Development of a New In-vehicle Sensing Method to Instantaneously Measure the Mixture Fraction of Bio-diesel Present in a Crude Oil based Classic Diesel Fuel

Paper #:
  • 2013-01-1745

Published:
  • 2013-04-08
Citation:
Pontoppidan, M. and Montanari, G., "Development of a New In-vehicle Sensing Method to Instantaneously Measure the Mixture Fraction of Bio-diesel Present in a Crude Oil based Classic Diesel Fuel," SAE Technical Paper 2013-01-1745, 2013, https://doi.org/10.4271/2013-01-1745.
Pages:
11
Abstract:
The paper gives a short introduction to the notion of flex fuel approach for diesel engines.The paper continues with a description of a basic study of the diesel combustion process to allow the design of a strategy for recognition of a random bio-diesel fraction, Bx, by a purely software-based sensing technique, which creates an image of the temporal combustion behavior and uses only sensors already in service for current common rail mixture preparation systems.A description is made of two different approaches to software- based sensing techniques, one based on the presence of a crank angle speed sensor and the other on the presence of a lambda sensor in the exhaust system. The principles of the associated software flow diagrams embedded in the engine control unit are also explained.The paper concludes presenting a series of experimental verification data obtained on a large-scale series produced 1.3 liter turbo-charged common rail passenger car engine.
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