CN102797531B - Device capable of changing valve lift - Google Patents
Device capable of changing valve lift Download PDFInfo
- Publication number
- CN102797531B CN102797531B CN201210317872.1A CN201210317872A CN102797531B CN 102797531 B CN102797531 B CN 102797531B CN 201210317872 A CN201210317872 A CN 201210317872A CN 102797531 B CN102797531 B CN 102797531B
- Authority
- CN
- China
- Prior art keywords
- motor
- rocking arm
- rocker arm
- cam
- chute
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
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- Valve Device For Special Equipments (AREA)
Abstract
The invention discloses a device capable of changing valve lift. The device comprises a rocker arm, a hydraulic tappet for supporting the rocker arm, a cam, and a valve driven by the rocker arm, wherein a guide slot and a chute are formed in the rocker arm in the length direction; an engaging tooth is arranged on the lower wall surface of the guide slot; a roller driven member abutting on the cam is movably arranged on the rocker arm; a gear matched with the engaging tooth is arranged on a rotary shaft of the roller driven member; the rotary shaft is connected with an output shaft of a motor; and a sliding rod matched with the chute in a sliding manner is arranged on a casing of the motor. The position of the roller driven member in the rocker arm can be changed by utilizing the motor to drive the roller driven member to slide in the guide slot, so that the swing of the rocker arm when the cam is started is changed; and therefore, the valve lift is changed. The device has the advantages that the structure of a cylinder cover is changed slightly, and the height of an engine is not increased, thereby being suitable for various engines.
Description
Technical field
The invention belongs to engine art, relate to a kind of valve control apparatus, relate in particular to a kind of device of lift range variable.
Background technique
Lift range variable technology can be improved the service behaviour of motor, in the time of the slow-speed of revolution, can reduce valve lift and valve-opening time, thereby raising induction air flow ratio, avoids refluxing, in the time of high rotating speed, can improve valve lift and valve-opening time, thereby ensure the abundance of air inlet.The motor with such lift range variable technology has larger structural change than traditional motor, larger to the change of cylinder cap, has increased the height of motor.
Summary of the invention
The technical problem to be solved in the present invention, is to provide a kind of device of lift range variable, and its structure and conventional engines are close, little to the structural modification of cylinder cap, can not increase the height of motor.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of device of lift range variable, comprise rocking arm, for supporting hydraulic tappet, the cam of rocking arm, and the valve being driven by rocking arm, on rocking arm, be furnished with along its length guiding groove and chute, the lower wall surface of guiding groove is provided with engaging tooth, on rocking arm, be also provided with movably the roller follower contacting with cam, the rotating shaft of roller follower is provided with the gear coordinating with engaging tooth, described rotating shaft is connected with the output shaft of motor, and the shell of described motor is provided with the slide bar being slidably matched with chute.
As limitation of the invention, the rear and front end of described motor is equipped with output shaft, is connected respectively with the rotating shaft of adjacent roller follower.
As to another kind of restriction of the present invention, in the middle part of described rocking arm, be groove, roller follower is arranged in groove.
The present invention also has a kind of restriction, and described guiding groove and chute are lower protruding curve bath.
Owing to having adopted above-mentioned technological scheme, the present invention compared with prior art, obtained technological progress is: the device of lift range variable provided by the present invention, slide in guiding groove by driven by motor roller follower, can change the position of roller follower in rocking arm, thereby change the amplitude of oscillation of rocking arm under cam starts, valve lift is changed, it is little to the change of cylinder cap, can not increase the height of motor; Motor two ends arrange output shaft can simplified structure, saves the quantity that uses motor; Roller follower is arranged in groove, can make roller follower both sides be supported, and increases its stability; Guiding groove and chute are set to curve bath, can reduce and the variation of the distance of cam, make itself and cam keep well contacting.
The present invention is applicable to various motors.
The present invention is described in further detail below in conjunction with Figure of description and specific embodiment.
Brief description of the drawings
Fig. 1 is the overall structure schematic diagram of the embodiment of the present invention;
Fig. 2 is the schematic diagram that middle rocking arm 1 embodiment illustrated in fig. 1 coordinates with roller follower 5;
Fig. 3 is the use view being applied in multicylinder engine embodiment illustrated in fig. 1.
In figure: 1-rocking arm, 11-guiding groove, 115-engaging tooth, 12-chute, 2-hydraulic tappet, 3-cam, 4-valve, 5-roller follower, 52-gear, 6-motor.
Embodiment
Embodiment
Referring to figs. 1 to Fig. 3, the device that the present embodiment is a kind of lift range variable, on hydraulic tappet 2, support and connection have rocking arm 1, and rocking arm 1 is connected with valve 4, drives valve 4 to move.
The middle part of rocking arm 1 is groove 13.
On the sidewall of rocking arm 1, be provided with guiding groove 11 and the chute 12 arranged along its length, the lower wall surface of guiding groove 11 is provided with engaging tooth 115.
Be provided with roller follower 5 in groove 13 inside, this roller follower 5 is for contacting at cam 3, the two ends of roller follower 5 are provided with rotating shaft, gear 52 coaxially arranged in rotating shaft is meshed with engaging tooth 115, make this roller follower 5 be supported on rocking arm 1 simultaneously, can on rocking arm 1, roll.
The rotating shaft of roller follower 5 is connected with the output shaft of motor 6, thereby can be driven in the time that motor 6 rotates.On the shell of motor 6, be provided with a slide bar 61, this slide bar 61 is inserted in chute 12, thus in the time that motor 6 rotates for it provides reaction force.
For conserve space, save the quantity of motor 6, the rear and front end of motor 6 is all arranged to output shaft, thereby can be connected with the rotating shaft of adjacent roller follower 5, in multicylinder engine, be convenient to layout.
The present embodiment in use, motor 6 forwards, drive roller follower 5 near hydraulic tappet 2, the hunting range that makes rocking arm 1 is increased, increase valve 4 lifts and valve 4 opening times, when motor 6 reverses, drive roller follower 5 away from hydraulic tappet 2, thereby the hunting range of rocking arm 1 is reduced, reduce valve 4 lifts and valve 4 opening times.
Claims (4)
1. the device of a lift range variable, comprise rocking arm, for supporting hydraulic tappet, the cam of rocking arm, and the valve being driven by rocking arm, it is characterized in that: on rocking arm, be furnished with along its length guiding groove and chute, the lower wall surface of guiding groove is provided with engaging tooth, is also provided with movably the roller follower contacting with cam on rocking arm, and the rotating shaft of roller follower is provided with the gear matching with engaging tooth;
The device of described lift range variable also comprises motor, and described rotating shaft is connected with the output shaft of motor, and the shell of described motor is provided with the slide bar being slidably matched with chute.
2. the device of lift range variable according to claim 1, is characterized in that: the rear and front end of described motor is equipped with output shaft, is connected respectively with the rotating shaft of adjacent roller follower.
3. the device of lift range variable according to claim 1, is characterized in that: described rocking arm middle part is groove, and roller follower is arranged in groove.
4. according to the device of the lift range variable described in any one in claims 1 to 3, it is characterized in that: described guiding groove and chute are lower protruding curve bath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210317872.1A CN102797531B (en) | 2012-08-31 | 2012-08-31 | Device capable of changing valve lift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210317872.1A CN102797531B (en) | 2012-08-31 | 2012-08-31 | Device capable of changing valve lift |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102797531A CN102797531A (en) | 2012-11-28 |
| CN102797531B true CN102797531B (en) | 2014-10-01 |
Family
ID=47196803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210317872.1A Expired - Fee Related CN102797531B (en) | 2012-08-31 | 2012-08-31 | Device capable of changing valve lift |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102797531B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103726897B (en) * | 2013-12-30 | 2016-12-07 | 长城汽车股份有限公司 | For the valve actuating mechanism of electromotor and the vehicle with it |
| US10450902B2 (en) * | 2016-12-02 | 2019-10-22 | GT Technologies | Finger follower assembly for use in a valvetrain of an internal combustion engine |
| CN106761999B (en) * | 2016-12-13 | 2019-08-20 | 辽宁工业大学 | A kind of continuous variable rocker-arm valve mechanism |
| CN108757085B (en) * | 2018-08-10 | 2023-06-09 | 芜湖钻石航空发动机有限公司 | Variable valve lift structure and control method thereof |
| CN109667637B (en) * | 2018-12-27 | 2020-06-02 | 潍柴动力股份有限公司 | Variable valve lift structure, vehicle and engine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4220816A1 (en) * | 1992-06-25 | 1994-01-05 | Schaeffler Waelzlager Kg | Adjustable valve control for IC engine - has adjustable intermediate member between cam and pivot lever along guide path |
| DE19960742A1 (en) * | 1999-12-16 | 2001-06-21 | Iav Gmbh | Variable valve drive, preferably for combustion engine, has pressure roller rotatably mounted in swinging arm with pivot axis fixed relative to cylinder head but adjustable in position |
| US6491008B1 (en) * | 2001-10-18 | 2002-12-10 | Ford Global Technologies, Inc. | Variable valve timing adjustable roller rocker arm assembly |
| US6550435B1 (en) * | 2002-01-17 | 2003-04-22 | Ford Global Technologies, Llc | Variable valve timing adjustable finger follower assembly |
| CN1900491A (en) * | 2006-07-20 | 2007-01-24 | 姬腾飞 | Timing and lift continuous changeable device for engine air valve |
| CN101403326A (en) * | 2008-06-16 | 2009-04-08 | 奇瑞汽车股份有限公司 | Variable air valve lift range mechanism of internal combustion engine |
-
2012
- 2012-08-31 CN CN201210317872.1A patent/CN102797531B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4220816A1 (en) * | 1992-06-25 | 1994-01-05 | Schaeffler Waelzlager Kg | Adjustable valve control for IC engine - has adjustable intermediate member between cam and pivot lever along guide path |
| DE19960742A1 (en) * | 1999-12-16 | 2001-06-21 | Iav Gmbh | Variable valve drive, preferably for combustion engine, has pressure roller rotatably mounted in swinging arm with pivot axis fixed relative to cylinder head but adjustable in position |
| US6491008B1 (en) * | 2001-10-18 | 2002-12-10 | Ford Global Technologies, Inc. | Variable valve timing adjustable roller rocker arm assembly |
| US6550435B1 (en) * | 2002-01-17 | 2003-04-22 | Ford Global Technologies, Llc | Variable valve timing adjustable finger follower assembly |
| CN1900491A (en) * | 2006-07-20 | 2007-01-24 | 姬腾飞 | Timing and lift continuous changeable device for engine air valve |
| CN101403326A (en) * | 2008-06-16 | 2009-04-08 | 奇瑞汽车股份有限公司 | Variable air valve lift range mechanism of internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102797531A (en) | 2012-11-28 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141001 |
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| CF01 | Termination of patent right due to non-payment of annual fee |