JPH0636300Y2 - Start-stop device for internal combustion engine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an improvement of a start-stop system for an internal combustion engine used in, for example, a motorcycle.

[Conventional technology]

FIG. 3 is an electric circuit diagram showing a conventional starting / stopping device disclosed in, for example, Japanese Utility Model Publication No. 55-52063. In the figure, (1) is a battery, (2) is a starting relay, (3) is a starting motor, and the battery (1), the starting relay (2) and the starting motor (3) are connected in series. . (5) is a two-circuit, one-contact type stop switch having a circuit contact of (5a) and a circuit contact of (5b), and when the contact (5a) is open, the contact (5b) is closed. And contact (5a)
When is closed, the contact (5b) is open. (4) is a starting switch, in which the contact (5a) of the battery (1) and the stop switch (5) and the starting coil of the starting relay (2) are connected in series. (6) is an igniter, which is misfired by grounding the stop terminal (6a), and the terminal (6a) is grounded through the contact (5b) of the stop switch (5).

Next, the operation will be described. When starting the engine, the contact (5a) is closed by operating the stop switch (5),
By opening b) and closing the starting switch (4), the current of the battery (1) flows into the starting coil of the starting relay (2), the starting relay (2) closes, and the current of the battery (1) becomes the starting motor ( 3), the starting motor (3) rotates, and the engine is driven by the starting motor (3). When the engine starts to operate, the driving by the starting motor (3) becomes unnecessary, so the starting switch (4) is opened, the starting relay (2) is opened, and the starting motor (3) is opened.
Even if the rotation of the engine stops, the engine continues to operate.

Next, in order to stop the engine from the operating state, the contact (5a) of the stop switch (5) is opened and the contact (5b) is closed, so that the stop terminal (6a) of the ignition device (6) is stopped by the stop switch (5a). ) Is grounded by the contact (5b), the ignition of the engine is invalidated and the engine stops. Here, when the stop switch is in this state, that is, when the contact (5a) is open and the contact (5b) is closed, the ignition device (6) is in the misfire state and the start switch (4) is activated. Since the starting circuit does not operate and the starting motor (3) does not rotate, the user sets the ignition device (6).
It is possible to prevent the battery (1) from being over-discharged by the operation of the starting motor (3) even if the starting switch (4) is continuously closed without noticing that the starting switch (4) is in the misfire state.

[Problems to be solved by the invention]

Since the conventional start-stop device is configured as described above, the stop switch (5) requires an expensive switch with a complicated structure of two-circuit one-contact type, and the wiring of the lead wire to the switch terminal is required. It is long and complicated, and when the lines come into contact with each other due to defective or damaged switches,
Due to the short circuit of the battery (1) to the ground, the lead wire and the switch are damaged, and further, the ignition device (6) is broken, resulting in lack of safety and reliability.

Further, since the conventional start-stop device merely prevents the starting motor (3) from operating in the misfire state of the internal combustion engine, the internal combustion engine and the drive wheels are connected to each other in, for example, a motorcycle. There is a problem in that it cannot prevent accidents that occur when the starting motor is mistakenly operated in a state where it is operating, or damage to each device, resulting in lack of safety and reliability.

The present invention has been made to solve the above-mentioned problems, and has a simple and inexpensive structure, and is excellent in safety and reliability that can prevent the starting motor from being operated by the user's careless starting operation. Another object of the present invention is to obtain a start / stop device for an internal combustion engine.

[Means for solving problems]

A start-stop device for an internal combustion engine according to the present invention is connected in series with a start switch and disconnection / continuity detection switching means, and a semiconductor switching element that prohibits the operation of a starting motor when not conducting, and an ignition operation of the internal combustion engine. An ignition device having a stop terminal for operating, and a stop switching connected to the control electrode and the stop terminal of the semiconductor switching element, which when opened, causes the internal combustion engine to misfire and makes the semiconductor switching element non-conductive. .

[Action]

An internal combustion engine start / stop device according to the present invention controls a misfire operation and an operation prohibition operation of a starting motor in an internal combustion engine by a stop switch, and when the disconnection / continuation detection switching means is cut off, the stop switch is operated. The operation of the starting motor is prohibited regardless of whether the motor is opened or closed.

〔Example〕

Hereinafter, a start-stop system for an internal combustion engine used in a two-wheeled vehicle will be described with reference to the drawings as an embodiment of the present invention. The driven body for the internal combustion engine is the drive wheel. In FIG. 1, (7) is a transistor which is a semiconductor switching element, the emitter is connected to the starting switch (4), and the collector is connected to the starting coil of the starting relay (2). (8) is a clutch switch that detects the state of the clutch that connects to and disconnects from the drive wheels of the engine. When the clutch is cut off, it closes, and when the clutch is connected, it opens. One end is connected to the other terminal of the starting coil and the other end is grounded.

(10) is a neutral switch that detects the on / off state of the transmission of the engine, and is closed when the transmission is open and open when the transmission is connected. One end is a diode. It is connected to the clutch switch (8) via (9) and the other end is grounded. The clutch switch (8) and the neutral switch (10) constitute a disconnection / continuation detection switching means. (11) is a neutral lamp, which is connected between the battery (1) and the neutral switch (10). (12), (13)
Is a resistor and a diode connected in series between the base of the transistor (7) and the stop switch (5). (6b) is different from the conventional example, when the stop switch (5) is closed, the ignition device (6) performs the ignition operation, and when the stop switch (5) is open, the ignition device (6) is ignited. This is the stop terminal to be invalidated. The other structure is similar to that of the conventional device, and the description thereof is omitted.

Next, the operation will be described. Now, when the engine is started, the stop switch (5) is closed and the clutch switch is grounded with the clutch cut off, or the neutral switch is grounded without the transmission connected. The neutral lamp (11) is lit from the battery (1) through the neutral switch (10) to indicate the neutral state. Here, the diode (9) operates so that the neutral lamp (11) does not light when the clutch (8) is grounded.
When the starting switch (4) is closed, the battery voltage will flow from the emitter of the transistor (7) through the base through the resistor (12), the diode (13) and the stop switch (5) to the transistor (7). When the starting relay (2) is conductive, a starting current flows through the clutch switch (8) or the neutral switch (10) to excite the starting coil to bring the contact of the starting relay (2) into a conducting state and start the start. The engine motor (3) is started to start the engine. To stop the engine from running,
By opening the stop switch (5), the stop terminal (6b) of the ignition device (6) is opened, the ignition is invalidated and the engine stops. At this time, the diode (13) functions to prevent backflow from the stop terminal (6b) to the transistor (7).

Next, even if the start switch (4) is closed to restart the engine in this state, the base current of the transistor (7) does not flow because the stop switch (5) is open, and the transistor (7) Since it does not operate, even if the clutch switch (8) or the neutral switch (10) is grounded, the starting relay (2) does not operate and the starting motor does not rotate.

That is, in the misfire state of the internal combustion engine due to the stop switch (5), even if the rotation of the internal combustion engine is not transmitted to the drive wheels, the operation of the starting motor (3) by the start switch (2) is blocked, and the user The operation of the starting motor is continued without noticing that the stop switch (5) is operating to prevent the battery (1) from being over-discharged.

When the clutch switch (8) and the neutral switch (10) are both opened and the engine is connected to the drive wheels, the start coil of the start relay (2) is not grounded, so the stop switch (5) is grounded. However, the starting relay (2) does not conduct, the starting motor (3) does not rotate,
Prevent accidents such as jumping out due to the starting motor (3).

Although only the starting relay (2) is used to control the starting motor (3) in the above embodiment, another electromagnetic relay (14) may be added as shown in FIG. By configuring the starting relay and the electromagnetic relay as shown in Fig. 2, the control coil current can be reduced, and the current capacity of the transistor (7), clutch switch (8), neutral switch (10), etc. can be reduced. is there.

[Effect of device]

As described above, according to the present invention, with a simple structure, it is possible to prevent the battery from being over-discharged by the user's careless starting operation, the internal combustion engine ignition device being damaged, and the accident such as a two-wheeled vehicle jumping out at a low cost. There is an effect that a start / stop device for an internal combustion engine, which is excellent in reliability and safety, can be obtained. Also, since the stop switch is connected to the control pole of the semiconductor switching element and the stop terminal of the ignition device, the current capacity of the stop switch can be reduced and downsized, and power is supplied to the ignition device when the stop switch is opened. There is no possibility that the operation of the internal combustion engine will become unstable because it is not stopped.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram showing a start-stop device according to an embodiment of the present invention, FIG. 2 is an electric circuit diagram showing a start-stop device according to another embodiment of the present invention, and FIG. 3 is a conventional start-stop device. It is an electric circuit diagram showing an apparatus. In the figure, (1) is a battery, (2) is a starting relay, (3) is a starting motor, (4) is a starting switch,
(5) is a stop switch, (6) is an ignition device, (7) is a transistor, (8) is a clutch switch, (9) and (13) are diodes, (10) is a neutral switch,
(11) is a neutral lamp, (12) is a register, (1
4) is an electromagnetic switch Incidentally, in each drawing, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] 1. A starting switch of a starting motor for starting an internal combustion engine, and a starting switch which is connected in series with the starting switch and shuts off when a power transmission path from the internal combustion engine to a driven body is connected. When connected, the disconnection / connection detection switching means that is conducted, and the start switch and the connection / disconnection detection switching means are connected in series,
Connected to a semiconductor switching element that inhibits the operation of the starting motor when not conducting, an ignition device that has a stop terminal for inhibiting the ignition operation of the internal combustion engine, and a control pole of the semiconductor switching element and the stop terminal. And a stop switch for causing the internal combustion engine to misfire and opening the semiconductor switching element when not opened.