Follow-up on EPA's plans to release urea guidelines in a few weeks
Filed under: Diesel
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Following up on Derrick's post from yesterday, one other option the Environmental Protection Agency (EPA) may use is to require the urea refill interval to be at least as long as the manufacturer's oil change interval, allowing the urea refill to coincide with oil changes.If you missed yesterday's post, it was about diesel engines and how urea selective catalytic reduction systems (SCR) can reduce nitric oxide emissions from the engine's exhaust very effectively. The trouble is that SCRs require the user of the car to be responsible for keeping the on-board urea tank replenished. The EPA plans to issue guidelines for urea SCR systems that could be as drastic as requiring a vehicle to stop running if drivers don't keep the tank filled. Manufacturers are opposing this measure, citing safety issues. While the need to fill an additional tank is clearly a drawback of the urea SCR systems, they allow diesel engine manufacturers to meet the strictest worldwide emissions regulations without fuel economy penalty and at an acceptable price.
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Reader Comments (Page 1 of 1)
8-31-2006 @ 6:07PM
loikll said...
So you can just refill it by taking a piss in the tank, right? The miracle of modern technology.
Reply
8-31-2006 @ 8:18PM
snakesausage said...
Ha... Ha... I would sign up for this to get diesels in the US, just make the car go into limp home mode until you refilled the tank and make a reserve light with about 1000 miles remaining. The EPA must also make the urea very inexpensive and standardize the filling otherwise it will become a dealer only maintenance item and thus very expensive. I really hate to cave on this but I think that there is no option if us diesel lovers without this.
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9-19-2006 @ 4:06PM
gsh said...
Those of us who know that diesel and biodiesel are one major solution to our current transport crisis welcome any methods to introduce clean diesel technology into US markets. The EPA should continue its tough standards because car makers will always try to get around them (e.g. CAFE). But CARB states should temporarily relax their emissions rules to allow new clean diesel cars to be sold and pave the way for the next decade of fuel efficient, carbon neutral, fast and fun vehicles.
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