Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Vehicle subsystem or accessory control
Patent
1998-02-25
2000-05-23
Nguyen, Tan
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Vehicle subsystem or accessory control
280 5515, 1882662, B60G 1700
Patent
active
060674903
ABSTRACT:
In the suspension control apparatus of the present invention utilizing a PWM type proportional solenoid valve, in which a current in a form such that a dithering current is superimposed on a target current is applied to a solenoid, when the average intensity of the applied current falls outside a predetermined range, a ratio between a time period during which the PWM signal having a decrease duty ratio is applied and a time period during which the PWM signal having an increase duty ratio is applied is changed so that an amplitude of the dithering current can be maintained at a predetermined level. Therefore, an undesirable increase in hysteresis with respect to a damping force can be suppressed, to thereby ensure good reponsivity for controlling a damping force, regardless of the average intensity of the applied current.
REFERENCES:
patent: 5205385 (1993-04-01), Ashiba
Ichimaru Nobuyuki
Yamaguchi Tohma
Nguyen Tan
Tokico Ltd.
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