Four-wheel drive vehicle
US11072238B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2019 |
| Grant date | Jul 27, 2021 |
| Priority date | — |
| Expiry date | Mar 13, 2040 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2500/7041
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A four-wheel drive vehicle in which, when a switching request is made for switching from a non-meshing state to a meshing state, the control device calculates a first rotation speed difference between the drive-power-source-side meshing teeth and the sub-drive-wheel-side meshing teeth, and a second rotation speed difference between the drive-power-source-side meshing teeth and the sub-drive-wheel-side meshing teeth. If at least one of the calculated first and second rotation speed differences is within a predetermined range set in advance, the control device couples the sub-drive wheel corresponding to the rotation speed difference within the predetermined range, to the central axle by the control coupling to switch the dog clutch from the non-meshing state to the meshing state. And, if neither the calculated first nor second rotation speed difference is within the predetermined range, the control device prohibits switching of the dog clutch from the non-meshing state to the meshing state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.