US 5,898,284 A · Vehicle sliding door opening/closing control device

Abstract

A vehicle sliding door opening/closing control device includes a trouble detecting circuit for detecting a trouble in a control unit which is used for controlling operation of a motor to drive a vehicle sliding door in opening and closing direction, and switching unit responsive to detection of a trouble in the control unit by the trouble detecting circuit for shorting power input terminals of the motor, and after the lapse of a predetermined time, opening the power input terminals of the motor. Upon detection of the trouble in the control unit, the power input terminals of the motor are shorted so that the motor is kept in a locked state. In this instance, if the sliding door is moving at a high speed, it is possible to apply braking to the sliding door. Thereafter, after the lapse of the predetermined time, the switching unit opens the power input terminals of the motor to release a lock on the motor, thereby allowing the sliding door to be displaced by manual.

Claims8

Dependent claims

A vehicle sliding door opening/closing control device for controlling the movement of a sliding door which opens and closes an opening defined in the body of a vehicle, comprising:

a motor for driving the sliding door in opening and closing directions;
a battery for supplying power to said motor;
a control unit for controlling the operation of said motor;
a trouble detecting circuit for detecting trouble in said control unit;
switching means for, when said trouble detecting circuit detects trouble in said control unit, shorting power input terminals of said motor, and after a lapse of time, opening the power input terminals of said motor, said switching means including a pulse signal generating circuit, said pulse signal generating circuit including a triangular pulse signal generator for generating a triangular pulse signal, an RC circuit containing a resistance and a capacitance, and a comparator for comparing said triangular pulse signal with a terminal voltage of said capacitance of said RC circuit so as to generate a pulse signal having a constant voltage.

2 more elements

A vehicle sliding door opening/closing control device for controlling the movement of a sliding door which opens and closes an opening defined in the body of a vehicle, comprising:

a motor for driving the sliding door in opening and closing directions;
a battery for supplying power to said motor;
a control unit for controlling the operation of said motor;
a trouble detecting circuit for detecting trouble in said control unit;
a pulse signal generating circuit for, when said trouble detecting circuit detects trouble in said control unit, generating a pulse signal having a progressively varying duty factor;
and
switching means for shorting power input terminals of said motor such that a shorting time decreases progressively on the basis of said pulse signal.

4 more elements

Dependencies are inferred from the claim text.

Vehicle sliding door opening/closing control device

Life of this patent

Vehicle sliding door opening/closing control device

Life of this patent

Abstract

Claims8