Fuel controller for an internal combustion engine
US4911128A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 1, 1989 |
| Grant date | Mar 27, 1990 |
| Priority date | — |
| Expiry date | Feb 1, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel controller for an internal combustion engine has a Karman vortex air flow sensor for sensing the air flow rate into the air intake pipe of the engine and producing an electrical output signal having a frequency which is proportional to the air flow rate. A load sensor determines the air flow rate into an air intake pipe based on the output of the air flow sensor. A determining mechanism determines whether the output of the air flow sensor is reliable. A calculator calculates the actual air intake rate into the engine according to a first formula which employs the most recent output of the load sensor when the determining mechanism determines that the output of the air flow sensor is reliable, and it calculates the actual air intake rate according to a second formula which ignores the most recent output of the air flow sensor when the determining mechanism determines that the output of the air flow sensor is not reliable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.