JPH0640933Y2 - 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,
It has a circuit contact (5a) and a circuit contact (5b).
When a) is open, the contact (5b) is closed, and when the contact (5a) 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 ignition device,
Grounding the stop terminal (6a) causes misfire, and the terminal (6a) is grounded via 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), and the contact (5b) is closed.
And the start switch (4) is closed, the current of the battery (1) flows through the start coil of the start relay (2), the start relay (2) is closed, and the current of the battery (1) is changed to the start 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) stops the switch (5a). Since it is grounded by the contact (5b) of 5), 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 a misfire state and the start switch (4) is activated. Since the circuit does not operate and the starting motor (3) does not rotate, even if the user does not notice that the ignition device (6) is in the misfire state and continues to close the starting switch (4), It is possible to prevent the battery (1) from being over-discharged by the operation of the starting motor (3).

[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 having a complicated structure of two-circuit, one-contact type, and the lead wire to the switch terminal is long. It is complicated and the switch is defective.
Alternatively, when the systems come into contact with each other due to damage, the lead wire and switch will be damaged due to a short circuit to the ground of the battery (1), and further, the ignition device (6) will be damaged. There was a problem of lacking.

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 safety and reliability cannot be ensured because it is impossible to prevent accidents that may occur when the starting motor is mistakenly operated while the motor is running, or damage to each device.

The present invention has been made to solve the above-mentioned problems, and has a simple and inexpensive structure, which is excellent in safety and reliability that can prevent the starter motor from being inadvertently started by the user. An object 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 a start switch for a starting motor, and a disconnection / continuity detection switch for detecting disconnection of a power transmission path from the internal combustion engine to a driven body. A semiconductor switching element is connected in series to the means, and a control pole of the semiconductor switching element is connected to a stop switch that causes the internal combustion engine ignition device to misfire when closed.

[Action]

The internal combustion engine start / stop device according to the present invention includes a stop switch and a disconnection switch connected to a semiconductor switching element control pole.
Controlled by the operation of the continuation detection switching means, in the misfire state of the internal combustion engine due to the stop switch, regardless of the disconnection or continuation of the power transmission path from the internal combustion engine to the driven body, the operation of the starting motor by the starting switch is blocked, Even in the ignition state of the internal combustion engine, the operation of the starter motor by the starter switch is prevented in the connected state of the power transmission path.

〔Example〕

Hereinafter, a start-stop system for an internal combustion engine used in a two-wheeled vehicle as an embodiment of the present invention will be described with reference to the drawings. The driven body for the internal combustion engine is the drive wheel. In FIG. 1, (7) is a thyristor which is a semiconductor switching element, and its anode is connected to a series circuit of a starting switch (4) and a starting coil of a starting relay (2).
(8) is a clutch switch that detects the state of the clutch that connects and disconnects to the drive wheels of the engine. It operates to close when the clutch is cut off and open when the clutch is connected. Is connected to the lead of the thyristor (7) and the other end is grounded. (10) is a neutral switch that detects an intermittent transmission of the engine. The switch 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. A neutral lamp (11) is connected between the battery (1) and the neutral switch (10). Reference numerals (12) and (13) denote resistors connected in series between the anode and the gate of the thyristor (7), and the connection point of both resistors is connected to the stop switch (5) via the diode (15). (14) is a resistor connected between the gate and cathode of the thyristor (7). 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 open and the clutch switch is grounded with the clutch cut off, or the neutral switch is grounded without the gearbox 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 switch (8) is grounded. Due to the closing of the starting switch (4), the battery voltage is applied to the anode of the thyristor (7) through the starting coil of the starting relay (2) and the thyristor (7).
The gate of the anode is from the register (12) and (13)
A trigger voltage is applied through the thyristor (7) to conduct, and a current flows from the cathode of the thyristor (7) through the clutch switch (8) or the neutral switch (10) to excite the starting coil and excite the starting relay. (2)
The contact is made conductive and the starting motor (3) is started to start the engine. At this time, the diode (15) works so as to prevent the inflow from the stop terminal (6a) of the ignition device (6).

Stop switch (5) to stop the engine from running
Stop terminal (6a) of ignition device (6) by grounding
Is grounded, the ignition is disabled, and the engine stops. Next, in order to restart the engine in this state, the start switch (4)
When closed, the battery voltage is applied to the anode of the thyristor (7) through the starting coil, but the gate voltage supplied from the anode of the thyristor (7) through the resistor (12) is stopped through the diode (15). Since the switch (5) is grounded, the thyristor (7) is not conducted, and even if the clutch switch (8) or the neutral switch (10) is grounded, the starting coil of the starting relay (2) has a resistor ( From 12), only the current that is grounded through the stop switch (5) flows, and this current is a minute current that triggers the thyristor (7)
Since the starting coil is not excited and the starting relay (2) does not operate, the starting motor (3) 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 is prevented from operating. Continue to operate the starting motor without noticing that the stop switch (5) is operating.
Prevent the battery (1) from being over-discharged.

Further, when the clutch switch (8) and the neutral switch (10) are both opened and the engine is connected to the drive wheels, the cathode of the thyristor (7) is not grounded,
Even when the stop switch (5) is opened, the thyristor (7) does not conduct, the starting motor (3) does not rotate, and accidents such as jumping out by the starting motor (3) are prevented.

Although only the starting relay (2) is used to control the starting motor (3) in the above embodiment, as shown in FIG.
Other electromagnetic relays (16) may be added. By configuring the starting relay and electromagnetic relay as shown in Fig. 2, the control coil current can be reduced, and the current capacity of the thyristor (7), clutch switch (8), and neutral switch (10) 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 over-discharge of buttery due to the careless starting operation of the user, damage to the internal combustion engine ignition device, and accidents 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 having excellent reliability and safety can be obtained.

[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 which shows. (1) Battery, (2) Start Relay, (3) Start Motor, (4) Start Switch, (5) Stop Switch, (6) Ignition Device, (7) Thyristor, (8 )
Is a clutch switch, (9) and (15) are diodes, (10) is a neutral switch, (11) is a neutral lamp, (12), (13) and (14) are resistors, and (1
6) is an electromagnetic switch. In the drawings, the same reference numerals indicate the same or corresponding parts.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-60-60269 (JP, A) Actual development Sho-56-163672 (JP, U) Japanese Patent Sho-52-24614 (JP, B2) Actual public Sho-55- 52063 (JP, Y2) Actual public 53-41631 (JP, Y2) Actual public 51-14987 (JP, Y2)

Claims (1)

[Scope of utility model registration request] 1. A starting switch of a starting motor for starting an internal combustion engine, which is connected in series with the starting switch and is turned off or turned off when a power transmission path from the internal combustion engine to a driven body is connected. When connected, the disconnection / continuity detection switching means, the starting switch and the disconnection / continuity detection switching means are connected in series, and the control pole is connected when the starting switch and the disconnection / continuity detection switching means are conductive. Is connected to a control electrode of the semiconductor switching element, which is brought into a conductive state by applying a predetermined input to the internal combustion engine, and the semiconductor switching element, and
A start-stop device for an internal combustion engine, comprising a stop switch for causing the ignition device to misfire when closed and for bypassing the predetermined input to the semiconductor switching element control pole.