CN101774351A - Hydraulic hybrid vehicle flexible braking device - Google Patents
Hydraulic hybrid vehicle flexible braking device Download PDFInfo
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- CN101774351A CN101774351A CN201010300571A CN201010300571A CN101774351A CN 101774351 A CN101774351 A CN 101774351A CN 201010300571 A CN201010300571 A CN 201010300571A CN 201010300571 A CN201010300571 A CN 201010300571A CN 101774351 A CN101774351 A CN 101774351A
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Abstract
The invention relates to a hydraulic hybrid vehicle flexible braking device. A pressure sensor and a pressure sensing energy accumulator are connected in series between a brake pedal and a brake main cylinder of the main structure thereof, the brake pedal acts to cause oil to flow, the flow is diverted to the pressure sensing energy accumulator and enters into the brake main cylinder via a controllable throttle valve, to construct a flexible connection between the brake pedal and the brake main cylinder. An energy accumulator pressure signal subject to signal conversion of the brake pedal of a driver is collected to be sent into a brake controller to be used for controlling the hydraulic regenerative braking and friction braking of the vehicle to work cooperatively, and integrating braking work, brake signal collection and control functions. The pressure sensing energy accumulator can feed vivid brake pedal operating force sense back to the driver. The invention not only has the function of collecting intention signal of the driver to control checking brake, but also has operating sense, the brake signal is sent to the vehicle driving main control unit in the form of electrical signal, thus realizing vehicle brake strategy coordination and energy management control.
Description
Technical field
The present invention relates to a kind of vehicle breaking operation and control technology, specifically a kind of hydraulic hybrid vehicle flexible braking device that is used for.
Background technology
We know that the service brake of conventional truck is handled, and steps on brake pedal by chaufeur and realizes brake operating.Brake pedal directly links to each other with master brake cylinder (hydrostatic drive), brake lever (rod-type and drag-line transmission) or brake control valve (air pressure or hydraulic power brake).Chaufeur is directly used in the size of control (friction) braking force to the operation of brake pedal, and chaufeur is regulated the vehicle braked process by the sensation feedback to the speed of a motor vehicle.
In recent years, hybrid vehicle technology becomes the research and development focus of each big car company.Motor vehicle driven by mixed power is meant and adopts the vehicle of two or more engine installations as the drive energy of vehicle.Often be divided into hydraulic hybrid and electric and hybrid vehicle.In electric and hybrid vehicle, the brake pedal of driver's operation is connected with electric signal with energy recycle device and control setup (or controller) and transmits, and is connected with friction brake indirectly.In hydraulic hybrid power vehicles, as driving power element, realize horsepower output and torque control by regulating discharge capacity by hydraulic pump/motor.
The principle of work of hydraulic hybrid power vehicles is: hydraulic pump/motor links to each other with change-speed box or vehicle bridge, accepts the high-pressure and hydraulic fluid effect from high pressure accumulator or main driving pump (constant pressure variable displacement pump), and being in the motor operating mode provides propulsive effort for vehicle.In car brakeing or descent run operating mode, hydraulic pump/motor works in the Hydraulic Pump operating mode, is dragged by inertia load, to system's feedback energy (regenerative brake), and is stored in the hydraulic accumulator with the form of high-pressure and hydraulic fluid, is used for driving next time.According to the connection mode of power system, hydraulic hybrid power vehicles is divided into tandem, parallel, series parallel type and wheel limit drive-type.
At present, the brake control device of hydraulic hybrid power vehicles mainly is made up of brake pedal, displacement pickup, controller and actuating unit, and wherein brake pedal and drg are for to be connected indirectly.The action of brake pedal changes electric signal into by displacement pickup delivers to vehicle control device (or brake controller), accept working condition signal by vehicle control device and handle calculating, and export control signal and give actr (energy storage braking element or regenerative brake element), thereby realize vehicle braked demand analysis and brake-power control (realizing regenerative brake or friction braking).In braking procedure, brake controller comes the braking intention (emergency braking, normal brake application, the slow braking of lower long slope etc.) of analysis and judgement chaufeur according to brake pedal movement range, speed, determines the size of braking torque; According to brake-power control and allocation strategy and the current wheelslip state set, distribute antero posterior axis braking torque (regenerative torque and friction braking torque).On function, the brake treadle mechanism (device) of external existing this hydraulic hybrid power vehicles, action is carried out in the analysis and the braking that have solved chaufeur braking intention, but, chaufeur is stepped in the course of action of brake pedal, lack the non-linear brake operating force feedback of conventional vehicles braking, thereby make chaufeur can not get the antagonistic force of brake pedal, be not easy to real-time feed back or react according to vehicle working condition, driver behavior has certain unusual sense, from driving the angle analysis of psychology, has certain hidden danger.
Summary of the invention
Technical matters to be solved by this invention is to overcome the deficiency that existing hydraulic hybrid brake operating device exists, provide a kind of rational in infrastructure, easy for operation, dependable performance, have speed-slackening signal collection and translation function, can carry out speed-slackening signal according to operating mode and regulate, the hydraulic hybrid vehicle flexible braking device that makes the brake operating of chaufeur have the sense of reality of braking force feedback.It is applicable to the handling device of hydraulic hybrid power vehicles (friction and regeneration) control of braking.
The technical scheme that the present invention solves the problems of the technologies described above employing is: a kind of hydraulic hybrid vehicle flexible braking device, include fluid reservoir, master brake cylinder, stop lamp switch, brake pedal, brake controller, it is characterized in that: between master brake cylinder and brake pedal, be provided with controllable throttle valve, pressure-sensitive energy storage, pressure sensor, brake piston; Described brake pedal directly links to each other with brake piston, and connects with pressure sensor, energy storage and master brake cylinder; The fluid that the brake pedal action causes flows, and the process controllable throttle valve enters the control plunger chamber and the pressure-sensitive energy storage of master brake cylinder, and the braking fluid subchannel that is flowed out by master brake cylinder enters each brake wheel cylinder; Pressure sensor links to each other with brake controller by electric signal, and brake controller is controlled the regenerative brake and the friction braking of vehicle according to pressure signal; Controllable throttle valve changes flow area by electric proportional control or electro-hydraulic servo control; The electric signal control controllable throttle valve of brake controller output is realized the hydraulic coupling control to the flow and the master brake cylinder of inflow pressure-sensitive energy storage.
The present invention adopts technique scheme, realizes the control of hydraulic hybrid power vehicles to the controllable throttle valve of brake equipment, main brake energy storage (high and low pressure energy storage), driving engine, hydraulic pump/motor.Like this, realize that not only transmission, analyzing and processing and the braking maneuver of speed-slackening signal carried out, and realized the force feedback of brake pedal.On function, not only has the chaufeur of collection brake operating intention signal, and then control vehicle slows down even the effect of parking, brake control signal and strength signal are delivered to vehicle ' main control unit (or entire car controller) with the form that pressure signal converts electric signal to, thereby vehicle is braked by predetermined control of braking strategy.The more important thing is, at brake pedal and master brake cylinder is flexible the connection, not only possessing signal takes place and transmitting function, and, the pressure of brake pedal action causing pressure-sensitive energy storage has non-linear characteristics because changing, chaufeur is had and the similar brake pedal force feedback sense of traditional braking operation, be convenient to realize to be the vehicle breaking operation and the feedback regulation operation control at center with the chaufeur.This flexible braking device is applicable to the chaufeur brake operating of hydraulic hybrid power vehicles more, is beneficial to drive and safety.Against existing technologies, compact conformation of the present invention is reasonable, and more perfect function has been eliminated the discomfort of everyday driver to existing hydraulic hybrid power vehicles brake operating, makes the chaufeur brake operating have the force feedback sense similar with conventional truck.
Description of drawings
The present invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is that the present invention forms structural representation.
Fig. 2 is the present invention's application implementation example schematic on the parallel hydraulic motor vehicle driven by mixed power.
Number in the figure is respectively: 1. fluid reservoir, 2. master brake cylinder, 3. controllable throttle valve, 4. pressure-sensitive energy storage, 5. pressure sensor, 6. brake piston, 7. stop lamp switch, 8. brake pedal, 9. brake controller, 10. friction brake, 11. wheels, 12. transmission shafts, 13. drive axle, 14. low pressure accumulators, 15. hydraulic pump/motors, 16. torque couplings, 17. change-speed box, 18. power-transfer clutchs, 19. electromagnetic switch valves, 20. driving engine, 21. high pressure accumulators, 22. front axles.
The specific embodiment
As can be seen from Figure 1, a kind of hydraulic hybrid vehicle flexible braking device of the present invention includes fluid reservoir 1, master brake cylinder 2, controllable throttle valve 3, pressure-sensitive energy storage 4, pressure sensor 5, brake piston 6, stop lamp switch 7, brake pedal 8, brake controller 9.
Described fluid reservoir 1 is used to store master brake cylinder 2 brakings liquid, the piston action of master brake cylinder 2 is actuated through the fluid in brake operating loop by the brake pedal 8 of driver's operation, and controllable throttle valve 3 is used for regulating the fluid flow in the working piston chamber that enters pressure-sensitive energy storage 4 and master brake cylinder 2.The pressure signal that pressure sensor 5 is used for the brake operating loop changes electric signal into.Described brake circuit by the working piston of brake piston 6, pressure-sensitive energy storage 4, controllable throttle valve 3, master brake cylinder 2 actuate the chamber and therebetween the bonded assembly hydraulic tubing form.Described pressure-sensitive energy storage 4 is in order to change the hydraulic coupling in it brake pedal 8 that feeds back to driver's operation.
Brake pedal 8 of the present invention is directly trampled operation by chaufeur.Operation brake pedal 8 drives stop lamp switch 7 work, realizes the back braking Warning light of vehicle is carried out switch control.Master brake cylinder 2 is identical with traditional braking handling device corresponding component and function with fluid reservoir 1.The present invention has increased the brake piston 6, pressure-sensitive energy storage 4, controllable throttle valve 3, pressure sensor 5 and the brake controller 9 that are series in this brake operating loop between brake pedal 8 and master brake cylinder 2.Wherein brake pedal 8 directly links to each other with brake piston 6, the action of driver's operation brake pedal 8 is flowed fluid, a part enters the control plunger chamber of master brake cylinder 2 through controllable throttle valve 3, another part charges in the pressure-sensitive energy storage 4, oil liquid pressure is raise, and this signal is delivered to brake controller 9 by pressure sensor 5.In this process, brake pedal 8 is also received the antagonistic force that causes from the oil liquid pressure nonlinearities change, and is similar to the treadle effort sense of traditional braking pedal.Said pressure-sensitive energy storage 4 usefulness are so that chaufeur is experienced the force feedback of brake operating.
Pressure sensor 5 links to each other with brake controller 9 by electric signal, and brake controller 9 links to each other with controllable throttle valve 3, can realize adjusting to the flow area of controllable throttle valve 3 by electric ratio or electro-hydraulic servo mode like this.Enter the fluid in the control plunger chamber of master brake cylinder 2 through controllable throttle valve 3, promote the pistons work of master brake cylinder 2, the braking liquid that promotes master brake cylinder 2 flows, and the braking fluid subchannel that is flowed out by master brake cylinder 2 enters each brake wheel cylinder of vehicle.Brake controller 9 is controlled the regenerative brake and the friction braking of vehicle according to pressure signal; Controllable throttle valve 3 changes flow area by control signal; The electric signal control controllable throttle valve 3 of brake controller 9 outputs, thus realize the flow of inflow pressure-sensitive energy storage 4 and the hydraulic coupling of master brake cylinder 2 are controlled.
Application example by Fig. 2 further specifies technical scheme of the present invention.Use the parallel hydraulic motor vehicle driven by mixed power of apparatus of the present invention, except that above-mentioned connectivity scenario, brake controller 9 is connected with the control setup of low pressure accumulator 14, high pressure accumulator 21, driving engine 20, hydraulic pump/motor 15, realizes that transmission, processing and the action of signal carried out.Two power transmission routes are here arranged, and one is that the power of driving engine 20 can drive rear driving axles 13 through power-transfer clutch 18, change-speed box 17 and coupler 16; Another power path is to drive hydraulic pump/motor 15 through torque couplings 16, when the power of driving engine 20 is more than needed under some operating mode, hydraulic pump/motor 15 is in the Hydraulic Pump operating mode, fluid can be extracted out from low pressure accumulator 14, charge into high pressure accumulator 21 through after the boost in pressure, the form of energy more than needed with high-voltage oil liquid stored.Imposing a condition down, this part energy can discharge again to vehicle provides power, realizes energy recovery and utilization again.Simultaneously, pressure signal is delivered to after the brake controller 9, judge and computing through program, the fuel charge of driving engine 20, the quantitative control electromagnetic valve of hydraulic pump/motor 15, the aperture of controllable throttle valve 3 and the switch of electromagnetic switch valve 19 are controlled by setting pattern output electric signal.
In damped condition, brake piston 6 main absorption chaufeurs are trampled the energy of brake pedal 8, produce brake fluid pressure, and this pressure signal is delivered to brake controller 9 through pressure sensor 5; Energy storage 4 is stored hydraulic part; Pressure sensor 5 is used for the size of perception chaufeur brake pedal force; Controllable throttle valve 3 controls flow into the fluid flow in the working piston chamber of pressure-sensitive energy storage 4 and master brake cylinder 2, because this represents the pressure and the flow signal to system's demand braking force of chaufeur, control with brake operating so that give friction brake 10 simultaneously.When chaufeur was stepped on brake pedal 8, brake piston 6 left lateral promoted the part braking liquid and enter pressure-sensitive energy storage 4, the increased pressure in the pressure-sensitive energy storage 4 at this moment, and this pressure reacts on chaufeur by brake pedal 8, and chaufeur perception braking force is changed.
When the hydraulic braking energy-recuperation system is working properly, the acquired signal of system's detected pressures sensor 5, can calculate driver pedal force intensity (braking force, braking force rate of change), control of braking strategy according to system's formulation, regulate the aperture of hydraulic pump/motor 15 discharge capacities and controllable throttle valve 3, with control car load regenerative braking moment.These functions be the conventional brake pedal can not provide.
In sum, brake pedal 8 displacement signals are delivered to brake controller 9 with the form of oil liquid pressure signal.Brake pedal 8 is connected with vehicle braked master cylinder 2 no rod members or drag-line, but by the fluid transmission, and there have hydraulic accumulator 4 to be series to be middle, the effect of (electric ratio) controllable throttle valve 3 in addition, thus realized that the flexibility between brake pedal 8 and the master brake cylinder 2 connects.Place energy storage 4 pressure signals between brake pedal 8 and the master brake cylinder 2, as control of braking acquired signal and strength demand signal.Brake controller 9 is judged vehicle braked mode (distribution of hydraulic regenerative braking and friction braking) by vehicle current working and chaufeur braking requirement, thus the control brake actuating unit.
Claims (4)
1. hydraulic hybrid vehicle flexible braking device, include fluid reservoir, master brake cylinder, stop lamp switch, brake pedal, brake controller, it is characterized in that: between master brake cylinder and brake pedal, be provided with controllable throttle valve, pressure-sensitive energy storage, pressure sensor, brake piston, brake controller, described brake pedal is connected with brake piston, and connects with pressure sensor, energy storage and master brake cylinder; The fluid that the brake pedal action causes flows, and enters master brake cylinder control plunger chamber and pressure-sensitive energy storage through controllable throttle valve, and the braking fluid subchannel that is flowed out by master brake cylinder enters the front and back brake wheel cylinder; Pressure sensor links to each other with brake controller by electric signal, and brake controller is controlled the regenerative brake and the friction braking of vehicle according to pressure signal; Controllable throttle valve changes flow area by electric proportional control or electro-hydraulic servo control; The electric signal control controllable throttle valve of brake controller output, thus realize the flow of inflow pressure-sensitive energy storage and the hydraulic coupling of master brake cylinder are controlled.
2. hydraulic hybrid vehicle flexible braking device according to claim 1, it is characterized in that: said brake piston is arranged in a brake piston cylinder, brake piston is arranged in the brake operating loop, the fluid that directly promotes in this loop flows, and the action of brake pedal is converted into flowing of fluid.
3. hydraulic hybrid vehicle flexible braking device according to claim 1, it is characterized in that: the action of the working piston of master brake cylinder, the loop fluid that is caused by brake pedal action flows into the working piston chamber of master brake cylinder and actuates, and the flow of this part fluid is regulated by the controllable throttle valve aperture that regulated by brake controller, is getting in touch the action of driver's operation brake pedal and brake master cylinder piston.
4. hydraulic hybrid vehicle flexible braking device according to claim 1, it is characterized in that: the oil liquid pressure signal in the brake operating loop that brake controller collection brake pedal causes changes, and be connected with entire car controller and communicate by letter, realize that the control of the relevant power part of car load is coordinated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010300571A CN101774351A (en) | 2010-01-22 | 2010-01-22 | Hydraulic hybrid vehicle flexible braking device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010300571A CN101774351A (en) | 2010-01-22 | 2010-01-22 | Hydraulic hybrid vehicle flexible braking device |
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| CN101774351A true CN101774351A (en) | 2010-07-14 |
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| CN201010300571A Pending CN101774351A (en) | 2010-01-22 | 2010-01-22 | Hydraulic hybrid vehicle flexible braking device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102529920A (en) * | 2011-10-31 | 2012-07-04 | 北京信息科技大学 | Vehicle electro-hydraulic power brake system |
| CN104514771A (en) * | 2013-10-03 | 2015-04-15 | 卡特彼勒Sarl | Hydraulic accumulator pre-charge pressure detection for hydraulic braking system |
| CN110884356A (en) * | 2019-11-20 | 2020-03-17 | 台州学院 | Energy recovery device for automatic driving vehicle |
| CN112109687A (en) * | 2020-09-25 | 2020-12-22 | 湖北航天技术研究院特种车辆技术中心 | Composite brake control system |
-
2010
- 2010-01-22 CN CN201010300571A patent/CN101774351A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102529920A (en) * | 2011-10-31 | 2012-07-04 | 北京信息科技大学 | Vehicle electro-hydraulic power brake system |
| CN102529920B (en) * | 2011-10-31 | 2014-03-26 | 北京信息科技大学 | Vehicle electro-hydraulic power brake system |
| CN104514771A (en) * | 2013-10-03 | 2015-04-15 | 卡特彼勒Sarl | Hydraulic accumulator pre-charge pressure detection for hydraulic braking system |
| CN110884356A (en) * | 2019-11-20 | 2020-03-17 | 台州学院 | Energy recovery device for automatic driving vehicle |
| CN110884356B (en) * | 2019-11-20 | 2021-06-08 | 台州学院 | Energy recovery device for automatic driving vehicle |
| CN112109687A (en) * | 2020-09-25 | 2020-12-22 | 湖北航天技术研究院特种车辆技术中心 | Composite brake control system |
| CN112109687B (en) * | 2020-09-25 | 2021-07-06 | 湖北航天技术研究院特种车辆技术中心 | Composite brake control system |
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Open date: 20100714 |