To maintain good fuel efficiency, engineers design diesels to run lean, but the consequent increased availability of oxygen promotes the formation of NOx during fuel combustion.

 
  • 為維持較佳的省油效果,工程師會(huì )將柴油引擎設計成在稀油狀態(tài)下運轉,但如此一來(lái),氧含量提高,在燃料燃燒時(shí)會(huì )促使氮氧化物形成。
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