Fumigation system for a diesel engine

Internal-combustion engines – Burning by highly compressed air – Oil engine air preheated

Reexamination Certificate

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Details

C123S525000, C123S672000

Reexamination Certificate

active

11099726

ABSTRACT:
A system and method is provided to reduce particulate and NOxemissions from diesel engines through the use of a duel-fuel fumigation system. The system injects a gaseous-fuel flow into the air intake stream of a diesel engine. This results in more complete combustion within the engine as well as reduced diesel fuel usage, which each work to reduce emission outputs of the engine. As presented, the system is operative to meter the gaseous-fuel flow into the diesel engine based on one or more engine parameters such as, for example, exhaust gas temperature, exhaust oxygen levels, engine speed and/or engine load. Monitoring one or more engine parameters allows fine-tuning the flow of gaseous fuel into the engine and thereby prevents loss of engine power at high-end loads while maintaining favorable emission outputs over substantially the entire operating range of the engine.

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