结果表明，通过调节排气门关闭正时，适当增大缸内残余废气量，可显著改善起动过程初始着火循环的着火燃烧性能和提高起动过程缸内燃烧的稳定性。
The results show that a proper increase of residual gas fraction could promote ignition and combustion stability of first firing cycle significantly during cold start.
推荐可变压缩比（VCR）方案、可变废气再循环率（EGR）方案、可变排气门关闭时刻方案，以及废气再循环滚流分层充气方案等。
Schemes of variable compression ratio (VCR), variable exhaust gas recirculation (EGR), variable exhaust valve timing, and EGR with stratification by tumble charge flow are recommended.
进气和排气的气门开合时间随着转速的提高相互交叠，循环着将废气排出。
The intake and exhaust valve opening times will overlap as RPMs rise, recycling some of the charge the outgoing air creates.
作功冲程耗尽了所有的气体，这样就必须采取相应的措施排出废气以及向气缸内再充入新鲜的可燃混合气：气体的运动由气门来控。
The power stroke "uses up" the gas, so means must be provided to expel the burnt gas and recharge the cylinder with a fresh petrol-air mixture: this control of gas movement is the duty of the valves;
活塞的上行通过排气门将废气排出汽缸外。
As the piston travels upward, it pushes the spent gases out through the open exhaust valve.
活塞的上行通过排气门将废气排出汽缸外。
As the piston travels upward, it pushes the spent gases out through the open exhaust valve.
应用推荐