CN104612777A - Consecutive variable valve timing device - Google Patents
Consecutive variable valve timing device Download PDFInfo
- Publication number
- CN104612777A CN104612777A CN201510063644.XA CN201510063644A CN104612777A CN 104612777 A CN104612777 A CN 104612777A CN 201510063644 A CN201510063644 A CN 201510063644A CN 104612777 A CN104612777 A CN 104612777A
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- China
- Prior art keywords
- roller
- arc surface
- guide rail
- rocker
- rocking arm
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- 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.)
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Classifications
-
- 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
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
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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 consecutive variable valve timing device, and belongs to the field of internal combustion engine valve timing. The consecutive variable valve timing device is characterized in that a valve cam, a roller, a guide rail and a rocker roller are connected with each other in sequence from top to bottom; the guide rail is provided with an upper arc surface and a lower arc surface, and the left end face and the right end face of the guide rail are parallel to each other and are arranged in fixed sliding sleeves which can make the guide rail move up and down in a straight line respectively; the rocker roller is movably arranged in the middle of a rocker, the left end of the rocker is connected with a hydraulic tappet, the right end of the rocker is connected with a valve, and the valve and the hydraulic tappet are arranged on the lower portion of the rocker; the roller is connected with one end of a push rod, the other end of the push rod is connected with one end of the rocker through a hinge, the other end of the rocker is provided with a worm wheel, the worm wheel is provided with a worm which is matched with the worm wheel, the worm is connected to a stepping motor through a transmission shaft, and the middle of the rocker is provided with a rocker pivot point. According to the consecutive variable valve timing device, the consecutive variable regulation of timing can be conducted through using mechanical structure, the regulation precision is high, and the transmission efficiency is high.
Description
Technical field
The present invention relates to field valve timing, be specifically related to a kind of continuous variable valve timing apparatus.
Background technique
The best of internal combustion engine intake valve and exhaust valve opens and closes moment, i.e. valve timing, by the impact of factors, and the rotating speed of such as motor and the load of motor etc.Research shows, a rational valve timing has positive role for the performance improving motor.
Existing valve timing apparatus is produce relative displacement based on fluid power by between camshaft and driving gear mostly, changes the time variations of camshaft relative to gear thus, and then changes timing.In order to keep the constant of timing, needing to provide lasting fluid power, result in the waste of the energy.The characteristic of liquid also determines the accurate control being difficult to realize timing simultaneously.Therefore, get final product self-locking after exploitation one can realize adjustment, the valve timing apparatus that can accurately control simultaneously based on machinery seems particularly important.
Summary of the invention
Technical problem to be solved by this invention be to provide a kind of can the valve timing apparatus of continuous variable, this device more accurately can regulate and control valve timing.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is:
A kind of continuous variable valve timing apparatus, has valve cam, roller, guide rail to be connected successively with rocking arm roller from top to bottom; Described guide rail has upper arc surface and lower arc surface, on it, arc surface is coaxial with valve cam, the radius of lower arc surface is identical with the radius of upper arc surface, the left and right both ends of the surface of guide rail are parallel to each other, and with the upper arc surface radius by upper arc surface center for symmetry axis symmetry, the left and right both ends of the surface of described guide rail are placed in respectively and can make in the fixing sliding sleeve of its upper and lower straight line motion; Described rocking arm roller is movably arranged in the middle part of rocking arm, and described rocking arm left end is connected with hydraulic tappet, and described hydraulic tappet maintains static, and rocking arm right-hand member is connected with valve, and described valve and hydraulic tappet coexist below rocking arm; Described roller connects push rod one end, the described push rod the other end is connected through the hinge swing arm one end, and the described swing arm the other end is provided with worm gear, described worm gear is provided with the worm screw matched with it, described worm screw links stepper motor by transmission shaft, is provided with swing arm fulcrum in the middle part of described swing arm.
Concrete, the model of described stepper motor is 42BYG-5.18.
Concrete, the velocity ratio of described worm and gear is 16.
The invention has the beneficial effects as follows: 1, the present invention uses mechanical structure to carry out the adjustment of timing, and degree of regulation is high, and transmission efficiency is high; 2, worm-and-wheel gear has auto-lock function, and timing does not need other measures to maintain timing after regulating and realizing, and adjustment remains unchanged, and reduces energy consumption; 3, regulating the lift that can not change valve while timing, with other lift adjustment mechanism with the use of time can not produce and influence each other.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention will be further described in detail, wherein:
Fig. 1 is the original state schematic diagram of this continuous variable valve timing apparatus.
Fig. 2 is the advanced condition schematic diagram of this continuous variable valve timing apparatus.
Fig. 3 is the postponement view of this continuous variable valve timing apparatus.
In figure: 1-hydraulic tappet; 2-rocking arm; 3-fixes sliding sleeve; 4-guide rail; 5-roller; 6-valve cam; 7-stepper motor; 8-transmission shaft; 9-worm screw; 10-worm gear; 11-swing arm fulcrum; 12-swing arm; 13-push rod; 14-hinge; 15-rocking arm roller; 16-valve.
Embodiment
The object of the present invention is to provide a kind of can realize continuous variable valve timing regulate device, its concrete structure as shown in Figure 1: have valve cam 6, roller 5, guide rail 4 to be connected successively with rocking arm roller 15 from top to bottom; Guide rail 4 has upper arc surface and lower arc surface, on it, arc surface is coaxial with valve cam 6, the radius of lower arc surface is identical with the radius of upper arc surface, the left and right both ends of the surface of guide rail 4 are parallel to each other, and with the upper arc surface radius by upper arc surface center for symmetry axis symmetry, the angle of upper arc surface determines maximum shifting to an earlier date and postpones timing crank angle with maximum, the Base radius that the radius of the upper arc surface of guide rail 4 equals valve cam 6 adds the diameter of roller 5, and the left and right both ends of the surface of guide rail 4 are placed in respectively and can make in the fixing sliding sleeve 3 of its upper and lower straight line motion; Rocking arm roller 15 directly contacts with the lower arc surface of guide rail 4, and rocking arm roller 15 is movably arranged in the middle part of rocking arm 2, rocking arm 2 left end is connected with hydraulic tappet 1, and hydraulic tappet 1 maintains static; rocking arm 2 right-hand member is connected with valve 16, and valve 16 and hydraulic tappet 1 coexist below rocking arm 2; Roller 5 connects push rod 13 one end, push rod 13 the other end connects swing arm 12 one end by hinge 14, and swing arm 12 the other end is provided with worm gear 10, worm gear 10 is provided with the worm screw 9 matched with it, worm screw 9 links stepper motor 7 by transmission shaft 8, is provided with swing arm fulcrum 11 in the middle part of swing arm 12.
Stepper motor 7 is can the stepper motor of forward and backward, and such as model is the stepper motor of 42BYG-5.18, and its maximum static moment is 3NM.Can select the worm gear of 16 teeth in worm-and-wheel gear, the worm screw of single head, its velocity ratio is 16.
The working procedure of this continuous variable advance/retard mechanism is: valve cam 6 rotates according to the set characteristics of motion, and be set as in the present invention rotating clockwise, when stepper motor 7 is without any action, roller 5 is positioned at the center of the upper arc surface of guide rail 4.Because hydraulic tappet 1 is arranged on engine body; rocking arm 2 one end is placed on hydraulic tappet 1; the other end is provided with valve 16; centre of rocking arm 2 is provided with rocking arm roller 15, now, the force direction of hydraulic tappet 1 pair of rocking arm 2 is upwards; valve 16 also be upwards to the force direction of rocking arm 2; guide rail 4 applies a downward power by rocking arm roller 15 to rocking arm 2, and three power are in balance in an initial condition, and valve 16 can not produce any motion.When valve cam 6 starts there is lift, valve cam 6 promotes roller 5 and moves, and because roller 5 directly contacts with guide rail 4, therefore roller 5 can directly move by promotion guide rail 4.Guide rail 4 can only do upper and lower straight line motion in fixing sliding sleeve 3, and the lower arc surface of guide rail 4 can directly move by promotion rocking arm roller 15.Rocking arm roller 15 is arranged on rocking arm 2, and therefore rocking arm 2 can rotate around hydraulic tappet 1 and the valve 16 promoting the other end does straight line motion, realizes the unlatching of valve 16 thus.After valve cam 6 reaches maximum lift, under the reaction force of valve 16, rocking arm 2 can rotate backward, and drives rocking arm roller 15 to promote guide rail 4 reversing motion thus, and then promotion roller 5 moves, and makes roller 5 keep contacting with valve cam 6.
After stepper motor 7 turns an angle, driving worm gear 10 rotates by worm screw 9, that is to say that swing arm 12 rotates certain angle around swing arm fulcrum 11, and swing arm 12 can promote push rod 13 by hinge 14 and move while rotation, therefore also just makes roller 5 create motion.Because guide rail 4 is coaxial with valve cam 6, and radius equals valve cam Base radius and roller diameter sum, therefore the motion of roller 5 is actually and circles around the axle center of valve cam 6, and roller 5 also remains and to contact with arc surface on valve cam 6 and guide rail 4 in the process of motion.In addition, because guide rail 4 can only do reciprocating linear motion in fixing sliding sleeve 3, after therefore roller 5 moves change, be consistent before the characteristics of motion of valve 16 and roller 5 move.
When the moving direction of roller 5 is consistent with the sense of rotation of valve cam 6, finally show as the postponement of valve timing, as shown in Figure 3; When the moving direction of roller 5 is contrary with the sense of rotation of valve cam 6, finally show as shifting to an earlier date of valve timing, as shown in Figure 2.
Generally speaking, when stepper motor 7 is clockwise or when rotating counterclockwise, Direct driver worm gear 10 carries out clockwise or counter-clockwise swing by worm screw 9.When swing arm 12 rotates counterclockwise, will drag roller 5 by push rod 13 and move right, the direction of rotation of moving direction and valve cam 6, valve timing will shift to an earlier date, as shown in Figure 2.When swing arm 12 rotates clockwise, will drag roller 5 to left movement by push rod 13, moving direction is identical with the sense of rotation of valve cam 6, and valve timing will postpone, as shown in Figure 3.Because worm-and-wheel gear has auto-lock function, if when therefore not operating stepper motor 7, whole control mechanism will be remained stationary state, and timing state can not change, and have nothing to do with the current advanced condition state of still postponing that is in.
Claims (3)
1. a continuous variable valve timing apparatus, is characterized in that: have valve cam (6), roller (5), guide rail (4) to be connected successively with rocking arm roller (15) from top to bottom; Described guide rail (4) has upper arc surface and lower arc surface, on it, arc surface is coaxial with valve cam (6), the radius of lower arc surface is identical with the radius of upper arc surface, the left and right both ends of the surface of guide rail (4) are parallel to each other, and with the upper arc surface radius by upper arc surface center for symmetry axis symmetry, the left and right both ends of the surface of described guide rail (4) are placed in respectively and can make in the fixing sliding sleeve (3) of its upper and lower straight line motion; Described rocking arm roller (15) is movably arranged on rocking arm (2) middle part, described rocking arm (2) left end is connected with hydraulic tappet (1), and described hydraulic tappet (1) maintains static; rocking arm (2) right-hand member is connected with valve (16), described valve (16) and hydraulic tappet (1) coexist below rocking arm (2); Described roller (5) connects push rod (13) one end, described push rod (13) the other end connects swing arm (12) one end by hinge (14), described swing arm (12) the other end is provided with worm gear (10), described worm gear (10) is provided with the worm screw (9) matched with it, described worm screw (9) links stepper motor (7) by transmission shaft (8), and described swing arm (12) middle part is provided with swing arm fulcrum (11).
2. a kind of continuous variable valve timing apparatus as claimed in claim 1, is characterized in that: the model of described stepper motor (7) is 42BYG-5.18.
3. a kind of continuous variable valve timing apparatus as claimed in claim 1 or 2, is characterized in that: the velocity ratio of described worm gear (10) worm screw (9) is 16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510063644.XA CN104612777B (en) | 2015-02-06 | 2015-02-06 | Consecutive variable valve timing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510063644.XA CN104612777B (en) | 2015-02-06 | 2015-02-06 | Consecutive variable valve timing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104612777A true CN104612777A (en) | 2015-05-13 |
| CN104612777B CN104612777B (en) | 2017-01-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510063644.XA Expired - Fee Related CN104612777B (en) | 2015-02-06 | 2015-02-06 | Consecutive variable valve timing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104612777B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108194159A (en) * | 2018-02-07 | 2018-06-22 | 吉林大学 | A kind of valve timing-lift adjustment mechanism |
| CN108798822A (en) * | 2018-06-25 | 2018-11-13 | 常州机电职业技术学院 | Continuous variable valve lift device of piston type internal combustion engine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6311659B1 (en) * | 1999-06-01 | 2001-11-06 | Delphi Technologies, Inc. | Desmodromic cam driven variable valve timing mechanism |
| JP4084542B2 (en) * | 2001-03-07 | 2008-04-30 | 株式会社オティックス | Variable valve mechanism |
| CN201874632U (en) * | 2010-04-29 | 2011-06-22 | 朱譞晟 | Fully variable valve timing gear containing variable-speed swing mechanism |
| CN103437850A (en) * | 2013-08-14 | 2013-12-11 | 重庆长安汽车股份有限公司 | Continuously variable valve lift mechanism |
| CN104329136A (en) * | 2014-09-09 | 2015-02-04 | 西华大学 | Continuously-variable valve lift control device |
| CN204476491U (en) * | 2015-02-06 | 2015-07-15 | 西华大学 | A kind of continuous variable valve timing apparatus |
-
2015
- 2015-02-06 CN CN201510063644.XA patent/CN104612777B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6311659B1 (en) * | 1999-06-01 | 2001-11-06 | Delphi Technologies, Inc. | Desmodromic cam driven variable valve timing mechanism |
| JP4084542B2 (en) * | 2001-03-07 | 2008-04-30 | 株式会社オティックス | Variable valve mechanism |
| CN201874632U (en) * | 2010-04-29 | 2011-06-22 | 朱譞晟 | Fully variable valve timing gear containing variable-speed swing mechanism |
| CN103437850A (en) * | 2013-08-14 | 2013-12-11 | 重庆长安汽车股份有限公司 | Continuously variable valve lift mechanism |
| CN104329136A (en) * | 2014-09-09 | 2015-02-04 | 西华大学 | Continuously-variable valve lift control device |
| CN204476491U (en) * | 2015-02-06 | 2015-07-15 | 西华大学 | A kind of continuous variable valve timing apparatus |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108798822A (en) * | 2018-06-25 | 2018-11-13 | 常州机电职业技术学院 | Continuous variable valve lift device of piston type internal combustion engine |
| CN108798822B (en) * | 2018-06-25 | 2023-04-18 | 常州机电职业技术学院 | Continuous variable valve lift device of piston type internal combustion engine |
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| Publication number | Publication date |
|---|---|
| CN104612777B (en) | 2017-01-25 |
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Granted publication date: 20170125 Termination date: 20190206 |
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| CF01 | Termination of patent right due to non-payment of annual fee |