Fluid-pressure and analogous brake systems – With pump – Pressure control
Patent
1996-05-10
1998-08-11
Graham, Matthew C.
Fluid-pressure and analogous brake systems
With pump
Pressure control
3031134, 3031161, 303DIG3, 303DIG4, B60J 832
Patent
active
057917450
ABSTRACT:
A wheel brake pressure supplying device for supplying fluid pressure for a wheel brake cylinder of a wheel on an automotive vehicle includes a reservoir, a pump, a motor, an accumulator connected to the wheel brake cylinder, a fluid pressure sensor, an electric source, an operation time determining device and a motor control device. The reservoir stores a fluid and the pump is connected to the reservoir for pumping fluid in the reservoir. The motor operates the pump and the accumulator is connected to the pump for storing the fluid pumped by the pump so that fluid pressure in the accumulator increases through operation of the pump. The fluid pressure sensor senses when the fluid pressure in the accumulator is less than a predetermined pressure. The electric source is connected to the motor for supplying voltage to the motor and the operation time determining device determines a target operation time of the motor based on the voltage of the electric source. The motor control device starts the operation of the motor when the fluid pressure in the accumulator is less than the predetermined pressure and terminates the operation of the motor when the operation time of the motor reaches the target operation time.
REFERENCES:
patent: 4914917 (1990-04-01), Schonlau
patent: 5197787 (1993-03-01), Matsuda et al.
patent: 5221125 (1993-06-01), Okochi et al.
patent: 5487593 (1996-01-01), Potts et al.
patent: 5547265 (1996-08-01), Harris et al.
Toyota Crown Majesta, E-JZS149, E-EUZS141, published Oct. 11, 1991, pp. 3-98 through 3-101.
Mazda Service Manual (FAMILIA), published Aug. 1989, pp. P-11 through P-17, P-29.
Aisin Seiki Kabushik Kaisha
Graham Matthew C.
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