Transient fuel compensation

Internal-combustion engines – Charge forming device – Fuel injection system

Patent

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F02M 5100

Patent

active

060034963

ABSTRACT:
Transient internal combustion engine fueling control with reduced calibration burden and increased precision through application of a convection model to estimate the mass transfer of fuel between cylinder intake gasses and intake system components primarily as a function of fuel film temperature and gas flow across fuel film on such components. The convection model applies potential/flow conditions in proximity to fuel film on intake components of an engine cylinder to predict the depletion of the fuel film and generates an impact factor representing the fraction of injected fuel impacting intake system components in a manner providing fuel control stability. The convection model applies an intake valve temperature estimate generated simply as a function of air mass flow rate through the intake system to be used in the calculation of the film convection parameters.

REFERENCES:
patent: 5494019 (1996-02-01), Ogawa
patent: 5586544 (1996-12-01), Kitamura et al.
patent: 5701871 (1997-12-01), Munakata et al.
patent: 5806012 (1998-09-01), Maki et al.
patent: 5832901 (1998-11-01), Yoshida et al.
patent: 5868118 (1999-02-01), Yoshioka
patent: 5893039 (1999-04-01), Pfefferle

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