Motor-driven disk brake system

Details Motor-driven disk brake system Motor-driven disk brake system

2005-03-28

2009-06-02

Siconolfi, Robert A (Department: 3657)

Fluid-pressure and analogous brake systems

Locks

C303S020000, C188S162000, C188S265000, C188S071900

Reexamination Certificate

active

07540571

ABSTRACT:
When a solenoid is operated so as to move an engaging pawl to a disengaged position, if a displacement detection device (an angular position sensor and a controller) detects that a motor rotor has not been displaced by an amount equal to or exceeding a predetermined level, that is, if the motor has not returned by an amount equal to or exceeding the predetermined level within a predetermined time period, a defect in an unlocked condition (an unlocking failure of a park braking lock mechanism) is determined. In this case, a driver is notified of the failure, so that prompt action can be taken to rectify the unlocking failure of the park braking lock mechanism.

REFERENCES:
patent: 5348123 (1994-09-01), Takahashi et al.
patent: 6315092 (2001-11-01), Schwarz
patent: 6626270 (2003-09-01), Drennen et al.
patent: 6854572 (2005-02-01), Usui
patent: 6915883 (2005-07-01), Watanabe et al.
patent: 6959791 (2005-11-01), Usui
patent: 2004/0201270 (2004-10-01), Suzuki et al.
patent: 2004/0212249 (2004-10-01), Yamaguchi et al.
patent: 2002-276704 (2002-09-01), None
patent: 2003-42199 (2003-02-01), None
patent: 2003-222172 (2003-08-01), None
patent: 2004-324856 (2004-11-01), None
Japanese Office Action (in English language) issued Dec. 10, 2009 in Japanese Patent Application No. 2004-149262.

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