Pump drive motor control apparatus

Details Pump drive motor control apparatus Pump drive motor control apparatus

2006-04-04

2006-04-04

Torres, Melanie (Department: 3683)

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

C303S003000, C303S011000, C303S020000

Reexamination Certificate

active

07021725

ABSTRACT:
A pump drive motor control apparatus is applied to a motor for driving a hydraulic pump which supplies to a hydraulic circuit the brake fluid returned to a reservoir as a result of ABS control. When a motor inter-terminal voltage becomes equal to or less than a voltage threshold in a period during which a motor control signal is at a low level (supply of electricity to the motor is stopped), the control apparatus changes the motor control signal to a high level (resumes the supply of electricity) for a predetermined time, to thereby control the rotational speed of the motor. When the cause of the start of ABS control is not a demand for excessively abrupt braking, the voltage threshold is lowered to reduce the rotational speed of the motor during a predetermined period of time immediately after the start of ABS control.

REFERENCES:
patent: 5704766 (1998-01-01), Fennel et al.
patent: 6135577 (2000-10-01), Ishii
patent: 6299260 (2001-10-01), Hachtel
patent: 6499813 (2002-12-01), Wandel
patent: 6709067 (2004-03-01), Schmitt et al.
patent: 8-501614 (1996-02-01), None
patent: 2000-313325 (2000-11-01), None
patent: 2002-506406 (2002-02-01), None
patent: WO 99/55566 (1999-11-01), None

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