Combustion control system of internal combustion engine

Details Combustion control system of internal combustion engine Combustion control system of internal combustion engine

2006-09-05

2006-09-05

Tran, Binh Q. (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

C060S278000, C060S286000, C060S297000, C060S301000

Reexamination Certificate

active

07100365

ABSTRACT:
In a combustion control system, a control unit determines, based on an operating condition of an exhaust purifying device, whether a request for an exhaust temperature rise or a rich A/F ratio engine operating mode is present. The control unit executes, by way of fuel injection control in presence of the request of the exhaust temperature rise or the rich operating mode, a split retard combustion mode in which a main combustion needed to produce a main engine torque and at least one preliminary combustion occurring prior to the main combustion are both achieved, and the preliminary combustion occurs near top dead center on a compression stroke, and the main combustion initiates after completion of the preliminary combustion. The control unit simultaneously executes an exhaust-emission reduction control that reduces HC and CO emissions, while keeping the excess air factor at a desired value in the catalyst deactivated state.

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