CN102140944B - Eccentric shaft control system of complete-variable air valve lift mechanism - Google Patents
Eccentric shaft control system of complete-variable air valve lift mechanism Download PDFInfo
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- CN102140944B CN102140944B CN 201110062792 CN201110062792A CN102140944B CN 102140944 B CN102140944 B CN 102140944B CN 201110062792 CN201110062792 CN 201110062792 CN 201110062792 A CN201110062792 A CN 201110062792A CN 102140944 B CN102140944 B CN 102140944B
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- Prior art keywords
- eccentric shaft
- valve lift
- air valve
- control system
- variable air
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- 230000007246 mechanism Effects 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000000694 effects Effects 0.000 claims abstract description 4
- 230000002265 prevention Effects 0.000 abstract 1
- 230000033001 locomotion Effects 0.000 description 6
- 230000000116 mitigating effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
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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
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0021—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of rocker arm ratio
- F01L13/0026—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of rocker arm ratio by means of an eccentric
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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
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L13/0063—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
- F01L2013/0068—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot with an oscillating cam acting on the valve of the "BMW-Valvetronic" type
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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 relates to an eccentric shaft control system of a complete-variable air valve lift mechanism. An engine cylinder cover (7) is provided with a bearing seat (5); the bearing seat (5) is provided with an eccentric shaft (4); the eccentric shaft (4) is provided with an eccentric wheel (43); a worm (12) is installed on a rotor of a motor (1); a worm wheel (14) is fixedly connected to an eccentric shaft neck (44); and during the meshing process of the worm (12) and the worm wheel (14) driven by the motor (1), through the effect of an angle limiting device, the adjustment of an adjustment air valve from zero to the maximum value can be realized through the rotation changes of the eccentric shaft (4) from zero to 180 degrees. According to the invention, because the rotation changes of the eccentric shaft from zero to 180 degrees are controlled by the angle limiting device, the adjustment of the adjustment air valve from zero to the maximum value can be realized, and the accurate regulation and control, and prevention of system failure are ensured, so that the reliability of the engine is strengthened.
Description
Technical field
The present invention relates to the eccentric shaft control system of full variable air valve lift range mechanism in a kind of car combustion engine.
Background technique
The development of variable valve actuating mechanism is had higher requirement to the control of system, and on the one hand, the variable gas distribution system needs to satisfy the variable demand in valve lift, duration, correct time; On the other hand, must guarantee that regulation and control are accurate, avoid the system failure, thereby strengthen the reliability of engine operation; In addition, must try one's best mitigation system weight, complexity.
Eccentric shaft control mechanism structure more complicated and the reliability of one Chinese patent application " a kind of valve lift control mechanism of realizing step-less adjustment " in (CN200910116666.2) is not high.
Summary of the invention
The present invention has designed a kind of eccentric shaft control system of full variable air valve lift range mechanism, the technical problem of its solution is existing eccentric shaft control mechanism structure more complicated, reliability is not high and can not can not realize regulate in the rotating range that makes eccentric shaft in minimum valve lift from zero to the adjusting the maximum value.
In order to solve the technical problem of above-mentioned existence, the present invention has adopted following scheme:
A kind of eccentric shaft control system of full variable air valve lift range mechanism is equipped with bearing support (5) on the engine cylinder cover (7), eccentric shaft (4) is housed on the said bearing support (5), and said eccentric shaft (4) is provided with eccentric wheel (43); Worm screw (12) is installed on the rotor of motor (1); Worm gear (14) is fixedly connected on the said eccentric shaft axle journal (44); Said motor (1) drives said worm screw (12) and said worm gear (14) and is meshing with each other in the process; Under an angular stop means effect, said eccentric shaft (4) only need 0 degree to 180 degree rotation change just can realize the adjusting valve lift from zero to the adjusting the maximum value.
Further; Said angular stop means comprises upper limit hole (41), lower limit hole (42) and position limit pin (32); Said upper limit hole (41) and said lower limit hole (42) are arranged on the said eccentric shaft (4), and the residing plane in said upper limit hole (41) and said lower limit hole (42) is divided into two equal portions with said eccentric shaft (4).
Further, the zone that gear is set continuously on said worm gear (14) is the half the of said worm gear (14) girth.
Further, also comprise a bearing cap assembly (3), said bearing cap assembly (3) is used for said eccentric shaft (4) is limited in bearing support (5).
Further, an end of said position limit pin (32) is fixed on the said bearing cap assembly (3) through pin-and-hole (31).
Further, a termination portion and the needle bearing (13) of said worm screw (12) cooperatively interact, and the other end of said needle bearing (13) is installed on the said bearing cap assembly (3).
Further, be provided with one between said worm gear (14) and the said eccentric shaft (4) and prevent the locating stud (45) of rotation each other, said locating stud (45) is fixed on the said eccentric shaft (4).
Further, the mutual interlock of two thrust surfaces (46) on the said eccentric shaft (4) and bearing support thrust surface (51) guarantees the axially locating of said eccentric shaft (4) on said bearing support (5).
Further, be provided with a motor erection support (2) between said motor (1) and the said bearing cap assembly (3), motor flange (11) is installed in the said motor erection support (2).
Further, also be provided with lightening hole (33) and resigning hole (34) on the said bearing cap assembly (3).
The eccentric shaft control system of this full variable air valve lift range mechanism is compared with traditional eccentric shaft, has following beneficial effect:
(1) the present invention is owing to spend to 180 degree rotation change 0 through angular stop means control eccentric shaft; Just can realize regulating valve lift from zero to the adjusting the maximum value, thus guarantee regulation and control accurately, the reliability avoiding the system failure and strengthen engine operation.
(2) the present invention not only satisfies design requirement because worm gear is adopted the design of half gear, simultaneously can economical with materials, alleviate movement inertia.
(3) the present invention is owing to belong to rolling friction between worm screw and the needle bearing, is used to reduce the frictional force of the rotation of rotor, simultaneously both the spacing long motion and stable operations that can guarantee rotor and worm screw radially.
(4) the present invention is because two thrust surfaces on the eccentric shaft and the mutual interlock of bearing support thrust surface can guarantee the axially locating of eccentric shaft on bearing support.
(5) the present invention is owing to also be provided with lightening hole and resigning hole, the weight and the complexity of the mitigation system of can trying one's best on the bearing cap assembly.
Description of drawings
Fig. 1 is the structural representation of the eccentric shaft control system of the full variable air valve lift range mechanism of the present invention;
Fig. 2 is the worm and gear structural configuration sectional view among the present invention;
Fig. 3 be among Fig. 2 A-A to generalized section;
Fig. 4 is a worm and gear structural configuration schematic representation among the present invention;
Fig. 5 is a worm and gear linkage structure enlarged diagram among the present invention;
Fig. 6 is eccentric shaft and a bearing support scheme of installation among the present invention;
Fig. 7 is the scheme of installation of middle (center) bearing cap assembly of the present invention and motor erection support;
Fig. 8 is the structural representation of middle (center) bearing cap assembly of the present invention.
Description of reference numerals:
1-motor; 2-motor erection support; 3-bearing cap assembly; 4-eccentric shaft; 5-bearing support; 6-bolt; 7-engine cylinder cover; 11-motor flange; 12-worm screw; 13-needle bearing; 14-worm gear; 15-mounting hole; 21-bolt; 31-pin-and-hole; 32-position limit pin; 33-lightening hole; 34-resigning hole; 35-mounting flange; 41-upper limit hole; 42-lower limit hole; 43-eccentric wheel; 44-eccentric wheel axle journal; 45-locating stud; 46-thrust surface; 51-bearing support thrust surface.
Embodiment
Below in conjunction with Fig. 1 to Fig. 8, the present invention is further specified:
Like Fig. 1 and shown in Figure 6; A kind of eccentric shaft control system of full variable air valve lift range mechanism is equipped with bearing support 5 on the engine cylinder cover 7, eccentric shaft 4 is housed on the bearing support 5; Eccentric shaft 4 is provided with eccentric wheel 43; Also comprise a bearing cap assembly 3, bearing cap assembly 3 is used for eccentric shaft 4 is limited in bearing support 5, and bolt 6 is used for fastening; Worm screw 12 is installed on the rotor of motor 1; Worm gear 14 is fixedly connected on the eccentric shaft axle journal 44; Motor 1 driving worm screw 12 is meshing with each other with worm gear 14 in the process; Under an angular stop means effect, 4 need of eccentric shaft 0 degree to 180 degree rotation change just can realize the adjusting valve lift from zero to the adjusting the maximum value.
Specifically: angular stop means comprises upper limit hole 41, lower limit hole 42 and position limit pin 32; Upper limit hole 41 is arranged on the eccentric shaft 4 with lower limit hole 42; And upper limit hole 41 is divided into two equal portions with 42 residing planes, lower limit hole with eccentric shaft 4, and an end of position limit pin 32 can be fixed on the bearing cap assembly 3 through pin-and-hole 31.
The working principle of this angular stop means is following: motor 1 drives worm screw 12 rotations; The mode of worm screw 12 through gear engagement drives worm gear 14 and rotates jointly with eccentric shaft 4; Owing to be provided with upper limit hole 41 and lower limit hole 42 on the eccentric shaft 4, and position limit pin 32 is positioned on the track that upper limit hole 41 and lower limit hole 42 rotatablely move.When upper limit hole 41 rotates to position limit pin 32 places; Position limit pin 32 will stop that upper limit hole 41 and eccentric shaft 4 continue to move upward; Eccentric shaft 4 is with reversing motion, and when spacing hole 42 rotates to position limit pin 32 places instantly, position limit pin 32 will stop that lower limit hole 42 and eccentric shaft 4 continue to move downward.Because it is two equal portions that upper limit hole 41 is divided the girth of eccentric shaft 4 equally with lower limit hole 42; Thereby eccentric shaft 4 is with meeting back and forth movement in 0 degree to 180 degree intervals; Thereby produced mechanical position of rest, thereby the rotation that guarantees motor is between upper limit hole 41 and lower limit hole 42.Under the contingency mode,, can design and launch the maximum valve lift pattern under this state, regulate the load of motor through traditional closure through the setting of associated motor parameter.In addition, can also realize regulating valve lift from zero to the adjusting the maximum value, thus guarantee regulation and control accurately, the reliability avoiding the system failure and strengthen engine operation.
As shown in Figures 2 and 3, the zone that gear is set continuously on worm gear 14 is the half the of worm gear 14 girths.Thereby not only satisfy design requirement, and simultaneously can economical with materials, alleviate movement inertia.
Like Fig. 4 and shown in Figure 5, a termination portion and the needle bearing 13 of worm screw 12 cooperatively interact, and the other end of needle bearing 13 is installed on the bearing cap assembly 3.Owing to belong to rolling friction between worm screw and the needle bearing, be used to reduce the frictional force of the rotation of rotor, simultaneously both the spacing long motion and stable operations that can guarantee rotor and worm screw radially.
As shown in Figure 6, be provided with one between worm gear 14 and the eccentric shaft 4 and prevent the locating stud 45 of rotation each other, locating stud 45 is fixed on the eccentric shaft 4.
Two thrust surfaces 46 on the eccentric shaft 4 can guarantee the axially locating of eccentric shaft on bearing support with the 51 mutual interlocks of bearing support thrust surface.
Like Fig. 7 and shown in Figure 8, be provided with a motor erection support 2 between motor 1 and the bearing cap assembly 3, motor flange 11 is installed in the motor erection support 2.
Also be provided with lightening hole 33 and resigning hole 34 on the bearing cap assembly 3, the weight and the complexity of the mitigation system of can trying one's best.
Combine accompanying drawing that the present invention has been carried out exemplary description above; Obvious realization of the present invention does not receive the restriction of aforesaid way; As long as the various improvement of having adopted method design of the present invention and technological scheme to carry out; Or design of the present invention and technological scheme are directly applied to other occasion without improving, all in protection scope of the present invention.
Claims (9)
1. the eccentric shaft control system of a full variable air valve lift range mechanism is equipped with bearing support (5) on the engine cylinder cover (7), and eccentric shaft (4) is housed on the said bearing support (5), and said eccentric shaft (4) is provided with eccentric wheel (43); Worm screw (12) is installed on the rotor of motor (1); Worm gear (14) is fixedly connected on the said eccentric shaft axle journal (44); It is characterized in that: said motor (1) drives said worm screw (12) and said worm gear (14) and is meshing with each other in the process; Under an angular stop means effect, said eccentric shaft (4) only need 0 degree to 180 degree rotation change just can realize the adjusting valve lift from zero to the adjusting the maximum value; Said angular stop means comprises upper limit hole (41), lower limit hole (42) and position limit pin (32); Said upper limit hole (41) and said lower limit hole (42) are arranged on the said eccentric shaft (4), and the residing plane in said upper limit hole (41) and said lower limit hole (42) is divided into two equal portions with said eccentric shaft (4).
2. according to the eccentric shaft control system of the said full variable air valve lift range mechanism of claim 1, it is characterized in that: the zone that gear is set on said worm gear (14) continuously is the half the of said worm gear (14) girth.
3. according to the eccentric shaft control system of claim 1 or 2 said full variable air valve lift range mechanisms, it is characterized in that: also comprise a bearing cap assembly (3), said bearing cap assembly (3) is used for said eccentric shaft (4) is limited in bearing support (5).
4. according to the eccentric shaft control system of the said full variable air valve lift range mechanism of claim 3, it is characterized in that: an end of said position limit pin (32) is fixed on the said bearing cap assembly (3) through pin-and-hole (31).
5. according to the eccentric shaft control system of the said full variable air valve lift range mechanism of claim 4; It is characterized in that: a termination portion and the needle bearing (13) of said worm screw (12) cooperatively interact, and the other end of said needle bearing (13) is installed on the said bearing cap assembly (3).
6. according to the eccentric shaft control system of the said full variable air valve lift range mechanism of claim 5; It is characterized in that: be provided with one between said worm gear (14) and the said eccentric shaft (4) and prevent the locating stud (45) of rotation each other, said locating stud (45) is fixed on the said eccentric shaft (4).
7. according to the eccentric shaft control system of any one said full variable air valve lift range mechanism in the claim 1,2,4,5 or 6, it is characterized in that: two thrust surfaces (46) on the said eccentric shaft (4) and bearing support thrust surface (51) interlock each other guarantee the axially locating of said eccentric shaft (4) on said bearing support (5).
8. according to the eccentric shaft control system of the said full variable air valve lift range mechanism of claim 7; It is characterized in that: be provided with a motor erection support (2) between said motor (1) and the said bearing cap assembly (3), motor flange (11) is installed in the said motor erection support (2).
9. the eccentric shaft control system of said full variable air valve lift range mechanism according to Claim 8 is characterized in that: also be provided with lightening hole (33) and resigning hole (34) on the said bearing cap assembly (3).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110062792 CN102140944B (en) | 2011-03-16 | 2011-03-16 | Eccentric shaft control system of complete-variable air valve lift mechanism |
| PCT/CN2011/084611 WO2012122845A1 (en) | 2011-03-16 | 2011-12-26 | Eccentric shaft control system for fully variable valve lift mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110062792 CN102140944B (en) | 2011-03-16 | 2011-03-16 | Eccentric shaft control system of complete-variable air valve lift mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102140944A CN102140944A (en) | 2011-08-03 |
| CN102140944B true CN102140944B (en) | 2012-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110062792 Active CN102140944B (en) | 2011-03-16 | 2011-03-16 | Eccentric shaft control system of complete-variable air valve lift mechanism |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102140944B (en) |
| WO (1) | WO2012122845A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102140944B (en) * | 2011-03-16 | 2012-09-05 | 奇瑞汽车股份有限公司 | Eccentric shaft control system of complete-variable air valve lift mechanism |
| CN102808673B (en) * | 2012-07-28 | 2014-11-26 | 奇瑞汽车股份有限公司 | Motor and worm integral installing mechanism of engine and assembling method thereof |
| CN104712395B (en) * | 2015-03-18 | 2017-11-14 | 奇瑞汽车股份有限公司 | The drive device of automobile engine lift range variable |
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| KR20020015825A (en) * | 2000-08-23 | 2002-03-02 | 이계안 | An automotive variable valve timing device using planetary gear system |
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| CN101122246A (en) * | 2006-08-11 | 2008-02-13 | 本田技研工业株式会社 | Internal combustion engine having variable valve operating device |
| CN101408118A (en) * | 2008-11-05 | 2009-04-15 | 刘若丹 | Full function variable gas distribution controlling mechanism of internal combustion engine |
| CN101446218A (en) * | 2008-12-31 | 2009-06-03 | 奇瑞汽车股份有限公司 | Novel air distribution system with variable lift |
| CN101539042A (en) * | 2009-04-29 | 2009-09-23 | 奇瑞汽车股份有限公司 | Valve lift control mechanism capable of realizing stepless regulation |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3977538B2 (en) * | 1999-02-15 | 2007-09-19 | 株式会社日立製作所 | Variable valve operating device for internal combustion engine |
| LU90896B1 (en) * | 2002-02-13 | 2003-08-14 | Delphi Tech Inc | Rotary actuator in particular for a variable valve timing and/or variable lift valve actuating mechanism |
| JP4382531B2 (en) * | 2004-03-04 | 2009-12-16 | トヨタ自動車株式会社 | Variable valve system |
| JP4900173B2 (en) * | 2007-10-01 | 2012-03-21 | 株式会社デンソー | Actuator of valve lift control device |
| JP2009209713A (en) * | 2008-03-03 | 2009-09-17 | Honda Motor Co Ltd | Actuator for variable valve mechanism |
| CN102140944B (en) * | 2011-03-16 | 2012-09-05 | 奇瑞汽车股份有限公司 | Eccentric shaft control system of complete-variable air valve lift mechanism |
-
2011
- 2011-03-16 CN CN 201110062792 patent/CN102140944B/en active Active
- 2011-12-26 WO PCT/CN2011/084611 patent/WO2012122845A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020015825A (en) * | 2000-08-23 | 2002-03-02 | 이계안 | An automotive variable valve timing device using planetary gear system |
| CN1916374A (en) * | 2005-08-15 | 2007-02-21 | 本田技研工业株式会社 | Lift-variable valve-operating system for internal combustionengine |
| CN101122246A (en) * | 2006-08-11 | 2008-02-13 | 本田技研工业株式会社 | Internal combustion engine having variable valve operating device |
| CN101408118A (en) * | 2008-11-05 | 2009-04-15 | 刘若丹 | Full function variable gas distribution controlling mechanism of internal combustion engine |
| CN101446218A (en) * | 2008-12-31 | 2009-06-03 | 奇瑞汽车股份有限公司 | Novel air distribution system with variable lift |
| CN101539042A (en) * | 2009-04-29 | 2009-09-23 | 奇瑞汽车股份有限公司 | Valve lift control mechanism capable of realizing stepless regulation |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012122845A1 (en) | 2012-09-20 |
| CN102140944A (en) | 2011-08-03 |
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