CN201162550Y - Electric-hydraulic control variable-distribution apparatus of diesel engine - Google Patents
Electric-hydraulic control variable-distribution apparatus of diesel engine Download PDFInfo
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- CN201162550Y CN201162550Y CNU2007200983111U CN200720098311U CN201162550Y CN 201162550 Y CN201162550 Y CN 201162550Y CN U2007200983111 U CNU2007200983111 U CN U2007200983111U CN 200720098311 U CN200720098311 U CN 200720098311U CN 201162550 Y CN201162550 Y CN 201162550Y
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Abstract
The utility model discloses a diesel engine electro-hydraulic control variable valve which comprises an adjustable stable pressure source. The device also comprises a two-step two-way electromagnetic valve with a fuel inlet port that is connected with the adjustable stable pressure source through an oil supply line, an electronic control unit which is connected with an electromagnetic valve, a valve rocker and hydraulic push rod assembly. The hydraulic push rod assembly comprises a push rod, a pressure chamber, a hydraulic piston which is arranged in the pressure chamber and is connected with a push rod. The valve rocker is a lever structure which can move around a rocker shaft. One end of the valve rocker presses on a piston, and the other end presses on the valve. The pressure chamber is communicated with the oil outlet of the electromagnetic valve through a pipeline. The variable valve has the advantages of simple structure and convenient control adjustment and has no quiet high requirement for the machining accuracy and material mechanical properties of hydraulic push rod coupling parts. The service life of elements is long. The timing and the lifting can be continuously adjusted flexibly. With small modification on an original device and easily realized technical industrialization, the diesel engine electro-hydraulic control variable valve can be refit on the basis of the present push rods.
Description
Technical field
The utility model relates to electrichydraulic control variable gas distribution device, relates in particular to diesel engine electrichydraulic control variable gas distribution device.
Background technique
Traditional piston four stroke engine generally adopts the distribution device of mechanical type camshaft actuated inlet door and exhaust valve.Valve move through bent axle and camshaft, the mechanical transmission between camshaft and each valve is controlled regularly.For a long time, this mechanical type mechanism is proved to be simply, effectively and reliably, and expense is cheap relatively.Yet this valve mechanism is in the unlatching moment of valve, and it is changeless opening on the parameters such as endurance and valve lift, can't regulate in engine operation, and work lacks flexible.And these changeless valve Operational Limitss can only be by various port timing test, therefrom choose a kind of compromise proposal of engine performance when taking into account various operating mode, best timing can not be provided in all cases, and the engine performance potentiality can not be not fully exerted.Because this compromise basic demand that can satisfy the most of operating mode of internal-combustion engine is so be considered to feasible.But since the eighties in 20th century, the energy and environmental problem become increasingly conspicuous, society is to the increasingly stringent that requires of the Economy of fuel oil and noxious emission, how to improve performance, the raising thermal efficiency of motor and reduce noxious emission more and more receiving publicity, this just requires conventional engines is improved.
Port timing directly affects the intake and exhaust performance of motor, and the quality of combustion process is played crucial effects.The selection of port timing will be considered the problems such as fuel economy, low-speed stability and toxic emission under the high-speed power, low speed torque, idling oil consumption, sub load of motor.In order to obtain engine performance preferably, port timing should change along with the variation of rotating speed and load.Motor is needing bigger valve overlap and IC Intake Valve Closes angle at a high speed and under the big load, so that obtain higher power output; Otherwise, at idling and less IC Intake Valve Closes angle and the valve overlap of the next needs of the little load of low speed, so that obtain idling stationarity and gas exhausting property preferably.
Engine operation person has improved the design of motor at reducing Engine's Harmful Emission, improved the control system of motor, exhaust gas recirculation (EGR) and post-processing technology have appearred, yet be accompanied by the minimizing of Engine's Harmful Emission, but cause the reduction of engine efficiency, and when adopting high pressure-charging pressure, may cause the motor maximum explosive pressure too high.The variable gas distribution technology can realize miller cycle by changing the valve opening close moment, under certain operating mode of motor operation, can utilize in the compression stroke, the time that the retarded admission door is closed, the gas that makes a part enter cylinder reenters inlet manifold, and under turbo charged effect, keeping certain air pressure, the intake efficiency of motor can increase and reduce pump greatly and inhale loss.Thereby the many reduction compression ratios when so just having caused actual pressurized air not have air inlet cause expansion ratio greater than compression ratio, reduce the maximum explosive pressure of engine operation.
Compare with fixing port timing, variable valve timing then can be under rotating speed in the whole operating range of motor and load, best valve opening, close moment or lift is provided, thereby improve motor inlet and outlet performance, satisfy the requirement of motor preferably, the whole motor combination property that improves in high rotating speed and the slow-speed of revolution, big load power character, Economy, toxic emission during with little load.The development of modern high technology is carried out comprehensive study and technological development with energy-conservation, synergy, the low emission of motor car engine as " energy-conservation-efficient-environmental protection " integrated problem.The changeless restriction of the port timing incompatibility requirements of the times that more and more seem, for this reason, the changeable air valve technology has become one of motor car engine research emphasis direction.
The variable gas distribution technology is because the advantage of self, be subject to people's attention day by day, foreign study mechanism has carried out a large amount of research, a variety of variable valve actuations have appearred, some system has realized the function of valve changeable parameters, but have only minority mechanism simple in structure, lower-cost to realize commercialization, most of variable valve actuations are because the higher or reliability problems of cost is only at the experimental stage.Variable valve actuating mechanism in the existing product is main mode with the phase place that changes camshaft, and is all bigger to the change of former motor, is more common in the small-power petrol engine.Because high-power diesel engine intake and exhaust cam axle is divided into " overhead " and " putting at the bottom of the side " two kinds, because " putting at the bottom of the side " camshaft makes engine structure simple, low cost of manufacture, use very extensive at present, usually its inlet and exhaust valve is by same camshaft actuated, be difficult to make inlet and exhaust valve to adjust respectively, so the changeable air valve technology of high-power diesel engine remains to be developed.
Summary of the invention
The purpose of this utility model is to overcome the shortcoming of prior art, a kind of both less demanding to material and process equipment are provided, little to former diesel engine change, the while can reliably be realized the diesel engine electrichydraulic control variable gas distribution device of engine valve timing and the continuous flexibility and changeability of lift again.
The technological scheme that its technical problem that solves the utility model adopts is: diesel engine electrichydraulic control variable gas distribution device, it comprises adjustable source of consistent pressure, it also comprises the 2/2-way solenoid valve that its filler opening links to each other with described adjustable source of consistent pressure by oil supply line, the ECU (Electrical Control Unit) that links to each other with described solenoid valve, valve rocker, the hydraulic push rod assembly, described hydraulic push rod assembly comprises a push rod, the pressure chamber, be arranged on the hydraulic piston that links to each other with described push rod in the described pressure chamber, described valve rocker is can be around the lever construction of pitman arm shaft motion, the one end is pressed on the described piston, the other end is pressed on the valve, and described pressure chamber is connected with the oil outlet of described solenoid valve by pipeline.
The beneficial effects of the utility model are that system architecture is simple, controls easy to adjust; Machining accuracy and mechanical properties of materials to hydraulic push rod idol part do not have too high request, the long service life of element; Timing and lift can be adjusted continuously flexibly; Can on the existing push rod basis of common engine, reequip, little to former machine change, be easy to the industrialization of the technology that realizes.
Description of drawings
Accompanying drawing is the systematic schematic diagram of diesel engine electrichydraulic control variable gas distribution device of the present utility model.
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
Diesel engine electrichydraulic control variable gas distribution device as shown in drawings, it comprises adjustable source of consistent pressure 3, it also comprises the 2/2-way solenoid valve 2 that its filler opening links to each other with described adjustable source of consistent pressure by oil supply line, the ECU (Electrical Control Unit) 4 that links to each other with described solenoid valve 2, valve rocker 7, hydraulic push rod assembly 1, described hydraulic push rod assembly comprises a push rod, pressure chamber 5, be arranged on the hydraulic piston 6 that links to each other with described push rod in the described pressure chamber 5, described valve rocker 7 is can be around the lever construction of pitman arm shaft motion, the one end is pressed in the described piston 6, and the other end is pressed on the valve 8.Described pressure chamber is connected with the oil outlet of described solenoid valve by pipeline.Adjustable source of consistent pressure can comprise hydraulic-pressure pump, pressure regulator valve and voltage stabilizer, voltage stabilizer can be any type of stable-pressure device, also the oil duct that can use enough volumes plays pressure stabilization function, described adjustable source of consistent pressure can be linked to each other by hydraulic-pressure pump, voltage stabilizer and constitute, described voltage stabilizer is provided with pressure regulator valve, and the oil outlet of described voltage stabilizer links to each other by the filler opening of oil supply line with described 2/2-way solenoid valve.Described can hydraulic-pressure pump can be in gear pump, plunger pump, rotor pump and the vane pump any.Described ECU (Electrical Control Unit) can be special-purpose controlling component, also the control function can be integrated in the control unit of engine (ECU).Described hydraulic push rod assembly 1 can be converted by the former machine push rod of motor.
Diesel engine electrichydraulic control variable gas distribution device of the present utility model comprises two kinds of mode of operations: a kind of is the mode of operation of strap cam axle, and a kind of is the mode of operation of strap cam axle not.
1. strap cam axle mode of operation
This device is under the mode of operation that cooperates camshaft, when system is idle, the described 2/2-way solenoid valve 2 of described ECU (Electrical Control Unit) 4 controls keeps normally off, the machine oil that described adjustable source of consistent pressure 3 is carried is directly got back to supply reservoir, described hydraulic push rod assembly 1 pumps with engine cam 9 rotations, and inlet and exhaust valve is moved with lift according to the timing of former machine, and this moment, hydraulic piston 6 was in lowest order, push rod length minimum, valve 8 move according to cam profile.
When described hydraulic push rod assembly 1 is rotating in the process that pumps with engine cam, open fuel feeding in piston chamber by the described 2/2-way solenoid valve 2 of described ECU (Electrical Control Unit) 4 controls in a certain moment of setting, piston chamber's internal pressure is raise rapidly, when pressure during greater than valve spring power, described hydraulic piston 6 is up in piston chamber, and described hydraulic push rod assembly 1 length increases; When described hydraulic push rod assembly 1 in same distribution circulation, cut off fuel feeding in piston chamber by described ECU (Electrical Control Unit) 4 control 2/2-way solenoid valves 2 constantly at another, and make piston chamber and supply reservoir UNICOM, piston chamber's inner engine oil pushes back supply reservoir under the effect of valve spring power, piston chamber's internal pressure is reduced rapidly, described hydraulic push rod assembly 1 returns to raw footage rapidly, finishes the adjustment of timing and lift in distribution circulation of motor.
2. strap cam axle mode of operation not
This device is at strap cam axle not independently under the mode of operation, described hydraulic push rod assembly 1 can place any position that engine valve is moved, a certain moment unlatching fuel feeding in piston chamber that described ECU (Electrical Control Unit) 4 is being set by control 2/2-way solenoid valve 2, piston chamber's internal pressure is raise, when pressure during greater than valve spring power, described hydraulic push rod assembly 1 length increases, valve opening; When described hydraulic push rod assembly 1 in same distribution circulation, cut off fuel feeding in piston chamber by ECU (Electrical Control Unit) 4 control 2/2-way solenoid valves 2 constantly at another that set, piston chamber's inner engine oil is because the effect of valve spring elastic force pushes back sump, piston chamber's internal pressure is reduced, described hydraulic push rod assembly 1 returns to raw footage, valve event is finished in valve-closing one time.
Diesel engine electrichydraulic control variable gas distribution device of the present invention, accurately control according to engine operating state by ECU (Electrical Control Unit) 4, by the moment of in good time adjustment 2/2-way solenoid valve 2 opening and closing, can adjust oil-feed in the piston chamber and oil-break in the hydraulic push rod assembly 1 flexibly, by changing the length of hydraulic push rod assembly 1, adjust the timing and the lift of engine breathing flexibly, thereby adjust engines distribution to the optimum state.
Electric-hydraulic control variable-distribution apparatus of diesel engine of the present invention, its advantage is:
1. system architecture is simple, and is little to former machine change, can realize low cost fabrication;
2. owing to (only need 5～10MPa), the driving power that hydraulic oil pump is required to the pressure of adjustable source of consistent pressure is less demanding Little, so the power consumption of system is little;
3. this system acts on respectively each cylinder of engine, can realize the separate adjustment of each cylinder intake and exhaust, also can realize wherein certain Single cylinder or a few cylinder intake and exhaust are adjusted, and bring into play to greatest extent the variable flexibility of intake and exhaust phase place and lift, optimize engine Performance;
4. this system controls flexibly by automatical control system, can be by the figure of the control MAP under the various operating modes of full course of inquiry engine operation, and real-time adjusts to the optimum state with intake and exhaust;
5. system's control is simple and convenient, only need carry out time-oriented sequential control to a 2/2-way solenoid valve and just can make system satisfy the requirement of engine valve timing and lift continuous changeable;
6. when adopting the independent working mode of strap cam axle not, can cancel engine cam, reduce motor and be lost in power consumption on the distribution device.
Claims (4)
1. diesel engine electrichydraulic control variable gas distribution device, it comprises adjustable source of consistent pressure, it is characterized in that: it also comprises the 2/2-way solenoid valve that its filler opening links to each other with described adjustable source of consistent pressure by oil supply line, the ECU (Electrical Control Unit) that links to each other with described solenoid valve, valve rocker, the hydraulic push rod assembly, described hydraulic push rod assembly comprises a push rod, the pressure chamber, be arranged on the hydraulic piston that links to each other with described push rod in the described pressure chamber, described valve rocker is can be around the lever construction of pitman arm shaft motion, the one end is pressed on the described piston, the other end is pressed on the valve, and described pressure chamber is connected with the oil outlet of described solenoid valve by pipeline.
2. diesel engine electrichydraulic control variable gas distribution device according to claim 1, it is characterized in that: described adjustable source of consistent pressure is linked to each other by hydraulic-pressure pump, voltage stabilizer and constitutes, described voltage stabilizer is provided with pressure regulator valve, and the oil outlet of described voltage stabilizer links to each other by the filler opening of oil supply line with described 2/2-way solenoid valve.
3. diesel engine electrichydraulic control variable gas distribution device according to claim 2 is characterized in that: described hydraulic-pressure pump is a kind of in gear pump, plunger pump, rotor pump and the vane pump.
4. diesel engine electrichydraulic control variable gas distribution device according to claim 1 is characterized in that: described ECU (Electrical Control Unit) maybe will be controlled function for controlling component independently and be integrated in the control unit of engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200983111U CN201162550Y (en) | 2007-12-04 | 2007-12-04 | Electric-hydraulic control variable-distribution apparatus of diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200983111U CN201162550Y (en) | 2007-12-04 | 2007-12-04 | Electric-hydraulic control variable-distribution apparatus of diesel engine |
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| CN201162550Y true CN201162550Y (en) | 2008-12-10 |
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| CNU2007200983111U Expired - Fee Related CN201162550Y (en) | 2007-12-04 | 2007-12-04 | Electric-hydraulic control variable-distribution apparatus of diesel engine |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305135A (en) * | 2011-04-22 | 2012-01-04 | 许星 | Electric control air valve driving mechanism for automobile engine |
| WO2012012973A1 (en) * | 2010-07-30 | 2012-02-02 | 天津大学 | Hydraulic self-adaptation variable valve timing system for diesel engine and control method therefor |
| CN102628740A (en) * | 2012-04-12 | 2012-08-08 | 杭州电子科技大学 | Rocker arm static calibration experimental device and method of engine valve distributing mechanism |
| CN103266927A (en) * | 2013-05-07 | 2013-08-28 | 天津大学 | Rocker system of hydraulic stepless variable valve |
| CN104929711A (en) * | 2014-03-21 | 2015-09-23 | 福特环球技术公司 | Applied-ignition internal combustion engine with variable valve drive |
| CN106401687A (en) * | 2015-07-27 | 2017-02-15 | 长城汽车股份有限公司 | Valve lift control system and control method thereof |
| CN104295333B (en) * | 2013-07-16 | 2017-02-22 | 张珊 | Engine valve mechanism |
| CN106704442A (en) * | 2017-03-24 | 2017-05-24 | 中国北方车辆研究所 | Hydro-pneumatic spring |
| CN108240244A (en) * | 2017-12-29 | 2018-07-03 | 潍柴动力股份有限公司 | Diesel engine inlet valve variable system and diesel engine |
| CN109488409A (en) * | 2018-11-20 | 2019-03-19 | 哈尔滨工程大学 | A kind of two stroke diesel engine variable exhaust valve activator and its control method |
| CN110131055A (en) * | 2019-05-10 | 2019-08-16 | 天津大学 | A kind of deactivation apparatus suitable for engine |
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2007
- 2007-12-04 CN CNU2007200983111U patent/CN201162550Y/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012012973A1 (en) * | 2010-07-30 | 2012-02-02 | 天津大学 | Hydraulic self-adaptation variable valve timing system for diesel engine and control method therefor |
| RU2505683C2 (en) * | 2010-07-30 | 2014-01-27 | Тянь Цзинь Юниверсити | Self-adaptive hydraulic system with variable timing phases for diesel engine and method of its control |
| CN102305135A (en) * | 2011-04-22 | 2012-01-04 | 许星 | Electric control air valve driving mechanism for automobile engine |
| CN102628740A (en) * | 2012-04-12 | 2012-08-08 | 杭州电子科技大学 | Rocker arm static calibration experimental device and method of engine valve distributing mechanism |
| CN103266927A (en) * | 2013-05-07 | 2013-08-28 | 天津大学 | Rocker system of hydraulic stepless variable valve |
| CN103266927B (en) * | 2013-05-07 | 2014-11-26 | 天津大学 | Rocker system of hydraulic stepless variable valve |
| CN104295333B (en) * | 2013-07-16 | 2017-02-22 | 张珊 | Engine valve mechanism |
| CN104929711A (en) * | 2014-03-21 | 2015-09-23 | 福特环球技术公司 | Applied-ignition internal combustion engine with variable valve drive |
| CN104929711B (en) * | 2014-03-21 | 2019-05-31 | 福特环球技术公司 | Application ignited internal combustion engine with variable valve actuation |
| CN106401687A (en) * | 2015-07-27 | 2017-02-15 | 长城汽车股份有限公司 | Valve lift control system and control method thereof |
| CN106704442A (en) * | 2017-03-24 | 2017-05-24 | 中国北方车辆研究所 | Hydro-pneumatic spring |
| CN106704442B (en) * | 2017-03-24 | 2019-11-08 | 中国北方车辆研究所 | Hydro-pneumatic spring |
| CN108240244A (en) * | 2017-12-29 | 2018-07-03 | 潍柴动力股份有限公司 | Diesel engine inlet valve variable system and diesel engine |
| CN108240244B (en) * | 2017-12-29 | 2023-12-19 | 潍柴动力股份有限公司 | Variable system of diesel engine inlet valve and diesel engine |
| CN109488409A (en) * | 2018-11-20 | 2019-03-19 | 哈尔滨工程大学 | A kind of two stroke diesel engine variable exhaust valve activator and its control method |
| CN110131055A (en) * | 2019-05-10 | 2019-08-16 | 天津大学 | A kind of deactivation apparatus suitable for engine |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081210 Termination date: 20161204 |
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| CF01 | Termination of patent right due to non-payment of annual fee |