Low emission dual fuel engine and method of operating same

Details Low emission dual fuel engine and method of operating same Low emission dual fuel engine and method of operating same

1989-04-12

1990-09-11

Cross, E. Rollins

Internal-combustion engines

Burning by highly compressed air

Oil engine air preheated

123577, 123576, 123472, F02B 300

Patent

active

049553267

ABSTRACT:
A dual fuel engine system and method of operating the engine reduces emission rates of polutants. The dual fuel engine includes a fuel oil supply connected to the engine and a fuel gas supply connected to the engine. Means connected between the fuel oil supply and the engine inject low levels of diesel fuel into the engine. In particular, the injection of diesel fuel is limited to pilot injection quantities only. The exhaust emission of NOx is maintained at less than 1 GM/HP-HR, where natural gas is used as the primary fuel, and less than 0.5 GM/HP-HR where digester gas is used as the primary fuel.

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patent: 4817568 (1989-04-01), Bedford

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