Control apparatus for a direct injection engine and control meth

Details Control apparatus for a direct injection engine and control meth Control apparatus for a direct injection engine and control meth

1998-11-25

2000-12-05

Argenbright, Tony M.

Internal-combustion engines

Combustion chamber means having fuel injection only

Combustible mixture stratification means

123698, F02B 1700, F02D 4114, F02M 2507

Patent

active

061552275

ABSTRACT:
A control apparatus for an engine includes a burn mode determining unit for determining a stoichiometric burn mode or a lean burn mode, and a stratified charge burn mode or a homogeneous charge burn mode. A target A/F calculating unit calculates a target A/F according to the operational point of the engine and a phase lag filter changes the phase of said calculated target A/F. A first target A/F modifying unit modifies the target A/F whose phase is delayed, so that an unstable burn region is avoided and a second target A/F modifying unit further modifies the modified target A/F during a transitional period when the operation is switched so as to avoid the unstable region. A target A/F selecting unit selects one of the modified A/F modified by the first target A/F modifying unit and the target A/F modified by the second A/F modifying unit.

REFERENCES:
patent: 5848580 (1998-12-01), Mashiki
patent: 5979396 (1999-11-01), Yasuoka

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