Fuel gas injection method for dual-fuel vehicle

Abstract

The invention discloses a fuel gas injection method for a dual-fuel vehicle. The fuel gas injection method comprises a gas intake pipe and a hollow pipe. A plurality of injection holes are formed in the upper end of the hollow pipe, and the injection holes are correspondingly provided with electromagnetic valves. A groove is formed in the inner wall of the hollow pipe. The injection holes directly face the groove. A plurality of electrical heated tubes are arranged in the groove side by side. Guide blocks are installed at the bottoms of the electrical heated tubes. Guide grooves matched with the guide blocks are formed in the bottom of the groove. Each electrical heated tube comprises a tube body, an insulating material filled inside the tube body, and a heating wire arranged inside the tube body. The tail end of each heating wire is connected with a binding post. A small hole communicating with the outside is formed in the end, far away from the gas intake pipe, of the groove. Each binding post penetrates through the small hole to be connected with a wiring board. The open end of the groove is covered with a heat conducting plate. The guide blocks are installed on the lower portions of the tube bodies of the electrical heated tubes, the guide blocks are matched with the guide grooves, and thus the tube bodies can be placed more stably. The electrical heated tubes can be fastened without adding new fixing structures, and accordingly the purpose of optimizing the inner structure of an injection rail is achieved.

Description

technical field [0001] The invention relates to a gas injection rail, in particular to a gas injection method for a dual-fuel 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 injection method for dual-fuel vehicles, which ensures the normal passage of gas and avoids 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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