Methods and systems for engine control
US10830169B1 · kind B1 · utility
7Cited by
0References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 20, 2019 |
| Grant date | Nov 10, 2020 |
| Priority date | — |
| Expiry date | May 20, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Methods and systems are provided for improving fuel efficiency and tailpipe emissions of a variable displacement engine. Fueling is initially disabled in cylinders selected to be deactivated while pumping air through the cylinders to an exhaust after-treatment catalyst, and then valve operation is disabled. On reactivation, if manifold vacuum is dissipated, one bank of cylinders are reactivated while the other bank is operated in DFSO with valves pumping air until manifold vacuum is reestablished.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.