JPS6095180A - Fuel supply device - Google Patents

Abstract

PURPOSE:To enable the fuel to be supplied from an auxiliary tank so as to easily switch the supply of fuel in emergency, by stopping a solenoid fuel pump when a residual amount of fuel decreases below a fixed level and driving again the solenoid fuel pump by a manual switch. CONSTITUTION:A fuel tank in a motorcycle engine comprises a first tank 2 in the upper part and a second tank 4 in the bottom part connected to each other through a pipe 7, and a solenoid pump 10 forces fuel, sucked from the second tank 4 throuth a filter 8 and a pipe 9, to be fed to a carburetor 12. A fuel residue sensor 13 is provided in the tank 2. A control unit 16 controls the solenoid pump 10 while picking up an engine speed signal from the connection point between an igniter 17 and an ignition coil 18. Then the control unit, if the fuel residue sensor 13 shows a residual amout of fuel below the fredetermined level, both turns on a warning lamp 14 and stops the solenoid pump 10. Then a driving instruction, if a switch 19 is turned on, is fed to the solenoid pump 10 in any case.

Description

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

(Conventional technology) For motorcycles that do not have a fuel gauge.

When the remaining amount of fuel is low, the engine is made to exhibit a gas starvation condition to notify the driver of the condition. For example, the structure for this purpose is
Two fuel outlets are installed in the fuel tank, which has internal height differences, and the fuel is first sucked out from the higher fuel outlet, and when fuel can no longer be sucked out from the fuel outlet, a gas shortage occurs. In this state, turn the cock toward the lower fuel outlet to remove the remaining fuel from the lower fuel outlet. I took out the +1 reserve fuel and tried to survive the emergency situation.

Therefore, when the engine is running out of gas, it is desirable to stop the engine and turn off the cock, but this is not always the case when driving on a highway. If it is not possible to stop the vehicle easily, it is inconvenient to check the position of the cock by hand while driving.

(Object of the Invention) This invention was made in view of the above points, and it automatically causes the engine to run out of gas when a certain amount of fuel remains in the cap, and also controls the carburetor or fuel injection It is an object of the present invention to provide a fuel supply device that can easily switch fuel supply to the device from a main portion of a fuel tank to an auxiliary portion.

In order to achieve the above object, the present invention includes a fuel tank, a fuel feeding means for forcibly feeding fuel from the fuel tank to a carburetor or a fuel injection device, and a fuel tank in the fuel tank. a fuel detection means for electrically detecting the amount of fuel used in the engine; and an engine rotation speed detection means for detecting the rotation speed of the engine.
Based on at least one of a signal output from the engine speed detection means indicating the engine stopped state and a signal output from the fuel detection means indicating that the remaining amount of fuel has become below the set value, the The present invention is characterized in that it includes a control means for stopping the fuel supply means, and a drive start means for issuing a signal for re-driving the fuel supply means that has been temporarily stopped by the control means.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the accompanying drawings.

1 to 6 show a fuel supply system according to an embodiment of the present invention, in which reference numeral 1 indicates a seat, and a first fuel tank 2 is mounted on a frame 3 in front of the seat 1. A second fuel tank 4 is attached to the first fuel tank 2 and surrounded by a frame 3. The second fuel tank 4 is bolted to the frame 3, and its -1
It has a fuel fuel inlet 5 at one end and a fuel outlet 6 at its lower end. This fuel inflow 15 is connected to the first fuel tank 2 via the pipe 7, and the first fuel tank 2 and the second fuel tank 4 are integrated into a fuel tank device. is formed. Further, the fuel flow II flow 16 is connected to the filter 8, and this fuel outlet is further connected to the suction +:+10a at the end of the electromagnetic pump 10F via a pipe 9.

'+1 magnetic pump 10 is fixed to the frame 3 on the right side opposite to the second fuel tank 4, and the upper end of the delivery U
l Ob is connected to the vaporizer 12 via pipe ll. This electromagnetic pump IO functions as a fuel supply device that pumps the fuel sucked from the second fuel tank 4 to the carburetor 12. Note that a fuel injection device may be used instead of the carburetor 12.

A sensor 13 is installed at the bottom of the first fuel tank 2 to detect the remaining amount of fuel.

For example, a thermistor is used as the sensor 13, and when this thermistor generates heat, its resistance value decreases, and when it cools, its resistance value increases. Incidentally, the sensor 13 is not limited to a nermistor, and may be a sensor configured to move a float switch f1 when only turning on and off a lamp is required.

Further, the position of the sensor 13 at the 4=1 position is not limited to the first fuel tank 2. For example, by reducing the capacity of the first fuel tank 2,
If the second fuel tank 4 is made larger or if the second fuel tank 4 is divided into a plurality of parts, it can be attached to the second fuel tank 4. In these cases, when the lowest position of the fuel tank device is lower than the carburetor 12, the sensor 13 may be installed at a position where the reservoir capacity can be secured. For example, the side wall or ceiling of a portion of the second fuel tank 4 may be considered.

One end f- of the sensor 13 is grounded, and the other terminal is connected to a power source 15 via a warning light 14. The control unit l-16 picks up the remaining fuel, lii, and e1 from the connection point between the sensor 13 and the warning light 14, and starts the engine from the connection point between the igniter 17 and the ignition coil 18. The electromagnetic pump IO is controlled while picking up the speed signal. This control unit 71-16 is connected to the power supply 1; i15 via the electromagnetic pump drive switch 19, and when this switch 19 is closed, the remaining fuel is removed! The electromagnetic pump IO is driven regardless of the signal indicating the +1 state.

The electromagnetic pump drive switch 19 is operated by R motion, and is provided on the right handle switch part 20a of the handlebar 20, as shown in FIG. 5, so that the rider can easily operate it while driving. It is. 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 need to be used all the time, it is possible to provide it on the traveling direction side and display a lamp on the needle base 20b when the electromagnetic pump drive switch 19 is closed. It will be done. Further, the electromagnetic pump drive switch 19 may be provided on the left handle switch portion 20C, and may also be provided at a location other than these handle switch portions 20a and 20c, such as the needle base 20b, the -1 part 2a of the @1 fuel tank 2, or It may be provided in an easily accessible location near the handle grip, such as the seven-piece bracket 20d of the handlebar 20.

Next, the circuit of the control unit 16 will be explained based on FIG. The reference numeral 21 in the figure is a transistor, and this I.
The emitter of the transistor 21 is connected to the power supply 15 via the GIOs 1 and 22, the base is connected to the emitter of the transistor 23, and the collector is connected to the ground terminal via the excitation coil 25 that opens and closes the contact 24 that drives the electromagnetic pump IO. connected to f-.

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

30.31 is a resistor, 32 is a capacitor, and the capacitor 32
is connected to the power supply 15, and when the transistor 28 is in a conductive state, a voltage divided by the resistors 30 and 31 is applied to charge the transistor. This capacitor 32 is charged with a predetermined value.
11, for example, about 5 seconds, and at least
This is so that transistors 21 and 23 are conductive during p7.

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 voltage [15]. The output terminal r- of the comparator 35 is connected to the I transistor 38.
is connected to the base of the circuit via a resistor 39. The collector of the transistor 38 is connected to the base of the transistor 28 via a diode 40 and a resistor 41. 42.
43.44. 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 source 15 is connected to the control unit 16, the warning light 14, and the ignition coil 18.
etc. to supply power.

At this time, if the fuel completely covers the sensor 13, that is, if the fuel remains in the first fuel tank 2, the sensor 13 will be cooled by the fuel. It exhibits a large resistance value, and a low level current is output from the comparator 35 to keep the l transistor 38 in a non-conductive state.

As a result, the voltage of the power supply 15 is applied to the base of the - transistor 28, the potential rises to 1, and the I transistor 28 becomes conductive. When transistor 28 becomes conductive, resistor 30
．． A current flows through the capacitor 31, and its partial voltage is applied to the capacitor 32, so that the capacitor 32 starts charging. At this time, the transistors 2, 1, 23 also become conductive to excite the excitation coil 25, and the contacts 24 close to drive the electromagnetic pump 10.

The driving time of this electromagnetic pump IO 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 lo is that if the fuel pipe is not filled with fuel, the starter motor will continue to rotate until the fuel reaches the engine, or the king pedal must be operated repeatedly. This is because it must be done.

When the capacitor 32 finishes charging, ]・Runcistor 21
, 23 become non-conductive and the excitation coil 25 is de-energized, and as a result, the contact 24 opens and the electromagnetic pump IO stops. When the starter motor or kink pedal is operated to supply current to the ignition coil 18, 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 1 inch 19 for driving the electromagnetic pump 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 (114) decreases and the current...!
11 increases, the warning light 14 lights up, and the comparator 3
Lower the input potential of 5.

When fuel consumption progresses and most of the sensor 13 is exposed and the warning light 14 lights up brightly, the comparator 3
The output from 5 goes high, rendering transistor 38 non-conductive and lowering the base potential of transistor 28.

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, causing the transistors 21 and 23 to become non-conductive, thereby stopping 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.
The electromagnetic pump 10 is driven regardless of whether I remains. In this state, the warning light 14 is on, and by simply confirming that there is less fuel remaining, the vehicle can continue driving without running out of gas.

Also, if the engine stops, the capacitor 32
The battery will remain charged.

Transistors 21 and 23 conduct J1, stopping the electromagnetic pump 10 and preventing fuel from overflowing.

According to this embodiment, the first fuel tank 2 and the second fuel tank 4 constitute a fuel tank system 7j, and the second fuel tank is arranged using an extra space in the vehicle body. This makes it easier to secure a space for the fuel tank device.

(Effects of the Invention) As described above, the present invention electrically detects when the residual acid in the fuel in the fuel tank becomes less than a set value, and uses the resulting signal and engine speed detection means to The fuel supply is controlled by the detection signal of at least one of the signals indicating the engine stop condition 71, and the once stopped fuel supply is restarted by the signal output from the drive start means. The feeding can be automatically controlled by electrical signals depending on the amount of fuel remaining in the fuel tank. In addition, the drive start means for restarting fuel supply can be installed near the handle, which is easy for the driver to operate, making it easy to transfer fuel from the main part of the fuel tank to the auxiliary part. As it becomes,
It is possible to improve the operability during driving.

Furthermore, there are fewer restrictions on the location and shape of the fuel tank, which has the advantage of allowing greater flexibility in vehicle design.

[Brief explanation of the drawing]

Fig. 1 is a front view of an automatic wheel +I according to the present invention, Fig. 2 is a -IZ plane view of the main parts in Fig. 1, and Fig. 3 is a side view of a reserve tank and an electromagnetic pump. Fig. 4 is a top view of the main part of this invention, Fig. 5 is a +E view of the handle of the motorcycle 11 (with an electromagnetic pump attached), and Fig. 6 is a circuit diagram of the controller. 1st fuel tank 4... 2nd fuel tank lO... electromagnetic pump 13... sensor 14... warning light 15... power supply 16... control unit

Claims (1)

[Claims] A fuel tank, a fuel feeding stage for forcibly feeding fuel from the fuel tank to a carburetor or a fuel injection device, and a fuel detection means for electrically detecting the remaining amount of fuel in the fuel tank. and an engine rotation speed detection means for detecting the rotation speed of the engine, a signal outputted from the engine rotation speed detection means indicating a state of engine stop, and a remaining amount of fuel outputted from the fuel detection means at a set value. At least one of the signals indicating that the
A fuel supply device comprising a control means for stopping the fuel supply means, and a drive start means for issuing a signal for driving the fuel supply means which has been stopped by the first stage of control.