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

Claim 0:
1. A wear volume estimation device that estimates a wear volume of a brake pad of a vehicle,
the wear volume estimation device comprising:
a processor; and
a storage configured to store information on a wear volume function that expresses the wear volume as a function of a vehicle speed, a brake pressure, and a brake duration, wherein
the processor is programmed to execute:
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, and

in the wear volume calculation process, the processor variably sets 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.