Cold idle adaptive air-fuel ratio control utilizing lost fuel approximation
US7426926B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2006 |
| Grant date | Sep 23, 2008 |
| Priority date | — |
| Expiry date | Nov 2, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/2441
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method for controlling fueling of an engine, the method comprising during an engine cold start and before the engine is warmed to a predetermined level, transitioning from open-loop fueling to closed-loop fueling, where during closed-loop fueling feedback from an exhaust gas oxygen sensor is utilized and where said closed-loop fueling generates a cycling of delivered fuel in maintaining exhaust air-fuel ratio at a desired level; and providing a fueling adjustment to a subsequent engine start in response to fueling information, said fueling information obtained over at least a complete cycle of closed-loop fueling following said transition from open-loop fueling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.