Motor vehicles – Including one or more ski-like or runner members – With at least one surface-engaging propulsion element
Patent
1988-09-23
1990-07-10
Marmor, Charles A.
Motor vehicles
Including one or more ski-like or runner members
With at least one surface-engaging propulsion element
180 791, B62D 504
Patent
active
049401076
ABSTRACT:
A method and apparatus for controlling a vehicle power assist steering system. The apparatus includes a control circuit for controlling the power assist as a function of sensed vehicle speed and applied steering torque. The control circuit includes a circuit for providing a pulse-width modulated signal having a duty cycle that varies as a function of vehicle speed. the control circuit further includes a torque signal amplifier having a gain that is controlled by the pulse-width modulated signal. A filter network averages the value of the output of the torque signal amplifier. The average value is a power assist control signal used to control the power assist.
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Camby Richard
Marmor Charles A.
TRW Inc.
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