CN108869160A - Digital drive system and its shift control method - Google Patents
Digital drive system and its shift control method Download PDFInfo
- Publication number
- CN108869160A CN108869160A CN201810432791.3A CN201810432791A CN108869160A CN 108869160 A CN108869160 A CN 108869160A CN 201810432791 A CN201810432791 A CN 201810432791A CN 108869160 A CN108869160 A CN 108869160A
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- Prior art keywords
- hydraulic
- shunt pump
- pump
- hydraulic motor
- valve
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B15/00—Controlling
- F03B15/02—Controlling by varying liquid flow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/10—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of fluid gearing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B23/00—Pumping installations or systems
- F04B23/04—Combinations of two or more pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Computer Hardware Design (AREA)
- Transportation (AREA)
- Motor Power Transmission Devices (AREA)
Abstract
The invention discloses a kind of digital drive system and its shift control methods, it includes hydraulic motor, hydraulic shunt pump, PLC controller, fuel tank and hydraulic valve, the fuel tank is connected with hydraulic shunt pump and hydraulic motor respectively, the hydraulic shunt pump passes through hydraulic valve respectively and is connected with hydraulic motor, the PLC controller is electrically connected with hydraulic shunt pump and hydraulic valve respectively, the hydraulic valve includes check valve, solenoid directional control valve and overflow valve, the oil inlet of the hydraulic shunt pump is connected with fuel tank respectively, the oil outlet of the hydraulic shunt pump is connected with check valve respectively, the check valve is connected with solenoid directional control valve respectively, the solenoid directional control valve is connected with hydraulic motor and fuel tank respectively, the invention has the advantages that：1, use cost is low；2, transmission efficiency is high；3, easy to operate；4, safety coefficient is high；5, an axis is used to pump more；6, energy-saving effect is good.
Description
Technical field
The present invention relates to the technical fields of drive system, more particularly to vehicle drive system and its shift control
The technical field of method.
Background technique
Hydraulic motor is one of hydraulic system executive component, it drives the output shaft of hydraulic motor to turn by hydraulic
It is dynamic, it is mainly used in injection machine, rises and raises machine, engineering machinery, building machinery, coal mine machinery, mining machinery, metallurgical machinery, ship
The fields such as oceangoing ship is mechanical, petrochemical industry and harbour machinery, it has, and small in size, light-weight, structure is simple, good manufacturability, to oil liquid
Pollution is insensitive, the advantages that impact resistance and inertia are small.
The drive system of current general vehicle on the market is mainly by components such as engine, clutch, gearbox and transmission shafts
Composition, is shifted gears by gearbox, the power of engine is transferred to wheel by transmission shaft, to drive vehicle to run.So
And above-mentioned conventional drive system is used to carry out power transmitting and shift, there are following drawbacks：First is that use cost is high, due to
Structure is complicated for the components such as clutch, gearbox, and the propeller shaft length of rear-guard vehicle is longer, heavier-weight, therefore manufactures
It is at high cost, use cost is increased, and maintenance and maintenance cost are high；Second is that transmission efficiency is lower, due to conventional drive system
Power in transmittance process, there are the kinetic equation losses such as serious friction, therefore greatly reduce transmission efficiency；Third is that being not easy to grasp
Make, shifted gears using traditional gearbox, when being shifted gears in particular by manual transmission, need to use both hands and feet, operates
It is inconvenient, shift control trouble, and due to the limitation of gearshift mechanical structure, it cannot achieve to the remote of gear
Control；Fourth is that safety coefficient is low, traditional gearbox is likely to occur off-gear or phenomenon of trip stopping, to cause to run out of steam or stop not
Firmly the phenomenon that vehicle, therefore there are great security risks.And the vehicle of conventionally employed aerodynamic brake is in initial start stage due to gas
It is insufficient that pump air pressure deficiency is easy to cause brake control power, therefore brake control power is insufficient in order to prevent, often in vehicle launch
It needs to wait for a period of time and be inflated for the air pump that brakes, to waste the time.Fifth is that the output of conventional truck engine
Torque is smaller, then needs to carry out deceleration using retarder to increase square to increase torque, and so, then considerably increase transmission
The weight and complex degree of structure of system.
Summary of the invention
It is simple the object of the invention is to provide a kind of structure in order to solve above-mentioned deficiency, can effectively reduce use at
This, transmission efficiency is high, and gear shift operation is very convenient, while being greatly improved the digital drive system and its gear of safety coefficient
Position control method.
In order to solve the above-mentioned technical problem technical solution that the present invention uses is as follows：
Digital drive system, it includes hydraulic motor, hydraulic shunt pump, PLC controller, fuel tank and hydraulic valve, the fuel tank point
It is not connected with hydraulic shunt pump and hydraulic motor, the hydraulic shunt pump passes through hydraulic valve respectively and is connected with hydraulic motor, described
PLC controller is electrically connected with hydraulic shunt pump and hydraulic valve respectively.
The hydraulic valve includes check valve, solenoid directional control valve and overflow valve, the oil inlet of the hydraulic shunt pump respectively with
Fuel tank is connected, and the oil outlet of the hydraulic shunt pump is connected with check valve respectively, the check valve respectively with solenoid directional control valve
Be connected, the solenoid directional control valve is connected with hydraulic motor and fuel tank respectively, one end of the overflow valve respectively with hydraulic separate
The oil outlet of pump is connected with check valve, and the other end of overflow valve is connected with fuel tank, and the solenoid directional control valve is controlled with PLC respectively
Device electrical connection processed.
The shift control method of digital drive system, control method are as follows：The gear number A of the hydraulic motor with it is hydraulic
The revolving speed of motor output shaft is corresponding in ratio, and the metric gear number A of hydraulic motor is converted to the binary number of n digit（Bn-1
Bn-2…B1B0）, the digit of binary number corresponding to the maximum value of the hydraulic motor decimal system gear number A is m, by hydraulic separate
The number of pump is set as m, and first hydraulic shunt pump is 1 hydraulic shunt pump, and second hydraulic shunt pump is m-th of 2 hydraulic shunt pump ...
Hydraulic shunt pump is 2m-1Hydraulic shunt pump, the metered flow of first to m-th hydraulic shunt pump respectively with its label（1,2,…2m-1）
It is corresponding in ratio, the gear number A of hydraulic motor=（Bn-1×2n-1+ Bn-2×2n-2+ ...+B1×21+ B0×20）, pass through PLC
Controller controls Bn-1×2n-1Hydraulic shunt pump, Bn-2×2n-2Hydraulic shunt pump ... B1×21Hydraulic shunt pump and B0×20Hydraulic shunt pump is same
When to hydraulic motor pump oil, so that hydraulic motor is reached corresponding gear number A.
The present invention is using the attainable beneficial effect of above-mentioned technical solution institute：
1, use cost is low.This number drive system eliminates the transmission of the complexity such as clutch and gearbox of conventional drive system
Component, and the transmission shaft of traditional rear-guard vehicle is eliminated, controlling hydraulic shunt pump by PLC controller can be defeated to hydraulic motor
The revolving speed of shaft is controlled, and realizes the shift control to hydraulic motor, and can realize the far distance control to gear, thus
The drive system structure, gearshift structure and gear shift operation process of drive system are greatly simplified, drive system is reduced
Manufacturing cost and use cost, and significantly reduce the failure rate of drive system, effectively reduce cost of upkeep, tie up simultaneously
It repairs also very convenient.And the gear of hydraulic motor is controlled by the shift control method of this number drive system
System, to farthest simplify the structure of this number drive system, reduces the manufacturing cost of this number drive system, together
When shift logic it is simple and easy, realize the shift of efficient stable, effectively reduce the failure rate in shift process.
2, transmission efficiency is high.Due to eliminating the transmission parts such as clutch and gearbox, thus reduce power pass through from
Clutch and gearbox carry out the kinetic equation losses such as the friction occurred in transmittance process to be reduced to substantially increase transmission efficiency
Oil consumption, and noise is reduced, it is very environmentally friendly.
3, easy to operate.Different hydraulic shunt pumps is controlled by PLC controller to be combined, and hydraulic motor is controlled,
Can be obtained the gear number of different hydraulic motors, and PLC controller operate it is very convenient, can be as needed by PLC
Controller is placed on suitable position, and can be operated by body corresponding site to PLC controller, easy to operate fast
Victory is shifted gears, thus greatly for the gearshift of traditional manual gear without using gear lever engagement clutch
It is labor intensity when alleviating shift greatly, time saving and energy saving.
4, safety coefficient is high.Since the output power moment of hydraulic motor and wheel are in connection status, tradition is avoided
Gearbox occurs trip stopping or off-gear, caused by power and wheel the phenomenon that disconnecting, particularly with heavy-duty machineries such as heavy trucks,
It avoids and goes up a slope or long descending during occurs trip stops, hung not Shang phenomena such as keeping off or shift gears car slipping long, to greatly improve
Safety coefficient；And this number drive system may also function as good braking effect, cooperate the brake in conventional drive system
Device can effectively avoid the phenomenon that brake does not live vehicle, further improve safety coefficient；Meanwhile can travel after vehicle launch, it keeps away
Traditional, pneumatic brake is exempted from and has braked hypodynamic phenomenon caused by vehicle launch initial stage is insufficient due to air pump air pressure, has saved
Traditional, pneumatic brake air pump is inflated the time.
5, an axis is used to pump more.Multiple hydraulic shunt pumps are attached with a hydraulic motor simultaneously respectively, thus real
An axis is showed to pump more, the output torque of hydraulic motor not only greatly improved, but also effectively increase the gear control of hydraulic motor
Precision processed, while simplifying the shift logic of hydraulic motor；
6, energy-saving effect is good.When accelerating, with the increase of gear, car speed improves this drive system naturally, changes biography
Oil burning power system of uniting when accelerating, when gear is in it is most high-grade when, speed can only be improved by increasing fuel supply volume
Deficiency, energy-saving effect are fairly obvious.
Specific embodiment
Fig. 1 is the structural schematic diagram of the digital drive system of the present invention；
Fig. 2 is PLC control program of the invention.
Specific embodiment
As shown in Figure 1, digital drive system, it includes hydraulic motor 1, hydraulic shunt pump, PLC controller 2,5 and of fuel tank
Hydraulic valve, the hydraulic valve include check valve 7, solenoid directional control valve 8 and overflow valve 9, and the oil inlet 10 of the hydraulic shunt pump divides
Be not connected with fuel tank 5, the oil outlet 12 of the hydraulic shunt pump is connected with check valve 7 respectively, the check valve 7 respectively with electricity
Magnetic reversal valve 8 is connected, and the solenoid directional control valve 8 is connected with hydraulic motor 1 and fuel tank 5 respectively, one end of the overflow valve 9
It is connected respectively with the oil outlet of hydraulic shunt pump 12 and check valve 7, the other end of overflow valve 9 is connected with fuel tank 5, the PLC
Controller 2 is electrically connected with hydraulic shunt pump and solenoid directional control valve 8 respectively.Above-mentioned hydraulic motor 1, hydraulic shunt pump, fuel tank 5 and hydraulic valve
It directly can commercially obtain, the control program of PLC controller 2 is as shown in Fig. 2, its connection type is the normal of this field
See technology, can be realized by those skilled in the art.
The shift control method of digital drive system, control method are as follows：The gear number A and liquid of the hydraulic motor 1
The revolving speed of 1 output shaft of pressure motor is corresponding in ratio, and the metric gear number A of hydraulic motor 1 is converted to the binary number of n digit
（Bn-1 Bn-2…B1B0）, the digit of binary number corresponding to the maximum value of 1 decimal system gear number A of hydraulic motor is m, will
The number of hydraulic shunt pump is set as m, and first hydraulic shunt pump is 1 hydraulic shunt pump, and second hydraulic shunt pump is 2 hydraulic shunt pumps ...
M-th of hydraulic shunt pump is 2m-1Hydraulic shunt pump, the metered flow of first to m-th hydraulic shunt pump respectively with its label（1,2,…
2m-1）It is corresponding in ratio, the gear number A of hydraulic motor 1=（Bn-1×2n-1+ Bn-2×2n-2+ ...+B1×21+ B0×20）, lead to
It crosses PLC controller 2 and controls Bn-1×2n-1Hydraulic shunt pump, Bn-2×2n-2Hydraulic shunt pump ... B1×21Hydraulic shunt pump and B0×20It is hydraulic
Wheel cylinder makes hydraulic motor 1 reach corresponding gear number A simultaneously to 1 pump oil of hydraulic motor.
Such as when the gear number A maximum value of hydraulic motor 1 is 15, metric gear number 1 ~ 15 is respectively converted into two
System number：1D=1B, 2D=10B, 3D=11B, 4D=100B, 5D=101B, 6D=110B, 7D=111B, 8D=1000B, 9D=1001B,
10D=1010 B, 11D=1011B, 12D=1100B, 13D=1101B, 14D=1110B, 15D=1111B.
4, and respectively 1 hydraulic shunt pump 40,2 hydraulic shunt pumps 41,4 hydraulic shunt pumps 42 are set by the number of hydraulic shunt pump
With 8 hydraulic shunt pumps 43.
When needing the gear number A control of hydraulic motor 1 is 1,1=1, then it is hydraulic by the control 1 of PLC controller 2 at this time
Wheel cylinder 40 makes hydraulic motor 1 reach 1 gear to 1 pump oil of hydraulic motor；
When needing the gear number A control of hydraulic motor 1 is 2,2=2, then 2 hydraulic shunt pumps are controlled by PLC controller 2 at this time
41, to 1 pump oil of hydraulic motor, make hydraulic motor 1 reach 2 gears；
When needing the gear number A control of hydraulic motor 1 is 3,3=2+1 then controls 2 hydraulic separates by PLC controller 2 at this time
41 and 1 hydraulic shunt pump 40 of pump makes hydraulic motor 1 reach 3 gears simultaneously to 1 pump oil of hydraulic motor；
When needing the gear number A control of hydraulic motor 1 is 4,4=4, then 4 hydraulic shunt pumps are controlled by PLC controller 2 at this time
42, to 1 pump oil of hydraulic motor, make hydraulic motor 1 reach 4 gears；
When needing the gear number A control of hydraulic motor 1 is 5,5=4+1 then controls 4 hydraulic separates by PLC controller 2 at this time
42 and 1 hydraulic shunt pump 40 of pump makes hydraulic motor 1 reach 5 gears simultaneously to 1 pump oil of hydraulic motor；
When needing the gear number A control of hydraulic motor 1 is 6,6=4+2 then controls 4 hydraulic separates by PLC controller 2 at this time
42 and 2 hydraulic shunt pump 41 of pump makes hydraulic motor 1 reach 6 gears simultaneously to 1 pump oil of hydraulic motor；
When needing the gear number A control of hydraulic motor 1 is 7,7=4+2+1 is then hydraulic by the control 4 of PLC controller 2 at this time
Wheel cylinder 42,2 hydraulic shunt pumps of hydraulic shunt pump 41 and 1 40 make hydraulic motor 1 reach 3 gears simultaneously to 1 pump oil of hydraulic motor；
When needing the gear number A control of hydraulic motor 1 is 8,8=8, then 8 hydraulic shunt pumps are controlled by PLC controller 2 at this time
43, to 1 pump oil of hydraulic motor, make hydraulic motor 1 reach 8 gears；
When needing the gear number A control of hydraulic motor 1 is 9,9=8+1 then controls 8 hydraulic separates by PLC controller 2 at this time
43 and 1 hydraulic shunt pump 40 of pump makes hydraulic motor 1 reach 9 gears simultaneously to 1 pump oil of hydraulic motor；
When needing the gear number A control of hydraulic motor 1 is 10,10=8+2 is then hydraulic by the control 8 of PLC controller 2 at this time
The hydraulic shunt pump of wheel cylinder 43 and 2 41 makes hydraulic motor 1 reach 10 gears simultaneously to 1 pump oil of hydraulic motor；
When needing the gear number A control of hydraulic motor 1 is 11,11=8+2+1 then controls 8 liquid by PLC controller 2 at this time
It presses wheel cylinder 43,2 hydraulic shunt pumps of hydraulic shunt pump 41 and 1 40 simultaneously to 1 pump oil of hydraulic motor, hydraulic motor 1 is made to reach 11 gears；
When needing the gear number A control of hydraulic motor 1 is 12,12=8+4 is then hydraulic by the control 8 of PLC controller 2 at this time
The hydraulic shunt pump of wheel cylinder 43 and 4 42 makes hydraulic motor 1 reach 12 gears simultaneously to 1 pump oil of hydraulic motor；
When needing the gear number A control of hydraulic motor 1 is 13,13=8+4+1 then controls 8 liquid by PLC controller 2 at this time
It presses wheel cylinder 43,4 hydraulic shunt pumps of hydraulic shunt pump 42 and 1 40 simultaneously to 1 pump oil of hydraulic motor, hydraulic motor 1 is made to reach 13 gears；
When needing the gear number A control of hydraulic motor 1 is 14,14=8+4+2 then controls 8 liquid by PLC controller 2 at this time
It presses wheel cylinder 43,4 hydraulic shunt pumps of hydraulic shunt pump 42 and 2 41 simultaneously to 1 pump oil of hydraulic motor, hydraulic motor 1 is made to reach 14 gears；
When needing the gear number A control of hydraulic motor 1 is 15,15=8+4+2+1 then passes through the control of PLC controller 28 at this time
Hydraulic shunt pump 43,4 hydraulic shunt pumps 42,2 hydraulic shunt pumps of hydraulic shunt pump 41 and 1 40 make hydraulic motor simultaneously to 1 pump oil of hydraulic motor
1 reaches 15 gears.
The output shaft of hydraulic motor 1 and vehicle axle 13 can be sequentially connected by this number drive system at work,
By hydraulic shunt pump to 1 pump oil of hydraulic motor, the output shaft rotation of hydraulic motor 1 is driven, and then wheel 6 is driven by vehicle bridge 13
Rotation, makes vehicle advance.It, can be 2 by PLC controller since the revolving speed of 1 output shaft of hydraulic motor depends on fuel delivery
Pump oil is carried out according to the different corresponding hydraulic shunt pumps of shift control, by the combination of different hydraulic shunt pumps, can get accurate pump
Oil mass, to can control the revolving speed of 1 output shaft of hydraulic motor, reach pair when the load of hydraulic motor 1 is certain value
The purpose that the gear of hydraulic motor 1 is accurately controlled.
Claims (3)
1. digital drive system, it is characterised in that：It includes hydraulic motor, hydraulic shunt pump, PLC controller, fuel tank and hydraulic
Valve, the fuel tank are connected with hydraulic shunt pump and hydraulic motor respectively, and the hydraulic shunt pump passes through hydraulic valve and hydraulic horse respectively
Up to being connected, the PLC controller is electrically connected with hydraulic shunt pump and hydraulic valve respectively.
2. number drive system according to claim 1, it is characterised in that：The hydraulic valve includes check valve, electromagnetism
The oil inlet of reversal valve and overflow valve, the hydraulic shunt pump is connected with fuel tank respectively, the oil outlet difference of the hydraulic shunt pump
Be connected with check valve, the check valve is connected with solenoid directional control valve respectively, the solenoid directional control valve respectively with hydraulic motor
Be connected with fuel tank, one end of the overflow valve is connected with the oil outlet of hydraulic shunt pump and check valve respectively, overflow valve it is another
One end is connected with fuel tank, and the solenoid directional control valve is electrically connected with PLC controller respectively.
3. the shift control method of number drive system according to claim 1 or 2, it is characterised in that its control method is such as
Under：The gear number A of the hydraulic motor and the revolving speed of hydraulic motor output shaft are corresponding in ratio, by the metric gear of hydraulic motor
Digit A is converted to the binary number of n digit（Bn-1 Bn-2…B1B0）, the maximum value institute of the hydraulic motor decimal system gear number A
The digit of corresponding binary number is m, sets m for the number of hydraulic shunt pump, and first hydraulic shunt pump is 1 hydraulic shunt pump,
Second hydraulic shunt pump is that 2 hydraulic shunt pump ..., m-th of hydraulic shunt pump is 2m-1Hydraulic shunt pump, first to m-th hydraulic shunt pump
Metered flow respectively with its label（1,2,…2m-1）It is corresponding in ratio, the gear number A of hydraulic motor=（Bn-1×2n-1+ Bn-2×
2n-2+ ...+B1×21+ B0×20）, B is controlled by PLC controllern-1×2n-1Hydraulic shunt pump, Bn-2×2n-2Hydraulic shunt pump ... B1
×21Hydraulic shunt pump and B0×20Hydraulic shunt pump makes hydraulic motor reach corresponding gear number A simultaneously to hydraulic motor pump oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810432791.3A CN108869160A (en) | 2018-05-08 | 2018-05-08 | Digital drive system and its shift control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810432791.3A CN108869160A (en) | 2018-05-08 | 2018-05-08 | Digital drive system and its shift control method |
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| Publication Number | Publication Date |
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| CN108869160A true CN108869160A (en) | 2018-11-23 |
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ID=64326546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201810432791.3A Pending CN108869160A (en) | 2018-05-08 | 2018-05-08 | Digital drive system and its shift control method |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0047643A1 (en) * | 1980-09-04 | 1982-03-17 | Advanced Energy Systems Inc. | Fuel-efficient energy storage automotive drive system |
| CN85103339A (en) * | 1985-04-01 | 1987-01-17 | 上海交通大学 | Hydraulic governor by direct control |
| CN201265354Y (en) * | 2008-09-18 | 2009-07-01 | 山东正元地质资源勘查有限责任公司烟台分公司 | Light full-hydraulic core drilling rig |
| CN102390263A (en) * | 2011-09-30 | 2012-03-28 | 江苏大学 | Comprehensive recovery system of hydraulic car brake energy and hanger bracket vibration energy |
| CN203062948U (en) * | 2012-12-27 | 2013-07-17 | 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 | Hydraulic pilot control system of oil-liquid hybrid power concrete mixer truck |
| CN106958546A (en) * | 2017-04-17 | 2017-07-18 | 燕山大学 | Numeric type hydraulic transformer |
| CN208169046U (en) * | 2018-05-08 | 2018-11-30 | 陶德豪 | Digital drive system |
-
2018
- 2018-05-08 CN CN201810432791.3A patent/CN108869160A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0047643A1 (en) * | 1980-09-04 | 1982-03-17 | Advanced Energy Systems Inc. | Fuel-efficient energy storage automotive drive system |
| CN85103339A (en) * | 1985-04-01 | 1987-01-17 | 上海交通大学 | Hydraulic governor by direct control |
| CN201265354Y (en) * | 2008-09-18 | 2009-07-01 | 山东正元地质资源勘查有限责任公司烟台分公司 | Light full-hydraulic core drilling rig |
| CN102390263A (en) * | 2011-09-30 | 2012-03-28 | 江苏大学 | Comprehensive recovery system of hydraulic car brake energy and hanger bracket vibration energy |
| CN203062948U (en) * | 2012-12-27 | 2013-07-17 | 徐工集团工程机械股份有限公司江苏徐州工程机械研究院 | Hydraulic pilot control system of oil-liquid hybrid power concrete mixer truck |
| CN106958546A (en) * | 2017-04-17 | 2017-07-18 | 燕山大学 | Numeric type hydraulic transformer |
| CN208169046U (en) * | 2018-05-08 | 2018-11-30 | 陶德豪 | Digital drive system |
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