Scaling of side-to-side torque bias to improve cornering in a programmable four wheel drive system
US7455142B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 5, 2005 |
| Grant date | Nov 25, 2008 |
| Priority date | — |
| Expiry date | Jan 12, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W30/045
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The present invention provides a method for improving cornering performance. From a given vehicle speed and lateral acceleration, in instances of a decrease in drive torque, individual wheel torque is shifted from inside wheels to outside wheels to increase vehicle yaw forces and counteract the understeer phenomenon. Similarly, in instances of increasing drive torque, individual wheel torque is shifted from outside wheels to inside wheels on a common axle to reduce vehicle yaw forces and counteract the oversteer phenomenon. Actual implementation of side-to-side torque shifting is done using a correction factor multiplied by other factors within a general torque shift equation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.