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Vehicle braking system and method of operating it

A technology of vehicle braking and braking, which is applied in the direction of electric braking system, braking action starting device, brake, etc., and can solve the problems of reducing friction coefficient and so on

Active Publication Date: 2016-05-11
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some cases the increased and / or decreased coefficient of friction is noticeable to the driver and therefore undesirable

Method used

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  • Vehicle braking system and method of operating it
  • Vehicle braking system and method of operating it
  • Vehicle braking system and method of operating it

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Embodiment Construction

[0033] The vehicle braking systems and methods described herein are designed to improve the driver's braking experience by counteracting the effects that humidity and temperature may have on braking performance. According to one embodiment, the method determines whether a braking event is in progress, and if so, it measures one or more braking conditions, such as humidity and temperature. With this information, the method is able to adjust or compensate for variations in the coefficient of friction (μ) that may occur in brake components such as brake pads or rotors, and provide a modified brake command signal accordingly. This results in an improved braking experience, especially during the first few friction braking events after a long period of time when the vehicle is stationary and moisture builds up on the brake components.

[0034] Although the exemplary method is described herein in the context of a brake-by-wire system, such as an electro-hydraulic brake (EHB) system o...

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Abstract

The present invention relates to vehicle braking systems and methods of operating the same. A vehicle braking system and method designed to improve the driver's braking experience by counteracting the effects that humidity and temperature may have on braking performance. According to one embodiment, the method determines whether a braking event is in progress, and if so, measures humidity and brake temperature. With this information, the method is able to compensate for anticipated variations in the coefficient of friction of one or more brake components, such as brake pads or rotors, and provide a modified brake command signal accordingly.

Description

technical field [0001] The present invention relates generally to vehicle braking systems and, more particularly, to methods of operating vehicle braking systems under various temperature, humidity, and / or other conditions. Background technique [0002] There are numerous types of vehicle braking systems, including vehicle braking systems that include hydraulically actuated disc brakes. In such systems, engagement of the brake pedal by the driver causes hydraulic pistons to actuate calipers outwardly toward the wheels, which clamp a rotor between a pair of brake pads. The caliper carries brake pads that frictionally interact with the rotating rotor and slow it down according to several factors including the material's coefficient of friction (μ). [0003] The coefficient of friction (μ) of the brake pad and / or rotor may be affected by the temperature of the system as well as the humidity of the surrounding atmosphere. When the vehicle is left standing in high humidity for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T17/00
CPCB60T1/10B60T7/042B60T8/171B60T13/586B60T13/662B60L3/0061B60L7/12B60L7/26B60L15/2009B60L2210/40B60L2220/12B60L2220/16B60L2240/12B60L2240/36B60L2240/421B60L2240/423B60L2240/461B60L2240/662B60L2240/667B60L2250/26B60L2260/44Y02T90/16B60L50/62B60L50/16B60L50/51B60L50/52Y02T10/62Y02T10/64Y02T10/72Y02T10/7072Y02T10/70
Inventor J.D.法兰P.J.蒙塞尔B.C.彭纳拉
Owner GM GLOBAL TECH OPERATIONS LLC