Control system for adjusting damping force coefficient of shock absorber for automotive suspension
AssigneeAtsugi Unisia Corporation
InventorsMichiya Nakamura, Mitsuo Sasaki, Makoto Kimura
Life of this patent
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Abstract
A control system for a damping force coefficient of a shock absorber for a vehicle suspension provides a controller for correcting the position of a step motor. The controller sets the step motor at a predetermined position in a manner to intermittently move the step motor to a stop position restricted by a stopper and to reversely rotate it by a predetermined number of steps. Therefore, the step motor is precisely set at a home position without using a position detector.
Claims20
A control system for a vehicular suspension, comprising:
- a shock absorber disposed between a vehicular body and a wheel;
- an adjusting member installed in said shock absorber and changing the damping force coefficient of said shock absorber;
- a step motor connected to said adjusting member so as to rotatingly drive said adjusting member;
- a stopper restricting rotation of said adjusting member;
- means for detecting vehicle behavioral information and outputting a signal indicative of the vehicle behavioral information;
- and
- means for controlling said adjusting member through said step motor into a desired state on the basis of the signal from said detecting means, said controlling means including a correcting means which sets said adjusting member at a home position relative to said stopper by outputting predetermined drive signals by installments to said step motor.
A control system for a vehicular suspension, comprising:
- a shock absorber disposed between a vehicular body and a wheel;
- an adjusting member installed in said shock absorber and changing the damping force coefficient of said shock absorber;
- a step motor connected to said adjusting member so as to rotatingly drive said adjusting member;
- a stopper restricting rotation of said adjusting member;
- means for detecting vehicle behavioral information and outputting a signal indicative of the vehicle behavioral information;
- and
- means for controlling said adjusting member through said step motor into a desired state on the basis of the signal from said detecting means, said controlling means including a means which sets said adjusting means at a home position by using rotatable steps within a movable range of said rotation of said adjusting member determined in part by said stopper wherein said rotatable steps are divided into several groups which are different in number of steps from each other so as to be gradually decreased in number, the groups being intermittently outputted in a numerical order as drive signals.
A control system of a damping force coefficient of a shock absorber for a vehicular suspension, said shock absorber disposed between a vehicular body and a wheel, said system comprising:
- an adjusting member installed in said shock absorber and changing the damping force coefficient of said shock absorber;
- a step motor connected to said adjusting member so as to rotatingly drive said adjusting member;
- a stopper restricting rotation of said adjusting member;
- means for detecting vehicle behavioral information and outputting a signal indicative of the vehicle behavioral information;
- means for controlling said adjusting member through said step motor into a desired state on the basis of the signal from said detecting means;
- and
- means for correcting a home position of said adjusting member through said step motor, said correcting means correcting the home position by outputting predetermined drive signals in installments to said step motor before a start of the adjusting member control of said step motor.
A position initializing device of a step motor in a shock absorber which variably changes its damping force coefficient, the shock absorber being disposed between a vehicular body and a wheel of an automotive vehicle, an adjusting member being installed in the shock absorber and fixedly connected to the step motor, said position initializing device comprising;
- a stopper restricting the rotation of the adjusting member;
- and
- an initializing means which sets the adjusting member at a home position in such a manner that rotatable steps corresponding to a movable range of said adjusting member between said stopper are divided into several groups which are different in number of steps from each other so as to be gradually decreased in number, the groups being intermittently outputted in numerical order as drive signals.
Dependencies are inferred from the claim text.