Lesson 5, Topic 2
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Diesel Powered Vehicles

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Diesel engines are compression ignition engines; they do not have spark plugs. When thinking of diesel, a medium or heavy-duty truck might come to mind. Diesel powered specialty vehicles (e.g., garbage trucks, school buses, and fire engines) and semi trucks pulling trailers are very common.

Ford F-650 Medium Duty (Courtesy of Ford Motor Company)

Passenger Vehicles

Diesel engines have also become popular in light trucks. Recently in the United States there has been a resurgence of diesel powered cars. In Europe, diesel powered cars are fairly common, making up about one-half of new cars.

Diesel Fuel

Diesel fuel has more energy per gallon as compared to gasoline, making it more efficient for every gallon of fuel burned. Diesels emit NOX and particulate matter (PM), in addition to greenhouse gas pollutants. Ultra-low sulfur diesel and newer engine and emission systems have greatly decreased emissions.

Diesel Fuel Dispenser
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