Active torque-split control system for actively distributing driving torques applied to wheels in four-wheel drive vehicles
US5251719A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 1992 |
| Grant date | Oct 12, 1993 |
| Priority date | — |
| Expiry date | Jan 9, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60K23/0808
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An active torque-split control system for actively controlling a distribution of driving torque applied to front and rear wheels in a four-wheel drive vehicle employing a transfer device including a transfer clutch for varying said driving torque distribution depending on the operating state of the vehicle, comprises sensors for monitoring the operating state, and a torque-split controller for switching from a normal torque-split control mode to a rigid torque-split control mode only when the controller determines that the vehicle is operated in a warning region closer to a critical state. The normal torque-split control mode corresponds to a first mode that the rear-wheel driving torque gets priority over the front-wheel driving torque, while the second controllable torque corresponds to a second mode that the transfer ratio of the front-wheel driving torque is quickly increased to be substantially equal to that of the rear-wheel driving torque so as to obtain a front-wheel speed substantially equal to a rear-wheel speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.