| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and a device for controlling oil temperature capable of improving transmission efficiency, and restricting deterioration of fuel economy by controlling the engine cooling water side. SOLUTION: (1) In this method and device for controlling oil temperature, oil from a subject machine to be lubricated (transmission) 1 is circulated to an oil heat exchanger (transmission oil heat exchanger) 2 disposed in an oil heat exchanger disposition part (transmission oil heat exchanger disposition part) 4 in a radiator 3 to control oil temperature in such a way that temperature of engine cooling water around the oil heat exchanger 2 in the oil heat exchanger disposition part 4 rises or not lowered almost at all. (2) During engine warm-up, hot water during the engine warm-up is sent around the oil heat exchanger 2. (3) Application of cooling water passing the radiator to the oil heat exchanger 2 during light-load and high-speed driving is prevented by providing a partition in the oil heat exchanger disposition part 4. (4) An opening/ closing shutter is provided on the radiator to prevent cooling water from being excessively cooled.
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