Some Experiments in Diesel Engine Net Power Rating

Abstract

The paper presents an analysis of the measurement of combustion engine net power in the process of certification according to requirements of the UN ECE 85 Regulation. The influence of some factors affecting power declaration such as atmospheric conditions and admitted auxiliaries are discussed. A road vehicle diesel engine has experimented on the dynamometric bench at dissimilar atmospheric factors (barometric pressure, atmospheric temperature, and humidity). Some comments were made on the relationship between gross and net power as well as on error analysis.