Apparatus and methods for estimating vehicle fuel composition
US7159623B1 · kind B1 · utility
17Cited by
3References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 22, 2005 |
| Grant date | Jan 9, 2007 |
| Priority date | — |
| Expiry date | Sep 22, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/30
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method of estimating composition of fuel in the fuel tank of a vehicle. A refuel event is detected. Fuel consumption is monitored during a plurality of stages after the refuel event. A plurality of fuel trim shift values are determined relative to the stages. The fuel trim shift values are used to estimate a fuel composition change. This method eliminates a need for a hardware fuel composition sensor and also provides dynamic filtering of fuel trim values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.