CN202937322U - Integrated rocking arm for engine braking - Google Patents
Integrated rocking arm for engine braking Download PDFInfo
- Publication number
- CN202937322U CN202937322U CN 201220624960 CN201220624960U CN202937322U CN 202937322 U CN202937322 U CN 202937322U CN 201220624960 CN201220624960 CN 201220624960 CN 201220624960 U CN201220624960 U CN 201220624960U CN 202937322 U CN202937322 U CN 202937322U
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- braking
- valve
- cavity
- engine
- control valve
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- Expired - Fee Related
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- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The utility model relates to an integrated rocking arm for engine braking. The rocking arm is characterized in that an active braking cavity, a control valve cavity and a slave braking cavity are distributed on an exhaust rocking arm; an active braking valve is mounted in the active braking cavity, and an active valve return spring is sleeved on the active valve; a control valve is mounted in the control valve cavity, and a control valve return spring is sleeved on the control valve; a slave braking valve is mounted in the slave braking cavity, a slave valve return spring is sleeved on the slave braking valve, and the active braking valve works under the driving by a special cam; the active braking cavity is located at the tail end of the exhaust rocking arm, the control valve cavity is located above the active braking cavity, and the slave braking cavity is located at the front end of the exhaust rocking arm; and the active braking cavity, the control valve cavity and the slave braking cavity are communicated by an oil way on the exhaust rocking arm. The integrated rocking arm for the engine braking has the beneficial effects that the independent cam type engine braking of an engine can be achieved, that is, the special cam is used for the engine braking, the independent cam braking of a camshaft of an overhead camshaft engine is achieved at an air inlet side, and the brake power is improved.
Description
Technical field
The utility model relates to a kind of rocker arm for braking integrated engine, particularly relates to diesel engine auxiliary braking rocking arm, belongs to the diesel engine technologies field,
Background technique
The gross mass of Hyundai Motor is increasing, and the speed of a motor vehicle is more and more higher, only relies on the primary brake system of vehicle self can not satisfy brake request under the vehicle high-speed fully loaded transportation condition.In order to guarantee the Safety performance of vehicle, must increase complemental brake system.Engine braking is by the fall holder of automobile to motor, utilizes mechanical loss, pumping loss and the compression work etc. of motor to produce braking function, thereby increases automobile brake power.
When the precipitous road surfaces such as lower long slope, rugged hill path, must utilize engine braking, effectively reduce the frequency of utilization of foot brake, avoid causing the temperature of brake bush to raise because of the long-time break that uses, braking force is descended, even ineffective.
Summary of the invention
The purpose of this utility model is to provide a kind of rocker arm for braking integrated engine, it can make motor realize the independent cam type engine braking, namely the cam of a special use is used for engine braking, realize that the overhead camshaft engine camshaft realizes independent cam braking having improved braking force in the air inlet side.
Technical problem of the present utility model is solved by the following technical programs: a kind of rocker arm for braking integrated engine is characterized in that: be furnished with on exhaust rocker arm braking initiatively the chamber, control valve pocket, brake driven chamber; Wherein braking is initiatively installed the braking aggressive valve in the chamber, and the aggressive valve return spring is sleeved on aggressive valve; Control control valve is installed in valve pocket, the control valve return spring is sleeved on control valve; Brake the braking servo valve is installed in driven chamber, the servo valve return spring is sleeved on the braking servo valve, and the braking aggressive valve is worked under the driving of dedicated cam; Braking active chamber is positioned at the end of exhaust rocker arm, controls the top that valve pocket is positioned at braking active chamber, brakes the front end that driven chamber is positioned at exhaust rocker arm; Braking initiatively the chamber, control valve pocket, braking driven chamber and be connected by the oil circuit on exhaust rocker arm.
When working, engine braking forms a closing oil path between described braking aggressive valve and braking servo valve.
Good effect of the present utility model is rational in infrastructure, and is easy to operate, realizes that the overhead camshaft engine camshaft realizes independent cam braking having improved braking force in the air inlet side.
Description of drawings
Fig. 1 is the structural drawing of rocker arm for braking integrated engine device.
Fig. 2 is the external structure schematic diagram of rocker arm for braking integrated engine device.
When Fig. 3 is engine braking work, the key plan of each device in rocking arm.
Fig. 4 is when cancelling engine braking, the key plan of each device in rocking arm.
Block diagram when Fig. 5 is rocker arm for braking integrated engine work.
Embodiment
Below in conjunction with accompanying drawing, the utility model is done progressive description: as shown in Figure 1, 2, a kind of rocker arm for braking integrated engine is characterized in that: be furnished with on exhaust rocker arm 1 braking initiatively chamber 2, control valve pocket 3, braking driven chamber 4; Wherein aggressive valve 5 is braked in the interior installation in braking active chamber 2, and aggressive valve return spring 6 is sleeved on aggressive valve; Control the interior installation control valve 7 of valve pocket 3, control valve return spring 8 is sleeved on control valve; Brake the interior installation braking in driven chamber 4 servo valve 9, servo valve return spring 10 is sleeved on the braking servo valve, and the braking aggressive valve is worked under the driving of dedicated cam; Braking active chamber 2 is positioned at the end of exhaust rocker arm 1, controls the top that valve pocket 3 is positioned at braking active chamber 2, brakes the front end that driven chamber 4 is positioned at exhaust rocker arm 1.Braking initiatively chamber 2, control valve pocket 3, braking driven chamber 4 and be connected by the oil circuit on exhaust rocker arm 1.
When working, engine braking forms a closing oil path between described braking aggressive valve 5 and braking servo valve 9.
a dedicated cam 11 that is specifically designed to engine braking is arranged on camshaft, as shown in Figure 3, when needing engine braking work, machine oil enters through the brake circuit of pitman arm shaft the braking active chamber 2 that is integrated on exhaust rocker arm 1, control valve pocket 3 and brake driven chamber 4, machine oil compression brake aggressive valve 5 moves downward, braking aggressive valve 5 is contacted with dedicated cam, under the driving of dedicated cam 11, braking aggressive valve 5 compressor oils, by the oil duct in exhaust rocker arm 1, drive braking servo valve 9 and open an exhaust valve 12 near piston top dead center, discharge cylinder inner high voltage gas, realize the engine braking function, improve braking force.
As shown in Figure 4,When cancelling braking state, do not have engine oil pressure to be reduced near 0 in the braking oil duct, braking aggressive valve 5 breaks away from dedicated cam 11 under the effect of aggressive valve return spring 6, braking servo valve 9 rests on the top under the effect of servo valve return spring 10, can not open exhaust valve 12, engine braking is inoperative, engine work.
The interior integrated braking aggressive valve 5 of exhaust rocker arm 1, braking servo valve 9 and a cover machine oil control gear, braking aggressive valve 5 is used for compressor oil, drives braking servo valve 9 by machine oil; The machine oil control gear is the switch gear of engine braking, after engine braking is controlled the solenoid valve energising, pressure machine oil enters the braking oil duct on exhaust rocker arm 1, promote control valve 7 and close braking draining passage, make the oil circuit that forms sealing between braking aggressive valve 5 and braking servo valve 9, engine braking works; After the solenoid valve outage, oil duct pressure decreased on exhaust rocker arm 1 is near 0, control valve 7 resets under the effect of control valve return spring 8, braking draining road is opened, pressure in brake circuit descends rapidly, braking aggressive valve 5 and braking servo valve 9 reset under the effect of return spring separately, and engine braking is inoperative.
Block diagram when working as Fig. 5 rocker arm for braking integrated engine, when lower long slope, rugged hill path or under the high-speed overload condition, complemental brake system is started working, after car load ECU sends brake signal, solenoid valve is opened, and oil pressure actuated machine oil control gear makes the braking aggressive valve promote the braking servo valve, exhaust valve is opened, and realizes braking function.
In a word, this integrated engine brake structure is simple, good rigidity, and cost is low; Be integrated on exhaust rocker arm 1 owing to braking aggressive valve 5, can make camshaft use easily the independent cam type engine braking at the motor of air inlet side.
Claims (2)
1. rocker arm for braking integrated engine is characterized in that: be furnished with on exhaust rocker arm braking initiatively the chamber, control valve pocket, brake driven chamber; Wherein braking is initiatively installed the braking aggressive valve in the chamber, and the aggressive valve return spring is sleeved on aggressive valve; Control control valve is installed in valve pocket, the control valve return spring is sleeved on control valve; Brake the braking servo valve is installed in driven chamber, the servo valve return spring is sleeved on the braking servo valve, and the braking aggressive valve is worked under the driving of dedicated cam; Braking active chamber is positioned at the end of exhaust rocker arm, controls the top that valve pocket is positioned at braking active chamber, brakes the front end that driven chamber is positioned at exhaust rocker arm; Braking initiatively the chamber, control valve pocket, braking driven chamber and be connected by the oil circuit on exhaust rocker arm.
2. a kind of rocker arm for braking integrated engine according to claim 1, is characterized in that forming a closing oil path between described braking aggressive valve and braking servo valve when engine braking is worked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220624960 CN202937322U (en) | 2012-11-23 | 2012-11-23 | Integrated rocking arm for engine braking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220624960 CN202937322U (en) | 2012-11-23 | 2012-11-23 | Integrated rocking arm for engine braking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202937322U true CN202937322U (en) | 2013-05-15 |
Family
ID=48321566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220624960 Expired - Fee Related CN202937322U (en) | 2012-11-23 | 2012-11-23 | Integrated rocking arm for engine braking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202937322U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937041A (en) * | 2012-11-23 | 2013-02-20 | 中国第一汽车股份有限公司 | Rocker arm body capable of realizing braking function of engine |
| US9068478B2 (en) | 2013-02-25 | 2015-06-30 | Jacobs Vehicle Systems, Inc. | Apparatus and system comprising integrated master-slave pistons for actuating engine valves |
-
2012
- 2012-11-23 CN CN 201220624960 patent/CN202937322U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937041A (en) * | 2012-11-23 | 2013-02-20 | 中国第一汽车股份有限公司 | Rocker arm body capable of realizing braking function of engine |
| US9068478B2 (en) | 2013-02-25 | 2015-06-30 | Jacobs Vehicle Systems, Inc. | Apparatus and system comprising integrated master-slave pistons for actuating engine valves |
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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 |
Granted publication date: 20130515 Termination date: 20191123 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |