초록 ▼

A method relating driver perceived control of a vehicle to the quantitative measurements of the handling characteristics of a vehicle/tire combination. The steady-state handling characteristics of a vehicle are obtained by driving the vehicle at substantially negligible tire slippage. These characte

A method relating driver perceived control of a vehicle to the quantitative measurements of the handling characteristics of a vehicle/tire combination. The steady-state handling characteristics of a vehicle are obtained by driving the vehicle at substantially negligible tire slippage. These characteristics provided the reference data which can be used to predict the manner in which a vehicle/tire combination will perform under test conditions. The difference between the actual measured response of the vehicle and the predicted response of the vehicle provides the basis for determining if the vehicle was in driver perceived oversteer or driver perceived understeer.

대표청구항 ▼

A method of determining the handling characteristics of tires comprising the steps of: (a) accumulating vehicle response reference data of a vehicle at negligible tire slippage for either steer angles or steering wheel angles, said vehicle response reference data including at least one of the latera

A method of determining the handling characteristics of tires comprising the steps of: (a) accumulating vehicle response reference data of a vehicle at negligible tire slippage for either steer angles or steering wheel angles, said vehicle response reference data including at least one of the lateral acceleration and yaw velocity; (b) inputting and storing the vehicle response reference data of step (a) into a computer and determining the relationship between the vehicle response reference data and either the steer angles or steering wheel angles; (c) accumulating, for a particular set of tires, vehicle response test data of said vehicle driven through a maneuver, series of maneuvers or a course, at various longitudinal velocities, and in excess of the negligible tire slip for at least a portion of said maneuver, series of maneuvers or said course and wherein said vehicle response test data includes at least one of said lateral acceleration and said yaw velocity; (d) inputting and storing the data of step (c) into a computer; (e) determining with the aid of said computer and the relationship of step (b) predicted vehicle response reference data, including at least one of the predicted lateral acceleration and predicted longitudinal velocity; and (f) comparing said predicted reference data of step (e) to said test data of steps (c) and (d) to determine the O-steer and U-steer of said set of tires.