文档介绍：专业外文翻译材料

系别南京机电学院
专业汽车检测与维修技术
班级汽修 1003
学生姓名岳祥龙
学号
指导教师张锦龙
2013年4月
目录
第一部分专业外文翻译材料原文…………………………………………………1
第二部分专业外文翻译材料译文…………………………………………12
参考文献…………………………………………………………………………21

专业外文翻译材料原文
Engines
Cylinder Block
The cylinder block is the largest past of the upper section carries the cylinders and ,the lower section forms the crankcase,and supports the can be cast in one piece from grey it can be alloyed with other metals like nickel or chromium.
The iron casting process begins by making up the shapes of what will e water jackets and cylinders as sand cores which are fitted into stops there parts ing solid iron during iron is poured into sand moulds that are formed by patterns in the shape of the block.
After casting,core sand is removed through holes in the sides and ends,leaving spaces for the cooling and lubricant holes are sealed with casting is then are bored and finished,surfaces smoothed,holes drilled and threads cylinder blocks are made with ribs,web and fillets to provide rigidity but also keep weight to a minimum.
Cylinder Block Construction
As more manufacturers try to make vehicles lighter and more fuel efficient,more and more engine blocks are being cast from block made of aluminium alloy is lighter than if it were made of cast if two engines are generating the same power,the alloy version would have a better weight-to-power ratio than the cast alloy alloy blocks are made by various casting processes,including pressure method is gravity casting,where the molten metal is poured into molds.
Cast iron liners are usually used in the cylinders of aluminium blocks,and sometimes in cast-iron sleeves are cast into the on the outside form a key that stops any movement in the also increase surface area to assist heat tran