Natural gas supply pressurization system

Abstract

The utility model relates to a natural gas supply pressurization system, and aims to provide a method for solving the problem of insufficient gas supply of a natural gas vehicle, so that the natural gas vehicle can normally operate in any environment, and the dynamic property and fuel economy of the whole vehicle are improved. Which comprises an LNG cylinder (1), a vaporizer (2), a buffer tank (3) and a pressure stabilizing valve (4), and is characterized in that a gas supply supercharger (6) and a supercharger controller 7 are connected between a gas outlet of the buffer tank (3) and a gas inlet of the LNG cylinder (1), and the supercharger controller 7 controls the gas supply supercharger (6) to be closed. On the basis of an original gas supply system of the gas vehicle, the pressurization system is additionally arranged, the problem that power is insufficient after gas is refilled and even in the using process in a cold region is solved, and meanwhile gas economy is improved.

Description

Technical Field

[0001] The utility model relates to a pressure boosting system, in particular to a natural gas supply pressure boosting system. Background Art

[0002] At present, in the heavy truck industry, heavy vehicles using LNG as fuel account for a large proportion, among which the gas supply system of LNG vehicles is Figure 1 Natural gas is stored in the LNG cylinder 11 in both gaseous and liquid phases. When the engine requires natural gas for combustion, the liquefied natural gas in the LNG cylinder 11 is heated by the vaporizer 21, heating the liquid phase natural gas to become gaseous phase natural gas. The liquefied natural gas is heated by the vaporizer 21 and then passes through the buffer tank 31 to store the liquefied gas and buffer the pressure fluctuations of the vaporized gas. The vaporized natural gas passes through the buffer tank 31 and then passes through the pressure regulating solenoid valve 41. Under the control of the pressure regulating solenoid valve 41, it is provided to the engine within the required pressure range and finally enters the engine 51 for combustion.

[0003] The natural gas in the gas station is a low-temperature liquid, with the lowest temperature reaching -160 degrees. After being added to the gas cylinder, part of the gas phase natural gas will be liquefied, resulting in too low pressure in the gas cylinder. The gas engine requires a certain gas supply pressure to ensure its normal operation. After refilling the gas, the gas vehicle will experience low gas supply pressure, insufficient power or even engine stalling, resulting in high gas consumption. Utility Model Content

[0004] The purpose of the utility model is to provide a method for solving the problem of insufficient gas supply to natural gas vehicles, so that natural gas vehicles can operate normally in any environment and improve the power and fuel economy of the whole vehicle.

[0005] The utility model is realized by the following technical solutions:

[0006] A natural gas supply boosting system includes an LNG cylinder 1, a vaporizer 2, a buffer tank 3 and a pressure stabilizing valve 4. A gas supply booster 6 and a booster controller 7 are connected between the gas outlet of the buffer tank 3 and the gas inlet of the LNG cylinder 1. The booster controller 7 controls the gas supply booster 6 to be closed.

[0007] The utility model adds a pressurizing system on the basis of the original gas vehicle gas supply system, which solves the problem of insufficient power after refilling or even when used in cold areas, and improves the gas economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic diagram of the air supply system of a conventional vehicle of the utility model;

[0009] Figure 2 It is a schematic diagram of the present utility model. DETAILED DESCRIPTION

[0010] like Figure 2 As shown, this gas vehicle gas supply boosting system is designed for situations where the cylinder pressure cannot meet the engine's operating requirements. This utility model provides a solution to insufficient gas supply pressure in gas vehicles. The hydraulic pump drive system primarily comprises an LNG cylinder 1, a vaporizer 2, a buffer tank 3, a pressure regulating valve 4, a gas supply booster 6, and a booster controller 7.

[0011] When the gas supply pressure required by the engine 5 is insufficient, the booster controller 7 controls the gas supply booster 6 to open based on the collected pressure value of the LNG cylinder 1 and the pressure value of the gas supply inlet of the engine 5, so as to pressurize the gasified natural gas in the buffer tank 3 into the LNG cylinder 1; when the working pressure reaches the upper limit, the booster controller 7 controls the gas supply booster 6 to close, realizing automatic control and ensuring that the gas supply pressure meets the engine requirements.

[0012] The utility model adds a boosting system to the existing gas supply system of gas vehicles to ensure that the gas supply pressure is within the required range, and provides a method for ensuring the gas supply pressure of gas vehicles; the boosting system added to the gas system is accurately and in real time controlled, so through the boosting system controller, by collecting the engine end gas supply pressure and the gas cylinder pressure, etc., the opening and closing of the boosting system is accurately controlled, which not only solves the convenience of operation, but also solves the accuracy of gas supply pressure judgment.

Claims

1. A natural gas supply and pressure boosting system, comprising an LNG cylinder (1), a vaporizer (2), a buffer tank (3) and a pressure stabilizing valve (4), characterized in that: An air supply booster (6) and a booster controller (7) are connected between the air outlet of the buffer tank (3) and the air inlet of the LNG cylinder (1), and the booster controller (7) controls the air supply booster (6) to be closed.

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