Anti-freezing CNG air feeder

Abstract

The invention discloses an anti-freezing CNG air feeder. The anti-freezing CNG air feeder comprises an air inlet pipe and a hollow pipe. A plurality of injection holes are formed in the upper end of the hollow pipe. An electromagnetic valve is correspondingly installed at each injection hole. A groove is formed in the inner wall of the hollow pipe. The injection holes right face the groove. A plurality of electric heat pipes are arranged inside the groove side by side. Guide blocks are installed at the bottom of each electric heat pipe. A guide groove matched with each guide block is formed in the bottom of the groove. Each electric heat pipe comprises a pipe body, an insulating material and an electric heat wire, wherein each insulating material is filled in the corresponding pipe body, and each electric heat wire is arranged in the corresponding pipe body. Wiring posts are connected to the tail end of each electric heat wire. A small hole communicating with the outside is formed in the end, away from the air inlet pipe, of the groove. The wiring posts penetrate through the small hole and are connected with a wiring plug board. The open end of the groove is covered with a heat-conducting plate. The guide blocks are installed on the lower portion of the pipe body of each electric heat pipe, each guide block is matched with the corresponding guide groove, placing of the pipe bodies is made to be more stable, and the electric heat pipes can be fastened without adding new fixing structures, so that the purpose of optimizing the internal structure of an injection rail is achieved.

Description

technical field [0001] The invention relates to a fuel injection rail, in particular to a CNG gas supply device capable of preventing freezing. Background technique [0002] The gas injection rail is a necessary equipment on CNG-gasoline dual-fuel vehicles, but when the temperature is low, the low temperature causes the gas in the low-pressure pipeline to shrink, forming a negative pressure between the gas common rail and the filter, so that the gas injection rail opens It is not easy and affects the normal use of the gas system; we use water heating to heat the gas injection rail to make it work normally, but it is necessary to install a waterway, which increases pipeline interference, is prone to liquid leakage, and increases the difficulty of maintenance. Contents of the invention [0003] The object of the present invention is to provide an antifreeze CNG gas supply device, which can ensure the normal passage of gas and avoid liquid in the gas pipeline. [0004] The o...

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Problems solved by technology

[0002] The gas injection rail is a necessary equipment on CNG-gasoline dual-fuel vehicles, but when the temperature is low, the low temperature causes the gas in the low-pressure pipeline to shrink, forming a negative pressure between the gas common rail and the filter, so that the gas injection rail opens It is not easy and affects the normal use of the gas system; we use water heating to heat the gas injection rail to make it work normally, but it is necessary to install a waterway, which increases pipeline interference, is prone to liquid leakage, and increases the difficulty of maintenance

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