| 摘要 |
PURPOSE: A fuel filter for a natural gas vehicle is provided to prevent the deterioration of binding power due to vibration by fixing a body and a top cover by the double screw-coupling. CONSTITUTION: A fuel filter for a natural gas vehicle includes a body(210), a drain valve(220), a filter pipe(230), a guide pipe(240), a top cover(250), a first O-ring(260), a second O-ring(270), and a lower cover(280). The body has a first male screw part(211) on the upper end external circumference surface. The drain valve is installed to be separated and coupled at the lower surface of body. The filter pipe is built in the body and separates a foreign substance included in the natural gas. The guide pipe is installed in the filter pipe so as to induce the natural gas to the central portion of the filter pipe. The top cover has a first female screw part, which is screw-coupled to the first male screw, at the lower inner side circumference surface, has a second male screw part(254) at the lower outer side circumference surface, and has a supplying hole and a discharging hole(253) at the upper portion thereof. The first O-ring is installed so as to maintain the air tightness between the upper surface of body and the lower surface of top cover. The second O-ring is installed so as to maintain the air tightness between the external circumference surface of the body and the internal circumference surface of the top cover. The lower cover includes a second female screw part(281), which is screw-coupled to the second male screw part, on the internal circumference surface thereof.
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