Control system for a direct injection-spark ignition engine

Details Control system for a direct injection-spark ignition engine Control system for a direct injection-spark ignition engine

1998-11-25

2000-07-11

Yuen, Henry C.

Internal-combustion engines

Combustion chamber means having fuel injection only

Combustible mixture stratification means

123299, 123491, F02B 1700

Patent

active

060857188

ABSTRACT:
An engine control system for a direct injection-spark ignition type of engine which is equipped with a fuel injector for spraying fuel directly into a combustion chamber and an exhaust system having a lean NOx conversion catalyst for lowering an emission level of nitrogen oxides (NOx) in exhaust gas at an air-fuel ratio of .lambda.>1 controls divides a given amount of fuel into two parts which are intermittently delivered through early and late split injection respectively in a intake stroke and controls a fuel injector such that a midpoint between points at which the early and late split injection are timed respectively to start is before a midpoint of a intake stroke while the engine is in a cold condition in an enriched fuel charge zone.

REFERENCES:
patent: 5101785 (1992-04-01), Ito
patent: 5713328 (1998-02-01), Anderson et al.
patent: 5797367 (1998-08-01), Iida et al.

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