| 摘要 |
PURPOSE:To prolong the working time of an engine by lessening the fuel pressure range limited by a high pressure regulator in a fuel feed system of a compressed natural gas engine. CONSTITUTION:A pressure gauge 3, high pressure regulator 4 and low pressure regulator 5 are provided sequentially from the gas cylinder side in a fuel feed path 2 connecting the gas cylinder 1 to an engine. Bypass paths 6 are provided before and after the high pressure regulator. When fuel pressure detected by the pressure gauge is reduced less than a prescribed value, the bypass path 6 is opened by a switch valve 7 to bypass the high pressure regulator, i.e., fuel can be fed to the engine even if the fuel pressure is less than the set pressure of the high pressure regulator, so that the working time of the engine is prolonged. |
