GEAR DEVICE AND VEHICLE HAVING SAME MOUNTED THEREON
First Claim
1. A gear device which adjusts a temperature of lubricating oil by supplying the lubricating oil from a lower part of an enclosure of the gear device into a heat exchanger by means of a circulation pump and causing the lubricating oil and cooling water for an internal combustion engine to exchange heat with each other in the heat exchanger, comprising:
- a level of the lubricating oil retained in the lower part when the circulation pump is stopped is defined as a highest oil level, while the level of the lubricating oil retained in the lower part when an amount of the lubricating oil pumped up by the circulation pump is maximum is defined as a lowest oil level,the heat exchanger is disposed at a position outside the enclosure and higher than the highest oil level, andthe gear device includes a control device which controls the amount of the oil to be pumped up by the lubricating pump to adjust a height of the level of the oil which varies between the highest oil level and the lowest oil level.
1 Assignment
0 Petitions
Accused Products
Abstract
A gear device in which lubricating oil for cooling and lubricating gears to be driven therein is adjusted to a temperature and an amount suitable for the speed of a vehicle, and a vehicle having the gear device mounted thereon. A transmission adjusts the temperature of lubricating oil by supplying the lubricating oil from a lower part of a housing of the transmission into a heat exchanger by a circulation pump and causing the lubricating oil and engine cooling water to exchange heat with each other in the heat exchanger. A level of the lubricating oil retained in an oil pan when the circulation pump is stopped is defined as a highest oil level, while the level of the lubricating oil retained in the oil pan when the amount of the lubricating oil pumped up by the circulation pump is maximum is defined as a lowest oil level. The heat exchanger is disposed at a position outside the housing and higher than the highest oil level. The transmission includes a device which controls the amount of the oil to be pumped up by the lubricating pump to adjust the height of the level of the oil which varies between the highest oil level and the lowest oil level.
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Citations
7 Claims
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1. A gear device which adjusts a temperature of lubricating oil by supplying the lubricating oil from a lower part of an enclosure of the gear device into a heat exchanger by means of a circulation pump and causing the lubricating oil and cooling water for an internal combustion engine to exchange heat with each other in the heat exchanger, comprising:
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a level of the lubricating oil retained in the lower part when the circulation pump is stopped is defined as a highest oil level, while the level of the lubricating oil retained in the lower part when an amount of the lubricating oil pumped up by the circulation pump is maximum is defined as a lowest oil level, the heat exchanger is disposed at a position outside the enclosure and higher than the highest oil level, and the gear device includes a control device which controls the amount of the oil to be pumped up by the lubricating pump to adjust a height of the level of the oil which varies between the highest oil level and the lowest oil level. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification