Patent ID: 6269289
Filing Date: 2001-07-31
Classification: B60W

Abstract:
A process of forming a value of standard resistance for an automotive vehicle, the automotive vehicle having driving wheels, each having a tire, and a power train including an engine, the process comprising:operating the engine to keep the automotive vehicle rolling over the surface of a flat road having 0% gradient in steady running state at each of a predetermined number of reading points of vehicle speed;sensing operating parameters indicative of operating conditions of the power train during operating the engine to keep the automotive vehicle rolling over the surface of the flat road in steady running state at each of said predetermined number of reading points of vehicle speed;deriving a value of driving torque produced by the power train from said sensed operating parameters at each of said predetermined number of reading points of vehicle speed;setting said derived values of driving torque as known standard resistance values at said predetermined number of reading points of vehicle speed, respectively; andconducting linear interpolation, in determining a value of standard resistance at a reading point of vehicle speed in the domain between the adjacent two of said plurality of reading points of vehicle speed, between said known standard resistance values at the adjacent two reading points of vehicle speed.