by regeneration by the motor 2 on the condition that the brake is operated manually by the driver. The speed may be changed (the greater the operating force and operating speed, the higher the connection speed—preventing or reducing the connection shock from causing the driver to feel uncomfortable).
[0043]
(2) Cranking can be performed at a timing other than when the driver operates the brake. For example, in order to obtain the drive energy of the generator / motor 11, for example, when the vehicle speed exceeds a predetermined vehicle speed, automatic braking by regeneration of the motor 2 may be performed. In this case, the automatic braking is activated in advance. It is preferable to alert this. In addition, regardless of the brake operation by the driver, the clutch 4 can be automatically connected when the vehicle speed exceeds the predetermined vehicle speed to perform cranking (also in this case, the clutch 4 It is preferable to make an alarm in advance before connecting.
[0044]
(3) The current kinetic energy obtained using the vehicle speed and braking force as parameters is obtained from a map as shown in FIG. 2, and the obtained kinetic energy is greater than a predetermined threshold value Eb1 or Eb2. Cranking can be performed when it becomes large. It should be noted that when shifting to cranking in consideration of fluctuations in braking force, it is preferable that the vehicle speed be set on the premise that the vehicle speed is equal to or higher than a predetermined vehicle speed. For example, in FIG. 2, cranking by regeneration (cranking by driving the generator motor 11) is performed on the assumption that the braking force is equal to or higher than the second predetermined vehicle speed VO2 corresponding to FBO set to a relatively small value. The drive wheel is connected with the clutch 4 on the assumption that the first predetermined vehicle speed VO1 or higher.From 9It is preferable to perform cranking using the rotational energy.
[0045]
(4) The cranking using the regeneration of the motor 2 may not be performed, and only the cranking using the rotational energy of the drive wheels 9 may be performed.
(5) The torque converter 5 and the transmission 6 may not be provided.
(6) A generator that uses energy from regeneration so that the frequency (opportunity) of regeneration by the motor 2 is increased in an emergency when the battery storage amount is less than or equal to a predetermined value, compared to a normal time when the battery storage amount is sufficiently large. -The opportunity which can drive the motor 11 can also be increased. For example, the regeneration is such that the generator motor 11 can be driven when the vehicle speed is at a predetermined vehicle speed or higher even when the vehicle 2 is normally decelerated so that the regeneration by the motor 2 is not performed (for example, when the accelerator is being returned). When energy can be recovered, deceleration (braking action) greater than normal time using regeneration can be performed.
[0046]
(7) During power-saving travel, it is possible to prohibit the operation of electrical equipment unrelated to travel or safety, such as an air conditioner or audio. Various members such as each step or sensor shown in the flowchart can be expressed by adding the name of the means to the high-order expression of the function. Further, the object of the present invention is not limited to what is explicitly stated, but also implicitly includes providing what is substantially preferred or expressed as an advantage. Furthermore, the present invention can also be expressed as a control method.
[Brief description of the drawings]
FIG. 1 is an overall system diagram showing an embodiment of the present invention.
FIG. 2 is a diagram for explaining kinetic energy (regenerative energy) of a traveling vehicle.
FIG. 3 is a flowchart showing a control example of the present invention.
FIG. 4 is a flowchart showing a control example of the present invention.
[Explanation of symbols]
1: Engine
2: Motor
3: Battery
4: Clutch
5: Torque converter with lock-up clutch
9: Drive wheel
11: Generator motor
13: Alarm
14: Brake pedal
S1: Engine speed sensor
S2: Vehicle speed sensor
S3: Brake force sensor
U: Control unit

Claims (14)

In a control apparatus for a hybrid vehicle that travels in combination with an engine that obtains driving force by burning fuel and a motor that receives power supplied from a battery and obtains driving force,
A generator motor having a function as a generator driven by an engine to charge the battery, and a function as a starter motor for cranking the engine by receiving power from the battery;
A storage amount detection means for detecting that the storage amount of the battery is equal to or less than a predetermined value;
When the storage amount detecting unit detects that the storage amount of the battery is equal to or less than a predetermined value, the engine is stopped while the engine is stopped and the drive wheel and the engine are driven at a predetermined timing while the motor is traveling. And emergency control means for starting the engine by cranking the engine by rotational energy from the drive wheels,
Equipped with a,
The predetermined timing is set as a brake time for manually operating by the driver to reduce the vehicle speed,
The control apparatus of the hybrid vehicle characterized by the above-mentioned. In claim 1,
A clutch is interposed in the drive path that transmits the driving force from the engine to the drive wheels,
When running with only the motor, the clutch is disengaged,
When the engine is cranked by rotational energy from the drive wheels, the clutch is connected.
The control apparatus of the hybrid vehicle characterized by the above-mentioned. In claim 1,
A torque converter with a lock-up clutch is interposed in the drive path that transmits the driving force from the engine to the drive wheels.
When the engine is cranked by rotational energy from the drive wheels, the lockup clutch is fastened and the fastening force of the lockup clutch is increased compared to the normal time.
The control apparatus of the hybrid vehicle characterized by the above-mentioned. In claim 1,
A control device for a hybrid vehicle, characterized in that when cranking an engine by rotational energy from drive wheels, engine control necessary for starting the engine is started when the engine rotational speed becomes substantially maximum . In claim 1,
A control apparatus for a hybrid vehicle, characterized in that the emergency control means is operated on condition that the vehicle speed is equal to or higher than a predetermined vehicle speed. In claim 1,
A control apparatus for a hybrid vehicle, characterized in that engine cranking is performed by rotational energy from drive wheels on condition that the kinetic energy of a traveling vehicle running only by a motor becomes a predetermined value or more. In claim 2,
The hybrid vehicle control apparatus according to claim 1, wherein engine control necessary for starting the engine is started after the clutch is completely engaged. In a control apparatus for a hybrid vehicle that travels in combination with an engine that obtains driving force by burning fuel and a motor that receives power supplied from a battery and obtains driving force,
And functions as a generator for being driven by the engine to charge the battery, and the generator-motor and a function as Sutatamo over another in order to crank the engine supplied with electric power from the battery,
A storage amount detection means for detecting that the storage amount of the battery is equal to or less than a predetermined value;
When the storage amount detecting unit detects that the storage amount of the battery is equal to or less than a predetermined value, the engine is stopped while the engine is stopped and the drive wheel and the engine are driven at a predetermined timing while the motor is traveling. And emergency control means for starting the engine by cranking the engine by rotational energy from the drive wheels,
With
When the stored amount of the battery is less than or equal to the predetermined value , the engine control parameter for starting the engine improves the startability of the engine compared to the normal time when the stored amount of the battery is larger than the predetermined value. To be corrected,
The control apparatus of the hybrid vehicle characterized by the above-mentioned. In a control apparatus for a hybrid vehicle that travels in combination with an engine that obtains driving force by burning fuel and a motor that receives power supplied from a battery and obtains driving force,
A generator motor having a function as a generator driven by an engine to charge the battery, and a function as a starter motor for cranking the engine by receiving power from the battery;
A storage amount detection means for detecting that the storage amount of the battery is equal to or less than a predetermined value;
When the storage amount detecting unit detects that the storage amount of the battery is equal to or less than a predetermined value, the engine is stopped while the engine is stopped and the drive wheel and the engine are driven at a predetermined timing while the motor is traveling. And emergency control means for starting the engine by cranking the engine by rotational energy from the drive wheels,
With
When the amount of electricity stored in the battery is equal to or less than the predetermined value, traveling by the motor is corrected in a direction that saves power consumption of the battery, compared to a normal time when the amount of electricity stored in the battery is larger than the predetermined value. ,
The control apparatus of the hybrid vehicle characterized by the above-mentioned. In a control apparatus for a hybrid vehicle that travels in combination with an engine that obtains driving force by burning fuel and a motor that receives power supplied from a battery and obtains driving force,
A generator motor having a function as a generator driven by an engine to charge the battery, and a function as a starter motor for cranking the engine by receiving power from the battery;
A storage amount detection means for detecting that the storage amount of the battery is equal to or less than a predetermined value;
An emergency travel control means for causing the motor to travel while stopping the start of the engine when it is detected by the power storage amount detection means that the power storage amount of the battery is below a predetermined value;
When the kinetic energy of the vehicle is smaller than a second predetermined value set to a value greater than or equal to the first predetermined value and greater than the first predetermined value during traveling by the motor under the control of the emergency traveling control means, First emergency start control means for connecting the drive wheel and the engine at a predetermined timing and cranking the engine by rotational energy from the drive wheel to start the engine;
When the kinetic energy of the vehicle is greater than or equal to the second predetermined value during traveling by the motor under the control of the emergency traveling control means, the motor is regenerated at a predetermined timing, and the electric power obtained by the regeneration is stored in the battery. A second emergency start control means for starting the engine by cranking the engine by supplying it to the generator motor in preference to the power storage to
A control apparatus for a hybrid vehicle, comprising: In claim 10,
The hybrid vehicle control apparatus is characterized in that electric power obtained at the time of regeneration is directly supplied to the generator / motor without passing through the battery to perform cranking of the engine. In claim 10,
When the regeneration is performed by the emergency control means, the hybrid is corrected so that the regeneration amount is increased as compared with the normal time when the storage amount of the battery is larger than the predetermined value. Automotive control device. In any one of claims 8 to 12 ,
The control apparatus for a hybrid vehicle, characterized in that the predetermined timing is set as a time of braking for manually reducing the vehicle speed by a driver. 14. In any one of claims 1 to 13,
A control device for a hybrid vehicle, wherein an alarm is issued when the amount of electricity stored in the battery is equal to or less than the predetermined value.

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