VEHICLE COAST-DOWN METHOD AS A TOOL FOR CALCULATING TOTAL RESISTANCE FOR THE PURPOSES OF TYPE-APPROVAL FUEL CONSUMPTION

Abstract

A coast-down test is carried out in cases when there is a need for the exact expression of the forces acting on a road vehicle during its coast-down. These forces act mainly against the vehicle's movement due to air and tyre rolling resistance. Knowledge of the course of these forces throughout the vehicle's movement range is also a requirement when measuring fuel consumption with a roller performance dynamometer. The reason is that this device has to load the