Rotation speed control apparatus of open close body for vehicle and rotation speed control method of the same
AssigneeOhi Seisakusho Co., Ltd.
InventorHibiki Ogura
Life of this patent
Estimating the term…
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.
Claims7
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.
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:
- 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.
Dependencies are inferred from the claim text.