12-20-2006, 11:58 PM
[quote Filliam H. Muffman][quote Pat]The whole regeneartion process results in.....more CO2. So, NOx and particulate emissions go down, but CO2 goes up.
If an engine that uses regeneration gets better mileage than one that does not, the total CO2 output per mile has to go down. If you are saying that regeneration engines get worse mileage, do you have some statistics to back that up?
I made no statement about better mileage. I'm only looking at the diesel portion of the engine. Current predictions are for a loss, albeit minor, in mileage compared to the pre 01/07 engines. While used in a hybrid, the total package may get more mileage, but the diesel portion itself may get less than before.
Then again, no one really knows 100%. The only people using ULSD right now are in engines that were not designed for it. Those engines that were designed for it have not hit the market.
As for statistics yes. I'll look around, this has been discussed ad nauseum in forums dedicated to diesel trucks, both big and small. Cat, Detroit, Navistar have all released tech notes on expected performance and issues arising from the new emissions and fuel.
If an engine that uses regeneration gets better mileage than one that does not, the total CO2 output per mile has to go down. If you are saying that regeneration engines get worse mileage, do you have some statistics to back that up?
I made no statement about better mileage. I'm only looking at the diesel portion of the engine. Current predictions are for a loss, albeit minor, in mileage compared to the pre 01/07 engines. While used in a hybrid, the total package may get more mileage, but the diesel portion itself may get less than before.
Then again, no one really knows 100%. The only people using ULSD right now are in engines that were not designed for it. Those engines that were designed for it have not hit the market.
As for statistics yes. I'll look around, this has been discussed ad nauseum in forums dedicated to diesel trucks, both big and small. Cat, Detroit, Navistar have all released tech notes on expected performance and issues arising from the new emissions and fuel.