JP2015151971A - Starting device for internal combustion engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a starting device for an internal combustion engine, which enables a starter motor to be driven even when a battery deteriorates.SOLUTION: A starting device 1 for an internal combustion engine comprises: a starter motor 16 starting the internal combustion engine; a relay 12 which closes a relay contact 22 and connects a battery 30 to the starter motor 16 when electric power is supplied from the battery 30 to a coil 21; an ignition switch 11, by being turned on, connecting the battery 30 to the coil 21; a control part 15 performing control for supplying electric power from the battery 30 to the coil 21 when the ignition switch 11 is turned on; and a switch 14 switching between a state in which the other end of the coil 21 is connected to the control part 15 and the control part 15 performs the control, and a state in which the other end of the coil 21 is grounded and electric power is supplied from the battery 30 to the coil 21 with the control part 15 not performing the control.

Description

  The present invention relates to a starter for an internal combustion engine that starts an internal combustion engine of a vehicle.

  Conventionally, a saddle-ride type vehicle such as a scooter or a moped has an internal combustion engine that performs so-called idling stop control that automatically stops an engine when a predetermined condition is satisfied and then restarts the engine again when the predetermined condition is satisfied. Some have an engine starter.

  In such a situation, Patent Document 1 discloses that the engine temperature is equal to or higher than a predetermined value, the vehicle speed once exceeds a predetermined value, the battery voltage is equal to or higher than a predetermined value, and at least the front brake switch and the rear brake switch. Disclosed is an internal combustion engine starting device that automatically stops an engine when all of the conditions that one is ON and the throttle is fully closed and idling are satisfied. Patent Document 1 discloses that the brake release operation has been performed, that the throttle opening has become equal to or greater than a predetermined value, that the starter switch has been turned on, that the engine temperature has fallen below the predetermined value, and that the voltage of the battery Disclosed is an internal combustion engine starter that restarts an engine when any one of the following conditions is satisfied.

  In the idling stop control in the conventional starter for an internal combustion engine, the drive of the starter motor is controlled by an ECU (Electronic Control Unit). More specifically, the ECU controls driving of the starter motor by switching on and off of the starter relay output port. At this time, the ECU operates by receiving supply of power supply voltage from the battery, turns on the starter relay output port, and drives the starter motor.

JP 2005-264929 A

  However, according to the study of the present inventors, when the battery deteriorates, the power supply voltage supplied from the battery to the ECU falls below the operating voltage of the ECU, and the ECU stops operating. In this case, the ECU cannot control the drive of the starter motor and has a problem that it cannot be started. In particular, in the saddle-ride type vehicle, the capacity of the battery is smaller than that of a four-wheeled vehicle, and the battery is easily deteriorated.

  The present invention has been made through the above-described studies, and an object of the present invention is to provide a starter for an internal combustion engine that can drive a starter motor even when a battery is deteriorated.

In order to achieve the above object, the present invention is an internal combustion engine starter for starting an internal combustion engine of a vehicle, which is driven by being supplied with electric power from a battery to start the internal combustion engine, A relay that closes a relay contact when power is supplied from the battery to the coil and connects the battery and the starter motor, and is provided between one end of the coil and the battery, and is turned on to turn the battery An ignition switch that connects the coil to the coil, a control unit that performs control for supplying power from the battery to the coil when the ignition switch is turned on, and the other end of the coil to the control unit A state where the control unit performs the control and the other end of the coil is grounded and the control unit Power to the coil from the battery without the serial control and having and a switch for switching between a state to be supplied.

  The internal combustion engine starter according to the present invention as described above is a starter for an internal combustion engine that starts an internal combustion engine of a vehicle, and is driven by being supplied with electric power from a battery to start the internal combustion engine. Provided between a motor, a relay that closes a relay contact when electric power is supplied from the battery to the coil, and connects the battery and the starter motor, between one end of the coil and the battery, and is turned on An ignition switch for connecting the battery and the coil, a control unit for controlling power to be supplied from the battery to the coil when the ignition switch is turned on, and the other end of the coil at the other end. Connected to the control unit, the control unit performs the control, and the other end of the coil is grounded before Since the control unit has a switch for switching between a state where power is supplied from the battery to the coil without performing the control, the starter motor is driven even when the battery is deteriorated. Can do.

FIG. 1 is a block diagram showing a configuration of a starter for an internal combustion engine according to an embodiment of the present invention.

  Hereinafter, an internal combustion engine starter according to an embodiment of the present invention will be described in detail with reference to the drawings as appropriate.

<Configuration of starter for internal combustion engine>
First, with reference to FIG. 1, the configuration of the internal combustion engine starter in the present embodiment will be described in detail.

  FIG. 1 is a block diagram showing a configuration of a starter for an internal combustion engine according to an embodiment of the present invention.

  The internal combustion engine starter 1 in this embodiment is mounted on a saddle-ride type vehicle (not shown).

  The internal combustion engine starter 1 includes an ignition switch 11, a relay 12, a starter switch 13, a switch 14, a control unit 15, and a starter motor 16.

  The ignition switch 11 is inserted in series between the positive terminal of the battery 30 and one end of the coil 21 of the relay 12 and the power supply (IGP) terminal of the control unit 15. When the ignition switch 11 is turned on, the positive terminal of the battery 30 is connected to one end of the coil 21 and the IGP terminal of the control unit 15. When the ignition switch 11 is turned off, the connection between the positive terminal of the battery 30 and one end of the coil 21 and the IGP terminal of the control unit 15 is cut off. The negative terminal of the battery 30 is connected to the ground (LG, PG).

The relay 12 is an electromagnetic relay. The coil 21 is inserted in series between the positive terminal of the battery 30 and the terminal 14 a of the switch 14. One end of the coil 21 is connected to the plus terminal of the battery 30 via the ignition switch 11, and the other end of the coil 21 is connected to the terminal 14 a of the switch 14. When power is supplied from the battery 30 to the coil 21, the relay 12 connects the contact 22 a and the contact 22 b and closes the relay contact 22, so that the positive terminal of the battery 30 and the starter motor 16 (not shown) are connected. Connect the terminals. When the power is not supplied from the battery 30 to the coil 21, the relay 12 brings the contact 22a and the contact 22b into a disconnected state.

  The starter switch 13 is inserted in series between the ground (LG) and the starter switch (STRSW) input terminal of the control unit 15. The starter switch 13 is provided on a panel on which a vehicle speedometer and the like are arranged, and is turned on when the internal combustion engine is normally started.

  The switch 14 is inserted in series between the other end of the coil 21 and the starter motor relay (STRLY) output terminal of the control unit 15. A terminal 14 a of the switch 14 is connected to the other end of the coil 21. The contact 14 b of the switch 14 is connected to the STRLY terminal of the control unit 15. The contact 14c of the switch 14 is grounded to the ground (LG).

  The switch 14 switches between a state in which the terminal 14a and the contact 14b are connected and a state in which the terminal 14a and the contact 14c are connected. The switch 14 connects the STRLY output terminal of the control unit 15 and the other end of the coil 21 by connecting the terminal 14a and the contact 14b. The switch 14 connects the other end of the coil 21 by connecting the terminal 14a and the contact 14c. For example, the switch 14 may perform the above-described switching manually, or may include a detection unit that detects the voltage of the battery 30, and performs the above-described switching when the detection unit detects a decrease in the voltage of the battery 30. You may do it.

  The control unit 15 is typically an ECU, and is connected to the IGP terminal connected to the positive terminal of the battery 30 via the ignition switch 11, the STRLY output terminal connected to the contact 14 b of the switch 14, and the starter switch 13. A STRSW input terminal. When the ignition switch 11 is turned on and the starter switch 13 is turned on and the terminal 14a and the contact point 14b are connected at the time of normal starting, the control unit 15 switches from the battery 30 to the coil 21 of the relay 12. Control to supply power. Further, the control unit 15 supplies power from the battery 30 to the coil 21 of the relay 12 when the ignition switch 11 is turned on and the terminal 14a and the contact 14b are connected when performing idling stop control. Control to make it happen.

  The starter motor 16 is driven by receiving electric power from the battery 30 via the relay 12, and starts an internal combustion engine such as an engine (not shown).

<Operation of starter for internal combustion engine>
Next, the operation of the internal combustion engine starter according to this embodiment will be described in detail. The internal combustion engine starting device 1 performs the following operation in idling stop control, for example.

  The control unit 15 connects the battery 30 and the starter motor 16 by performing control to supply power from the battery 30 to the coil 21 of the relay 12 when the ignition switch 11 is turned on. As a result, the starter motor 16 is driven.

  The control unit 15 stops the operation when the voltage of the battery 30 decreases before the internal combustion engine is started, so that the control for supplying power from the battery 30 to the coil 21 cannot be performed. Thereby, the drive of the starter motor 16 stops.

And although the control part 15 starts operation | movement when the voltage of the battery 30 rises again after predetermined time progress, it repeats said operation | movement.

  When the above operation is repeated, the internal combustion engine cannot be started. Accordingly, the switch 14 is switched from a state in which the terminal 14a and the contact 14b are connected to a state in which the terminal 14a and the contact 14c are connected. As a result, the relay 12 can connect the battery 30 and the starter motor 16 when power sufficient to close the relay contact 22 is supplied from the battery 30 to the coil 21. In this case, the internal combustion engine starter 1 can start the internal combustion engine by supplying power from the battery 30 to the starter motor 16 without being controlled by the control unit 15.

  As is apparent from the above description, the internal combustion engine starter 1 in this embodiment is driven by power supplied from the battery 30 to start the internal combustion engine, and the battery 30 to the coil 21. Provided between the relay 12 that closes the relay contact 22 when the power is supplied and connects the battery 30 and the starter motor 16, one end of the coil 21, and the battery 30, and is turned on to turn on the battery 30 and the coil 21. The ignition switch 11 for connecting the power source, the control unit 15 for controlling the power supply from the battery 30 to the coil 21 when the ignition switch 11 is turned on, and the other end of the coil 21 connected to the control unit 15 The control unit 15 performs control, and the other end of the coil 21 is grounded to control the control unit 15. Since the coil 21 from the battery 30 without performing the control are those having a state in which electric power is supplied, a switch 14 for switching and the battery is capable of driving the starter motor even when the degraded.

  In the present invention, the type, shape, arrangement, number, and the like of the members are not limited to the above-described embodiment, and the gist of the invention is appropriately replaced such that the constituent elements are appropriately replaced with those having the same operational effects. Of course, it can be changed as appropriate without departing from the scope.

  For example, the present invention is not limited to the case where idling stop control is performed, but can be widely applied to control for normal starting of an internal combustion engine or control for automatically stopping and starting an internal combustion engine.

  As described above, the present invention can provide a starter for an internal combustion engine that can drive a starter motor even when the battery is deteriorated. It is expected that the present invention can be widely applied to electronic control devices for vehicles.

DESCRIPTION OF SYMBOLS 1 ... Internal combustion engine starter 11 ... Ignition switch 12 ... Relay 13 ... Starter switch 14 ... Switch 14a ... Terminal 14b ... Contact 14c ... Contact 15 ... Control part 16 ... Starter motor 21 ... Coil 22 ... Relay contact 22a ... Contact 22b ... Contact 30 ... Battery

Claims (1)

An internal combustion engine starter for starting an internal combustion engine of a vehicle,
A starter motor that is driven by power supplied from a battery to start the internal combustion engine;
A relay that closes a relay contact when power is supplied to the coil from the battery and connects the battery and the starter motor;
An ignition switch provided between one end of the coil and the battery, and connecting the battery and the coil by turning on;
A control unit that performs control for supplying electric power from the battery to the coil when the ignition switch is turned on;
The other end of the coil is connected to the control unit and the control unit performs the control, and the other end of the coil is grounded and the control unit does not perform the control, and the power is supplied from the battery to the coil. A switch for switching between a state in which power is supplied,
A starter for an internal combustion engine characterized by comprising:

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