184. ディーゼルエンジン
ディーゼルエンジンは、通常、スパークプラグを使わず、高圧縮した空気の熱で燃料を着火する内燃機関です。そのため圧縮着火式エンジンとも呼ばれます。
低回転域で強いトルクと効率的な燃料利用を得やすく、乗用車、トラック、バス、機械などに使われます。現代のディーゼルエンジンは粒子フィルターや選択触媒還元などで有害排出物を減らします。
How does a diesel engine work?
A diesel engine compresses air inside the cylinder until it becomes very hot. Diesel fuel is then injected into the compressed air and ignites because of the high temperature.
What is the difference between a diesel and petrol engine?
A diesel engine normally uses compression ignition, while a petrol engine normally uses spark plugs to ignite an air-fuel mixture. The two engine types also differ in fuel, combustion characteristics and emissions-control systems.
What emissions can a diesel engine produce?
Diesel engines can produce pollutants including nitrogen oxides and particulate matter or soot. Modern vehicles use systems such as diesel particulate filters and other emissions-control technologies to reduce these pollutants.

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