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一、摩托车汽缸体特点及其技术要求 图1所示为250c.c.摩托车发动机汽缸体。 图1 250cc摩托车发动机汽缸 汽缸体是摩托车发动机的关键零件。形状复杂,壁薄不易成形,技术要求高。缸体外部布有壁薄仅2mm的八片散热片,片间间距为10mm,片形近似圆状,最大外形尺寸为189.5×170mm。带有两个扫气口和两个排气口的汽缸套与铝体铸在一起,两者之间的气口要求对准。包住汽缸套外皮部份铝
First, the motorcycle cylinder block characteristics and technical requirements Figure 1 shows the 250c.c. motorcycle engine cylinder block. Figure 1 250cc motorcycle engine cylinder cylinder engine motorcycle engine is the key components. Complex shape, thin wall is not easy to shape, high technical requirements. Cylinder outside the cloth with thin wall thickness of only 2mm of the eight heat sink, sheet spacing of 10mm, approximately circular disk shape, the maximum dimensions of 189.5 × 170mm. The cylinder liner with two scavenging ports and two exhaust ports is cast with the aluminum body, with the air ports in between requiring alignment. Cover cylinder liner skin aluminum