Two-wheel/four-wheel drive switching device for vehicle
US6935452B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2003 |
| Grant date | Aug 30, 2005 |
| Priority date | — |
| Expiry date | May 6, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60K23/08
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The two-wheel/four-wheel drive switching device including a switching unit provided in either a power transmitting mechanism interposed between an engine and front wheels or a power transmitting mechanism interposed between the engine and rear wheels for switching between the continuation and interruption of power transmission in the power transmitting mechanism, and a control unit for controlling the switching unit. The control unit detects a drive current supplied to the switching unit and performs variable duty control to maintain the drive current at a given value. As a result, the two-wheel/four-wheel drive switching device reduces the generation of noise and greatly suppresses the consumption of power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.