Two-wheel-drive/four-wheel-drive switching system for vehicle
US6758297B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2002 |
| Grant date | Jul 6, 2004 |
| Priority date | — |
| Expiry date | Dec 17, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60K17/35
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A two-wheel-drive/four-wheel-drive switching system for a vehicle wherein noise is reduced and a state of drive can be securely indicated. A two-wheel-drive/four-wheel-drive switching system for a vehicle is provided with a switching unit provided to either of power transmission mechanisms connecting an engine and front wheels, and the engine and rear wheels via final reduction gear units for enabling or disabling the transmission of power in the power transmission mechanism. An indication control member is provided for detecting that the transmission of power is made in the power transmission mechanism and illuminates an indicator wherein the indication control means detects a phase difference in revolutions between a pair of final reduction gear units and illuminates or turns off the indicator when the phase difference is in a predetermined range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.