KR100345104B1 - Solenoid unit for lpg vehicles - Google Patents

Abstract

A solenoid unit for an LPG vehicle is disclosed. The disclosed Ellipse vehicle solenoid unit includes a first passage formed to pass liquid fuel therein, a second passage communicating with the first passage and formed to pass a gaseous fuel, and one side where the first and second passages meet. A block formed in the block and having a third flow path connected to the vaporizer; A liquid and gaseous filter unit installed at one side of the block in communication with the first, second, and third flow paths to filter foreign substances in the fuel; A liquid and gaseous solenoid portion installed in communication with the first, second and third flow paths on the other side of the block to block or pass the flow of the fuel; And a non-return valve installed on one side of the block on the first channel or the second channel to prevent the respective fuels of the first channel and the second channel from flowing back toward the opposite channel. It features. According to the present invention, there is an advantage that the fuel (LP gas) does not leak while the vehicle is running.

Description

Solenoid unit for LFI vehicle {SOLENOID UNIT FOR LPG VEHICLES}

The present invention relates to a liquified petroleum gas (LPG) solenoid unit for a vehicle, and more particularly, to a solenoid unit for an LPI vehicle in which a safety device is installed so that the LP gas does not leak.

LP Gas refers to liquefied petroleum gas. It is made by recovering and compressing natural gas emitted from an oil field or gas generated in the process of refining petroleum, and liquefied at a relatively low pressure at room temperature. It is easier to handle and has higher calories than gas. The fuel system of the LPG vehicle operated by using the LP gas is slightly different from the general gasoline vehicle, and a schematic diagram showing the configuration thereof is schematically illustrated in FIG. 1.

Referring to FIG. 1, an Elpgi vehicle has a high pressure bomb 11 for filling an Elp gas, a solenoid valve unit connected to the vessel 11, and a fuel passing through the solenoid valve unit when it is introduced. And a vaporizer 14 for depressurizing, vaporizing and regulating pressure.

The solenoid valve unit includes a first valve 20 for emergency shutoff directly connected to the container 11, and a second valve 30 connected between the first valve 20 and the vaporizer 14. . The first and second valves 20 and 30 may include blocks 21 and 31 having flow paths 22 and 32 formed therein, and flow paths 22 and 32 disposed above and below the blocks 21 and 31. It consists of the liquid and gaseous filter parts 23 and 33 provided in communication, and the solenoid parts 24 and 34 of liquid and gaseous phases. The first and second valves 20 and 30 are connected by the liquid and gaseous tubes 12, 25, 13, and 35, respectively. Meanwhile, in FIG. 1, arrows shown on the filter part and the solenoid parts 23 and 24 on the liquid phase indicate the direction of the fuel. Therefore, the valve on the liquid side is on and the valve on the gas phase is off.

Since the LPI vehicle having such a configuration has a problem of poor startability in cold weather, gaseous fuel is used when the coolant temperature of the engine is 15 ° C. or lower. When the coolant temperature of the engine is 15 ° C. or more, liquid fuel is used to improve driving performance.

However, when the gas phase tube 35 is damaged while the vehicle is in operation, there is a problem in that the LP gas (fuel) pressure on the liquid side flows back while operating the gas phase side valve so that the LP gas flows out through the damaged gas tube 35.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a solenoid unit for an LLP vehicle equipped with a safety device that does not leak the LP gas even if the tube is broken during operation of the vehicle.

1 is a view showing the configuration of an LPI vehicle solenoid unit according to the prior art.

Figure 2 is a view showing the configuration of the LLP vehicle solenoid unit according to the present invention.

3 is a view showing in detail the portion A of FIG.

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

41. Container 42. Vaporizer

43. First liquid tube 44. First gas tube

45. Second liquid tube 46. Second gas tube

50. 3rd valve 51. 1st block

52. First liquid phase filter part 53. First gas phase filter part

54. Solenoid part of the first liquid phase 55. Solenoid part of the first liquid phase

56. The first euro 57. The second euro

60. Fourth Valve 61. Third Euro

62. Euro 4 63. Euro 5

64. Second block 65. Second liquid phase filter unit

66. Filter part of the second gas phase 67. Solenoid part of the second liquid phase

68. Solenoid section on the second phase 70. Backflow check valve

71. Housing 72. Passage

73. Ball member

In order to achieve the above object, an LPI vehicle solenoid unit of the present invention includes a first flow path configured to pass a liquid fuel therein, and a second flow path communicated with the first flow path and configured to pass a gaseous fuel; A block having a third flow path formed at one side where the first flow paths and the second flow paths are connected to the vaporizer; A liquid and gaseous filter unit installed at one side of the block in communication with the first, second, and third flow paths to filter foreign substances in the fuel; A liquid and gaseous solenoid portion installed in communication with the first, second and third flow paths on the other side of the block to block or pass the flow of the fuel; And a non-return valve installed on one side of the block on the first channel or the second channel to prevent the respective fuels of the first channel and the second channel from flowing back toward the opposite channel. It features.

In the present invention, the non-return valve may include a housing formed in the block and having a passage communicating with the first, second and third flow paths; And a ball member installed on the passage to selectively block one of the first and second flow paths.

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

Figure 2 is a block diagram showing the configuration of the LLP vehicle solenoid unit according to the present invention.

Referring to the drawings, the LLP vehicle solenoid unit according to the present invention is installed between the high-pressure vessel 41 made of steel and the vaporizer 42 that functions to reduce pressure, vaporization, and pressure, and filters impurities in the fuel, It consists of a structure that cuts off and supplies fuel. This will be described in more detail as follows.

The LLP vehicle solenoid unit according to the present invention includes a third valve 50 installed on one side of the container 41 and a fourth valve installed in communication with the third valve 50 to receive fuel from the third valve 50. It consists of a valve 60.

The third valve 50 is a valve for emergency shutoff, and the first liquid tube 43 and the first gaseous tube 44 are provided so that the liquid fuel and the gaseous fuel can be supplied from the container 41, respectively. A first block 51 installed in communication with the container 41, a first liquid phase and a gaseous filter unit 52, 53 provided below the first block 51, and the first block 51; The first liquid phase and the gaseous solenoid portion 54, 55 which are installed above the first liquid phase and the gaseous state passing through and passing through the filter portions 52, 53 are configured to include. In addition, first and second flow paths 56 and 57 are formed in the first block 51 so that fuel in liquid and gaseous phase can pass therethrough.

The fourth valve 60 is provided with the second liquid phase and the gas phase tubes 45 and 46 installed in communication with the first and second flow paths 56 and 57, respectively, and the third flow path 61 formed to pass the liquid fuel. ), A fourth flow path 62 formed to pass the gaseous fuel, and a fifth flow path 63 formed on one side between the third and fourth flow paths 61 and 62 to communicate with the vaporizer 42. Is provided above the second block 64, the second liquid and gaseous filter portions 65 and 66 provided below the second block 64, and above the second block 64. Second liquid and gaseous solenoid parts 67 and 68 configured to pass and block fuel passing through the second liquid and gaseous filter parts 65 and 66, and the third, fourth and fifth euros 61 and 62. It is configured to include a non-return valve 70 is installed on one side of the second block 64 on the 63 to prevent the liquid fuel from flowing back from the third passage (61) toward the fourth passage (62).

As shown in detail in FIG. 3, the non-return valve 70 is installed at one side where the third, fourth and fifth flow paths 61, 62, and 63 cross each other, and the third Passages 72 communicating with the fourth and fifth passages 61, 62, and 63 are formed, and the housing 71 is installed in the second block, and the third passage 61 or the third passage is installed on the passage 72. It comprises a ball member 73 for selectively blocking the four flow paths (62).

Meanwhile, in order for the ball member 73 to properly block the inlet of the fourth flow path 62 on the gaseous side by the pressure on the liquid side, the gap between the ball member 73 and the passage 72 is It is desirable to keep it to a minimum.

Referring to the operation of the LFI vehicle solenoid unit having the configuration as described above are as follows. Here, description of the operation of the general LPI vehicle solenoid unit will be omitted, and only the operation according to the features of the present invention will be described.

Referring again to FIGS. 2 and 3, when the liquid fuel in the liquid and gaseous fuel is used, that is, when the valve side of the liquid phase is on and the valve on the gas phase is off, the container ( 41, the liquid fuel passes through the first liquid tube 43 to the first flow path 56 of the third valve 50, the first liquid filter 52, and the first liquid solenoid 54. After passing through, it flows into the fourth valve 60 through the second liquid tube 45. The liquid fuel flowing into the fourth valve 60 through the second liquid tube 45 is filtered while passing through the third passage 61 and the second liquid filter 65, respectively, and then the second liquid phase. After passing through the solenoid portion 67 of the third passage (61).

At this time, the ball member 73 is moved in the direction of the arrow by the pressure of the liquid fuel and is pushed to the side wall 72 of the passage 72 toward the fourth passage 62 to block the fourth passage 62 from the third passage 61. . Accordingly, the third passage 61 and the fifth passage 63 communicate with each other, and the liquid fuel flows into the vaporizer 42.

Similarly, when the gaseous fuel passes through the third and fourth valves 50 and 60, the ball member 73 is pushed to the sidewall of the passage 72 on the side of the third channel 61 by the gaseous fuel. Since the first and second passages 62 and 63 are in communication with each other, the gaseous fuel flows into the vaporizer 42.

Therefore, one of the fuel is blocked by the non-return valve 70 so that the liquid fuel does not flow back to the valve on the gas phase side or the fuel on the gas phase side. In particular, even when the second gaseous tube 46 is damaged, the liquid fuel does not operate the valve on the gas phase side, so the liquid fuel does not flow back to the gas phase side, so liquid fuel (LP gas) does not leak and thus the safety of the vehicle. Operation is possible.

As described above, the LLP vehicle solenoid unit according to the present invention has the following effects.

As the non-return valve is installed so that the fuel does not flow back, the reflux of the fuel is prevented so that the LP gas does not leak even if the tube is broken. Therefore, the smell of LP gas in the car according to the leakage of LP gas, fire is prevented, there is an effect that can contribute to pollution or safety.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments are possible. Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims (3)

A first flow path configured to pass liquid fuel therein, a second flow path communicated with the first flow path, and a gas flow fuel passing through the first flow path, and a first flow path formed at one side where the first flow path and the second flow path meet and connected to the vaporizer; A block provided with three euros; A liquid and gaseous filter unit installed at one side of the block in communication with the first, second, and third flow paths to filter foreign substances in the fuel; A liquid and gaseous solenoid portion installed in communication with the first, second and third flow paths on the other side of the block to block or pass the flow of the fuel; And a non-return valve installed on one side of the block on the first channel or the second channel to prevent the respective fuels of the first channel and the second channel from flowing back toward the opposite channel. ELP vehicle solenoid unit. The method of claim 1, The non-return valve is a solenoid unit for an LLP vehicle, characterized in that installed on one side of the first, second, third passages intersecting. According to claim 1, wherein the non-return valve, A housing having a passage communicating with the first, second, and third flow paths and installed in the block; And a ball member installed on the passage to selectively block one of the first and second flow paths.