Control device for spark-ignition engine

Details Control device for spark-ignition engine Control device for spark-ignition engine

2005-11-29

2005-11-29

Mohanty, Bibhu (Department: 3747)

Internal-combustion engines

Spark ignition timing control

C123S406300, C123S406120, C123S406260, C123S406340, C123S406470

Reexamination Certificate

active

06968825

ABSTRACT:
A control device for a spark-ignition engine, in which a mixture in a combustion chamber is fired by compression ignition in a part-load range under warm-running conditions, includes an EGR controller incorporating a valve operation controller for controlling internal EGR of hot burned gas and a cold EGR controller for controlling external EGR of cold burned gas. The EGR controller performs EGR control operation to leave the hot EGR gas in the combustion chamber in a lower-load, lower-speed region within a compression ignition combustion range and to introduce the cold EGR gas into the combustion chamber in a higher-load, higher-speed region within the compression ignition combustion range. The control device further includes a firing assist unit for inducing the compression ignition at least when ignitability of the mixture decreases due to introduction of the cold EGR gas in the compression ignition combustion range.

REFERENCES:
patent: 4194472 (1980-03-01), Amano et al.
patent: 4237832 (1980-12-01), Hartig et al.
patent: 5012782 (1991-05-01), Tokuda
patent: 6336436 (2002-01-01), Miyakubo et al.
patent: 2001/0017123 (2001-08-01), Raab et al.
“Development of New Concept Three-Way Catalyst for Automotive Lean-Burn Engines”, XP-000863313, pp. 1361-1370.

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