Ignition timing control system for internal combustion engines

Details Ignition timing control system for internal combustion engines Ignition timing control system for internal combustion engines

1997-08-26

1999-03-30

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Fuel injection system

701102, F02P 515

Patent

active

058875700

ABSTRACT:
There is provided an ignition timing control system for an internal combustion engine. An air-fuel ratio sensor is arranged in the exhaust system, for detecting the air-fuel ratio of exhaust gases emitted from a plurality of cylinders of the engine. The air-fuel ratio of a mixture supplied to each of the cylinders is estimated based on an output from the air-fuel ratio sensor, by using an observer for observing an internal operative state of the exhaust system based on a model representative of a behavior of the exhaust system. The ignition timing of the each cylinder of the engine is controlled based on the estimated air-fuel ratio of the mixture supplied to the each cylinder.

REFERENCES:
patent: 5148791 (1992-09-01), Nagano et al.
patent: 5383432 (1995-01-01), Cullen et al.
patent: 5448975 (1995-09-01), Sato
patent: 5732689 (1998-03-01), Ohno et al.
patent: 5806506 (1998-09-01), Kitamura et al.

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