KR100411805B1 - Preventive device of loss and leakage in fuel - Google Patents

Abstract

The present invention provides a fuel loss and leakage prevention device, in particular, a fuel line that is troubled with the injector of the fuel supply line or the sealing of the injector when fuel is supplied from the fuel tank to the engine, or is discharged to the atmosphere when the injector is replaced. The present invention relates to a fuel loss and leakage prevention device for minimizing fuel consumption of a gas phase. According to the fuel loss and leakage prevention device of the present invention, a fuel shutoff valve is installed at a shortest distance where a fuel supply line, a fuel return line, and an injector are combined. This prevents the fuel loss that occurs when replacing the injector and prevents the leakage of fuel that may occur between the injector and the fuel line due to the bending of the fuel line, thereby reducing fuel loss and preventing safety accidents due to flammable high pressure gas. It has a great effect.

Description

Fuel Loss and Leakage Protection {PREVENTIVE DEVICE OF LOSS AND LEAKAGE IN FUEL}

The present invention relates to a device for preventing fuel loss and leakage, and in particular, when supplying fuel from a fuel tank to an engine, when injecting a fuel supply line or a problem in sealing of the injector or replacing an injector, the fuel supply line It relates to a fuel loss and leakage prevention device to minimize the consumption of fuel present in the.

As shown in FIG. 1, a high pressure fuel injection device of an engine having a conventional liquid injection LPG fuel supply method includes: a fuel tank 10 storing fuel for driving an engine (not shown); A fuel pump 20 which receives and receives a control signal for supplying fuel stored in the fuel tank 10 to the engine; A shutoff valve 30 which opens and shuts off the fuel supplied from the fuel pump 20 by a control signal; An injector 40 for injecting a control signal from the fuel supplied through the shutoff valve 30 and injecting the fuel into an engine; A fuel supply line 50 fastened between the shutoff valve and the injector so that fuel supplied from the shutoff valve can be supplied to the injector; The injector 40 receives a residual fuel remaining after the fuel is injected into the engine, while the pressure adjusting unit 60 adjusts the pressure so that the fuel stored in the fuel tank 10 can be constantly supplied to the outside. )Wow; A fuel return line (70) fastened between the injector (40) and the pressure adjuster (60) to supply the remaining amount after injecting the fuel from the injector (40) to the pressure adjuster (60); A pressure sensor 80 for detecting a pressure in the fuel tank 10 and outputting a detection signal; It is configured to include an ECU (Engine Control Unit) (80) for receiving the detection signal from the pressure sensor 80 and outputs a control signal corresponding thereto.

That is, the operation process of the high-pressure fuel injection device of the engine having a conventional liquid injection LPG fuel supply method, when the pressure sensor 80 detects the pressure inside the fuel tank 10 and outputs a detection signal, ECU (90) In response to the detection signal from the pressure sensor 80 outputs a corresponding control signal.

Then, the fuel pump 20 receives a control signal from the ECU 90 and sucks the fuel stored in the fuel tank 10 to supply an engine (not shown), and the shutoff valve 30 supplies the ECU. Receiving a control signal from the 90 to open or shut off the valve so that the fuel supplied through the fuel pump 30 can be supplied to the engine.

Subsequently, the injector 40 receives a control signal from the ECU 90 and injects the fuel supplied through the shutoff valve 30 and the fuel supply line 50 to the engine so that a vehicle (not shown) can be driven. After that, the remaining amount is circulated to the fuel tank 10 through the fuel return line 70.

On the other hand, the pressure adjusting unit 60 receives the remaining fuel after injecting the fuel from the injector 40 through the fuel return line 70 to be supplied again to the fuel tank 10, while the LPG fuel The pressure is adjusted to about 5 bar higher than the pressure in the fuel tank 10 to maintain the liquid phase.

However, the high-pressure fuel injection device of the engine having the conventional liquid injection LPG fuel supply method as described above, if an abnormality occurs in the injector for injecting fuel into the engine, the fuel shutoff valve is shielded to the fuel supply line and the fuel return line. Since the injector needs to be replaced after the remaining fuel is consumed or discharged into the atmosphere, there is a problem in that a large fuel loss occurs due to the length between the fuel shutoff valve and the injector.

In addition, a common O-ring (0-ring) is used for sealing between the injector and the fuel line. At this time, the supporting distance between the O-ring and the fuel line is short, so that the fuel lines may suddenly bend at the connection portion with the O-ring. And there was a problem that the fuel may leak from the bent portion of the O-ring and fuel lines.

Therefore, the present invention is to solve the conventional problems as described above, an object of the present invention is to install a fuel shutoff valve at the shortest distance coupled to the fuel supply line and the fuel return line and the injector fuel loss when replacing the injector On the other hand, to provide a fuel loss and leakage prevention device to prevent the fuel leakage between the injector and the fuel line due to the bending of the fuel line.

In order to achieve the above object, the present invention is a fuel loss and leakage prevention device, in the injector and fuel supply line and fuel return line of the high-pressure fuel supply device,

A first support portion having a hole formed at a center thereof to be bolted to the injector, and having grooves formed at both sides to vertically support the fuel supply line and the fuel return line;

A second support part having grooves formed at both sides thereof to vertically support the fuel supply line and the fuel return line;

A fixing plate comprising a fastening part for fastening the first and second support parts;

First and second fuel supply lines or fuel return lines fastened to the grooves of the first and second support parts to open / close fuels according to fuel supply and fuel return by a control signal or manual control of the ECU; And a second fuel valve.

1 is a block diagram showing a conventional vehicle fuel supply device,

2 is a block diagram showing a fuel loss and leakage prevention apparatus according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: fixing plate 110: first support portion

120: second support portion 130: fastening portion

200: first fuel valve 300: second fuel valve

Hereinafter, the fuel loss and leakage preventing apparatus of the present invention according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram showing a fuel loss and leakage prevention device.

As shown in FIG. 2, the present invention includes a fixed plate 100, a first fuel valve 200, and a second fuel valve 300, and the fixed plate 100 includes a first support 110 and a second support valve. Comprising a support portion 120 and the fastening portion 130, the first support portion 110 of the fixing plate 100 is formed with a hole in the center so as to be fastened to the injector with a bolt, grooves are formed on both sides It serves to vertically support the fuel supply line and the fuel return line.

In addition, the second support part 120 has grooves formed at both sides to serve to vertically support the fuel supply line and the fuel return line, and the fastening part 130 is the first support part 110 and the second. It serves to fasten the support 120.

Meanwhile, the first fuel valve 200 and the second fuel valve 300 are fastened between the fuel supply line or the fuel return line fastened to the grooves of the first support 110 and the second support 120. It opens / closes fuel according to fuel supply and fuel return by control signal of ECU.

Hereinafter, the operation of the fuel loss and leakage prevention device configured as described above is as follows.

The fuel pump 20 receives a control signal from the ECU 90 when the engine is driven and sucks the fuel stored in the fuel tank 10 to supply an engine (not illustrated) to the engine (not shown). The control signal is input from the ECU 90 to open or shut off the valve so that the fuel supplied through the fuel pump 30 can be supplied to the engine.

Subsequently, the injector 40 receives a control signal from the ECU 90 and injects the fuel supplied through the shutoff valve 30 and the fuel supply line 50 to the engine so that a vehicle (not shown) can be driven. After that, the remaining amount is supplied to the fuel tank 10 again through the fuel return line 70.

At this time, the fuel supply line 50 and the fuel return line 70 is a hole formed in the center of the first support portion 110 of the fixing plate 100 to be fastened while requiring sealing with the injector 40 Fasten by fixing to one side of the injector.

Subsequently, the fuel supply line and the fuel return line are inserted into the grooves formed on both sides of the first support part 110 and the second support part 120 so as to be supported in the vertical direction.

In addition, the fastening part 130 fastens the first support part 110 and the second support part 120 to each other so that the fuel supply line and the fuel return line may be vertically maintained for a predetermined length or more, and the first support part ( The first fuel valve 200 and the second fuel valve 300 are fastened between the fuel supply line and the fuel return line sandwiched between the first and second support parts 120 and 110.

Subsequently, the first fuel valve 200 and the second fuel valve 300 open / close the fuel supply and fuel return by receiving the control signal of the ECU or manually. That is, when an abnormality occurs in the injector, the supply and return of fuel are blocked by the first fuel valve 200 and the second fuel valve 300 installed at the shortest distance to the injector by a control signal of the ECU or a manual operation. By doing so, it is possible to prevent fuel loss occurring when replacing the injector.

In addition, since the fuel supply line and the fuel return line are vertically maintained at a predetermined distance or more from the first support part 110 and the second support part 120, the fuel is prevented from being bent by an external shock or the length of the valve. It can prevent leakage.

On the other hand, the pressure regulator 60 receives the remaining fuel after injecting the fuel from the injector 40 through the fuel return line 70 to be supplied again to the fuel tank 10, while the LPG fuel The pressure is adjusted to about 5 bar higher than the pressure in the fuel tank 10 to maintain the liquid phase.

As described above, the fuel loss and leakage preventing device of the present invention prevents fuel loss caused by replacing the injector by installing a fuel shutoff valve at the shortest distance where the fuel supply line, the fuel return line, and the injector are combined. By preventing the fuel leakage between the injector and the fuel line due to the bending of the fuel line, there is an excellent effect that it is possible to reduce fuel loss and to prevent safety accidents due to flammable high pressure gas.

Claims (1)

In the injector, fuel supply line and fuel return line of the high pressure fuel supply device, A first support portion having a hole formed at a center thereof to be bolted to the injector, and having grooves formed at both sides to vertically support the fuel supply line and the fuel return line; A second support part having grooves formed at both sides thereof to vertically support the fuel supply line and the fuel return line; A fixing plate comprising a fastening part for fastening the first and second support parts; First and second fuel supply lines or fuel return lines fastened to the grooves of the first and second support parts to open / close fuels according to fuel supply and fuel return by a control signal or manual control of the ECU; A fuel loss and leakage prevention device, characterized in that it comprises a second fuel valve.