System and method of evaluating performance of vehicle device having friction component
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorSung Hyun Cho
Life of this patent
Estimating the term…
Abstract
A system and method of accurately evaluating the performance of a vehicle device having a friction component, including a brake disc, a clutch disc, or the like, may be achieved by predicting the accurate friction coefficient of the friction component in consideration of changes in the temperature, rotation speed, and hydraulic pressure of the friction component, and determining the operating torque of the vehicle device or system having the friction component through reflecting the predicted friction coefficient, during the performance evaluation simulation process of the vehicle device including the friction component.
Claims18
A system for evaluating performance of a vehicle device having a friction component, the system comprising:
- a rotation speed determination unit configured to determine a rotation speed of the friction component of the vehicle device;
- a hydraulic pressure determination unit configured to determine a hydraulic pressure acting on the friction component;
- a temperature determination unit configured to determine a temperature of the friction component;
- a friction coefficient modeling unit configured to predict and output a friction coefficient on a basis of three or more input values, including the rotation speed determined by the rotation speed determination unit, the hydraulic pressure determined by the hydraulic pressure determination unit, and the temperature of the friction component determined by the temperature determination unit;
- and
- a torque determination unit configured to determine an operating torque of the friction component using the friction coefficient output from the friction coefficient modeling unit,
- wherein the friction coefficient modeling unit is configured to construct and output a map of friction coefficients determined on a basis of input values including a variation in the rotation speed of the friction component, a variation in the hydraulic pressure acting on the friction component, and a variation in the temperature of the friction component.
A method of evaluating performance of a vehicle device having a friction component, the method comprising:
- determining a rotation speed of the friction component;
- determining a hydraulic pressure acting on the friction component;
- determining a temperature of the friction component;
- predicting and outputting, by a controller, a friction coefficient matching the determined rotation speed, the determined hydraulic pressure, and the determined temperature of the friction component;
- and
- determining an operating torque of the friction component using the output friction coefficient,
- wherein the method further includes constructing and outputting a map of friction coefficients determined on a basis of input values including a variation in the rotation speed of the friction component, a variation in the hydraulic pressure acting on the friction component, and a variation in the temperature of the friction component.
Dependencies are inferred from the claim text.