Brake apparatus

Fluid-pressure and analogous brake systems – Speed-controlled – With failure responsive means

Reexamination Certificate

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Details

C303S122050, C303S015000

Reexamination Certificate

active

10936484

ABSTRACT:
When a voltage supply to a motor is switched to OFF from ON, a brake fluid pressure control apparatus determines whether a duration of time required for a terminal voltage of the motor to reach a first threshold is shorter than a first predetermined duration of time, and whether a duration of time required for a terminal voltage of the motor to reach a second threshold lower than the first threshold is shorter than a second predetermined duration of time longer than the first predetermined duration of time. Then, when determinations are made that the terminal voltage of the motor reaches the first threshold in the duration of time shorter than the first predetermined duration of time, and that the terminal voltage of the motor reaches the second threshold in the duration of time shorter than the second predetermined duration of time, the voltage supply control portion determines that the motor seizes up and controls the voltage supply to the motor in the seizing-up state.

REFERENCES:
patent: 5290095 (1994-03-01), Wood et al.
patent: 5957549 (1999-09-01), Nagai et al.
patent: 6109879 (2000-08-01), Yamada et al.
patent: 6499813 (2002-12-01), Wandel
patent: 6659568 (2003-12-01), Wandel
patent: 6668634 (2003-12-01), Zimmermann et al.
patent: 6719377 (2004-04-01), Zimmermann et al.
patent: 197-36-752 (1999-02-01), None
patent: 403096469 (1991-04-01), None
patent: B-2513323 (1996-04-01), None
English translation of JP 03096469.
German communication issued from German Patent Office issued on Nov. 14, 2005 for the corresponding German patent application No. 10-2004-046-446.4-21 (English translation thereof).

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