CN203626912U - Engine cylinder shutoff mechanism - Google Patents
Engine cylinder shutoff mechanism Download PDFInfo
- Publication number
- CN203626912U CN203626912U CN201320768769.9U CN201320768769U CN203626912U CN 203626912 U CN203626912 U CN 203626912U CN 201320768769 U CN201320768769 U CN 201320768769U CN 203626912 U CN203626912 U CN 203626912U
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- China
- Prior art keywords
- tappet
- rocking arm
- supporting surface
- driving
- supporting
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Abstract
The utility model relates to a mechanism used for controlling an engine valve, in particular to an engine cylinder shutoff mechanism. The engine cylinder shutoff mechanism comprises a rocker, a valve and a tappet, and also comprises a supporting part and a driving mechanism, wherein the rocker is driven by a cam which is driven by a camshaft; the valve is connected to one end of the rocker and is driven by the rocker; the tappet is connected to the other end, opposite to the valve, of the rocker and can move along the length direction of the tappet; the supporting part is arranged below the tappet and is matched with the bottom of the tappet in a contacting way, and is provided with a first supporting face which is used for supporting the tappet to enable the rocker to contact with the cam and a second supporting face which is used for supporting the tappet to enable the rocker to separate from the cam; the driving mechanism is provided with driving connection which is used for driving the supporting part to move to enable the first supporting face and the second supporting face to alternate and contact with the bottom of the tappet. After the technical scheme is adopted, when the cylinder shutoff of an engine is realized, the whole structure is simplified, and the controllability and the stability are higher.
Description
Technical field
The utility model relates to a kind of mechanism that engine valve is controlled, and relates in particular to a kind of motor Duan Gang mechanism.
Background technique
The height of petrol engine effective thermal efficiency, depends on the size of height, pumping loss and the frictional loss of indicated thermal efficiency.And the height of indicated thermal efficiency is by compression than impact, traditional throttle control load petrol engine is owing to limited by pinking, and compression ratio is limited in below 10: 1 conventionally, and low compression ratio causes low indicated thermal efficiency value.Frictional loss and pumping loss have consumed energy greatly, particularly, in the time of sub load, can make effective thermal efficiency decline.
Petrol engine adopts throttle control load, and valve lift and start-up time are constant, therefore in the time of sub load, in order to reduce air inflow, in the constant situation of cylinder internal volume, need to pass through partial throttling, air inlet restriction loss is increased, cause in-cylinder pressure to decline, thus restriction air inflow.Therefore intake process, in cylinder, negative pressure increases, and piston need to overcome larger resistance and complete intake process, can cause that pumping loss increases,, simultaneously as the deterioration of the combustion positions such as velocity of combustion reduction, circular wave increase etc. also can cause the increase of loss, and the thermal efficiency reduces.
And in city driving process, motor many places are in the little load of the slow-speed of revolution or low middle load operation operating mode, petrol engine utilizes throttle control load, and under this load, closure partially opens, and now pumping loss is very large.Passenger vehicle engine mostly is multi-cylinder engine, 4 cylinders, 8 cylinders, 12 cylinders, therefore, by disconnected cylinder technology energy cutout portion cylinder burning, and make all the other deflagrating jars can be operated in large load, throttle opening can control to largely, inhales loss thereby reduced pump, greatly improves Fuel Economy.More at present disconnected cylinder technology adopts and becomes cam profile mechanism, the normally variable valve actuator for air of mechanical type, hydraulic driving or Electromagnetic Drive, its complex structure, and being opened to valve from normal valve closes completely, in a circulation, complete, there is no transient process, in disconnected cylinder process, greatly increased the difficulty in engine load control.
Model utility content
For solving the deficiencies in the prior art, it is a kind of without the also motor Duan Gang mechanism of simplified structure that cam profile is made adjustment that the utility model provides.
For achieving the above object, motor Duan Gang of the present utility model mechanism, comprise the cam-actuated rocking arm being driven by camshaft, be connected in valve rocking arm one end, that driven by rocking arm, and be connected in the tappet rocking arm the other end relative with valve, that can move along self length direction, also comprise:
Supporting portion, is arranged on tappet below and contact cooperation with the bottom of tappet, and it has tappet support so that the first supporting surface that rocking arm contacts with cam, and tappet is supported so that the second supporting surface that rocking arm contacts with cam disengages;
Driving mechanism, and between supporting portion, there is the motion of driving supporting portion and the driving contacting with tappet bottom that the first supporting surface replaces with the second supporting surface is connected.
By the setting of supporting portion and driving mechanism, the contact that has realized rocking arm and cam with separate, and then realized the normal use of valve or closed, it is simple in structure, controls flexibly.
As the restriction to aforesaid way, supporting portion adopts cylindrical bar, the Cylinder Surface that the first described supporting surface is cylindrical bar, and the second supporting surface is the lower concave curved surface along the circumferential and recessed Cylinder Surface setting of cylindrical bar; Between described driving mechanism and supporting portion, having the driving that drives cylindrical bar to rotate along himself axis is connected.
As the further restriction to aforesaid way, the second described supporting surface comprises the circle arc support face arranging with the first supporting surface coaxial line, and is connected in the fillet surface between circle arc support face and the first supporting surface.By the setting of fillet surface, make tappet more steady by the transient process of the first supporting surface to the second surface of contact, improve the stability of whole system.
As the restriction to aforesaid way, described driving mechanism comprises the driven gear being coaxially connected with cylindrical bar, and engages the driving gear by power plant driving rotation being connected with driven gear.
As to improvement of the present utility model, on described rocking arm, be rotatably connected to and the cam rocker-arm roller coordinating that rolls.
In sum, adopt the technical solution of the utility model, in realizing the disconnected cylinder of motor, simplified overall structure, its controllability and stability are higher.
Brief description of the drawings
Below in conjunction with the drawings and the specific embodiments, the utility model is done further to describe in detail:
Fig. 1 is the utility model embodiment's overall structure schematic diagram;
Fig. 2 is the structural representation under another state of Fig. 1;
In figure:
1, camshaft; 2, cam; 3, rocking arm; 4, valve; 5, tappet; 6, rocker-arm roller; 7, supporting portion; 71, the first supporting surface; 72, the second supporting surface; 721, circle arc support face; 722, fillet surface; 81, driven gear; 82, driving gear.
Embodiment
The present embodiment relates to a kind of motor Duan Gang mechanism, and as shown in Figure 1, it comprises camshaft 1, on camshaft 1, be fixed with cam 2, below cam 2, be provided with rocking arm 3, wherein one end of rocking arm 3 is connected with valve 4, is connected with tappet 5 with respect to the other end of the rocking arm 3 of valve 4.Tappet 5 can move along the length direction of self, for this that realize tappet 5 moves, can, in the time that Ben Duan cylinder mechanism is installed, on motor, set up a guide sleeve, what tappet 5 was slided is placed in guide sleeve, to realize the movement of tappet 5 by guide sleeve.
Rocking arm 3 can move up and down under diagram visual angle, the top dead center place moving at it; rocking arm 3 contacts cooperation with cam 2, when being with moving cam 2 to rotate at camshaft 1, can be under the driving of cam 2; drive valve 4 to move; in order to improve the driving effect of cam 2 to rocking arm 3, reduce the two in the frictional force driving in engagement process, on the rocking arm 3 between valve 4 and tappet 5, rotate and be provided with rocker-arm roller 6; in the time that cam 2 drives rocking arm 3, cam 2 coordinates with rocker-arm roller 6 rollings.The lower dead center place that rocking arm 3 moves, cam 2 can disengage with rocker-arm roller 6, and now, cam 2 can not apply any driving force to rocking arm 3 in the time rotating.
For realize moving up and down of above-mentioned rocking arm 3 had top dead center position and bottom dead center position, below tappet 5, be provided with supporting portion 7, supporting portion 7 contacts cooperation with the bottom of tappet 5, to realize the support to tappet 5, on supporting portion 7, be provided with the first supporting surface 71 and the second supporting surface 72, by the first support of supporting surface 71 to tappet 5, make tappet 5 support rocking arm 3 dead-centre position thereon; By the second support of supporting surface 72 to tappet 5, can make tappet 5 support rocking arm 3 in its bottom dead center position.In the present embodiment, supporting portion 7 adopts cylindrical shaft structure, and the first supporting surface 71 is the Cylinder Surface of cylindrical bar outside, and the second supporting surface 72 is the lower concave curved surface along the circumferential and recessed Cylinder Surface setting of cylindrical bar; In order to realize the first supporting surface 71 of supporting portion 7 and alternately changing of the second supporting surface 72, to realize the first supporting surface 71 and the second supporting surface 72 alternately supporting tappet, also comprise a driving mechanism that drives supporting portion 7 to rotate as axle taking himself axis, driving mechanism in the present embodiment comprises the driven gear 81 being coaxially connected with cylindrical bar, and engages the driving gear 82 by power plant driving rotation being connected with driven gear 81.
In addition, in order to realize driving mechanism in the time driving supporting portion 7 to rotate, can smooth transition between the first supporting surface 71 and the second supporting surface 72, as shown in Figure 2, the second supporting surface 72 comprises the circle arc support face 721 arranging with the first supporting surface 71 coaxial lines, and is connected in the fillet surface 722 between circle arc support face 721 and the first supporting surface 71.
In normal operation, the first supporting surface 71 in supporting portion 7 is positioned at the below of tappet 5, by the first supporting surface 71, tappet 5 is supported, now, rocking arm 3 is positioned at the top dead center place of its shift motion, rocker-arm roller 6 can contact with the basic circle gabarit place of cam 2, in the time that camshaft 1 is with moving cam 2 to rotate, cam 2 is rolled and coordinates with rocker-arm roller 6 by the cam curve of its gabarit, and then drive rocking arm to move, due to the support of tappet 5 to rocking arm 3, cam 2 is in the time driving rocking arm motion, realize moving up and down of valve 4, and then the opening and closing of valve are realized, after cylinder deactivation signal sends, drive driving gear 82 to rotate by not shown stepper motor, and then drive supporting portion 7 to rotate by driven gear 81, supporting portion 7 is in the time rotating, the first surface 71 that makes to be positioned at tappet 5 belows leaves the below of tappet 5, and make gradually the second supporting surface 72 be positioned at the below of tappet 5, until after tappet 5 contacts with circle arc support face 721, stepper motor stops, its state as shown in Figure 2, now, the drive rocking arm of tappet 5 moves down, make rocking arm be positioned at the lower dead center of its shift motion, and then Rocker arm 4 is contacted with cam disengages, the driving force transmission of cam is less than valve, and then reach the effect of closing valve.
Claims (5)
1. a motor Duan Gang mechanism, comprise the cam-actuated rocking arm being driven by camshaft, be connected in valve rocking arm one end, that driven by rocking arm, and be connected in the tappet rocking arm the other end relative with valve, that can move along self length direction, characterized by further comprising:
Supporting portion, is arranged on tappet below and contact cooperation with the bottom of tappet, and it has tappet support so that the first supporting surface that rocking arm contacts with cam, and tappet is supported so that the second supporting surface that rocking arm contacts with cam disengages;
Driving mechanism, and between supporting portion, there is the motion of driving supporting portion and the driving contacting with tappet bottom that the first supporting surface replaces with the second supporting surface is connected.
2. motor Duan Gang according to claim 1 mechanism, is characterized in that: supporting portion adopts cylindrical bar, the Cylinder Surface that the first described supporting surface is cylindrical bar, and the second supporting surface is along the circumferential of cylindrical bar and lower concave curved surface that recessed Cylinder Surface arranges; Between described driving mechanism and supporting portion, having the driving that drives cylindrical bar to rotate along himself axis is connected.
3. motor Duan Gang according to claim 2 mechanism, is characterized in that: the second described supporting surface comprises the circle arc support face arranging with the first supporting surface coaxial line, and is connected in the fillet surface between circle arc support face and the first supporting surface.
4. according to the motor Duan Gang mechanism described in claim 2 or 3, it is characterized in that: described driving mechanism comprises the driven gear being coaxially connected with cylindrical bar, and engage the driving gear by power plant driving rotation being connected with driven gear.
5. motor 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 |
|---|---|---|---|
| CN201320768769.9U CN203626912U (en) | 2013-11-29 | 2013-11-29 | Engine cylinder shutoff mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320768769.9U CN203626912U (en) | 2013-11-29 | 2013-11-29 | Engine cylinder shutoff mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203626912U true CN203626912U (en) | 2014-06-04 |
Family
ID=50813400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320768769.9U Expired - Fee Related CN203626912U (en) | 2013-11-29 | 2013-11-29 | Engine cylinder shutoff mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203626912U (en) |
-
2013
- 2013-11-29 CN CN201320768769.9U patent/CN203626912U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140604 Termination date: 20211129 |