CN101363337B - Valve lift range variable valve mechanism - Google Patents
Valve lift range variable valve mechanism Download PDFInfo
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- CN101363337B CN101363337B CN2008101684243A CN200810168424A CN101363337B CN 101363337 B CN101363337 B CN 101363337B CN 2008101684243 A CN2008101684243 A CN 2008101684243A CN 200810168424 A CN200810168424 A CN 200810168424A CN 101363337 B CN101363337 B CN 101363337B
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- valve
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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
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The invention relates to a variable valve lift actuating mechanism of a reciprocating-piston engine, belonging to the field of mechanical and thermal power. The mechanism comprises a camshaft, a hydraulic pump, a hydraulic cylinder, a valve, and the like, wherein, the camshaft drives the hydraulic pump and the hydraulic pump drives the hydraulic cylinder to close or open the valve. A computer cancontrol the oil pump output of the hydraulic pump in virtue of actuators like a stepping motor, and the like, thus controlling the opening degree of the valve. Under the control of the computer of theengine, the mechanism can regulate the opening degree of the valve of each cylinder in a stepless manner. In this way, the computer can ensure that some cylinders stop working, some ones have large load and others have small load according to the load of the engine, thus improving the loading rate of working cylinders and realizing the purpose of energy saving. In addition, the mechanism can control the air input of the cylinders by controlling the opening degree of the valve, thus omitting a throttle valve of a gasoline engine and improving the specific power of the engine.
Description
Technical field
The present invention relates to a kind of conventional engine lift range valve mechanism for variable valve, belong to machinery, thermal power field.
Background technique
At present, the widest motor of known application face is a conventional engine, and it all has application on apparatuss of transport such as automobile, train, steamer.It is made up of connecting rod, distribution device, cooling system, fuel supply system, ignition system, lubrication system etc.Wherein distribution device is made up of valve transmission group and valve group.Valve is worked according to certain rules according to workmanship's order of each cylinder, can not independently control.Experiment shows that the peak efficiency of petrol engine is about 30%, and the peak efficiency of diesel engine is about 40%.Peak efficiency occurs in motor near under the fully loaded operating mode, and most motor (as: motor of using on the apparatuss of transport such as automobile, train, steamer) is operated in the most of the time under the operating mode of medium and small load.Under medium and small load, the efficient of motor will cause the waste of a large amount of fuel well below its peak efficiency.Address this problem comparatively that effective method is, under medium and small load, close the Rate of load condensate that partial cylinders improves working cylinder.Traditional distribution device is because valve can not independently be controlled the function that can not realize shifter cylinder.In addition, the petrol engine of using all has closure at present, and it hinders air inlet, influences the volumetric efficiency of cylinder, thereby reduces the specific power of motor.
Summary of the invention
Low in order to overcome the available engine Rate of load condensate, efficient is low, and the problem that waste of fuel is big and specific power is low the invention provides a kind of lift range valve mechanism for variable valve, this mechanism can be under the control of control unit of engine the aperture of each cylinder valve of step-less adjustment.Like this, control unit of engine just can be according to the size of engine load, and the cylinder that makes is not worked; The load that has is big; The load that has is little, thereby improves the Rate of load condensate of working cylinder.In addition, this mechanism can pass through the air inflow of the aperture control cylinder of valve, thereby can save the closure of petrol engine, has improved the specific power of motor.
The technical solution adopted for the present invention to solve the technical problems is: what the present invention was different with traditional distribution device is: traditional distribution device is made up of parts such as camshaft, tappet, push rod, rocking arm, valves, the aperture of valve can not be adjusted and can not be controlled respectively by the lift decision of camshaft.And this mechanism is made up of camshaft, oil hydraulic pump, oil hydraulic cylinder, valve etc., and camshaft actuated oil hydraulic pump, hydraulic pump drive oil hydraulic cylinder open and close valve.Oil hydraulic pump adopts class vane pump (as embodiment 2,3) or deformed vanes pump (as embodiment 1), and the centre distance of rotor of class vane pump (17) and pump case (18) can change, so the pump oil mass just can change, and valve lift just can change; The deformed vanes pump can change the pump oil mass by rotating the swing pump housing (14).Control unit of engine is controlled the pump oil mass of each oil hydraulic pump respectively by final controlling element such as stepper motors, thereby controls the aperture of each valve respectively.
The invention has the beneficial effects as follows:, reduced oil consumption by closing the Rate of load condensate and the efficient of cylinder control raising working cylinder.And, improved the specific power of motor by removing the closure of petrol engine.
Description of drawings
Fig. 1 is first embodiment's of lift range valve mechanism for variable valve a structure principle chart
Fig. 2 is the A-A sectional drawing of Fig. 1
Fig. 3 is second embodiment's of lift range valve mechanism for variable valve a structure principle chart
Mark among the figure: 1. valve is controlled oil cylinder, 2. oil cylinder cover, 3. oil cylinder piston, 4. oil duct, 5. camshaft, the 6. movable pump housing, 7. blade, 8. axle, 9. valve lift regulating tie bar, 10. valve, 11. feather key, 12. movable pump housing return springs, 13. pump housings, 14. the swing pump housing, 15. baffle plates, 16. rocking arms, 17. rotor, 18. pump cases, 19. pull bars.
Embodiment
Embodiment 1: as shown in Figure 1 and Figure 2, this mechanism is made up of camshaft (5), oil hydraulic pump, oil hydraulic cylinder, valve etc.Oil hydraulic pump is the deformed vanes pump, is made up of the movable pump housing (6), the swing pump housing (14), front and rear baffle (15), blade (7), movable pump housing return spring (12), valve lift regulating tie bar (9) etc.The movable pump housing (6) can move up and down along feather key (11), and the swing pump housing (14) can be around axle (8) swing under the drive of valve lift regulating tie bar (9), and blade (7) can stretch in its groove.Oil hydraulic cylinder is controlled oil cylinder (1), oil cylinder cover (2), oil cylinder piston (3) etc. by valve and is formed.Between oil cylinder cover (2) and the oil cylinder piston (3) spring is arranged, guarantee that oil cylinder piston (3) contacts with valve (10) all the time.There is oil duct (4) to link to each other between oil hydraulic cylinder and the oil hydraulic pump.During engine operation, camshaft (5) rotates the promotion activity pump housing (6) and moves downward, blade (7) is gone up at the swing pump housing (14) and is slided, at this moment the enclosed space that is surrounded by the movable pump housing (6), the swing pump housing (14), two blades (7) and front and rear baffle (15) dwindles, its inner engine oil pressure raises, machine oil flows to oil hydraulic cylinder by oil duct (4), promotes oil cylinder piston (3) and moves downward, and valve (10) is opened.Along with the rotation of camshaft (5), the movable pump housing (6) moves upward under the promotion of movable pump housing return spring (12).The enclosed space that is surrounded by the movable pump housing (6), the swing pump housing (14), two blades (7) and front and rear baffle (15) increases, its inner engine oil pressure reduces, machine oil under the effect of valve return in the oil hydraulic cylinder flows to oil hydraulic pump, and oil cylinder piston (3) rises, and valve (10) is closed.Control unit of engine drives valve lift regulating tie bar (9) by final controlling element such as stepper motors and makes the swing pump housing (14) swing, so at the movable pump housing (6) when moving up and down, change has taken place in the volume change of above-mentioned enclosed space, thereby has changed the lift of valve (10).When the swing pump housing (14) is parallel with the movable pump housing (6), valve (10) will no longer be opened.Therefore, control unit of engine can arbitrarily be controlled the lift of each valve, thereby controls the air inflow and the working state of each cylinder respectively, realizes the control of closing different load rate between cylinder control and cylinder of motor, reaches the purpose of fuel-economizing.Certainly, the closure of petrol engine can remove, thereby improves the specific power of motor.When our open out,, the power of motor is increased by the lift increase of control unit of engine control valve.
Embodiment 2: as shown in Figure 3, different is oil hydraulic pump with embodiment 1, and it is similar to common vane pump, and we just are its class vane pump.Its rotor (17) links to each other with rocking arm (16) and rotates together, pump case (18) can be under the drive of pull bar (19) move left and right, thereby change the centre distance of pump case (18) and rotor (17).When engine operation, camshaft (5) drives rotor (17) swing by rocking arm (16), and the enclosed space of class vane pump bottom is changed, and makes oil cylinder piston (3) motion by oil duct (4), opens and closes thereby promote valve.The centre distance that changes rotor (17) and pump case (18) has just changed the pump oil mass of class vane pump, has also just changed the lift of valve.When centre distance is zero, valve-closing.If the inlet and exhaust valve of a cylinder is all closed, then this cylinder quits work, and just we say closes cylinder.Control unit of engine can drive pull bar (19) and pump case (18) move left and right with final controlling element such as stepper motors, controls the lift of valve, realizes the control of closing different load rate between cylinder control and cylinder of motor, reaches the purpose of fuel-economizing.Certainly, the closure of petrol engine can remove, thereby improves the specific power of motor.
Embodiment 3: as shown in Figure 3, remove upper half part of class vane pump.By embodiment 2 as seen, upper half part of class vane pump is inoperative at work, does not influence work so remove it.
Claims (1)
1. lift range valve mechanism for variable valve, form by control unit of engine, final controlling element, valve transmission group, valve group, the valve transmission group is made up of the variable oil hydraulic pump of pump oil mass, oil duct (4) and oil hydraulic cylinder, and oil hydraulic pump links to each other with oil hydraulic cylinder by oil duct (4), it is characterized in that: oil hydraulic pump adopts the class vane pump, the rotor of class vane pump (17) links to each other with rocking arm (16), and pump case (18) that can move left and right links to each other with pull bar (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101684243A CN101363337B (en) | 2008-09-30 | 2008-09-30 | Valve lift range variable valve mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101684243A CN101363337B (en) | 2008-09-30 | 2008-09-30 | Valve lift range variable valve mechanism |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102259611A Division CN101701541B (en) | 2008-09-30 | 2008-09-30 | Variable valve mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101363337A CN101363337A (en) | 2009-02-11 |
| CN101363337B true CN101363337B (en) | 2010-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101684243A Expired - Fee Related CN101363337B (en) | 2008-09-30 | 2008-09-30 | Valve lift range variable valve mechanism |
Country Status (1)
| Country | Link |
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| CN (1) | CN101363337B (en) |
Families Citing this family (3)
| 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 |
| JP6460140B2 (en) * | 2017-03-15 | 2019-01-30 | マツダ株式会社 | Engine control apparatus and control method |
| CN109339898B (en) * | 2018-10-31 | 2024-03-22 | 吉林大学 | Pull rod type variable valve device of engine |
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2008
- 2008-09-30 CN CN2008101684243A patent/CN101363337B/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN101363337A (en) | 2009-02-11 |
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Owner name: TEXAS COLLEGE Free format text: FORMER OWNER: YANG HELI Effective date: 20100319 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Free format text: CORRECT: ADDRESS; FROM: 253023 AUTO ENGINEERING DEPARTMENT, SOUTH AREA, DEZHOU COLLEGE, NO.566, DAXUE WEST ROAD, DECHENG DISTRICT, DEZHOU CITY, SHANDONG PROVINCE TO: 253023 NO.566, DAXUE WEST ROAD, DECHENG DISTRICT, DEZHOU CITY, SHANDONG PROVINCE |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20100319 Address after: 253023 Shandong, Germany, Dezhou City University West Road, No. 566 Applicant after: Dezhou College Address before: 253023 Department of automotive engineering, Dezhou University, 566 West University Road, Decheng District, Shandong, Dezhou Applicant before: Yang Heli |
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Granted publication date: 20100602 Termination date: 20110930 |