JPS6220954B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a side stand up running prevention device that makes it impossible for a motorcycle to run with the side stand up.

When riding a motorcycle, it is necessary to put the side stand in the stowed position. However, if you forget to stow the side stand and drive with it up, the side stand may come into contact with a protruding object on the road. It may damage the side stand.

Further, when a starter motor is provided, it is desirable to enable the starter motor to start only when the transmission is in a neutral state to prevent the vehicle body from moving unexpectedly. However, under certain conditions, for example, when restarting the engine after stopping at a traffic light with the stand retracted, it may be possible to start the starter motor with the stand retracted and the transmission in a non-neutral state. desired.

The present invention has been developed in view of these circumstances, and enables fine-grained control such as making it impossible to drive with the side stand in the upright position, but allowing the vehicle to start with the stand retracted under certain conditions. An object of the present invention is to provide a device for preventing running while standing on a side stand in a motorcycle.

According to the present invention, this object is to provide a motorcycle having an electronic ignition device and a starter motor, with a stand switch that is linked to raising and storing a side stand, a clutch or brake switch that is linked to a clutch or brake, and a transmission. and a neutral switch that detects the neutral state of the transmission, and enables the ignition device to ignite only when the transmission is neutral or stored on the stand, and only when the transmission is neutral or stored on the stand and the clutch is disengaged or the brake is applied. This is achieved by a sidestand running prevention device for a motorcycle, characterized in that the switches are configured to work together so as to enable the starter motor to start.

The present invention will be explained in detail below based on the drawings.

Fig. 1 is a side view of a motorcycle to which an embodiment of the present invention is applied, Fig. 2 is an overall circuit diagram of the side stand upright running prevention device, and Fig. 3 is a circuit showing the configuration of the igniter of the electronic ignition device. It is a diagram.

In FIG. 1, numeral 10 is a cradle type main frame, 12 is a down tube, and the rear part of the down tube 12 is a seat pillar 14 bent upward. 16 is an engine, 18 is a rear wheel held by a rear arm 20, 22 is a front wheel held by a front fork 24, 26 is a fuel tank, and 28 is a seat.

Reference numeral 30 denotes a side stand, and this side stand 30 is rotatably pivoted to a bracket 32 fixed to the down tube 12, and is stopped in an upright position and a stored position (imaginary line position) by a coil spring (not shown). I'm starting to do that.

Reference numeral 34 denotes a stand switch fixed to the bracket 32, and the side stand 30 comes into contact with the stand switch 34 when the side stand 30 is in the folded storage position, and the stand switch 34 is closed at this time.

In FIG. 2, 40 is an ignition coil, 42 is a battery connected in series to the primary side of this ignition coil 40 via a main switch 44 and a fuse 46;
48 is an ignition plug connected to the secondary side (high voltage side) of the ignition coil 40, and 50 is an igniter interposed between the connecting portion 52 of the primary and secondary sides of this ignition coil 40 and the ground. , these form a known electronic ignition device.

The igniter 50 can be of the full transistor type shown in FIG. 3, for example. In this figure, 54 is a pickup coil that detects an ignition signal based on the rotation of the crankshaft. 56 is a waveform shaping circuit, 58 is a control circuit, 60 is a power transistor, and 62 is a power supply circuit. The collector of the power transistor 60 is connected to the connection portion 52 of the ignition coil 40, and the emitter is grounded.

The ignition signal detected by the pickup coil 54 is shaped into a predetermined waveform by the waveform shaping circuit 56, and then
In the control circuit 58, predetermined advance angle control and closing angle control are performed according to operating conditions such as engine rotational speed. The power transistor 60 is controlled on/off by the output of the control circuit 58.
As a result, the primary current flowing through the primary side of the ignition coil 40 is interrupted, and an electric spark is generated at the ignition plug 48.

The power supply circuit 62 uses the battery 42 as a power source and includes a power supply limiting resistor 64 in series and a constant voltage diode 66 in parallel.The voltage of the battery 42 is maintained at a constant voltage by the constant voltage diode 66, and an output point 68 on the cathode side thereof. is supplied to each part.

In FIG. 2, a stop circuit 70 includes the stop switch 34 and the electromagnetic relay 72 described above. That is, the excitation coil 7 of the electromagnetic relay 72
4 is connected in series with the stand switch 34, while a normally closed contact 76 opened and closed by the excitation coil 74 is interposed between the output point 68 of the power supply circuit 62 and ground.

In FIG. 2, 80 and 82 are a neutral lamp and a neutral switch that are connected in series, and the connection portion between them is connected to the excitation coil 7.
4 and the stand switch 34 via a diode 84. This diode 8
4 has the function of exciting the excitation coil 74 when the neutral switch 82 is closed, and preventing the neutral lamp 80 from lighting when the stand switch 34 is closed. Note that the neutral switch 82 is closed when the transmission is in the neutral position.

90 is a starter relay, 92 is a starter motor, and a normally open point 94 of the starter relay 90 is interposed between the battery 42 and the starter motor 92. 96 is a starter stop relay; 98 is a starter button;
The normally open point 100 and the starter button 98 are connected in series with the excitation coil 102 of the starter relay 90 to intermittent the excitation current to the coil 102.
Excitation coil 104 of starter relay 96
One end is connected to the terminal on the battery 42 side of the normally open point 100, and the other end is connected to the clutch switch 10.
6 to the anode side of the diode 84, and the diode 108 to the cathode side of the diode 84, respectively.

Next, the operation of this embodiment will be explained. When the side stand 30 is raised, the stand switch 34 is open, but if the transmission is in the neutral position, the vehicle will not start even if the engine 16 starts. At this time, since the neutral switch 82 is closed, current flows through the excitation coil 74 via the diode 84 and the neutral switch 82, and the normally closed contact 7
6 opens. Therefore, the output point 68 of the power supply circuit 62 is not grounded and the igniter 50 is activated, so that the engine can be started by a starting operation. Note that at this time, the neutral lamp 80 is lit.

If you move the transmission to a position other than neutral with the side stand 30 upright, the stand switch 34
Since both the neutral switch 82 and the neutral switch 82 are opened and the coil 74 is de-energized, the normally closed contact 76 is closed. Therefore, the output point 68 of the power supply circuit 62 becomes the ground potential, and the igniter 50 becomes inoperable. Therefore, in this state, the engine 16 cannot be started.

When the side stand 30 is folded down and stored, the stand switch 34 is closed, so the coil 7 is closed regardless of whether the neutral switch 82 is opened or closed.
4 is energized, the normally closed contact 76 is opened, and the igniter 50 is activated. In other words, it becomes possible to run.

Also, the starter start relay 96 is activated only when the transmission is in the neutral position and the neutral switch 82 is closed, and when the side stand 30 is retracted and the stand switch 34 is closed and the clutch is disengaged and the clutch switch 106 is closed. Coil 104 is energized and normally open point 100 is closed.
Except for these two cases, the normally open point 100 is open, so even if the starter button 98 is operated, the starter relay 90 does not operate and the starter motor 92 does not rotate. By making it possible to start the engine only when the transmission is in the neutral position or when the side stand is stowed and the clutch is released, it is possible to reliably prevent the vehicle from moving forward unexpectedly when the engine is started. I can do it.

Furthermore, since the stand switch 34 is combined with the neutral switch 82, if the transmission is in the neutral position, it is possible to start the engine 16 with the side stand 30 erected, which is particularly convenient during engine maintenance work.

Further, in this embodiment, the normally closed contact 76 is connected to the power supply circuit 6.
The igniter 50 was configured to be inoperable by interposing it between the output point 68 of No. 2 and the ground, but as shown by the imaginary line in FIG. transistor 6
Even if it is connected to the base 86 of 0, the desired effect can be obtained. In addition, as shown by the virtual line, base 8
It is suitable for protecting the power transistor 60 if a diode 88 is interposed between the base 86 and the normally closed contact 76 to prevent negative voltage noise or the like from being applied to the base 86.

Although a full transistor type ignition device was used in the above embodiment, it is of course applicable to a semi-transistor type ignition device using a mechanical point in the distributor.

As described above, this invention includes a stand switch,
It is equipped with a clutch, brake switch, and neutral switch, and can only be ignited when the transmission is in neutral or when the stand is retracted, so it is impossible to drive with the side stand up, and if the side stand is turned off by an object such as a protrusion on the road. This prevents damage from being caused.

Furthermore, the starter motor can only be started in the following cases. That is, only in the following cases: a) when the transmission is in neutral, b) when the stand is stowed and the clutch is disengaged or the brake is activated and travel is restricted. Therefore, there is no risk of the vehicle moving unexpectedly when the engine is started, and even if the engine suddenly stops due to a traffic signal or the like, it can be restarted quickly by simply operating the clutch or brake. As described above, the present invention allows fine control to be performed by cooperating the stand switch, clutch or brake switch, and neutral switch, so that operability is desirable during actual driving.

[Brief explanation of the drawing]

FIG. 1 is a side view of a motorcycle to which an embodiment of the present invention is applied, FIG. 2 is an overall circuit diagram of the side stand upright running prevention device, and FIG. 3 is a diagram showing the configuration of the igniter. 30...side stand, 34...stand switch, 50...igniter, 82...neutral switch, 106...clutch switch.

Claims (1)

[Scope of Claims] 1. In a motorcycle having an electronic ignition device and a starter motor, a stand switch that is linked to raising and storing a side stand, a clutch or brake switch that is linked to a clutch or brake, and a neutral shift of a transmission. a neutral switch that detects the state of the ignition device, which enables the ignition device to ignite only when the transmission is in the neutral position or when the transmission is placed on the stand; 1. A side stand up running prevention device for a motorcycle, characterized in that the switches are configured to work together so that the motor can be started.