| 摘要 |
PROBLEM TO BE SOLVED: To notify that an oil level exceeds a predetermined upper limit at a proper timing by precisely determining whether or not the oil level exceeds the upper limit when the oil level cannot be directly detected by an oil level sensor.SOLUTION: An oil level detection device comprises: an ultrasonic oil level sensor SW9; a characteristic calculation part 10d for calculating an oil lever variation characteristic from when an oil level average value is first calculated until the oil level average value is determined as NG after a line is turned off or oil is changed, on the basis of a detection value of the oil level sensor SW9; a determination part 10f for determining wether or not the oil level average value exceeds a predetermined upper limit on the basis of the oil level variation characteristic calculated by the characteristic calculation part 10d; and an oil lamp 73 for notifying when the determination part 10f determines that the oil level average value exceeds the predetermined upper limit. |
