活塞行程  piston stroke

　　长行程  long stroke

　　上行程  up stroke

　　下行程  down stroke

　　进气行程  intake stroke

　　充气行程  charging stroke

　　压缩行程  compression stroke

　　爆炸行程  explosion stroke

　　膨胀行程  expansion stroke

　　动力行程  power stroke

　　排气行程  exhaust stroke

　　膨胀换气行程  expansion-exchange stroke

　　换气压缩行程  exchange-compression stroke

　　止点  dead center

      上止点  top dead center(upper deadcenter)

　　下止点  lower dead center(bottom dead center)

　　上止点前  budc(before upper dead center)

　　上止点后  atdc(after top dead cetner)

　　下止点前  bbdc(before bottom dead center)

　　下止点后  abdc(after bottom dead center)

　　缸径  cylinder bore

　　缸径与行程  bore and stroke

　　空气室  energy chamber

　　气缸余隙容积  cylinder clearance volume