Apparatus and method for maintaining braking force of vehicle

Details Apparatus and method for maintaining braking force of vehicle Apparatus and method for maintaining braking force of vehicle

2006-10-16

2010-11-23

King, Bradley T (Department: 3657)

Fluid-pressure and analogous brake systems

Speed-controlled

Odd condition or device detection

C303S192000, C303S089000

Reexamination Certificate

active

07837281

ABSTRACT:
A braking force maintaining apparatus of a vehicle includes a reference braking force setting section, a threshold value setting section, a braking force change rate detecting section, and a change rate determining section. The reference braking force setting section sets, as a reference braking force, a braking force acting on wheels of the vehicle after a reference time has elapsed since stopping of the vehicle. The threshold value setting section sets a threshold value by adding the reference braking force to a predetermined reference value. The braking force change rate detecting section detects a change rate of the braking force acting on the wheels after the threshold value has been set. The change rate determining section determines whether the detected change rate is a negative value. If the detected change rate is a negative value, the reference braking force setting section resets, as the reference braking force, the braking force acting on the wheels after the threshold value has been set, and the threshold value setting section resets the threshold value by adding the reset reference braking force to the reference value.

REFERENCES:
patent: 5979619 (1999-11-01), Rump
patent: 6193332 (2001-02-01), Ono
patent: 6332654 (2001-12-01), Yano
patent: 7401872 (2008-07-01), Kinder et al.
patent: 8-142819 (1996-06-01), None
patent: 10-24817 (1998-01-01), None

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