Linear drive electric assist steering system

Details Linear drive electric assist steering system Linear drive electric assist steering system

1996-07-24

1999-07-20

Boehler, Anne Marie

Motor vehicles

Steering gear

With electric power assist

180443, 310 12, B62D 504

Patent

active

059245182

ABSTRACT:
An electric power assist steering system (10) includes a pinion gear (102) supported for rotation in a motor housing (30). The pinion gear (102) is operatively connected to a steering wheel (12) of the vehicle through a torsion bar (106). A linear electric assist motor (17) is located in the housing (30). The motor (17) includes a stator (122) fixed to the motor housing (30) and a slider (124) supported for linear movement relative to the housing. Rack teeth (180) are disposed on the slider (124) in meshing engagement with the pinion gear (102). The system (10) further includes a torque sensor (110) for providing a torque signal in response to the sensed applied steering torque. A controller (186) provides a control signal in response to the torque signal and actuates the motor (17) to effect linear movement of the slider (124). Steering linkage members (18, 19, 20, 21) connect the slider (124) of the motor (17) to steerable wheels (22, 24) of the vehicle.

REFERENCES:
patent: 4653602 (1987-03-01), Anders et al.
patent: 4785901 (1988-11-01), Maeda
patent: 5040631 (1991-08-01), Lang
patent: 5685390 (1997-11-01), Chikuma
patent: 5729067 (1998-03-01), Janutka

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