Twin-model method for ethanol detection in flex fuel vehicles | IEEE Conference Publication | IEEE Xplore

Twin-model method for ethanol detection in flex fuel vehicles

Publisher: IEEE

Abstract:

In this paper we propose to use volatility difference between gasoline and ethanol to detect the ethanol percent. The approach relies on a well-calibrated model of the wa...View more

Abstract:

In this paper we propose to use volatility difference between gasoline and ethanol to detect the ethanol percent. The approach relies on a well-calibrated model of the wall-wetting effect, a condition satisfied by today's engine controllers. Because of its complexity, we essentially treat the model as a black box, but with an important difference that the model can be duplicated. Thus, a pair of identical wall wetting (transient fuel) models is driven by different ethanol content and the difference in the resulting predicted air-fuel ratios is used to update the ethanol estimate. It turns out that this volatility-based estimate is very insensitive to sensor and injector biases and drifts. The approach is backed by stability analysis as well as by simulation results and post-processing experimental vehicle data.
Date of Conference: 17-19 June 2013
Date Added to IEEE Xplore: 15 August 2013
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ISSN Information:

Publisher: IEEE
Conference Location: Washington, DC, USA

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