CN102705027A - Valve stroke variable adjusting system - Google Patents
Valve stroke variable adjusting system Download PDFInfo
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- CN102705027A CN102705027A CN2012101895518A CN201210189551A CN102705027A CN 102705027 A CN102705027 A CN 102705027A CN 2012101895518 A CN2012101895518 A CN 2012101895518A CN 201210189551 A CN201210189551 A CN 201210189551A CN 102705027 A CN102705027 A CN 102705027A
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- valve
- plunger
- finger
- camshaft
- rocker arm
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Abstract
The invention discloses a valve stroke variable adjusting system, which comprises a valve mechanism, a valve transmission set, a hydraulic gap adjustor and an adjustor power source, wherein the valve transmission set consists of a rocker arm bearing, a finger-shaped rocker arm and a camshaft; the camshaft is fixed on an engine cylinder through a bearing; one end of the finger-shaped rocker arm is provided with an arc groove and is in contact connection with the head of a plunger of the hydraulic gap adjustor; the middle section of the finger-shaped rocker arm is provided with the rocker arm bearing which is in rolling contact with the camshaft; the other end of the finger-shaped rocker arm is finger-shaped and presses a valve; and the camshaft rotates to drive the finger-shaped rocker arm to swing around the head of the plunger so as to control the valve to open or close. A step motor drives the hydraulic gap adjustor to move and the opening of the valve is changed, so that the air inflow is controlled, and the fuel efficiency is improved. The rocker arm bearing can reduce the impact and vibration in the transmission process and reduce noise.
Description
Technical field
The invention belongs to technical field of automobile engine, be specifically related to a kind of lift range variable regulating system.
Background technique
The employing of lift range variable (VVL) makes motor can both be met the valve lift of demand in high velocity and low velocity zone, thereby improves high engine speeds power and low speed torque.The lift range variable technology is also having its special advantages aspect energy-conservation and the environmental protection when promoting engine performance significantly.Continuous variable formula valve lift can be done stepless and regulate valve opening in certain zone, drive to get up will have no rude sense like this, and travelling comfort is strong, and the adaptability of distribution device under each rotating speed is also stronger, can improve the motor charging efficiency to greatest extent.
Traditional petrolic valve lift is fixing immutable, so just can not make motor all obtain good response in high velocity and low velocity zone.The valve lift design of conventional gasoline engin is that the balance of motor under full operating mode selected.Consequently motor both can not get best high speed efficient, also can not get best low speed torque.
Existing Chinese patent CN102364065A also is the device that a kind of lift range variable is regulated; But this patent is to utilize the rotatable eccentric shaft that is embedded in the cylinder head to regulate valve opening; Complex structure is installed and the control difficulty, can not accurately control valve opening continuously.
Summary of the invention
The objective of the invention is the deficiency to above-mentioned existing technology, provide a kind of have simple in structure, can the accurate continuously lift range variable regulating system that regulate valve lift.
The technological scheme that adopts for solving the problems of the technologies described above is:
A kind of lift range variable regulating system mainly is made up of valve mechanism 1, valve transmission group 2, hydraulic lash adjuster 3 and regulator power source 4.As fulcrum, camshaft 22 rotates and drives finger type rocker 21 swings finger type rocker 21 in the described valve transmission group 2 with hydraulic lash adjuster 3, thereby realizes the unlatching and the closure of valve mechanism 1.When car speed changes; Stepper motor 41 driven gears 40 in the control system controlled adjuster power source 4 rotate; Through the engagement of gear rack, accurately adjust the position of hydraulic lash adjuster 3 continuously, promptly change the position of the fulcrum in the lever; Thereby change the amplitude of fluctuation of finger type rocker 21, realize the variation of valve lift.
Described valve mechanism 1 is made up of cylinder head 10, valve guide bushing 11, valve 12, valve spring 13, cotter seat 14 and locking plate 15.Cylinder head 10 is connected with engine cylinder-body, and valve guide bushing 11 play the guiding role, and assurance valve 12 is done straight reciprocating motion, and valve 12 and cotter seat 14 can correctly be fitted.The top of valve spring 13 is connected with cotter seat 14, and the bottom of valve spring 13 is fixed on the engine cylinder-body, and valve spring 13 is in compressive state when valve 12 is opened, can guarantee valve 12 timely returns.Locking plate 15 is fixed between valve 12 and the cotter seat 14, realizes the seal action of the head of cotter seat 14 and valve 12 to cylinder.The effect of valve spring 13 is to overcome the inertial force that closes valve 12 and driving component in the closed procedures at valve 12; Prevent that the effect because of inertial force produces the gap between each driving component; The assurance valve is in time taken a seat and is fitted tightly, and anti-air-stop gate 12 vibrates, and destroys its sealing.
Described valve transmission group 2 is made up of rocker bearing 20, finger type rocker 21 and camshaft 22.On engine cylinder-body, an end of finger type rocker 21 has arc-shaped groove through bearing fixing for camshaft 22, is connected with the head contact of the plunger 31 of hydraulic lash adjuster 3; The stage casing of finger type rocker 21 is equipped with rocker bearing 20, and rocker bearing 20 rolls with camshaft 22 and contacts, and the other end of finger type rocker 21 is a finger-shaped; Pushing valve 12; Thereby make finger type rocker 21 with hydraulic lash adjuster 3 as fulcrum, along with the rotation of camshaft 22, finger type rocker 21 is swung around the head of plunger 31; Finger-shaped one end of pushing valve 12 swings up and down, and then the switching of control valve 12.
Described hydraulic lash adjuster 3 is made up of housing 30, plunger 31, one-way valve 32, Returnning spring 33, spring retainer 34, check ball 35.Hydraulic oil is pushed check ball 35 open from filler opening one side inflow of one-way valve 32 under oil pressure, open one-way valve 32, and hydraulic oil gets in the cavity of plunger 31, stretches out at the effect lower plunger 31 of Returnning spring 33 and oil pressure; When the outside is big to the active force of plunger 21, plunger 31 withdrawals, check ball 35 is blocked filler opening, and hydraulic oil can not return from former road, reveals from the gap between plunger 31 and the housing 30, and plunger 31 is slowly withdrawn.Tooth bar is processed or be installed with to one side of housing 30.
Described regulator power source 4 is made up of gear 40 and stepper motor 41.Stepper motor 41 is fixed on the engine cylinder-body, by stepper motor 41 actuation gears 40, meshes through the tooth bar on gear 40 and the housing 30, thereby accurately adjusts the position of hydraulic lash adjuster 3 continuously.
Beneficial effect of the present invention is: constant hydraulic coupling can be regulated the extending amount of hydraulic lash adjuster; The position of the regulator power source control hydraulic lash adjuster that stepper motor drives; Can change the aperture of motor valve under different rotating speeds; Thereby the control air inflow helps improving fuel efficiency.Adopt rocker bearing can alleviate the shock and vibration in the transmission process, reduce noise.
Description of drawings
Fig. 1 is the overall erection drawing of lift range variable regulating system
Fig. 2 is the structure diagram of valve mechanism 1 among Fig. 1
Fig. 3 is the structure diagram of valve transmission group 2 among Fig. 1
Fig. 4 is the erection drawing of hydraulic lash adjuster 3 among Fig. 1
Fig. 5 is the structure diagram of regulator power source 4 among Fig. 1
1, valve mechanism; 10, cylinder head; 11, valve guide bushing; 12, valve; 13, valve spring; 14, cotter seat; 15, locking plate.
2, valve transmission group; 20, rocker bearing; 21, refer to adorn rocking arm; 22, camshaft.
3, hydraulic lash adjuster; 30, housing; 31, plunger; 32, one-way valve; 33, Returnning spring; 34, spring retainer; 35, check ball.
4, regulator power source; 40, gear; 30, housing (racks processed on housing); 41, stepper motor.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in detail.
Fig. 1 is an overall erection drawing of the present invention, and visible a kind of novel changable valve lift regulating system of the present invention mainly is made up of valve mechanism 1, valve transmission group 2, hydraulic lash adjuster 3 and regulator power source 4.As fulcrum, camshaft 22 rotates and drives finger type rocker 21 swings finger type rocker 21 in the described valve transmission group 2 with hydraulic lash adjuster 3, thereby realizes the unlatching and the closure of valve mechanism 1.When car speed changes; Stepper motor 41 driven gears 40 in the control system controlled adjuster power source 4 rotate; Through the engagement of gear rack, accurately adjust the position of hydraulic lash adjuster 3 continuously, promptly change the position of the fulcrum in the lever; Thereby change the amplitude of fluctuation of finger type rocker 21, realize the variation of valve lift.
Fig. 2 is the structure diagram of valve mechanism 1, and described valve mechanism 1 is made up of cylinder head 10, valve guide bushing 11, valve 12, valve spring 13, cotter seat 14 and locking plate 15.Cylinder head 10 is connected with engine cylinder-body, and valve guide bushing 11 play the guiding role, and assurance valve 12 is done straight reciprocating motion, and valve 12 and cotter seat 14 can correctly be fitted.The top of valve spring 13 is connected with cotter seat 14, and the bottom of valve spring 13 is fixed on the engine cylinder-body, and valve spring 13 is in compressive state when valve 12 is opened, can guarantee valve 12 timely returns.Locking plate 15 is fixed between valve 12 and the cotter seat 14, realizes the seal action of the head of cotter seat 14 and valve 12 to cylinder.The effect of valve spring 13 is to overcome the inertial force that closes valve 12 and driving component in the closed procedures at valve 12; Prevent that the effect because of inertial force produces the gap between each driving component; The assurance valve is in time taken a seat and is fitted tightly, and anti-air-stop gate 12 vibrates, and destroys its sealing.
Fig. 3 is the structure diagram of valve transmission group 2, and described valve transmission group 2 is made up of rocker bearing 20, finger type rocker 21 and camshaft 22.On engine cylinder-body, an end of finger type rocker 21 has arc-shaped groove through bearing fixing for camshaft 22, is connected with the head contact of the plunger 31 of hydraulic lash adjuster 3; The stage casing of finger type rocker 21 is equipped with rocker bearing 20, and rocker bearing 20 rolls with camshaft 22 and contacts, and the other end of finger type rocker 21 is a finger-shaped; Pushing valve 12; Thereby make finger type rocker 21 with hydraulic lash adjuster 3 as fulcrum, along with the rotation of camshaft 22, finger type rocker 21 is swung around the head of plunger 31; Finger-shaped one end of pushing valve 12 swings up and down, and then the switching of control valve 12.
Fig. 4 is the erection drawing of hydraulic lash adjuster 3, and described hydraulic lash adjuster 3 is made up of housing 30, plunger 31, one-way valve 32, Returnning spring 33, spring retainer 34, check ball 35.Hydraulic oil is pushed check ball 35 open from filler opening one side inflow of one-way valve 32 under oil pressure, open one-way valve 32, and hydraulic oil gets in the cavity of plunger 31, stretches out at the effect lower plunger 31 of Returnning spring 33 and oil pressure; When the outside is big to the active force of plunger 21, plunger 31 withdrawals, check ball 35 is blocked filler opening, and hydraulic oil can not return from former road, reveals from the gap between plunger 31 and the housing 30, and plunger 31 is slowly withdrawn.Tooth bar is processed or be installed with to one side of housing 30.
Fig. 5 is the structure diagram of regulator power source 4, and described regulator power source 4 is made up of gear 40 and stepper motor 41.Stepper motor 41 is fixed on the engine cylinder-body, by stepper motor 41 actuation gears 40, meshes through the tooth bar on gear 40 and the housing 30, thereby accurately adjusts the position of hydraulic lash adjuster 3 continuously.
Claims (5)
1. a lift range variable regulating system includes valve mechanism (1) and valve transmission group (2), it is characterized in that: also include hydraulic lash adjuster (3) and regulator power source (4); Regulator power source (4) drives hydraulic lash adjuster (3) translation, and then the amplitude of fluctuation of adjustment valve transmission group (2), realizes valve (12) lift variation in the valve mechanism (1).
2. a kind of lift range variable regulating system according to claim 1; It is characterized in that: described valve transmission group (2) is made up of rocker bearing (20), finger type rocker (21) and camshaft (22); Camshaft (22) passes through bearing fixing on engine cylinder-body; One end of finger type rocker (21) has arc-shaped groove, is connected with the head contact of the plunger (31) of hydraulic lash adjuster (3), and the stage casing of finger type rocker (21) is equipped with rocker bearing (20); rocker bearing (20) rolls with camshaft (22) and contacts; the other end of finger type rocker (21) is a finger-shaped, is pushing valve (12), and the rotation drive finger type rocker (21) of camshaft (22) is swung around the head of plunger (31); finger-shaped one end of pushing valve (12) swings up and down, and then controls the switching of valve (12);
Stepper motor (41) driven gear (40) in the described regulator power source (4) rotates; Engagement through gear rack; Accurately adjust the position of hydraulic lash adjuster (3) continuously; Promptly change the position of the fulcrum in the lever, thereby change the amplitude of fluctuation of finger type rocker (21), realize the variation of valve (12) lift in the valve mechanism (1).
3. a kind of lift range variable regulating system according to claim 2; It is characterized in that: described valve mechanism (1) is made up of cylinder head (10), valve guide bushing (11), valve (12), valve spring (13), cotter seat (14) and locking plate (15); Cylinder head (10) is connected with engine cylinder-body; Valve guide bushing (11) play the guiding role, and assurance valve (12) is done straight reciprocating motion, and valve (12) and cotter seat (14) can correctly be fitted; The top of valve spring (13) is connected with cotter seat (14); The bottom of valve spring (13) is fixed on the engine cylinder-body; Valve spring (13) is in compressive state when valve (12) is opened, locking plate (15) is fixed between valve (12) and the cotter seat (14).
4. a kind of lift range variable regulating system according to claim 2; It is characterized in that: described hydraulic lash adjuster (3) is made up of housing (30), plunger (31), one-way valve (32), Returnning spring (33), spring retainer (34) and check ball (35); Hydraulic oil is from filler opening one side inflow of one-way valve (32); Under oil pressure, push check ball (35) open; Open one-way valve (32), hydraulic oil gets in the cavity of plunger (31), stretches out at the effect lower plunger (31) of Returnning spring (33) and oil pressure; When the outside is big to the active force of plunger (21); Plunger (31) withdrawal; Check ball (35) is blocked filler opening, and hydraulic oil can not return from former road, reveals from the gap between plunger (31) and the housing (30); Make slowly withdrawal of plunger (31), tooth bar is processed or be installed with to a side of housing (30).
5. a kind of lift range variable regulating system according to claim 4; It is characterized in that: described regulator power source (4) is made up of gear (40) and stepper motor (41); Stepper motor (41) is fixed on the engine cylinder-body,, stepper motor (41) actuation gear (40) rotates; Tooth bar through on gear (40) and the housing (30) meshes, and accurately adjusts the position of hydraulic lash adjuster (3) continuously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101895518A CN102705027A (en) | 2012-06-11 | 2012-06-11 | Valve stroke variable adjusting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101895518A CN102705027A (en) | 2012-06-11 | 2012-06-11 | Valve stroke variable adjusting system |
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| CN102705027A true CN102705027A (en) | 2012-10-03 |
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|---|---|---|---|
| CN2012101895518A Pending CN102705027A (en) | 2012-06-11 | 2012-06-11 | Valve stroke variable adjusting system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847435A (en) * | 2014-05-29 | 2015-08-19 | 北汽福田汽车股份有限公司 | Valve timing mechanism of engine, engine and vehicle |
| CN105781656A (en) * | 2016-04-23 | 2016-07-20 | 吉林大学 | Mechanical adjusting device of hydraulic drive type fully-variable valve |
| CN106321182A (en) * | 2015-06-29 | 2017-01-11 | 上海高斯通船舶配件有限公司 | Mechanical valve lift adjusting and buffering device for internal combustion engine |
| CN106499461A (en) * | 2016-12-30 | 2017-03-15 | 广东技术师范学院 | A kind of engine charge blocks energy-saving mechanism |
| CN108691596A (en) * | 2018-07-03 | 2018-10-23 | 吉林大学 | A kind of automobile engine variable valve lift control system |
| CN115898585A (en) * | 2022-12-10 | 2023-04-04 | 吉林大学 | Motor-driven variable-length tappet variable valve lift mechanism |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0452671A2 (en) * | 1990-03-14 | 1991-10-23 | Suzuki Kabushiki Kaisha | Valve actuating mechanism in four-stroke cycle engine |
| JP2006274864A (en) * | 2005-03-28 | 2006-10-12 | Toyota Motor Corp | Diaphragm and lash adjuster |
| CN1900491A (en) * | 2006-07-20 | 2007-01-24 | 姬腾飞 | Timing and lift continuous changeable device for engine air valve |
| CN101907001A (en) * | 2010-07-23 | 2010-12-08 | 高伟 | Stepless variable valve lift mechanism |
-
2012
- 2012-06-11 CN CN2012101895518A patent/CN102705027A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0452671A2 (en) * | 1990-03-14 | 1991-10-23 | Suzuki Kabushiki Kaisha | Valve actuating mechanism in four-stroke cycle engine |
| JP2006274864A (en) * | 2005-03-28 | 2006-10-12 | Toyota Motor Corp | Diaphragm and lash adjuster |
| CN1900491A (en) * | 2006-07-20 | 2007-01-24 | 姬腾飞 | Timing and lift continuous changeable device for engine air valve |
| CN101907001A (en) * | 2010-07-23 | 2010-12-08 | 高伟 | Stepless variable valve lift mechanism |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847435A (en) * | 2014-05-29 | 2015-08-19 | 北汽福田汽车股份有限公司 | Valve timing mechanism of engine, engine and vehicle |
| CN106321182A (en) * | 2015-06-29 | 2017-01-11 | 上海高斯通船舶配件有限公司 | Mechanical valve lift adjusting and buffering device for internal combustion engine |
| CN106321182B (en) * | 2015-06-29 | 2018-11-27 | 上海高斯通船舶配件有限公司 | Internal combustion engine mechanical valve lift adjusts buffer unit |
| CN105781656A (en) * | 2016-04-23 | 2016-07-20 | 吉林大学 | Mechanical adjusting device of hydraulic drive type fully-variable valve |
| CN105781656B (en) * | 2016-04-23 | 2017-12-01 | 吉林大学 | A kind of mechanic adjustment unit of the full changeable air valve of hydraulic drive type |
| CN106499461A (en) * | 2016-12-30 | 2017-03-15 | 广东技术师范学院 | A kind of engine charge blocks energy-saving mechanism |
| CN108691596A (en) * | 2018-07-03 | 2018-10-23 | 吉林大学 | A kind of automobile engine variable valve lift control system |
| CN108691596B (en) * | 2018-07-03 | 2023-10-03 | 吉林大学 | Variable valve lift control system of automobile engine |
| CN115898585A (en) * | 2022-12-10 | 2023-04-04 | 吉林大学 | Motor-driven variable-length tappet variable valve lift mechanism |
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Application publication date: 20121003 |