CN201924978U - Combined rocker arm device used for generating auxiliary air valve movement of engine - Google Patents
Combined rocker arm device used for generating auxiliary air valve movement of engine Download PDFInfo
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- CN201924978U CN201924978U CN 201020677458 CN201020677458U CN201924978U CN 201924978 U CN201924978 U CN 201924978U CN 201020677458 CN201020677458 CN 201020677458 CN 201020677458 U CN201020677458 U CN 201020677458U CN 201924978 U CN201924978 U CN 201924978U
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- rocker arm
- auxiliary
- arm
- rocking arm
- engine
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Abstract
A combined rocker arm device used for generating auxiliary air valve movement of an engine comprises an auxiliary rocker arm and a transitional rocker arm, wherein the engine comprises a conventional valve drive chain; the conventional valve drive chain comprises a cam, a rocker shaft, a conventional rocker arm and an air valve; the auxiliary rocker arm and the conventional rocker arm are mounted side by side on the rocker shaft; one end of the auxiliary rocker arm is contacted with the outer contour of the cam, while the other end of the auxiliary rocker arm is arranged above the transitional rocker arm; and the transitional rocker arm is positioned above the air valve of the engine. An auxiliary boss on the cam drives the auxiliary rocker arm, the transitional rocker arm and the air valve to generate auxiliary air valve movement, which can be used for exhaust gas recirculation and engine braking. The combined rocker arm device requires no increase of small increases in the height, the volume and the weight of the engine, widens the application ranges of the special cam and the special rocker arm braking device, improves the braking performance of the engine, and reduces the influence of the braking operation of the engine on the igniting operation of the engine.
Description
Technical field:
The utility model relates to mechanical field, relates in particular to the valve actuation technology of vehicle motor, particularly a kind of duplicated crank device that is used to produce the motor auxiliary valve motion.
Background technique:
In the prior art, the method for the conventional valve actuation of vehicle motor is behaved and is known altogether, and it uses the history in existing more than 100 year.But owing to the extra demand to engine emission and engine braking, increasing motor need increase auxiliary valve motion, as be used for the valve motion of exhaust gas recirculation and the valve motion of engine braking on the basis of conventional valve motion.Especially, engine brake has become the device that heavy-duty commercial vehicle engine must be joined gradually.
The engine braking technology also is widely known by the people.Only need motor temporarily is converted to compressor.Cut off fuel oil in the transfer process, when the approaching end of engine piston compression stroke, open exhaust valve, allowing to be compressed gas (being air during braking) is released, the motor energy that pressurized gas absorbed in compression stroke, can not turn back to engine piston at expansion stroke subsequently, but dissipate by the exhaust and the radiation system of motor.Final result is effective engine braking, slows down the speed of vehicle.
Engine braking has many different types.Generally, the engine braking running is to add the auxiliary valve motion that is used for engine braking in the conventional valve motion process of motor.How to produce according to this auxiliary valve motion, engine braking can be defined as:
1.I h type engine h braking: auxiliary valve motion is introduced from the existing contiguous cam of motor, produces so-called " all can " and (Jake) brakes;
2.II h type engine h braking: auxiliary valve motion is by changing existing cam curve, producing motion and lose the h type engine h braking;
3.III the h type engine h braking: auxiliary valve motion comes from special-purpose brake cam, by special-purpose brake rocker arm, produces special-purpose braking valve motion;
4.IV the h type engine h braking: auxiliary valve motion is obtained by the valve motion that changes available engine, produces the h type engine h braking of losing heart usually; And
5.V h type engine h braking: auxiliary valve motion is used special valve system, generates a special valve (the 5th valve) engine braking.
A precedent of engine braking apparatus is that the U.S. Patent number 3220392 that is provided by comings (Cummins) discloses, according to the braking system of this patent manufacturing commercial very successful.But, this type of engine braking system is the annex of overhead on motor.For this type of device is installed, between cylinder and valve gap, to add packing ring, therefore, increased height, weight and the cost of motor extraly.
In above-mentioned five kinds of engine braking types, the third, just the braking force of dedicated cam or dedicated rocker arm braking device is best.But existing dedicated rocker arm braking device can't be applied to parallel with rocking arm or the almost parallel motor of air valve bridge (being the valve bridge again).
Summary of the invention:
The purpose of this utility model is to provide a kind of duplicated crank device that is used to produce the motor auxiliary valve motion, the described this duplicated crank device that is used for producing the motor auxiliary valve motion will solve the special-purpose rocking arm braking device of prior art can't be applied to technical problem in the valve bridge motor parallel with rocking arm, will solve height, weight and cost techniques problem that traditional engine braking apparatus increases motor simultaneously.
This duplicated crank device that is used to produce the motor auxiliary valve motion of the present utility model, described motor comprises conventional valve actuation chain, described conventional valve actuation chain comprises cam; pitman arm shaft; conventional rocking arm and valve; wherein; described duplicated crank device comprises auxiliary rocker arm and transition rocking arm; described auxiliary rocker arm and conventional rocking arm are installed on the described pitman arm shaft abreast; an end of described auxiliary rocker arm contacts with the external frame of described cam; the other end of described auxiliary rocker arm is positioned at the top of described transition rocking arm, and described transition rocking arm is positioned at the top of described valve.
Further, described cam comprises the conventional boss that drives conventional rocking arm, and the conventional valve motion of described conventional rocker actuated engine also comprises the auxiliary boss that drives auxiliary rocker arm, and described auxiliary rocker arm drives the motor auxiliary valve motion.
Further, described motor auxiliary valve motion comprises the valve motion that is used for engine braking.
Further, described auxiliary rocker arm is a brake rocker arm, and described brake rocker arm comprises braking drive organ, is provided with spool in the described braking drive organ, and described braking drive organ contains off position and operating position; At off position, the withdrawal of the spool of described braking drive organ, described auxiliary rocker arm and described transition sub rocker arm from, at operating position, the spool of described braking drive organ stretches out, and described auxiliary rocker arm links to each other with described transition rocking arm.
Further, be installed on the described conventional rocking arm to described transition rocker arms roll formula, the axis of rocking of described transition rocking arm is parallel with the pitman arm shaft of described conventional rocking arm.
Further, the pitman arm shaft of the axis of rocking of described transition rocking arm and described conventional rocking arm is a same pitman arm shaft.
Further, include secondary spring in the described duplicated crank device, described secondary spring is between described auxiliary rocker arm and transition rocking arm.
Further, described transition rocking arm is connected with and shakes position-limit mechanism.
Working principle of the present utility model is: when the auxiliary valve motion that needs motor, just need motor when normal working is converted to the engine braking state, the braking control mechanism of motor is open-minded, auxiliary rocker arm, just the braking drive organ in the brake rocker arm reaches operating position from off position, makes auxiliary rocker arm be connected with the transition rocking arm.Auxiliary boss on the engine cam, the motion of just braking boss by auxiliary rocker arm and transition rocking arm, is delivered on the exhaust valve, increases auxiliary valve motion, realizes the switching of motor from normal working to the engine braking state.When not needing engine braking, the braking control mechanism of motor cuts out, braking drive organ is withdrawn into off position from operating position, make auxiliary rocker arm and transition sub rocker arm from, the motion of braking boss can't be delivered on the exhaust valve, motor breaks away from the braking running, gets back to normal working.
The utility model and prior art are compared, and its effect is actively with tangible.Height, volume and weight that the utility model can not increase or reduce and add motor; Enlarged the application area of dedicated cam and dedicated rocker arm braking device, improved the braking ability of motor, reduced the influence of engine braking running the engine ignition running.
Description of drawings:
Fig. 1 is the location diagram between transition rocking arm, conventional rocking arm and the valve actuation chain of a kind of duplicated crank device that is used for producing the motor auxiliary valve motion of the utility model, a part of only having drawn auxiliary rocker arm among the figure.
Fig. 2 is the plan view of the transition rocking arm of a kind of duplicated crank device that is used for producing the motor auxiliary valve motion of the utility model.
Fig. 3 is the plan view of the transition rocking arm of a kind of duplicated crank device that is used for producing the motor auxiliary valve motion of the utility model.
Fig. 4 is the auxiliary rocker arm of a kind of duplicated crank device that is used for producing the motor auxiliary valve motion of the utility model and the location diagram of conventional rocking arm.
To be that the utility model is a kind of be used for producing the auxiliary rocker arm (for brake rocker arm) of the duplicated crank device of motor auxiliary valve motion and the schematic representation of relative position thereof to Fig. 5.
Fig. 6 is the conventional valve motion curve of a kind of duplicated crank device that is used for producing the motor auxiliary valve motion of the utility model and the schematic representation of auxiliary valve motion (engine braking valve motion) curve.
Embodiment:
Embodiment 1:
As Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and shown in Figure 6, this duplicated crank device that is used to produce the motor auxiliary valve motion of the present utility model comprises auxiliary rocker arm 2102 and transition rocking arm 2103, described motor comprises conventional valve actuation chain, described conventional valve actuation chain comprises cam; pitman arm shaft 205; conventional rocking arm 210 and valve; described auxiliary rocker arm 2102 and conventional rocking arm 210 are installed on the described pitman arm shaft 205 abreast; an end of described auxiliary rocker arm 2102 contacts with the external frame of described cam; the other end of described auxiliary rocker arm 2102 is positioned at the top of described transition rocking arm 2103, and described transition rocking arm 2103 is positioned at the top of described valve.
Further, described cam comprises the conventional boss that drives conventional rocking arm 210, described conventional rocking arm 210 drives the conventional valve motion of motor, also comprises the auxiliary boss that drives auxiliary rocker arm 2102, and described auxiliary rocker arm 2102 drives the motor auxiliary valve motion.
Further, described motor auxiliary valve motion comprises the valve motion that is used for engine braking.
Further, described auxiliary rocker arm 2102 is brake rocker arms, and described brake rocker arm comprises braking drive organ, is provided with spool in the described braking drive organ, and described braking drive organ contains off position and operating position; At off position, the spool withdrawal of described braking drive organ, described auxiliary rocker arm 2102 separates with described transition rocking arm 2103, at operating position, the spool of described braking drive organ stretches out, and described auxiliary rocker arm 2102 links to each other with described transition rocking arm 2103.
Further, described transition rocking arm 2103 is installed on the described conventional rocking arm 210 rock typely, and the axis of rocking of described transition rocking arm 2103 is parallel with the pitman arm shaft of described conventional rocking arm 210.
Further, the pitman arm shaft 205 of the axis of rocking of described transition rocking arm 2103 and described conventional rocking arm 210 is a same pitman arm shaft.
Further, include secondary spring in the described duplicated crank device, described secondary spring is between described auxiliary rocker arm 2102 and transition rocking arm 2103.
Further, described transition rocking arm 2103 is connected with and shakes position-limit mechanism.
Fig. 1 is the location diagram between transition rocking arm 2103 and conventional rocking arm 210 and the valve chain 200 among the embodiment of duplicated crank device of the present utility model.The conventional exhaust valve motion of motor is produced by the exhaust valve chain 200 of motor.Exhaust valve chain 200 comprises cam 230, cam follower wheel 235, conventional rocking arm 210, valve bridge 400 and exhaust valve 300, exhaust valve 300 is made of exhaust valve 3001 and exhaust valve 3002, exhaust valve 300 is biased on the valve seat 320 of engine cylinder-body 500 by the valve spring 3101 and 3102 of motor, stops gas to flow between engine cylinder and outlet pipe 600.Conventional rocking arm 210 is installed on the pitman arm shaft 205 rock typely, with the motion of cam 230, passes to exhaust valve 300, and it is is periodically opened and closed.Exhaust valve chain 200 also comprises valve clearance adjusting screw 110 and resembles foot pad 114.Valve clearance adjusting screw 110 is fixed tightly on the rocking arm 210 by nut 105.Cam 230 has a conventional boss 220 at interior basic circle more than 225, produce conventional valve lift curve (see Fig. 6 2202), and the routine (igniting) that is used for motor operates.
Certainly, transition rocking arm 2103 also can not need braking mandril 116, act directly on valve bridge 400 or exhaust valve 3001 above.
Fig. 2 and Fig. 3 are respectively the plan view and the plan views of transition rocking arm 2103, are used for further describing the position relation between transition rocking arm 2103 and auxiliary rocker arm 2102 and the braking mandril 116 (or exhaust valve 3001).The upper side 2181 of transition rocking arm 2103 close exhaust valve one ends 218 is subjected to the effect of auxiliary rocker arm 2102, and its downside 2182 then acts on braking mandril 116 (or exhaust valve 3001), and distance is 279 between two point of action, as shown in Figure 3.
Fig. 4 is the location diagram of auxiliary rocker arm 2102 and conventional rocking arm 210 among the embodiment of duplicated crank device of the present utility model.Auxiliary rocker arm 2102 and conventional rocking arm 210 are installed on the pitman arm shaft 205 abreast.
Fig. 5 is the schematic representation of (being brake rocker arm herein) 2102 of auxiliary rocker arm among the embodiment of duplicated crank device of the present utility model and relative position thereof.Brake rocker arm 2102 comprises braking drive organ 100, and braking drive organ 100 comprises hydraulic circuit and spool 1103.Braking drive organ 100 contains off position and operating position.At off position shown in Figure 5, when just not needing engine braking, spool 1103 withdrawals of braking drive organ 100, auxiliary rocker arm 2102 separates with transition rocking arm 2103, its gap is 132, gap 132 can be regulated by the adjusting screw 1102 of braking valve clearance controlling mechanism, thereby guarantees auxiliary boss (braking boss) 232 and 233 motions that produced on the basic circle 2252 in the brake cam 2302, can't be delivered on the exhaust valve 3001.
When the needs auxiliary valve motion, just during engine braking, engine braking control mechanism (not shown) is opened fuel feeding, machine oil acts on braking drive organ 100, make its spool 1103 reach operating position from the off position (Fig. 5) of withdrawal, eliminated the gap 132 between auxiliary rocker arm 2102 and the transition rocking arm 2103, auxiliary rocker arm 2102 links to each other with transition rocking arm 2103.Move through follower 2352, auxiliary rocker arm 2102 and braking drive organ 100 thereof, transition rocking arm 2103 and braking mandril 116 that auxiliary boss (braking boss) 232 and 233 in the brake cam 2302 on the basic circle 2252 is produced are delivered to exhaust valve 3001, produce the auxiliary valve motion of engine braking.
Shown secondary spring or the brake spring 198 among Fig. 1 among Fig. 5 once more.Secondary spring 198 separates both between auxiliary rocker arm 2102 and transition rocking arm 2103.The power that spring 198 makes progress is biased on the brake cam 2302 auxiliary rocker arm 2102.Spring 198 downward power then make transition rocking arm 2103 be biased on the braking mandril 116.Drive when down moving when braking mandril 116 is deflated a chain 200 (Fig. 1) in company with valve bridge 400 and exhaust valve 300, spring 198 downward power then make transition rocking arm 2103 be biased on the conventional rocking arm 210 (Fig. 1).
If the distortion of spring 198 is enough big, transition rocking arm 2103 can not need to shake position-limit mechanism, that is to say, does not need positive stop end 217.Like this, transition rocking arm 2103 has just become a kind of " half rocking arm ", remains with braking mandril 116 (or exhaust valve 3001) to contact.Notice, require the pretightening force of the power of secondary spring or brake spring 198 here much smaller than engine valve spring 3101.
Fig. 6 is the duplicated crank device embodiment's of the present utility model conventional valve motion curve 2202 and the schematic representation of auxiliary valve motion (engine braking valve motion) curve 2322 and 2332.Conventional boss 220 in the cam 230 among conventional valve motion curve 2202 and Fig. 1 on the basic circles 225 is corresponding, by 200 generations of valve actuation chain.Auxiliary valve motion (engine braking valve motion) curve 2322 with 2332 with Fig. 5 in brake cam 2302 in auxiliary boss (braking boss) 232 and 233 on the basic circles 2252 corresponding, produce by auxiliary rocker arm 2102 and transition rocking arm 2103.
Conventional valve motion curve 2202 is what to separate with auxiliary valve motion curve 2322 and 2332 among Fig. 6, means that the motion phase of conventional rocking arm 210 and auxiliary rocker arm 2102 staggers, both motion mutual noninterferences.When auxiliary rocker arm 2102 promoted 2103 motions of transition rocking arm, conventional rocking arm 210 was actionless.Therefore, the axis of rocking 2052 (Fig. 1) that is placed in the transition rocking arm 2103 on the conventional rocking arm 210 also is actionless.That is to say that the auxiliary boss 232 on cam 2302 (Fig. 5) and 233 promotes auxiliary rocker arm 2102, transition rocking arm 2103 and valve 3001 and produces in the process of auxiliary valve motion 2322 and 2332, the axis that shakes of transition rocking arm 2103 is actionless.
Can infer also that thus if having living space on the pitman arm shaft 205, transition rocking arm 2103 also can use pitman arm shaft 205.Like this, the axis of rocking 2052 of transition rocking arm 2103 has just become same pitman arm shaft 205 with the pitman arm shaft 205 of conventional rocking arm 210.
Above-mentioned explanation has comprised a lot of concrete mode of executions, and this should not be regarded as the restriction to the utility model scope, but as representative concrete illustrations more of the present utility model, many other differentiation all might therefrom produce.For instance, the duplicated crank device of Xian Shiing here not only can be used for producing the auxiliary valve motion of engine braking, also can be used for producing other auxiliary valve motion such as exhaust gas recirculation.
In addition, show here the duplicated crank device, not only can be used for overhead cam engine, also can be used for push rod/tubular type motor; Not only can be used for driving exhaust valve, also can be used to drive intake valve.
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 (8)
1. duplicated crank device that is used to produce the motor auxiliary valve motion, described motor comprises conventional valve actuation chain, described conventional valve actuation chain comprises cam; pitman arm shaft; conventional rocking arm and valve; it is characterized in that: described duplicated crank device comprises auxiliary rocker arm and transition rocking arm; described auxiliary rocker arm and conventional rocking arm are installed on the described pitman arm shaft abreast; an end of described auxiliary rocker arm contacts with the external frame of described cam; the other end of described auxiliary rocker arm is positioned at the top of described transition rocking arm, and described transition rocking arm is positioned at the top of described valve.
2. the duplicated crank device that is used to produce the motor auxiliary valve motion as claimed in claim 1, it is characterized in that: described cam comprises the conventional boss that drives conventional rocking arm, the conventional valve motion of described conventional rocker actuated engine, also comprise the auxiliary boss that drives auxiliary rocker arm, described auxiliary rocker arm drives the motor auxiliary valve motion.
3. the duplicated crank device that is used to produce the motor auxiliary valve motion as claimed in claim 2 is characterized in that: described motor auxiliary valve motion comprises the valve motion that is used for engine braking.
4. the duplicated crank device that is used to produce the motor auxiliary valve motion as claimed in claim 1, it is characterized in that: described auxiliary rocker arm is a brake rocker arm, described brake rocker arm comprises braking drive organ, be provided with spool in the described braking drive organ, described braking drive organ contains off position and operating position; At off position, the withdrawal of the spool of described braking drive organ, described auxiliary rocker arm and described transition sub rocker arm from, at operating position, the spool of described braking drive organ stretches out, and described auxiliary rocker arm links to each other with described transition rocking arm.
5. the duplicated crank device that is used to produce the motor auxiliary valve motion as claimed in claim 1, it is characterized in that: be installed on the described conventional rocking arm to described transition rocker arms roll formula, the axis of rocking of described transition rocking arm is parallel with the pitman arm shaft of described conventional rocking arm.
6. the duplicated crank device that is used to produce the motor auxiliary valve motion as claimed in claim 1 is characterized in that: the axis of rocking of described transition rocking arm and the pitman arm shaft of described conventional rocking arm are same pitman arm shaft.
7. the duplicated crank device that is used to produce the motor auxiliary valve motion as claimed in claim 1 is characterized in that: include secondary spring in the described duplicated crank device, described secondary spring is between described auxiliary rocker arm and transition rocking arm.
8. the duplicated crank device that is used to produce the motor auxiliary valve motion as claimed in claim 1 is characterized in that: described transition rocking arm is connected with and shakes position-limit mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020677458 CN201924978U (en) | 2010-12-21 | 2010-12-21 | Combined rocker arm device used for generating auxiliary air valve movement of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020677458 CN201924978U (en) | 2010-12-21 | 2010-12-21 | Combined rocker arm device used for generating auxiliary air valve movement of engine |
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| Publication Number | Publication Date |
|---|---|
| CN201924978U true CN201924978U (en) | 2011-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020677458 Expired - Fee Related CN201924978U (en) | 2010-12-21 | 2010-12-21 | Combined rocker arm device used for generating auxiliary air valve movement of engine |
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| CN (1) | CN201924978U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562214A (en) * | 2010-12-21 | 2012-07-11 | 上海尤顺汽车部件有限公司 | Compound rocker arm device used for producing auxiliary valve movement of engine |
| CN104564211A (en) * | 2013-10-15 | 2015-04-29 | 上海尤顺汽车部件有限公司 | Method and device for optimizing low-speed performance of internal combustion engine as well as method and device for starting internal combustion engine |
| CN104712397A (en) * | 2015-03-05 | 2015-06-17 | 上海尤顺汽车部件有限公司 | Combined rocker engine braking device |
| CN105507974A (en) * | 2014-09-30 | 2016-04-20 | 上海尤顺汽车部件有限公司 | Auxiliary valve actuating mechanism of engine |
| CN109139171A (en) * | 2017-06-28 | 2019-01-04 | 黄河水利职业技术学院 | A kind of device can control engine throttled back |
-
2010
- 2010-12-21 CN CN 201020677458 patent/CN201924978U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562214A (en) * | 2010-12-21 | 2012-07-11 | 上海尤顺汽车部件有限公司 | Compound rocker arm device used for producing auxiliary valve movement of engine |
| CN104564211A (en) * | 2013-10-15 | 2015-04-29 | 上海尤顺汽车部件有限公司 | Method and device for optimizing low-speed performance of internal combustion engine as well as method and device for starting internal combustion engine |
| CN105507974A (en) * | 2014-09-30 | 2016-04-20 | 上海尤顺汽车部件有限公司 | Auxiliary valve actuating mechanism of engine |
| CN105507974B (en) * | 2014-09-30 | 2018-11-02 | 上海尤顺汽车部件有限公司 | A kind of engine auxiliary valve driving mechanism |
| CN104712397A (en) * | 2015-03-05 | 2015-06-17 | 上海尤顺汽车部件有限公司 | Combined rocker engine braking device |
| CN109139171A (en) * | 2017-06-28 | 2019-01-04 | 黄河水利职业技术学院 | A kind of device can control engine throttled back |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20110810 Termination date: 20181221 |