Modeling the effect of engine assembly mass on engine friction and vehicle fuel economy

Conference · Thu Jun 01 00:00:00 EDT 1995

OSTI ID:79753

An, Feng ^[1]; Stodolsky, F ^[2]

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1. University of California, Riverside, CA (United States)
2. Argonne National Lab., IL (United States)

In this paper, an analytical model is developed to estimate the impact of reducing engine assembly mass (the term engine assembly refers to the moving components of the engine system, including crankshafts, valve train, pistons, and connecting rods) on engine friction and vehicle fuel economy. The relative changes in frictional mean effective pressure and fuel economy are proportional to the relative change in assembly mass. These changes increase rapidly as engine speed increases. Based on the model, a 25% reduction in engine assembly mass results in a 2% fuel economy improvement for a typical mid-size passenger car over the EPA Urban and Highway Driving Cycles.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 79753
• Report Number(s): ANL/ES/CP-85239; CONF-950256-10; ON: DE95012936
• Resource Relation: Conference: Society of Automotive Engineers international congress and exposition, Detroit, MI (United States), 27 Feb - 2 Mar 1995; Other Information: PBD: [1995]
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
MACHINE PARTS
WEIGHT
INTERNAL COMBUSTION ENGINES
FUEL CONSUMPTION
MECHANICAL TRANSMISSIONS
PISTONS
SHAFTS
GEARS