The Car and Truck Fleet and Leasing Management Magazine

GM Favors Urea Injection to Clean Up Diesels

September 06, 2005

DETROIT — General Motors is leaning toward an emissions system, urea injection, which enables diesel engines to meet tough pollution standards in place for 2009, according to Automotive News. The technology, also known as selective catalytic reduction, is used on freight-hauling trucks in Europe. However, the EPA questions the use of selective catalytic reduction because the driver must keep the vehicle from running out of urea. If the urea tank runs dry, the driver will notice no difference in performance. But the vehicle won’t meet emissions standards for smog-producing oxides of nitro-gen, or NOx. GM officials say they will decide in the next 12 months whether to install the urea injection system on heavy-duty diesel trucks in North America. The alternative, a filter in the exhaust system called a lean NOx trap, also is being evaluated by GM. The urea injection system works by shooting an ammonia-like acid into the exhaust pipes, reducing NOx. Because engineers need two to three years to design, develop, integrate, test, and validate an emissions system, GM must decide soon which technology it will install, according to the Automotive News report. Starting in 2009, emission standards require diesel engines on heavy-duty trucks to run as cleanly as gasoline engines. If GM doesn’t have a new emission system ready when the tougher rules go into effect, it could cost the company billions of dollars in lost sales on the Silverado and Sierra.
Twitter Facebook Google+


Please note that comments may be moderated. 
Leave this field empty:

Fleet Incentives

Determine the actual cost of owning and running a vehicle in your fleet. Compare vehicles by class and model.


Fleet Tracking And Telematics

Todd Ewing from Verizon Connect will answer your questions and challenges

View All


Fleet Management And Leasing

Jack Firriolo from Merchants will answer your questions and challenges

View All


Fuel Management

Bernie Kanavagh from WEX will answer your questions and challenges

View All


Sponsored by

Union Leasing serves a broad range of small- to mid-size fleets in commercial, industrial and rental car industries.

Read more

Fuel Saving Strategies Survey

View our 2008 survey to benchmark your fleet's fuel and green strategies with other fleets.

Fuel Calculator

A managed fuel program can help you save time and money and gain control over the way you fuel your vehicles. Determine your potential savings by using our fuel calculator.
Launch Fuel Calculator 

Fuel Prices

U.S. Gasoline and Diesel Fuel Prices.

Launch Fuel Prices 

Up Next

More From The World's Largest Fleet Publisher