Method of reducing exhaust gas emissions during cold start...

Details Method of reducing exhaust gas emissions during cold start... Method of reducing exhaust gas emissions during cold start...

2006-10-24

2006-10-24

Argenbright, T. M. (Department: 3747)

Internal-combustion engines

Combustion chamber means having fuel injection only

Using multiple injectors or injections

C123S090150, C123S305000

Reexamination Certificate

active

07124734

ABSTRACT:
An internal combustion engine and a method of reducing hydrocarbon emissions of an internal combustion engine during cold start conditions in disclosed. The engine has at least one cylinder provided with a piston which reciprocates between a top dead-center and a bottom dead-center, at least one intake valve through which intake air is provided, a fuel injector assembly arranged to inject atomised fuel particles directly into the cylinder and means for controlling the opening and closing of the intake valve. According to the invention, intake valve opening is adjusted to occur after top dead center of the piston. When the intake valve opens, a pressure differential exists across the valve. Fuel is injected directly into the cylinder during the time of the pressure differential.

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