Process for use with dual-fuel systems

Details Process for use with dual-fuel systems Process for use with dual-fuel systems

2008-06-17

2008-06-17

Kwon, John T (Department: 3747)

Internal-combustion engines

Burning by highly compressed air

Oil engine air preheated

C123S525000, C123S672000

Reexamination Certificate

active

07387091

ABSTRACT:
A system and method is provided to reduce the occurrence of engine knock for engines that utilize a dual-fuel fumigation system. Typically, dual fuel systems inject 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. Such dual fuel systems are susceptible to engine knocking due to premature detonation of the gaseous fuel air intake mixture that is often caused by sudden changes to the operating conditions of the engine. The present system utilizes a knock sensor to identify early stages of such engine knocking. To eliminate such engine knocking conditions, the system temporarily interrupts the gaseous fuel flow to resume operation in full diesel mode. The gaseous fuel flow is then reestablished based on the present operating conditions of the engine.

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