KR19980064422U - Residual gas collection device for vehicle engine for natural gas - Google Patents

Abstract

The present invention relates to a device for collecting residual gas of a vehicle engine for natural gas, wherein unburned fuel gas is discharged from the inlet manifold 7 to the discharge pipe 7b of the intake manifold 7 and the fuel pipe 8 of the fuel injection unit 8. 8b), so that the residual gas of the natural gas engine, which always had a fire occurrence factor due to external impact, is collected by the collecting device 6 equipped with the storage unit 4, thereby improving safety. will be.

Description

Residual gas collection device for vehicle engine for natural gas

The present invention relates to a residual gas collection device of a vehicle engine for natural gas, and in particular, to collect and store the natural gas remaining in the fuel pipe and the intake manifold of the engine stopped starting, and to be ejected again upon restarting gas leakage The present invention relates to a residual gas collection device of a vehicle engine for natural gas, which is intended to eliminate the risk of fire due to the fire.

In general, an engine of a vehicle in which natural gas (CNG) is used as a fuel is configured to reduce exhaust gas because gas is injected from a port into a port. As shown in FIG. A plurality of discharge pipes 10b are formed and have an intake manifold 10 having a substantially semi-circular cylindrical shape, a fuel supply pipe 20a to which fuel is supplied, a fuel pipe 20c to which fuel is distributed, the fuel pipe 20c and the And a fuel injection section 20 composed of a book valve 20b placed on the path of the fuel supply pipe 20a and an injection 20d for injecting the fuel.

In this case, the injection 20d of the fuel injection unit 20 is connected to the discharge pipe 10b of the intake manifold 10 and injects natural gas into the discharge pipe 10b.

Therefore, the fuel injected into the discharge pipe 10b of the intake manifold 10 via the fuel pipe 20c and the injection 20d is mixed with the air flowing into the intake manifold 10 and proceeds to the cylinder. Lose.

However, when the engine of the vehicle using the natural gas as the fuel, the external shock applied to the engine part because the natural gas introduced into the intake manifold and the fuel pipe stops flowing and remains when the engine stops driving. And there was a problem that a fire may occur by the spark.

The present invention is devised to solve the above problems, and when the engine is turned off during operation of the engine, the natural gas remaining in the fuel pipe and the intake manifold is collected and re-extracted when the engine is driven. It is an object of the present invention to provide a residual gas collection device for a natural gas vehicle engine to eliminate a risk factor.

1 is a partial perspective view showing an intake manifold of an engine having a residual gas collecting device according to the present invention;

2 is a partial perspective view corresponding to FIG. 1 in a conventional structure.

* Description of the symbols for the main parts of the drawings *

1: Exhaust Pipe 1a: Book Valve

2: intake pipe 2a: book valve

3: pipeline 4: storage

5: control unit 6: collecting device

7: intake manifold 7a: body part

7b: fuel inlet 7c: connector

8: Injection pipe 8a: Book valve

8b: fuel pipe

In order to achieve the above object, the present invention provides a connecting tube for communicating a plurality of discharge pipes formed into the intake manifold horizontally inside the body; The connecting device connects the pipe and the fuel pipe, and includes a conduit comprising an exhaust pipe and an intake pipe having a book valve therein, a storage unit storing gas fuel, and a control unit controlling the book valve of the pipe section. do.

Therefore, the fuel remaining inside the fuel pipe and the intake manifold when the engine is turned off is stored in the storage via the intake pipe, and is discharged into the fuel pipe via the exhaust pipe when the engine is driven.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a partial perspective view showing an intake manifold of an engine in which a residual gas collection device according to the present invention is installed, and a plurality of pipes formed at regular intervals along a horizontal direction into an interior of a body portion 7a which is a substantially semi-circular cylinder. An intake manifold 7 composed of a 7b and a connecting pipe 7c for horizontally communicating the discharge pipe 7b; It is provided inside the pipeline to control the outflow of the fuel valve (8a), and is placed perpendicular to the upper portion of the intake manifold (7) and distributes the fuel to each discharge pipe (7b) of the intake manifold (7) A fuel injection unit 8 made of a connecting pipe 8b; An exhaust pipe 1 having a book valve 1a provided therein and a connection pipe 7c of the intake manifold 7 connected to the fuel pipe 8b of the injection portion 8 and connected to the inside A conduit section 3 composed of an intake pipe 2 provided with a valve 2a, a conduit section 3 formed at the rear of the conduit section, and formed at the rear of the conduit section; It consists of a storage unit (4) for storing the residual gas introduced through the intake pipe (2), and a control unit (5) for controlling the book valves (1a, 2a) located inside the conduit (3) It consists of a collecting device (6).

Therefore, when the engine is turned off, the control valve 5 controls the surge valve 2a provided inside the intake pipe 2 so that the fuel remaining in the fuel pipe 8b and the discharge pipe 7b is sucked in. It flows into the storage part 4 via the engine 2, and when the engine is driven, the book ball 1a provided inside the exhaust pipe 1 is controlled by the control part 5, and the said storage part 4 is controlled. Is stored in the fuel pipe 8b.

Accordingly, since residual gas remaining in the intake manifold 7 and the fuel pipe 8b is stored in the storage unit 4, the topical factors of the engine caused by external shock and sparks are prevented.

As described above, according to the present invention, since the use of natural gas has an effect of reducing the exhaust gas, since unburned fuel gas remains in the exhaust pipe of the intake manifold and the fuel pipe of the fuel inlet when the engine is stopped, Since the residual gas of the natural gas engine, which always had a fire occurrence factor due to impact, is collected by a collecting device equipped with a storage unit, the safety of the gas is improved.

Claims (1)

Intake manifold consisting of a plurality of pipes formed at regular intervals along the horizontal direction into the body portion 7a, which is a semi-circular cylinder, and a connecting pipe 7c for horizontally communicating the discharge pipes 7b. (7); It is provided inside the pipeline to control the outflow of the fuel valve (8a), and is placed perpendicular to the upper portion of the intake manifold (7) and distributes the fuel to each discharge pipe (7b) of the intake manifold (7) A fuel injection unit 8 made of a connecting pipe 8b; It is connected to the exhaust pipe 1 through which the valve valve 1a is formed and the connection pipe 7c of the intake manifold 7 is connected to the fuel pipe 8b of the injection portion 8 and is connected to the inside of the inlet manifold 7. A conduit section 3 composed of an intake pipe 2 provided with a valve 2a, a conduit section 3 formed at the rear of the conduit section, and formed at the rear of the conduit section; It consists of a storage unit (4) for storing the residual gas introduced through the intake pipe (2), and a control unit (5) for controlling the book valves (1a, 2a) located inside the conduit (3) Residual gas collection device of a vehicle engine for natural gas consisting of a collecting device (6).