Rotation speed control apparatus of open close body for vehicle and rotation speed control method of the same
First Claim
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1. A rotation speed control apparatus of an open close body rotatably attached to a vehicle body so as to be freely opened and closed, comprising:
- an opening and closing means having a motor for opening and closing the open close body;
a detector for detecting a position of the open close body; and
a controller for PWM controlling the motor, increasing a duty ratio of the PWM control according to a given increasing rate just after starting the motor, reducing the duty ratio to a given value by detecting a start of the open close body by means of the detector, and keeping the given value of the duty ratio for a given period.
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Abstract
A controller PWM control an opening and closing motor (16) of an opening and closing means, increases a duty ratio of the PWM control according to a given increasing rate just after starting the opening and closing motor (16), reducing the duty ratio to a given value by detecting a start of the open close body, and keeping the given value of the duty ratio for a given period.
26 Citations
7 Claims
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1. A rotation speed control apparatus of an open close body rotatably attached to a vehicle body so as to be freely opened and closed, comprising:
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an opening and closing means having a motor for opening and closing the open close body;
a detector for detecting a position of the open close body; and
a controller for PWM controlling the motor, increasing a duty ratio of the PWM control according to a given increasing rate just after starting the motor, reducing the duty ratio to a given value by detecting a start of the open close body by means of the detector, and keeping the given value of the duty ratio for a given period. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A rotation speed control method of an open close body rotatably attached to a vehicle body so as to be freely opened and closed, comprising the steps of:
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increasing a voltage applied to a motor driving the open close body step by step from an initial voltage;
detecting a start of rotation of the open close body;
reducing the voltage applied to the motor to a given value and keeping the electric voltage constant until a rotation speed of a rear gate becomes smaller than a given target rotation speed;
increasing the voltage applied to the motor every given time;
keeping the voltage applied to the motor constant until the open close body reaches a given position; and
stopping the motor at a time when the open close body reaches the given position.
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Specification