Aisin Seiki Kabushiki Kaisha

Kiyoshi Okamoto

Hideharu Kato

Takashi Kikuta

Kentaroh Hirose

A opening and closing control device for a cover provided at an opening includes an electric motor for actuating the cover to open and close the opening, at least two rotational number sensors for generating pulse signals which have different phases from one another based on a rotational number of the electric motor, and a position detector for detecting the position of the cover based on one of the pulse signals and for judging a moving direction of the cover in accordance with a signal level of one of the rotational number sensors when the other rotational number sensor detects an edge of the pulse signal.

Opening and closing control device for cover

An entrapment detection device of an opening/closing member which efficiently performs an entrapment determination and restrains an entrapment load even when a motor rotational signal is not inputted. The entrapment detection device includes a controller for performing the entrapment detection based on detected motor rotational signal cycle changes outputted from a motor rotation sensor which is synchronized with the movement of a motor for actuating an opening/closing member. The controller stores the cycle changes of a predetermined number of output pulses from the sensor, predetermines a standard cycle time Tb from the stored pulse output, and calculates a cycle coefficient of the entrapment. When the motor rotational speed is reduced, an entrapment detection operation is performed by comparing a value of time from a previous cycle change to a current cycle change multiplied by the calculated cycle coefficient with the standard cycle Tb.

Entrapment detection device of opening/closing member

An open/close control device for a movable lid is of a highly precise position detection ability by using only a sensor which issues a pulse train in response to a motor rotation amount. When the open/close control device is in the form of a drive unit which controls opening and closing a sunroof, the drive unit includes a motor which drives the sunroof and a control device having a microcomputer . The microcomputer is fed with two pulse train signals from two Hall-ICs, respectively. The signals are in proportion to the rotation number of the motor but are different in phase. On the basis of the pulse train signals, the microcomputer counts a position counter for indication of current position of the sunroof in view of the motor rotation direction.

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Hekinan, Japan

Kiyoshi Okamoto