Motor vehicles – Including one or more ski-like or runner members – With at least one surface-engaging propulsion element
Patent
1987-09-02
1988-12-13
Pekar, John A.
Motor vehicles
Including one or more ski-like or runner members
With at least one surface-engaging propulsion element
91434, B62D 508
Patent
active
047904011
ABSTRACT:
The invention relates to a steering force controller for power steering apparatus which controls a steering force by controlling an oil pressure supplied to an oil pressure reaction chamber of a reaction mechanism. A pressure controlling mechanism which controls the oil pressure supplied to the oil pressure reaction chamber operates to increase a channel area between a reaction passage which communicates with the oil pressure reaction chamber and a feed passage which communicates with the discharge port of a pump and at the same time reduce a channel area between the reaction passage and a discharge passage which communicates with a tank associated with the pump in accordance with a displacement of the spool in one direction which is caused by a solenoid. In this manner, the flexibility in controlling the pressure within the reaction chamber is enhanced. Chambers formed at the opposite ends of the spool valve communicate with the tank and are maintained under a low pressure.
REFERENCES:
patent: 4637484 (1987-01-01), Ijiri et al.
patent: 4681184 (1987-07-01), Suzuki et al.
Jidosha Kiki Co. Ltd.
Pekar John A.
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