CN205089460U - Compression release type engine brake device - Google Patents
Compression release type engine brake device Download PDFInfo
- Publication number
- CN205089460U CN205089460U CN201520856103.8U CN201520856103U CN205089460U CN 205089460 U CN205089460 U CN 205089460U CN 201520856103 U CN201520856103 U CN 201520856103U CN 205089460 U CN205089460 U CN 205089460U
- Authority
- CN
- China
- Prior art keywords
- valve
- engine
- motor
- piston bore
- compression
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model provides a compression release type engine brake device, be provided with main piston hole and vice piston hole at the box like valve inner bridge, be provided with hydraulic pressure passageway and check valve between main piston hole and the vice piston hole, the outer end of the downthehole main piston of main piston links to each other with the cam, the outer end of the vice piston in the vice piston hole links to each other with the valve, be provided with an oilhole in the box at the bottom of the vice piston hole, it fixes on the engine just adjacently with the box in the exit of oilhole to end position mechanism, compression release braking boss the latter half of engine compression stroke start from scratch rise and top dead center at the engine compression stroke before reach the highest lift, the check valve prevents the main piston hole of flowing back of the fluid in the vice piston hole, main piston and the cam continuous with the main piston are given in the unable passback of fluid pressure on the vice piston, but directly transfer and end position mechanism. The utility model discloses reduce the brake load on the valve drive chain, increased the reliability and the durability of engine.
Description
Technical field:
The utility model relates to mechanical field, particularly relates to engine braking technology, particularly a kind of compression-release engine braking device.
Background technique:
Engine braking can be divided into compression-release to brake and type braking of losing heart.
The compression-release braking of motor opens exhaust valve in the latter half of engine piston compresses stroke.A precedent of compression-release break is disclosed at U.S. Patent number 3220392 in nineteen sixty-five by comings (Cummins), and machinery input is delivered to the exhaust valve that will open through oil hydraulic circuit by its braking system.Oil hydraulic circuit is usually included in reciprocating main piston in master piston bore, this to-and-fro motion comes from the machinery input of motor, such as the motion of the motion of motor injection cam or adjacent exhaust cam.The hydraulic fluid that moves through of main piston is delivered to sub-piston on oil hydraulic circuit, and make its to-and-fro motion in slave piston bore, sub-piston acts on exhaust valve directly or indirectly, produces the valve motion of engine braking running.
The disappointing type braking of motor is that exhaust valve is except opening normally, in partial periodicity, also keep perseverance in a small amount to open (partial periodicity loses heart and brakes), or (aspirating stroke, compression stroke, and expansion stroke) keeps perseverance in a small amount to open (complete period disappointing braking) within the cycle of non-exhaust stroke.Partial periodicity lose heart braking and the complete period lose heart brake the main distinction be that the former does not open exhaust valve in most aspirating stroke.
The compression-release braking of motor and the difference of type braking of losing heart mainly contain 2 points.First main distinction is open phase (period of braking) difference of braking exhaust valve.Complete period lose heart type braking braking exhaust valve open all the time, therefore do not involve the opening time.Lose heart opening time of braking exhaust valve of type braking of partial periodicity is latter half of the aspirating stroke at motor; And opening time of braking exhaust valve of compression-release braking is the latter half of the compression stroke at motor, late more a lot of than lose heart opening time of braking exhaust valve of type braking of partial periodicity.Second main distinction is Lift (brake valve liter) difference of braking exhaust valve.In general, compression-release engine braking has larger braking force than disappointing type braking, but also produces larger brake load simultaneously.
Summary of the invention:
The purpose of this utility model is to provide a kind of compression-release engine braking device, and described this braking device will solve the not enough and technical problem that compression-release engine braking device brake load is bigger than normal of the braking force of air-leakage type engine brake device in prior art.
This compression-release engine braking device of the present utility model, comprise a casing, stop mechanism, oil feeding mechanism, non-return mechanism, the cam of motor and the valve of motor, it is characterized in that: in described casing, be provided with a master piston bore and a slave piston bore, the hydraulic channel of connection is provided with between described master piston bore and slave piston bore, be provided with a main piston master piston bore inner sliding type, be provided with a sub-piston slave piston bore inner sliding type, the outer end of main piston is connected with described cam, driving mechanism is set between the outer end of sub-piston and described valve, an oilhole is provided with in casing at the bottom of slave piston bore, described stop mechanism is fixed on the engine and adjacent with casing in the outlet port of described oilhole, described oil feeding mechanism comprises oil supply gallery and unidirectional delivery valve, described unidirectional delivery valve is arranged in oil supply gallery or is arranged between oil supply gallery and master piston bore, described non-return mechanism comprises safety check, described safety check to be arranged between master piston bore and slave piston bore and to keep normal off status, described engine cam comprises compression-release braking boss, described compression release braking boss is started from scratch in the latter half of engine compression strokes and is risen and reached top lift before the top dead center of engine compression strokes.
Further, described engine cam also comprises the conventional boss of the motor raised, it is contour that the lower part of the conventional boss of the motor raised and compression-release brake boss, the upper part of the conventional boss of the motor raised is substantially identical with the conventional boss of motor, described compression release braking boss keeps described top lift, until transition enters the upper part of the conventional boss of the motor raised smoothly reached top lift before the top dead center of engine compression strokes after.
Further, described casing comprises the valve bridge of motor, described valve comprises the first valve and the duaspiracle of motor, described master piston bore is arranged on the middle part of valve bridge and upward opening, described slave piston bore be arranged on valve bridge one end and under shed, the outer end of the main piston in master piston bore is connected with one end of the rocking arm of motor, the other end of rocking arm is connected with cam, the outer end of the sub-piston in slave piston bore is connected with the first described valve, the downside of the other end of valve bridge is connected with described duaspiracle, described oilhole is provided with in valve bridge at the bottom of slave piston bore, described stop mechanism is fixed on the engine and adjacent with valve bridge in the outlet port of described oilhole, hydraulic channel is provided with in described sub-piston, described safety check is arranged on the outlet port of hydraulic channel in sub-piston.
Further, described compression-release engine braking device also comprises brake clearance compensation mechanism, described brake clearance compensation mechanism comprises to be prevented flying off spring and resembling sufficient pad, the one end resembling foot pad is concave spherical surface and is connected with the rocking arm of motor by the pressure ball face of adjustable clearance, the other end resembling foot pad is connected with the push rod of motor, anti-one end flying off spring is placed on rocking arm, and the anti-the other end flying off spring is placed in and resembles on foot pad.
The utility model is compared with prior art, and its effect is actively with obvious.It is inner that the driving mechanism of engine braking can be integrated in the existing valve actuation chain of motor (as valve bridge) by the utility model, and the brake load utilizing stop mechanism and non-return mechanism reduction valve actuation chain (as rocking arm and cam) to bear, add reliability and the durability of engine operation.
Accompanying drawing illustrates:
Fig. 1 is the schematic diagram that an embodiment of compression-release engine braking device in the utility model is in off-position.
Fig. 2 is the schematic diagram that an embodiment of compression-release engine braking device in the utility model is in "ON" position.
Embodiment:
Embodiment:
As depicted in figs. 1 and 2, the embodiment of compression-release engine braking device of the present utility model is in the position of "Off" (oil feeding mechanism oil-break) and "ON" (oil feeding mechanism fuel feeding) respectively.Fig. 1 and Fig. 2 comprises three chief components: conventional (master) valve actuator 200, valve 300(comprise first valve 3001 and a duaspiracle 3002) and compression-release engine braking driving mechanism 100.
Valve actuator 200 comprises cam 230, cam follower wheel 235, push rod 201, rocking arm 210 and valve bridge 400.Valve actuator 200 and valve 300 are combined and can be described as valve actuation chain.Usually in one end (near valve bridge 400 or near cam 230) of rocking arm 210 with valve clearance controlling mechanism.Valve clearance controlling mechanism in the present embodiment is made up of the valve clearance adjusting screw 110 in the rocking arm 210 being arranged on push rod 201 side, is fixed by lock nut 105.Be arranged on pitman arm shaft 205 rocking arm 210 swing type.
The valve 300 of motor comprises the first valve 3001 and duaspiracle 3002, they are called for short valve spring 310 by valve spring 3101 and valve spring 3102(respectively) on the valve seat 320 of overhead in engine cylinder-body 500, stop the flowing of gas between engine cylinder and outlet pipe 600.Valve actuator 200, by the mechanical motion of cam 230, passes to the first valve 3001 and duaspiracle 3002 by valve bridge 400, makes it periodically open and close, and produces conventional (master) valve motion.
The engine cam of the present embodiment is the integrated of engine braking cam and motor routine (master) cam, the conventional boss 220 of motor that integrated cam 230 comprises a compression release braking boss 233 and raised.
Engine braking driving mechanism 100 comprises casing, stop mechanism, oil feeding mechanism, non-return mechanism and brake clearance compensation mechanism.Casing in the present embodiment adopts the valve bridge 400 of motor.The mediad upper shed of valve bridge 400 is provided with a master piston bore 415, and one end (left end here) of valve bridge 400 is provided with a slave piston bore 190 under shed.Master piston bore 415 is communicated with by hydraulic channel 412 with slave piston bore 190.Main piston 162 and sub-piston 160 is provided with respectively slidably in master piston bore 415 and in slave piston bore 190.The outer end (upper end) of main piston 162 is middle containing oil supply gallery with 114(by link 113) be connected with the rocking arm 210 of motor, the other end of rocking arm 210 is connected with cam 230 with cam follower wheel 235 by rocker compensating gear 250, push rod 201.The outer end (lower end) of sub-piston 160 is connected with the first valve 3001 producing engine braking.Be connected with the duaspiracle 3002 of motor below the other end of valve bridge 400.Be provided with an oilhole be in communication with the outside 197 in valve bridge 400 at the bottom of slave piston bore, on the upside of the valve bridge at oilhole 197 place, be provided with a stop mechanism 125.The casing 1251 of stop mechanism 125 is fixing on the engine.Stop mechanism 125 comprises adjustable link 1102 and link 1142 and fastening piece 1052.When cam 230 is in basic circle 225 position, link 1142 is positioned at the outlet (Fig. 1) the valve bridge 400 above slave piston bore 190 also being closed oilhole 197.
Master piston bore 415 limit in valve bridge 400 is also provided with locating stud 142, main piston 162 is provided with restraining groove 137, form piston limit mechanism, the maximum stroke of restriction main piston 162.Similar piston limit mechanism also may be used for sub-piston 160.
The oil feeding mechanism of engine braking driving mechanism 100 comprises braking for solenoid (not shown), oil supply gallery and unidirectional delivery valve 172.Oil supply gallery is a lot, comprises the groove in the axial passage 211 in pitman arm shaft 205, radial passage 212, rocking arm 210 or the passage 115 etc. in breach 213, passage 214 and link 113.Unidirectional delivery valve 172 is arranged in oil supply gallery or is arranged between oil supply gallery and master piston bore 415.
The rocker compensating gear 250 of engine braking driving mechanism 100 comprises to be prevented flying off spring 198 and resembling foot pad 116.The one end resembling foot pad 116 is concave spherical surface and adjacent with the pressure ball face of the adjusting screw 110 be fixed tightly on rocking arm 210 (forming brake clearance 132), resemble the foot pad the other end of 116 to be connected with the push rod 210 of motor, anti-one end flying off spring 198 is placed on rocking arm 210, and the anti-the other end flying off spring 198 is placed in and resembles on foot pad 116.The preloading spring 198 of rocker compensating gear 250 also can use different mounting types, be arranged on different places, such as between main piston 162 and valve bridge 400 etc.Preloading spring 198 keeps the gap 132 or 130 generated in valve actuation chain inside with extended position (Fig. 2) by the retracted position of main piston 162 in master piston bore 415 (Fig. 1), eliminates not following and impacting of valve actuation chain inside.
The non-return mechanism of engine braking driving mechanism 100 comprises safety check 173.Safety check 173 is arranged on the outlet 174 of hydraulic channel 176 in sub-piston 160, is in normally closed state (outlet 174 being closed).The present embodiment is also provided with check spring 178, is biased in by safety check 173 in the outlet 174 of hydraulic channel 176 in sub-piston 160, namely safety check 173 is kept normally closed.Safety check 173 can be arranged on any position between master piston bore 415 and slave piston bore 190, and according to the position at safety check 173 place, check spring 178 can not wanted yet.As its name suggests, the effect of safety check 173 is exactly stop the fluid in slave piston bore 190 back to flow to master piston bore 415, or stops hydrodynamic pressure above sub-piston 160 by hydraulic channel 176 and 412 back transfer to main piston 162 and the rocking arm 210 be connected with main piston and brake cam 230.
When engine braking is desired, braking is opened for solenoid (not shown), by the oil supply gallery of oil feeding mechanism, to driving mechanism 100 fuel feeding of engine braking.The anti-active force flying off spring 198 in oil pressure counter rocker compensating gear 250, make main piston 162 in the master piston bore 415 of valve bridge 400 from retracted position as shown in Figure 1 outwards (upwards) move on to extended position as shown in Figure 2, be filled with hydraulic fluid (machine oil) in gap 130 at the bottom of the hole of main piston 162 and master piston bore 415 between (namely valve bridge 400), form hydraulic connecting.Space 132 in the rocker compensating gear 250 of Fig. 1 is eliminated.
In the latter half of engine compression strokes, when engine braking boss (the compression release braking boss) 233 of cam 230 is from interior basic circle 225 toward when rising; the main piston 162 in rocking arm 210 actuating valve bridge 400 down shifts to the retracted position of master piston bore bottom surface from the extended position of Fig. 2; stop backflow by the hydraulic channel 412 and 176 between master piston bore 415 and slave piston bore 190 and safety check 173(; but allow flow forward), moving downward of main piston 162 passes to sub-piston 160 by hydraulic fluid (machine oil).Be positioned at the stop mechanism 125 on the valve bridge 400 above slave piston bore 190, make valve bridge 400 because the oil pressure in slave piston bore 190 increases and is upwards adjacent to stop mechanism 125(link 1142) and block oilhole 197, but can not move upward (valve bridge 400 keeps relative static conditions).Sub-piston 160 in the slave piston bore 190 of valve bridge 400 can only outwards (downwards) stretch out, and opens the first valve 3001 be positioned at below sub-piston 160, produces the valve motion of engine braking.
Produce in the process of compression release braking at above-mentioned the first valve 3001 of opening, the power above sub-piston 162 that acts on increases gradually with the hydrodynamic pressure on its surface, before close to compression top center, reach maximum.According to the feature that above-mentioned brake load (slave piston bore fluid pressure) increases gradually, the peak of engine compresses release braking boss 233 can be arranged on the previous predetermined phase place (predetermined phase of the peak of braking boss 233 is determined by the bearing capacity of motor) of compression top center.When cam 230 turns over the peak of compression release braking boss 233, safety check 173 cuts out the outlet 174 of hydraulic channel 176 in sub-piston 160, stops the hydrodynamic pressure in slave piston bore 190 back to pass to main piston 162 by hydraulic channel 176 and 412 and the rocking arm 210 that is connected with main piston 162 and cam 230.Like this, braking valve 3001 above increasing brake load can not pass to valve actuator 200(as cam 230), but by the hydrodynamic pressure in sub-piston 162, slave piston bore 190 and the valve bridge 400 at slave piston bore 190 end, pass to fixing stop mechanism 125 on the engine.
When cam 230 enters top (higher than the engine braking boss 233) of the conventional boss 220 of the motor raised, main piston 162 is oppressed at the bottom of master piston bore, and actuating valve bridge 400 moves downward.Valve bridge 400 and the stop mechanism 125(and the link 1142 that are located thereon face) be separated, the oilhole 197 communicated with slave piston bore 190 in valve bridge 400 opens emptying, sub-piston 160 upwards moves on to retracted position from the extended position in the slave piston bore 190 of valve bridge 400, the lift of the first valve 3001 that the conventional boss 220 of motor raised is generated is reset, and produces the shut-in time almost identical with duaspiracle 3002.
When not needing engine braking, closing braking for solenoid (not shown), stopping to engine braking driving mechanism 100 fuel feeding.Cam 230 enter integrated after motor routine (master) boss 220 raised top (higher than braking boss 233) time, main piston 162 is oppressed at the bottom of master piston bore, and actuating valve bridge 400 moves downward.Valve bridge 400 and the stop mechanism 125(and the link 1142 that are located thereon face) be separated, the oilhole 197 communicated with slave piston bore 190 in valve bridge 400 opens emptying, and sub-piston 160 upwards moves on to retracted position from extended position in the slave piston bore 190 of valve bridge 400.The Movement transmit at conventional for the motor raised boss 220 top is given two valves 3001 and 3002 by valve bridge 400, produces conventional valve motion.Enter the process of getting back to interior basic circle 225 bottom it at cam 230 from the top of the conventional boss 220 of the motor raised, sub-piston 160 remains on the retracted position (the upwards active force due to valve spring 3101) shown in Fig. 1, main piston 162 remains on retracted position shown in Fig. 1 (due to the active force flying off spring 198 anti-in rocker compensating gear 250), and valve actuation chain inside (adjusting screw 110 and resemble between foot pad 116) forms a space 132.Due to this brake clearance 132, the motion of engine braking boss (as compression release braking boss 233) will be skipped, valve 300 can not be passed to, the Movement transmit at conventional boss 220 top of the motor only raised is to valve 300, produce routine (master) valve motion of motor, the running of engine braking is removed.
Above-mentioned explanation discloses a kind of new compression-release engine braking device and method.Above-mentioned mode of execution, 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, compression-release engine braking device here, not only may be used for push rod engine, is also applicable to overhead camshaft type engine; Not only may be used for driving exhaust valve, be also applicable to drive intake valve; An engine valve can be opened during braking, also can open two engine valves.Further, delivery valve 172 can adopt different forms, as ball valve, column valve and dish valve etc.Delivery valve 172 also can be placed in different positions, is such as placed in oil supply gallery (oil duct 214 as in rocking arm 210).In addition, main piston 162 and sub-piston 160 can adopt different forms, as " H " type and T-shape etc.Further, preloading spring 198 can have different forms and be arranged on different places, such as between main piston 162 and valve bridge 400.
In addition, the casing of compression-release engine braking device here, except the valve bridge of motor, can also be the engine components such as rocking arm, also can be additional, fixing braking casing on the engine.
Further, compression-release here braking boss can have different molded line, and the peak of its lift is before the compression top center of motor, and the lift of peak and phase place can be different according to the performance of different motor and design.Such as compression-release braking boss can keep this top lift arrived at its peak before the compression top center of motor after, level and smooth is transitioned into the conventional boss of the motor raised.Therefore, scope of the present utility model should not limited by above-mentioned concrete illustration, but is decided by claim.
Claims (4)
1. a compression-release engine braking device, comprise a casing, stop mechanism, oil feeding mechanism, non-return mechanism, the cam of motor and the valve of motor, it is characterized in that: in described casing, be provided with a master piston bore and a slave piston bore, the hydraulic channel of connection is provided with between described master piston bore and slave piston bore, be provided with a main piston master piston bore inner sliding type, be provided with a sub-piston slave piston bore inner sliding type, driving mechanism is set between the outer end of main piston and described cam, the outer end of sub-piston is connected with described valve, an oilhole is provided with in casing at the bottom of slave piston bore, described stop mechanism is fixed on the engine and adjacent with casing in the outlet port of described oilhole, described oil feeding mechanism comprises oil supply gallery and unidirectional delivery valve, described unidirectional delivery valve is arranged in oil supply gallery or is arranged between oil supply gallery and master piston bore, described non-return mechanism comprises safety check, described safety check to be arranged between master piston bore and slave piston bore and to keep normal off status, described engine cam comprises compression-release braking boss, described compression release braking boss is started from scratch in the latter half of engine compression strokes and is risen and reached top lift before the top dead center of engine compression strokes.
2. compression-release engine braking device as claimed in claim 1, it is characterized in that: described engine cam also comprises the conventional boss of the motor raised, it is contour that the lower part of the conventional boss of the motor raised and compression-release brake boss, the upper part of the conventional boss of the motor raised is substantially identical with the conventional boss of motor, described compression release braking boss keeps described top lift reached top lift before the top dead center of engine compression strokes after, until transition enters the upper part of the conventional boss of the motor raised smoothly.
3. compression-release engine braking device as claimed in claim 1, it is characterized in that: described casing comprises the valve bridge of motor, described valve comprises the first valve and the duaspiracle of motor, described master piston bore is arranged on the middle part of valve bridge and upward opening, described slave piston bore be arranged on valve bridge one end and under shed, the outer end of the main piston in master piston bore is connected with one end of the rocking arm of motor, the other end of rocking arm is connected with cam, the outer end of the sub-piston in slave piston bore is connected with the first described valve, the downside of the other end of valve bridge is connected with described duaspiracle, described oilhole is provided with in valve bridge at the bottom of slave piston bore, described stop mechanism is fixed on the engine and adjacent with valve bridge in the outlet port of described oilhole, hydraulic channel is provided with in described sub-piston, described safety check is arranged on the outlet port of hydraulic channel in sub-piston.
4. compression-release engine braking device as claimed in claim 1, it is characterized in that: also comprise brake clearance compensation mechanism, described brake clearance compensation mechanism comprises to be prevented flying off spring and resembling sufficient pad, the one end resembling foot pad is concave spherical surface and is connected with the rocking arm of motor by the pressure ball face of adjustable clearance, the other end resembling foot pad is connected with the push rod of motor, anti-one end flying off spring is placed on rocking arm, and the anti-the other end flying off spring is placed in and resembles on foot pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520856103.8U CN205089460U (en) | 2015-10-29 | 2015-10-29 | Compression release type engine brake device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520856103.8U CN205089460U (en) | 2015-10-29 | 2015-10-29 | Compression release type engine brake device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205089460U true CN205089460U (en) | 2016-03-16 |
Family
ID=55480155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520856103.8U Active CN205089460U (en) | 2015-10-29 | 2015-10-29 | Compression release type engine brake device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205089460U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106089348A (en) * | 2016-08-23 | 2016-11-09 | 潍柴动力股份有限公司 | A kind of air valve bridge and include the electromotor of this air valve bridge |
| CN110173314A (en) * | 2019-05-15 | 2019-08-27 | 浙江大学 | A kind of air valve bridge and its exhaust brake method of achievable compression-release type engine braking |
| CN110182200A (en) * | 2019-07-24 | 2019-08-30 | 潍柴动力股份有限公司 | A kind of brake control method for series connection type hybrid power system |
| CN110735724A (en) * | 2018-07-18 | 2020-01-31 | 上海尤顺汽车部件有限公司 | Method and system for braking compound engine |
-
2015
- 2015-10-29 CN CN201520856103.8U patent/CN205089460U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106089348A (en) * | 2016-08-23 | 2016-11-09 | 潍柴动力股份有限公司 | A kind of air valve bridge and include the electromotor of this air valve bridge |
| CN106089348B (en) * | 2016-08-23 | 2018-10-16 | 潍柴动力股份有限公司 | A kind of air valve bridge and the engine including the air valve bridge |
| US11125120B2 (en) | 2016-08-23 | 2021-09-21 | Weichai Power Co., Ltd. | Valve bridge and engine comprising the valve bridge |
| CN110735724A (en) * | 2018-07-18 | 2020-01-31 | 上海尤顺汽车部件有限公司 | Method and system for braking compound engine |
| CN110173314A (en) * | 2019-05-15 | 2019-08-27 | 浙江大学 | A kind of air valve bridge and its exhaust brake method of achievable compression-release type engine braking |
| CN110173314B (en) * | 2019-05-15 | 2023-07-18 | 浙江大学 | Valve bridge capable of realizing compression release type engine braking and exhaust braking method thereof |
| CN110182200A (en) * | 2019-07-24 | 2019-08-30 | 潍柴动力股份有限公司 | A kind of brake control method for series connection type hybrid power system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102102559B (en) | Compression releasing engine braking method and device | |
| CN102787919B (en) | Method and device for braking reset rocking arm | |
| CN102787880B (en) | Method and device for manufacturing rocking arm with main piston and auxiliary piston | |
| US9163566B2 (en) | Valve actuation mechanism and automotive vehicle comprising such a valve actuation mechanism | |
| CN102840005B (en) | A kind of solid chain type composite rocker arm brake device | |
| JP5350235B2 (en) | Variable valve actuator and engine brake | |
| CN101392667B (en) | Engine braking apparatus and method using single valve and bridge of valve | |
| CN202090976U (en) | Rocker arm brake apparatus with major and minor pistons | |
| CN106150589A (en) | A kind of single valve compression-release valve bridge brake unit | |
| EP2677127A1 (en) | Method and apparatus for resetting valve lift for use in engine brake | |
| CN205089460U (en) | Compression release type engine brake device | |
| CN101338691B (en) | Apparatus and method for engine braking | |
| CN202140128U (en) | Integrated air-leakage type engine brake device | |
| CN102635418A (en) | Method and device for resetting valve lift for engine brake | |
| CN106640257B (en) | Load controllable engine braking apparatus and engine braking methods | |
| CN101769186A (en) | Engine braking device with double oil pressure control valves and method thereof | |
| CN102650224A (en) | Braking method and device of integrated exhaust type engine | |
| CN202017536U (en) | Device for braking engine by using valve bridge | |
| CN202017535U (en) | Compression-release engine braking device | |
| CN112177703A (en) | Self-resetting single-valve main and auxiliary piston hydraulic driving device and method for push rod engine | |
| CN202090975U (en) | Engine brake device positioned by valve rod of air valve | |
| CN102733884B (en) | A kind of engine braking apparatus of integrated form | |
| CN112912596B (en) | Lost motion variable valve actuation system and method | |
| CN202090977U (en) | Reset type rocker braking device | |
| CN202194698U (en) | Fixed chain type composite rocker arm brake device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201415 No. 1133 Juting Road, Fengxian District, Shanghai Patentee after: Shanghai Youshun Automobile Technology Co.,Ltd. Address before: 201415 No. 1133 Juting Road, Fengxian District, Shanghai Patentee before: Shanghai Universoon Autoparts Co.,Ltd. |