System and method for maintaining a vehicle at zero speed on a graded surface
US6896340B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 2003 |
| Grant date | May 24, 2005 |
| Priority date | — |
| Expiry date | Sep 17, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T2201/06
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Methods and apparatus are provided for determining when vehicle powertrain torque is being used to substantially maintain a vehicle at a substantially zero speed on a graded surface, and to shift the supplied torque from the powertrain to another vehicle system or component. A vehicle controller determines that the powertrain system is supplying a hold torque, which has a magnitude sufficient to substantially maintain the vehicle at a substantially zero speed on the graded surface. A brake torque at a magnitude at least equivalent to the hold torque is automatically applied from the vehicle brake system to thereby maintain the vehicle at the substantially zero speed. Thus, the powertrain system can remove the torque it is supplying to hold the vehicle at the substantially zero speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.