KR0133960Y1 - Fuel supply unit of an lpg automobile - Google Patents

Abstract

The present invention relates to a fuel supply device for an LPG vehicle, and includes a front solenoid valve (3) and a front solenoid valve (3) which operate front opening and closing between a fuel supply pipe (2) drawn out from a gas cylinder (1). The rear lyole solenoid valve 4 controls the opening and closing of the fuel supply pipe 2, and the air inside the air duct 14 introduced into the supply pipe 10 of the engine E through the air cleaner 13. In the fuel supply device of the LPG vehicle for supplying a mixture of the above and the gas to the engine (E); Between the front solenoid valve 3 and the rear solenoid valve (4) for controlling the opening and closing of the fuel supply pipe (2) The bypass fluid for connecting the fluid to the front and the front fluid solenoid valve (3) of the compression fluid pump (20) and the pressure regulator (25) for maintaining the fuel pressure with the compression fluid pump (20) 21, the gas before the supply pipe (10) of the engine (E) Throttle valve 23 for controlling the amount of air in the air duct 14 introduced through the air cleaner 13 of the air supply pipe 10 by being maintained in the liquid phase to the injector 22 of the suction port P of the room Characterized in that it is mixed with the air introduced through the air and provided to the engine (E) to perform an explosive stroke; the fuel supply device of the LPG vehicle in this paper provides a venturi resistance by directly supplying the liquid LPG fuel to the engine. It aims to improve performance by removing and increasing the thermal efficiency per unit fuel volume.

Description

LPG Automobile Fuel Supply System

1 is a block diagram showing a fuel supply system of a fuel supply device of a conventional LPG vehicle.

2 is a block diagram showing the fuel supply system of the fuel supply device of the LPG vehicle in the present article.

* Explanation of symbols for main parts of the drawings

1: gas cylinder 2: fuel supply pipe

3: front solenoid valve 4: front solenoid valve

10: air supply pipe 13: air cleaner

14: air duct 20: compressed fluid pump

21: bypass euro 22: injector

23: throttle valve

The present invention relates to a fuel supply device for an LPG automobile, and more particularly, to an improved device for supplying fuel to an automobile engine using LPG as a main fuel.

LPG fuel supply system used in commercial vehicles is considered to be a good fuel due to its excellent economy and low amount of pollutants in emitted gas, but it is inferior to other internal combustion engines using gasoline and diesel in terms of engine performance. .

The reason for the performance deterioration in the LPG-fueled engine is that the LPG stored in the gas cylinder as a liquid state is evaporated and mixed with the inhaled air before being supplied to the engine to explode and the intake resistance is high. It is because the thermal efficiency by unit volume amount is low.

An object of the present invention is to provide a fuel supply apparatus for an LPG vehicle having a configuration capable of improving performance by improving the configuration of the fuel supply apparatus of the conventional LPG vehicle.

In order to achieve the above object, the fuel supply apparatus of the LPG vehicle of the present disclosure includes a front solenoid valve for operating the front opening and closing between fuel supply pipes drawn from a gas cylinder, and a fuel grade as a rear solenoid valve behind the front solenoid valve. A fuel supply apparatus of an LPG vehicle, which controls opening and closing of an engine and supplies a mixture of air in the air duct introduced into the engine supply pipe through an air cleaner to the engine; A compression fluid pump and a compression fluid pump and a bypass passage for fluidly connecting the front solenoid valve at the inlet end of the fuel supply pipe between the front solenoid valve and the rear solenoid valve for adjusting the front, the liquid gas is Is injected directly from the injector of the suction port in front of the It is characterized in that the explosion stroke is performed by mixing with the air introduced through the throttle valve for controlling the amount of air in the air duct drawn through the air cleaner to the engine.

The fuel supply apparatus of the LPG vehicle of the present invention together with the accompanying drawings will be described in more detail in comparison with the conventional configuration.

FIG. 1 is a block diagram showing a fuel supply system of a conventional LPG vehicle fuel supply device, and FIG. 2 is a block diagram showing a fuel supply system of a LPG vehicle fuel supply device of the present disclosure.

FIG. 1 is a schematic diagram showing a fuel supply apparatus for a conventional LPG vehicle in a conventional configuration; a fuel supply pipe 2 withdrawn from a gas cylinder 1 having a pressure regulator PC and a fuel inlet IF. In the rear, the front solenoid valve 3, which operates the front opening and closing, and the rear solenoid valve 4 behind the front solenoid valve 3, controls the opening and closing of the fuel supply pipe 2, and mounts the carburetor 5. While the vaporized gas is discharged into the venturi hole 12 of the mixer section 11 behind the air supply pipe 10 of the engine E and mixed with air in the air duct 14 introduced through the air cleaner 13. And controlled by the throttle valve 15 is supplied to the engine E and the burned gas is discharged to the exhaust pipe 16.

In the above configuration, the gas vaporized while passing through the vaporizer 5 is sucked by the negative pressure of the venturi hole 12, and is a state of already vaporized gas (Gas). There is a problem in the above-described problem because there is a limit in improving the performance of the engine.

In view of the above problems of the conventional configuration, the fuel supply apparatus of the LPG vehicle of the present invention, which is devised, will be described with FIG.

A fuel solenoid valve 2 withdrawn from the gas cylinder 1 is configured as a fluid passage, and the front solenoid valve 3 and the rear of the front solenoid valve 3 for controlling the opening and closing of the fuel supply engine 2 are arranged. A solenoid valve 4 is provided.

In addition, further comprising a compression fluid pump 20 for increasing the fuel pressure so that steam does not occur in the liquefied gas between the front solenoid valve (3) and the rear solenoid valve (3), the compressed fluid pump (20) A pressure regulator 25 and a bypass passage 21 are configured to return the discharged excess fuel and maintain the pressure constant.

Compression fluid pump 20 is a variety of types of compression fuel pump to maintain the liquefied gas in a liquid state, the maintenance of this liquid state is controlled by the following central control unit.

The gas in the liquid state via the rear solenoid valve 4 removes the vaporizer 5 and is directly injected from the injector 22 of the suction port P in front of the air supply pipe 10 of the engine E. And a throttle valve 23 for controlling the amount of air inside the air duct 14 drawn through the air cleaner 13 of the air supply pipe 10.

The injector 22 injects the gas in a liquefied state and ignites the spark plug 24.

The front solenoid valve 3, the pressurized fluid pump 20, the injector 22, and the spark plug 24 are connected to the central vehicle control unit (ECU) of a typical vehicle that issues control signals for driving in accordance with the engine condition. It is opened and closed by the operation signal.

The operation of the fuel supply device of the LPG vehicle in the present configuration of the above configuration will be described in detail.

When the ignition switch is turned on, the central control unit (ECU) operates the front solenoid valve (3), the rear solenoid valve (4) and the compressed fluid pump (20) to generate the pressure of fuel from the cylinder (1) to the injector (22). Condition for the engine operation.

At this time, if the ignition switch is set to the starting position, the liquid fuel is injected from the injector 22 and the ignition plug 24 is operated to start.

If the ignition switch is still in the 0N position when the engine is not started, the front solenoid valve (3), the rear solenoid valve (4), and the compressed fluid pump (20) should be Run and stop.

In addition, in order to maintain a constant fuel pressure between the compressed fluid pump 20 and the injector 22, a pressure regulator 25 and a bypass pipe are installed to return excess fuel.

The injected liquid gas is mixed with the air in the air duct 14 introduced through the air cleaner 13 of the air supply pipe 10 to vaporize instantly in the engine E and perform an explosion stroke.

In this way, the fuel injected into the engine E is supplied in the liquid phase, thereby minimizing the intake resistance due to the venturi configuration and increasing the volume heat efficiency, thereby greatly improving the performance of the engine.

The fuel supply device of the LPG vehicle of the present paper as described above is a useful design to improve performance by eliminating venturi resistance and increasing thermal efficiency per unit fuel volume by directly supplying liquid LPG fuel to the engine.

Claims (1)

Between the fuel supply pipe 2 drawn out from the gas cylinder 1, a front solenoid valve 3 for opening and closing the front and a rear solenoid valve 4 behind the front solenoid valve 3 as a fuel supply pipe ( 2) the opening and closing of the engine is supplied, and the mixture of the gas inside the air duct 14 introduced into the air supply pipe 10 of the engine E through the air cleaner 13 and the above gas is supplied to the engine E. In the fuel supply device of the LPG vehicle; Compressed fluid pump 20 and the compressed fluid pump between the front solenoid valve 3 and the rear solenoid valve 4 for controlling the opening and closing of the fuel supply pipe (2) (20) and the bypass passage 21 for fluidly connecting the fuel pressure regulator 25 and the entry end (2 '), the front solenoid valve (3) and the compression fluid pump 20 and the throttle valve ( 23), the spark plug 24 is the central control to drive control in conjunction with the engine state Value of the LPG fuel supply car characterized in that the optimum control by (E.C.U.).