JPH0510500B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention mainly relates to a fuel supply device for a motorcycle.

[Prior art] For motorcycles that are not equipped with a fuel gauge,
When the amount of fuel remaining is low, the engine is made to temporarily exhibit a gas starvation condition to notify the driver of the condition. For example, a structure for this purpose is to provide two fuel outlet ports in a fuel tank that has internal height differences, to first suck out fuel from the fuel outlet at a higher position, and then to draw fuel from the fuel outlet port at a higher position. When it can no longer be sucked out, it causes a gas shortage condition, and in this state,
By switching the fuel outlet to the lower fuel outlet, the remaining reserve fuel can be taken out from the lower fuel outlet to survive emergencies.

[Problems to be Solved by the Invention] Therefore, in a motorcycle with this type of structure, when the engine shows a gas shortage condition, it is desirable to stop the engine and then switch the engine. In cases where it is not always easy to stop the vehicle, it is inconvenient to have to manually check the location of the vehicle while driving.

In addition, when the engine is temporarily running out of gas to notify the driver of the situation, it is necessary to warn the driver well in advance of the engine running out of gas and have the driver replenish the fuel. There is.

This invention was made in view of the above points, and is a fuel supply that has a simple structure and can warn the driver well in advance before the fuel actually runs out and allow the driver to replenish the fuel. The purpose is to provide equipment.

[Means for Solving the Problems] In order to solve the problems described above, a fuel supply device of the present invention includes a large-capacity first fuel tank, and a first fuel tank having a large capacity.
a small-capacity second fuel tank to which fuel is supplied from the fuel tank by its own weight; a fuel supply means for forcibly supplying fuel from the second fuel tank to the engine side; and fuel in the first fuel tank. a fuel detection means for detecting the remaining amount of fuel; a warning means for issuing a warning based on a warning signal indicating that the remaining amount of fuel outputted from the fuel detection means has become below a set value; and a warning means for issuing a warning based on the warning signal. 1 fuel supply stop means for stopping the operation of the fuel supply means when fuel is present in the fuel tank; and fuel supply once stopped by the fuel supply stop means by manual operation in a warning state of the warning means. It is characterized by comprising a fuel supply stop release means for re-driving the means.

[Function] The present invention includes a large-capacity first fuel tank and a small-capacity second fuel tank to which fuel is supplied from the first fuel tank by its own weight. Fuel is forcibly supplied to the engine by the fuel supply means. The remaining amount of fuel in the first fuel tank is detected by the fuel detection means, and a warning is issued based on a warning signal output from the fuel detection means indicating that the remaining amount of fuel has become below a set value. When one fuel tank is present, the operation of the fuel supply means is stopped, and the engine is temporarily caused to exhibit a gas starvation condition, thereby notifying the driver of the condition. Then, by manual operation of the fuel supply stop release means, the fuel supply means that has been temporarily stopped in the warning state is re-driven to enable operation of the engine and replenish fuel.

[Example] Hereinafter, an example of the present invention will be described in detail based on the accompanying drawings.

1 to 6 show a fuel supply system according to an embodiment of the present invention, in which reference numeral 1 is a seat, and a first fuel tank 2 is provided in front of the seat 1.
is fixed to the frame 3, and below the first fuel tank 2 is a second fuel tank 4 surrounded by the frame 3.
is provided. The second fuel tank 4 is bolted to the frame 3 and has a fuel inlet 5 at its upper end and a fuel outlet 6 at its lower end. This fuel inlet 5 is connected to the first fuel tank 2 via a pipe 7, and fuel is supplied from the large-capacity first fuel tank 2 to the small-capacity second fuel tank 4 by its own weight. The fuel tank 2 and the second fuel tank 4 are integrated to form a fuel tank device. Further, the fuel outlet 6 is connected to a filter 8, and further, this fuel outlet is connected via a pipe 9 to a suction port 10a at the lower end of the electromagnetic pump 10.

The electromagnetic pump 10 is fixed to the right side frame 3 on the opposite side to the second fuel tank 4, and has an upper end outlet 10b connected to the carburetor 12 via a pipe 11. This electromagnetic pump 10 constitutes a fuel supply means that pumps the fuel sucked up from the second fuel tank 4 to the carburetor 12 and forcibly supplies it from the second fuel tank 4 to the fuel engine side. Note that a fuel injection device may be used instead of the carburetor 12.

On the other hand, a sensor 13 for detecting the remaining amount of fuel is installed at the bottom of the first fuel tank 2, and this sensor 13 has fuel detection means for detecting the remaining amount of fuel in the first fuel tank 2. It consists of For example, a thermistor is used as this sensor 13, and when this thermistor generates heat, its resistance value decreases.
When cooled, the resistance value increases. Note that the sensor 13 is not limited to a thermistor, but may be a float that operates a reed switch when it is only necessary to turn on and off a lamp.

Then, one terminal of the sensor 13 is grounded,
The other terminal is connected to a power source 15 via a warning light 14, and this warning light 14 serves as a warning means for issuing a warning based on a warning signal output from the fuel detection means indicating that the remaining amount of fuel has fallen below a set value. It consists of The control unit 16 picks up a signal indicating the remaining amount of fuel from the connection point between the sensor 13 and the warning light 14, and also picks up a signal indicating the engine speed from the connection point between the igniter 17 and the ignition coil 18, and controls the electromagnetic pump 10. control the
It constitutes a fuel supply stop means that stops the operation of the fuel supply means when fuel is present in the first fuel tank 2 based on the warning signal. This control unit 16 is connected to the power source 15 via an electromagnetic pump drive switch 19, and when this electromagnetic pump drive switch 19 is closed, it drives the electromagnetic pump 10 regardless of the signal indicating the remaining amount of fuel. However, this constitutes a fuel supply stop release means for re-driving the fuel supply means once stopped by the fuel supply stop means by manual operation in the warning state of the warning means.

As described above, the electromagnetic pump drive switch 19 is manually operated, and as shown in FIG. 5, it is provided on the handle switch portion 20a on the right side of the handlebar 20 so that the rider can easily operate it while driving. It has been made possible to do so. This electromagnetic pump drive switch 19 employs, for example, a self-holding push button switch. In addition, since the electromagnetic pump drive switch 19 does not always need to be used, it is provided on the traveling direction side, and when the electromagnetic pump drive switch 19 is closed, the instrument panel 2
It is conceivable to display a lamp at 0b. Further, the electromagnetic pump drive switch 19 may be provided on the left handle switch portion 20c, or may be provided at a location other than these handle switch portions 20a, 20c, such as the instrument panel 20b, the upper part 2a of the first fuel tank 2, or the handle 20. It may also be provided in an easily accessible location near the handle grip, such as the upper bracket 20d.

Next, the circuit of the control unit 16 is
This will be explained based on the diagram. Reference numeral 21 in the figure is a transistor, the emitter of this transistor 21 is connected to the power supply 15 via a diode 22, the base is connected to the emitter of a transistor 23, and the collector is excited to open and close the contact 24 that drives the electromagnetic pump 10. It is connected to a ground terminal via a coil 25.

The base of transistor 23 is forwardly connected to the collector of transistor 28 via diode 26 and resistor 27, while the base and collector of transistor 23 are connected to bypass capacitor 29.
connected by.

30 and 31 are resistors, 32 is a capacitor, the capacitor 32 is connected to the power supply 15, and the transistor 2
When 8 is in a conductive state, the voltage divided by resistors 30 and 31 is heated to perform charging. A predetermined period of time, for example, approximately 5 seconds, for charging this capacitor 32 is ensured, and at least the transistor 2
1 and 23 are electrically connected. A connection point between the capacitor 32 and the resistor 31 is connected to the igniter 17 via a resistor 33 and a diode 34.

One input terminal of the comparator 35 is connected to the connection point between the sensor 13 and the warning light 14, and the other input terminal is voltage-divided by resistors 36 and 37 and connected to the power supply 15. The output terminal of the comparator 35 is connected to the base of a transistor 38 via a resistor 39. The collector of transistor 38 is connected to the base of transistor 28 by diode 4.
0, connected via a resistor 41. 42,4
3, 44 and 45 are capacitors for forming a time delay.

Next, the operation of this embodiment will be explained. When the main switch (not shown) is turned on, the power supply 1
5 supplies power to the control unit 16, warning light 14, ignition coil 18, etc.

At this time, if the fuel completely covers the sensor 13, that is, if there is sufficient fuel left in the first fuel tank 2, the sensor 13 will be cooled by the fuel. shows a large resistance value,
A low level current is output from the comparator 35 to keep the transistor 38 non-conductive.

As a result, the power supply 1 is connected to the base of transistor 28.
Once the voltage at 5 becomes high, the potential rises and the transistor 28 becomes conductive. When the transistor 28 becomes conductive, a current flows through the resistors 30 and 31, a partial voltage of which is applied to the capacitor 32, and the capacitor 32 starts charging. At this time, transistors 21 and 23
The contact point 24 is closed and the electromagnetic pump 10 is driven. The driving time of the electromagnetic pump 10 is determined by the charging time of the capacitor 32, and is set to about 5 seconds in this embodiment, for example. The reason why it takes time to drive the electromagnetic pump 10 is that if the fuel pipe is not filled with fuel, the starter motor must continue to rotate or the kick pedal must be repeatedly operated until the fuel reaches the engine. This is because it will not happen.

When the capacitor 32 has finished charging, the transistors 21 and 23 become non-conductive, and the excitation coil 25 is de-energized. As a result, the contact 24 opens and the electromagnetic pump 1
0 stops. Then, when a current is applied to the ignition coil 18 by operating the self-motor or the kick pedal, the capacitor 32 is discharged and returns to the initial state. Then, the electromagnetic pump 10 is driven until the capacitor 32 is charged again, and this operation is repeated. The operation in this case is performed regardless of whether the electromagnetic pump drive switch 19 is opened or closed. Next, when the fuel is consumed and a portion of the sensor 13 is exposed from the oil surface, the sensor 13 loses its cooling effect by the amount that is exposed, so the resistance value decreases and the amount of current increases. , the warning light 14 is turned on to lower the input potential of the comparator 35.

As fuel consumption progresses and most of the sensor 13 is exposed and the warning light 14 lights up brightly, the output from the comparator 35 becomes high level, making the transistor 38 non-conducting and turning off the transistor 2.
Lower the base potential of 8.

At this time, if the electromagnetic pump drive switch 19 is open, the base potential of the transistor 28 becomes the ground potential and becomes non-conductive, and the transistor 28 becomes non-conductive.
1 and 23 are made non-conductive to stop the electromagnetic pump 10. Therefore, the engine stops and runs out of gas.

When the electromagnetic pump drive switch 19 is closed, the base potential of the transistor 28 is maintained at a constant potential regardless of the operation of the transistor 38, and the electromagnetic pump 1
0 is driven. In this condition, the warning light 14
The light is on, and by simply confirming that the remaining fuel level is low, you can continue driving without running out of gas. Also, if the engine stops, the capacitor 32
remains charged, transistors 21 and 23 become non-conductive, stopping electromagnetic pump 10 and preventing fuel from overflowing.

According to this embodiment, the second fuel tank 2 of the first fuel tank 2
The fuel tank 4 constitutes a fuel tank device, and the second
Since the fuel tank is arranged using the extra space in the vehicle body, it is easy to secure a space for the fuel tank device.

[Effects of the Invention] As described above, the present invention includes a large-capacity first fuel tank and a small-capacity second fuel tank to which fuel is supplied from the first fuel tank by its own weight. Fuel is forcibly supplied from the second fuel tank to the engine by the fuel supply means, and the remaining amount of fuel in the first fuel tank is detected by the fuel detection means, and the remaining amount of fuel has become below a set value. In addition to issuing a warning based on a warning signal indicating that fuel is present in the first fuel tank, the fuel supply means stops operating when there is fuel in the first fuel tank, causing the engine to temporarily run out of gas, thereby ensuring a fuel warning to the driver. be able to.

Further, the fuel detection means detects the remaining amount of fuel in the first fuel tank, and issues a warning based on a warning signal output from the fuel detection means indicating that the remaining amount of fuel has become below a set value, Since the fuel supply is stopped and the engine is temporarily run out of gas, it is possible to warn the driver with a simple structure. In addition, since the remaining amount of fuel in the first fuel tank is detected, even if the oil level changes due to driving conditions and the remaining amount of fuel cannot be accurately detected, at least the remaining amount of fuel in the second fuel tank can be detected. Since this is ensured, the driver can be warned well in advance before the fuel actually runs out, and since a sufficient travel distance is ensured, the driver can be made to refuel.

In addition, manual operation of the fuel supply stop release means restarts the fuel supply means that was once stopped in the warning state, so even if the engine can be operated, it remains in the warning state and the driver forgets to refuel and does not actually refuel. It is possible to drive to a refueling location without running out of fuel.

[Brief explanation of the drawing]

Figure 1 is a front view of a motorcycle to which this invention is installed, Figure 2 is a plan view of the main parts in Figure 1, Figure 3 is a side view of the reserve tank and electromagnetic pump,
FIG. 4 is a front view of the main parts of the present invention, FIG. 5 is a front view of the handle portion of the motorcycle to which the electromagnetic pump is attached, and FIG. 6 is a circuit diagram of the controller. 2...First fuel tank, 4...Second fuel tank, 10...Electromagnetic pump, 13...Sensor, 14
... Warning light, 15 ... Power supply, 16 ... Control unit.

Claims (1)

[Claims] 1. A large-capacity first fuel tank, a small-capacity second fuel tank to which fuel is supplied by its own weight from the first fuel tank, and fuel forcibly supplied to the engine side from this second fuel tank. Based on a fuel supply means, a fuel detection means for detecting the remaining amount of fuel in the first fuel tank, and a warning signal output from the fuel detection means indicating that the remaining amount of fuel has become below a set value. warning means for issuing a warning; fuel supply stop means for stopping the operation of the fuel supply means when fuel is present in the first fuel tank based on the warning signal; 1. A fuel supply device comprising: fuel supply stop canceling means for re-driving the fuel supply means once stopped by the fuel supply stop means.