Motor vehicles – Surface effect vehicles – Dynamic seal or fluid curtain
Patent
1989-09-22
1990-07-10
Hill, Mitchell J.
Motor vehicles
Surface effect vehicles
Dynamic seal or fluid curtain
91371, 180143, B62D 508, B62D 600
Patent
active
049401033
ABSTRACT:
A power steering system for use in a motor vehicle is disclosed. It comprises a power cylinder; a control valve equipped with a pair of reaction chambers; a hydraulic pump; a reaction passage intercommunicating the pair of reaction chambers, a reaction regulating valve disposed in the reaction passage, a pressure sensor sensing the oil pressure in a hydraulic circuit which is equivalent to the weight of a load, and a controller being inputted a desired value of the oil pressure of the reaction chambers corresponding to the speed, steering value, steering effort and steering effort change rate of the motor vehicle beforehand, calculating based on the signals from the pressure sensor and signals from a speed sensor and a steering value sensor, comparing the calculated value with the desired value, controlling the current flowing in an electric actuator of the reaction regulating valve, and controlling the opening degree of the reaction regulating valve so that the hydraulic fluid in the reaction chambers is in accord with the desired value inputted beforehand. Therefore, the most suitable steering power for a slip friction coefficient (.mu.) of the road surface and for the speed of the vehicle can be obtained by sensing the slip friction coefficient (.mu.) of the road surface without being affected by changes in the on-load weight.
REFERENCES:
patent: 4463936 (1984-08-01), Shinbori et al.
Hill Mitchell J.
Hino Jidosha Kogyo Kabushiki Kaisha (Hino Motors, Ltd.)
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