Methods of testing internal combustion engines (ICEs) according to GOST (State Standard) 18 509–88, 10 448–2014, and 14 846–2020 are analyzed. It is established that the allowable measurement error in these standards relates to the nominal controlled value, while there are no requirements for the permissible measurement error of power. The results of calculations according to GOST standards for allowable measurement errors of torque, shaft rotating frequency, and power for engines of different brands are presented. It is established that using measuring instruments with an error close to that recommended in the standards can lead to errors of the first and second kind in power control during engine testing. To improve measurement accuracy during ICE testing, it is recommended to use tolerance control theory to standardize the allowable error of controlled parameters.
Leonov et al. (Wed,) studied this question.