Fluid-pressure and analogous brake systems – Speed-controlled – Electric control circuit detail
Reexamination Certificate
2008-06-03
2008-06-03
King, Bradley T (Department: 3683)
Fluid-pressure and analogous brake systems
Speed-controlled
Electric control circuit detail
C303S122050, C303S122080, C324S548000
Reexamination Certificate
active
07380891
ABSTRACT:
A power supply apparatus for a vehicle. An electronic controller outputs information for controlling braking of a vehicle. A battery supplies electric power to a brake via the electronic controller. A power supply backup unit as an auxiliary power supply includes a capacitor unit formed of a plurality of capacitors and a detection unit for detecting an abnormality in the capacitor unit, and supplies electric power to the brake when the battery is in an abnormal state. In charging or discharging the capacitor unit, the detection unit measures an internal resistance value of the capacitor unit, and measures an internal capacitance value from the rate of change of voltage per unit time. The detection unit judges whether or not the capacitor unit is in a normal state based on the internal resistance value and the internal capacitance value.
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International Search Report for application No. PCT/JP2004/009686 dated Sep. 21, 2004.
Mitani Yousuke
Ohashi Toshihiko
King Bradley T
Matsushita Electric - Industrial Co., Ltd.
RatnerPrestia
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