| 摘要 |
<p>An apparatus for automatically changing a fuel passage of a diesel engine is provided to automatically switch fuel flow of a fuel supply system although a fuel filter is abnormally assembled. An apparatus for automatically changing a fuel passage of a diesel engine comprises a case(9), a rotor, a pressure switching device and an elastic member(21). The case includes a pump-side port(1) connected with an inlet of a high pressure pump, a return line-side port(3) connected with a fuel return line, a first variable port(5) connected with a fuel filter, and a second variable port(7) connected with a fuel tank. The rotor rotates in the case, and has an initial fluid supply path(11), an initial fluid return path(13), a post fluid supply path(15) and a post fluid return path(17). The pressure switching device allows a state of the rotor before rotation to be supported relative to the case, and enables the rotor to rotate relative to the case if oil pressure of the fuel return line exceeds predetermined pressure.</p> |
