| 摘要 |
PURPOSE:To give alarm of correct lubricant replacement timing considering deterioration generated by load by correcting output timing of lubricant replacement alarm based on external temperature. CONSTITUTION:Engine oil temperature, cooling water temperature and external temperature detected by an engine oil temperature sensor 2, cooling water sensor 3 and an external temperature sensor 4 are level-converted according to characteristic curves shown in converting units 2a, 3a, 4a respectively and output as coefficients C1, C2, and C3 to an operating unit 5 as well as with engine rotating number. The converting characteristic of the converting unit 4a is designed to output the coefficient C3 as a large value when the external temperature input is low. |
