| 摘要 |
PURPOSE:To prevent seizure by calculating the viscosity of lubricating oil from the thickness of an oil film and the revolution speed of an engine and comparing said viscosity with a preset value and transmitting alarm when the viscosity of the lubricating oil is below the preset value. CONSTITUTION:A detector 15 detects the thickness of a lubricating-oil film and calculates the viscosity (m) of the lubricating-oil during engine operation by a calculating circuit 19, according to the revolution speed of a cam shaft 11. Then, a judging circuit 21 compares the viscosity calculated in the calculation circuit 19 and the allowable viscosity set beforehand, and when it is judged that the lubricating oil is deteriorated, an alarm signal is transmitted. Therefore, the increase of abrasion between the slidable surfaces and the generation of seizure can be prevented beforehand. |
