The key to an EGR system is introduced, and the control of exhaust gas quantity recirculation quantity of that in every point at best.

EGR系统的关键就是控制废气的引入量，使废气的再循环量在每一个工作点都达到最佳状况。

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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。

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The blade-type swirlers have been used in many air engine combustors to control the primary airflow of flame tube and establish a strong recirculation zone.

航空喷气发动机燃烧室中广泛采用叶片涡流器来控制火焰筒的一次空气流量，并建立强回流区。

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Fab 15 will be TSMC's next "green fab" following Fab 12 and Fab 14, incorporating green concepts in energy conservation and pollution control in its design, including a process water conservation rate of 85%, reclamation of rainwater, recirculation and reuse of general exhaust heat, and development of solar power generation and LED lighting applications.

ENGADGET: TSMC begins construction of new $9.3b foundry, wants to sate our constant hunger for chips