CN202325734U - Engine braked rocker arm shaft support - Google Patents
Engine braked rocker arm shaft support Download PDFInfo
- Publication number
- CN202325734U CN202325734U CN2011204408168U CN201120440816U CN202325734U CN 202325734 U CN202325734 U CN 202325734U CN 2011204408168 U CN2011204408168 U CN 2011204408168U CN 201120440816 U CN201120440816 U CN 201120440816U CN 202325734 U CN202325734 U CN 202325734U
- Authority
- CN
- China
- Prior art keywords
- arm shaft
- control valve
- rocker arm
- brake
- pitman arm
- 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.)
- Expired - Fee Related
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- Valve Device For Special Equipments (AREA)
Abstract
The utility model relates to an engine braked rocker arm shaft support, which consists of a rocker arm shaft support, a brake driving piston, a control valve, a driving piston return spring, a control valve return spring, a rocker arm shaft and a brake oil path, and is characterized in that: the brake oil path is arranged in the rocker arm shaft; an oil path is arranged in the rocker arm shaft support; the rocker arm shaft support is arranged on the rocker arm shaft, and the internal oil path is communicated with the brake oil path in the rocker arm shaft; a control valve cavity and a brake driving cavity are arranged at the tail end of the rocker arm shaft; the control valve is arranged in the control valve cavity; the control valve return spring is sleeved on the control valve; the brake driving piston is arranged in the driving piston cavity; and the driving piston return spring is sleeved on the brake driving piston. The engine braked rocker arm shaft support has a simple structure and high rigidity, is low in cost, can provide a control function for a brake device, has the capacity of improving the engine brake power and is suitable for an engine with a higher auxiliary brake requirement.
Description
Technical field
The utility model relates to a kind of pitman arm shaft bearing of engine braking, uses and DENG, belongs to a kind of independent cam formula engine brake elements.
Background technique
The gross mass of Hyundai Motor is increasing, and the speed of a motor vehicle is increasingly high, only relies on the primary brake system of vehicle self can not satisfy the brake request under the vehicle high-speed overload condition.In order to guarantee the Safety performance of vehicle, must increase complemental brake system.Engine braking is through the fall holder of automobile to motor, utilizes Engine Mechanical loss, pumping loss and compression work etc. to produce braking function, thereby increases automobile brake power.
When precipitous road surfaces such as lower long slope, rugged hill path, must utilize engine braking, reduce the frequency of utilization of foot brake effectively, avoid causing the temperature of brake bush to raise because of the long-time break that uses, braking force is descended, in addition ineffective.
Summary of the invention
The purpose of the utility model provides a kind of pitman arm shaft bearing of engine braking, and it can improve engine brake power for braking device provides the control function, is applicable on the motor of higher auxiliary braking requirement.
The technological scheme of the utility model is achieved in that a kind of pitman arm shaft bearing of engine braking; Form by pitman arm shaft bearing, braking active piston, control valve, active piston return spring, control valve return spring, pitman arm shaft, brake circuit; It is characterized in that: there is brake circuit pitman arm shaft inside, and there is oil circuit pitman arm shaft bearing inside, and the pitman arm shaft bearing is installed on the pitman arm shaft; Internal oil passages communicates with the inner brake circuit of pitman arm shaft; pitman arm shaft bearing tail end is arranged the control valve pocket and brake initiatively chamber that installation and control valve in the control valve pocket is with the control valve return spring on the control valve; install in the active piston chamber and brake active piston, be with the active piston return spring on the braking active piston.
The good effect of the utility model is simple in structure, good rigidity, and cost is low, can make camshaft use independent cam formula engine braking easily at the motor of air inlet side.
Description of drawings
Fig. 1 is the structural drawing of the utility model.
Fig. 2 is the pitman arm shaft bearing cut-away view of the utility model.
Fig. 3 implements illustration in engine braking when work of the utility model.
Fig. 4 implements illustration when not working for the engine braking of the utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further: like Fig. 1, shown in 2; A kind of pitman arm shaft bearing of engine braking is made up of pitman arm shaft bearing 1, braking active piston 2, control valve 3, active piston return spring 4, control valve return spring 5, pitman arm shaft 6, brake circuit 7, and it is characterized in that: there is brake circuit 7 pitman arm shaft 6 inside; there is oil circuit pitman arm shaft bearing 1 inside; pitman arm shaft bearing 1 is installed on the pitman arm shaft 6, and internal oil passages communicates with pitman arm shaft 6 inner brake circuits 7, and pitman arm shaft bearing 1 tail end is arranged initiatively chamber of control valve pocket and braking; installation and control valve 3 in the control valve pocket; be with control valve return spring 5 on the control valve 3, and installation braking active piston 2 is with active piston return spring 4 on the braking active piston 2 in the active piston chamber.
Embodiment, like Fig. 1, shown in 2, pitman arm shaft bearing 1 is installed on the pitman arm shaft 6, an integrated braking active piston 2 and a cover machine oil control gear in the pitman arm shaft bearing 1, braking active piston 2 is used for compressor oil, drives driven intracavitary unit motion through machine oil; The machine oil control gear is the switch gear of engine braking; When the needs engine braking was worked, pressure machine oil got into the oil duct on the pitman arm shaft bearing 1, promoted control valve 3 and closed braking draining passage; Make the oil circuit that forms sealing between braking active piston 2 and the driven chamber, engine braking works; During the cancellation engine braking; the oil duct pressure on the pitman arm shaft bearing 1 is reduced near 0; control valve 3 resets under the effect of control valve return spring 5, braking draining road is opened, and the pressure in the brake circuit descends rapidly; braking active piston 2 resets under the effect of return spring, and engine braking is inoperative.
As shown in Figure 3, when needing engine braking work, the brake circuit 7 of machine oil in pitman arm shaft 6 gets into the driven chamber 9 of braking in braking active chamber, control valve pocket and the exhaust rocker arm in the pitman arm shaft bearing 1; Machine oil compression brake active piston 2 moves downward, and braking active piston 2 is contacted, under the driving of dedicated cam 8 with dedicated cam; Braking active piston 2 compressor oils; Through the oil duct in the pitman arm shaft 6, device is opened an exhaust valve in the driven chamber 9 of drive brake, discharges cylinder inner high voltage gas; Realize the engine braking function, improve braking force.
As shown in Figure 4, during the cancellation braking state, braking oil duct 7 inner engine oil pressure reduce; Braking active piston 2 breaks away from dedicated cam 8 under the effect of active piston return spring 4; No longer device motion in the driven chamber 9 of drive brake, engine braking is inoperative, the motor proper functioning.
Control valve 3 is one-way valves, and when engine braking worked, machine oil to flow into braking initiatively chamber and the driven chamber of braking, cannot flow out only, thereby forms the oil circuit of a sealing, engine braking work; When the cancellation engine braking, machine oil draws off through the oilhole that unloads of control valve bottom, and braking initiatively chamber descends with the driven cavity pressure of braking, and braking active piston 2 resets under the return spring effect.
Claims (1)
1. the pitman arm shaft bearing of an engine braking is made up of pitman arm shaft bearing, braking active piston, control valve, active piston return spring, control valve return spring, pitman arm shaft, brake circuit, and it is characterized in that: there is brake circuit pitman arm shaft inside; there is oil circuit pitman arm shaft bearing inside; the pitman arm shaft bearing is installed on the pitman arm shaft, and internal oil passages communicates with the inner brake circuit of pitman arm shaft, and pitman arm shaft bearing tail end is arranged initiatively chamber of control valve pocket and braking; installation and control valve in the control valve pocket; be with the control valve return spring on the control valve, and installation braking active piston is with the active piston return spring on the braking active piston in the active piston chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204408168U CN202325734U (en) | 2011-11-09 | 2011-11-09 | Engine braked rocker arm shaft support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204408168U CN202325734U (en) | 2011-11-09 | 2011-11-09 | Engine braked rocker arm shaft support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202325734U true CN202325734U (en) | 2012-07-11 |
Family
ID=46437717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204408168U Expired - Fee Related CN202325734U (en) | 2011-11-09 | 2011-11-09 | Engine braked rocker arm shaft support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202325734U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021223420A1 (en) * | 2020-05-08 | 2021-11-11 | 广西玉柴机器股份有限公司 | Oil path bridging mechanism for engine braking system |
-
2011
- 2011-11-09 CN CN2011204408168U patent/CN202325734U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021223420A1 (en) * | 2020-05-08 | 2021-11-11 | 广西玉柴机器股份有限公司 | Oil path bridging mechanism for engine braking system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20191109 |