Land vehicles – Wheeled – Running gear
Patent
1985-09-03
1986-10-14
Bertsch, Richard A.
Land vehicles
Wheeled
Running gear
280 6R, 180 41, B60G 1100
Patent
active
046168486
ABSTRACT:
A suspension control system includes a suspension system variable of stiffness and/or damping characteristics, a road sensor producing a road condition indicative signal and a controller for controlling the stiffness and/or damping characteristics of the suspension system depending upon the road condition indicative signal value and the vehicle speed indicative signal value. The controller is detective of the vehicle speed in a predetermined normal speed range which is defined by a lower speed criteria and an upper speed criteria, for generally maintaining the stiffness or damping characteristics of the suspension in relatively soft. The controller is detective of the vehicle speed indicative signal value smaller than the foregoing lower speed criteria to increase sensitivity of the road sensor and/or harden the suspension system at harder level than that in the normal speed range when the roughness of the road surface beyond a rough road criteria. Also, the controller is detective of the vehicle speed indicative signal value greater than the upper speed criteria for increasing sensitivity of the road sensor and/or harden the suspension system at harder level than that in the normal speed range when the roughness of the road surface beyond a rough road criteria, the relative displacement between a vehicle body and a road wheel, a vehicle speed sensor producing a vehicle speed indicative signal.
REFERENCES:
patent: 4162083 (1979-07-01), Zabler et al.
patent: 4368900 (1983-01-01), Beusse
patent: 4526401 (1985-07-01), Kakizaki et al.
patent: 4564214 (1986-01-01), Tokunaga et al.
patent: 4564215 (1986-01-01), Kumagai et al.
patent: 4568101 (1986-02-01), Bleustein et al.
Akatsu Yohsuke
Kuroki Junsuke
Sugasawa Fukashi
Bertsch Richard A.
Nissan Motor Company Limited
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