Land vehicles – Wheeled – Running gear
Patent
1989-12-27
1991-06-18
Rice, Kenneth R.
Land vehicles
Wheeled
Running gear
B60G 1700
Patent
active
050244590
ABSTRACT:
A suspension pressure control system applies a pressure which is proportional to a current level supplied to a solenoid of a pressure control valve to a shock absorber associated with a suspension from the valve. When a pressure in a high pressure line which feeds a high pressure to the pressure control valve falls (rises), the pressure applied to the suspension is decreased (increased). Accordingly, the pressure in the high pressure line is detected by a sensor, and if it is low (high), the current level of the pressure control valve is corrected to a high value (low value). In order to prevent an abnormal pressure rise in the suspension which may be caused by an excessive pressure rise in the high pressure line during an idling operation of an engine, a correction which responds to the pressure of the high pressure line is chosen large when a vehicle speed is equal to zero or very low. In order to prevent an abnormality from occurring in the correction of the pressure which is attributable to an errorneous detected value during a failure of operation of sensor, such detected value is determined to be faulty, and in the event a fault occurred, the correction is modified to a given volume (0) which is allocated to a standard pressure in the high pressure line.
REFERENCES:
patent: 4717173 (1988-01-01), Sugasawa et al.
patent: 4730843 (1988-03-01), Tanaka et al.
patent: 4763222 (1988-08-01), Heaston et al.
patent: 4765649 (1988-08-01), Ikemoto et al.
patent: 4787650 (1988-11-01), Doi et al.
Aburaya Toshio
Buma Shuuichi
Hamada Toshiaki
Ikemoto Hiroyuki
Kawanishi Masaki
Aisin Seiki Kabushiki Kaisha
Rice Kenneth R.
Toyota Jidosha & Kabushiki Kaisha
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