Engine pressure reducing device and engine thereof
A decompression device and engine technology, applied in the direction of engine components, machines/engines, valve devices, etc., can solve the problems of complexity and many parts of the decompression device, and achieve the effects of easy starting, saving installation space, and simple structure
Active Publication Date: 2021-11-19
五羊—本田摩托(广州)有限公司
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Although this decompression device can play a role every time the engine is started, the decompression device in this structural form has many and complicated components.
Method used
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Embodiment 1
[0036] like Figure 1-4 As shown, an engine decompression device is provided in this embodiment, which mainly includes a counterweight 1 and an elastic reset member 2. The counterweight 1 is relatively slidably arranged on the camshaft 3. The counterweight 1 is protruded toward the outside with a raised portion 11; wherein, the sliding motion of the counterweight 1 on the camshaft 3 includes a first motion state and a second motion state, and when in the first motion state , the raised portion 11 can move to abut against the exhaust rocker arm 41 of the engine 4 to perform the exhaust decompression operation, and when in the second moving state, the raised portion 11 can move to It is only in contact or separated from the exhaust rocker arm 41, so that the combustion chamber of the engine 4 returns to the normal working state. The elastic reset member 2 is used for switching the counterweight 1 between the first motion state and the second motion state.
[0037] Specifically...
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The invention belongs to the technical field of engines, and provides an engine pressure reducing device and an engine thereof. The engine pressure reducing device mainly comprises a balancing weight and an elastic reset piece; the balancing weight is arranged on a cam shaft in a manner of being capable of relatively sliding, a protruding part is arranged on the balancing weight in a manner of protruding towards the outer side, sliding motion of the balancing weight on the cam shaft comprises a first motion state and a second motion state, when the balancing weight is in the first motion state, the protruding part can move to abut against and make contact with an exhaust rocker arm of the engine so as to carry out exhaust operation, and when the balancing weight is in the second motion state, the protruding part can move to make contact with and be separated from the exhaust rocker arm; and the elastic reset piece is used for switching between the first motion state and the second motion state. According to the engine pressure reducing device and the engine, the compression pressure of the engine can be reduced during starting, and therefore the required starting force is reduced, the design is ingenious, the structure is simple, and the mounting space on the cam shaft can be effectively saved.
Description
technical field [0001] The invention belongs to the technical field of engines, and in particular relates to an engine decompression device and an engine thereof. Background technique [0002] The decompression device of the engine is a device that reduces the pressure of the combustion chamber when the engine is started, thereby reducing the rotational torque of the engine crankshaft, so that a smaller starter motor can be used to drive the engine to start. [0003] In the prior art, such as the patent document with the application number 200810149294.9, a decompression device for an engine is disclosed. Rotating in the opposite direction to the engine rotation direction, the cam lobe provided on the decompression cam presses the intake valve or exhaust valve to reduce the pressure of the combustion chamber, thereby reducing the crankshaft torque at the next start. The disadvantage of this decompression device is that it only works when the engine is started for the first ...
Claims
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IPC IPC(8): F01L13/08
CPCF01L13/08
Inventor 何瑞川赵玉晓王贵富左支柳
Owner 五羊—本田摩托(广州)有限公司