Four-wheel drive control system
US6035988A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 1998 |
| Grant date | Mar 14, 2000 |
| Priority date | — |
| Expiry date | Apr 13, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60K23/08
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A control system for a 4WD vehicle has a rotation transmission device which can prevent a two-way clutch of the rotation transmission device from vibrating by repeatedly locking and unlocking when the vehicle is started in a cold environment. The rotation transmission device is mounted in the transfer. The transfer is provided with a temperature sensor for measuring the temperature of oil in the transfer. If the oil temperature as measured by the temperature sensor is below a predetermined value when the vehicle is started with the drive mode set at the 2WD position, the hub clutches are engaged to reduce the idling speed of the two-way clutch and thus to prevent the two-way clutch from locking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.