JPH0953551A - Control device for starter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the structure of the select position detecting device of an automatic transmission, to reduce the size of the device and to facilitate decision of abnormality of the control system of a starter motor. SOLUTION: A select position detecting device 10 to detect the position of the select bar of an automatic transmission has six detecting parts corresponding to the select position of the select bar. When the select bar is selected to a neutral position, a detecting signal S1 is outputted from a detecting contact 11D. When a select lever is selected to a parking position, a detecting signal S2 is outputted from a detecting contact 11F. Further, when either the detecting signal S1 or S2 is outputted, the normally-opening contact 2B of a relay 2 is closed and drive of a starter motor 4 is practicable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a starter control device for driving and controlling a starter motor.

[0002]

2. Description of the Related Art As a control device for a starter of an automobile equipped with an automatic transmission, a starter switch is turned on when a select lever of the automatic transmission is selected to a parking position or a neutral position. Some drive a starter motor.

Conventionally, in such a control device for a starter, for example, a select position detecting device for an automatic transmission as described in JP-A-3-249461 is used. Such a select position detecting device, in addition to the select position detecting unit for automatic transmission control, includes a starter-specific position detecting unit that outputs a detection signal when the select lever is selected to the parking position or the neutral position, The control device for the starter is designed to enable the drive of the starter motor, provided that either the parking position detection unit dedicated to the starter or the neutral position detection unit dedicated to the starter outputs a detection signal. There is.

[0004]

However, in the above-mentioned conventional starter control device, the select position detecting device of the automatic transmission must be provided with the position detecting portion dedicated to the starter. There is a possibility that the structure may be complicated and the size may be increased. Further, since the parking position detecting section and the neutral position detecting section dedicated to the starter of the select position detecting device are independent of the select position detecting section for controlling the automatic transmission, the parking position detecting section dedicated to the starter and the automatic gear shifting Between the parking position detection unit for machine control, there is a tendency for the detection time to shift due to variations in their deployment positions.
There is a problem in that the neutral position detection unit dedicated to the starter and the neutral position detection unit for automatic transmission control are likely to have a difference in detection timing due to variations in their deployment positions. Furthermore, the starter parking position detection unit and the neutral position detection unit of the select position detection device are independent of the automatic transmission control select position detection unit. It was difficult to determine the presence or absence.

An object of the present invention is to provide a starter control device capable of simplifying and downsizing the structure of a select position detecting device of an automatic transmission and easily determining an abnormality of a control system of a starter motor. To do.

[0006]

According to a first aspect of the present invention, there is provided a starter control device which detects a select position of a select lever of an automatic transmission and which serves as a select position detecting unit for controlling the automatic transmission. Select position detecting device provided with a parking position detecting unit that outputs a detection signal when the lever is selected to the parking position, and a neutral position detecting unit that outputs a detection signal when the select lever is selected to the neutral position And a starter switch that is switched when driving the starter motor, and a detection signal is output from the parking position detection unit or the neutral position detection unit, and the starter motor is switched when the starter switch is operated. And a drive circuit for driving And butterflies.

A control device for a starter according to claim 2 is
The drive circuit includes a relay that operates when the parking position detection unit or the neutral position detection unit outputs a detection signal. When the relay operates and the starter switch is switched, the starter motor is operated. It is characterized by driving.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIGS. 1 and 2 are views for explaining a first embodiment of the present invention. FIG. 1 is a circuit configuration diagram of essential parts, and FIG. 2 is an automatic transmission. 2 is a schematic configuration diagram of the select position detecting device of FIG.

In FIG. 1, reference numeral 10 denotes a select position detecting device for detecting a select position of a select lever of the automatic transmission, and a control unit ("AT control unit") of the automatic transmission is detected on the basis of the detection signal.
Also referred to as 1) controls the automatic transmission. The select position detecting device 10 includes a plurality of select position detecting units for controlling the automatic transmission according to the select position of the select lever. As shown in FIG. 2, the select position detectors have contacts 11A, 11B, 11C, 11D, 1
1F and a common contact 12 are arranged as fixed contacts, and a movable contact 13 that slides in the left-right direction in FIG. 2 according to the select position of the select lever is provided.
The contacts 11A, 11B, 11C, 11D and 11F detect select positions of 1 (1st speed), 2 (2nd speed), D (drive), N (neutral), R (reverse) and P (parking), respectively. 6 detection contacts for
One of these is selectively connected to the common contact 12 by the movable contact 13. The common contact 12 is connected to the positive electrode side, and the corresponding contacts 11A to 11F corresponding to the select position of the select lever.
A detection signal is output from the AT control unit 1. In this way, the select position detecting device 10 is configured with a total of six select position detecting units corresponding to the six contacts 11A to 11F. In FIG. 1, the structure of the select position detection device 10 is simplified and contact points 11A to 11F are
To the select position detector corresponding to each of
The symbols D, N, R, and P are attached.

In FIG. 1, L1 is an output line of a neutral position detection signal S1 output from a contact 11D forming a neutral position detecting section, and L2 is a parking position detection output from a contact 11F forming a parking position detecting section. It is an output line of the signal S2. Output line L
Each of L1 and L2 is grounded via the relay coil 2A of the relay 2, and when the detection signal S1 or S2 is output, the relay coil 2A is excited to close the normally open relay contact 2B. Has become. Relay contact 2
B is connected to a drive circuit that drives the starter motor 4 when the starter switch 3 is turned on. Also,
In FIG. 1, D1, D2, D3 and D4 are diodes.

Next, the operation will be described.

The select position detecting device 10 selectively outputs a detection signal from the contacts 11A to 11F in each of the six select position detecting portions in accordance with the select position of the shift lever, and the AT is output in accordance with the detection signal. The control unit 1 controls the automatic transmission. Then, when the shift lever is selected to the neutral position or the parking position and the detection signal S1 or S2 is output, the contact 2B of the relay 2 is closed and the starter motor 4 becomes drivable. That is, in this state, the starter motor 4 can be driven by turning on the starter switch 3.

By using the detection signals S1 and S2 for controlling the automatic transmission as the signal for limiting the drivable time of the starter motor 4, the automatic transmission control is used as a detection unit for outputting the signals S1 and S2. A desired one can be used as it is, and a detector dedicated to the starter is not required, and accordingly, the structure of the select position detector 10 can be simplified and downsized. Further, in this embodiment, since the relay 2 is used, the contacts 11D and 11
The drive current of the starter motor 4 can be made sufficiently large regardless of the current capacity of F.

(Second Embodiment) FIG. 3 is a diagram for explaining a second embodiment of the present invention. In FIG. 3, the same parts as those in the first embodiment described above are designated by the same reference numerals,
The description is omitted.

In this example, a second relay 5 is provided, and a normally open relay contact 2B of the relay 2 is connected in the energizing circuit of the relay coil 5A, and the energizing circuit of the relay coil 5A is connected to the relay contact 2B. Whether it was closed by
In other words, whether or not the relay coil 5A is energized and excited is AT
It can be monitored by the control unit 1. The relay contact 5B is connected to a drive circuit that drives the starter motor 4 when the starter switch 3 is turned on. Further, 6 of the select position detecting device 10
Contact point 11A in each of the two select position detectors
Indicator lamps 6A to 6F that are turned on when a detection signal is output from them are connected to 11F.

In the case of this embodiment, when the detection signal S1 or S2 is output, the two relays 2 and 5 are turned on and the starter motor 4 can be driven. The AT control unit 1 has a contact point 1 in the select position detecting device 10.
Detection signals S3, S from 1A, 11B, 11C, 11E
Whether or not 4, S5 and S6 are present is determined, and when the relay coil 5A is energized and excited, it is determined that one of the detection signals S1 and S2 is output. The AT control unit 1 can determine the presence / absence of abnormality of the select position detecting device 10 by monitoring the presence / absence of the output of the detection signals S1 to S6 in this manner. That is, since the six detection signals S1 to S6 should be output alternatively during normal operation, the AT control unit 1 does not output any of them, or outputs two or more simultaneously. Determines that the select position detection device 10, the output circuit of the detection signals S1 to S6, or the drive circuit of the starter motor 4 is abnormal according to the situation, and responds by issuing a warning in such a case. Take action.

Further, in the normal state, the indicator lamps 6A to 6A are selected according to the detection signals S1 to S6 which are alternatively output.
F lights up alternatively. Therefore, when none of the indicator lamps 6A to 6F light up, or
When two abnormal lights are turned on at the same time, it is possible to determine that an abnormal condition has occurred in the select position detecting device 10 or the output circuit of the detection signals S1 to S6, and cope with it. These indicator lamps 6A to 6F may be connected between the select position detecting device 10 and the positive electrode.

[0019]

As described above, according to the first aspect of the present invention.
The starter control device described in (1) uses the parking position detection unit and the neutral position detection unit for automatic transmission control in the select position detection device, and does not need a starter-dedicated detection unit for these detection units. ,
Accordingly, the structure of the select position detecting device can be simplified and downsized. Further, by monitoring the detection signal of the detection unit for controlling the automatic transmission in the select position detection device, it is possible to determine the presence / absence of an abnormality in the control system of the starter motor and cope with the abnormality.

According to a second aspect of the present invention, in the starter control device, the drive circuit of the starter motor includes a relay that operates when the parking position detector or the neutral position detector outputs a detection signal. Therefore, the drive current of the starter motor can be sufficiently increased irrespective of the current capacity of the parking position detector or the neutral position detector.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram of a main part of a first embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a select position detection device shown in FIG.

FIG. 3 is a circuit configuration diagram of a main part of a second embodiment of the present invention.

[Explanation of symbols]

1 AT Control Unit 2 Relay 3 Starter Switch 4 Starter Motor 10 Select Position Detection Device 11A, 11B, 11C, 11D, 11E, 11F Detection Contact 12 Common Contact 13 Moving Contact

Claims (2)

[Claims] 1. A parking system that detects a select position of a select lever of an automatic transmission and that outputs a detection signal as a select position detecting unit for controlling an automatic transmission when at least the select lever is selected to a parking position. A select position detection device including a position detection unit, a neutral position detection unit that outputs a detection signal when the select lever is selected to the neutral position, and a starter switch that is operated by a switch when driving the starter motor. A starter motor that drives the starter motor when a detection signal is output from the parking position detector or the neutral position detector and the starter switch is operated by a switch. Control device. 2. The drive circuit includes a relay that operates when the parking position detection unit or the neutral position detection unit outputs a detection signal, and when the relay operates and the starter switch is operated by a switch. A control device for a starter, further comprising: driving the starter motor.