CN103470324B - Engine Duan Gang mechanism - Google Patents
Engine Duan Gang mechanism Download PDFInfo
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- CN103470324B CN103470324B CN201310453855.5A CN201310453855A CN103470324B CN 103470324 B CN103470324 B CN 103470324B CN 201310453855 A CN201310453855 A CN 201310453855A CN 103470324 B CN103470324 B CN 103470324B
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- rocking arm
- tappet
- engine
- cam
- valve
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Abstract
The present invention relates to a kind of engine Duan Gang mechanism, comprise the cam-actuated rocking arm being driven by camshaft, and the valve that is connected in rocking arm one end, is driven by described rocking arm, also comprise be connected in the rocking arm other end relative with valve, described rocking arm is carried out to pushing tow or traction so that rocking arm and cam contact or the executing agency that separates. This mechanism is by controlling the contact of rocking arm and cam or separating the disconnected cylinder and the recovery that realize engine, and disconnected cylinder and recovery process can smooth transitions, and it is simple in structure, is easy to arrange on engine.
Description
Technical field
The present invention relates to a kind of engine charge auxiliary body, relate in particular to a kind of engine Duan Gang mechanism.
Background technology
In city driving process, engine many places are in the little load of the slow-speed of revolution or low middle load operation operating mode, and gasoline engine utilizes throttle control load, under this load, air throttle partially opens, and pumping loss is very large, and passenger vehicle engine mostly is Multi-Cylinder Diesel Engine, if now can burn by cut-off parts cylinder, adopt disconnected cylinder technology, make all the other deflagrating jars be operated in large load, throttle opening will control to largely, inhale loss thereby can reduce pump, improve Fuel Economy.
As Chinese invention patent application CN103256124A discloses a kind of valve control machanism of cylinder deactivation engine in turn, it comprises tappet, be positioned at the cam of tappet below for driving tappet to move up and down, vertically be installed on the push rod on tappet, be installed on the conduit in cylinder head, the valve rocker that is slidably mounted on the valve in conduit and rotatably installs by rotating shaft, one end of described valve rocker is rotationally connected with the top of push rod, the other end of described valve rocker be positioned at valve directly over and swing to below valve rocker mutually do not contact with valve, valve top is provided with cotter seat, valve spring is plugged on valve and its two ends are fastened in respectively between cotter seat and conduit, also comprise that one contacts with valve or discontiguous valve control apparatus for controlling when valve rocker swings, this valve control apparatus comprises that level is installed on the electromagnet of valve one side, the head end of described electromagnet is provided with support slipper, on described support slipper, be provided with lug boss protruding upward, in the time that boss is between valve rocker and valve, valve is depressed in the valve swing arm of the below swinging. the technical scheme of this invention can be in the time of needs cylinder deactivation, valve control apparatus makes valve swing arm not contact with valve, valve remains closed condition, but this invention adopts Electromagnetic Drive, normally be opened to completely and close from valve, in a circulation, complete, there is no transient process, increased the difficulty in engine load control.
Summary of the invention
For solving the deficiencies in the prior art, the invention provides a kind of engine Duan Gang mechanism, it can realize disconnected cylinder and the recovery of engine, and disconnected cylinder and recovery process can smooth transitions, and this mechanism structure is simple, is easy to arrange on engine.
For achieving the above object, this engine Duan Gang mechanism comprises the cam-actuated rocking arm being driven by camshaft, and the valve that is connected in rocking arm one end, is driven by described rocking arm, also comprise be connected in the rocking arm other end relative with valve, described rocking arm is carried out to pushing tow or traction so that rocking arm and cam contact or the executing agency that separates. Adopt this scheme, contact by actuating mechanism controls rocking arm and cam or separate, thereby control the transmission of camming movement to valve, when rocking arm separates with cam, when camming movement can not be delivered on valve, valve will be in closed condition, realize disconnected cylinder, recovery rocking arm contacts with cam, and when camming movement can be delivered on valve, valve recovers normal operating conditions.
As the restriction to aforesaid way, the tappet that described executing agency comprises can be straight-line, one end is connected with described rocking arm, and be arranged on the support portion of the tappet other end, described support portion is provided with the support curved surface that contacts and be slidably matched with tappet, also comprises and drives support portion motion so that tappet obtains the driving mechanism of the differing heights support of supporting curved surface at its linear movement direction. In the time giving different height supports to tappet under the driving of support portion at driving mechanism, make tappet produce the rectilinear motion along its axis, in the rectilinear motion of tappet, owing to it being carried out between the support curved surface two ends of pushing tow or traction being continuous curve surface, so rectilinear motion that tappet is flatness, and then make rocking arm and cam separate or contact process has transitionality, realize the smooth transition of resolving cylinder and its recovery process.
As the restriction to aforesaid way, the difference in height between peak and minimum point that described support curved surface supports in tappet linear movement direction tappet is not less than the variable quantity of cam lift. thus in the time moving under the driving of support portion at driving mechanism, supporting curved surface slides with respect to tappet, tappet moves supporting under the pushing tow of curved surface or traction between the peak of its linear movement direction and minimum point, because the difference in height between the straight-line peak of tappet and minimum point is not less than the variable quantity of cam lift, so when tappet moves to minimum point from peak, while acquiring a certain degree, the rocking arm connected with tappet just cannot contact with the cam rotating, thereby make cam cannot drive rocking arm to swing, thereby realize the disconnected cylinder of engine, when support portion is under driving mechanism drives when counter motion, tappet moves to peak from minimum point, in the time recovering the contacting of rocking arm and cam, engine recovers normal work.
As the restriction to aforesaid way, in described tappet slip plug-in mounting and cylinder cap. Tappet is arranged in cylinder cap and can utilizes the oil duct in cylinder cap to be lubricated it, and is convenient to the layout of mechanism.
As the restriction to aforesaid way, described driving mechanism comprises the tooth bar being connected with support portion, and that driven by stepper motor and described tooth bar meshed gears.
As improvement of the present invention, on described rocking arm, be rotatably connected to and the cam rocker-arm roller coordinating that rolls. It can reduce the wearing and tearing between cam and rocking arm, increases service life.
In sum, technical scheme of the present invention can realize disconnected cylinder and the recovery of engine, and its disconnected cylinder and recovery process are steady, because tappet is arranged in cylinder cap, and driving mechanism employing pinion and rack, make mechanism structure simple, be easy to arrange on engine.
Brief description of the drawings
Below in conjunction with the drawings and the specific embodiments, the present invention is done further to describe in detail:
Fig. 1 is the structural representation of the embodiment of the present invention;
Fig. 2 is the structural representation of executing agency;
Fig. 3 is tappet and the schematic diagram that coordinates of tooth bar;
In figure: 1, camshaft; 2, cam; 3, rocking arm; 31, roller shaft; 32, rocker-arm roller; 4, cylinder cap; 5, tappet; 6, support portion; 61, convex body; 62, support curved surface; 7, tooth bar; 8, gear; 9, valve; 10, valve spring.
Detailed description of the invention
The present embodiment relates to a kind of engine Duan Gang mechanism, as shown in Figure 1, it comprises the camshaft 1 that is arranged on rocking arm 3 tops, and be arranged on camshaft 1, drive the cam 2 of rocking arm 3, on rocking arm 3, be provided with and cam 2 rocker-arm roller 32 coordinating that rolls, to reduce the wearing and tearing between cam 2 and rocking arm 3, rocker-arm roller 32 is arranged on rocking arm 3 middle parts by roller shaft 31, and be connected in rocking arm 3 one end, the valve 9 being driven by described rocking arm 3, on valve 9, be provided with the valve spring 10 that drives valve 9 returns, also comprise and be connected in the rocking arm relative with valve 93 other ends, described rocking arm 3 is carried out to pushing tow or traction so that the executing agency that rocking arm 3 contacts or separates with cam 2.
The structure of executing agency as shown in Figures 2 and 3, it comprises the connected tappet 5 of the other end of valve 9 relative to rocking arm 3, tappet 5 is inserted in cylinder cap 4, so that tappet 5 can do the rectilinear motion along its axis, and the motion of other directions is restricted, and tappet 5 can utilize the oil duct (not shown) in cylinder cap 4 to be lubricated. be provided with the support portion 6 being connected with tappet 5 at tappet 5 other ends, support portion 6 is a cuboid, be provided with in its one end and be the leg-of-mutton convex body 61 of class, the end face of convex body 61 is provided with and supports curved surface 62, in the present embodiment, support curved surface 62 for being arranged on the recessed curved surface of convex body 61 end faces, the lower end of tappet 5 is placed in to be supported in curved surface 62, and can be free to slide along supporting curved surface 62, supporting the peak place of curved surface 62 and the center line of bottom surface, minimum point place is arranged to the axis of tappet 5 perpendicular, it between peak and minimum point, is level and smooth easement curve, difference in height between support curved surface 62 peaks and minimum point is set to be not less than the lift variation amount of cam 2, the other end relative with having support curved surface 62 one end in support portion 6 is provided with tooth bar 7, tooth bar 7 is by driving with its meshed gears 8, gear 8 is by the control of stepper motor (not shown). this mechanism only need punch below cylinder cap 4, and the one end with support curved surface 62 is arranged to tappet 5 belows, and it is simple in structure, is convenient to arrange on engine.
The operation principle of this mechanism is, when engine work, tappet 5 lower ends are positioned at the peak place that supports curved surface 62, and tappet 5 is supporting under the support of curved surface 62 and the constraint of cylinder cap 4 and can not move, thus rocking arm 3 at the driving lower swing of cam 2 to open and close valve 9. after cylinder deactivation signal sends, stepper motor driven gear 8 rotates, gear 8 drives the tooth bar 7 engaging with it to slide, thereby making to support the relative tappet 5 of curved surface 62 slides, be that tappet 5 is slided to minimum point by peak in support curved surface 62, now pressing down tappet 5 at the driving lower shake-changing arm 3 of cam 2 moves down it, rocking arm 3 also moves down with the tie point of tappet 5, thereby rocker-arm roller 32 is disengaged gradually with cam 2, and finally realize separating completely of rocker-arm roller 32 and cam 2, the now rotation of cam 2 can not drive rocking arm 3, thereby make valve 9 in closed condition, cylinder is resolved in realization. as the another kind of form of said process, also can be designed so that the lower end of tappet 5 embeds in it by supporting curved surface 62, and can be free to slide along supporting curved surface 62, in the time that tooth bar 7 slides, support portion 6 just can drive tappet 5 to move down, thereby also can realize separating gradually of rocking arm roller 32 and cam 2.
In the time that needs recover cylinder and normally work, stepper motor driven gear 8 reverses, and makes tooth bar 7 reverse slide, makes tappet 5 move to rocking arm roller 32 on gradually and resumes contacts with cam 2, and valve 9 also recovers to work normally. Between peak and minimum point, be level and smooth fillet surface owing to supporting curved surface 62, this just makes the rectilinear motion that tappet 5 is flatness, and then make rocking arm 3 and cam 2 separate or contact process has transitionality, realize the smooth transition of resolving cylinder and its recovery process.
Claims (5)
1. an engine Duan Gang mechanism, comprise the cam-actuated rocking arm being driven by camshaft, and the valve that is connected in rocking arm one end, is driven by described rocking arm, it is characterized in that: also comprise be connected in the rocking arm other end relative with valve, described rocking arm is carried out to pushing tow or traction so that rocking arm and cam contact or the executing agency that separates; The tappet that described executing agency comprises can be straight-line, one end is connected with described rocking arm, and be arranged on the support portion of the tappet other end, described support portion is provided with the support curved surface that contacts and be slidably matched with tappet, also comprises and drives support portion motion so that tappet obtains the driving mechanism of the differing heights support of supporting curved surface at its linear movement direction.
2. engine Duan Gang according to claim 1 mechanism, is characterized in that: the difference in height between peak and minimum point that described support curved surface supports in tappet linear movement direction tappet is not less than the variable quantity of cam lift.
3. engine Duan Gang according to claim 1 mechanism, is characterized in that: described tappet slides and is plugged in cylinder cap.
4. according to the engine Duan Gang mechanism described in any one in claim 1 to 3, it is characterized in that: described driving mechanism comprises the tooth bar being connected with support portion, and that driven by stepper motor and described tooth bar meshed gears.
5. engine Duan Gang according to claim 1 mechanism, is characterized in that: on described rocking arm, be rotatably connected to and the cam rocker-arm roller coordinating that rolls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310453855.5A CN103470324B (en) | 2013-09-29 | 2013-09-29 | Engine Duan Gang mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310453855.5A CN103470324B (en) | 2013-09-29 | 2013-09-29 | Engine Duan Gang mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103470324A CN103470324A (en) | 2013-12-25 |
| CN103470324B true CN103470324B (en) | 2016-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310453855.5A Active CN103470324B (en) | 2013-09-29 | 2013-09-29 | Engine Duan Gang mechanism |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016119675A1 (en) * | 2015-01-30 | 2016-08-04 | 天津潜景技术咨询有限公司 | Electric cam valve driving mechanism having double springs |
| CN108952875B (en) * | 2018-09-05 | 2020-05-05 | 广西玉柴机器股份有限公司 | In-cylinder brake transmission device |
| CN112282885A (en) * | 2020-10-26 | 2021-01-29 | 奇瑞汽车股份有限公司 | Valve lift adjusting system |
| CN116420006A (en) * | 2020-11-10 | 2023-07-11 | 康明斯有限公司 | Tappet assembly for valve lift profile modification |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3239941A1 (en) * | 1982-10-28 | 1984-05-03 | Volkswagenwerk Ag, 3180 Wolfsburg | Device for switching off the valve mechanism of an internal combustion engine |
| US6360705B1 (en) * | 2000-10-19 | 2002-03-26 | General Motors Corporation | Mechanism for variable valve lift and cylinder deactivation |
| EP2050933A1 (en) * | 2007-10-17 | 2009-04-22 | Delphi Technologies, Inc. | Valve operating system comprising a two-step roller finger follower |
| CN103256124A (en) * | 2013-05-20 | 2013-08-21 | 田丽欣 | Engine valve control mechanism capable of stopping cylinders by turns |
| CN103306768A (en) * | 2012-03-12 | 2013-09-18 | 程钰 | Air distribution mechanism for engine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5219852B2 (en) * | 2009-01-22 | 2013-06-26 | 株式会社オティックス | Internal combustion engine pause device |
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2013
- 2013-09-29 CN CN201310453855.5A patent/CN103470324B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3239941A1 (en) * | 1982-10-28 | 1984-05-03 | Volkswagenwerk Ag, 3180 Wolfsburg | Device for switching off the valve mechanism of an internal combustion engine |
| US6360705B1 (en) * | 2000-10-19 | 2002-03-26 | General Motors Corporation | Mechanism for variable valve lift and cylinder deactivation |
| EP2050933A1 (en) * | 2007-10-17 | 2009-04-22 | Delphi Technologies, Inc. | Valve operating system comprising a two-step roller finger follower |
| CN103306768A (en) * | 2012-03-12 | 2013-09-18 | 程钰 | Air distribution mechanism for engine |
| CN103256124A (en) * | 2013-05-20 | 2013-08-21 | 田丽欣 | Engine valve control mechanism capable of stopping cylinders by turns |
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| Publication number | Publication date |
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| CN103470324A (en) | 2013-12-25 |
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