Control system for internal combustion engine

Details Control system for internal combustion engine Control system for internal combustion engine

2007-01-16

2007-01-16

Huynh, Hai (Department: 3747)

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

C123S480000

Reexamination Certificate

active

11178372

ABSTRACT:
A control system for an internal combustion engine, which is capable of optimally controlling fuel injection by an injector even in a transient state of the engine. An ECU2of the engine provided with an EGR system (14) controls the amount (Fa) of air drawn into cylinders (3a) via an intake system (4). An air flow sensor (27) detects the intake air amount (Fa). The ECU2estimates a flow rate (Fe_hat) of EGR gases according to response delay of recirculation of the EGR gases by the EGR system (14), estimates the amount (mo2) of oxygen existing in the cylinder (3a), based on the detected intake air amount (Fa) and the estimated flow rate (Fe_hat) of the EGR gases, determines a fuel injection parameter (Q*) based on the engine speed (Ne) and the estimated in-cylinder oxygen amount (mo2), and controls an injector (6) based on the determined fuel injection parameter (Q*).

REFERENCES:
patent: 6508241 (2003-01-01), Miller et al.
patent: 6993909 (2006-02-01), Matsunaga et al.
patent: 2005/0114011 (2005-05-01), Itoyama
patent: 10-103162 (1998-04-01), None
patent: 2006-29171 (2006-02-01), None

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