LNG (Liquefied Natural Gas) vehicle-mounted gas cylinder supercharging system

Abstract

The invention discloses an LNG (Liquefied Natural Gas) vehicle-mounted gas cylinder supercharging system. The LNG vehicle-mounted gas cylinder supercharging system comprises a gas cylinder, a vaporizer, a buffer tank and a controller. The LNG vehicle-mounted gas cylinder supercharging system is characterized in that one end of the vaporizer is connected to the gas cylinder via a pipeline; the mounting height of the vaporizer is lower than the lowest liquid level of the gas cylinder; the other end of the vaporizer is connected to the buffer tank; one output of the buffer tank is connected to an engine and the other output of the buffer tank is connected to the gas cylinder via a circulating pump; a temperature sensor, an electric heater and a pressure sensor are arranged in the buffer tank and are connected with the controller via a circuit; meanwhile the controller is connected with the circulating pump to control the working state of the circulating pump. The LNG vehicle-mounted gas cylinder supercharging system disclosed by the invention is not affected by any use condition and environment temperature, the pressure is stably controlled, the stable working of the engine is guaranteed, meanwhile the fuel waste is reduced, the environmental protection is improved and the use safety is enhanced.

Description

technical field [0001] The invention relates to the technical field of LNG vehicle-mounted gas cylinder pressurization, in particular to a LNG vehicle-mounted gas cylinder pressurization system. Background technique [0002] A liquefied natural gas (LNG) cylinder for automobiles is a cryogenic insulated pressure vessel designed with a double-layer (vacuum) structure. The inner tank is used to store low-temperature liquid liquefied natural gas, and its outer wall is wrapped with multiple layers of heat-insulating material, which has super-strong heat-insulating properties. insulation system. Materials with excellent adsorption properties are placed in the interlayer to ensure the lasting vacuum of the interlayer, and the design of the shell and support system can withstand the relevant external forces generated by the vehicle when it is driving. The liquid discharge of the LNG vehicle-mounted gas cylinder is driven by the self-pressure of the gas cylinder. After the liquid ...

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Problems solved by technology

[0004] The technical problem to be solved and the technical task proposed by the present invention are to improve the existing technology and provide a LNG vehicle-mounted gas cylinder pressurization system to solve the problem that the traditional LNG vehicle-mounted gas cylinder pressurization system in the current technology is greatly affected by the ambient temperature. , it is difficult to ensure the stability of the cylinder pressure, and it is easy to cause the pressure to rise continuously to waste fuel and pollute the environment

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