Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1981-01-26
1982-11-23
Nelli, Raymond A.
Internal-combustion engines
Charge forming device
Fuel injection system
123493, F02M 5100, F02B 300
Patent
active
043599931
ABSTRACT:
Transient fuel control apparatus for an above the throttle fuel injected internal combustion engine includes apparatus effective to measure the time rate of change of throttle position and periodically derive therefrom a first transient correction number, apparatus effective to generate a first order lag filtered induction passage pressure signal, apparatus effective to derive rate of change of the induction passage pressure relative to the filtered induction passage pressure signal and derived therefrom a second transient fuel correction number and apparatus effective to modify the fuel injected into the induction passage from the quantity normally injected during steady state engine operation by an amount derived from the arithmetic sum of the first and second transient fuel correction numbers. The first transient fuel correction number may be calibrated independently to correct for change in the fuel supply necessary due to immediate change in the air flow past the throttle with a change in throttle position; the second transient fuel correction number may be independently calibrated to correct fuel supply for the change necessary due to changes in fuel stored within the manifold under varying induction passage pressure. If the engine includes an idle air bypass passage with an idle air control valve therein, a third transient fuel correction number based on the time rate of change of idle air control valve position may be added to the other to transient fuel correction numbers.
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General Motors Corporation
Nelli Raymond A.
Sigler Robert M.
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