Direct injection internal combustion engine with NOx-reduced...

Details Direct injection internal combustion engine with NOx-reduced... Direct injection internal combustion engine with NOx-reduced...

2006-04-04

2006-04-04

Solis, Erick (Department: 3747)

Internal-combustion engines

Combustion chamber means having fuel injection only

Injected fuel spraying into whirling fluid

C123S305000, C123S568140

Reexamination Certificate

active

07021279

ABSTRACT:
A direct injection internal combustion engine, especially an Otto engine, is provided with layered lean operation and internal exhaust-gas recirculation. An exhaust-gas aftertreatment for reducing Nox using an Nox storage catalyst is also provided. This combination is to achieve the highest possible exhaust-gas recirculation rates with the lowest HC and Nox emission values. A tumble flow is provided for the incoming fresh gases, which may contain recirculated exhaust gas from external exhaust-gas recirculation. The swirl axis of the incoming fresh gases therefore extends substantially crosswise to the piston movement. This results in an emissions-reducing, optimal mixture inside the cylinder during the layered lean operation.

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