CN206765818U - A kind of Hydrostatic drive vehicle speed control system - Google Patents
A kind of Hydrostatic drive vehicle speed control system Download PDFInfo
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- CN206765818U CN206765818U CN201720389620.8U CN201720389620U CN206765818U CN 206765818 U CN206765818 U CN 206765818U CN 201720389620 U CN201720389620 U CN 201720389620U CN 206765818 U CN206765818 U CN 206765818U
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- pump
- variable
- engine
- displacement motor
- variable displacement
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Abstract
The utility model discloses a kind of Hydrostatic drive vehicle speed control system, including engine, variable pump, variable displacement motor, gearbox, wheel, slippage pump, pressure sensor, brake pedal, accelerator pedal, controller；Engine is connected with variable pump and slippage pump Mechanical Driven simultaneously；Variable pump is connected with variable displacement motor hydraulic-driven, and slippage pump is arranged between variable pump and variable displacement motor；Variable displacement motor mechanically connects with gearbox, and gearbox mechanically connects with wheel；Pressure sensor is arranged on the oil pressure that oil circuit is detected on the hydraulic circuit of variable pump；Engine, variable pump, variable displacement motor, pressure sensor, brake pedal, accelerator pedal are electrically connected with the controller.The utility model solves the problems, such as that vehicle can not be slided using itself kinetic energy, reduces energy loss, improve the economy of vehicle by adjusting the swash plate angle of pump；Keep speed not increase simultaneously, reduce the danger for being continuously increased and triggering by deadweight speed during vehicle descending.
Description
Technical field
The utility model is related to the speed control system of Hydrostatic drive vehicle, especially with regard to one kind throttle reduce (or
Slide) when Auto speed-control system.
Background technology
At present, for Hydrostatic drive due to convenient with driveline arrangement, working media is that hydraulic oil does not have impact shock, is led to
Cross overflow and be widely used on vehicle the advantages that the control of variable pump can prevent vehicle from stopping working because of overload.But by
Focus mostly in current hydraulic transmission technology and followed in the power of drive part, reduce the power during (sliding) for throttle
Control research is then less.This comes from：First, simply follow the output displacement of pump and engine speed, when engine idling
When, motor immediately becomes braking, influences the economy of vehicle；Secondly when the engine is idling, if making the discharge capacity that pump matches
With speed, then when vehicle travels on slope road, because its car weight is larger, travel speed is low, is easily produced in the presence of deadweight
The increase of speed, but because driving cycle is poor, the bad reason of driver's seat easily causes driver's anxiety, fatigue, forms thing
Therefore hidden danger.Therefore, propose that a kind of throttle reduces the method for controlling driving speed under (sliding) state for automotive power structure, be
Ensure one of key technique of vehicle safety.
The throttle of machine driving vehicle reduces (sliding) process and relies primarily on engine anti-dragged brake, during descending, business
The retarder of different types with vehicle application；Off-road vehicle develops abrupt slope during big descending and delays drop technology；Electric transmission
Vehicle has patent and the application of descending auxiliary correlation technique at present；Hydrostatic drive vehicle (being the engineering truck of low speed mostly) mesh
The preceding research without for throttle reduction (sliding) and descending operating mode.
Hydrostatic drive is different from machine driving, and the rotating speed between wheel and engine is not fixed proportionate relationship, therefore
Engine anti-dragged brake can not be used for reference completely.Retarder and abrupt slope delay drop technology and can apply to Hydrostatic drive vehicle, but relatively
In automobile, the operating mode of of Hydrostatic drive vehicle itself and operation are all sufficiently complex, and cost is higher, and application prospect is little.Hydrostatic
Driven vehicle has similarity with electric vehicle, and the solution that can be achieved between engine and vehicle wheel rotational speed is even, therefore machinery passes
The throttle of motor-car, which reduces (sliding), can use for reference the descending ancillary technique of electric vehicle.The executing agency of electric vehicle is accurate
Controllable, energy is recyclable, can store；Though Hydrostatic drive vehicle also possesses similar functions from principle, difficulty is implemented very
Greatly, the descending ancillary technique of electric vehicle therefore can not also be copied word by word.Hydrostatic drive vehicle is then without close research.
Utility model content
For above-mentioned present situation, the utility model provides a kind of Hydrostatic drive vehicle speed control system.The system is being transported to
Pressure sensor is set on the oil circuit of wheel motor, and motor is by conventional oil pump feed, by compensation pump repairing；Controller passes according to pressure
The situation of sensor, and the information of brake pedal and accelerator pedal make real-time adjustment to pump amount, with regulation speed.When throttle subtracts
When small (sliding) speed does not increase, using engine as driving, pump and engine is not allowed to provide resistance as control purpose；When throttle subtracts
During small (sliding) speed increase, allow pump and engine to provide certain brake force, do not allow speed increase as control purpose.
The concrete technical scheme that the utility model is taken is as follows：A kind of Hydrostatic drive vehicle speed control system, it is special
Sign is：Including engine, variable pump, variable displacement motor, gearbox, wheel, slippage pump, pressure sensor, brake pedal, acceleration
Pedal, controller；
The engine is connected with variable pump and slippage pump Mechanical Driven simultaneously；
The variable pump is connected with variable displacement motor hydraulic-driven, and slippage pump is arranged on the liquid between variable pump and variable displacement motor
Press oil on road；
The variable displacement motor mechanically connects with gearbox, and the gearbox mechanically connects with wheel；
The pressure sensor is arranged on the hydraulic circuit of variable pump, detects the oil pressure of oil circuit；
The engine, variable pump, variable displacement motor, pressure sensor, brake pedal, accelerator pedal are electrically connected with controller
Connect.
Further, the slippage pump is connected respectively to the fuel-displaced hydraulic circuit of the variable pump by two oil circuits and returned
On oily hydraulic circuit, and the first check valve and the second check valve are set respectively on two oil circuits.
Further, the oil circuit of the variable pump and slippage pump is connected to hydraulic oil container by overflow valve.
Further, the controller collection engine, variable pump, variable displacement motor, pressure sensor, braking are stepped on
The electric signal of plate, accelerator pedal, and control command is sent to engine, variable pump, variable displacement motor.
Compared with the prior art, the utility model significantly has the beneficial effect that：
1st, by adjust the speed of motor and pump than (motor does not become because adjusting the swash plate angle of pump all the time, they two
Speed also ceaselessly becoming), can solve accelerator pedal and the linear control strategy of pump swash plate angle causes vehicle
The problem of can not being slided using itself kinetic energy, energy loss is reduced, improve the economy of vehicle.
2nd, keep speed not increase by adjusting the fast ratio of motor and pump during vehicle descending, reduce vehicle descending mistake
Because of the danger that being continuously increased and triggering of deadweight speed in journey, the security of vehicle is improved.
Brief description of the drawings
Accompanying drawing is only used for showing the purpose of specific embodiment, and is not considered as to limitation of the present utility model, whole
In accompanying drawing, identical reference symbol represents identical part.
Fig. 1 is the utility model Hydrostatic drive vehicle speed control system figure.
Embodiment
The utility model is described in detail with reference to the accompanying drawings and examples, drawings and examples are only used for explaining
The utility model, it will be appreciated by those skilled in the art that, this is not the unique restriction made to technical solutions of the utility model,
Every any equivalents done under technical solutions of the utility model Spirit Essence or change, are regarded as belonging to this practicality
New protection domain.
Fig. 1 show the speed control system figure of the utility model Hydrostatic drive vehicle, and the system includes engine 1, become
Measure pump 2, the first check valve 3, the second check valve 4, variable displacement motor 5, gearbox 6, wheel 7, slippage pump 8, the first overflow valve 9, the
Two overflow valves 10, the 3rd overflow valve 11, hydraulic oil container 12, pressure sensor 13, brake pedal 14, accelerator pedal 15, controller
16.Executing agency includes engine 1, variable pump 2, the first check valve 3, the second check valve 4, variable displacement motor 5, gearbox 6, wheel
7th, slippage pump 8, controlling organization include brake pedal 14, accelerator pedal 15, controller 16.
Engine 1 is connected with variable pump 2 and slippage pump 8, transmits moment of torsion, and variable pump 2 is connected with variable displacement motor 5.Engine 1
It is used to provide driving force to vehicle in driving, the kinetic energy of engine 1 is changed into hydraulic energy in driving and passed to by variable pump 2
Variable displacement motor 5 provides power to vehicle, and certain moment of resistance is provided for driving engine 1 to rotate to be vehicle in braking.Mend
It when overflow occurs in system is in time system repairing that the effect of oil pump 8, which is, avoids occurring in system have gas in negative pressure and oil circuit.
Hydraulic energy of the variable displacement motor 5 in driving for pump conveying to be come is converted into kinetic energy and passes to gearbox 6, finally acts on car
On wheel 7, it is taken as hydraulic pump to use again during braking and throttle reduce (sliding), the kinetic energy of car body is changed into hydraulic energy,
Finally drive the operating of engine 1 to reach consumption frame energy, make the purpose of vehicle reduction of speed.Pressure sensor 13 starts for measurement
Pressure during machine forward drive in pump high-pressure oil pipe.Controller 16 is used to gather brake pedal 14, accelerator pedal 15, pressure sensing
The signal of device 13, variable pump 2 and variable displacement motor 5, the driving intention of driver is analyzed, formulated and driven according to the driving intention of driver
Dynamic and braking moment, and send control signals to pump and motor.Three overflow valves are attached separately on three oil circuits, are connected to liquid
Press oil case 12.
There is control logic in controller 16, vehicle accelerator provided by the utility model reduces the control of (sliding) speed,
Performed by the control logic in controller, including reduce the speed control and vehicle cunning when (or sliding) speed does not increase to throttle
The aspect of control two during row process medium velocity increase：
First, speed control when speed does not increase during throttle reduction (sliding)
Now main or motor-powered vehicle walking, pump and engine is not allowed simply to provide the mesh that resistance is control
's.
During vehicle advances, when controller detects that accelerator open degree reduces and speed does not increase (constant speed or reduction of speed),
The oil inlet and oil-out differential pressure signal Δ P that controller query interface pump first providespumpChange and pressure sensor provide
Hydraulic oil pipeline in pressure signal PsenseChange (Δ PpumpMeasured and calculated by the sensor and controller of pump itself,
And entire car controller can be reported, but he only reports pressure differential, does not know which side pressure of oil inlet and oil-out is high, so adding
Pressure in one sensor measurement pressure duct, for confirmation is driving or dragging state)：
(1) as Δ PpumpDuring being decreased to zero and Δ Ppump(Δ P during equal to zeropumpHave not equal to zero explanation engine
Drive/brake force, equal to the zero no driving force of explanation), variable pump still presses drive control policy control：Variable pump swash plate angle is with adding
Linear (direct proportion) relation of speed pedal aperture, i.e., system acting now is that throttle reduces, and variable pump swash plate angle also reduces.
(2) as Δ Ppump(now illustrate that driving condition is changed, it may be possible to brake (descending, car when being further added by by zero
Pump and engine the more run the more fast in tow), it is also possible to drive (speed the more drops the more low, and engine accelerates with pump driving car)), this
When judge PsenseChange：
A)Psense>When 0, variable pump presses drive control policy control (Psense>0 illustrates forward drive)；
B)PsenseWhen=0, Δ P is keptpumpVariable pump swash plate angle (P during equal to zerosense=0 illustrates reversely to make
It is dynamic).
2nd, the speed control during throttle reduction (sliding) during speed increase
Descending is now should be, allows pump and engine to provide certain brake force, it is the purpose controlled not allow speed increase.
During vehicle advances, while controller detects that accelerator open degree reduces during speed increase, inquiry first becomes
Measure oil inlet and oil-out pressure differential Δ P that pump providespumpThe pressure signal P that signal intensity and pressure sensor providesenseBecome
Change：
(1) as Δ PpumpDuring being decreased to zero, variable pump still presses drive control policy control；
(2) as Δ PpumpDuring equal to zero, now judge to perform：
A) if accelerator pedal aperture is not zero, now still to accelerate, engine power only maintains certainly the intention of driver
The operating of body, no longer drives, and should now allow vehicle to accelerate, and now engine returns idling, and variable pump swash plate angle is with Δ
PpumpChange ensures Δ PpumpIt is zero；
B) if accelerator pedal aperture is zero, now the speed that is intended to of driver does not increase, Δ PpumpCar during equal to zero
Speed will not increase, so when keep variable pump original swash plate angle, engine not oil spout is suitably counter to drag；
(3) as Δ PpumpDuring being further added by by zero, P is now judgedsenseChange：
A)Psense>When 0, illustrate that engine is in driving condition again, now variable pump should keep swash plate angle constant；
B)PsenseWhen=0, by adjusting the swash plate angle of variable pump, keep the flow of variable pump constant；When engine turns
When speed be higher than some value (this self-defined value, for example, for maximum speed 80%), stopping engine oil spout, work as engine speed
Recover oil spout during less than this value.
It is described above, the only preferable embodiment of the utility model, but the scope of protection of the utility model is not
This is confined to, any one skilled in the art can readily occur in the technical scope that the utility model discloses
Change or replacement, should all cover within the scope of protection of the utility model.
Claims (4)
- A kind of 1. Hydrostatic drive vehicle speed control system, it is characterised in that：Including engine (1), variable pump (2), variable horse Up to (5), gearbox (6), wheel (7), slippage pump (8), pressure sensor (13), brake pedal (14), accelerator pedal (15), control Device (16) processed；The engine (1) while it is connected with variable pump (2) and slippage pump (8) Mechanical Driven；The variable pump (2) is connected with variable displacement motor (5) hydraulic-driven, and slippage pump (8) is arranged on variable pump (2) and variable displacement motor (5) on the hydraulic circuit between；The variable displacement motor (5) mechanically connects with gearbox (6), and the gearbox (6) mechanically connects with wheel (7)；The pressure sensor (13) is arranged on the hydraulic circuit of variable pump (2)；The engine (1), variable pump (2), variable displacement motor (5), pressure sensor (13), brake pedal (14), accelerator pedal (15) electrically connected with controller (16).
- 2. Hydrostatic drive vehicle speed control system according to claim 1, it is characterised in that：The slippage pump (8) is logical Two oil circuits are crossed to be connected respectively on the fuel-displaced hydraulic circuit and oil return hydraulic circuit of the variable pump (2), and at described two First check valve (3) and the second check valve (4) are set respectively on oil circuit.
- 3. Hydrostatic drive vehicle speed control system according to claim 1 or 2, it is characterised in that：The variable pump (2) Hydraulic oil container (12) is connected to by overflow valve with the oil circuit of slippage pump (8).
- 4. Hydrostatic drive vehicle speed control system according to claim 1, it is characterised in that：The controller (16) is adopted Collect the engine (1), variable pump (2), variable displacement motor (5), pressure sensor (13), brake pedal (14), accelerator pedal (15) electric signal, and control command is sent to engine (1), variable pump (2), variable displacement motor (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720389620.8U CN206765818U (en) | 2017-04-13 | 2017-04-13 | A kind of Hydrostatic drive vehicle speed control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720389620.8U CN206765818U (en) | 2017-04-13 | 2017-04-13 | A kind of Hydrostatic drive vehicle speed control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206765818U true CN206765818U (en) | 2017-12-19 |
Family
ID=60630615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720389620.8U Expired - Fee Related CN206765818U (en) | 2017-04-13 | 2017-04-13 | A kind of Hydrostatic drive vehicle speed control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206765818U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114458820A (en) * | 2022-02-15 | 2022-05-10 | 中船动力研究院有限公司 | Valve control device applied to waste gas treatment system |
| CN115352419A (en) * | 2022-08-23 | 2022-11-18 | 中国人民解放军陆军装甲兵学院 | Hydraulic control system and method for snow pressing vehicle capable of recycling braking energy |
-
2017
- 2017-04-13 CN CN201720389620.8U patent/CN206765818U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114458820A (en) * | 2022-02-15 | 2022-05-10 | 中船动力研究院有限公司 | Valve control device applied to waste gas treatment system |
| CN115352419A (en) * | 2022-08-23 | 2022-11-18 | 中国人民解放军陆军装甲兵学院 | Hydraulic control system and method for snow pressing vehicle capable of recycling braking energy |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171219 Termination date: 20190413 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |