CN102003242A - Improved engine brake device - Google Patents
Improved engine brake device Download PDFInfo
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- CN102003242A CN102003242A CN 200910194871 CN200910194871A CN102003242A CN 102003242 A CN102003242 A CN 102003242A CN 200910194871 CN200910194871 CN 200910194871 CN 200910194871 A CN200910194871 A CN 200910194871A CN 102003242 A CN102003242 A CN 102003242A
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Abstract
The invention relates to an engine brake device which comprises an exhaust valve control mechanism. The exhaust valve control mechanism comprises a driving force input cam, a cam driven wheel, a push rod, a rocker arm and a rocker arm shaft, wherein one end of the push rod is connected with one end of the rocker arm, the cam driven wheel is arranged on the other end of the push rod, and the driving force input cam is arranged outside the cam driven wheel; the other end of the rocker arm is provided with a horizontal guide piston, a driving piston and a vertical brake plunger piston, two connecting rods are arranged in the guide piston, the convex spherical surface of the upper end of the upper connecting rod is matched with the concave spherical surface of the rocker arm, the convex spherical surface of the lower end of the lower connecting rod is matched with the convex spherical surface of the brake plunger piston, and an exhaust valve rod connecting piece is arranged below the brake plunger piston. The driving force input cam periodically transmits engine power to the rocker arm, the gap between the rocker arm and the exhaust valve rod connecting piece is controlled by using a solenoid valve, the switching between the brake working state and the normal working state is realized, the size and the weight of the brake are reduced, and high oil pressure and leakage, deformation and load fluctuation caused by high oil pressure do not occur.
Description
Technical field:
The present invention relates to mechanical field, relate in particular to the braking device of motor, particularly a kind of improved engine braking apparatus.
Background technique:
In the prior art, internal-combustion engine is known altogether as the method behaviour of brake tool, only needed motor temporarily is converted to compressor.Fuel oil is cut off in this conversion, when the engine piston compression stroke finishes or when finishing, open outlet 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.
A precedent of engine brake is that the U.S. Patent number 3220392 that is provided by comings (Cummins) discloses, according to the engine 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 engine brake is installed, between cylinder and valve gap, to add packing ring, therefore, increased height, weight and the cost of motor extraly.Above-mentioned these problems are because engine braking system is used as an annex of motor, rather than of motor constituent element or integrated part caused.
Engine brake of the prior art is delivered to the outlet valve that will open through oil hydraulic circuit with the machinery input.Be usually included in reciprocating main piston in the master piston bore on the oil hydraulic circuit, this to-and-fro motion comes from the machinery input of motor, such as the shaking of oil sprayer rocking arm, the hydraulic fluid that moves through of main piston is delivered to sub-piston on the oil hydraulic circuit, make its to-and-fro motion in slave piston bore, sub-piston acts on the outlet valve directly or indirectly, produces the valve actuation of engine braking running.
Therefore, above-mentionedly there is another shortcoming by hydraulically powered conventional engines break, be the contractibility or the distortion of hydraulic system, this flexibility with liquid is relevant, a large amount of compressions that high flexibility causes brake valve to rise reduce, valve rises reduces the increase that causes valve to carry, and the increase that valve carries causes higher flexibility, causes a kind of vicious circle.In addition, the valve liter that is caused by hydraulic pressure distortion reduces to increase along with the increase of engine speed, and to rise trend on the contrary with the desired brake valve of engine braking performance.In order to reduce flexible hydraulic, must use large diameter hydraulic piston, increase volume and weight.And oily stream need make enlarged bore piston stretch out for a long time or withdraw, and causes that braking system inertia is big, reaction is slow.
Summary of the invention:
The object of the present invention is to provide a kind of improved engine braking apparatus, the overhead mode that described this improved engine braking apparatus will solve engine braking system in the prior art has increased the height of motor and the technical problem of manufacture cost, will solve the technical problem that braking system inertia is big, reaction is slow that hydraulically powered engine brake exists simultaneously.
This improved engine braking apparatus of the present invention is made of an outlet valve control mechanism, wherein, described outlet valve control mechanism is by the driving force input cam; rocking arm and pitman arm shaft constitute; described driving force input cam mechanism is arranged on an end of rocking arm; rocking arm is arranged on the pitman arm shaft; the other end of rocking arm is provided with a vertical blind hole and a horizontal hole; described vertical blind hole upper end is intersected with described horizontal hole and is three-port structure; be provided with spool in the described vertical blind hole; described spool upper end is provided with another vertical blind hole; described another vertical blind hole outlet port is provided with and is tilted to the outer transition conical surface that has; be provided with guide piston in the described horizontal hole; described guide piston the inner is provided with along its axial piston hole; be provided with driven plunger in the piston hole; be provided with liquid sealing between described driven plunger outer wall and the described piston hole and be connected; be provided with along its diametric grooving in the middle part of the described guide piston; be provided with connecting rod and lower link between described vertical blind hole bottom surface and another axial blind hole bottom surface, last connecting rod and lower link pass described grooving.
Further, be provided with the fluid passage in the described pitman arm shaft vertically, be provided with radial hole along radial direction, be provided with fluid passage in the described rocking arm, an end of described fluid passage is communicated with described radial hole, and the other end is communicated with described horizontal hole.
Further, described vertical blind hole bottom surface is provided with concave spherical surface, the vertical blind hole of another of described spool bottom surface is provided with another concave spherical surface, described upper end of going up connecting rod is protruding sphere, described lower end of going up connecting rod is protruding another protruding sphere, the upper end of described lower link is the 3rd concave spherical surface, the lower end of described lower link is the 3rd protruding sphere, the described protruding sphere of going up connecting rod cooperates with the concave spherical surface of described vertical blind hole upper end, the 3rd protruding sphere of described lower link cooperates with another concave spherical surface of described spool upper end, and the 3rd concave spherical surface of described lower link upper end cooperates the formation revolute pair with described another protruding sphere of going up the connecting rod lower end.
Further, described spool lower end is fixed with an end of spring, the described spring the other end by screw on described rocking arm.
Further, be fixed with a spring seat that is ring by snap ring, be provided with another spring between described guide piston outer end and the described spring seat in described horizontal hole outer end.
Further, described horizontal hole outer end and described rocking arm end face, described vertical blind hole lower end flushes with described rocking arm lower end.
Further, the described guide piston the other end is provided with discharge orifice, described discharge orifice and described grooving spatial communication.
Further, described driving force input cam within it basic circle be provided with a big convex portion and at least one small embossment part.
Further, described fluid passage is communicated with oil-feed port and oil drain out in the three-way magnetic valve.
Working principle of the present invention is: the driving force input cam is connected with the power take-off mechanism of motor, and the driving force input cam makes rocker arms roll under the motivational drive of motor.The outlet valve valve stem coupling member is arranged on the control valve rod of engine exhaust valve.Need motor when normal working is converted to engine braking, send actuating signal to three-way magnetic valve by a controller.Three-way magnetic valve is by open-minded by the electric current of its positive terminal and negative terminal, the spool of solenoid valve glides, open oil-feed port, machine oil is by the brake fluid networking, comprise otch and hydraulic channel in pitman arm shaft fluid passage and radial hole, the rocking arm, flow to braking drive organ, oil pressure overcomes the load of guide piston right-hand member spring, guide piston is pushed away to the right in horizontal hole, rest on spring seat and the snap ring.Driven plunger continues to move to right, and upper and lower linkage mechanism is pushed away directly, makes spool reach operating position.One discharge orifice is arranged, to avoid producing any oil pressure in the vertical hole in the guide piston.When not needing engine braking, the engine braking control mechanism cuts out draining, and driven plunger and guide piston are not subjected to oil pressure, to moving to left, rests on the left side of horizontal hole under the effect of guide piston right-hand member spring.Spool is got back to off position upwards moving under the effect of brake spring in vertical hole, just separate with the motor normal operation position of " pass ".
The present invention and prior art compare, and its effect is actively with tangible.The present invention utilizes cam that the power of motor periodically is delivered to rocking arm, utilize the exhaust action of rocking arm operations platoon air valve, utilize the gap between electromagnetic valve rocking arm and the outlet valve drive end, realize the switching of braking and motor proper functioning two states and keep, can be integrated with motor, thereby reduce the volume and weight of engine brake, need not adopt the hydraulic braking control valve, reduced cost, reduced reaction time, the leakage that does not have high oil pressure and high oil pressure to cause, distortion and load fluctuation, brake valve rises and is not subjected to the oil temperature, the influence of oil pressure and air content, brake valve rises can obtain littler value, reduces the requirement to engine piston and valve clearance.
Description of drawings:
Fig. 1 is the structural representation (spool that do not draw among Fig. 1, driven plunger and guide piston part) of a kind of improved engine braking apparatus of the present invention.
Fig. 2 is the schematic representation that the braking drive organ in a kind of improved engine braking apparatus of the present invention is in the off-position.
Fig. 3 is the schematic representation that the braking drive organ in a kind of improved engine braking apparatus of the present invention is in " opening " position.
Fig. 4 is the schematic representation of the working state of fluid passage in a kind of improved engine braking apparatus of the present invention and three-way magnetic valve.
Fig. 5 is the schematic representation of another working state of fluid passage in a kind of improved engine braking apparatus of the present invention and three-way magnetic valve.
Embodiment:
Embodiment 1:
Such as Fig. 1; Fig. 2; Fig. 3; Fig. 4 and shown in Figure 5; A kind of improved engine braking apparatus 100 of the present invention; Consisted of by an air bleeding valve controlling organization 200; Wherein, Described air bleeding valve controlling organization 200 is by driving force input cam 230; Cam follower wheel 235; Push rod 201; Rocking arm 210 and rocker arm shaft 205 consist of; The middle part of described rocking arm 210 is arranged on the rocker arm shaft 205; One end of described push rod 201 is connected with an end of rocking arm 210; Described cam follower wheel 235 is arranged in the other end of push rod 201; Described driving force input cam 230 is arranged on outside the cam follower wheel 235; The excircle of the rotation round of protuberance and cam follower wheel 235 intersects in the driving force input cam 230; Rocking arm 210 arranged outside have a biasing back-moving spring 198; Be provided with fluid passage 214 in the described rocking arm 210; Be provided with vertically fluid passage 211 in the rocker arm shaft 205; Be provided with a radial hole 212 along a radius; Described radial hole 212 is communicated with 214 with described fluid passage; Be provided with an otch 213 in the rocking arm 210; Described otch 213 is communicated with radial hole 212 and described fluid passage 214 1 ends respectively; The other end of rocking arm 210 is provided with a vertical blind hole 190 and a lateral aperture 260; Described fluid passage 214 other ends and described 260 inner connections of lateral aperture; The diameter of described fluid passage 214 is less than described lateral aperture 260 diameters; Described lateral aperture 260 outer ends and described rocking arm 210 end face; Described vertical blind hole 190 lower ends flush with described rocking arm 210 lower ends; Described vertical blind hole 190 upper ends and described lateral aperture 260 intersect and are three-port structure; Described vertical blind hole 190 upper surfaces are higher than described lateral aperture 260; Described vertical blind hole 190 upper surfaces arrange by interior concave spherical surface 122; Be provided with spool 160 in the described vertical blind hole 190; Described spool 160 upper ends are provided with concave spherical surface 128 in another; Be provided with the transition conical surface 126 between the upper surface of described spool 160 and described another interior concave spherical surface 128; Be provided with guide piston 162 in the described lateral aperture 260; Being provided with liquid sealing between described guide piston 162 outer walls and the described lateral aperture 260 is connected; Described guide piston 162 the inners are provided with along its axial piston hole 183; Described piston hole 183 is blind holes; Be provided with driven plunger 164 in the described piston hole 183; Being provided with liquid sealing between described driven plunger 164 outer walls and the described piston hole 183 is connected; Described guide piston 162 middle parts are provided with along its diametric grooving 137; Described grooving 137 is grooves; Be provided with connecting rod 184 and lower link 186 in the described grooving 137; The width of described grooving 137 is greater than the width of described upper connecting rod 184 and lower link 186; The upper end of described upper connecting rod 184 is protruding sphere; The lower end of described upper connecting rod 184 is protruding another protruding sphere; The upper end of described lower link 186 is the 3rd concave spherical surface 125; The lower end of described lower link 186 is the 3rd protruding sphere 124; The protruding sphere of described upper connecting rod 184 cooperates with the concave spherical surface 122 of described vertical blind hole upper end; The 3rd protruding sphere 124 of described lower link 186 cooperates with another concave spherical surface 128 of described spool 160 upper ends; The 3rd concave spherical surface 125 of described lower link 186 upper ends cooperates the formation revolute pair with another protruding sphere of described upper connecting rod 184 lower ends; Described spool 160 lower ends are fixed with an end of spring 177; Described spring 177 other ends are fixed on the described rocking arm 210 by screw 179; Described spool 160 upper surfaces contact with described guide piston 162 lateral surfaces; Be fixed with a spring base 158 that is annular in described lateral aperture 260 outer ends by snap ring 157; Be provided with another spring 156 between described guide piston 162 outer ends and the described spring base 158; Described guide piston 162 inner faces contact with described lateral aperture 260 inner faces 246; It is skewed that upper connecting rod 184 described in Fig. 2 and lower link 186 are "＜"; This moment, this brake control mechanism was in off position; Described upper connecting rod 184 lower ends contact with driven plunger 164 with lower link 186 upper ends, and described driven plunger 164 inner faces contact with described lateral aperture inner face 246.
Further, described guide piston 162 outer ends are provided with another axial blind hole, and described another spring 156 1 ends are arranged in described another axial blind hole, and the other end of described another spring 156 is connected with described spring seat 158.
Further, described guide piston 162 the other ends are provided with discharge orifice 168, and described discharge orifice 168 and described grooving 137 spatial communication, and then is communicated with described vertical hole 190 are in order to avoid the vertical any oil pressure of generations in the hole 190.
Further, be provided with braking valve clearance adjusting screw 1102 between described push rod 201 and the rocking arm 210, described braking valve clearance adjusting screw 1102 is connected with push rod 201, and braking valve clearance adjusting screw 1102 is connected with a nut 1052 after passing an end of rocking arm 210.
Further, described rocking arm 210 the other ends are fixedly connected with contiguous block, are provided with in the described contiguous block to activate gap adjustment screws 110, and described actuating gap adjustment screws 110 rear ends are connected with another nut 105.
Further, described driving force input cam 230 basic circle 225 within it is provided with three convex portions, and one of them convex portion 220 is greater than other two convex portions 232,233.
Further, described fluid passage 211 is communicated with oil-feed port 111 and oil drain out 222 in the three-way magnetic valve 51.
The working procedure of present embodiment is: driving force input cam 230 is connected with the power take-off mechanism (not shown) of motor, and driving force input cam 230 shakes rocking arm 210 under the motivational drive of motor.Outlet valve valve stem coupling member 116 is arranged on the control valve rod 3001 of engine exhaust valve 300.Need motor when normal working is converted to engine braking, send actuating signals to three-way magnetic valve 51 by a controller (not shown).Three-way magnetic valve 51 is by open-minded by the electric current of its positive terminal 55 and negative terminal 57, the spool 58 of solenoid valve glides, open oil-feed port 111, allow in the horizontal hole 260 that hydraulic fluid enters into rocking arm by otch 213 in the fluid passage 211 in the pitman arm shaft 205 and radial hole 212, the rocking arm 210 and hydraulic channel 214, oil pressure overcomes the load of guide piston 162 right-hand member springs 156, guide piston 162 is pushed away to the right in horizontal hole, rest on spring seat 158 and the snap ring 157.Driven plunger 164 continues to move to right, and upper and lower linkage mechanism 184,186 is pushed away directly, makes spool 160 reach as shown in Figure 3 operating position, and this moment, the stroke of spool 160 was 130, and this distance is determined by the axial length of grooving 137.One discharge orifice 168 is arranged, to avoid producing any oil pressure in the vertical hole 190 in the guide piston 162.When not needing engine braking, the engine braking control mechanism cuts out draining, and driven plunger 164 and guide piston 162 are not subjected to oil pressure, to moving to left, rests on the left side 146 of horizontal hole under the effect of guide piston right-hand member spring 156.Spool 160 is got back to off position as shown in Figure 2 upwards moving under the effect of brake spring 177 in vertical hole 190, just separate with the motor normal operation position of " pass ".
In the embodiment shown in fig. 1, also be provided with another outlet valve 300 in the motor, be provided with control valve rod 3002 in this outlet valve 300, the control valve rod is provided with another valve spring 3102, valve spring 3101 and valve spring 3102 are arranged between engine cylinder cover 500 and the valve bridge 400, and valve bridge 400 makes 300 interlocks of two outlet valves.Valve bridge 400 is right against and activates gap adjustment screws 110 belows, when this arrestment mechanism is in "off" state shown in Figure 2, under the effect of big projection 220 on the cam 230; rocking arm 210 swings make and activate gap adjustment screws 110 to pressing down valve bridge 400, realize the normal operating exhaust action of motor.
When this arrestment mechanism is in "open" state shown in Figure 3, because spool 160 stretches out downwards, the gap of spool 160 lower ends and exhasut valve stem link 116 upper ends is eliminated, under kick 232,233 effects of cam 230, spool 160 is depressed exhasut valve stem link 116 earlier, realizes exhaust brake.
Present embodiment is that the present invention will be described, rather than limits it.In fact, those people that are expert at one's trade can show to change places and in scope of the present invention and principle the present invention made amendment and change.For instance, illustrated or certain part of functions described of concrete mechanism can be used for another concrete mechanism, and then obtains a new mechanism.Therefore, the present invention will comprise above-mentioned modification and change, as long as they belong within appended claim or the scope suitable with requirement power.
Claims (8)
1. improved engine braking apparatus, constitute by an outlet valve control mechanism, it is characterized in that: described outlet valve control mechanism is by the driving force input cam; rocking arm and pitman arm shaft constitute; described driving force input cam mechanism is arranged on an end of rocking arm; rocking arm is arranged on the pitman arm shaft; the other end of rocking arm is provided with a vertical blind hole and a horizontal hole; described vertical blind hole upper end is intersected with described horizontal hole and is three-port structure; be provided with spool in the described vertical blind hole; described spool upper end is provided with another vertical blind hole; be provided with guide piston in the described horizontal hole; described guide piston the inner axially is provided with piston hole along it; be provided with driven plunger in the piston hole; be provided with liquid sealing between described driven plunger outer wall and the described piston hole and be connected; be provided with along its axial guiding grooving in the middle part of the described guide piston; be provided with connecting rod and lower link between described vertical blind hole bottom surface and another axial blind hole bottom surface, last connecting rod and lower link pass described guiding grooving.
2. a kind of improved engine braking apparatus as claimed in claim 1, it is characterized in that: be provided with the fluid passage in the described pitman arm shaft vertically, be provided with radial hole along radial direction, be provided with fluid passage in the described rocking arm, one end of described fluid passage is communicated with described radial hole, and the other end is communicated with described horizontal hole.
3. a kind of improved engine braking apparatus as claimed in claim 1, it is characterized in that: described vertical blind hole bottom surface is provided with concave spherical surface, the vertical blind hole of another of described spool bottom surface is provided with another concave spherical surface, described upper end of going up connecting rod is protruding sphere, described lower end of going up connecting rod is protruding another protruding sphere, the upper end of described lower link is the 3rd concave spherical surface, the lower end of described lower link is the 3rd protruding sphere, the described protruding sphere of going up connecting rod cooperates with the concave spherical surface of described vertical blind hole upper end, the 3rd protruding sphere of described lower link cooperates with another concave spherical surface of described spool upper end, and the 3rd concave spherical surface of described lower link upper end cooperates the formation revolute pair with described another protruding sphere of going up the connecting rod lower end.
4. a kind of improved engine braking apparatus as claimed in claim 1 is characterized in that: described spool lower end is fixed with an end of spring, the described spring the other end by screw on described rocking arm.
5. a kind of improved engine braking apparatus as claimed in claim 1, it is characterized in that: be fixed with a spring seat that is ring in described horizontal hole outer end by snap ring, be provided with another spring between described guide piston outer end and the described spring seat.
6. a kind of improved engine braking apparatus as claimed in claim 1 is characterized in that: the described guide piston the other end is provided with discharge orifice, described discharge orifice and described grooving spatial communication.
7. a kind of improved engine braking apparatus as claimed in claim 1 is characterized in that: described driving force input cam basic circle within it is provided with a big convex portion and at least one small embossment part.
8. a kind of improved engine braking apparatus as claimed in claim 1 is characterized in that: described fluid passage is communicated with oil-feed port and oil drain out in the three-way magnetic valve.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910194871 CN102003242B (en) | 2009-08-31 | 2009-08-31 | Improved engine brake device |
| PCT/US2009/069622 WO2010078280A2 (en) | 2009-01-05 | 2009-12-28 | Engine braking devices and methods |
| BRPI0922516-1A BRPI0922516B1 (en) | 2009-01-05 | 2009-12-28 | APPARATUS TO CHANGE AN INTERNAL COMBUSTION ENGINE FROM A NORMAL ENGINE OPERATION FOR AN ENGINE BRAKING OPERATION AND METHOD FOR CONVERTING AN INTERNAL COMBUSTION ENGINE FROM A NORMAL ENGINE OPERATION TO AN ENGINE BRAKING OPERATION |
| KR1020117018023A KR101290440B1 (en) | 2009-01-05 | 2009-12-28 | Engine braking devices and methods |
| RU2011132887/06A RU2479735C1 (en) | 2009-01-05 | 2009-12-28 | Device and methods for overrunning |
| EP09837091.9A EP2384396B1 (en) | 2009-01-05 | 2009-12-28 | Engine braking devices and methods |
| EP11006451.6A EP2444602B1 (en) | 2009-01-05 | 2009-12-28 | Engine braking devices and methods |
| EP11006452.4A EP2439381B1 (en) | 2009-01-05 | 2009-12-28 | Engine braking devices and methods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910194871 CN102003242B (en) | 2009-08-31 | 2009-08-31 | Improved engine brake device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102003242A true CN102003242A (en) | 2011-04-06 |
| CN102003242B CN102003242B (en) | 2012-12-19 |
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ID=43810904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910194871 Active CN102003242B (en) | 2009-01-05 | 2009-08-31 | Improved engine brake device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102003242B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2536927A (en) * | 2015-03-31 | 2016-10-05 | Eaton Srl | Self-retracting hydraulic engine brake system |
| WO2021032136A1 (en) * | 2019-08-19 | 2021-02-25 | Shanghai Universoon Autoparts Co., Ltd. | Engine valve actuating apparatus |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4209775A1 (en) * | 1992-03-26 | 1993-09-30 | Man Nutzfahrzeuge Ag | Device for controlling an exhaust valve in engine braking mode |
| JP5094732B2 (en) * | 2005-12-28 | 2012-12-12 | ジェイコブス ビークル システムズ、インコーポレイテッド | Partial cycle bleeder type braking method and system |
| CN101392667B (en) * | 2008-10-30 | 2013-02-27 | 杨柳 | Engine braking apparatus and method using single valve and bridge of valve |
| CN201513213U (en) * | 2009-08-31 | 2010-06-23 | 上海尤顺汽车部件有限公司 | Modified engine brake device |
-
2009
- 2009-08-31 CN CN 200910194871 patent/CN102003242B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2536927A (en) * | 2015-03-31 | 2016-10-05 | Eaton Srl | Self-retracting hydraulic engine brake system |
| US10260386B2 (en) | 2015-03-31 | 2019-04-16 | Eaton Intelligent Power Limited | Self-retracting hydraulic engine brake system |
| GB2536927B (en) * | 2015-03-31 | 2020-08-26 | Eaton Intelligent Power Ltd | Self-retracting hydraulic engine brake system |
| WO2021032136A1 (en) * | 2019-08-19 | 2021-02-25 | Shanghai Universoon Autoparts Co., Ltd. | Engine valve actuating apparatus |
| US11739667B2 (en) | 2019-08-19 | 2023-08-29 | Shanghai Universoon Autotech Co., Ltd. | Engine valve actuating apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102003242B (en) | 2012-12-19 |
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Address after: Fengxian District Shanghai Fengcheng town in 201411 Road No. 353 Patentee after: Shanghai Youshun Automobile Technology Co.,Ltd. Address before: Fengxian District Shanghai Fengcheng town in 201411 Road No. 353 Patentee before: Shanghai Universoon Autoparts Co.,Ltd. |
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