CN204140153U - The variable valve actuation of motor - Google Patents
The variable valve actuation of motor Download PDFInfo
- Publication number
- CN204140153U CN204140153U CN201420595930.1U CN201420595930U CN204140153U CN 204140153 U CN204140153 U CN 204140153U CN 201420595930 U CN201420595930 U CN 201420595930U CN 204140153 U CN204140153 U CN 204140153U
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- roller
- cam
- driving mechanism
- valve
- motor
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Abstract
A kind of variable valve actuation of motor, comprise engine valve, cam, tappet roller, roller shaft, roller shift fork and roller driving mechanism, roller driving mechanism is changed between first axial position of tappet roller on roller shaft and second axial position by roller shift fork, tappet roller is connected from different cams, produces different engine valve event.Roller driving mechanism comprises piston and spring, piston is connected with one end of roller shift fork, the other end of roller shift fork is provided with two pilot holes separated, and two pilot holes separated to be enclosed within roller shaft and to be clipped in the middle by tappet roller, and the roller shift fork that moves through of piston passes to tappet roller.The utility model adopts the roller driving mechanism be positioned at outside tappet roller, by roller shift fork wedge cam roller, simple and compact for structure, run reliably durable, application widely, as motor closes cylinder, engine braking, motor discard recirculation and motor startup and closedown etc.
Description
Technical field:
The utility model relates to mechanical field, particularly relates to the valve actuation field of motor, particularly a kind of variable valve actuation of motor.
Background technique:
In prior art, the conventional valve method for driving of motor is behaved and is known altogether, its application history of existing more than 100 year.But due to motor discharge and the extra demand of engine braking, increasing motor needs, on the basis of conventional valve motion, to increase other valve motion, as the valve motion of EGR and the valve motion of engine braking.Sometimes in order to increase fuel oil benefit, the valve of some cylinder of motor needs to close completely (valve motion is lost completely or eliminated), when closing cylinder except eliminating valve motion, also stops to in-cylinder injection fuel oil.
In order to obtain variable valve movements, such as the valve motion that two kinds different, people often need employing two cams and two rocking arms, as Chinese patent application CN 200920142242.9 and CN 201110001373.7.But and the motor of not all has arrangement mode or the space of two similar rocking arms.
Further, US Patent No. 6,293,248 (calendar year 2001s) disclosed the apparatus and method that two-cycle engine is braked.In order to realize two-cycle engine braking (producing twice engine braking in each engine cycle) in four stroke engine, except needs four cams, also must adopt four rocking arms: two exhaust rocker arms (wherein a braking is used), two intake rockers (wherein a braking is used), structure is all very complicated with control.
US Patent No. 7,980,211 (2011) disclose a kind of cam following mechanism driven for engine variable-valve.Wherein tappet roller can axially move on roller shaft, connects from different cams, realizes different valve events (Valve Events).But the piston of the cylinder piston mechanism of driving cam roller is tappet roller itself, and whole mechanism is integrated in tappet roller, and its reliability of operation and durability are affected.Because tappet roller is stressed very large, once tappet roller stress deformation, also just mean that piston is out of shape, whole cylinder piston mechanism will be stuck and lose efficacy.
Model utility content:
The purpose of this utility model is the variable valve actuation providing motor, described this engine variable-valve driving mechanism will solve in prior art to be needed to increase rocking arm to realize the technical problem of another kind of valve motion, occupies space, structure and control complexity, increase cost, reliability and poor durability and apply limited technical problem after particularly increasing rocking arm.
This engine variable-valve driving mechanism of the present utility model, comprise engine valve, cam, tappet roller, roller shaft, roller shift fork and roller driving mechanism, it is characterized in that: described tappet roller is placed on roller shaft, described roller driving mechanism is changed between first axial position of tappet roller on roller shaft and second axial position by roller shift fork, the valve event that two kinds of the corresponding motor of axial position that on roller shaft two of described tappet roller are different are different.
Further, described roller driving mechanism comprises piston and spring, described piston is connected with one end of roller shift fork, the other end of roller shift fork is provided with two pilot holes separated, two described pilot holes separated to be enclosed within roller shaft and tappet roller is sandwiched therebetween, the force direction of spring on piston is contrary with fluid matasomatism force direction suffered on piston, two kinds of described active forces are by piston driving roller shift fork, and roller shift fork is changed between first axial position of tappet roller on roller shaft and second axial position.
Further, described cam comprises two adjacent different cams, and when tappet roller is changed between first axial position and second axial position, different from two the respectively cam of tappet roller connects, and produces two kinds of different valve events.
Further, described cam is only containing a cam, the tappet roller being positioned at the first axial position is connected with described cam, produce a kind of valve event, when tappet roller moves to second axial position from first axial position on roller shaft, a cam described in tappet roller departs from, causes the valve motion of motor to be lost completely, and generation motor closes valve event during cylinder.
Further, described cam comprises the one in following cam:
1. for the cam of motor conventional admission door or exhaust valve event,
2. for the cam of engine braking,
3. the cam of recirculation is discarded for motor, and
4. for the cam of engine on or off.
Further, described motor comprises overhead cam engine, and described overhead cam engine comprises rocking arm, comprises described roller driving mechanism in rocking arm.
Further, described motor comprises push rod engine, and described push rod engine comprises cam follower, comprises described roller driving mechanism in cam follower.
Working principle of the present utility model is: when needing valve event (the Valve Event) of conversion engine, the valve control machanism (not shown) of motor is open-minded, first axial position of tappet roller on roller shaft is moved to second axial position by roller shift fork by roller driving mechanism, the motion that tappet roller obtains changes, and produces different engine valve event.
The utility model is compared with prior art, and its effect is actively with obvious.The utility model, by the axial position of wedge cam roller on roller shaft, realizes two or more different valve event, has the advantages such as simple and compact for structure, manufacture assembling is easy and be widely used.In addition, roller driving mechanism of the present utility model is positioned at outside tappet roller, does not have the active force of cam and corresponding distortion, more reliability and durability.
Accompanying drawing illustrates:
Fig. 1 is embodiment's cam roller of engine variable-valve driving mechanism of the present utility model schematic diagram when being in the first axial position.
Fig. 2 is embodiment's cam roller of engine variable-valve driving mechanism of the present utility model schematic diagram when being in the second axial position.
Embodiment:
Fig. 1 and Fig. 2 describes the position relationship in the embodiment of engine variable-valve driving mechanism of the present utility model between related components.These component are constituent elements of the valve actuation chain 200 of motor.Wherein be placed on roller shaft 231, roller shaft 231 is placed on parts 210 tappet roller 235 rotary type.Parts 210 can be the rocking arms of overhead cam engine, also can be that the cam follower of push rod engine is (because people are very familiar to motor, the component of some motor, as rocking arm, push rod, cam follower and valve etc., here do not list).Roller driving mechanism 100 is provided with in parts 210.Here roller driving mechanism 100 comprises spring 156 and piston 164.The side (in figure left side) of piston 164 is subject to the active force of spring 156, the opposite side (in figure right side) of piston 164 is subject to the active force of fluid (machine oil as motor), two force directions are contrary, piston 164 can be moved left and right in piston cylinder 260.Piston 164 is connected with one end 237 of roller shift fork 236, and (Placement is here the annular groove 126 that the connecting end 237 of roller shift fork 236 is positioned at piston 164, the guiding groove 270 of connecting end 237 is had) in parts 210, the other end of roller shift fork 236 is provided with two pilot holes separated 238 and 239, they are enclosed within roller shaft 231, and tappet roller 235 is between two pilot holes separated 238 and 239 of roller shift fork 236.The roller shift fork 136 that moves through of piston 164 passes to tappet roller 235, makes to move between first axial position (Fig. 1) of tappet roller 235 on roller shaft 231 and second axial position (Fig. 2).When tappet roller 235 is in first axial position, it is connected (Fig. 1) with the cam 230 on camshaft 225; When tappet roller 235 is in second axial position, it is connected (Fig. 2) with the cam 2302 on camshaft 225.
The operating process of the present embodiment is as follows.Piston 164 is biased in the bottom surface (on the right side) of piston cylinder 260 by spring 156, tappet roller 235 is pressed against the first axial position (right side in Fig. 1) by roller shift fork 236 by piston 164, tappet roller 235 is connected with cam 230, by the Movement transmit of cam 230 to the valve of motor, produce a kind of valve event.When needing the valve event of conversion engine, open the valve control machanism (not shown) of motor, by fluid, if engine motor oil is by fluid passage 214 input piston cylinder 260, the active force of oil pressure counter spring 156, piston 164 is moved on to the opening side (keep left side) of piston cylinder 260, piston 164 drives roller shift fork 236 tappet roller 235 to be pressed against the second axial position (left side in Fig. 2), tappet roller 235 is connected with cam 2302, by the Movement transmit of cam 2302 to the valve of motor, produce another kind of valve event.
Each cam in cam 230 and 2302 can contain at least one boss, comprise the boss of the conventional valve motion producing motor, produce the boss of engine braking, produce motor and discard the boss of recirculation and produce the startup of motor and the boss etc. of closedown.For example, when four-stroke motor needs two-cycle engine to brake, four cams can be adopted, one of them conventional admission cam, a braking intake cam, a conventional exhaust cam and a braking exhaust cam.When motor needs conventional running, intake cam roller is connected with conventional exhaust cam with conventional admission cam with exhaust cam roller with exhaust roller driving mechanism by air inlet roller driving mechanism respectively, produces conventional valve motion.But when motor needs two-cycle engine to brake, intake cam roller is connected with braking exhaust cam with braking intake cam with exhaust cam roller with exhaust roller driving mechanism by air inlet roller driving mechanism respectively, produces the valve motion of two stroke brakings.Here two stroke braking air inlets and exhaust cam all contain two or more boss.
A cam in cam 230 and 2302 also can without any boss, and this cam is now a cam base circle (cylinder) not producing any motion, for closing valve event time cylinder (Cylinder Cutout).When motor needs conventional running, tappet roller is connected with customary cam by roller driving mechanism, produces conventional valve motion.But when motor does not need valve motion, tappet roller is removed from customary cam by roller driving mechanism, is connected with the cam base circle not producing any motion, eliminate the valve motion of motor.
Above-mentioned explanation contains much concrete mode of execution, and this should not be regarded as the restriction to the utility model scope, but representatively concrete illustrations more of the present utility model, other differentiation many all likely therefrom produce.For example, the engine variable-valve driving mechanism shown here, not only can be used for overhead cam engine, also can be used for push rod/pushing type motor; Not only can be used for driving exhaust valve, also can be used to drive intake valve.
In addition, the roller driving mechanism shown here, can be not only piston and spring mechanism, also can be other mechanism, as the combination of hydraulic mechanism, pneumatic mechanism, electromagnetic mechanism, mechanical mechanism and said mechanism; Not only can be integrated in rocking arm, also can be included in other cam follower.And the variable valve actuation of other form in rocking arm or other engine components, can also be increased, together with the variable valve actuator for air shown, produce two or more engine valve event here.
Therefore, scope of the present utility model should not decided by above-mentioned concrete illustration, but is decided by affiliated claim and the suitable power of law thereof.
Claims (7)
1. the variable valve actuation of a motor, comprise engine valve, cam, tappet roller, roller shaft, roller shift fork and roller driving mechanism, it is characterized in that: described tappet roller is placed on roller shaft, described roller driving mechanism is changed between first axial position of tappet roller on roller shaft and second axial position by roller shift fork, the valve event that two kinds of the corresponding motor of axial position that on roller shaft two of described tappet roller are different are different.
2. engine variable-valve driving mechanism as claimed in claim 1, it is characterized in that: described roller driving mechanism comprises piston and spring, described piston is connected with one end of roller shift fork, the other end of roller shift fork is provided with two pilot holes separated, two described pilot holes separated to be enclosed within roller shaft and tappet roller is sandwiched therebetween, the force direction of spring on piston is contrary with fluid matasomatism force direction suffered on piston, two kinds of described active forces are by piston driving roller shift fork, roller shift fork moves between first axial position of tappet roller on roller shaft and second axial position.
3. engine variable-valve driving mechanism as claimed in claim 1, it is characterized in that: described cam comprises two adjacent different cams, when tappet roller is changed between first axial position and second axial position, different from two the respectively cam of tappet roller connects, and produces two kinds of different valve events.
4. engine variable-valve driving mechanism as claimed in claim 1, it is characterized in that: described cam is only containing a cam, the tappet roller being positioned at the first axial position is connected with described cam, produce a kind of valve event, when tappet roller moves to second axial position from first axial position on roller shaft, a cam described in tappet roller departs from, causes the valve motion of motor to be lost completely, and generation motor closes valve event during cylinder.
5. engine variable-valve driving mechanism as claimed in claim 1, is characterized in that: described cam comprises the one in following cam:
1) for the cam of motor conventional admission door or exhaust valve event,
2) for the cam of engine braking,
3) cam of recirculation is discarded for motor, and
4) for the cam of engine on or off.
6. engine variable-valve driving mechanism as claimed in claim 1, it is characterized in that: described motor comprises overhead cam engine, described overhead cam engine comprises rocking arm, comprises described roller driving mechanism in rocking arm.
7. engine variable-valve driving mechanism as claimed in claim 1, it is characterized in that: described motor comprises push rod engine, described push rod engine comprises cam follower, comprises described roller driving mechanism in cam follower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420595930.1U CN204140153U (en) | 2014-10-15 | 2014-10-15 | The variable valve actuation of motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420595930.1U CN204140153U (en) | 2014-10-15 | 2014-10-15 | The variable valve actuation of motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204140153U true CN204140153U (en) | 2015-02-04 |
Family
ID=52416846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420595930.1U Expired - Fee Related CN204140153U (en) | 2014-10-15 | 2014-10-15 | The variable valve actuation of motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204140153U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314633A (en) * | 2014-10-15 | 2015-01-28 | 上海尤顺汽车部件有限公司 | Variable valve driving mechanism of engine |
| WO2017162182A1 (en) * | 2016-03-25 | 2017-09-28 | 上海尤顺汽车部件有限公司 | Multifunctional engine brake |
-
2014
- 2014-10-15 CN CN201420595930.1U patent/CN204140153U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314633A (en) * | 2014-10-15 | 2015-01-28 | 上海尤顺汽车部件有限公司 | Variable valve driving mechanism of engine |
| CN104314633B (en) * | 2014-10-15 | 2017-01-18 | 上海尤顺汽车部件有限公司 | Variable valve driving mechanism of engine |
| WO2017162182A1 (en) * | 2016-03-25 | 2017-09-28 | 上海尤顺汽车部件有限公司 | Multifunctional engine brake |
| US10550740B2 (en) | 2016-03-25 | 2020-02-04 | Shanghai Universoon Autoparts Co., Ltd. | Multifunctional engine brake |
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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 |
Granted publication date: 20150204 Termination date: 20181015 |
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| CF01 | Termination of patent right due to non-payment of annual fee |