Internal combustion engine control apparatus

Details Internal combustion engine control apparatus Internal combustion engine control apparatus

1995-11-21

1996-11-05

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

F02D 4100

Patent

active

055706738

ABSTRACT:
Internal combustion engine control apparatus determines activation status of the O.sub.2 sensor and feasibility of feedback control. If the O.sub.2 sensor is activated and the feedback control is feasible, the apparatus computes a corrected fuel injection duration TAU based on feedback control using detected O.sub.2 concentration. For EGR control, the apparatus selects one of the two maps to retrieve EGR valve opening data based on the feasibility of feedback control, thus achieving an EGR flow in accordance with the selected air-fuel ratio control mode. The combination of the air-fuel ratio control and the EGR control achieves reduction of harmful exhaust gas components and stabilization of engine operation during an initial period after the start of engine operation.

REFERENCES:
patent: 5143040 (1992-09-01), Okawa et al.
patent: 5237983 (1993-08-01), Willey et al.
patent: 5245978 (1993-09-01), Orzel
patent: 5423203 (1995-06-01), Namiki et al.
patent: 5426934 (1995-06-01), Hunt et al.
patent: 5433185 (1995-07-01), Toyoda
patent: 5499617 (1996-03-01), Kitajima et al.

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