Air-fuel ratio control system for multi-cylinder engine
US6804953B2 · kind B2 · utility
2Cited by
6References
30Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 18, 2002 |
| Grant date | Oct 19, 2004 |
| Priority date | — |
| Expiry date | Dec 18, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An engine control system has a controller and intake control devices for controlling air amount introduced into each of the cylinders. The controller has a lean burn control block and a warm up control block. Both blocks operate two cylinders under a lean air-fuel ratio, and operate remaining two cylinders under a rich air-fuel ratio. Both blocks control at least the intake control devices to adjust air-fuel ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.