| 摘要 |
PROBLEM TO BE SOLVED: To estimate the inside temperature of an engine on the basis of the measurement value of a water temperature sensor in any state of a state where air supplied to a radiator is limited by a shutter in a situation where a water pump stops, and a state where the air is not limited.SOLUTION: An engine temperature estimation system includes: a water pump 25 that supplies cooling water to a radiator 15; and a shutter 14B that freely switches between a limited state where air supplied to the radiator 15 is limited and a non-limited state where the air is not limited. The engine temperature estimation system include: a first estimation processing part 41A that estimates the inside temperature of an engine 1 in the limited state where supply of air is limited by the shutter 14B; and a second estimation processing part 41B that estimates the inside temperature of the engine 1 in the non-limited state. |
