JPH11200709A - Power sliding-door controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power sliding-door controller capable of minimally inhibiting bringing to an unoperated state of a clutch even when supply voltage is lowered suddenly or interrrupted instantaneously. SOLUTION: The power sliding-door controller has a circuit 9, by which the output level of the output port P3 of a micro computer 1 is set in 'L' when a clutch holding the stopped state of a sliding door is operated and in which an output level is set in 'H' by setting the output level of the output port P3 in 'L'. The clutch is brought to an operated state by the electrical characteristics of the circuit 9 during a time when the circuit 9 is brought to the unoperated state after the micro computer 1 is brought to the unoperated state and during a time when the micro computer 1 is started after the circuit 9 is brought to the operated state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power sliding door control device suitable for a vehicle having a sliding door of a sliding type.

[0002]

2. Description of the Related Art Conventionally, some vehicles employing a sliding door, such as a one-box vehicle, include a power sliding door control device for automatically opening and closing the sliding door.
This power sliding door control device is configured by an arithmetic control circuit such as a microcomputer, and recognizes a door position by a pulse and controls a door opening / closing speed by a motor duty. The opening / closing operation can be performed by an operation switch, keyless entry, manual operation, or the like. Further, the power sliding door control device is provided with a clutch that operates during the door holding state or during the opening / closing operation, and the operation of the clutch can close or open the sliding door even on a downhill or an uphill. Absent.

FIG. 4 is a circuit diagram of a conventional power sliding door control device. In this figure, a microcomputer 1 composed of a CPU, a program memory, a work memory, etc.
For example, assuming that the slide door is opened when a current is supplied to the motor 2 in the direction of arrow A, when the operation of opening the slide door is performed, the level of the output port P2 is set to “L” and the level of the output port P1 is set to “L”. To “H”. As a result, the relay coil 3A is energized and the relay contact 3
B switches from the NC side to the NO side, and a current flows in the direction of arrow A from the battery (not shown) to the motor 2 to open the slide door.

When an operation of closing the slide door is performed, the level of the output port P2 is set to "H" while the level of the output port P1 is set to "L". As a result, the relay coil 4A is energized, the relay contact 4B is switched from the NC side to the NO side, and the motor 2
Current flows in the direction of arrow B, and the sliding door closes.

On the other hand, the microcomputer 1 sets the output level of the output port P3 to "H" during the door holding state or during the opening / closing operation. When the output level of the output port P3 is "L", the transistor 5 is turned on, so that the clutch coil 6 is energized to operate the clutch, and the stopped state of the slide door is maintained. A resistor 7 for flowing a constant current through the transistor 5 is interposed between the output port P3 of the microcomputer 1 and the transistor 5. Microcomputer 1
, A power supply voltage stepped down by the power supply circuit 8 is applied, and the microcomputer 1 operates with this voltage.

[0006]

In the conventional power sliding door control device, when the power supply voltage is suddenly reduced or momentarily interrupted during the door holding state or the opening / closing operation, the microcomputer 1 does not operate. There has been a problem that the clutch does not operate from the stop until the power supply voltage is restored and started, and the stopped state of the slide door cannot be maintained.

Referring to the time chart of FIG. 5, when the power supply voltage suddenly drops, the microcomputer 1 stops operating when the power supply voltage drops by about 6V. When the microcomputer 1 stops operating, the output level of the output port P3 becomes "L", the transistor 5 is turned off, and the clutch does not operate. When the power supply voltage is restored and the microcomputer 1 is started after the operation of the microcomputer 1 is stopped, the output level of the output port P3 becomes "H", the transistor 5 is turned on, and the clutch operates. As described above, the power supply voltage suddenly drops, and the microcomputer 1 stops operating. Thereafter, the clutch is inactive and the slide door remains stopped until the power supply voltage returns and the microcomputer 1 starts up. become unable.

Accordingly, an object of the present invention is to provide a power sliding door control device capable of minimizing the inoperative state of the clutch even when the power supply voltage drops sharply or is momentarily interrupted. I have.

[0009]

In order to achieve the above object, a power sliding door control device according to the present invention controls a motor for driving a sliding door according to an operation command and outputs a predetermined output during a door holding state or during opening / closing operation. A microcomputer that sets the output level of the output terminal to "L"; a circuit that sets the output level to "H" when the output level of the predetermined output terminal of the microcomputer is set to "L"; A clutch that holds the stop state of the slide door at the time of the power slide door control circuit, wherein the circuit is in a non-operating state due to a momentary drop or momentary interruption of the power supply voltage. From the time when the circuit becomes inactive to the time when the circuit becomes inactive and the time after the circuit becomes active until the microcomputer is started, the clutch is operated and the slide door is stopped. Characterized by holding the state.

[0010] According to this configuration, when the power supply voltage is momentarily dropped or momentarily interrupted, a period from when the microcomputer becomes inactive until the circuit becomes inoperable is between when the circuit becomes inoperable and after when the circuit becomes inoperative. Until the microcomputer is started, the clutch is in the operating state, and the stopped state of the slide door is maintained. That is, since the output level of the circuit is "H" between the time when the microcomputer is inactive and the circuit is inactive and the time when the circuit is active and before the microcomputer is started, the clutch Are forcibly activated, and the stopped state of the slide door is maintained. Therefore, even if the power supply voltage is momentarily dropped or momentarily interrupted, the inoperative state of the clutch can be minimized. That is, the period during which the holding of the stopped state of the slide door is released can be shortened as compared with the conventional power slide door control device.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an embodiment of a power sliding door control device according to the present invention. In this embodiment, the same parts as those in FIG. 4 are denoted by the same reference numerals.

In the power sliding door control device of this embodiment, the output level of the output port P3 of the microcomputer 1 is set to "L" when the clutch is operated, and the output level of the output port P3 is set to "L". Thus, the circuit 9 having the output level “H” is provided. The circuit 9 is a circuit composed of two inverters 9a and 9b, one AND gate 9c and one resistor 9d (the two inverters 9a and 9b and one AND gate 9c can be replaced with a NOR gate). Be composed. One of two input terminals of the circuit 9 is connected to the output port P3 of the microcomputer 1,
The other is grounded via a resistor 9d. The output terminal is connected to the base of the transistor 5 via the resistor 7. The power supply for operation is obtained from the power supply circuit 8 together with the microcomputer 1.

The microcomputer 1 sets the output level of the output port P3 to "L" during the door holding state or during the opening / closing operation. When the output level of the output port P3 is "L", the transistor 5 is turned on, so that the clutch coil 6 is energized to activate the clutch, and the stopped state of the slide door is maintained.

If the power supply voltage suddenly drops or is momentarily interrupted during the door holding state or the opening / closing operation, as shown in the time chart of FIG. Although the operating state is established, the circuit 9 continues the operating state until the power supply voltage reaches about 3 V, so that the clutch continues to operate. When the voltage falls below about 3 V, the circuit 9 is deactivated and the clutch is deactivated. afterwards,
When the power supply voltage returns to about 3 V, the circuit 9 is activated, the clutch is activated, and the stopped state of the slide door is maintained. The microcomputer 1 enters an operation state after a wait time from about 3 V to startup.

As described above, between the time when the microcomputer 1 enters the non-operation state and the time when the circuit 9 enters the non-operation state, and the time between the time when the circuit 9 enters the operation state and the time when the microcomputer 1 starts up, the circuit 9 Since the clutch is activated by the electrical characteristics of the above, the non-operation period of the clutch is shorter than that of the conventional power sliding door control device. That is, the period during which the holding of the stopped state of the slide door is released is shortened.

FIG. 3 shows the above operation in the form of a flowchart. When the power supply voltage drops from the normal state to about 6 V, the microcomputer 1 is reset, and the output port P3 is opened. When the output port P3 is in the open state, the signal level at one input terminal of the circuit 9 is "L", so that the output level of the circuit 9 does not change to "H". Moreover, since the circuit 9 operates up to about 3 V, the clutch continues to operate until the voltage drops to about 3 V or less. Then, when the power supply voltage falls to about 3 V or less, the circuit 9 is deactivated and the clutch is deactivated.

Thereafter, when the power supply voltage rises and exceeds about 3 V, the circuit 9 is activated, the output level thereof becomes "H", and the clutch is activated. Then, the power supply voltage further rises and exceeds about 6 V, and the microcomputer 1
After the elapse of the wait time until the start of the microcomputer 1, the output level of the output port P3 of the microcomputer 1 becomes "H", the output level of the circuit 9 becomes "L", and the clutch becomes inoperative. From this point, the operation becomes normal. Thereafter, when the operation of opening and closing the slide door is detected, the clutch is brought into the operating state, and then the motor 2 is operated.

As described above, in this embodiment, when the clutch is operated, the output level of the output port P3 of the microcomputer 1 is set to "L", and the output port P3
The output level becomes “H” when the output level becomes “L”.
The circuit 9 is provided between the time when the microcomputer 1 is turned off and the time when the circuit 9 is turned off and the time when the circuit 9 is turned on and before the microcomputer 1 is started. Since the clutch is activated according to the electrical characteristics of the power sliding door control device, the non-operation period of the clutch can be shortened as compared with the conventional power sliding door control device. That is, the period during which the holding of the stopped state of the slide door is released can be shortened.

[0020]

According to the present invention, even when the power supply voltage is momentarily dropped or momentarily interrupted, the circuit is in the operation state between the time when the microcomputer is inactive and the time when the circuit is inactive. Since the clutch is activated by the electrical characteristics of the circuit between the start and the start of the microcomputer, it is possible to minimize the non-operation of the clutch compared to the conventional power sliding door control device. it can.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a power sliding door control device according to an embodiment.

FIG. 2 is a time chart illustrating an operation of the power sliding door control device of FIG. 1;

FIG. 3 is a flowchart illustrating an operation of the power sliding door control device of FIG. 1;

FIG. 4 is a circuit diagram of a conventional power sliding door control device.

FIG. 5 is a time chart showing an operation of the power sliding door control device of FIG. 4;

[Description of Signs] 1 microcomputer 2 motor 3A, 4A relay coil 3B, 4B relay contact 5 transistor 6 clutch coil 7 resistance 8 power supply circuit 9 circuit

Claims (1)

[Claims] 1. A microcomputer for controlling a motor for driving a sliding door according to an operation command and for setting an output level of a predetermined output terminal to "L" during a door holding state or an opening / closing operation, and the predetermined output of the microcomputer. The output level at the end is "L"
A power sliding door control device comprising: a circuit having an output level of “H” at the time of; and a clutch for maintaining a stop state of the slide door when the output level of the circuit is at “H”. Between the moment the power supply voltage sags or momentary interruption and the microcomputer goes into a non-operation state and the circuit goes into a non-operation state, and the time the circuit goes into an operation state and then the microcomputer starts. A power sliding door control device, wherein the clutch is operated and the sliding door is kept stopped during the period.