1 479Q 汽油机气缸体总成设计摘要主要阐述了汽油机缸体各部分设计的要求、方法及其在479 气缸体设计中的应用。对缸体重要表面的尺寸、 几何形状、 相互位置提出了严格的公差要求。在结构设计中通过采用龙门式缸体结构、 合金铸铁材料以及结构细节的设计来保证其有足够的强度和刚度，尤其是有足够的刚度。还特别注减轻其质量，改善铸造和加工工艺性，以求尽量降低成本。关键词：汽油机 ,缸体,设计2 The Design of 479Q Gasoline Engine Block Assembly Abstract This thesis is concerned with the request and approach of each part of the engine cylinder block in design as well as the use of the 479QA cylinder bloc k‘s design. It presents strict tolerance in the principal surface size, geometry and mutual position. When designing, it has sufficient intensity and rigidity, especially the latter. It satisfies the need by adopting these means -the material of the cast -iron of alloy, detailed design of structure etc. The thesis focuses on reducing the cost by means of reducing the quantity, improving foundry and processing. Key words: gasoline engine, cylinder block;,design 3 目录摘要 ........................................................................................................................................................ 1 Abstract .................................................................................................................................................. 2 第一章概述 .......................................................................................................................................... 51.1 气缸分类 ...................................................................................................................................... 51.2 气缸体冷却方式.......................................................................................................................... 61.3 气缸数量 ..........................................
