CN112648040A - Engine compression release type brake and braking method thereof - Google Patents
Engine compression release type brake and braking method thereof Download PDFInfo
- Publication number
- CN112648040A CN112648040A CN202011530299.3A CN202011530299A CN112648040A CN 112648040 A CN112648040 A CN 112648040A CN 202011530299 A CN202011530299 A CN 202011530299A CN 112648040 A CN112648040 A CN 112648040A
- Authority
- CN
- China
- Prior art keywords
- brake
- rocker arm
- oil
- check valve
- engine 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.)
- Granted
Links
Images
Classifications
-
- 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
-
- 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
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L1/181—Centre pivot rocking arms
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/04—Check valves with guided rigid valve members shaped as balls
- F16K15/044—Check valves with guided rigid valve members shaped as balls spring-loaded
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0209—Check valves or pivoted valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0245—Construction of housing; Use of materials therefor of lift valves with ball-shaped valve members
Abstract
The invention discloses an engine compression release type brake and a braking method thereof, wherein the brake comprises a brake rocker arm, a rocker arm shaft and a brake actuating mechanism, the brake rocker arm is arranged on the rocker arm shaft through a rocker arm shaft hole, the brake actuating mechanism is connected to the brake rocker arm, the brake further comprises a brake oil way control mechanism, the brake oil way control mechanism is communicated with a brake oil way in the brake rocker arm, the brake oil way control mechanism comprises a sliding block and an elastic reset piece, the sliding block can slide in the direction vertical to the axis of the rocker arm shaft to compress or release the elastic reset piece, and the sliding block selectively opens a brake oil inlet leading to a hydraulic cavity of the brake actuating mechanism and closes an oil drain port leading to the outside of the brake rocker arm or closes an oil drain port leading to the. According to the engine compression release type brake and the braking method thereof, the braking oil path control mechanism is arranged in the rocker arm body around the rocker arm shaft, so that the size of the whole braking rocker arm is reduced, the arrangement space of the whole engine is saved, and the realization of light weight of an automobile is facilitated.
Description
Technical Field
The invention relates to the technical field of engine braking, in particular to an engine compression release type brake and a braking method thereof.
Background
The commercial vehicle for long-distance transportation needs to use braking frequently when running on a long gentle slope road, but the speed of the vehicle is reduced by continuously using the wheel type braking of a foot brake, the temperature of a brake pad is too fast due to long-time use of the wheel type braking, so that the temperature of the brake pad is too high, the braking effect is reduced or even the brake effect is failed, great irretrievable personal safety hazards and property loss are easily caused, and the important reason that great traffic accidents often occur on mountainous roads with complex terrain is also one of the important reasons. It is therefore necessary to equip commercial vehicles with auxiliary braking devices.
The common auxiliary brake is in the form of a hydraulic retarder, an engine exhaust brake, an engine rocker arm brake, and the like. The hydraulic retarder is large in size and weight, and is not beneficial to realizing the light weight of an automobile; the braking power of the engine exhaust brake is not too high, and the engine exhaust brake is usually matched with the engine rocker arm brake; the rocker arm brake of the engine has the characteristics of light weight, high brake power and the like. The working principle of the engine rocker arm brake is as follows: when the rocker arm of the engine is braked and started, the exhaust valve of the engine is driven by the small peach point on the cam to be opened near the top dead center of the compression stroke of the engine, and the compressed high-energy gas in the cylinder is rapidly exhausted out of the cylinder at the moment, so that the energy of the compressed gas is released, the braking effect is achieved, the energy of the engine is continuously released and consumed in a reciprocating manner after the high-energy gas is exhausted, the vehicle is finally decelerated, the temperature rise of a brake pad is not too high, and the safety and the reliability are realized. Engine braking is classified into air release braking and compression release braking in structural principle, wherein compression release braking is classified into bridge braking, dedicated rocker arm braking, and integrated rocker arm braking according to structural forms.
The integrated engine brake rocker arm in the current industry has the advantages of heavy structure, complex structure, slow response and low reliability, and the heavy structure is not beneficial to realizing the light weight of the automobile. The existing compression release type brake control adopts an overhead compression release type brake system, and has heavy volume and high cost; and an independent hydraulic control valve mechanism is arranged on the rocker arm, so that the weight of the rocker arm body is increased due to the control valve mechanism, the structure is complex, and the realization of light weight of an automobile is not facilitated.
Disclosure of Invention
The invention aims to provide a compact and light engine compression release brake and a braking method thereof.
In one aspect, the present invention provides an engine compression release brake including a brake rocker arm, a rocker arm shaft, and a brake actuator, the brake rocker arm is arranged on the rocker arm shaft through a rocker arm shaft hole, the brake actuating mechanism is arranged on the brake rocker arm, the brake also comprises a brake oil path control mechanism which is communicated with the brake oil path in the brake rocker arm, the brake oil path control mechanism comprises a sliding block and an elastic reset piece, the sliding block can slide in the direction vertical to the axis of the rocker arm shaft to compress or release the elastic reset piece, and the sliding block selectively opens the brake oil inlet communicated with the hydraulic cavity of the brake actuating mechanism and closes the oil drain opening communicated with the outside of the brake rocker arm or closes the rocker arm oil inlet and opens the oil drain opening in the sliding process.
In one embodiment, the sliding block and the elastic reset piece are installed in a sliding groove on the brake rocker arm, and the oil inlet and the oil drain are respectively communicated to the sliding groove.
In one embodiment, the slider, the sliding tray is the arc and encircles rocker shaft hole outer lane direction, elasticity reset piece is the leaf spring, the both ends of leaf spring are connected to the one end of slider and the one end of sliding tray respectively.
In one embodiment, the braking oil inlet is disposed at the bottom of the sliding groove and selectively communicated with the oil outlet of the rocker shaft, the oil drain port is disposed at the bottom of the sliding groove and located at two opposite ends of the sliding groove with the braking oil inlet, respectively, and the braking rocker arm is further provided with an oil leakage channel communicated with the sliding groove and the outside of the braking rocker arm.
In one embodiment, the brake rocker arm comprises a rocker arm body and an end cover, the end cover covers an end face on one side of the rocker arm shaft hole on the rocker arm body in the axial direction, the sliding groove is formed in the position, opposite to the end cover, of the rocker arm body, and the end cover seals the brake oil path control mechanism in the sliding groove.
In one embodiment, the brake further comprises a one-way valve, and the one-way valve is arranged on a brake oil path between the sliding groove and a hydraulic cavity of the brake actuating mechanism so as to open a brake oil path from the brake oil inlet to the hydraulic cavity in a one-way mode.
In one embodiment, the check valve is mounted in a check valve cylindrical bore in the brake rocker arm in a direction parallel to the axis of the rocker shaft.
In one embodiment, the check valve comprises a check valve ball valve, a check valve ball valve seat, a check valve spring and a check valve limit screw, the check valve limit screw is fixedly connected with the brake rocker arm through threads, the check valve spring is arranged between the check valve limit screw and the check valve ball valve seat, a guide rod of the check valve ball valve seat is inserted into the check valve spring, a ball socket surface of the check valve ball valve seat is attached to the check valve ball valve, and the check valve ball valve selectively closes or opens a check valve oil inlet on the brake oil path.
In one embodiment, the brake actuating mechanism is installed in the hydraulic cavity and comprises a brake actuating piston and a return elastic sheet, one end of the return elastic sheet is fixed with the brake rocker arm, and the elastic end part of the return elastic sheet is tightly attached to the bottom surface of the brake actuating piston.
In one embodiment, the brake actuator further includes an adjusting bolt, an adjusting nut, and a lock nut, the adjusting bolt is in threaded connection with the brake rocker arm on the upper portion of the hydraulic chamber, the adjusting nut is in threaded connection with the adjusting bolt, a flange extending into a brake piston hole of the brake actuator piston is arranged at the bottom of the adjusting bolt, the flange of the adjusting bolt extends into the brake piston hole of the brake actuator piston, and the diameter of an inner hole of the lock nut is smaller than the size of the flange of the adjusting bolt to limit the flange in the brake piston hole.
On the other hand, the invention discloses a braking method of an engine compression release type brake, which comprises the following steps: when a brake electromagnetic valve is switched on, the engine is switched from a normal working mode to a brake mode, brake hydraulic oil flows through the rocker shaft through the brake electromagnetic valve and then enters one side of the sliding block through the brake rocker oil inlet, the brake hydraulic oil pushes the sliding block to slide and compress the elastic reset piece, the sliding block slides to expose the brake oil inlet, and the brake hydraulic oil flows through the brake oil way from the brake oil inlet and enters the hydraulic cavity to push the brake actuating mechanism to actuate; when the brake electromagnetic valve is switched on, the engine is switched from a brake mode to a normal working mode, the brake hydraulic oil on one side of the sliding block is reduced, the sliding block is in sliding reset under the action of the elastic reset piece, the oil drainage port is exposed, the brake actuating mechanism is reset, and the brake hydraulic oil in the hydraulic cavity flows through the oil drainage port and flows out of the brake rocker arm through the oil drainage channel.
In an embodiment, the brake hydraulic oil is lubricating oil, and the oil leakage passage is disposed in a direction toward the brake actuator and exposed to the brake rocker arm.
The invention has the beneficial effects that: according to the engine compression release type brake and the braking method thereof, the braking oil way control mechanism is circumferentially arranged in the rocker arm body around the rocker arm shaft, so that the volume of the whole braking rocker arm is greatly reduced, the arrangement space of the whole engine is saved, and the realization of light weight of an automobile is facilitated; in the engine compression release type brake, the oil inlet and the oil drainage of the brake hydraulic oil slide in the sliding groove by the pressure of the brake hydraulic oil and the elastic restoring force of the leaf spring of the sliding block in the brake oil path control mechanism to realize switching, the structure is ingenious and simple, and the reliability of a brake system is favorably improved; the return of the brake actuating mechanism is realized through the return elastic sheet, and the brake actuating mechanism has the characteristics of simple structure, low cost and high reliability.
Drawings
FIG. 1 is an exploded view of a compression-release engine brake in accordance with a preferred embodiment of the present invention;
FIG. 2 is a schematic perspective view of the engine compression-release brake of FIG. 1 with the end cap removed and assembled;
FIG. 3 is a partial cross-sectional view of the engine compression-release brake of FIG. 2 in an initial state prior to brake-on;
FIG. 4 is a partial cross-sectional view of the engine compression-release brake of FIG. 2 after the brakes are applied;
FIG. 5 is a cross-sectional view of the engine compression-release brake of FIG. 1;
FIG. 6 is an enlarged view of portion A of FIG. 5;
FIG. 7 is another angular cross-sectional view of the engine compression-release brake of FIG. 1;
fig. 8 is a sectional view taken along the X-X direction in fig. 7.
The elements in the figures are numbered as follows:
the brake actuating device comprises an end cover (1), a sliding block (2), a leaf spring (3), an adjusting nut (4), a rocker arm body (5), a one-way valve ball valve (6), a one-way valve ball valve seat (7), a one-way valve spring (8), a one-way valve limiting screw (9), a locking nut (10), an adjusting bolt (11), a brake actuating piston (12), a screw (13), a return spring piece (14), a rocker arm shaft hole (15), a rocker arm oil inlet (16), a sliding groove (17), a brake actuating piston hydraulic cavity (18), an oil drain hole (19), an oil leakage channel (20), a one-way valve oil inlet hole (21) and a brake actuating piston oil inlet hole (22.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
The invention discloses an engine compression release type brake and a braking method thereof, aiming at the problems of complex structure and larger volume of the existing brake. The brake hydraulic oil enters the brake oil path of the brake rocker arm through the rocker arm shaft, and the brake oil path control mechanism opens the brake oil path under the hydraulic action of the brake hydraulic oil, so that the brake hydraulic oil is counted into the brake actuating mechanism through the one-way valve, and the brake is executed.
Referring to fig. 1 and 2, in the engine compression release brake according to the preferred embodiment of the present invention, the brake rocker arm includes a rocker arm body 5 and an end cap 1, and the end cap 1 covers an end surface of the rocker arm body 5 on one side of the rocker arm shaft hole 15 in the axial direction, so as to seal the brake oil path control mechanism in a cavity (i.e., a sliding groove 17) formed in the rocker arm body 5.
A rocker arm oil inlet 16 is formed in the side wall of a rocker arm shaft hole 15 of the rocker arm body 5, one end of the rocker arm oil inlet 16 is aligned with an oil outlet hole of the rocker arm shaft, and the other end of the rocker arm oil inlet is communicated to one end of the sliding groove 17. Namely, the brake hydraulic oil can enter the rocker arm oil inlet 16 through the oil outlet hole of the rocker arm shaft and then enter one end of the sliding groove 17 through the rocker arm oil inlet 16.
The rocker arm body 5 is also provided with a brake actuator piston hydraulic chamber 18 and an oil leak passage 20, as shown in fig. 7 and 8. The brake execution piston hydraulic cavity 18 is arranged on one side of the rocker arm body 5 and used for mounting a brake execution mechanism, and a brake hydraulic oil channel leading to one end of the one-way valve is arranged on the bottom surface of the sliding groove 17 of the rocker arm body 5 and leads to the upper end of the brake execution piston hydraulic cavity 18 from the side wall of the one-way valve. The oil leakage passage 20 communicates the sliding groove 17 with the outside of the rocker arm body 5, and leaks the brake hydraulic oil in the sliding groove 17 to the outside.
The brake oil path control mechanism is arranged in the circumferential direction of the rocker shaft hole 15 and comprises a sliding block 2 and a leaf spring 3, the sliding block 2 is slidably arranged in a sliding groove 17 formed in the rocker body 5 and is covered by an end cover 1 from one side, two ends of the leaf spring 3 are respectively connected with one end of the sliding block 2 and one end of the sliding groove 17, and the elastic restoring force of the leaf spring 3 is provided for the sliding block 2 to enable the sliding block 2 to slide to the initial position in the sliding groove 17. In the illustrated embodiment, the slider 2 has an arc shape about the axis of the rocker shaft hole 15, and correspondingly the slide groove 17 has an arc shape about the axis of the rocker shaft hole 15, so that the slider 2 can slide about the rocker shaft, and the sliding movement of the slider 2 in the slide groove 17 is also a rotation about the axis of the rocker shaft hole 15. In other embodiments, the sliding block 2 and the sliding groove 17 may adopt a linear sliding block and sliding groove structure. No matter the slider 2 is an arc slider or a linear slider, the moving direction of the slider 2 is in the direction vertical to the axis of the rocker shaft, so that the size of the brake rocker arm in the axis direction of the rocker shaft is compact, and the thickness of the brake rocker arm is reduced.
Referring to fig. 5 and 6, in the illustrated embodiment, the check valve is disposed in a check valve cylindrical hole formed in the rocker arm body 5 in a direction parallel to the rocker shaft, and includes a check valve ball valve 6, a check valve ball valve seat 7, a check valve spring 8, and a check valve limit screw 9, the check valve limit screw 9 is fastened and connected to the rocker arm body 5 through a screw thread, and a positioning boss is formed at one screwed end of the check valve limit screw 9 for positioning the check valve spring 8. The guide rod of the check valve ball valve seat 7 is inserted into the check valve spring 8 to realize the guide function. The nest surface of the one-way valve ball valve seat 7 is attached to the one-way valve ball valve 6 and is in contact sealing.
In the embodiment, the brake actuating mechanism comprises an adjusting bolt 11, an adjusting nut 4, a locking nut 10, a brake actuating piston 12 and a return elastic sheet 14, wherein the adjusting bolt 11 is in threaded connection with the rocker arm body 5 at the upper part of the brake actuating piston hydraulic cavity 18, and the adjusting nut 4 is in threaded connection with the adjusting bolt 11. The bottom of the adjusting bolt 11 is provided with a flange, the flange part of the adjusting bolt 11 extends into the brake piston hole of the brake actuating piston 12 and is limited by an annular locking nut 10, and the diameter of the inner hole of the locking nut 10 is smaller than the size of the flange of the adjusting bolt 11. The return elastic sheet 14 is fastened with the braking rocker arm body 5 through 2 screws 13, the elastic end part of the return elastic sheet 14 is tightly attached to the bottom surface of the braking execution piston 12, when braking is closed, the oil pressure of braking hydraulic oil is removed, and the braking execution piston 12 returns under the action of the return elastic sheet 14.
The braking method of the engine compression release brake comprises the following steps:
when the engine brake needs to be started, a brake electromagnetic valve is started, brake hydraulic oil flows through a rocker arm shaft through the electromagnetic valve and then enters a rocker arm oil inlet 16 aligned with a rocker arm shaft hole 15 on the rocker arm body 5 through a radial oil duct on the rocker arm shaft; the brake hydraulic oil flows into the slide groove 17 on one side of the slider 2, and the pressure of the brake hydraulic oil pushes the slider 2 to slide (counterclockwise as viewed in fig. 3 and 4) and compresses the leaf spring 3; when the sliding block 2 slides to a certain degree, the check valve oil inlet 21 arranged at the bottom of the sliding groove 17 is exposed at one side of the sliding block 2 contacting with the brake hydraulic oil, and the brake hydraulic oil further flows through a brake hydraulic oil passage beside the check valve from the check valve oil inlet 21 and enters the brake execution piston hydraulic cavity 18 from the brake execution piston oil inlet 22; the brake hydraulic oil pressure in the brake actuation piston hydraulic chamber 18 pushes the brake actuation piston 12 along the brake actuation piston hydraulic chamber 18 (downward as viewed in fig. 4) to effect engine compression release and actuation of the brake.
When the engine brake needs to be closed, the brake electromagnetic valve is closed, the pressure of a rocker arm oil inlet 16 at the rocker arm shaft hole 15 is suddenly and greatly reduced, the sliding block 2 slides along the sliding groove 17 under the action of the leaf spring 3 to reset to the initial position, the sliding block 2 blocks a check valve oil inlet 21 at the bottom of the sliding groove 17, and the oil drain port 19 is exposed; the brake actuating piston 12 is reset (moves upwards as shown in fig. 4) under the action of the return elastic sheet 14, and the oil drain port 19 is exposed; the oil drain port 19 is communicated with a check valve cylindrical hole in the rocker arm body 5 and a brake actuating piston oil inlet hole 22 of the brake actuating piston hydraulic cavity 18 (as shown in fig. 5 and 7), and high-pressure brake hydraulic oil in the brake actuating piston hydraulic cavity 18 flows through the brake actuating piston oil inlet hole 22, the check valve cylindrical hole, the oil drain port 19 and the oil drain passage 20 and flows out of the brake rocker arm, so that oil drainage is realized. The brake hydraulic oil flowing out of the brake rocker arm can be used as lubricating oil, and the outlet of the oil leakage channel 20 faces the part, exposed out of the brake rocker arm, of the brake actuating mechanism, so that the moving parts, such as the feet, of the brake actuating piston 12 can be subjected to splash lubrication and finally flow back to the oil pan.
Compared with the prior art, the engine compression release type brake and the braking method thereof have the following beneficial effects that:
(1) in the engine compression release brake, the brake oil way control mechanism is circumferentially arranged in the rocker arm body around the rocker arm shaft, so that the volume of the whole brake rocker arm is greatly reduced, the arrangement space of the whole brake rocker arm is saved, and the realization of light weight of an automobile is facilitated;
(2) in the engine compression release type brake, the oil inlet and the oil drainage of the brake hydraulic oil slide in the sliding groove by the pressure of the brake hydraulic oil and the elastic restoring force of the leaf spring of the sliding block in the brake oil path control mechanism to realize switching, the structure is ingenious and simple, and the reliability of a brake system is favorably improved;
(3) the return of the brake actuating mechanism is realized through the return elastic sheet, and the brake actuating mechanism has the characteristics of simple structure, low cost and high reliability.
The above-described embodiments of the present invention only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (12)
1. The utility model provides an engine compression release formula stopper, includes braking rocking arm, rocking arm axle and braking actuating mechanism, the braking rocking arm passes through the rocking arm shaft hole and installs on the rocking arm axle, braking actuating mechanism installs in the braking rocking arm, its characterized in that: the brake further comprises a brake oil path control mechanism, the brake oil path control mechanism is communicated with a brake oil path in the brake rocker arm, the brake oil path control mechanism comprises a sliding block and an elastic reset piece, the sliding block can slide in the direction perpendicular to the axis of the rocker arm shaft to compress or release the elastic reset piece, and the sliding block selectively opens a brake oil inlet leading to a hydraulic cavity of the brake actuating mechanism and closes an oil drainage port leading to the outside of the brake rocker arm or closes an oil inlet of the rocker arm and opens the oil drainage port in the sliding process.
2. The engine compression-release brake of claim 1, wherein: the sliding block and the elastic reset piece are installed in a sliding groove in the brake rocker arm, and the oil inlet and the oil drain port are communicated to the sliding groove respectively.
3. The engine compression-release brake of claim 2, wherein: the slider the sliding tray is the arc and encircles rocking arm shaft hole outer lane direction, the elasticity piece that resets is the leaf spring, the both ends of leaf spring are connected to respectively the one end of slider with the one end of sliding tray.
4. The engine compression-release brake of claim 2, wherein: the brake oil inlet is arranged at the bottom of the sliding groove and is selectively communicated with the oil outlet of the rocker arm shaft, the oil drain port is arranged at the bottom of the sliding groove and is respectively positioned at two opposite ends of the sliding groove with the brake oil inlet, and the brake rocker arm is further provided with an oil leakage channel communicated with the sliding groove and the outside of the brake rocker arm.
5. The engine compression-release brake of claim 3, wherein: the brake rocker arm comprises a rocker arm body and an end cover, the end cover covers the end face of one side of the rocker arm shaft hole on the rocker arm body in the axis direction, the sliding groove is formed in the position, opposite to the end cover, of the rocker arm body, and the end cover seals the brake oil path control mechanism in the sliding groove.
6. The engine compression-release brake of claim 1, wherein: the brake further comprises a one-way valve, and the one-way valve is arranged on a brake oil path between the sliding groove and a hydraulic cavity of the brake actuating mechanism so as to unidirectionally open a brake oil path from the brake oil inlet to the hydraulic cavity.
7. The engine compression-release brake of claim 6, wherein: the check valve is arranged in a check valve cylindrical hole on the brake rocker arm along the direction parallel to the axis of the rocker arm shaft.
8. The engine compression-release brake of claim 7, wherein: the check valve comprises a check valve ball valve, a check valve ball valve seat, a check valve spring and a check valve limiting screw, the check valve limiting screw is fixedly connected with the brake rocker arm through threads, the check valve spring is arranged between the check valve limiting screw and the check valve ball valve seat, a guide rod of the check valve ball valve seat is inserted into the check valve spring, a ball socket surface of the check valve ball valve seat is attached to the check valve ball valve, and the check valve ball valve selectively seals or opens a check valve oil inlet in the brake oil way.
9. The engine compression-release brake of claim 1, wherein: the brake actuating mechanism is installed in the hydraulic cavity and comprises a brake actuating piston and a return elastic sheet, one end of the return elastic sheet is fixed with the brake rocker arm, and the elastic end part of the return elastic sheet is tightly attached to the bottom surface of the brake actuating piston.
10. The engine compression-release brake of claim 1, wherein: the brake actuating mechanism further comprises an adjusting bolt, an adjusting nut and a locking nut, the adjusting bolt is in threaded connection with the brake rocker arm on the upper portion of the hydraulic cavity, the adjusting nut is in threaded connection with the adjusting bolt, a flange extending into a brake piston hole of the brake actuating piston is arranged at the bottom of the adjusting bolt, the flange part of the adjusting bolt extends into the brake piston hole of the brake actuating piston, and the inner hole diameter of the locking nut is smaller than the flange size of the adjusting bolt to limit the flange in the brake piston hole.
11. A braking method of an engine compression-release brake according to claim 1, characterized in that:
when a brake electromagnetic valve is switched on, the engine is switched from a normal working mode to a brake mode, brake hydraulic oil flows through the rocker shaft through the brake electromagnetic valve and then enters one side of the sliding block through the brake rocker oil inlet, the brake hydraulic oil pushes the sliding block to slide and compress the elastic reset piece, the sliding block slides to expose the brake oil inlet, and the brake hydraulic oil flows through the brake oil way from the brake oil inlet and enters the hydraulic cavity to push the brake actuating mechanism to actuate;
when the brake electromagnetic valve is switched on, the engine is switched from a brake mode to a normal working mode, the brake hydraulic oil on one side of the sliding block is reduced, the sliding block is in sliding reset under the action of the elastic reset piece, the oil drainage port is exposed, the brake actuating mechanism is reset, and the brake hydraulic oil in the hydraulic cavity flows through the oil drainage port and flows out of the brake rocker arm through the oil drainage channel.
12. The braking method of the engine compression-release brake as set forth in claim 11, wherein: the brake hydraulic oil is lubricating oil, and the oil leakage channel is arranged in the direction towards the brake actuating mechanism and exposed out of the brake rocker arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011530299.3A CN112648040B (en) | 2020-12-22 | 2020-12-22 | Engine compression release type brake and braking method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011530299.3A CN112648040B (en) | 2020-12-22 | 2020-12-22 | Engine compression release type brake and braking method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112648040A true CN112648040A (en) | 2021-04-13 |
| CN112648040B CN112648040B (en) | 2022-03-25 |
Family
ID=75359263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011530299.3A Active CN112648040B (en) | 2020-12-22 | 2020-12-22 | Engine compression release type brake and braking method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112648040B (en) |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6382149B1 (en) * | 1998-06-05 | 2002-05-07 | Bayerische Motoren Werke Aktiengesellschaft | Valve timing system for an internal combustion engine |
| JP2006521496A (en) * | 2003-03-29 | 2006-09-21 | ゲルリンデ・ベースル−フリエアル | Variable valve lift control system for combustion engine with under nice camshaft |
| CN201103432Y (en) * | 2007-12-06 | 2008-08-20 | 中国重汽集团济南技术中心有限公司 | Exhaust valve braking device for diesel engine |
| CN101319636A (en) * | 2008-06-03 | 2008-12-10 | 江苏大学 | Integrated valve actuating mechanism used for engine driving and braking condition, and its control method |
| CN101649761A (en) * | 2009-08-16 | 2010-02-17 | 李金龙 | Gas bleed brake of engine |
| US20120260870A1 (en) * | 2011-04-18 | 2012-10-18 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Camshaft having a sliding piece which has different cam profiles |
| CN103244231A (en) * | 2013-05-03 | 2013-08-14 | 深圳市特尔佳科技股份有限公司 | Variable-pressure gas release braking method and variable-pressure gas release brake for implementing same |
| CN203547822U (en) * | 2013-09-23 | 2014-04-16 | 浙江九隆机械有限公司 | Internal brake of engine cylinder |
| CN104481628A (en) * | 2014-12-25 | 2015-04-01 | 浙江康和机械科技有限公司 | Mechanical connection type engine integration rocker arm brake device with valve lift reset function |
| CN104500164A (en) * | 2015-01-03 | 2015-04-08 | 浙江康和机械科技有限公司 | Integrated engine brake rocker arm structure |
| CN105156168A (en) * | 2015-09-29 | 2015-12-16 | 东风商用车有限公司 | Slide rod type engine brake actuating device |
| CN105715323A (en) * | 2016-03-25 | 2016-06-29 | 上海尤顺汽车部件有限公司 | Engine valve movement switching mechanism |
| US20160281612A1 (en) * | 2013-08-12 | 2016-09-29 | Avl List Gmbh | Valve-actuating device for varying the valve lift |
| CN205677688U (en) * | 2016-06-08 | 2016-11-09 | 浙江黎明发动机零部件有限公司 | A kind of Combined rocking arm axle |
| EP3434870A1 (en) * | 2016-03-25 | 2019-01-30 | Shanghai Universoon Autoparts Co., Ltd | Multifunctional engine brake |
| CN110173321A (en) * | 2019-06-04 | 2019-08-27 | 浙江大学 | Engine integrated form variable rocker-arm retarder and its working method |
| CN110761869A (en) * | 2019-12-18 | 2020-02-07 | 潍柴动力股份有限公司 | Engine braking structure, engine braking system and engine |
| CN111691942A (en) * | 2020-06-29 | 2020-09-22 | 东风商用车有限公司 | Integrated braking rocker arm device of engine |
-
2020
- 2020-12-22 CN CN202011530299.3A patent/CN112648040B/en active Active
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6382149B1 (en) * | 1998-06-05 | 2002-05-07 | Bayerische Motoren Werke Aktiengesellschaft | Valve timing system for an internal combustion engine |
| JP2006521496A (en) * | 2003-03-29 | 2006-09-21 | ゲルリンデ・ベースル−フリエアル | Variable valve lift control system for combustion engine with under nice camshaft |
| CN201103432Y (en) * | 2007-12-06 | 2008-08-20 | 中国重汽集团济南技术中心有限公司 | Exhaust valve braking device for diesel engine |
| CN101319636A (en) * | 2008-06-03 | 2008-12-10 | 江苏大学 | Integrated valve actuating mechanism used for engine driving and braking condition, and its control method |
| CN101649761A (en) * | 2009-08-16 | 2010-02-17 | 李金龙 | Gas bleed brake of engine |
| US20120260870A1 (en) * | 2011-04-18 | 2012-10-18 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Camshaft having a sliding piece which has different cam profiles |
| CN103244231A (en) * | 2013-05-03 | 2013-08-14 | 深圳市特尔佳科技股份有限公司 | Variable-pressure gas release braking method and variable-pressure gas release brake for implementing same |
| US20160281612A1 (en) * | 2013-08-12 | 2016-09-29 | Avl List Gmbh | Valve-actuating device for varying the valve lift |
| CN203547822U (en) * | 2013-09-23 | 2014-04-16 | 浙江九隆机械有限公司 | Internal brake of engine cylinder |
| CN104481628A (en) * | 2014-12-25 | 2015-04-01 | 浙江康和机械科技有限公司 | Mechanical connection type engine integration rocker arm brake device with valve lift reset function |
| CN104500164A (en) * | 2015-01-03 | 2015-04-08 | 浙江康和机械科技有限公司 | Integrated engine brake rocker arm structure |
| CN105156168A (en) * | 2015-09-29 | 2015-12-16 | 东风商用车有限公司 | Slide rod type engine brake actuating device |
| CN105715323A (en) * | 2016-03-25 | 2016-06-29 | 上海尤顺汽车部件有限公司 | Engine valve movement switching mechanism |
| EP3434870A1 (en) * | 2016-03-25 | 2019-01-30 | Shanghai Universoon Autoparts Co., Ltd | Multifunctional engine brake |
| CN205677688U (en) * | 2016-06-08 | 2016-11-09 | 浙江黎明发动机零部件有限公司 | A kind of Combined rocking arm axle |
| CN110173321A (en) * | 2019-06-04 | 2019-08-27 | 浙江大学 | Engine integrated form variable rocker-arm retarder and its working method |
| CN110761869A (en) * | 2019-12-18 | 2020-02-07 | 潍柴动力股份有限公司 | Engine braking structure, engine braking system and engine |
| CN111691942A (en) * | 2020-06-29 | 2020-09-22 | 东风商用车有限公司 | Integrated braking rocker arm device of engine |
Non-Patent Citations (1)
| Title |
|---|
| 滕加庄等: "气动长行程执行机构设计及校验", 《广东化工》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112648040B (en) | 2022-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4054156A (en) | Exhaust brake valve | |
| KR101552487B1 (en) | Method and system for single exhaust valve bridge brake | |
| CN104500164A (en) | Integrated engine brake rocker arm structure | |
| CN201372829Y (en) | Rocker-valve-bridge compound engine braking device | |
| KR20120011311A (en) | Dedicated rocker arm engine brake | |
| CN110486114B (en) | Integrated engine brake execution piston | |
| CN111691942B (en) | Integrated braking rocker arm device of engine | |
| WO2011147190A1 (en) | Fixed chain type engine braking device | |
| CN109356683B (en) | Valve bridge assembly, in-cylinder brake system and engine | |
| CN110541761B (en) | Engine brake hydraulic control device capable of filling oil quickly | |
| WO2020088798A1 (en) | Bleeder type engine brake with hydraulic-mechanical actuation and lash adjustment | |
| CN112648040B (en) | Engine compression release type brake and braking method thereof | |
| EP2868876B1 (en) | Integrated engine brake | |
| JPH07500070A (en) | Hydraulic pressure switching valve for vehicle brake system | |
| KR910014625A (en) | DISC BRAKE FOR AUTOMOTIVE | |
| CN102312948A (en) | The disk type braker pusher plate is to the adhesive attachment of diaphragm | |
| JPS6312024B2 (en) | ||
| CN210396841U (en) | Hydraulic control type engine braking device | |
| CN1556311A (en) | Motor speed slower | |
| CN110578571B (en) | Hydraulic engine brake system | |
| CN211116163U (en) | Engine valve bridge device integrating braking function | |
| CN110925045A (en) | Hydraulically-controlled engine brake actuating mechanism and application method thereof | |
| RU74355U1 (en) | MANUAL BRAKE CRANE | |
| CN110529216B (en) | Electric control type engine braking device | |
| CN110374713B (en) | Engine braking device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |