Fuel metering control system in internal combustion engine

Details Fuel metering control system in internal combustion engine Fuel metering control system in internal combustion engine

1995-07-27

1996-08-20

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Fuel injection system

123492, F02D 4110, F02D 4118

Patent

active

055469078

ABSTRACT:
A system for controlling fuel metering in an internal combustion engine using a fluid dynamic model with the quantity of throttle-past air being determined therefrom. Based on the observation that the difference between the steady-state engine operating condition and the transient engine operating condition can be described as the difference in the effective throttle opening areas, the quantity of fuel injection is determined from the product of the ratio between the area and its first-order lag value and the quantity of fuel injection under the steady-state engine operating condition obtained by mapped data retrieval and by subtracting the quantity of correction corresponding to the quantity of chamber-filling air. A pseudo-manifold pressure is estimated and is used for calculating the effective throttle opening area and its first lag value. The pseudo-manifold pressure is corrected by atmospheric pressure, engine coolant water temperature, etc., so as to enhance estimation accuracy.

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