CN110566310A - compression release type in-cylinder brake device for engine - Google Patents
compression release type in-cylinder brake device for engine Download PDFInfo
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- CN110566310A CN110566310A CN201910996870.1A CN201910996870A CN110566310A CN 110566310 A CN110566310 A CN 110566310A CN 201910996870 A CN201910996870 A CN 201910996870A CN 110566310 A CN110566310 A CN 110566310A
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- cylinder brake
- cam
- compression
- engine
- transmission shaft
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- 230000006835 compression Effects 0.000 title claims abstract description 46
- 238000007906 compression Methods 0.000 title claims abstract description 46
- 230000005540 biological transmission Effects 0.000 claims abstract description 107
- 238000000034 method Methods 0.000 abstract description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- 241000587161 Gomphocarpus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/06—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for braking
- F01L13/065—Compression release engine retarders of the "Jacobs Manufacturing" type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0242—Variable control of the exhaust valves only
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/04—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation using engine as brake
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
the invention discloses a compression release type engine in-cylinder brake device, comprising: the braking cam shaft in the cylinder can rotate, and braking cams which correspond to the positions and the number of the cylinders of the engine one by one are arranged on the braking cam shaft in the cylinder; the cam shaft sleeve is sleeved outside the in-cylinder brake cam shaft and can rotate relative to the in-cylinder brake cam shaft, a shaft sleeve through hole is formed in the position, corresponding to the brake cam, of the cam shaft sleeve, and the positions and the number of the shaft sleeve through holes correspond to those of exhaust valve rocker arms of the engine one to one; the transmission shaft mechanism is arranged in each shaft sleeve through hole, and a transmission shaft of the transmission shaft mechanism is slidably arranged in each shaft sleeve through hole; the compression release type engine in-cylinder brake device disclosed by the invention only works in an in-cylinder brake mode, when the engine is in a normal working mode, the in-cylinder brake device is in an idle state, and in the running process of the engine, the working time of the in-cylinder brake device is short, so that the reliability of the device is greatly improved, and the service life is long.
Description
Technical Field
The invention relates to the technical field of engines, in particular to a compression release type in-cylinder brake device of an engine.
background
In the normal operation process of the engine, the engine completes four working cycles of air intake, compression, work application and exhaust every time the camshaft rotates 360 degrees. At the end of the compression stroke, fuel is injected into the cylinder for combustion, and work is applied to the outside in the subsequent expansion stroke.
the brake in the engine cylinder is a form of auxiliary brake of the whole vehicle, and the brake in the engine cylinder contributes to improving the brake capacity of the whole vehicle and reducing the brake load of the main brake of the whole vehicle. When the engine is braked in the cylinder of the engine, the exhaust valve is opened for a small lift range under the driving of the braking device in the cylinder of the engine when the compression stroke of the engine is close to the top dead center, the compressed high-pressure gas in the cylinder is rapidly released, the pressure in the cylinder is rapidly reduced, and the energy of the power stroke is reduced, so that the engine does not work outwards basically in the next power stroke, the engine is decelerated, and the purpose of braking in the cylinder of the engine is realized.
The Chinese patent with the publication number of CN201241740Y and the name of 'an integrated brake device for rocker arm of four-stroke internal combustion engine' discloses an in-cylinder brake device for an engine, wherein two brake bulges are arranged on an exhaust cam and used for increasing the air inlet amount of an intake valve before the end of an intake stroke and opening an exhaust valve to release pressure before the end of a compression stroke to realize in-cylinder braking of the engine, and in order to offset the valve lift caused by the brake bulges when the engine normally runs, a clearance compensation mechanism controlled by hydraulic pressure is required to be arranged on the rocker arm. Because the normal operating state accounts for the vast majority of the operating state of the whole engine, the clearance compensation mechanism is in the working state in the vast majority of the operating time of the engine, higher requirements on reliability and the like are provided, and the structure is more complex.
Disclosure of Invention
In view of the above, the technical problems to be solved by the present invention are: provided is a compression-release engine in-cylinder brake device which operates only in an in-cylinder brake mode, and which is greatly improved in reliability.
In order to solve the technical problems, the technical scheme of the invention is as follows: a compression-release in-cylinder brake apparatus for an engine, comprising:
The cylinder inner braking cam shaft is rotatable and is provided with braking cams, and the positions and the number of the braking cams correspond to the positions and the number of air cylinders of the engine one by one;
The cam shaft sleeve is sleeved outside the in-cylinder brake cam shaft and can rotate relative to the in-cylinder brake cam shaft, shaft sleeve through holes are formed in the position, corresponding to the brake cam, of the cam shaft sleeve, and the positions and the number of the shaft sleeve through holes correspond to those of exhaust valve rocker arms of the engine one to one;
The transmission shaft mechanism is arranged at each shaft sleeve through hole and comprises a transmission shaft, the transmission shaft is slidably arranged in the shaft sleeve through hole, the upper end of the transmission shaft extends into the cam shaft sleeve, and the lower end of the transmission shaft extends out of the cam shaft sleeve.
The cam shaft sleeve and the in-cylinder brake cam shaft share the same rotation center.
The axle centers of the shaft sleeve through holes are parallel to each other and pass through the centers of the cam shaft sleeves.
the transmission shaft adopts an assembly structure and comprises an upper transmission shaft and a lower transmission shaft which are fixedly connected together; and the upper end of the upper transmission shaft and the lower end of the lower transmission shaft are respectively provided with a limiting structure.
Wherein, limit structure is spacing stop.
Wherein, the limiting stopper is in the shape of a mushroom nail head.
The transmission shaft mechanism further comprises a return spring sleeved on the transmission shaft.
The reset spring is a reset pressure spring, the reset pressure spring is positioned outside the cam shaft sleeve, one end of the reset pressure spring abuts against the peripheral surface of the cam shaft sleeve, and the other end of the reset pressure spring abuts against the upper surface of the limiting stopper of the lower transmission shaft.
The reset spring is a reset tension spring, the reset tension spring is positioned in the cam shaft sleeve, one end of the reset tension spring abuts against the inner circumferential surface of the cam shaft sleeve, and the other end of the reset tension spring abuts against the lower surface of the limiting stopper of the upper transmission shaft.
And two ends of the cam shaft sleeve are respectively and rotatably connected with the in-cylinder brake cam shaft through bearings.
and one end of the in-cylinder braking camshaft is provided with a timing driving wheel, and the in-cylinder braking camshaft is in transmission connection with the output end of the crankshaft of the engine through the timing driving wheel.
The timing transmission wheel is a timing gear, a timing belt wheel or a timing chain wheel.
The cam shaft sleeve is driven by a power driving mechanism, the power driving mechanism comprises a transmission mechanism driven by a motor, and the output end of the transmission mechanism is connected with the cam shaft sleeve.
The transmission mechanism is a worm gear transmission mechanism, a gear transmission mechanism or a gear and rack transmission mechanism.
After the technical scheme is adopted, the invention has the following beneficial effects:
Since the compression-release in-cylinder brake device of the present invention includes: the braking cam shaft in the cylinder can rotate, and braking cams which correspond to the positions and the number of the cylinders of the engine one by one are arranged on the braking cam shaft in the cylinder; the cam shaft sleeve is sleeved outside the in-cylinder brake cam shaft and can rotate relative to the in-cylinder brake cam shaft, a shaft sleeve through hole is formed in the position, corresponding to the brake cam, of the cam shaft sleeve, and the positions and the number of the shaft sleeve through holes correspond to those of exhaust valve rocker arms of the engine one to one; the transmission shaft mechanism is arranged in each shaft sleeve through hole, and a transmission shaft of the transmission shaft mechanism is slidably arranged in each shaft sleeve through hole; when the engine enters a cylinder braking mode, the cam shaft sleeve rotates, the top of the exhaust valve rocker arm is gradually contacted with the transmission shaft along with the rotation of the cam shaft sleeve and gradually pushes the transmission shaft to move towards the center of the cam shaft sleeve, and the cam shaft sleeve rotates until the transmission shaft is positioned above the exhaust valve rocker arm; when the piston of each cylinder is positioned near the compression top dead center, the braking cam shaft in the cylinder rotates, under the action of the braking cam, the tip end of the cam applies pressure to the upper end of the transmission shaft, the lower end of the transmission shaft pushes the exhaust valve rocker arm to move, so that the exhaust valve is opened, the compression pressure is released, the braking cams corresponding to the cylinders act sequentially and respectively along with the rotation of the braking cam shaft in the cylinder, and when the piston of each cylinder is positioned at the compression top dead center, the exhaust valve is opened, the compression pressure is released, and the braking in the engine cylinder is realized; when the engine enters a normal working mode, the cam shaft sleeve rotates, the top of the exhaust valve rocker arm is gradually separated from the contact with the lower end of the transmission shaft along with the rotation of the cam shaft sleeve, the upper end of the transmission shaft is separated from the contact with the brake cam, and the in-cylinder brake device is in an idle state for the next in-cylinder brake.
The compression release type engine in-cylinder brake device disclosed by the invention only works in an in-cylinder brake mode; when the engine is in a normal working mode, the in-cylinder brake device is in an idle state and does not work; in the running process of the engine, the working time of the in-cylinder brake device is short, so that the reliability of the device is greatly improved, and the service life of the device is long.
Drawings
FIG. 1 is a schematic cross-sectional view of a compression-release engine in-cylinder brake apparatus according to an embodiment of the present invention;
3 FIG. 32 3 is 3 a 3 schematic 3 cross 3- 3 sectional 3 view 3 A 3- 3 A 3 of 3 FIG. 31 3 ( 3 engine 3 normal 3 operating 3 condition 3) 3; 3
FIG. 3 is the transfer shaft mechanism of FIG. 2 rotated with the cam sleeve up the exhaust valve rocker arm ready to enter an in-cylinder braking state;
FIG. 4 is a schematic illustration of the entry of FIG. 3 into an in-cylinder braking condition;
In the figure: 1-braking the camshaft in the cylinder; 11-a brake cam; 110-cam base circle; 111-cam tip; 2-cam shaft sleeve; 3-a transmission shaft mechanism; 31-a drive shaft; 311-upper transmission shaft; 3111-upper limit stop; 312-lower drive shaft; 3121-a lower limit stop; 32-a return spring; 4-a bearing; 5-a timing driving wheel; 6-a power drive mechanism; 61-a motor; 62-a transmission mechanism; 621-worm; 622-turbine block; 7-a rocker arm mechanism; 71-exhaust valve rocker arm; 72-rocker shaft; 8-exhaust valve mechanism; 81-an exhaust valve; 82-valve spring; the distance between the top end of the S-shaped transmission shaft and the cam base circle of the brake cam.
Detailed Description
The invention is further illustrated in the following non-restrictive manner with reference to the figures and examples.
As shown in fig. 1 to 4 in common, a compression-release type in-cylinder brake apparatus for an engine according to an embodiment of the present invention includes: the brake device comprises a rotatable in-cylinder brake camshaft 1, wherein brake cams 11 are arranged on the in-cylinder brake camshaft 1, and the positions and the number of the brake cams 11 correspond to the positions and the number of cylinders of an engine one by one; the cam shaft sleeve 2 is sleeved outside the in-cylinder brake camshaft 1 and can rotate relative to the in-cylinder brake camshaft 1, specifically, two ends of the cam shaft sleeve 2 are respectively and rotatably connected with the in-cylinder brake camshaft 1 through bearings 4, the cam shaft sleeve 2 and the in-cylinder brake camshaft 1 are preferably at the same rotation center, shaft sleeve through holes (not specifically marked in the figure) are arranged at positions corresponding to the brake cams 11 on the cam shaft sleeve 2, the positions and the number of the shaft sleeve through holes correspond to the positions and the number of exhaust valve rocker arms 71 of a rocker arm mechanism 7 of an engine one by one, and the optimal arrangement mode is that the axes of the shaft sleeve through holes are parallel to each other and all pass through the center of the cam shaft sleeve 2; and the transmission shaft mechanism 3 is arranged at the through hole of each shaft sleeve, the transmission shaft mechanism 3 comprises a transmission shaft 31, the transmission shaft 31 is slidably arranged in the through hole of each shaft sleeve, the upper end of the transmission shaft 31 extends into the cam shaft sleeve 2, and the lower end of the transmission shaft 31 extends out of the cam shaft sleeve 2.
the transmission shaft mechanism 3 further includes a return spring 32 sleeved on the transmission shaft 31. When the transmission shaft mechanism 3 is provided with only the transmission shaft 31, the transmission shaft 31 extends out of the cam sleeve 2 by its own weight, and there may be a jamming phenomenon. After the return spring 32 is added, the force applied by the return spring 32 and the gravity of the transmission shaft 31 can better ensure that the transmission shaft 31 extends out of the cam shaft sleeve 2.
For the convenience of installation with the camshaft sleeve 2, the transmission shaft 3 adopts an assembly structure, and includes an upper transmission shaft 311 and a lower transmission shaft 312 which are fixedly connected together, for example, a known threaded connection mode or an interference insertion mode can be adopted; further, the upper end of the upper transmission shaft 311 and the lower end of the lower transmission shaft 312 are respectively provided with a limiting structure, specifically, the limiting structure adopts a limiting stop form, that is, the upper transmission shaft 311 is provided with an upper limiting stop 3111, the lower transmission shaft 312 is provided with a lower limiting stop 3121, the upper limiting stop 3111 can prevent the transmission shaft 3 from falling out of the cam shaft sleeve 2, and the lower limiting stop 3121 plays a role of a spring seat for the return spring 32. Furthermore, the upper limit stopper 3111 and the lower limit stopper 3121 are both mushroom-head shaped, which facilitates the gradual contact or separation between the upper limit stopper 3111 and the cam tip 111 of the brake cam 11 and between the lower limit stopper 3121 and the top of the exhaust valve rocker 71, and improves the smoothness of the contact or separation.
In the present embodiment, the return spring 32 is in the form of a return compression spring, the return compression spring is located outside the camshaft sleeve 2, one end of the return compression spring abuts against the outer circumferential surface of the camshaft sleeve 2, and the other end of the return compression spring abuts against the upper surface of the lower limit stop 3121 of the lower transmission shaft 312.
obviously, the return spring 32 is not limited to the form shown in the figure, and the return spring 32 may also be in the form of a return tension spring, which is disposed inside the camshaft sleeve 2, and one end of the return tension spring abuts against the inner circumferential surface of the camshaft sleeve 2, and the other end of the return tension spring abuts against the lower surface of the upper limit stopper 3111 of the upper transmission shaft 3111. This arrangement is not shown in detail here.
As shown in fig. 1, a timing transmission wheel 5 is provided at one end of the in-cylinder brake camshaft 1, and the in-cylinder brake camshaft 1 is in transmission connection with the crankshaft output end of the engine through the timing transmission wheel 5, that is, the in-cylinder brake camshaft 1 rotates, preferably driven by the crankshaft of the engine. The timing transmission wheel 5 has various selectable modes, and may be a timing gear, a timing pulley, or a timing sprocket, which is not limited herein.
As shown in fig. 2 to 4, the camshaft housing 2 is driven by the power driving mechanism 6, and the power driving mechanism 6 preferably adopts a transmission mechanism 62 driven by a motor 61, and the output end of the transmission mechanism 62 is connected with the camshaft housing 2. The figure shows that the transmission mechanism 62 of the present embodiment adopts a worm gear and worm transmission mechanism, the worm gear and worm transmission mechanism includes a worm 621 driven by a motor 61 and a worm wheel block 622 meshed with the worm 621, and the worm wheel block 622 is fixedly arranged with the cam shaft sleeve 2. Of course, the turbine block 622 may be replaced by a whole circular turbine, and compared with the whole circular turbine, the turbine block 622 can meet the requirement of the rotation angle of the camshaft sleeve 2 and has lighter weight, and the turbine block is preferably used.
Obviously, the transmission mechanism 62 is not limited to the worm gear transmission mechanism in the present embodiment, and a well-known gear transmission mechanism or a rack and pinion transmission mechanism may be used, which is not limited herein.
The compression release type engine in-cylinder brake device provided by the embodiment of the invention has the following working principle:
As shown in fig. 2, when the engine enters the normal operation mode, the power driving mechanism 6 drives the camshaft sleeve 2 to rotate, and as the camshaft sleeve 2 rotates, the top of the exhaust valve rocker arm 71 gradually disengages from the lower end of the transmission shaft 31, the upper end of the transmission shaft 31 disengages from the brake cam 11, and the in-cylinder brake device is in an idle standby state.
As shown in fig. 3, when the engine enters the in-cylinder braking mode, the power driving mechanism 6 drives the camshaft sleeve 2 to rotate, the top of the exhaust valve rocker arm 71 is gradually contacted with the lower end of the transmission shaft 31 along with the rotation of the camshaft sleeve 2, and gradually pushes the transmission shaft 31 to move towards the center of the camshaft sleeve 2, because the force of the return spring 32 is small, the force of the valve spring 82 of the exhaust valve mechanism 8 cannot be overcome, the exhaust valve rocker arm 71 does not move relatively, the camshaft sleeve 2 rotates until the transmission shaft 31 is positioned above the exhaust valve rocker arm 71, at this time, the transmission shaft 31 does not contact the brake cam 11, the distance between the top of the transmission shaft 31 and the cam base circle 110 is S, S is usually controlled in the range of 0.3-0.5 mm, and at this time, the transmission shaft 31 does; as shown in fig. 4, when the piston of the cylinder is located near the compression top dead center, the in-cylinder brake camshaft 1 is driven by the engine crankshaft to rotate, and under the action of the brake cam 11, the cam tip 111 thereof presses the upper end of the transmission shaft 31, the lower end of the transmission shaft 31 pushes the exhaust valve rocker arm 71 to move, and the exhaust valve rocker arm 71 rotates downwards around the rocker arm shaft 72, so that the exhaust valve 81 is opened, and the compression pressure is released; with the rotation of the in-cylinder brake camshaft 1, the brake cams 11 corresponding to each cylinder act respectively in sequence, when the piston of each cylinder is positioned at the compression top dead center, the exhaust valve is opened, the compression pressure is released, and the in-cylinder brake of the engine is realized.
The foregoing is illustrative of the preferred embodiments of the present invention, and details that have not been described are within the skill of those in the art, and the scope of the invention is to be determined by the claims that follow, and all equivalent modifications that are within the scope of the invention are possible and that fall within the spirit and scope of the invention.
Claims (14)
1. Compression release engine in-cylinder brake device characterized by, includes:
The cylinder inner braking cam shaft is rotatable and is provided with braking cams, and the positions and the number of the braking cams correspond to the positions and the number of air cylinders of the engine one by one;
The cam shaft sleeve is sleeved outside the in-cylinder brake cam shaft and can rotate relative to the in-cylinder brake cam shaft, shaft sleeve through holes are formed in the position, corresponding to the brake cam, of the cam shaft sleeve, and the positions and the number of the shaft sleeve through holes correspond to those of exhaust valve rocker arms of the engine one to one;
The transmission shaft mechanism is arranged at each shaft sleeve through hole and comprises a transmission shaft, the transmission shaft is slidably arranged in the shaft sleeve through hole, the upper end of the transmission shaft extends into the cam shaft sleeve, and the lower end of the transmission shaft extends out of the cam shaft sleeve.
2. The compression-release engine in-cylinder brake apparatus as defined in claim 1, wherein said cam sleeve is concentric with said in-cylinder brake camshaft.
3. the compression-release engine in-cylinder brake apparatus as defined in claim 1, wherein the axial centers of said boss through-holes are parallel to each other and pass through the center of said cam boss.
4. The compression-release engine in-cylinder brake apparatus as defined in claim 1, wherein said transmission shaft is of an assembly structure including an upper transmission shaft and a lower transmission shaft fixedly connected together; and the upper end of the upper transmission shaft and the lower end of the lower transmission shaft are respectively provided with a limiting structure.
5. The compression-release engine in-cylinder brake apparatus as defined in claim 4, wherein said limit stop is a limit stop.
6. The compression-release engine in-cylinder brake apparatus as defined in claim 5, wherein said limit stop is in the shape of a mushroom-head.
7. The compression-release engine in-cylinder brake apparatus as defined in claim 5, wherein said transmission shaft mechanism further includes a return spring sleeved on said transmission shaft.
8. The compression-release engine in-cylinder brake apparatus as defined in claim 7, wherein the return spring is a return compression spring, the return compression spring is located outside the cam sleeve, one end of the return compression spring abuts against an outer circumferential surface of the cam sleeve, and the other end of the return compression spring abuts against an upper surface of the limit stopper of the lower transmission shaft.
9. The compression-release engine in-cylinder brake apparatus as defined in claim 7, wherein the return spring is a return tension spring, the return tension spring is located inside the cam sleeve, one end of the return tension spring abuts against an inner circumferential surface of the cam sleeve, and the other end of the return tension spring abuts against a lower surface of the stopper of the upper transmission shaft.
10. the compression-release engine in-cylinder brake apparatus as defined in claim 1, wherein both ends of said cam sleeve are rotatably connected to said in-cylinder brake cam shaft through bearings, respectively.
11. The compression-release engine in-cylinder brake apparatus as defined in claim 1, wherein one end of said in-cylinder brake camshaft is provided with a timing transmission wheel, said in-cylinder brake camshaft being drivingly connected to a crankshaft output of said engine through said timing transmission wheel.
12. The compression-release engine in-cylinder brake apparatus as defined in claim 11, wherein said timing transmission wheel is a timing gear, or a timing pulley, or a timing sprocket.
13. the compression-release engine in-cylinder brake apparatus as defined in claim 1, wherein said cam sleeve is driven by a power drive mechanism, said power drive mechanism including a transmission mechanism driven by a motor, an output of said transmission mechanism being connected to said cam sleeve.
14. The compression-release engine in-cylinder brake apparatus as defined in claim 13, wherein the transmission is a worm gear transmission, or a rack and pinion transmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910996870.1A CN110566310A (en) | 2019-10-19 | 2019-10-19 | compression release type in-cylinder brake device for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910996870.1A CN110566310A (en) | 2019-10-19 | 2019-10-19 | compression release type in-cylinder brake device for engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110566310A true CN110566310A (en) | 2019-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910996870.1A Pending CN110566310A (en) | 2019-10-19 | 2019-10-19 | compression release type in-cylinder brake device for engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110566310A (en) |
-
2019
- 2019-10-19 CN CN201910996870.1A patent/CN110566310A/en active Pending
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