EPAs Clean Diesel Engine Goes Commercial
12 May 2004
Crains Chicago Business reports that Navistar will be the first manufacturer to try a clean diesel engine approach developed by none other than the Environmental Protection Agency.
An announcement of an agreement between the government and Warrenville-based International is scheduled for Thursday in Chicago. Others will likely follow. One is expected to be with a car company, says a knowledgeable EPA official, who asked not to be named.
The agencys hope is that the companies will take the technology from the lab and put it in a truck, the official adds.
Advance notices of the Thursday announcement say the EPA and International are forming a testing and development partnership.
This describes the highlights of the EPAs approach to clean diesel. The basic approach is a series of design changes to the diesel engine, which reduce NOx emissions in the engine combustion chamber without penalizing engine efficiency.
EPA Fuel System – Uses a hydraulically intensified fuel system to lower PM and smoke emissions, and to improve engine efficiency.
Boost System – Increases the engine power and the efficiency of the combustion process, thus reducing emissions and increasing fuel economy.
Low Pressure Exhaust Gas Recirculation (EGR) – Lowers the peak combustion temperature to reduce the formation of NOx.
PM Aftertreatment – Reduces the remaining smoke, unburned hydrocarbons (HC) and carbon monoxide in the exhaust to levels required for future emissions standards.