Motor-driven power steering system for motor vehicle

Details Motor-driven power steering system for motor vehicle Motor-driven power steering system for motor vehicle

1997-05-28

2000-03-07

Swann, J. J.

Motor vehicles

Steering gear

With electric power assist

180443, B62D 504

Patent

active

060327561

ABSTRACT:
A motor-driven power steering system for a motor vehicle implemented inexpensively in a simplified structure allows operation of a steering assist torque generating motor even in the vicinity of a neutral point while preventing rotation of the motor in a direction reverse to the steering direction as well as self-rotation of a steering wheel notwithstanding of occurrence of abnormality in a controller implemented by a CPU. The motor-driven power steering system includes a CPU (3) for controlling a motor (2) in dependence on output of a steering torque detecting unit (1), an interlock means (5) for limiting driving operation of the motor (2) upon occurrence of abnormality in the CPU (3), and a motor driving means (6) for driving the motor (2) in accordance with commands issued by the CPU (3).

REFERENCES:
patent: 5563790 (1996-10-01), Wada et al.
patent: 5720361 (1998-02-01), Nishimoto et al.
patent: 5761627 (1998-06-01), Seidel et al.
patent: 5788010 (1998-08-01), Mukai et al.
patent: 5835872 (1998-11-01), Matsuoka et al.
patent: 5839537 (1998-11-01), Nishino et al.
patent: 5845222 (1998-12-01), Yamamoto et al.

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