Gear device and vehicle having same mounted thereon
US9212575B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 10, 2012 |
| Grant date | Dec 15, 2015 |
| Priority date | — |
| Expiry date | May 10, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H57/0449
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.