Patent ID: 11867246
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  B | IPC B  F

Claim 5:
6. A wear volume estimation method that estimates a wear volume of a brake pad of a vehicle, wherein a wear volume function expresses the wear volume as a function of a vehicle speed, a brake pressure, and a brake duration,
the wear volume estimation method comprising:
an information acquisition process acquiring information on the vehicle speed, the brake pressure, and the brake duration, during braking of the vehicle;
a wear volume calculation process calculating the wear volume according to the vehicle speed, the brake pressure, and the brake duration by using the wear volume function;
a temperature estimation process estimating a temperature of a contact surface of the brake pad that comes in contact with a brake rotor, based on the vehicle speed, the brake pressure, and the brake duration; and
a temperature history management process updating temperature history information indicating at least a temperature history of the contact surface, based on the temperature of the contact surface, wherein
the wear volume calculation process includes a process of variably setting the wear volume function according to the temperature history of the contact surface indicated by the temperature history information acquired at a time of previous braking.