Air-fuel ratio control with improved fuel supply operation immediately after complete combustion of mixture
US6470854B1 · kind B1 · utility
6Cited by
12References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 2, 2000 |
| Grant date | Oct 29, 2002 |
| Priority date | — |
| Expiry date | Jun 2, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/1015
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In an air fuel ratio control for engines, a target operation characteristic of engine speed is set based on a coolant temperature when the engine starts cranking. The target engine speed is variable with time after the engine cranking has started and converges to a speed value lower than a normal target idle speed. Immediately after a complete combustion of air-fuel mixture suplied to the engine is detected, an actual engine speed is compared with a target engine speed corresponding to the target operation characteristics, and an air-fuel ratio of the mixture supplied to the engine is controlled based on a comparison result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.