What is a Diesel Vehicle?

What Is A Diesel Vehicle?

A diesel vehicle uses an engine that has a different combustion cycle than a gasoline engine. In a gasoline engine, fuel is mixed with air, drawn into the cylinder, and ignited by a spark plug. In a diesel, air is drawn into the cylinder and compressed first without fuel present. This compression heats the air to such a high temperature that when fuel is then injected into the cylinder, it combusts. By using higher compression ratios and higher combustion temperatures, diesels operate more efficiently. As a result, diesel vehicles attain better fuel economy than their gasoline counterparts. In addition, a gallon of diesel fuel contains about 10 percent more energy than a gallon of gasoline. These two factors help modern diesels achieve roughly 50 percent higher fuel economy than their gasoline counterparts. Diesel vehicles now account for nearly half of all new vehicle sales in Europe, and a small but growing market share in the US.

Diesel Benefits

  1. Higher fuel economy (20-40 percent more than gasoline)
  2. Diesel engines last longer, and fetch higher resale values
  3. Diesel engines can be run on biofuel (biodiesel)
  4. Diesels provide greater torque; great for rapid acceleration and towing
  5. Driving range on a tank is longer

Diesel Drawbacks

  1. Diesel fuel is more expensive in the US (In Europe, it’s taxed less heavily.)
  2. Few models are available with a diesel engine
  3. Diesel fuel is available at about half of all service stations
  4. Diesel vehicles are usually more expensive
  5. Particulate matter and NOx tailpipe emissions are usually higher

From: http://www.hybridcars.com/diesel-efficient-cars


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