CN201970842U - Hydraulic combination driving system for cascade machine - Google Patents
Hydraulic combination driving system for cascade machine Download PDFInfo
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- CN201970842U CN201970842U CN2011200767496U CN201120076749U CN201970842U CN 201970842 U CN201970842 U CN 201970842U CN 2011200767496 U CN2011200767496 U CN 2011200767496U CN 201120076749 U CN201120076749 U CN 201120076749U CN 201970842 U CN201970842 U CN 201970842U
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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Abstract
The utility model discloses a hydraulic combination driving system for a cascade machine, comprising a hydraulic free piston engine, a hydraulic motor, a main speed reducer and wheels. A high-pressure hydraulic oil output end of the hydraulic free piston engine is connected with a high-pressure oil input end of the hydraulic motor by a high-pressure hydraulic hose, a low-pressure oil suction end of the hydraulic free piston engine is connected with a return opening of the hydraulic motor by a hydraulic oil pipe, and an output shaft of the hydraulic motor is connected with the main speed reducer which is connected with the wheels. Due to the adoption of the technical scheme, the running condition of a vehicle power system can be optimized, and the purpose of saving energy and reducing emission is achieved.
Description
Technical field
The utility model relates to the vehicular drive technical field, relates in particular to a kind of cascade machine liquid hybrid drive system.
Background technology
Along with growing with each passing day of automobile pollution, the problem of energy shock and ecological deterioration is increasingly serious, and automobile energy-saving technology and emission-reduction technology have been proposed more urgent demand.People are making great efforts the energy-conservation low row's engine installation of development of new on the one hand, on the one hand existing engine installation are optimized and make up, and reach the effect of energy-saving and emission-reduction.
Combination drive is exactly that a kind of the utilization has a kind of new type of drive that engine installation reconfigures the back generation now.Common combination drive form has at present: machine-electricity mixes and machine-several forms such as liquid mixing, wherein, it is that driving engine is realized combination drive with electrical motor by different connection modes that machine-electricity mixes, machine-liquid combination drive is that driving engine is realized combination drive with hydraulic pump/motor by different connection modes, hybrid power adopts two kinds of dissimilar propulsions source, performance advantage separately can provide good space to energy-saving and emission-reduction respectively.
For machine-liquid combination drive, advantage such as have that power density height, braking energy reclaim easily, the flexible hydraulic power transmission can realize eliminating engine idling condition receives insider's concern gradually.At present, each big car company of the world is all released dissimilar machines-hydraulic hybrid type power vehicle.Traditional machine-liquid hybrid mode has series connection, parallel connection and three kinds of different arrangements of series-parallel connection, but, no matter be which kind of arrangement, all be with conventional engines with whole power or part transmission of power to Hydraulic Pump, Hydraulic Pump provides the hydraulic pressure can be as part or all power of powered vehicle power, machine-liquid combination drive for traditional driving engine-Hydraulic Pump formula, its power delivery mode and transfer route are: the heat energy that fuel combustion produces promotes the crank motion of piston, the crank motion of piston is converted into rotatablely moving of bent axle by piston crank mechanism, to rotatablely move by power transmission shaft and to be delivered to the input shaft of Hydraulic Pump, Hydraulic Pump drives the swash plate body rotation under the drive of moment of rotation, the crank motion that is converted into plunger once more with rotatablely moving is realized the output of hydraulic pressure energy, the centre repeatedly transforms crank motion by piston crank mechanism and swash plate body, causes messenger chain too tediously long, efficient is low, shortcomings such as complex structure.
The utility model content
The purpose of this utility model is to propose a kind of cascade machine liquid hybrid drive system, can optimize the automotive power operating condition, reaches the purpose of energy-saving and emission-reduction.
For reaching this purpose, the utility model by the following technical solutions:
A kind of cascade machine liquid hybrid drive system, comprise hydraulic free-piston engine, HM Hydraulic Motor, main reduction gear and wheel, be connected by the high-pressure and hydraulic flexible pipe between the high pressure oil input end of the high-pressure and hydraulic of hydraulic free-piston engine oil mouth and HM Hydraulic Motor, be connected by hydraulic oil pipe between the low pressure oil absorbing end of hydraulic free-piston engine and the return opening of HM Hydraulic Motor, hydraulic motor output shaft is connected with main reduction gear, and main reduction gear is connected with wheel.
Also comprise high pressure accumulator, high pressure accumulator is linked into the high-pressure and hydraulic flexible pipe between the high pressure oil input end of the high-pressure and hydraulic oil mouth of hydraulic free-piston engine and HM Hydraulic Motor.
Also comprise low pressure accumulator, low pressure accumulator is linked into the hydraulic oil pipe between the return opening of the low pressure oil absorbing end of hydraulic free-piston engine and HM Hydraulic Motor.
HM Hydraulic Motor is a hydraulic pump motor.
Adopted the technical solution of the utility model, had the following advantages:
1, small size, low weight, combined efficiency height.Hydraulic free-piston engine has saved the piston crank mechanism that tradition is started, and has reduced the part number; Simultaneously, a plurality of parts such as power-transfer clutch in the conventional truck power drive system, change speed gear box, transmission shaft be can save, whole power system designs simplification, reduction in bulk, weight saving made.Reduce the transfer of energy link, improved combined efficiency.
2, hydraulic free-piston engine itself has efficient, oligosaprobic characteristics.Compare with the machine hydraulic hybrid type power of traditional internal combustion engine driving Hydraulic Pump, hydraulic free-piston engine has saved the piston crank mechanism that reciprocating motion of the pistons is converted into the crankshaft revolution motion, saved the straight-line rotating wobble plate mechanism that is converted into plunger with rotatablely moving in the pluger type hydraulic pump, reduced the part number greatly, internal combustion engine is not subjected to lateral pressure, has greatly reduced mechanical friction loss; The horsepower output of hydraulic free-piston engine is regulated and is adopted mode of frequency regulation to realize, thoroughly broken away from conventional engines by reducing the mode of Load Regulation power, and between propulsion source and load, carry out the power transmission by hydraulic efficiency pressure system, adopt energy storage as energy-storage travelling wave tube simultaneously, make and realize successful decoupling zero between the horsepower output of hydraulic free-piston engine and the vehicle load power, guaranteed that hydraulic free-piston engine all can move by optimizing performance curve, raises the efficiency under the full operating mode of vehicle; Realize the control of variable-compression work and cyclic process, not only can improve the efficient of combustion engine, and can be suitable for polytype fuel, even can use the unworkable heavy low-grade fuel of traditional combustion engine, make vehicle break away from oil-fired limitation.
3, braking and braking energy reclaim.Hydraulic free-piston engine can utilize the high advantage of hydraulic accumulator power density to realize that successfully braking energy reclaims by the monitoring of controlling traveling state of vehicle, change the energy storage braking into by traditional energy-consumption braking mode, improve the maintainability of brake system, reduced brake oil.
Description of drawings
Fig. 1 is the structural representation of cascade machine liquid hybrid drive system in the utility model specific embodiment.
The specific embodiment
Further specify the technical solution of the utility model below in conjunction with accompanying drawing and by the specific embodiment.
Machine-liquid hybrid drive system based on hydraulic free-piston engine belongs to machine-liquid combination drive category, be to utilize a kind of power driven mode of hydraulic free-piston engine as vehicle major impetus or auxiliary power, its power core is a hydraulic free-piston engine, hydraulic free-piston engine is that stroke piston combustion engine and pluger type hydraulic pump is integrated, it is a kind of novel machine hydraulic hybrid type power thought of design, according to the power system integrated conception, optimize the version of power drive system, the crank motion of internal combustion engine is converted into the pressure energy of liquid by rigidly connected plunger, about the principle of hydraulic free-piston engine referring to patent of invention: CN200810223401.8.
The utility model is that independent the travelling as the vehicle power source powered vehicle of hydraulic free-piston engine constituted tandem machine-liquid combination drive, and the high pressure liquid pressure energy that utilizes hydraulic free-piston engine output is by the rotation of hydraulic pump/motor drive wheels.The hydraulic free-piston engine power unit is relatively independent, power transmission is utilized the hydraulic pressure transmission, realized the flexibility layout of power system, effectively utilize vehicle space, adopt energy storage as energy-storage travelling wave tube, to realize successful decoupling zero between the horsepower output of hydraulic free-piston engine and the vehicle load power demand, guaranteed that hydraulic free-piston engine optimizes the performance curve operation by design-calculated, fuel economy and emission performance all improve.
Fig. 1 is the structural representation of cascade machine liquid hybrid drive system in the utility model specific embodiment.As shown in Figure 1, this cascade machine liquid hybrid drive system comprises hydraulic free-piston engine 1, HM Hydraulic Motor 4, main reduction gear 6, wheel 5, high pressure accumulator 7 and low pressure accumulator 3.
Be connected by high-pressure and hydraulic flexible pipe 8 between the high pressure oil input end P of the high-pressure and hydraulic of hydraulic free-piston engine oil output terminals A and HM Hydraulic Motor, high pressure accumulator is linked into the high-pressure and hydraulic flexible pipe between the high pressure oil input end of the high-pressure and hydraulic oil mouth of hydraulic free-piston engine and HM Hydraulic Motor, be connected by hydraulic oil pipe 2 between the low pressure oil absorbing end B of hydraulic free-piston engine and the oil return inlet T of HM Hydraulic Motor, low pressure accumulator is linked into the hydraulic oil pipe between the return opening of the low pressure oil absorbing end of hydraulic free-piston engine and HM Hydraulic Motor, hydraulic motor output shaft is connected with main reduction gear, HM Hydraulic Motor can be fixed in the vehicle main retarder front end, guarantee that hydraulic motor output shaft is connected with the power intake of main reduction gear, main reduction gear is identical with the conventional truck connection mode with the wheel connection mode.
In order to realize that braking energy reclaims, the HM Hydraulic Motor of employing is the hydraulic pump motor system, promptly can realize Hydraulic Pump and HM Hydraulic Motor handoff functionality, when using as HM Hydraulic Motor, for vehicle motor provides starting power.When using as Hydraulic Pump, be that the power of driving engine is driven the Hydraulic Pump rotation by belt pulley, Hydraulic Pump is stored in high pressure accumulator after with the low pressure oil pressurization, realizes energy recovery.
Hydraulic free-piston engine is converted into the high pressure liquid pressure energy by the output of high-pressure and hydraulic flexible pipe with the heat energy of fuel combustion, drives HM Hydraulic Motor, fluid motor-driven vehicle main retarder, and then drive wheels rotation, and powered vehicle is travelled.High pressure accumulator inserts in the high-pressure and hydraulic flexible pipe, guaranteed the pressure stability of the high-pressure and hydraulic oil of hydraulic free-piston engine output on the one hand, be used for storing energy on the other hand, low pressure accumulator inserts the hydraulic oil pipe of low pressure, empty in order to prevent the suction of hydraulic free-piston engine low pressure oil, to obtain best result of use.
This cascade machine liquid hybrid drive system working process is: hydraulic free-piston engine is converted into hydraulic pressure with the heat energy of fuel combustion and can externally exports, the high pressure liquid pressure energy of hydraulic free-piston engine output drives the HM Hydraulic Motor rotation, the rotation of fluid motor-driven vehicle main retarder, and then drive wheels rotation, can reach the adjusting of horsepower output by the discharge capacity of modulated pressure motor, to adapt to the different demands of vehicle to power system.
When vehicle stopped, the horsepower output of modulated pressure motor was zero, can realize that vehicle stops.
When needs reclaimed the vehicle braking energy, switching HM Hydraulic Motor was the Hydraulic Pump state, and main reduction gear towing astern Hydraulic Pump is realized energy recovery, and promptly Hydraulic Pump is converted into the high-pressure and hydraulic oil measure with low pressure oil and is stored in high pressure accumulator, finished braking energy and reclaimed function.
This cascade machine liquid hybrid drive system is compared with the machine-liquid combination drive of conventional engines-Hydraulic Pump formula, has reduced the multiple conversions of the mode of motion of traditional machine-hydraulic hybrid type power system, combined efficiency height, simple in structure.Can realize full decoupled between vehicle load power and the engine output in conjunction with the characteristics of hydraulic free-piston engine, utilize mode of frequency regulation to realize the power regulation of driving engine, guaranteed that driving engine is in optimum operating condition operation all the time, avoided traditional power system vehicle when low speed and load because the low deterioration of emission that causes of engine speed, defective such as less economical.Simultaneously, can realize functions such as stepless change, braking energy recovery, improve travelling comfort, reduce braking power consumption and noise.
The above; it only is the preferable specific embodiment of the utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with the people of this technology in the disclosed technical scope of the utility model; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claim.
Claims (4)
1. cascade machine liquid hybrid drive system, it is characterized in that, comprise hydraulic free-piston engine, HM Hydraulic Motor, main reduction gear and wheel, be connected by the high-pressure and hydraulic flexible pipe between the high pressure oil input end of the high-pressure and hydraulic of hydraulic free-piston engine oil mouth and HM Hydraulic Motor, be connected by hydraulic oil pipe between the low pressure oil absorbing end of hydraulic free-piston engine and the return opening of HM Hydraulic Motor, hydraulic motor output shaft is connected with main reduction gear, and main reduction gear is connected with wheel.
2. a kind of cascade machine liquid hybrid drive system according to claim 1, it is characterized in that, also comprise high pressure accumulator, high pressure accumulator is linked into the high-pressure and hydraulic flexible pipe between the high pressure oil input end of the high-pressure and hydraulic oil mouth of hydraulic free-piston engine and HM Hydraulic Motor.
3. a kind of cascade machine liquid hybrid drive system according to claim 1 is characterized in that, comprises that also low pressure accumulator, low pressure accumulator are linked into the hydraulic oil pipe between the return opening of the low pressure oil absorbing end of hydraulic free-piston engine and HM Hydraulic Motor.
4. a kind of cascade machine liquid hybrid drive system according to claim 1 is characterized in that HM Hydraulic Motor is a hydraulic pump motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200767496U CN201970842U (en) | 2011-03-22 | 2011-03-22 | Hydraulic combination driving system for cascade machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200767496U CN201970842U (en) | 2011-03-22 | 2011-03-22 | Hydraulic combination driving system for cascade machine |
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| Publication Number | Publication Date |
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| CN201970842U true CN201970842U (en) | 2011-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011200767496U Expired - Fee Related CN201970842U (en) | 2011-03-22 | 2011-03-22 | Hydraulic combination driving system for cascade machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105980184A (en) * | 2013-12-11 | 2016-09-28 | 罗伯特·博世有限公司 | Hydraulic hybrid system |
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2011
- 2011-03-22 CN CN2011200767496U patent/CN201970842U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105980184A (en) * | 2013-12-11 | 2016-09-28 | 罗伯特·博世有限公司 | Hydraulic hybrid system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110914 Termination date: 20140322 |