Abstract
This paper presents a model-based strategy estimating the ethanol content of an ethanol-gasoline blended fuel in flexible fuel vehicles. A steady-state parametric model relating engine speed, throttle angle, and air-fuel ratio to the fuel injector pulse-width is developed from physics. The parameters of this model are adapted and linked to percentage of ethanol content via a suitably defined metric. The proposed steady-state model structure is experimentally validated on a 2005 5.4L V8 Ford engine. The developed ethanol content estimation methodology is justified based on the combustion chemistry and physics involved. The methodology developed has a distinct advantage over previously proposed methods as it uses only the existing sensor set on a production vehicle.
Original language | English (US) |
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Pages (from-to) | 3-13 |
Number of pages | 11 |
Journal | International Journal of Engine Research |
Volume | 13 |
Issue number | 1 |
DOIs | |
State | Published - Feb 2012 |
Keywords
- Automotive control
- Flexible-fuel vehicles
- Parameter estimation
- Spark ignition engines
ASJC Scopus subject areas
- Mechanical Engineering
- Aerospace Engineering
- Automotive Engineering
- Ocean Engineering