CN102943699B - Cam rocker arm mechanism for internal combustion engine - Google Patents
Cam rocker arm mechanism for internal combustion engine Download PDFInfo
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- CN102943699B CN102943699B CN201210429013.1A CN201210429013A CN102943699B CN 102943699 B CN102943699 B CN 102943699B CN 201210429013 A CN201210429013 A CN 201210429013A CN 102943699 B CN102943699 B CN 102943699B
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- rocker
- shaft
- gear
- tappet
- rocker arm
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Abstract
A cam rocker arm mechanism for an internal combustion engine comprises a main rocker rotatably connected with a rocker shaft, wherein one end of the main rocker is in close contact with a cam shaft; the main rocker swings, taking the rocker shaft as the shaft, with the rotation of the cam shaft; a press ring which is in mutual sliding connection with a tappet mechanism of a top end of a valve rod is arranged at the other end of the main rocker; a shaft is fixedly arranged on the main rocker; a semi-circular auxiliary rocker is rotatably arranged on the shaft, and a plurality of teeth are arranged at the periphery of the semi-circular auxiliary rocker; a projection part is arranged on the auxiliary rocker and is in close contact or clearance contact with the tappet mechanism at the top end of the valve rod of the internal combustion engine; a control gear is fixedly arranged on the rocker shaft and rotates with the rotation of the rocker shaft; and a gear is arranged between the control gear and the auxiliary rocker, the control gear is meshed with the gear, and the gear is meshed with the auxiliary rocker. According to the invention, the low-speed torque output by the engine is large, the power is high, the fuel consumption is low, and economical efficiency and dynamic property of normal working condition of the vehicle engine are better.
Description
Technical field
The present invention relates to a kind of cam rocker arm mechanism.The cam rocker arm mechanism for internal-combustion engine that particularly relates to a kind of variable cam lift.
Background technique
Mechanical system comprises that internal-combustion engine usually needs, by changing the lift of camshaft, to reach the object that improves performance.Such as traditional combustion engine is due to structural limitations, the lift of camshaft is unadjustable, has therefore limited the raising of its performance.
As shown in Figure 1, in traditional combustion engine cam distribution transmission structure, only have 1 rocking arm 2, camshaft 1 rotates and directly drives rocking arm 2 to swing, and then transmission valve 4 moving linearlies.When engine operating condition variation need to reduce valve lift and cycle, to the conventional cam driving mechanism shown in Fig. 1, have no idea to change valve lift and the cycle of motor, so affect engine power performance, Economy and discharge at all.
Along with the variable variable cam lift mechanisms of releasing with Toyota Company of Bayerische Motorne Werke Aktiengeellschaft's camshaft lift etc. has appearred in technological progress, but these complicated structure costs are high.Therefore develop a kind of high-performance, variable lift device is imperative cheaply.
Summary of the invention
Technical problem to be solved by this invention is, provide a kind of for mechanical system, comprise internal-combustion engine can to driving mechanism, implement the cam rocker arm mechanism for internal-combustion engine that valve lift regulates like a cork in mechanical system and internal combustion engine operation process.
The technical solution adopted in the present invention is: a kind of cam rocker arm mechanism for internal-combustion engine, comprise: camshaft, the rotatable master rocker being connected on pitman arm shaft, one end of described master rocker is that close contact is connected with described camshaft, and described master rocker be take pitman arm shaft as axle swing with the rotation of camshaft, the other end of described master rocker has been wholely set pressure ring, described engine valve masthead end is provided with the tappet mechanism for compression valve bar, described pressure ring and described tappet mechanism are slidably connected mutually, this one end that is provided with pressure ring of described master rocker is also fixedly installed axle, the rotatable auxiliary rocker arm that is provided with on described axle, described auxiliary rocker arm is semicircular structure, on circumference, be formed with most teeth, described auxiliary rocker arm is formed with bump in this side that is positioned at described tappet mechanism, described bump and tappet mechanism close contact or the gap-contact for the compression valve bar that are arranged on engine valve masthead end, on described pitman arm shaft, be also fixedly installed control gear, described control gear rotates with the rotation of pitman arm shaft, between described control gear and described auxiliary rocker arm, be also provided with gear, wherein, described control gear is meshed with described gear, described gear is meshed with described auxiliary rocker arm.
Described tappet mechanism includes the tappet being slidably connected with pressure ring, and the bracket that is positioned at tappet bottom and is connected with the top of described valve stem is positioned on bracket and is enclosed within the spring in tappet outside.
Cam rocker arm mechanism for internal-combustion engine of the present invention, because valve lift and cycle in work are adjustable, the low speed torque that makes motor output is large, power is high, fuel consumption is few, Economy and the good dynamic property of the conventional operating mode of automobile-used machine.Combine with other variable techniques, can keep good Economy, power character and exhaust index.On basis of the present invention, can apply existing any internal-combustion engine advanced technology.
Accompanying drawing explanation
Fig. 1 is traditional combustion engine cam distribution transmission structure schematic diagram;
Fig. 2 is the structural representation of the cam rocker arm mechanism for internal-combustion engine of the present invention.
In figure
1: camshaft 2: master rocker
3: control gear 4: gear
5: auxiliary rocker arm 6: tappet
7: spring 8: valve stem
9: cylinder body pilot hole 10: valve seat
11: valve spring 12: pitman arm shaft
13: axle 14: bracket
15: pressure ring
Embodiment
Below in conjunction with embodiment and accompanying drawing, the cam rocker arm mechanism for internal-combustion engine of the present invention is described in detail.
Cam rocker arm mechanism for internal-combustion engine of the present invention is the device of exerting pressure for the valve stem of combustion motor, wherein the valve stem structure of internal-combustion engine as shown in Figure 2, include valve seat 10, be connected to the valve stem 8 on valve seat 10, be enclosed within the cylinder body pilot hole 9 in valve stem 8 outsides, be enclosed within valve stem 8 outsides and be positioned at the valve spring 11 of cylinder body pilot hole 9 tops.
As shown in Figure 2, cam rocker arm mechanism for internal-combustion engine of the present invention, comprise: camshaft 1, the rotatable master rocker 2 being connected on pitman arm shaft 12, one end of described master rocker 2 and described camshaft 1 are connected for close contact, and described master rocker 2 be take pitman arm shaft 12 as axle swing with the rotation of camshaft 1, the other end of described master rocker 2 has been wholely set pressure ring 15, described engine valve bar 8 tops are provided with the tappet mechanism for compression valve bar 8, described tappet mechanism includes tappet 6, the bracket 14 that is positioned at tappet 6 bottoms and is connected with the top of described valve stem 8, be positioned on bracket 14 and be enclosed within the spring 7 in tappet 6 outsides.Described pressure ring 15 is slidably connected mutually with described tappet mechanism, this one end that is provided with pressure ring 15 of described master rocker 2 is also fixedly installed axle 13, the rotatable auxiliary rocker arm 5 that is provided with on described axle 13, described auxiliary rocker arm 5 is semicircular structure, on circumference, be formed with most teeth, described auxiliary rocker arm 5 is formed with bump in this side that is positioned at described tappet mechanism, described bump and tappet mechanism close contact or the gap-contact for the compression valve bar 8 that are arranged on engine valve bar 8 tops, on described pitman arm shaft 12, be also fixedly installed control gear 3, described control gear 3 rotates with the rotation of pitman arm shaft 12, between described control gear 3 and described auxiliary rocker arm 5, be also provided with gear 4, wherein, described control gear 3 is meshed with described gear 4, described gear 4 is meshed with described auxiliary rocker arm 5.
Cam rocker arm mechanism for internal-combustion engine of the present invention, when cam 1 rotates, first drive master rocker 2 to swing, thereby the spring 7 that compression tappet 6 arranges above, and the motion of actual valve stem 8 is subject to the control gear 3 being driven by pitman arm shaft 12, the determining positions of the auxiliary rocker arm 5 of controlling by gear 4, when auxiliary rocker arm 5 is very close to each other with tappet 6, valve stem 8 is directly opened, along with the rotation of cam 1 driving master rocker 2, the straight line lift that valve stem 8 is walked is maximum.When motor needs larger valve lift, can rotate pitman arm shaft 12 and drive control gear 3, the position of controlling the relative tappet 6 of auxiliary rocker arm 5 by gear 4 changes, thereby make camshaft 1 occur different big or small gaps in the transmission system of valve stem 8, thereby make, using under same camshaft running, make motor according to operating mode needs, regulate the variation in needed valve lift and cycle.
So, comparison diagram 1 and Fig. 2, obvious, the present invention, on the basis of traditional combustion engine valve cam system, has obviously increased control gear 3, gear 4, auxiliary rocker arm 5, tappet 6 and spring 7, so when motor keeps maximum lift operation, by control gear 3, the determining positions of the auxiliary rocker arm 5 of controlling by gear 4, when auxiliary rocker arm 5 is very close to each other with tappet 6, valve 8 is directly opened, along with the rotation of the master rocker of camshaft actuated, the straight line lift that valve stem is walked is maximum.When engine operating condition variation need to reduce valve lift and cycle, traditional valve cam system is had no idea to change at all to valve lift and the cycle of motor, so affect engine power performance, Economy and discharge.And the cam rocker arm mechanism for internal-combustion engine of the present invention, can drive control gear 3 by pitman arm shaft, by gear 4, control the position of auxiliary rocker arm 5, thereby the gap changing between auxiliary rocker arm 5 and tappet 6 can regulate the size in actual lift and cycle, using under same cam running, make motor regulate the variation in needed valve lift and cycle according to operating mode needs, thus meet motor multinomial performance index optimization control.
Claims (1)
1. the cam rocker arm mechanism for internal-combustion engine, comprise: camshaft (1), the rotatable master rocker (2) being connected on pitman arm shaft (12), one end of described master rocker (2) and described camshaft (1) are connected for close contact, and described master rocker (2) be take pitman arm shaft (12) as axle swing with the rotation of camshaft (1), the other end of described master rocker (2) has been wholely set pressure ring (15), it is characterized in that, described engine valve bar (8) top is provided with the tappet mechanism for compression valve bar (8), described pressure ring (15) is slidably connected mutually with described tappet mechanism, described master rocker (2) is also fixedly installed axle (13) in this one end that is provided with pressure ring (15), the upper rotatable auxiliary rocker arm (5) that is provided with of described axle (13), described auxiliary rocker arm (5) is semicircular structure, on circumference, be formed with most teeth, described auxiliary rocker arm (5) is formed with bump in this side that is positioned at described tappet mechanism, described bump and tappet mechanism close contact or the gap-contact for the compression valve bar (8) that are arranged on engine valve bar (8) top, on described pitman arm shaft (12), be also fixedly installed control gear (3), described control gear (3) rotates with the rotation of pitman arm shaft (12), between described control gear (3) and described auxiliary rocker arm (5), be also provided with gear (4), wherein, described control gear (3) is meshed with described gear (4), described gear (4) is meshed with described auxiliary rocker arm (5), described tappet mechanism includes the tappet (6) being slidably connected with pressure ring (15), the bracket (14) that is positioned at tappet (6) bottom and is connected with the top of described valve stem (8), be positioned at bracket (14) and go up and be enclosed within the spring (7) in tappet (6) outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210429013.1A CN102943699B (en) | 2012-10-31 | 2012-10-31 | Cam rocker arm mechanism for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210429013.1A CN102943699B (en) | 2012-10-31 | 2012-10-31 | Cam rocker arm mechanism for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102943699A CN102943699A (en) | 2013-02-27 |
| CN102943699B true CN102943699B (en) | 2014-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210429013.1A Expired - Fee Related CN102943699B (en) | 2012-10-31 | 2012-10-31 | Cam rocker arm mechanism for internal combustion engine |
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| Country | Link |
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| CN (1) | CN102943699B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966406B (en) * | 2012-11-25 | 2015-06-03 | 天津大学 | Cam mechanism controlled by using double swinging arms |
| CN105003374A (en) * | 2015-08-13 | 2015-10-28 | 刘晓东 | Detecting equipment for electrical control single oil injection pump |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1690368A (en) * | 2004-04-28 | 2005-11-02 | 本田技研工业株式会社 | Valve train for internal combustion engine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10123186A1 (en) * | 2001-05-12 | 2002-11-14 | Bayerische Motoren Werke Ag | Valve gear device for variable lift adjustment is for gas exchange valve of internal combustion engine and has valve vai intermediary of transmission component effectively connected to roller movable around rotary axis |
| US7406932B2 (en) * | 2005-08-15 | 2008-08-05 | Honda Motor Co., Ltd. | Lift-variable valve-operating system for internal combustion engine |
| JP2008075541A (en) * | 2006-09-21 | 2008-04-03 | Honda Motor Co Ltd | Valve gear for internal combustion engine |
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2012
- 2012-10-31 CN CN201210429013.1A patent/CN102943699B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1690368A (en) * | 2004-04-28 | 2005-11-02 | 本田技研工业株式会社 | Valve train for internal combustion engine |
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| CN102943699A (en) | 2013-02-27 |
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Granted publication date: 20141015 Termination date: 20201031 |
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