CN1128073C - Electrically controlled hydraulic vehicle with individual drive and brake of wheels and recovery of braking energy - Google Patents
Electrically controlled hydraulic vehicle with individual drive and brake of wheels and recovery of braking energy Download PDFInfo
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- CN1128073C CN1128073C CN 01134128 CN01134128A CN1128073C CN 1128073 C CN1128073 C CN 1128073C CN 01134128 CN01134128 CN 01134128 CN 01134128 A CN01134128 A CN 01134128A CN 1128073 C CN1128073 C CN 1128073C
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Abstract
The present invention relates to an electric control hydraulic vehicle with independent drive and brake by vehicle wheels and braking energy recover. The present invention is characterized in that an engine, a hydraulic accumulator, etc. are installed on a vehicle frame, each vehicle wheel is provided with a bidirectional variable displacement hydraulic motor, the engine is connected with a hydraulic pump, the hydraulic pump and the bidirectional variable displacement hydraulic motors are respectively connected with the hydraulic accumulator through hydraulic pipelines, an electronic control unit receives sensor signals of the angular velocity of each vehicle wheel, the position of the throttle pedal, the position of the braking pedal, the rotary speed of the engine, the pressure of the hydraulic accumulator, etc., and the electronic control unit is also used for controlling the operation of the engine and controlling the bidirectional variable displacement hydraulic motors through high-speed electromagnetic switch valves. In the present invention, the working conditions of the engine are not related to the resistance load of the vehicle, the displacement is reduced, and the engine is ensured to work in the optimum economic performance area most of the time; meanwhile, the braking energy recover can be realized, the economical efficiency of the vehicle is obviously increased, the harmful matter exhaust is reduced, the accelerating and braking performance, the maneuvering stability, the active safety, the mobility and the cross-country performance of the vehicle are improved, the structure is simplified, and the dead weight and the manufacturing cost are reduced.
Description
One, affiliated technical field
The present invention relates to a kind of vehicle (automobile, motor bike etc.), particularly a kind of wheel individual drive braking and the electrically controlled hydraulic vehicle with individual drive that reclaims braking energy.
Two, background technology
The conventional vehicles type of drive is mainly mechanical drive, also have electric tramsmission, hydraulic transmission and hydrostatic drive and mixed drive mode in addition, the kinetic energy of vehicle dissipates with the form of heat energy in braking procedure, and each wheel generally can't be realized independently driving or braking.Hydrostatic drive has high power/weight ratio, can carry out characteristics such as infinite speed variation, makes it have the potentiality of using in vehicle, but has problems such as efficient is not high, reliability is relatively poor.The solution of these problems not only depends on the fusion of the raising of Hydraulic Elements designing and manufacturing level, electric liquid technology and system optimization etc., and more crucial is change and the breakthrough that novelty will be arranged on system architecture and principle of work.
In recent years, though the research of hydrostatic drive vehicle is far from the research of electric tramsmission and relevant mixed drive vehicle active like that, also have the how tame units of state such as U.S., moral, day to carry out correlative study.For example, Tokyo polytechnical university [middle pool is abundant etc.A Constant Pressure Drive System forEngine-Flywheel Hybrid Vehicles. oil pressure と air is pressed.1996,27 (7)] proposed the bus design plan that a kind of hydrostatic drive combines with the mechanical flywheel accumulation of energy, the analogue computing result shows can have good result at aspects such as reducing fuel oil consumption.All there is the report of using power hydraulic system in Germany at aspects such as public transit vehicle, walking machine and field machines, German Linkoeping university did about the summary of Application of hydrostatic drive in walking machine and to the prediction of its development tendency.Domestic have how tame unit to carry out development and correlative study to battery-driven car at present, only there is Harbin Institute of Technology to do a few thing for the hydrostatic drive vehicle, but do not propose new scheme, do not develop real vehicle yet, only external existing program has been carried out analogue computing and theoretical analysis.
The eighties initial stage has proposed a kind of power hydraulic system of being made up of variable hydraulic motor and energy storage that is connected in the level pressure network by German scholar, is referred to as level pressure network HM Hydraulic Motor control system (being called secondary regulation system again).This type systematic is owing to advantages such as its capacity usage ratio height, suitable multi-load parallel connection have obtained increasing concern and extensive studies and application, and this also is a part important in the theoretical basis of new electronic control hydraulic vehicle with individual drive.This digital control element of high-speed solenoid valve is as the bridge between computing machine and the controlled object, be high frequency sound, the critical elements in the electrohydraulic control system cheaply, its manufacturing technology and use is greatly developed in recent years, for the realization of new electronic control hydraulic vehicle with individual drive provides precondition.Eltec and development of computer, the proposition of emerging electrohydraulic control system and in-depth study, the development of modern control theory, the performance of critical elements such as high-speed solenoid valve improves, these some be mechanical-electrical-hydraulic integration succeeding in developing of electrically controlled hydraulic vehicle with individual drive assurance is provided.In the research that improves vehicle dynamics characteristics, modern control theory has also obtained more application in recent years, but the device of practicability or parts then often are difficult to obtain popularization owing to reasons such as complexity, cost height too.
Three, summary of the invention
The object of the present invention is to provide a kind of mechanical-electrical-hydraulic integration, the wheel individual drive is braked and can be reclaimed braking energy, can significantly improve performances such as vehicle economy, dynamic property and discharging, work efficiency and reliability height, simple wheel individual drive braking of system architecture and the electrically controlled hydraulic vehicle with individual drive that reclaims braking energy.
The technical solution that realizes the object of the invention is: a kind of wheel individual drive braking and the electrically controlled hydraulic vehicle with individual drive that reclaims braking energy, comprise vehicle frame, wheel, it is characterized in that: driving engine, hydraulic accumulators etc. are installed on the vehicle frame, HM Hydraulic Motor all is set on each wheel, driving engine is connected with Hydraulic Pump, Hydraulic Pump is connected with hydraulic accumulator by hydraulic tubing respectively with each HM Hydraulic Motor, ECU (Electrical Control Unit) receives angular speed of wheel, accelerator pedal position, brake pedal position, engine speed, sensor signals such as hydraulic accumulator pressure, and control the running of driving engine and pass through high-speed solenoid valve modulated pressure motor.
Principle of work of the present invention is: Hydraulic Pump directly is connected with driving engine, by Engine driven Hydraulic Pump, when needed for hydraulic accumulator provides high pressure oil, by ECU (Electrical Control Unit) control driving engine intermittent use in optimal economic performance zone or optimum discharge performance zones and near.One two-way variable hydraulic motor all is housed on each wheel, ECU (Electrical Control Unit) is controlled in real time respectively by high-speed solenoid valve and is regulated turning to and flow of each HM Hydraulic Motor, when driving, provide high pressure oil by hydraulic accumulator, torque actuated HM Hydraulic Motor and wheel with required are converted to high pressure oil with kinetic energy by HM Hydraulic Motor at glancing impact and deposit hydraulic accumulator in.Transmission system (comprising change speed gear box, drive axle etc.), the brake system of cancellation conventional truck are realized incorporate design and control.
The present invention compared with prior art, its remarkable advantage is: engine operating condition and vehicle drag load are irrelevant substantially, and can guarantee that most time services are in optimal economic performance zone, can realize the recovery of braking energy, simultaneously since quicken with short-term high load capacity operating mode by driving engine and hydraulic accumulator while energy supply, vehicle can be adorned uses than small displacement engine, will significantly improve vehicle economy, for example be used for incity, city public transit vehicle, can save energy more than 30%.And can significantly reduce noxious emission, help environmental protection.By controlling turning to and flow of each HM Hydraulic Motor respectively in real time, can improve vehicle dynamics characteristics, comprise acceleration and deceleration and stopping performance, road-holding property etc.The raising of vehicle dynamics characteristics will be of value to the raising of vehicle active safety and manoevreability, cross-country traveling ability etc.Can cancel the plurality of sub system of conventional truck, be to conventional truck than great change, help simplified structure and reduce deadweight, reduce manufacturing cost simultaneously and enhance competitiveness.
Four, description of drawings
Accompanying drawing is wheel individual drive braking of the present invention and the structural representation that reclaims the electrically controlled hydraulic vehicle with individual drive of braking energy.
Five, the specific embodiment
In conjunction with the accompanying drawings, wheel individual drive braking of the present invention is driven bus with the automatically controlled liquid that reclaims braking energy, it is characterized in that: driving engine 4 (selecting diesel engine for use), hydraulic accumulator 6 (selecting the air sac hydraulic accumulator for use) etc. is installed on the vehicle frame 8, on each wheel 3 bidirectional variable HM Hydraulic Motor 2 is set all, driving engine 4 is connected with Hydraulic Pump 5 (selecting fix-displacement pump for use), Hydraulic Pump 5 is connected with hydraulic accumulator 6 by hydraulic tubing 7 respectively with each HM Hydraulic Motor 2 (selecting the bidirectional variable HM Hydraulic Motor for use), ECU (Electrical Control Unit) 1 receives angular speed of wheel, accelerator pedal position, brake pedal position, engine speed, sensor signals such as hydraulic accumulator pressure, and control the running of driving engine and control and regulate turning to and flow of each HM Hydraulic Motor respectively by high-speed solenoid valve, when driving, provide high pressure oil by hydraulic accumulator, torque actuated HM Hydraulic Motor and wheel with required are converted to high pressure oil with kinetic energy by HM Hydraulic Motor at glancing impact and deposit hydraulic accumulator in.The diesel engine discharge capacity can reduce 30-50% than conventional vehicles.The operation pressure of hydraulic efficiency pressure system is 20-30Mpa.Transmission system (comprising change speed gear box, drive axle etc.), the brake system of cancellation conventional truck.Further also steering system and suspension partly can be incorporated system, realize incorporate design and control.Because engine swept volume reduces, and can guarantee most time services in optimal economic performance zone, can realize the recovery of braking energy simultaneously, will significantly improve vehicle economy and improve emission behavior.
The present invention also can be used for vehicles such as cross country car, motor bike.
Claims (3)
1, a kind of wheel individual drive braking and the electrically controlled hydraulic vehicle with individual drive that reclaims braking energy, comprise vehicle frame [8], wheel [3], it is characterized in that: driving engine [4], hydraulic accumulator [6] etc. is installed on the vehicle frame [8], HM Hydraulic Motor [2] all is set on each wheel [3], driving engine [4] is connected with Hydraulic Pump [5], Hydraulic Pump [5] is connected with hydraulic accumulator [6] by hydraulic tubing [7] respectively with each HM Hydraulic Motor [2], ECU (Electrical Control Unit) [1] receives angular speed of wheel, accelerator pedal position, brake pedal position, engine speed, sensor signals such as hydraulic accumulator pressure, and control the running of driving engine [4] and pass through high-speed solenoid valve modulated pressure motor [2].
2, wheel individual drive braking according to claim 1 and the electrically controlled hydraulic vehicle with individual drive that reclaims braking energy, it is characterized in that: HM Hydraulic Motor [2] adopts the bidirectional variable HM Hydraulic Motor, turning to flow of HM Hydraulic Motor is all variable, and turning to of HM Hydraulic Motor can be different each other with flow on each wheel, controlled in real time and independent regulation by ECU (Electrical Control Unit) as required.
3, according to described wheel individual drive braking of claim 1 and the electrically controlled hydraulic vehicle with individual drive that reclaims braking energy, it is characterized in that: driving engine [4] adopts than small displacement engine, the combination of driving engine and Hydraulic Pump is intermittent use as required, quicken with short-term high load capacity operating mode by driving engine and hydraulic accumulator while energy supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01134128 CN1128073C (en) | 2001-10-31 | 2001-10-31 | Electrically controlled hydraulic vehicle with individual drive and brake of wheels and recovery of braking energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01134128 CN1128073C (en) | 2001-10-31 | 2001-10-31 | Electrically controlled hydraulic vehicle with individual drive and brake of wheels and recovery of braking energy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1363479A CN1363479A (en) | 2002-08-14 |
| CN1128073C true CN1128073C (en) | 2003-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 01134128 Expired - Fee Related CN1128073C (en) | 2001-10-31 | 2001-10-31 | Electrically controlled hydraulic vehicle with individual drive and brake of wheels and recovery of braking energy |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1242891C (en) * | 2002-11-08 | 2006-02-22 | 刘艳阳 | Unilization device of car brake energy and wheel vibration energy |
| DE102005060340A1 (en) * | 2005-12-16 | 2007-06-21 | Bosch Rexroth Ag | Vehicle braking method for controlled braking on a motor vehicle uses a hydrostatic traveling mechanism (HTM) with swiveling hydraulic motors linked to the HTM's axle and driven by a hydraulic pump |
| DE102006042390A1 (en) * | 2006-06-02 | 2007-12-06 | Brueninghaus Hydromatik Gmbh | Drive with energy storage device and method for storing kinetic energy |
| CN101456409B (en) * | 2007-12-13 | 2012-07-25 | 比亚迪股份有限公司 | Vehicle energy recovery apparatus and method |
| CN201395054Y (en) * | 2009-04-28 | 2010-02-03 | 武振芳 | Hydraulic driving vehicle |
| CN101900192B (en) * | 2010-06-02 | 2013-06-19 | 宁波高新协力机电液有限公司 | Power dividing energy regenerated hydraulic mechanical stepless gearbox for hybrid electric vehicle |
| CN103171427A (en) * | 2011-12-23 | 2013-06-26 | 王勇 | Vehicle hydraulic power system |
| CN102848909A (en) * | 2012-09-29 | 2013-01-02 | 吴亚利 | Automobile electronic-control hydraulic independent shaft end driving system |
| CN103009987B (en) * | 2012-12-03 | 2015-08-05 | 浙江工业大学 | A kind of parallel hydraulic battery-driven car regenerative braking energy reclaiming system |
| CN103552472B (en) * | 2013-09-19 | 2015-09-30 | 南京理工大学 | Non-rice habitats stroke-increasing electric automobile regenerative braking method |
| CN107253438A (en) * | 2017-04-17 | 2017-10-17 | 北京长城华冠汽车科技股份有限公司 | The four-wheel drive system and hybrid vehicle of a kind of hybrid vehicle |
| CN107310371B (en) * | 2017-06-13 | 2019-06-25 | 南京理工大学 | A kind of liquid-driving mixed power system of independent Direct wheel drives |
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2001
- 2001-10-31 CN CN 01134128 patent/CN1128073C/en not_active Expired - Fee Related
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| CN1363479A (en) | 2002-08-14 |
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