KR20020084382A - A fuel system for preventing lpg from leaking - Google Patents

Abstract

PURPOSE: A fuel system having an LPG(Liquefied Petroleum Gas) leakage preventing device is provided to prevent the injury on the human body due to a fire in a collision or an overturn of a vehicle by opening a gas charge valve only when the LPG is injected. CONSTITUTION: A solenoid valve(27) is installed in the position of a grip of a gas charge valve(20). The solenoid valve is operated by a controller(50), and selectively opens and closes a gas inlet of the gas charge valve. The controller is connected with an LPG charge detecting unit(60). A first and a second switch members(61,63) detect the opening of the door of an LPG filler and transmit signals to the controller. The controller analyzes the detecting signals transmitted from the switch members and operates the solenoid valve of the gas charge valve only when an engine is stopped, the door of the LPG filler is opened, and a signal for charging the LPG gas is transmitted.

Description

FUEL SYSTEM FOR PREVENTING LPG FROM LEAKING}

The present invention relates to a fuel device in which an LP gas leak prevention device is installed, and more particularly, by installing a solenoid valve in a gas filling valve, the structure of the gas filling valve so that an operator and a gas source can fill the LP gas without operating the gas filling valve. Relates to a fuel device equipped with an improved LPG gas leak prevention device.

In general, an LPG vehicle is an automobile that uses LP gas as fuel. The LLP vehicle requires related devices for using LLP gas as fuel as compared to a vehicle using gasoline or a vehicle using diesel.

As shown in FIG. 1, the devices related to Elpgi are mounted on one side of a Bombe 1 in which the Elpgi is stored and a supply pipe 2 connected between the Bombe 1 and the engine (not shown). Vaporizer 3 for depressurizing, vaporizing and regulating the pressure, a filter 4 for filtering impurities in the vellum, and a gas inlet valve 5 connected to one side of the bomber 1 for filling the lippage (6) is provided with a filling pipe (7).

Charging of the Elbow to the cylinder (1), after opening the handle 8 of the gas filling valve (5) shown in FIG. 1) to charge the vellum.

However, as described above, in order to charge the LPG, the filler opens and closes the gas filling valve 5 by hand every time the LPG gas is filled, so that the gas filling valve 5 is always open. .

Accordingly, when the LPI hose is torn when the vehicle collides with the vehicle or when the vehicle is overturned, the LPI is discharged into the interior and the atmosphere of the vehicle, thereby causing a human injury due to a fire.

The present invention has been made to solve the problems described above, by installing a solenoid valve in the gas filling valve to open the gas filling valve only when the injection of the LPG gas, the LLP occurs during vehicle collision and rollover It is an object of the present invention to provide a fuel device in which an LP gas leak prevention device is installed to prevent a human injury caused by a fire accident caused by a breakdown of an injection hose.

1 is a configuration diagram schematically showing the LLP fuel apparatus according to the prior art.

Figure 2 is a partial cross-sectional view schematically showing the gas filling valve of FIG.

Figure 3 is a schematic diagram showing a fuel device installed with an LPG gas leakage preventing device according to a preferred embodiment of the present invention.

4 is a partial cross-sectional view schematically showing the gas filling valve of FIG.

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

10. Bomb 20. Gas filling valve

27. Solenoid Valve 30. Strainer

40. Vaporizer 60. LPI Charging Determination Unit

61. First switch member 63. Second switch member

65. "L" terminal 67. Comparator

A fuel device equipped with an LP gas leakage preventing device of the present invention for achieving the above object is a filter, which is installed on a cylinder in which the LP is stored, the supply pipe connected between the cylinder and the engine to filter the LP filter, and In the fuel device for an Elpji vehicle comprising a vaporizer that vaporizes and pressure-controls the LPG supplied from the cylinder to the engine, and a filling pipe connecting the gas filling valve and the LPG charger installed in the bomb, the gas filling valve is installed in the gas filling valve A solenoid valve for selectively intercepting the inflow of the LPI flowing into the bomb; And a control unit connected to the solenoid valve and the LLP charging determining unit, and configured to control the opening of the gas filling valve by operating the solenoid valve when the LPI is charged.

In the present invention, the LLP charge determination unit,

A first switch member configured to open and close an LLP injection hole; a second switch member which opens an LLP injection hose inserted into the bombe and the LLP injection hole; And a comparator connected to the "L" terminal of the alternator by a wire and determining whether the engine is turned off by measuring the voltage of the "L" terminal.

In the present invention, the first switch member,

It is installed in the LPI injection port of the LPI vehicle, it characterized in that it comprises a first sensor for detecting the opening or closing of the first switch member to transmit the opening and closing signal to the control unit.

In the present invention, the second switch,

It is characterized in that it is installed in the driver's seat crash pad unit of the LPI vehicle.

In the present invention, the "L" terminal of the alternator,

Connected to the charge warning light, the engine start is characterized in that the terminal for checking the charge by turning off the warning light.

In the present invention, the "L" terminal of the alternator,

Characterized in that the voltage generated during engine shutdown is " 10 volts " or less.

Hereinafter, a fuel device equipped with an LP gas leakage preventing device according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3 is a schematic view showing a fuel device in which an LP gas leakage preventing device is installed according to a preferred embodiment of the present invention.

As illustrated in FIG. 3, the fuel device 100 provided with the LPG gas leakage preventing device according to the present invention includes a cylinder 10 and a supply pipe 23 between the cylinder 10 and an engine (not shown). Is connected, a filter 30, a vaporizer 40, and the like are installed on the supply pipe 23, and a gas filling pipe 25 for filling is connected to the cylinder 10, and the gas filling pipe 25 is connected. At the end of the charging port 22 is connected to the external charger (not shown) is mounted, the gas filling valve 20 is mounted on the cylinder 10, the control unit 50 for controlling the gas filling valve 20 and The LLP charge determining unit 60 is installed.

The bombe (Bombe) (10) refers to the place where the LPG is stored at high pressure. The LPG is a by-product of crude oil refining, which is composed of propane and butane as a main component, and a mixture of propylene and butylene is contained therein. If lowered, it has a gasification characteristic. The cylinder 10 is provided with a gas filling valve 20 and a gas supply valve 21. The gas supply valve 21 is connected to the gas supply pipe 23, and a filter 30 and a vaporizer 40 are installed on the gas supply pipe 23.

The filter 30 is a device for filtering the impurities in the LLP discharged from the cylinder 10. The filter 30 is connected to the vaporizer 30.

The vaporizer 40 is a device for converting the liquid liquefied gas into gas liquefied gas, which corresponds to a vaporizer of a gasoline engine. Therefore, the vaporizer 40 serves as an evaporator for converting the liquid LLP into the gas LPI by reducing the pressure, and using only the gas LLP included in the bomb 10 can improve the startability in severe times, but at high speed. Due to the lack of the amount of LLP required by the engine, the liquid fuel can be forcibly vaporized to supply the amount of fuel required for the operation of the engine.

The cylinder 10 is provided with a gas filling valve 20, through which the LPG flows into the cylinder 10 through the gas filling valve 20. 4 is a view showing a gas filling valve according to a preferred embodiment of the present invention. As shown in FIG. 4, the gas filling valve 20 is provided with a solenoid valve 27 at a position of the handle part 6 of the conventional gas filling valve 5 shown in FIG. 2. The solenoid valve 27 is operated by the control unit 50 to selectively control the gas inlet path 29 of the gas filling valve 20.

The controller 50 controls the solenoid valve 27, and is connected to the LLP charge determining unit 60.

The LLP charging determination unit 60 may include a first switch member 61 installed at an LPI injection hole (not shown) of an LPI vehicle, and a second switch 63 installed at a driver's seat crash pad unit (not shown) of the LPI vehicle. And a comparator 67 connected to the "L terminal" 65 of the alternator by a wire and measuring the voltage of the "L terminal" 65 to determine whether the engine is stopped.

The first switch member 61 is connected to the control unit 50, and when the door of the LLP inlet opening is opened to insert the charger to charge the LLP, the opening signal of the LLP inlet door transmits to the control unit 50. The second switch member 63 is operated when the LLP charger is inserted into the LLP injection port, so that the LLP gas is charged into the cylinder 10. Alternators generally have "L", "B", and "S" terminals. The " B " terminal (not shown) is a terminal that charges a generated current to a battery (not shown). The "S" terminal (not shown) is a terminal for supplying power to a corresponding switch when operating various switches such as a headlight. The " L " terminal 65 is turned off by an alternator which is connected to a charge warning light (not shown) and generates power when the engine is started. The " L " terminal 65 has a voltage range of approximately 10 volts when the engine is started. To 13.5 volts. Therefore, when the comparator 67 is provided between the "L" terminal 65 and the control part 50, and the voltage of the "L" terminal 65 is measured below 10 volts, the comparator 67 will stop an engine. The status signal is transmitted to the controller 50.

As described above, the LLP charge determining unit 60 determines whether the start-up is stopped in the comparator 67 connected to the "L" terminal 65 of the alternator, and the LLP by the first switch member 61. It is determined whether the injection phrase is opened, the second switch member 63 determines whether the LPG gas is to be charged into the cylinder 10, and transmits the determined signal to the controller 50.

Then, the control unit 50 receives signals from the first switch member 61, the second switch member 63, and the comparator 67 to stop the start and the door of the LLP inlet opening and the LLP gas. If all three cases to be filled with the cylinder 10, the solenoid valve 27 is opened so that the LPG gas flows into the cylinder 10.

The operation of the fuel device 100 provided with the LPG gas leakage preventing device according to the present invention having the above configuration will be described.

In the fuel device 100 equipped with the LP gas leakage preventing device according to the present invention, the comparator 67 connected to the "L" terminal 65 of the alternator has a voltage measured at the "L" terminal 65 of the alternator ". It determines whether or not more than 10 volts ", and determines whether the engine is started, and transmits a determination signal to the controller 50. If the voltage of the "L" terminal 65 is "10 volts" or less, the engine is in a stopped state.

In addition, the first switch member 61 determines whether the door of the LPI injection port is opened, and transmits the determined signal to the controller 50.

Next, the second switch member 63 determines whether the LPG gas is to be charged into the cylinder 10, and transmits a determination signal to the controller 50.

Then, the controller 50 analyzes the sheared discrimination signal, when the engine is stopped, when the door of the LLP inlet is opened, and when the signal is transmitted so that the LPG gas is charged into the cylinder 10. Only when all have been applied, the solenoid valve 27 of the gas filling valve 20 connected to the control unit 50 is operated, so that the Elbegi gas is charged into the cylinder 10.

Therefore, the LPG vehicle has a structure in which the driver and the gas source can refuel without directly operating the gas filling valve by the fuel device 100 in which the LP gas leakage preventing device is installed.

The present invention has been described above with reference to the embodiments shown in the drawings. However, the present invention is not limited thereto, and various modifications or other embodiments falling within the scope equivalent to the present invention are possible by those skilled in the art. Therefore, the true scope of protection of the present invention should be defined by the following claims.

The fuel device equipped with the LP gas leakage preventing device according to the present invention as described above has the following effects.

When lubricating LPI, the driver and gas source operate the solenoid valve instead of directly operating the gas filling valve, so that the starting is stopped when the LPI is filled, the door of the LPI inlet opening is opened, and the second switch member installed in the driver's seat. By opening the gas filling valve only in the operating state, it is possible to prevent the leakage of the human blood due to the fire by blocking the leakage of the L-Phigi injection hose that can occur during vehicle crash.

Claims (6)

Bomb and Elpgi is stored on the filter, the filter is installed on the supply pipe connected between the cylinder and the engine to filter the Elpgi, vaporizer and vaporizer function to control the vaporization and pressure of the Elpgi supplied from the cylinder to the engine, and the bomb In the fuel device for an Elpji vehicle consisting of a filling pipe for connecting between the gas filling valve and the Elpgi charger installed in, A solenoid valve installed in the gas filling valve to selectively control the inflow of the LLP flowing into the cylinder; And And a control unit connected to the solenoid valve and the LPI filling determination unit, the controller controlling the opening of the gas filling valve by operating the solenoid valve when the LPI is charged. The method of claim 1, wherein the LLP charging determination unit, A first switch member for opening and closing an LPI inlet; A second switch member for opening an LP injection hose inserted into the bomb and the LP injection hole; And And a comparator connected to the "L" terminal of the alternator by a wire and measuring a voltage of the "L" terminal to determine whether the engine is turned off. 11. The method of claim 2, wherein the first switch member, The fuel device is installed in the LPG inlet of the LPG vehicle, the LPG gas leakage prevention device, characterized in that it comprises a first sensor for detecting the opening or closing of the first switch member to transmit the opening and closing signal to the control unit. The method of claim 2, wherein the second switch, A fuel device installed with an LPG gas leakage preventing device, characterized in that installed in the driver's seat crash pad unit of the LPG vehicle. The terminal of claim 2, wherein the "L" terminal of the alternator is A fuel device equipped with an LPG gas leakage preventing device, characterized in that the terminal is connected to the charge warning light and the engine is turned off to check the charge by turning off the warning light. The terminal of claim 2, wherein the "L" terminal of the alternator is A fuel device equipped with an LP gas leak prevention device, characterized in that the voltage generated when the engine is stopped is "10 volts" or less.