Vehicle drive system
US10336337B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2017 |
| Grant date | Jul 2, 2019 |
| Priority date | — |
| Expiry date | Aug 15, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/72
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A vehicle drive system includes a slip acquisition unit that acquires occurrence of excessive slip, an addition slip point calculating unit that calculates addition slip points in a time-discrete manner, based on having acquired that the excessive slip has occurred, a cumulative slip point calculating unit that accumulates the addition slip points and calculates a cumulative slip point over time, a drive state switching unit that switches between 2WD and AWD based on cumulative slip points and a drive state switching threshold value, and a cumulative slip point resetting unit triggered by a lateral acceleration correlation value of the vehicle reaching a lateral acceleration threshold value or higher, or a drive force correlation value of the drive wheels reaching a drive force correlation threshold value or higher, to reset the cumulative slip point to a value smaller than the drive state switching threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.