Method of operating a transmission system of an automotive vehicle of the four-wheel drive type comprising a means of mechanically coupling the first and second axles
US9079577B2 · kind B2 · utility
0Cited by
19References
12Claims
0Family size
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Key dates
| Filing date | Apr 11, 2011 |
| Grant date | Jul 14, 2015 |
| Priority date | — |
| Expiry date | Sep 30, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W2720/403
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A method of operating a transmission system of an automotive vehicle, the transmission system including a mechanism of mechanically coupling first and second axles of the transmission system, a status of the coupling mechanism defining a number of transmission modes. In the method, if the automotive vehicle crosses a speed threshold for a determined length of time, for example between 30 seconds and two minutes, the transmission system switches from a first mode in which the torque that can be transmitted by the mechanical coupling mechanism is fixed, into a different transmission mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.