Method of estimating brake pad wear and vehicle having a controller that implements the method

A technology of brake pads and brake rotors, applied in the direction of brake types, vehicle components, brake safety systems, etc., which can solve the problems of inconvenient inspection of brake pads and prolonged parking time.
CN105599751AActive Publication Date: 2016-05-25GM GLOBAL TECH OPERATIONS LLC
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
GM GLOBAL TECH OPERATIONS LLC
Publication Date
2016-05-25

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Abstract

A method of estimating brake pad wear includes determining required braking energy to be dissipated by a braking system as a fraction of total kinetic energy according to an energy partitioning model. The required braking energy is distributed to vehicle braking mechanisms according to a vehicle dynamics model. Rotor temperature of each brake rotor may be determined according to a rotor temperature model that utilizes the required braking energy and the distribution of the required braking energy, and determining brake pad wear of each brake pad according to a brake pad wear model that utilizes the rotor temperature and the distributed required braking energy. A first brake pad wear model is implemented under first operating conditions, and a second brake pad wear model under second operating conditions. The brake pad wear is indicated via a brake pad wear indicator output device. A vehicle has a controller that implements the method.
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Description

technical field

[0001] The present teachings generally include a method of estimating brake pad wear and a vehicle having a controller implementing the method. Background technique

[0002] Brake pad life testing has been implemented on vehicles in a number of ways. Some vehicles have a mechanical sensor that provides an audible sound that contacts the brake rotor when brake pad wear is evident. Some vehicles have an electronic sensor that provides a single signal when the brake pad wear reaches a predetermined amount of wear, and the electronic sensor indicates this signal to the vehicle operator as a message in a vehicle information center accessible on the dashboard or steering wheel. Percentage of brake pad life remaining. More advanced wear life algorithms estimate brake pad wear based on estimated rotor temperatures associated with typical driving conditions required for relatively low braking energy.

[0003] Certain vehicle owners occasionally or routinely exhibit...

Claims

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