CN101886562A - Variable valve timing and variable valve lift control system for automobile engine - Google Patents
Variable valve timing and variable valve lift control system for automobile engine Download PDFInfo
- Publication number
- CN101886562A CN101886562A CN201010216297.7A CN201010216297A CN101886562A CN 101886562 A CN101886562 A CN 101886562A CN 201010216297 A CN201010216297 A CN 201010216297A CN 101886562 A CN101886562 A CN 101886562A
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- variable valve
- return spring
- cam
- control system
- engine
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Abstract
The invention discloses a variable valve timing and variable valve lift control system for an automobile engine, which comprises a return spring bracket 1, a cam shaft 2, a return spring 3, a shaft neck 4, a cam 5, a lead screw 6, a stepping motor 7 and a plug 8, wherein the return spring 3 is arranged in the return spring bracket 1; the return spring 3 is connected with the cam shaft 2; the shaft neck 4 is connected with the cam 5; the stepping motor 7 is connected with the cam 5 through the lead screw 6; and the plug 8 is arranged on the stepping motor 7 and is used for connecting an external power source. The system of the invention can be formed by direct expansion on an engine computer and does not need an individual control system. Moreover, by controlling an intake valve and an exhaust valve, exhaust gas recirculation (EGR) of an engine can be realized very conveniently, and emission of NOX is greatly reduced.
Description
Technical field
The present invention relates to a kind of motor car engine variable valve timing and variable valve lift control system.
Background technique
Motor car engine port timing and valve lift have a significant impact engine performance.Different along with engine speed and load, also different to the requirement of port timing and valve lift.Along with the raising of engine speed and load, advance opening of valve, valve lag and close the angle and valve lift all should increase, otherwise then should reduce.But in traditional engine valve actuating mechanism, the relative position of the shape of valve actuation cam, camshaft and bent axle is fixed, port timing and valve lift can not change when engine running, and natural engine performance just can not all can be optimized under various operating modes.For addressing the above problem, motor car engine variable valve timing and variable air valve lift apparatus arise at the historic moment.But present existing variable valve timing mechanism mainly is the relative position that changes bent axle and camshaft, has increased advance opening of valve and has also just reduced the retarded closing of valve angle, and total angle still is constant; And variable valve timing and lift range variable are not continually varyings, and just are divided into two stages, therefore, still can not satisfy the needs of all working conditions change.
The model utility content
The present invention seeks to provides a kind of motor car engine variable valve timing and variable valve lift control system at the defective that prior art exists.
The present invention adopts following technological scheme for achieving the above object:
Motor car engine variable valve timing of the present invention and variable valve lift control system is characterized in that comprising return spring support 1, camshaft 2, return spring 3, axle journal 4, cam 5, screw mandrel 6, stepper motor 7 and plug 8, wherein in the spring bracket 1 return spring 3 is set, return spring 3 is connected with camshaft 2, and axle journal 4 is connected with cam 5, stepper motor 7 is connected with cam 5 by screw mandrel 6, and plug 8 is arranged at and is used to connect external power supply on the stepper motor 7.
The present invention can directly expand on engine computer and form, and does not need independent control system.And by the inlet and outlet door is all carried out control, can easily realize exhaust gas recirculation (EGR) function of motor, reduce NO greatly
XDischarging.
Description of drawings
Fig. 1: motor car engine variable valve timing and variable valve lift control system schematic diagram.
Fig. 2: stepping motor control circuit figure.
Embodiment
This control system principle as shown in Figure 1.Cam of camshaft curve is the continually varying curve that can satisfy the port timing and the valve lift of all working condition requirements of motor, and the camshaft axial position is by step motor drive, and stepper motor is controlled by engine computer (ECU).The step motor control principle as shown in Figure 2.Engine computer is mainly according to set signalling comprehensive, calculating such as rotating speed, load, water temperature, throttle openings, bonding order and number of times by control ISC1, ISC2, ISC3, ISC4, sense of rotation and step number with regard to the may command stepper motor, and then accurately control the length that screw mandrel stretches out or shortens, screw mandrel stretches out, actuating cam axially moves left, and has changed the contact position of cam and valve tappet, has also just changed the port timing and the valve lift of valve.Screw mandrel shortens, and then makes it automatically to the right by return spring control, makes the port timing of valve and valve lift obtain accurate control equally.
Claims (1)
1. motor car engine variable valve timing and variable valve lift control system is characterized in that comprising return spring support 1, camshaft 2, return spring 3, axle journal 4, cam 5, screw mandrel 6, stepper motor 7 and plug 8, wherein in the spring bracket 1 return spring 3 is set, return spring 3 is connected with camshaft 2, and axle journal 4 is connected with cam 5, stepper motor 7 is connected with cam 5 by screw mandrel 6, and plug 8 is arranged at and is used to connect external power supply on the stepper motor 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010216297.7A CN101886562A (en) | 2010-06-30 | 2010-06-30 | Variable valve timing and variable valve lift control system for automobile engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010216297.7A CN101886562A (en) | 2010-06-30 | 2010-06-30 | Variable valve timing and variable valve lift control system for automobile engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101886562A true CN101886562A (en) | 2010-11-17 |
Family
ID=43072625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010216297.7A Pending CN101886562A (en) | 2010-06-30 | 2010-06-30 | Variable valve timing and variable valve lift control system for automobile engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101886562A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071981A (en) * | 2011-01-31 | 2011-05-25 | 重庆长安汽车股份有限公司 | Automobile engine air distribution cam suitable for variable two-stage air valve lift |
| CN102155271A (en) * | 2011-04-01 | 2011-08-17 | 王平 | Engine control device without throttle valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4352344A (en) * | 1979-07-03 | 1982-10-05 | Nissan Motor Co., Ltd. | Valve operating mechanism for internal combustion engines |
| CN1890460A (en) * | 2003-12-12 | 2007-01-03 | 宝马股份公司 | Electrical valve actuating device comprising a rotary actuator |
| CN201159093Y (en) * | 2008-02-15 | 2008-12-03 | 蔡学功 | Variable air valve mechanism of hydraulic internal combustion engine |
| CN101446217A (en) * | 2008-12-31 | 2009-06-03 | 奇瑞汽车股份有限公司 | Air distribution mechanism with variable valve lift |
| CN101701538A (en) * | 2009-09-03 | 2010-05-05 | 江门市硕普科技开发有限公司 | Mechanism capable of continuously changing valve phase for motor |
| CN201705407U (en) * | 2010-06-30 | 2011-01-12 | 龚文资 | Variable-gas-distribution-phase and variable-gas-valve-lift-range control system of automobile engine |
-
2010
- 2010-06-30 CN CN201010216297.7A patent/CN101886562A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4352344A (en) * | 1979-07-03 | 1982-10-05 | Nissan Motor Co., Ltd. | Valve operating mechanism for internal combustion engines |
| CN1890460A (en) * | 2003-12-12 | 2007-01-03 | 宝马股份公司 | Electrical valve actuating device comprising a rotary actuator |
| CN201159093Y (en) * | 2008-02-15 | 2008-12-03 | 蔡学功 | Variable air valve mechanism of hydraulic internal combustion engine |
| CN101446217A (en) * | 2008-12-31 | 2009-06-03 | 奇瑞汽车股份有限公司 | Air distribution mechanism with variable valve lift |
| CN101701538A (en) * | 2009-09-03 | 2010-05-05 | 江门市硕普科技开发有限公司 | Mechanism capable of continuously changing valve phase for motor |
| CN201705407U (en) * | 2010-06-30 | 2011-01-12 | 龚文资 | Variable-gas-distribution-phase and variable-gas-valve-lift-range control system of automobile engine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071981A (en) * | 2011-01-31 | 2011-05-25 | 重庆长安汽车股份有限公司 | Automobile engine air distribution cam suitable for variable two-stage air valve lift |
| CN102071981B (en) * | 2011-01-31 | 2012-11-07 | 重庆长安汽车股份有限公司 | Automobile engine air distribution cam suitable for variable two-stage air valve lift |
| CN102155271A (en) * | 2011-04-01 | 2011-08-17 | 王平 | Engine control device without throttle valve |
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| PB01 | Publication | ||
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Open date: 20101117 |