Automotive fuel gas supply device

Abstract

The invention discloses an automotive fuel gas supply device which comprises a gas inlet pipe and a hollow pipe. A plurality of spray holes are formed in the upper end of the hollow pipe. Electromagnetic valves are correspondingly mounted on the spray holes. A groove is formed in the inner wall of the hollow pipe, and the spray holes exactly face the groove. A plurality of electric heating pipes are arranged in the groove side by side. A guide block is mounted at the bottom of each electric heating pipe. Guide grooves matched with the guide blocks are formed in the bottom of the groove. Each electric heating pipe comprises a pipe body, an insulation material with which the pipe body is filled and an electric heating wire arranged in the pipe body. The tail ends of the electric heating wires are connected with binding posts. Small holes communicating with the outside are formed in the end, far away from the gas inlet pipe, of the groove. The binding posts penetrate the small holes to be connected with a wiring plug board. The open end of the groove is covered with a heat conduction plate. The guide blocks are mounted on the lower portions of the pipe bodies of the electric heating pipes and matched with the guide grooves, and therefore the pipe bodies can be mounted more stably, in other words, the electric heating pipes can be fastened without additionally arranging a new fixing structure, and the aim of optimizing an internal structure of a spray rail is achieved.

Description

technical field [0001] The invention relates to a fuel injection rail, in particular to a fuel gas supply device for a vehicle. 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 purpose of the present invention is to provide a gas supply device for vehicles, which ensures the normal passage of gas and avoids liquid in the gas pipeline. [0004] The object of the present...

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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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