Title:
BRAKE DEVICE AND METHOD FOR DETECTING FLUID LEAKAGE IN BRAKE DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/003539
Kind Code:
A1
Abstract:
Provided are a brake device and a method for detecting fluid leakage in the brake device, with which the precision of detecting the system leaking fluid can be improved irrespective of the extent of the leakage. This brake device is provided with a fluid pressure unit and a control unit. The control unit is provided with: a fluid pressure control part for controlling the operations of a primary system communication valve, a secondary system communication valve, and a fluid pressure source; a first fluid leakage detector that, on the basis of the primary system communication valve and the secondary system communication valve, detects leakage of a brake fluid in both systems when the fluid pressure source has been driven by the fluid pressure control part and the primary system communication valve and secondary system communication valve have been driven to alternately open and close; and a second fluid leakage detector that, on the basis of the primary system communication valve and the secondary system communication valve, detects leakage of the brake fluid in both systems after fluid leakage detection has been performed by the first fluid leakage detector, when the primary system communication valve and the secondary system communication valve have been closed by the fluid pressure control part.
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Inventors:
WATANABE ASAHI (JP)
OOSAWA TOSHIYA (JP)
OOSAWA TOSHIYA (JP)
Application Number:
PCT/JP2017/022241
Publication Date:
January 04, 2018
Filing Date:
June 16, 2017
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
B60T17/22; B60T8/17; B60T8/48
Foreign References:
JP2014151806A | 2014-08-25 | |||
JP2008230355A | 2008-10-02 | |||
JP2012116293A | 2012-06-21 |
Attorney, Agent or Firm:
ONO, Shinjiro et al. (JP)
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