Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Indication or control of braking – acceleration – or deceleration
Reexamination Certificate
2008-07-16
2011-11-08
Keith, Jack (Department: 3663)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Indication or control of braking, acceleration, or deceleration
C303S114100
Reexamination Certificate
active
08055421
ABSTRACT:
It is an object of the present invention to minimize any sensation of inadequate firmness and large changes in deceleration rate with respect to a change in a brake operation force when the force exceeds a boost limit point. A first correlation S1when a brake operation force increases and a second correlation S2after hysteresis is applied at the time of a decrease in the brake operation force are taken as relationships between a brake operation force F and a wheel cylinder pressure PWC in a state wherein an assist hydraulic pressure PA is not applied. An assist hydraulic pressure control section controls the assist hydraulic pressure PA so that when a brake operation force that exceeds a boost limit point T1is applied, the assist hydraulic pressure PA is added, hysteresis is applied when the brake operation force decreases, the assist hydraulic pressure PA decreases, and the relationship between the wheel cylinder pressure PWC and the brake operation force F when the assist hydraulic pressure PA decreases to zero becomes the second correlation S2.
REFERENCES:
patent: 7140699 (2006-11-01), Gronau et al.
patent: 2004/0181381 (2004-09-01), Matsuhashi
patent: 2008/0305932 (2008-12-01), Karnjate et al.
patent: 2006-192945 (2006-07-01), None
Masuda Yoshio
Naito Masayuki
Niino Hiroaki
Advics Co., Ltd.
Buchanan & Ingersoll & Rooney PC
Keith Jack
Khatib Rami
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