Browse Publications Technical Papers 2013-36-0182
2013-10-07

Presentation of a Software-Based Sensing Approach, which Enables a Full Diesel-Bio-Diesel Flex Fuel Capability by use of an Integral Key-Parameter Technique 2013-36-0182

The paper gives a short introduction to the bio-diesel mixture approach for diesel engines.
The paper continues with a description of 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 short description is made of a baseline approach of sensing technique based on the presence of a crank angle speed sensor. Hereafter the paper presents the introduction of several integral or Upper Level (UL) key-parameters used to enhance the precision of the Bx-detection or completely replace the original lower level combustion key-parameter set, which relates the instantaneous fraction of bio-diesel, Bx, to the engine torque.
The paper concludes presenting a series of experimental verification data obtained on a large-scale series produced 1.3 liter Turbo CR-rail passenger car engine.

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