Motor vehicles – Including one or more ski-like or runner members – With at least one surface-engaging propulsion element
Patent
1985-08-20
1987-09-15
Love, John J.
Motor vehicles
Including one or more ski-like or runner members
With at least one surface-engaging propulsion element
180141, B62D 508
Patent
active
046933328
ABSTRACT:
In a power-assisted steering system including an electrically operated bypass valve mounted on a hydraulic power cylinder and disposed within a bypass passage between opposite fluid chambers of the cylinder to permit bypass flow passing therethrough in its energized condition, an electric control apparatus includes a first sensor arranged to detect a travel speed of the vehicle for producing a first electric signal indicative of the vehicle speed, a second sensor arranged to detect a rotation speed of a prime mover of the vehicle for producing a second electric signal indicative of the rotation speed of the prime mover, a microcomputer responsive to the first and second electric signals for determining an optimum steering effort in relation to each value of the electric signals on a bais of predetermined respective functions of the vehicle speed and the rotation speed of the prime mover and for producing an electric control signal indicative of the optimum steering effort. The bypass valve is energized by the electric control signal applied thereto from the computer to control the opening degree of the bypass passage in accordance with the value of the electric control signal.
REFERENCES:
patent: 4300650 (1981-11-01), Weber
patent: 4473128 (1984-09-01), Nakayama et al.
patent: 4476529 (1984-10-01), Nakamura et al.
patent: 4518055 (1985-05-01), Yagi et al.
Katoh Shinji
Miyata Hiroshi
Love John J.
McGiehan Donn
Toyota Jidosha & Kabushiki Kaisha
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