Automotive anti-lock control system

Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Indication or control of braking – acceleration – or deceleration

Reexamination Certificate

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Details

C701S078000, C303S156000, C303S157000

Reexamination Certificate

active

06950738

ABSTRACT:
An anti-lock controller controls the brake fluid pressure of a wheel brake to a pressure decreasing mode where a normally-opened electromagnetic valve is closed while a normally-closed electromagnetic valve is opened, a holding mode where the normally-opened electromagnetic valve is closed and the normally-closed electromagnetic valve is closed, and a pressure increasing mode where the normally-opened electromagnetic valve is opened while the normally-closed electromagnetic valve is closed. Then, in a duty pressure increasing mode which is corresponds to the pressure increasing mode, values of predetermined values D1, D2which put a current value to be applied to the normally-opened electromagnetic valve in a relationship such as 100>D1>D2>0 if in the pressure decreasing mode, a current value resulting when the normally-opened electromagnetic valve is continuously turned on is 100, while a current value resulting when the normally-opened electromagnetic valve is turned off is 0 are repeated at predetermined time intervals.

REFERENCES:
patent: 5171070 (1992-12-01), Okazaki et al.
patent: 5660449 (1997-08-01), Higashimata et al.
patent: 5746487 (1998-05-01), Naito et al.
patent: 5890777 (1999-04-01), Naito et al.
patent: 5938298 (1999-08-01), Naito et al.
patent: 2004/0135427 (2004-07-01), Inagaki et al.
patent: 5-50903 (1993-03-01), None
patent: 09-104335 (1997-04-01), None
patent: WO 94/10016 (1994-05-01), None

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