图2.1 Gasoline engine汽油机

1—crankshaft曲轴；2—intermediate shaft中间轴；3—cylinder block气缸体；4—camshaft凸轮轴；5—camshaft cover凸轮轴罩盖；6—exhaust valve排气门；7—valve spring气门弹簧；8—intake valve进气门；9—tappet气门挺杆；10—cylinder气缸；11—spark plug火花塞；12—flywheel飞轮；13—oil pan油底壳；14—piston活塞；15—connecting rod assembly连杆总成；16—oil strainer集滤器

图2.2 Main accessories of gasoline engine汽油机的主要附件

1—oil pan油底壳；2—pump水泵；3—sealing gasket密封垫；4—cylinder block气缸体；5—distributor分电器；6—gas filter汽油滤清器；7—gas filter installation seat机油滤清器安装座；8—oil filter机油滤清器

图2.3 Operational schematic of single cylinder four-stroke engine单缸四行程汽油机工作原理

1—intake stroke进气行程；2—compression stroke压缩行程；3—power stroke做功行程；4—exhaust stroke排气行程

图2.4 Basic term of engine发动机基本术语

1—top dead center上止点；2—long stroke活塞行程；3—bottom dead center下止点；4—volume of combustion chamber燃烧室容积；5—working volume工作容积