Methods and systems for reducing engine exhaust emissions
US11480122B1 · kind B1 · utility
0Cited by
5References
16Claims
0Family size
Assignee
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Key dates
| Filing date | May 24, 2021 |
| Grant date | Oct 25, 2022 |
| Priority date | — |
| Expiry date | May 24, 2041 |
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 cylinder deactivation to reduce tailpipe emissions and increase exhaust temperature. In one example, a method may include operating a first set of cylinders in a first combustion cycle over modified eight strokes and a second set of cylinders in a second combustion cycle over modified four strokes. Each cylinder in the first set of cylinders may be selectively deactivated via a variable displacement engine (VDE) mechanism while each cylinder in the second set of cylinders may be selectively deactivated via an active decompression technology (ADT) mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.