Self-pressurization device for vehicle gas cylinder

Abstract

The invention relates to a self-pressurization device for a vehicle gas cylinder. The self-pressurization device for the vehicle gas cylinder comprises the gas cylinder, a pressure sensor, a liquid taking pipeline, an electrically operated valve assembly, a vaporizer, a gas pipeline, a gas pump, an electrical signal system and a control system. According to the self-pressurization device for the vehicle gas cylinder, the control system monitors the running conditions of an engine and a vehicle to control the actions of the gas pump and the electrically operated valve, and thus the self-pressurization process is controlled. The self-pressurization device for he vehicle gas cylinder has the advantages that the pressure in the gas cylinder is guaranteed to be stable under different running conditions of the vehicle, the gas cylinder is started normally at any working conditions, the self-pressurization system is guaranteed to be started normally at any conditions, and the cold loss of LNG is reduced to a great extent. The self-pressurization device for the vehicle gas cylinder can be used for pressurizing the gas cylinders of gas-fueled vehicles.

Description

technical field [0001] The invention belongs to the field of laser processing, and in particular relates to the preparation technology of metal porous membranes. Background technique [0002] The usual LNG vehicle gas cylinders do not have a self-pressurization system, so the storage tanks in the LNG filling station must have a higher pressure (generally not less than 0.8MPa) to ensure the normal operation of the vehicle gas supply system. In this case, because the pressure of the LNG storage tank is always at a high level, the pressure of the storage tank will rise in a short period of time, causing the safety valve to take off, thereby generating LNG discharge. It is neither safe, but also affects the economy due to the waste of emissions. [0003] In order to solve the above problems, the patent "Self-pressurizing Device for Vehicle Gas Cylinders" with application number 201010018128.2 proposes a self-pressurizing device for vehicle gas cylinders. This device utilizes t...

AI Technical Summary

Problems solved by technology

This device utilizes the potential energy of LNG to guide LNG into the carburetor. After the engine stops working, because the cooling effect of the liquid intake pipeline is much lower than that of the gas cylinder, the LNG in the liquid intake pipeline will be continuously vaporized, thereby greatly reducing the LNG temperature. Non-destructive storage time in the gas cylinder; in addition, the flow of LNG cannot be precisely controlled only through the switch of the valve, so the pressure in the gas cylinder will fluctuate greatly, which will affect the smooth operation of the engine

[0004]The patent application number 201010131499.1 "A self-pressurizing device for LNG horizontal welded insulated gas cylinder for vehicles and its use method" proposes a gas cylinder for vehicles The self-pressurizing device, which takes liquid from the self-pressurizing device and the engine through the same liquid intake port, so the engine cannot be pressurized when the engine is working; at the same time, when the pressure in the cylinder is lower than the pressure in the pipeline , the siphon effect proposed by the self-pressurizing device will not work normally, resulting in the inability to carry out the self-pressurizing process

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