CN104329136A - Continuously-variable valve lift control device - Google Patents
Continuously-variable valve lift control device Download PDFInfo
- Publication number
- CN104329136A CN104329136A CN201410456586.2A CN201410456586A CN104329136A CN 104329136 A CN104329136 A CN 104329136A CN 201410456586 A CN201410456586 A CN 201410456586A CN 104329136 A CN104329136 A CN 104329136A
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- CN
- China
- Prior art keywords
- valve lift
- guide rail
- roller
- variable valve
- rocking arm
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
The invention discloses a continuously-variable valve lift control device, and belongs to a variable valve lift control device of an engine system. A guide rail is arranged in vertical guide grooves of sliding sleeves; a cam is in contact with a guide rail pin roller arranged on the top of the guide rail; an air valve and a hydraulic tappet are arranged at the two ends of a rocker arm respectively; an adjusting pin roller is arranged in a horizontal guide groove in the bottom of the guide rail, and is in tight contact with the rocker arm; a worm is arranged on a stepping motor shaft; a fan-shaped worm wheel on the lower part of the rocker arm is meshed with the worm; the upper end of the rocker arm is hinged to the left end of a control rod positioned in the horizontal direction; the right end of the control rod is fixed on a shaft of the adjusting pin roller; a cone fixed on an engine body is pressed against the right side of a swing arm, thereby forming a supporting point. According to the device, the lift of the air valve in the conventional valve lift mechanism is adjusted more finely, and the valve lift control accuracy is increased, so that active control of the valve lift in the all-condition range of the engine can be realized.
Description
Technical field
The present invention relates to car combustion engine field, particularly relate to the machine control unit of the lift range variable of internal combustion (IC) engine air-inlet-exhaust system.
Background technique
For motor, inlet and exhaust system is the equal of just respiratory system.The combination property of motor is very large by the impact of inlet and exhaust system.Especially for vehicular engine, its work load range and speed range all wider, and the change of load and rotating speed is relatively frequent, and therefore the performance of inlet and exhaust system is very large for the impact of Vehicular internal combustion engine.
Lift range variable technology is the hot technology that in recent years one is conducive to promoting engine breathing performance, the lift that this technology changes valve according to operating mode can reduce pumping loss, is conducive to the power character, the Economy and discharge etc. that improve motor.Said continuously variable valve lift technology is that a kind of valve lift amount of motor that can make is determining to realize continually varying technology within scope, to meet motor under different rotating speeds and load to current-controlled requirement.Continuously variable valve lift technology can realize continuous print and control in whole engine operating condition excursion, therefore controls more flexibly comprehensively.
Although the lift range variable control technique put forward at present is more, all come with some shortcomings, the lift range variable technology as hydraulic pressure class can make control accuracy not high due to problems such as the compressibility of hydraulic oil, controls difficulty also very large simultaneously.And for example air valve lift range mechanism disclosed in patent CN103437850A, relatedly change valve timing, and timing is uncontrollable while the lift changed.
Summary of the invention
The object of this invention is to provide the continuously variable valve lift control gear that a kind of valve lift control accuracy is higher.
The object of the present invention is achieved like this: a kind of continuously variable valve lift control gear, comprise, be arranged in the vertical guiding groove of sliding sleeve slide, the guide track roller that cam is installed with rail crown contacts, valve and hydraulic tappet are arranged on below rocking arm two ends respectively, it is characterized in that, regulate roller to be slidably arranged in the horizontal guide slot bottom described guide rail, regulate roller be positioned at above described rocking arm, and with rocking arm compressive contact; The transmission shaft of stepper motor is provided with worm screw, the worm sector of swing arm bottom is meshed with worm screw; rocking arm upper end is hinged with the left end of the controlling rod being positioned at substantially horizontal through hinge; controlling rod right-hand member is fixed on the axle of adjustment roller, and the cone be fixed on engine body leans and form fulcrum on the right side of swing arm.
Described controlling rod right-hand member is fixed on the center (i.e. cylindrical body shaft core position) regulating roller.
The right-hand member of described controlling rod also has a section straight up, and the end of this section straight up fixes with regulating the center of roller.
Compared with prior art, the invention has the beneficial effects as follows:
1. relatively original air valve structure, the component of increase are less, and structure is simple.
2. use worm gear structure, utilize the larger feature of its velocity ratio to improve control accuracy further.
3. use worm gear structure, utilize it to have the feature of auto-lock function, any other measure need not carry out the regulatory function of retaining mechanism after having regulated, reduction energy consumption.
4. do not change the structural relation of hydraulic tappet, rocking arm and valve itself, the improvement of mechanism can be reduced.
5. do not change the structural relation of hydraulic tappet, rocking arm and valve itself, better reliability in the adjustment process of whole mechanism.
6. this control gear can not on producing any impact valve timing while change lift, therefore can with other valve timing mechanisms with the use of.
This device can be done to be more meticulous adjustment to the lift of valve in existing air valve lift range mechanism, improves valve lift control accuracy, thus can realize the valve lift ACTIVE CONTROL within the scope of motor full working scope.
Accompanying drawing explanation
Fig. 1 is continuously variable valve lift control gear in a state of nature.
Fig. 2 is in the continuously variable valve lift control gear increasing lift condition.
Fig. 3 is in the continuously variable valve lift control gear reducing lift condition.
Fig. 4, Fig. 5 are plan view and the plan view (shown in plan view horizontal guide slot) of guide rail shown in Fig. 1 respectively.
Fig. 6, Fig. 7 are plan view and the plan view (shown in plan view vertical guiding groove) of sliding sleeve shown in Fig. 1 respectively.
Fig. 8, Fig. 9 are the plan view and the plan view that regulate roller shown in Fig. 1 respectively.
Embodiment
In order to further illustrate working principle and the controlling method of continuous variable air valve lift apparatus, existing composition graphs carries out citing and sets forth.
Be illustrated in figure 1 continuously variable valve lift control gear in a state of nature, continuously variable valve lift control gear comprises: valve 1, rocking arm 2, sliding sleeve 3, guide rail 4, guide track roller 5, cam 6, adjustment roller 7, controlling rod 8, hinge 9, swing arm 10, cone 11, worm screw 12, transmission shaft 13, stepper motor 14 and hydraulic tappet 15.
Fig. 1 illustrates a kind of continuously variable valve lift control gear, guide rail 4 is slidably arranged in sliding sleeve 3(and engine block is fixed together) vertical guiding groove in, the guide track roller 5 that cam 6 is installed with guide rail 4 top contacts, valve 1 and hydraulic tappet 15 are arranged on below rocking arm 2 two ends respectively, roller 7 is regulated to be slidably arranged in the horizontal guide slot bottom described guide rail 4, regulate roller be positioned at above described rocking arm 2, and with rocking arm 2 compressive contact; The transmission shaft 13 of stepper motor 14 is provided with worm screw 12, the worm sector of swing arm 10 bottom is meshed with worm screw 12; rocking arm upper end is hinged with the left end of the controlling rod 8 being positioned at substantially horizontal through hinge 9; controlling rod 8 right-hand member is fixed on the axle of adjustment roller 7, and the cone 11 be fixed on engine body leans on the right side of swing arm 10 and forms fulcrum.Controlling rod 8 right-hand member is fixed on the center regulating roller 7.The right-hand member of controlling rod 8 also has a section straight up, and the end of this section straight up fixes with regulating the center of roller 7.
Hydraulic tappet 15 and valve 1 are arranged on the two ends of rocking arm 2 respectively in the same way, and rocking arm 2 can swing around the contact of hydraulic tappet 15 with rocking arm 2.Rocking arm 2 carries out the transmission of force and motion by the adjustment roller 7 between rocking arm 2 and guide rail 4 and guide rail 4, linear reciprocating motion can be done in the guiding groove wherein regulating roller 7 to be placed in guide rail 4 in guiding groove, guiding groove is substantially horizontal, regulates roller 7 and rocking arm 2 compressive contact.Guide rail 4 both ends of the surface are parallel to each other, and guide rail 4 to be placed in sliding sleeve 3 and can to do the linear reciprocating motion of vertical direction in sliding sleeve 3.Guide rail 4 is contacted with cam 6 by the guide track roller 5 be arranged on guide rail 4, the force and motion of cam 6 is passed to guide rail 4 by guide track roller 5, the convert rotational motion of cam 6 is the linear reciprocating motion of guide rail 4 in the vertical direction by guide rail 4 and guide track roller 5, the linear reciprocating motion of guide rail 4 passes to rocking arm 2 by regulating roller 7, and promotes rocking arm 2 and swing.
Force and motion is passed to worm screw 12 by transmission shaft 13 by stepper motor 14, and the transmission of force and motion is carried out in worm screw 12 and swing arm 10 by being processed to worm gear swing arm head, and forward and reverse rotary motion of stepper motor 14 is become the reciprocally swinging of swing arm 10.Swing arm 10 is fixed on engine body by cone 11, and the other end of swing arm 10 is linked together by hinge 9 and controlling rod 8, and the other end of controlling rod 8 is fixed together with regulating the center of roller 7.
The working procedure of continuously variable valve lift control gear is achieved in that cam 6 carries out set rule and is rotated, and when cam 6 starts there is lift, cam 6 will promote guide track roller 5, and then promotes guide rail 4.Because guide rail 4 is placed in the linear reciprocating motion that also can only do vertical direction in sliding sleeve 3, therefore the rotary motion of cam 6 becomes linear reciprocating motion by guide rail 4.Be placed in adjustment roller 7 in guide rail 4 can do vertical direction linear reciprocating motion with guide rail 4, and promote rocking arm 2 and swing, rocking arm 2 drives valve 1 to move up and down.So far, the rotary motion of cam 6 has finally changed into the to-and-fro motion of valve 1.Owing to regulating roller 7 and controlling rod 8 to link together, controlling rod 8 therefore also can be driven to swing around hinge 9.
The control procedure of continuously variable valve lift control gear realizes like this, after stepper motor 14 rotates to an angle, worm screw 12 also can rotate a certain angle, to contact with the worm gear of swing arm 10 due to worm screw 12 and the transmission of force and motion can be carried out, therefore worm gear also can rotate a certain angle around cone 11, and the ratio of worm gear angle of swing and worm screw 12 angle of swing is determined by the concrete structure of worm gear and worm screw 12.After worm gear rotates, swing arm 10 will produce swing, and swing arm 10 also can will swing the linear motion being converted into controlling rod 8 by hinge 9 simultaneously.Because controlling rod 8 is fixed together with regulating roller 7 center, therefore controlling rod 8 can promote to regulate roller 7 in the horizontal guide slot of guide rail 4, do the linear motion of substantially horizontal.Namely change when regulating roller 7 to do linear motion and regulate roller 7 and the distance of hydraulic tappet 15 with rocking arm 2 contact, change Rocker Ratio thus.And the motion of cam 6 can not change because of said process, therefore the lift of valve 1 can change because of the change of Rocker Ratio, so far achieves the change of valve lift, reaches control object.In the allowed band of the step-length of stepper motor 14, the change of continuous print Rocker Ratio can be realized, namely can realize the consecutive variations of valve lift.Because the velocity ratio of worm and worm gear is very large, therefore control accuracy can be improved further.
Different according to the sense of rotation of stepper motor 14, regulating and controlling roller 7 can be realized or move right left, realize thus increasing and reducing Rocker Ratio, realize the increase of valve lift thus and reduce to control.Be illustrated in figure 2 the state of a control realizing lift and increase, be illustrated in figure 3 the state of a control realizing lift and diminish.
Claims (3)
1. a continuously variable valve lift control gear, comprise, guide rail (4) is slidably arranged in the vertical guiding groove of sliding sleeve (3), the guide track roller (5) that cam (6) and guide rail (4) top are installed contacts, valve (1) and hydraulic tappet (15) are arranged on below rocking arm (2) two ends respectively, it is characterized in that, roller (7) is regulated to be slidably arranged in the horizontal guide slot of described guide rail (4) bottom, regulate roller be positioned at described rocking arm (2) top, and with rocking arm (2) compressive contact; The transmission shaft (13) of stepper motor (14) is provided with worm screw (12), the worm sector of swing arm (10) bottom is meshed with worm screw (12); rocking arm upper end is hinged with the left end of the controlling rod (8) being positioned at substantially horizontal through hinge (9); controlling rod (8) right-hand member is fixed on the axle of adjustment roller (7), and the cone (11) be fixed on engine body leans on swing arm (10) right side and forms fulcrum.
2. continuously variable valve lift control gear according to claim 1, is characterized in that, described controlling rod (8) right-hand member is fixed on the center regulating roller (7).
3. continuously variable valve lift control gear according to claim 2, is characterized in that, the right-hand member of described controlling rod (8) also has a section straight up, and the end of this section straight up fixes with regulating the center of roller (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410456586.2A CN104329136B (en) | 2014-09-09 | 2014-09-09 | Continuously-variable valve lift control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410456586.2A CN104329136B (en) | 2014-09-09 | 2014-09-09 | Continuously-variable valve lift control device |
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| Publication Number | Publication Date |
|---|---|
| CN104329136A true CN104329136A (en) | 2015-02-04 |
| CN104329136B CN104329136B (en) | 2017-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410456586.2A Active CN104329136B (en) | 2014-09-09 | 2014-09-09 | Continuously-variable valve lift control device |
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| CN (1) | CN104329136B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104612777A (en) * | 2015-02-06 | 2015-05-13 | 西华大学 | Consecutive variable valve timing device |
| CN106837465A (en) * | 2016-12-30 | 2017-06-13 | 浙江大学 | The engine valve actuating mechanism of stepless variable valve lift |
| CN108194159A (en) * | 2018-02-07 | 2018-06-22 | 吉林大学 | A kind of valve timing-lift adjustment mechanism |
| CN113669128A (en) * | 2021-08-30 | 2021-11-19 | 山东大学 | Internal combustion engine valve control device regulated by motor |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10117584A1 (en) * | 2001-04-07 | 2002-10-10 | Willi Roth | Device for lift adjustment of gas exchange valves has slide piece on trailing lever between valve and cam follower, whereby in no-lift position slide piece lies directly in middle of bearing point of cam follower |
| DE10138741A1 (en) * | 2001-08-07 | 2003-02-20 | Christian Bartsch | Internal combustion engine with valve lift adjustment, has second rocker lever operated by first rocker lever that opens valve in such a way that rocker levers are parallel when valve is closed |
| EP1331370A1 (en) * | 2002-01-28 | 2003-07-30 | Ford Global Technologies, Inc., A subsidiary of Ford Motor Company | Variable valve drive |
| CN201090257Y (en) * | 2007-08-20 | 2008-07-23 | 冯明东 | Double-rocker type valve lift-range non-stage regulating mechanism |
| CN101571060A (en) * | 2008-04-29 | 2009-11-04 | 现代自动车株式会社 | Variable valve lift apparatus |
| CN103850744A (en) * | 2013-12-20 | 2014-06-11 | 华南理工大学 | Variable valve lift mechanism |
| CN204082251U (en) * | 2014-09-09 | 2015-01-07 | 西华大学 | Continuously variable valve lift control gear |
-
2014
- 2014-09-09 CN CN201410456586.2A patent/CN104329136B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10117584A1 (en) * | 2001-04-07 | 2002-10-10 | Willi Roth | Device for lift adjustment of gas exchange valves has slide piece on trailing lever between valve and cam follower, whereby in no-lift position slide piece lies directly in middle of bearing point of cam follower |
| DE10138741A1 (en) * | 2001-08-07 | 2003-02-20 | Christian Bartsch | Internal combustion engine with valve lift adjustment, has second rocker lever operated by first rocker lever that opens valve in such a way that rocker levers are parallel when valve is closed |
| EP1331370A1 (en) * | 2002-01-28 | 2003-07-30 | Ford Global Technologies, Inc., A subsidiary of Ford Motor Company | Variable valve drive |
| CN201090257Y (en) * | 2007-08-20 | 2008-07-23 | 冯明东 | Double-rocker type valve lift-range non-stage regulating mechanism |
| CN101571060A (en) * | 2008-04-29 | 2009-11-04 | 现代自动车株式会社 | Variable valve lift apparatus |
| CN103850744A (en) * | 2013-12-20 | 2014-06-11 | 华南理工大学 | Variable valve lift mechanism |
| CN204082251U (en) * | 2014-09-09 | 2015-01-07 | 西华大学 | Continuously variable valve lift control gear |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104612777A (en) * | 2015-02-06 | 2015-05-13 | 西华大学 | Consecutive variable valve timing device |
| CN104612777B (en) * | 2015-02-06 | 2017-01-25 | 西华大学 | Consecutive variable valve timing device |
| CN106837465A (en) * | 2016-12-30 | 2017-06-13 | 浙江大学 | The engine valve actuating mechanism of stepless variable valve lift |
| CN108194159A (en) * | 2018-02-07 | 2018-06-22 | 吉林大学 | A kind of valve timing-lift adjustment mechanism |
| CN108194159B (en) * | 2018-02-07 | 2023-10-10 | 吉林大学 | Valve timing-lift adjusting mechanism |
| CN113669128A (en) * | 2021-08-30 | 2021-11-19 | 山东大学 | Internal combustion engine valve control device regulated by motor |
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| Publication number | Publication date |
|---|---|
| CN104329136B (en) | 2017-02-15 |
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Effective date of registration: 20200519 Address after: No. 917, floor 9, building 1, No. 666, middle section of Tianfu Avenue, hi tech Zone, Chengdu, Sichuan 610000 Patentee after: Chengdu Feiqing Aviation Technology Co., Ltd Address before: 610039, No. 999, Jin Zhou road, Jinniu District, Sichuan, Chengdu Patentee before: XIHUA University |
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