System and method for determining ethanol content in fuel
US7523723B2 · kind B2 · utility
6Cited by
2References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2007 |
| Grant date | Apr 28, 2009 |
| Priority date | — |
| Expiry date | Nov 1, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/30
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A system and method are provided for determining an ethanol content of a fuel that is part of a fuel and air mixture combusted within an internal combustion engine. A pressure characteristic of a fuel rail is monitored during operation of the engine. At least one of an effective bulk modulus of the fuel and a pressure perturbation signature is determined based on the pressure characteristic. The ethanol content is determined based on the at least one of the effective bulk modulus and the pressure perturbation signature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.