CN101705851A - Mechanical continuous variable valve lift driving device - Google Patents
Mechanical continuous variable valve lift driving device Download PDFInfo
- Publication number
- CN101705851A CN101705851A CN200910198514A CN200910198514A CN101705851A CN 101705851 A CN101705851 A CN 101705851A CN 200910198514 A CN200910198514 A CN 200910198514A CN 200910198514 A CN200910198514 A CN 200910198514A CN 101705851 A CN101705851 A CN 101705851A
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- arm
- bearing
- swing
- swing arm
- rocking arm
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Abstract
The invention provides a mechanical continuous variable valve lift driving device comprising a swing arm, a rocker arm, a cam shaft and an offset spring, wherein the swing arm swings by taking a first supporting seat as a fulcrum; the rocker arm swings by taking a second supporting seat as a fulcrum, the second supporting seat is a movable supporting seat; when the cam shaft rotates, a cam of the cam shaft is acted on the rocker arm to lead the rocker arm to swing, and the rocker arm is simultaneously acted on the swing arm to lead the swing arm to swing; and an offset spring assembly provides restoring force acted on the swing arm so as to press the swing arm and the rocker arm to lean against the cam shaft. The start lift and the continuous flexible control during the duration on a valve can be realized through adjusting the second supporting seat under the control of electronic equipment, thereby lowering the oil consumption of a whole engine and improving the power performance.
Description
Technical field
The present invention relates to a kind of engine valve actuator.
Background technique
Most practical piston type thermodynamic motors all adopt valve actuating mechanism control to enter the air charge of cylinder.This valve actuating mechanism mechanical parameter has designed definite, and then the valve motion rule is promptly fixing, can not row adjusting again in the motor actual motion.
The air charge demand has more different with the operating mode difference in the engine operation condition complexity, cylinder.With the petrol engine is example, when load hour, only need the less air amount, and be to suppress unnecessary air to enter in the cylinder, need to adopt the closure throttling, thereby cause pumping loss, increased the complete machine oil consumption.
If can control the lift and the duration of valve opening, then may replace closure, play the effect that control enters air charge in the cylinder, and reduce pumping loss.On the other hand, different rotating speeds adopts different maximum valve lift down, also can improve maximum engine torque.
Summary of the invention
The object of the present invention is to provide a kind of mechanical continuous variable valve lift driving device, it can realize the control flexibly continuously to valve opening lift and duration under the control of electronic equipment, can reduce the oil consumption of motor complete machine, improve power performance.
For realizing described purpose, mechanical continuous variable valve lift driving device of the present invention, be characterized in, comprise swing arm; rocking arm; camshaft and return spring assembly; swing arm is that fulcrum is swung with first bearing; rocking arm is that fulcrum is swung with second bearing; second bearing is a movable bearing support, and when camshaft rotated, the cam action of camshaft was on rocking arm; so that the rocking arm swing; and rocking arm acts in the swing arm simultaneously, so that the swing arm swing, the return spring assembly provides restoring force; this restoring force acts in this swing arm, so that swing arm and rocking arm are pressed against on the camshaft.
Described mechanical continuous variable valve lift driving device, its further characteristics are: first bearing is installed on the motor; Second bearing is installed on the motor movably; Swing arm has first end and second end, first end of swing arm connects first bearing, with first bearing is swing fulcrum and can the relative first bearing reciprocally swinging, second end of swing arm is the clutch end of this mechanical continuous variable valve lift driving device, has to be used for and the interactional cam profile of valve spring assembly; Rocking arm has first end, and first end of rocking arm connects second bearing, serves as swing fulcrum and can the relative second bearing reciprocally swinging with second bearing, and rocking arm and swing arm can be carried out transmission mutually; Camshaft is the power intake of this mechanical continuous variable valve lift driving device, is installed in rotation on the motor, comprises the cam that can carry out mutual transmission with rocking arm, and this rocking arm is between this cam and this swing arm.
Described mechanical continuous variable valve lift driving device, its further characteristics are: second end of rocking arm is equipped with can be around the roller of self rotational, and this rocking arm carries out mutual transmission with the cam and the swing arm of this camshaft respectively by this roller.
Described mechanical continuous variable valve lift driving device, its further characteristics are: first bearing and second bearing are separately positioned on the Control Shaft, this Control Shaft is installed in rotation on the motor, first bearing is the concentric circle section of this Control Shaft, and second bearing is the eccentric circle section of this Control Shaft.
Described mechanical continuous variable valve lift driving device, its further characteristics are: rocking arm is equipped with can be around the roller of self rotational, have arc convex surface on the arm body of swing arm, this swing arm and this rocking arm come mutual transmission by this arc convex surface and this roller.
Described mechanical continuous variable valve lift driving device, its further characteristics are: rocking arm is equipped with a plurality of rollers and realizes mutual transmission with the arm body of a plurality of swing arms respectively, the corresponding a plurality of valve spring assemblies of these a plurality of swing arms.
The invention has the beneficial effects as follows:
Adjust mobilizable bearing, thereby at a reciprocally swinging of swing arm in the cycle, the shared separately duration ratio of basic circle section in the cam profile of its second end and active section will change, thereby the time span of valve spring assembly axial motion and distance are changed; This axial motion time span and distance, just engine valve is opened duration and lift, can between valve maximum unlatching duration or maximum lift, regulate continuously relatively 0, mechanical continuous variable lift valve operating drive unit of the present invention can realize that valve opening duration and lift size are adjustable continuously between 0 (minimum value) and maximum value by predefined Changing Pattern, thereby play the effect of air inflow in the dynamic adjustments cylinder, when being used for petrol engine, can replace traditional closure fully, thereby reduce pumping loss greatly, obtain tangible oil-saving effect, petrol engine adopts the present invention, can also in full speed range, optimize Maximum Torque, take into account the output of low-speed big characteristic and high speed high power, thereby improved the petrol engine dynamic property energy; The present invention can also realize petrol engine variable-displacement function, greatly reduces oil consumption, and has improved Economy; Design of the present invention is unique, can be used for comprising on the motor of whole traditional valve actuation form of machinery or hydraulic tappet, roller rocker arms; Use the present invention, need not to change in a large number former engine cylinder cover, the favorable expandability of technology, use value height.
Description of drawings
Fig. 1 is the side view of mechanical continuous variable valve lift driving device of the present invention.
Fig. 2 is the stereogram of mechanical continuous variable valve lift driving device of the present invention.
Fig. 3 is the schematic representation of each working state of mechanical continuous variable valve lift driving device of the present invention, wherein (a) is the working state when minimum stroke, working state when (b) being range (c) and (d) is two working staties of basic circle section of cam profile of the far-end of corresponding swing arm.
Fig. 4 is the mechanism principle figure of mechanical continuous variable valve lift driving device of the present invention.
Embodiment
As depicted in figs. 1 and 2, mechanical continuous variable valve lift driving device of the present invention, have the tappet formula valve spring assembly or the rocking arm type valve spring assembly of special type face in order to driving, as realizing valve lift-continuously adjustable solution of unlatching duration.
Mechanical continuous variable valve lift driving device of the present invention comprises swing arm 4; Rocking arm 2; Control Shaft 3; Cam 1 and 5. swing arms 4 of return spring assembly are installed on the Control Shaft 3; Can be around Control Shaft 3 reciprocally swingings; The end face of the far-end of swing arm 4 relative its swing fulcrums (being Control Shaft 3) is cam contour; It is used for interacting with valve spring assembly 6; This cam contour for example comprises arc surface (basic circle section) and at least one section function cambered surface (active section) in the center of circle with the swing fulcrum more than a section or a section; This function cambered surface contacts with the predetermined profile of valve spring assembly 5 and takes place between action period; Valve can be according to predetermined regular movement; This arc surface and this function cambered surface rounding off; Valve spring assembly 6 can be rocker-arm or tappet formula; In the embodiment shown in Fig. 1 to 3; As example take the tappet formula; The top of tappet has this predetermined profile; Special; Should predetermined profile can be provided by roller. the arc surface of this cam contour of swing arm 4 contacts with the predetermined profile of valve spring assembly and limit action period takes place; Valve is in the inactive state (shown in Fig. 3 (c) and Fig. 3 (d)) of estimating restriction in the margin of tolerance. and swing arm 4 is the concentric circles section (when being Control Shaft 3 rotation, the central axis of this concentric circles section is fixed) that is sleeved on Control Shaft 3 in embodiment as shown in the figure.
Also be provided with arc convex surface 40 (as shown in Figure 1) on the wall body of swing arm 4.
Rocking arm 2 also is installed on the Control Shaft 3, can be around Control Shaft 3 reciprocally swingings; rocking arm 2 serves as the swing fulcrum with Control Shaft 3 also; but the oscillation center axis of the oscillation center axis of rocking arm 2 and swing arm 4 conllinear not; at Fig. 1 to embodiment shown in Figure 3; rocking arm 2 is to be sleeved on the eccentric shaft part of Control Shaft 3, and when Control Shaft 3 rotations, the oscillation center axis of rocking arm 2 can change.Control Shaft 3 is equivalent to provide a rotating bearing to rocking arm 2, and a fixed bearing is provided for swing arm 4.
Control Shaft 3 is installed in rotation on the motor, and it can also be located by motor control by driving mechanism.
Rocking arm 2 has the roller 7 that is provided with at relative far-end of its swing fulcrum, and the arc convex surface 40 on the arm body of this roller 7 and swing arm 4 contacts.One or more rollers (being in the both sides of the far-end of rocking arm 2 roller to be set respectively in embodiment as shown in the figure) also are set on the arm body of each rocking arm 2, and these rollers contact with cylndrical surface 40 on the swing arm 4 arm bodies.
Cam on the camshaft 1 contacts with the roller 7 of the far-end of rocking arm 2, and camshaft 1 can be driven through driving mechanism by engine crankshaft.
With reference to Fig. 4, in Fig. 4, Control Shaft 1 is reduced to two bearing A, B simultaneously, and bearing A fixes, and bearing B is mobilizable.After mechanical continuous variable valve lift driving device of the present invention is assembled on the motor, configurable electronic device control system, under the controlling of this control system, can make Control Shaft 3 rotations one predetermined angle, because swing arm 4 is sleeved on the eccentric shaft part of Control Shaft 3, therefore the oscillation center axis of swing arm 4 changes, thereby at a reciprocally swinging of swing arm 4 in the cycle, the shared separately duration ratio of basic circle section in the cam profile of the end face of its far-end and active section changes, thereby the time span of tappet formula valve spring assembly 6 axial motions and distance are changed.This axial motion time span and distance, just engine valve is opened duration and lift, can regulate continuously relatively between valve maximum unlatching duration or maximum lift 0.Under the ultimate angle of Control Shaft 3, the limit case of 0 lift and maximum lift (that is 0 unlatching duration and maximum unlatching the duration), mechanism position concerns respectively shown in Fig. 3 (a), Fig. 3 (b).
Claims (6)
1. mechanical continuous variable valve lift driving device, it is characterized in that, comprise swing arm, rocking arm, camshaft and return spring assembly, swing arm is that fulcrum is swung with first bearing; rocking arm is that fulcrum is swung with second bearing; second bearing is a movable bearing support; when camshaft rotates; the cam action of camshaft is on rocking arm, so that the rocking arm swing, and rocking arm acts in the swing arm simultaneously; so that the swing arm swing; the return spring assembly provides restoring force, and this restoring force acts in this swing arm, so that swing arm and rocking arm are pressed against on the camshaft.
2. mechanical continuous variable valve lift driving device as claimed in claim 1 is characterized in that:
First bearing is installed on the motor;
Second bearing is installed on the motor movably;
Swing arm has first end and second end, first end of swing arm connects first bearing, with first bearing is swing fulcrum and can the relative first bearing reciprocally swinging, second end of swing arm is the clutch end of this mechanical continuous variable valve lift driving device, has to be used for and the interactional cam profile of valve spring assembly;
Rocking arm has first end, and first end of rocking arm connects second bearing, serves as swing fulcrum and can the relative second bearing reciprocally swinging with second bearing, and rocking arm and swing arm can be carried out transmission mutually;
Camshaft is the power intake of this mechanical continuous variable valve lift driving device, is installed in rotation on the motor, comprises the cam that can carry out mutual transmission with rocking arm, and this rocking arm is between this cam and this swing arm.
3. mechanical continuous variable valve lift driving device as claimed in claim 2 is characterized in that, second end of rocking arm is equipped with can be around the roller of self rotational, and this rocking arm carries out mutual transmission with the cam and the swing arm of this camshaft respectively by this roller.
4. mechanical continuous variable valve lift driving device as claimed in claim 1 or 2, it is characterized in that, first bearing and second bearing are separately positioned on the Control Shaft, this Control Shaft is installed in rotation on the motor, first bearing is the concentric circle section of this Control Shaft, and second bearing is the eccentric circle section of this Control Shaft.
5. mechanical continuous variable valve lift driving device as claimed in claim 1 or 2, it is characterized in that; rocking arm is equipped with and can has arc convex surface on the arm body of swing arm around the roller of self rotational, and this swing arm and this rocking arm are by the mutual transmission with this roller of this arc convex surface.
6. mechanical continuous variable valve lift driving device as claimed in claim 5 is characterized in that, rocking arm is equipped with a plurality of rollers and realizes mutual transmission with the arm body of a plurality of swing arms respectively, the corresponding a plurality of valve spring assemblies of these a plurality of swing arms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101985141A CN101705851B (en) | 2009-11-10 | 2009-11-10 | Mechanical continuous variable valve lift driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101985141A CN101705851B (en) | 2009-11-10 | 2009-11-10 | Mechanical continuous variable valve lift driving device |
Publications (2)
| Publication Number | Publication Date |
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| CN101705851A true CN101705851A (en) | 2010-05-12 |
| CN101705851B CN101705851B (en) | 2012-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101985141A Active CN101705851B (en) | 2009-11-10 | 2009-11-10 | Mechanical continuous variable valve lift driving device |
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| CN (1) | CN101705851B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562207A (en) * | 2010-12-07 | 2012-07-11 | 朱譞晟 | Independently adjustable continuous variable valve timing and lift mechanism |
| CN102678214A (en) * | 2011-03-08 | 2012-09-19 | 朱譞晟 | Fully variable valve timing and lift mechanism with double independent swing rods |
| CN102678221A (en) * | 2011-03-08 | 2012-09-19 | 朱譞晟 | Fully variable valve timing and lift mechanism with double connecting rods |
| CN105909332A (en) * | 2016-05-30 | 2016-08-31 | 苏立群 | Stepless valve rocker mechanism with variable lift and corresponding valve device |
| WO2017101578A1 (en) * | 2015-12-17 | 2017-06-22 | 广州汽车集团股份有限公司 | Continuously variable valve lift system and automobile |
| CN110645063A (en) * | 2019-09-24 | 2020-01-03 | 深圳臻宇新能源动力科技有限公司 | Valve lift device and vehicle with same |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4300684C2 (en) * | 1993-01-13 | 1994-10-13 | Meta Motoren Energietech | Valve train for variable control of internal combustion engines |
| WO1994016202A1 (en) * | 1992-12-30 | 1994-07-21 | Meta Motoren- Und Energie-Technik Gmbh | Device for the variable control of the valves of internal combustion engines, especially for the chokeless load control of four-stroke engines |
| JP4108295B2 (en) * | 2001-06-14 | 2008-06-25 | 株式会社オティックス | Variable valve mechanism |
| JP4143012B2 (en) * | 2003-06-30 | 2008-09-03 | 株式会社オティックス | Variable valve mechanism |
| JP4136824B2 (en) * | 2003-08-05 | 2008-08-20 | 株式会社日立製作所 | Valve operating device for internal combustion engine and lift adjusting method for the valve operating device |
| JP2006283630A (en) * | 2005-03-31 | 2006-10-19 | Honda Motor Co Ltd | Valve gear of engine |
| JP5332148B2 (en) * | 2007-08-10 | 2013-11-06 | 日産自動車株式会社 | Engine valve mechanism |
-
2009
- 2009-11-10 CN CN2009101985141A patent/CN101705851B/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562207A (en) * | 2010-12-07 | 2012-07-11 | 朱譞晟 | Independently adjustable continuous variable valve timing and lift mechanism |
| CN102562207B (en) * | 2010-12-07 | 2016-03-09 | 朱譞晟 | The continuous variable valve timing of Independent adjustable joint and lift mechanisms |
| CN102678214A (en) * | 2011-03-08 | 2012-09-19 | 朱譞晟 | Fully variable valve timing and lift mechanism with double independent swing rods |
| CN102678221A (en) * | 2011-03-08 | 2012-09-19 | 朱譞晟 | Fully variable valve timing and lift mechanism with double connecting rods |
| CN102678214B (en) * | 2011-03-08 | 2016-03-30 | 朱譞晟 | The full Variable Valve Time of independent double swing-bar and lift mechanisms |
| WO2017101578A1 (en) * | 2015-12-17 | 2017-06-22 | 广州汽车集团股份有限公司 | Continuously variable valve lift system and automobile |
| US10415440B2 (en) | 2015-12-17 | 2019-09-17 | Guangzhou Automobile Group Co., Ltd. | Continuously variable valve lift system and automobile |
| CN105909332A (en) * | 2016-05-30 | 2016-08-31 | 苏立群 | Stepless valve rocker mechanism with variable lift and corresponding valve device |
| CN105909332B (en) * | 2016-05-30 | 2019-07-12 | 苏立群 | Electrodeless variable lift valve operating rocker arm body and corresponding valve gear |
| CN110645063A (en) * | 2019-09-24 | 2020-01-03 | 深圳臻宇新能源动力科技有限公司 | Valve lift device and vehicle with same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101705851B (en) | 2012-05-23 |
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