CN210178432U - Engine integrated variable rocker retarder - Google Patents
Engine integrated variable rocker retarder Download PDFInfo
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- CN210178432U CN210178432U CN201920833149.6U CN201920833149U CN210178432U CN 210178432 U CN210178432 U CN 210178432U CN 201920833149 U CN201920833149 U CN 201920833149U CN 210178432 U CN210178432 U CN 210178432U
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- plunger
- main
- oil
- rocker arm
- slave
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Abstract
The utility model discloses a variable rocking arm retarber of engine integrated form. Comprises a rocker arm and a brake mechanism arranged at one end of the rocker arm; a main oil duct, a control oil duct and a blind hole are arranged in the rocker arm; the main oil duct leads to the through hole in the side face of the blind hole, the control oil duct leads to the through hole in the top of the blind hole through the internal channel of the adjusting screw, and the braking mechanism comprises the adjusting screw, an outer plunger, a main plunger and a slave plunger. The utility model has the advantages that: the utility model discloses optimize arrestment mechanism, not increasing the exhaust lift height, not restricting under the condition that the camshaft arranged the position, realized the exhaust valve reset technique, reached the highly integrated design, simultaneously, the utility model discloses the structure is compacter, processes simple to operate.
Description
Technical Field
The utility model belongs to the technical field of engine brake, a car auxiliary brake device, concretely relates to variable rocking arm retarber of engine integrated form.
Background
The engine brake device is a vehicle auxiliary brake device, which utilizes the pumping loss of the engine in the process of air intake and exhaust, the compression work consumed by the compression stroke and the mechanical loss in the working process to form the braking action on the driving wheel, the obtained braking power is stable, the engine brake device can be used for reducing and controlling the average driving speed of the vehicle in the long downhill, the overheating and the abrasion of a service brake system caused by long-term continuous working are effectively reduced, the service life of the brake is prolonged, and the driving safety of the vehicle is enhanced.
The engine brake devices commonly used at present are mainly classified into an exhaust type, a leakage type and a compression release type, and among them, the engine compression release type brake device has the best brake performance and generates brake power substantially equivalent to the rated power of the engine during normal driving operation. In the disclosed engine compression-release type brake device structure, the engine exhaust valve is opened near the end of the engine compression stroke, releasing the compressed gas at the compression top dead center. In a valve train assembly used with a compression engine brake assembly, a rocker arm oscillates with a rotating exhaust cam, pressing down on an exhaust valve to open it.
Disclosure of Invention
An object of the utility model is to provide a variable rocking arm retarber that is used for engine braking device's high integration.
In order to solve the technical problem, the utility model discloses a following technical scheme realizes:
the engine integrated variable rocker arm retarder comprises a rocker arm and a braking mechanism arranged at one end of the rocker arm; a main oil duct, a control oil duct and a blind hole are arranged in the rocker arm; the brake mechanism comprises an adjusting screw, an outer plunger piston which can move up and down in the blind hole, a main plunger piston which is sleeved in the outer plunger piston and can move up and down in the outer plunger piston, and a slave plunger piston; the upper end of the main plunger is contacted with the bottom of the adjusting screw, the lower end of the main plunger is connected with the top end of the slave plunger through a slave plunger spring, and the bottom end of the slave plunger is contacted with the exhaust rod through a elephant foot connected with the slave plunger for opening an exhaust valve to exhaust;
a one-way valve is arranged in the main plunger, and a high-pressure oil cavity can be formed between the inside of the main plunger and the top of the slave plunger by the switch of the one-way valve.
Furthermore, the adjusting screw part extends into the blind hole of the rocker arm, and an adjusting nut is sleeved on the adjusting screw.
Furthermore, an outer plunger spring is sleeved on the outer plunger, the upper end of the outer plunger spring is contacted with the bottom of the blind hole, and the lower end of the outer plunger spring is contacted with the outer plunger base.
Furthermore, the two sides of the main plunger and the two sides of the outer plunger are respectively provided with an oil duct, the oil ducts on the two sides of the outer plunger are communicated with the main oil duct, when the oil ducts on the two sides of the main plunger are communicated with the oil ducts on the two sides of the outer plunger in the process that the main plunger moves up and down relative to the outer plunger, the interior of the main plunger is communicated with the high-pressure oil cavity and the main oil duct between the tops of the auxiliary plungers, and the oil ducts on the two sides of the main plunger are blocked by the inner.
Further, the other end of the rocker arm is driven by an exhaust cam.
Furthermore, the control oil duct is electrified and supplied with oil through an electromagnetic valve.
The utility model has the advantages that: in the auxiliary braking mode, when the exhaust braking is finished, the exhaust valve is returned by releasing the oil pressure, and the effect of not influencing the normal exhaust lift height is achieved; when the main plunger moves upwards, the high-pressure oil cavity is formed by oil absorption, and the technical effect of resetting the exhaust valve is achieved. The exhaust brake part is integrated in a rocker blind hole, so that the processing difficulty of the rocker is reduced, and the effects of high integration and convenience in processing and installation are achieved.
Drawings
Fig. 1 is a schematic cross-sectional view of an engine integrated variable rocker retarder according to an exemplary embodiment of the present invention.
FIG. 2 is a schematic cross-sectional view of an integrated variable rocker retarder of an engine in an auxiliary braking mode.
FIG. 3 is a schematic cross-sectional view of the variable rocker retarder in a secondary braking mode with the bottom surface of the master plunger in contact with the top surface of the slave plunger.
FIG. 4 is a schematic cross-sectional view of a normal exhaust lift of the integrated variable rocker retarder of the engine.
Fig. 5 is a schematic cross-sectional view of the engine integrated variable rocker arm retarder during oil charging (main plunger oil passage and outer plunger oil passage are communicated) in the auxiliary braking mode.
FIG. 6 is a schematic cross-sectional view of the integrated variable rocker retarder of the engine at the end of filling oil in the auxiliary braking mode.
FIG. 7 is a schematic cross-sectional view of an engine integrated variable rocker retarder in a non-auxiliary braking mode.
In the figure: 1-adjusting screw, 2-adjusting nut, 3-one-way valve, 4-outer plunger, 5-main plunger, 6-auxiliary plunger, 7-outer plunger spring, 8-exhaust valve, 9-elephant foot, 10-auxiliary plunger spring, 11-main oil channel, 12-control oil channel, 13-exhaust cam, 14-rocker arm, 15-roller, 30-main plunger oil channel, 40-outer plunger oil channel, 13 a-braking bulge, 13 b-exhaust bulge, 13 c-buffering base circle and 13 d-small base circle.
Detailed Description
The following description will be made in detail with reference to the accompanying drawings, taking a four-stroke engine as an example, but not limiting the invention.
A braking mechanism is arranged at one end of a rocker arm 14 of the engine integrated variable rocker arm retarder, a main oil duct 11 and a control oil duct 12 are arranged in the rocker arm 14, and the action of the braking mechanism is controlled by matching with an electromagnetic valve signal so as to control the action of an exhaust valve 8.
The specific structure of the rocker arm 14 is as follows: a main oil duct 11 and a control oil duct 12 are arranged in the rocker arm 14, the main oil duct 11 leads to a through hole on the side surface of the blind hole, the control oil duct 12 leads to a through hole on the top of the blind hole through an internal channel of the adjusting screw 1, and the control oil duct 12 is electrified for oil supply through an electromagnetic valve.
The specific structure of the braking mechanism is as follows: one end of the rocker 14 is provided with an adjusting screw partially extending into a blind hole of the rocker, an adjusting nut 2 is sleeved on the adjusting screw 1 outside the blind hole, an outer plunger 4 capable of moving up and down is sleeved in the blind hole, the upper end of an outer plunger spring 7 sleeved on the outer plunger 4 is contacted with the bottom of the blind hole, the lower end of the outer plunger spring is contacted with a base of the outer plunger 4, a main plunger 5 sleeved inside the outer plunger 4 can move up and down in the outer plunger 4, the upper end of the main plunger 5 is contacted with the bottom of the adjusting screw 1, the lower end of the main plunger spring is connected with the top end of a slave plunger 6 sleeved inside the outer plunger 4 through a slave plunger spring 10, the slave plunger 6 can move up and down in the outer plunger 4, and the bottom end of the.
The main plunger 5 is internally provided with a check valve 3, and the switch of the check valve 3 can form a high-pressure oil chamber between the inside of the main plunger 5 and the top of the slave plunger 6.
The two sides of the main plunger 5 and the two sides of the outer plunger 4 are respectively provided with an oil passage, the outer plunger oil passage 40 is communicated with the main oil passage 11, when the main plunger oil passage 30 is communicated with the outer plunger oil passage 40 in the process that the main plunger 5 moves up and down relative to the outer plunger 4, the high-pressure oil chamber is communicated with the main oil passage 11, and otherwise, the main plunger oil passage 30 is blocked by the inner wall of the outer plunger 4.
The rocker arm 14 is driven at one end by an exhaust cam 13, and the exhaust cam 13 is provided with a normal exhaust lobe 13b, a compression release type brake lobe 13a, a cushion base circle 13c and a small base circle 13 d.
The first mode is as follows: engine auxiliary braking mode
The electromagnetic valve is electrified to supply oil to the control oil duct 12, lubricating oil is supplied to the high-pressure oil cavity through the control oil duct 12, the adjusting screw 1, the main plunger 5 and the one-way valve 3, and the one-way valve 3 is closed when the oil pressure inside and outside the high-pressure oil cavity tends to be equal. The hydraulic rigid connection is now formed between the main plunger 5 and the high-pressure oil chamber at the top of the secondary plunger 6 (fig. 1).
When the exhaust cam 13 rotates until the braking protrusion 13a contacts the roller 15, the rocker arm 14 and the adjusting screw 1 swing downwards, the main plunger 5 moves downwards towards the outer plunger 4 under the action of the adjusting screw 1, and the main plunger 5 is rigidly connected with the auxiliary plunger 6, so that the auxiliary plunger 6 also moves downwards, and the exhaust valve 8 is pushed open (as shown in fig. 2).
As the main plunger 5 moves downwards, the main plunger oil passage 30 is communicated with the outer plunger oil passage 40, and at this time, the lubricating oil in the high-pressure oil chamber is discharged to the main oil passage 11 due to the pressure difference, so that the exhaust valve 8 returns, and the bottom surface of the main plunger 5 is contacted with the top surface of the slave plunger 6 (as shown in fig. 3).
The exhaust cam 13 continues to rotate, when the exhaust cam 13 rotates until the exhaust boss 13b contacts with the roller 15, the main plunger 5, the slave plunger 6 and the outer plunger 4 move downwards under the action of the adjusting screw 1, the exhaust valve 8 opens again for exhaust, and at the moment, because the clearance between the main plunger 5 and the slave plunger 6 is eliminated, the exhaust lift height is the same as that in normal exhaust (as shown in fig. 4).
When the exhaust cam 13 continues to rotate to the buffering base circle 13c, the exhaust valve 8 returns, the main plunger 5 moves upwards under the action of the slave plunger spring 10, the main plunger oil channel 30 is communicated with the outer plunger oil channel 40, and at the moment, the high-pressure oil cavity sucks lubricating oil from the main oil channel 11 and the check valve 3 simultaneously due to pressure difference (as shown in fig. 5).
When the exhaust cam 13 continues to rotate to the small base circle 13d, the main plunger oil channel 30 is blocked by the inner wall of the outer plunger 4 along with the continuous upward movement of the main plunger 5, and at the moment, the high-pressure oil cavity sucks lubricating oil from the control oil channel 12 through the adjusting screw 1, the main plunger 5 and the check valve 3 due to pressure difference to form liquid rigid connection again. This concludes the four-stroke engine auxiliary braking cycle (fig. 6).
And a second mode: engine non-assisted braking mode
The solenoid valve is de-energized, the control oil duct 12 stops supplying oil, and part of the lubricating oil in the high-pressure oil chamber is discharged in the last cycle, and air is sucked from the control oil duct 12.
When the exhaust cam 13 rotates until the stop boss 13a contacts the roller 15, the rocker arm 14 and the adjusting screw 1 swing downwards, the main plunger 5 moves downwards under the action of the adjusting screw 1, and the air between the main plunger 5 and the slave plunger 6 is compressible, so that the slave plunger 6 cannot move downwards along with the main plunger 5 until the bottom surface of the main plunger 5 contacts the top surface of the slave plunger 6 (as shown in fig. 7).
When the exhaust cam 13 rotates continuously until the exhaust lobe 13b contacts with the roller 15, the main plunger 5, the slave plunger 6 and the outer plunger 4 move downwards under the action of the adjusting screw 1, the exhaust valve 8 is opened for exhaust, and the exhaust lift height is the same as that in normal exhaust because the clearance between the main plunger 5 and the slave plunger 6 is eliminated (as shown in fig. 4).
When the exhaust cam 13 continues to rotate to the buffering base circle 13c, the exhaust valve 8 returns, when the exhaust cam 13 continues to rotate to the small base circle 13d, the main plunger 5 moves upwards under the action of the slave plunger spring 10, the main plunger oil channel 30 is communicated with the outer plunger oil channel 40 along with the continuous upward movement of the main plunger 5, the lubricating oil is sucked from the main oil channel 11 by the high-pressure oil cavity due to pressure difference, the main plunger oil channel 30 is blocked by the inner wall of the outer plunger 4 along with the continuous upward movement of the main plunger 5, and the air is sucked from the control oil channel 12 through the adjusting screw 1, the main plunger 5 and the one-way valve 3 by the pressure difference. This concludes the one four-stroke engine non-assisted braking cycle.
Finally, it is also noted that the above disclosure is only illustrative of particular embodiments of the invention. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the invention should be considered as within the scope of the invention.
Claims (6)
1. Variable rocking arm retarber of engine integrated form, its characterized in that: comprises a rocker arm and a brake mechanism arranged at one end of the rocker arm; a main oil duct, a control oil duct and a blind hole are arranged in the rocker arm;
the main oil duct is communicated with the through hole at the side surface of the blind hole, the control oil duct is communicated with the through hole at the top of the blind hole through the inner channel of the adjusting screw,
the brake mechanism comprises an adjusting screw, an outer plunger piston capable of moving up and down in the blind hole, a main plunger piston and a slave plunger piston which are sleeved in the outer plunger piston and capable of moving up and down in the outer plunger piston; the upper end of the main plunger is contacted with the bottom of the adjusting screw, the lower end of the main plunger is connected with the top end of the slave plunger through a slave plunger spring, and the bottom end of the slave plunger is contacted with the exhaust rod through a elephant foot connected with the slave plunger for opening an exhaust valve to exhaust;
a one-way valve is arranged in the main plunger, and a high-pressure oil cavity can be formed between the inside of the main plunger and the top of the slave plunger by the switch of the one-way valve.
2. The engine integrated variable rocker retarder of claim 1, wherein: the adjusting screw part extends into the blind hole of the rocker arm, and an adjusting nut is sleeved on the adjusting screw.
3. The engine integrated variable rocker retarder of claim 1, wherein: the outer plunger is sleeved with an outer plunger spring, the upper end of the outer plunger spring is contacted with the bottom of the blind hole, and the lower end of the outer plunger spring is contacted with the outer plunger base.
4. The integrated variable rocker arm retarder of the engine as claimed in claim 1, wherein the two sides of the main plunger and the two sides of the outer plunger are respectively provided with an oil passage, the oil passages on the two sides of the outer plunger are communicated with the main oil passage, when the oil passages on the two sides of the main plunger are communicated with the oil passages on the two sides of the outer plunger during the up-and-down movement of the main plunger relative to the outer plunger, the high-pressure oil chamber and the main oil passage between the inside of the main plunger and the top of the slave plunger are communicated, and otherwise, the oil passages on the two sides of the main plunger.
5. The engine integrated variable rocker retarder of claim 1, wherein the other end of the rocker arm is driven by an exhaust cam.
6. The engine integrated variable rocker retarder of claim 1, wherein the control oil passage is powered by an electromagnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920833149.6U CN210178432U (en) | 2019-06-04 | 2019-06-04 | Engine integrated variable rocker retarder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920833149.6U CN210178432U (en) | 2019-06-04 | 2019-06-04 | Engine integrated variable rocker retarder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210178432U true CN210178432U (en) | 2020-03-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920833149.6U Withdrawn - After Issue CN210178432U (en) | 2019-06-04 | 2019-06-04 | Engine integrated variable rocker retarder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210178432U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173321A (en) * | 2019-06-04 | 2019-08-27 | 浙江大学 | Engine integrated form variable rocker-arm retarder and its working method |
-
2019
- 2019-06-04 CN CN201920833149.6U patent/CN210178432U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173321A (en) * | 2019-06-04 | 2019-08-27 | 浙江大学 | Engine integrated form variable rocker-arm retarder and its working method |
| CN110173321B (en) * | 2019-06-04 | 2023-07-21 | 浙江大学 | Engine integrated variable rocker arm retarder and working method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200509 Address after: 310058 Xihu District, Zhejiang, Yuhang Tong Road, No. 866, No. Co-patentee after: ZHEJIANG KANGHE MACHINERY TECHNOLOGY Co.,Ltd. Patentee after: ZHEJIANG University Address before: 310058 Xihu District, Zhejiang, Yuhang Tong Road, No. 866, No. Patentee before: ZHEJIANG University |
|
| TR01 | Transfer of patent right | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200324 Effective date of abandoning: 20230721 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20200324 Effective date of abandoning: 20230721 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |