1996-02-01

Evaluation of IMEP Routines and Analysis Errors 960609

This paper addresses issues associated with the accurate determination of indicated mean effective pressure (imep) for internal combustion engines. Items covered include a comparison of alternative imep equations and the effects of crank angle resolution, signal noise, thermal shock, crank angle phasing and connecting rod length errors. The best imep equation to use has been identified and the magnitude of errors under a wide range of conditions quantified. The results show that inaccuracy in the calculated imep will mainly be caused by thermal shock and errors in the crank angle phasing and transducer sensitivity. In contrast, the effects of coarse crank angle resolution, incorrectly specified connecting rod length, signal noise and integration period error should be relatively small.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Evaluation of Burn Rate Routines and Analysis Errors

970037

View Details

TECHNICAL PAPER

D.I. Diesel Engine In-Cylinder Pressure Data Analysis Under T.D.C. Setting Error

930595

View Details

TECHNICAL PAPER

Thermodynamic Determination of T.D.C. in Piston Combustion Engines

960610

View Details

X