Transmission ratio change control during mode transitions in lean burn/DISI engines
US6390948B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 2000 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | Jul 12, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Systems and methods for coordinating control of a DISI engine and automatic transmission determine the current and next engine operating modes and selectively modify or delay a requested transmission ratio change based on the current operating mode of the engine. Ratio changes requested during closed loop stoichiometric operation and during NOx purging cycles are commanded without delay while ratio changes requested during transitions between lean mode operation and stoichiometric operation may be delayed or the current operating mode extended to permit the ratio change to complete. Torque modulation may be provided during the ratio change using air, fuel, and/or spark control depending upon the engine operating mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.