Engine control to reduce impacts due to transmission gear lash while maintaining high responsiveness to the driver
US6910990B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 2003 |
| Grant date | Jun 28, 2005 |
| Priority date | — |
| Expiry date | Sep 26, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2400/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An engine control system controls engine torque to transition through the transmission and driveline's lash zone. The transmission and driveline's lash zone is indicated using information of the speed ratio across the torque converter. This information is then supplemented with information of the driver's request and vehicle speed so that engine torque is adjusted at various predetermined rates based on current operating conditions. As such, the system can reduce undesired drive feel that otherwise may occur as the system passes through the transmission and driveline's lash zone. By limiting the change of torque in this way, driveability, while at the same time maintaining acceptable performance response.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.