JPS6146218Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an engine starting device mainly applied to motorcycles or tricycles.
The purpose is to prevent the vehicle from starting when the engine is started due to incorrect operation, and to promote proper warm-up of the engine to reduce the engine load when it is cold.

The embodiments shown in the drawings will be described below. Fig. 1 shows a block diagram of the inventive starting device.A capacitor discharge type ignition circuit 1 has an input side connected to a capacitor charging coil 2-1 of an alternator 2, and an output side connected to an ignition coil 3. and is connected to the spark plug 4. The misfire circuit 5 has an input side connected to the pulsar coil 2-2 of the alternator 2, and an output side connected to the ignition circuit 1.
It is connected to the. A control circuit 6 connected to the misfire circuit 5 to control its operation has its input side connected to a front brake switch 7-1 or a rear brake switch 7-2. These switches 7-1 and 7-2 are the ignition switch 8
It is connected to the battery 9 via the front brake lever 7, and opens and closes in conjunction with the operation of the front brake lever or the rear brake lever 7. The battery 9 is connected to a battery charging circuit (not shown) via a line 10. The above switches 7-1, 7-2
A brake operation indicator lamp 11 is connected to the load side of the brake operation indicator lamp 11.

FIG. 2 shows an example of a specific circuit configuration of the above-mentioned ignition circuit 1, misfire circuit 5, and control circuit 6. Hereinafter, an example in which the action of the starting device of the present invention is applied to the motorcycle shown in FIG. 3 will be explained. do.

When the driver first closes the ignition switch 8 and then turns on the kick pedal 12 (or activates a starting motor (not shown)), the thyristor 22 turns off every time a positive wave of AC voltage is applied to the pulser coil 2-2. Then, an ignition system consisting of an ignition circuit 1, an ignition coil 3, and a spark plug 4 is operated to start the engine.

At this time, if the front brake lever or rear brake lever 7 is operated and the switch 7-1 or 7-2 is closed and the starting operation is performed correctly,
The voltage of battery 9 is ignition switch 8,
It is applied to the gate of the thyristor 21 of the control circuit 6 via the switch 7-1 or 7-2. Therefore, the thyristor 21 becomes conductive and the 5 in the misfire circuit 5
Ground point a. Therefore, the misfire circuit 5 becomes inactive, and the engine speed increases in the same way as when starting normally.

After the engine starts, the AC voltage induced in the pulsar coil 2-2 is passed through the rectifier 16 to the capacitor 1.
7, and this charging voltage continues to be applied to the anode of the thyristor 21 via point 5a, so for driving, release the brake lever 7 and switch 7.
Even if -1 or 7-2 is opened and the gate input to the thyristor 21 is removed, the thyristor 21 remains conductive and keeps the misfire circuit 5 inoperative. Therefore, there is no inconvenience when driving.

On the other hand, if you make a mistake in the starting operation and start the engine without operating the brake lever 7, the thyristor 21 of the control circuit 6 will not be conductive.
Point 5a of misfire circuit 5 is not grounded. Therefore,
As the engine speed increases, capacitor 1
When the charging voltage of 7 increases and its terminal voltage Vc exceeds the Zener voltage Vz of the Zener diode 18, the thyristor 19 is turned on, the transistor 20 is turned on, and the point 1a of the ignition circuit 1 is grounded through the transistor 20. . Since the above-mentioned thyristor 19 continues to maintain the on state as long as a voltage is induced in the pulsar coil 2-2, the charge in the charging/discharging capacitor 15 of the ignition circuit 1 is discharged via the transistor 20, and from then on, the capacitor 15 is When the battery is no longer charged, the engine stops rotating. Therefore, by setting the misfire circuit 5 to operate at a speed below the engine speed at which the Zener voltage is clutched in, the engine will stop immediately after the engine speed reaches a certain speed below the predetermined speed after starting. I will do it.

Reference numeral 14 in FIG. 3 is a case housing a printed circuit board on which the ignition circuit 1, misfire circuit 5, and control circuit 6 are wired.

In short, the front brake switch 7-1 and the rear brake switch 7-2 may be other switches as long as they can detect whether or not the torque generated by the engine is in a state capable of being transmitted to the driving wheels. For example, Stots Plump,
It can be used in common with a switch for turning on/off a lamp indicating the engaged/disconnected state of the clutch or a lamp indicating the neutral state of the transmission.

As described above, if the engine is started in a state where the engine torque is transmitted to the drive wheels by mistake, the present invention will automatically start the engine before the engine speed increases to a predetermined speed that can drive the drive wheels. Therefore, after starting, for example, in a car that transmits the engine's driving force to the transmission via a fluid coupling, a car with an automatic centrifugal clutch, or a car with a manual clutch, put the clutch in and press the accelerator.
Even if you operate 3 to rapidly increase the engine speed, the car will not start. Furthermore, since the engine stops when it reaches a certain number of revolutions, over-speeding immediately after starting in a cold state is eliminated, and the load on the engine before it warms up can be reduced.

Furthermore, as described above, if the engine is started incorrectly, the engine will stop at a low RPM range, so the engine starting device of the present invention is suitable for both self-starter and kick starter starting methods and is effective when implemented in vehicles that are equipped with both of the above starting methods.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an electric circuit showing an embodiment of the starting device of the present invention, Fig. 2 is a specific configuration diagram of the electric circuit, and Fig. 3 is a side view of a motorcycle to which the starting device of the present invention is applied. . 1 is an ignition circuit, 2 is an alternator, 3 is an ignition coil, 4 is a spark plug, 5 is a misfire circuit, 6 is a control circuit, 7-1 and 7-2 are switches that open and close in conjunction with the brake lever. , 8 is the ignition switch, and 9 is the battery.

Claims (1)

[Scope of Claim for Utility Model Registration] An ignition circuit for the engine, a switch that detects whether the torque generated by the engine is ready to be transmitted to the drive wheels, and a switch that detects whether the engine is ready to transmit the torque generated by the engine to the drive wheels. When the detection switch detects that engine torque is not transmitted to the drive wheels, the misfire circuit is deactivated and the engine is started, and the detection switch detects that engine torque is not transmitted to the drive wheels. An engine starting device consisting of a control circuit that activates a misfire circuit when a misfire is detected.