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

1993-10-18

1994-09-27

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Fuel injection system

123492, F02D 4110

Patent

active

053499336

ABSTRACT:
A system for controlling fuel metering in an internal combustion engine using a fluid dynamic model and the cylinder air flow past the throttle is determined therefrom. Based on the observation that the difference between a steady-state engine operating condition and a transient engine operating condition can be described as the difference in the effective throttle opening areas, the amount of fuel injection is determined from the product of the ratio between the areas and a basic fuel injection amount under the steady-state engine operating condition obtained by mapped data retrieval and by subtracting a correction amount corresponding to an air flow filling a chamber between the throttle and the cylinder from the product. Under steady-state engine operation, the correction amount becomes zero. In an embodiment, the first-order lag of a detected throttle opening is calculated and based on the value, various parameters including a pseudo manifold pressure are obtained so as to solve sensors' detection timing lag or a pressure sensor's detection lag.

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