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.
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。
The key technologies to lower the exhaust emission, included the in-cylinder control, exhaust gas recirculation, variable geometry turbo, 4-valve, common rail and after-treatment are presented.
阐述了降低排放的关键技术，包括缸内控制、废气再循环、可变涡轮增压、4气阀、共轨和排气后处理技术。
A check valve exhaust gas recirculation (EGR) system, which makes effective use of intake and exhaust pressure waves, was proposed for turbocharged diesel engines.
提出了采用单向阀利用进排气压力波动的废气再循环(EGR)系统。
A check valve exhaust gas recirculation (EGR) system, which makes effective use of intake and exhaust pressure waves, was proposed for turbocharged diesel engines.
提出了采用单向阀利用进排气压力波动的废气再循环(EGR)系统。
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