摩托车的二冲程和四冲程车有什么不同（Whats the difference between a two stroke and a four stroke motorcycle）.docVIP

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摩托车的二冲程和四冲程车有什么不同（Whats the difference between a two stroke and a four stroke motorcycle）.doc

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摩托车的二冲程和四冲程车有什么不同（Whats the difference between a two stroke and a four stroke motorcycle） With the progress of society and the development of science and technology, motorcycle has become an indispensable means of transportation in peoples daily life. At present, generally used motorcycle engine can be divided into four stroke and two stroke two major categories, then, the four stroke and the two stroke of these two motorcycles what are the differences between them? First, the structure is different The thermal part of two stroke motorcycle is mainly composed of cylinder head, cylinder, piston, piston ring and other parts. The main part of the four stroke motorcycle consists of the cylinder head, the cylinder head, the cylinder, the piston, the piston ring and the valve train. The valve train comprises a valve, an air valve guide, an air valve seat, a valve spring, an air distribution cam, a gas distribution chain, a gas distribution sprocket, a chain tensioner, a rocker arm and other parts. Comparatively speaking, the two stroke motorcycle is smaller than the four stroke motorcycle, has the advantages of simple structure, light weight, and convenient manufacture and maintenance. Two, the work process is different In order for the engine to work and burn continuously, a series of actions are required to be repeated in a certain order. First, the mixture is sucked into the cylinder, and the gas is compressed to produce expansion, and the combustion gas is expelled from the cylinder. Thus, the four processes of air intake, compression, combustion, and exhaust are repeated as the cycle of the engine. Two stroke engine crank rotation 360 degrees to complete a work cycle, that is, crank rotation, engine combustion work once, it is on the cylinder wall of the scavenging air port, exhaust port to complete the process of intake and exhaust (Figure 2). Four stroke engine crank rotation 720 degrees to complete a work cycle, that is, crank rotation two times, the engine combus