On an Improved Dynamometer Measuring Technics and OLS-Method

Heavy lorries and trailer combinations cause many serious traffic accidents. Improvements in inspection methods of brake systems increase traffic safety. In Finland dynamometer measurements have been used since 1960's, and its advantages are stable measuring conditions, high repetability and short inspection time. Braking force on the wheel periphery generated by the wheel brakes is measured in the roll set of the dynamometer with the help of a power measurement device connected to it. In the vehicle inspection and in the brake repair shops, the estimation of the braking ability of vehicles based on calculated definitions of the performance of the brakes and the retardations to be achieved carried out on the basis of braking forces measured with the dynamometer. The Finnish Ministry of Transport and Communications and the