proven technology
needs and criteria of a B + heavy duty engine market
fuel economy
cost versus benefit prediction
integration possibilities in industry fabrication standards
reduced emissions
An additional indirect advantage lies in reducing overall emissions through the fuel savings benefits. Overall emissions reductions of industries such as commercial trucking is a step toward public awareness and demand of clean air and the economical interests of market and industry efficiency. Further, reducing emissions in diesels usually requires adjusting engine parameters (such as injection timing) that result in fuel economy deterioration. The small inherent emission reduction of the RLE due to the reduced fueling rate for the same level of power will recover some of this lost efficiency, in addition to the direct improvement through friction reduction. 2003 emission levels require the use of EGR (Exhaust gas recirculation), which is known to increase the wear rate of the engine.