Tag Archives | Diesel

VW Emissions Cheat Increases Overall NOx Emissions Quite Negligibly


VW made a brazen move after it realized in 2008 that its small diesel engine could not realistically meet pollution standards in the United States as well as consumer expectation for performance and fuel economy. Someone in the company came up with the idea to design the computer software to only turn on the pollution controls (that greatly reduce engine power) when the front wheels are moving but the back wheels are stationary, cheating a typical emissions test that takes place on a dyno. Other car companies were baffled as to how VW was accomplishing these emission standards. Mazda and Honda for example had not exported their diesel engines to the United States because they were incapable of profitably meeting the emissions standards. Many consumer diesel engine,s for example BMW, meet the standards by actually using a reservoir of urea to reduce engine emissions of NOx gasses at substantial expense to the cost of the car.… Read the rest

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Sweet, Sweet Diesel: Sugar Can Be Used to Create Fuel

Picture: Lauri Andler (CC)

Looks like we may soon look to sugar as a new fuel source. Think it’ll make your car hyper, too?

Via e! Science News:

A long-abandoned fermentation process once used to turn starch into explosives can be used to produce renewable diesel fuel to replace the fossil fuels now used in transportation, University of California, Berkeley, scientists have discovered. Campus chemists and chemical engineers teamed up to produce diesel fuel from the products of a bacterial fermentation discovered nearly 100 years ago by the first president of Israel, chemist Chaim Weizmann. The retooled process produces a mix of products that contain more energy per gallon than ethanol that is used today in transportation fuels and could be commercialized within 5-10 years.

While the fuel’s cost is still higher than diesel or gasoline made from fossil fuels, the scientists said the process would drastically reduce greenhouse gas emissions from transportation, one of the major contributors to global climate change.

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