Measurement of combustion engine power characteristics, correction factors

Abstract

This article primarily focuses on the measurement of combustion engine power characteristics and the issues of repeatability and comparability of measurements, including a particular adjustment of the SuperFlow SF-902 measurement system. The repeatability of measurements is influenced by a sum of variables which cannot be easily stabilized. Therefore, standardization institutions have developed sets of correction factors to unify the power characteristics measurements. Also, the correction factors are important for the comparability and repeatability of measurements. For this reason, the article also includes a brief description of the correction factor function and the issues concerning the extension of correction functions with the SuperFlow SF-902 motor brake. The SF- 902 hydrodynamic motor brake is part of equipment owned by the Laboratory of Engine Testing and Dynamic Testing of Automotive Structural Groups, Institute of Progressive Technologies for Automotive Industry in Ostrava (hereinafter the “IPTAI”).