Vehicle electro-hydraulic power steering unit

Details Vehicle electro-hydraulic power steering unit Vehicle electro-hydraulic power steering unit

2007-01-16

2007-01-16

Zanelli, Michael J. (Department: 3661)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Vehicle subsystem or accessory control

C180S443000

Reexamination Certificate

active

10975531

ABSTRACT:
A vehicle electro-hydraulic power steering unit includes: a steering mechanism steering a steering wheel in a steering direction; an electro-hydraulic pump; a piston mechanism assisting the steering mechanism in a steering direction; a hydraulic circuit causing an assist force to be generated in response to the steering of the steering mechanism; and a control unit controlling a motor based on an output signal from a vehicle speed sensor, a torque sensor, and a steering angle sensor. In this power steering unit, driving the motor is started when a steering torque exceeds a set torque threshold, and the torque threshold to be set is changed depending on operating conditions. Thus, a vehicle electro-hydraulic power steering unit improved in fuel consumption is obtained.

REFERENCES:
patent: 5307895 (1994-05-01), Duffy
patent: 5513720 (1996-05-01), Yamamoto et al.
patent: 6069460 (2000-05-01), Grabowski et al.
patent: 6298941 (2001-10-01), Spadafora
patent: 6427104 (2002-07-01), Matsushita et al.
patent: 6725963 (2004-04-01), Gaunt et al.
patent: 4241785 (1994-06-01), None
patent: 63-25178 (1988-02-01), None
patent: 4-95574 (1992-03-01), None
patent: 5-270425 (1993-10-01), None

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