Driving force control system for four-wheel drive vehicles
US6564134B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2001 |
| Grant date | May 13, 2003 |
| Priority date | — |
| Expiry date | Mar 27, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W2710/027
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A driving force control system for a four-wheel drive vehicle for controlling the execution and cancellation of a lock mode in which the engagement forces of clutches for distributing a driving force to auxiliary drive wheels are made maximum. The driving force control system properly controls the engagement forces of clutches for distributing a driving force of the main drive wheels to auxiliary drive wheels. When the vehicle is determined to be in a predetermined low vehicle speed condition and the transmission is in any of predetermined low-speed shift positions, execution of a lock mode is permitted in which the clutch engagement forces are controlled to lock the main and auxiliary drive wheels to each other. When the driving force of the main drive wheels is lower than a predetermined value, the clutch engagement forces for the lock mode are limited to smaller ones than the lockable ones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.