| 摘要 |
PURPOSE: A device for dropping a fuel temperature is provided to efficiently drop the temperature through lowering pressure by adjusting an orifice and vertically transferring a piston by shrinking and expanding a diaphragm according to a detected temperature. CONSTITUTION: A cooling unit body(1) contains a fuel supply unit(2) and a fuel discharge unit(3). A temperature sensor(4) is attached on the discharge unit. A diaphragm(5) is installed at an upper portion of the cooling unit body for being shrunk and expanded according to the temperature detected in the sensor. Space units(6,7) are formed between the diaphragm and a piston(8), and at a lower portion of the cooling unit body. The piston is supported by a spring(9) while integrally connecting a support rod(10) for opening and closing an orifice(12). In case of increase in temperature of a return line(11), the diaphragm is bent to downward for pushing down fuel in the first space unit(6). Therefore, the piston is operated to downward while reducing a gap of the orifice. In case of high pressure fuel in the second space unit(7) discharged through the orifice, the pressure is dropped for lowering temperature.
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