Quote:
Originally Posted by GreenHornet
The Urea injection systems used now a days on the larger diesel rigs are fairly maintenance free just change out the Urea every 5,000 miles or so and you are good similar to an oil change but much easier. All you have to do is just buy the Urea and open the cap and poor it in like windshield washer fluid. The GM cars are set up to come to a steady crawl if the Urea is not replenished  So if you ignore the on board diagnostics the car will only go about 15mph LOL!
With a small displacement diesel and set up properly you may not even need the Urea injection or you could use a better solution inexpensive water/methanol injection. Water injection has been known for many years to help reduce particulates can't get much cheaper than this!
If you are driving in the urban areas you may not even have to run the diesel much if it is a plug in electric hybrid which most all manufacturers are moving to anyways.
You are correct on the 7 mi point! It takes time for any engine to warm up to operating temps and diesels like to run hard. So this is part of the reason performance will suffer. Most all vehicles today are lightly loaded so this further compounds the issue. A hybrid allows you to minimize this downfall. You can purposely downsize the diesel engine while the electric can be sized for the heavy starting and acceleration demands. |
Mazda's Skyactiv-D engine is able to meet the requirements WITHOUT urea injection. They do it by using low compression.