Internal combustion engine air-fuel ratio control system including alcohol sensor back-up control arrangement
US4986241A · kind A · utility
15Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 21, 1990 |
| Grant date | Jan 22, 1991 |
| Priority date | — |
| Expiry date | Feb 21, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/30
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
If an alcohol sensor which determines the amount of alcohol which is mixed with gasoline, malfunctions, the fuel supply correction factor which is designed to modify the basic fuel supply amount to compensate for the amount of alcohol, is prevented from being changed in accordance with the output of the alcohol sensor, and temporarily calibrated by feedback from the air-fuel ratio sensor disposed in the exhaust system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.