Electrical power assisted steering system

Details Electrical power assisted steering system Electrical power assisted steering system

1985-07-12

1986-12-16

Love, John J.

Motor vehicles

Compensating devices

74801, B62D 504

Patent

active

046290249

ABSTRACT:
An electric power assisted steering system for a automotive vehicle having a torque shaft connecting the vehicle's steering wheel with the vehicle's steering mechanism. Rotary power is applied to the output end of the torque shaft by a low speed, high torque electrical motor through a low gear ratio planetary gear system disposed concentrically about the torque shaft. The electric motor is energized by a power amplifier in response to a torque signal generated by a torque sensor responsive to the magnitude and direction of the torque applied between the input and output ends of the torque shaft. The power amplifier has an antilog gain characteristic eliminating the need for a vehicle speed input to reduce or eliminate the authority of the power steering mechanism a nominal and higher vehicle speeds.

REFERENCES:
patent: 2754465 (1956-07-01), Brier
patent: 3580352 (1971-05-01), Hestad
patent: 3792629 (1974-02-01), Applebury
patent: 3983953 (1976-10-01), Bayle
patent: 4173265 (1979-11-01), Kremer
patent: 4193720 (1980-03-01), Machida
patent: 4277695 (1981-07-01), Wilber et al.
patent: 4415054 (1983-11-01), Drutchas
patent: 4448275 (1984-05-01), Kitagawa et al.
patent: 4471280 (1984-09-01), Stack
patent: 4502340 (1985-03-01), Gebben

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