Controller of cylinder injection type internal combustion...

Details Controller of cylinder injection type internal combustion... Controller of cylinder injection type internal combustion...

2006-02-21

2006-02-21

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...

C060S286000, C060S278000, C123S090150, C123S568110, C123S568140, C123S295000, C123S305000

Reexamination Certificate

active

07000380

ABSTRACT:
The present invention is intended to provide a control system for an direct injection internal combustion engine capable of effectively reducing the amounts of both HC and NOx exhausted from a combustion chamber during a period from the start of the engine operation to the stop of the engine operation. It comprises an external EGR passage (11) for returning a part of exhaust gas from an exhaust pipe (10) to an intake pipe (5), an external EGR control valve (12) for controlling an amount of exhaust gas returned to the external EGR passage (11), and a valve timing varying mechanism (9A,9B) for varying timing of opening and closing at least one of an intake valve and an exhaust valve. An ECU100controls the valve timing varying mechanism (9A,9B) to always return internal EGR gas in an operation region where exhaust gas recirculation is required, and controls the external EGR control valve (12) to return exhaust gas in a combination of internal EGR and external EGR when an internal EGR rate provided by the valve timing varying mechanism (9A,9B) is not sufficient to satisfy an EGR rate demanded depending on an operation state.

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