| 摘要 |
PURPOSE:To perform the replacement of oil in a rational manner and display a stable performance of a diesel engine, by providing a pH sensor in an oil pan of the diesel engine and operating a solenoid valve and an oil drain pump for removing the oil when the oil is deteriorated. CONSTITUTION:In an oil pan 2 of an engine 1 a pH sensor 21 is provided to detect the degree of deterioration of oil and operate a soleniod valve 8 and oil drain pump 6 through a control circuit 22. An oil drain pipe 7 and return pipe 13 are merged to feed the old oil to a fuel tank 11 with return fuel. The mixed fuel with the oil is again fed to an injection pump 12 through a fuel-water separator 14 and a filter 15. In this way, in accordance with the degree of deterioration of the oil the oil is automatically replaced capable of displaying a stable performance of the engine. |
