Cooper Industries, Inc.

Gas Research Institute

Melvin J Helmich

Richard C Peoples

Vaughn A Squires

Fred S Schaub

Melvin C Hoagland

Robert L Hubbard

David H Marvin

William P Ryan

An apparatus and method for establishing parallel flow to and from a plurality of turbochargers operating in parallel. The turbochargers are mounted on a manifold that has a high pressure chamber and a low pressure chamber. A plurality of turbines are mounted to the manifold so that each turbine inlet is in communication with the high pressure chamber and each turbine outlet is in communication with the low pressure chamber. Each turbine inlet is sized, shaped and positioned to accommodate a designed proportional mass flow rate to each corresponding turbine. A programmed logic controller and suitable control valve can be used to bypass a portion of the engine exhaust gas from the high pressure chamber directly to the low pressure chamber. The amount of bypassed engine exhaust gas can be controlled to vary the power output of turbines.

Apparatus and method for mounting and operating multile turbochargers in

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.

Low emission dual fuel engine and method of operating same

Disclosed herein is an apparatus which is adapted for controlling fuel flows for dual fuel compression ignition engines. The disclosed system includes a lag fuel governing system in conjunction with a lead fuel governing system which includes spontaneous motion metering means. The lag fuel governing system includes means for providing a first signal indicative of the position of the lead fuel metering means, which signal approximates total load on the engine; means for providing a second signal representative of a selected percentage of lead fuel relative to total load; means for controlling flow of said lag fuel to said engine, which flow causes movement of said lead fuel metering means; means for determining the difference between said first signal and said second signal, which difference is indicative of distance the lead fuel metering means must be moved to attain the selected percentage of lead fuel relative to total load; and means for causing operation of said means for controlling flow of said lag fuel to said engine to cause movement of said lead fuel metering means equal to the distance the lead fuel rack must be moved to attain the select percentage of lead fuel relative to total load.

Fuel control system for dual fuel engines

A method of combusting natural gas fuel in a two cycle, turbocharged internal combustion engine substantially reduces the production of nitrogen-oxygen emissions. An improved turbocharger design provides increased air charging pressure, produces a controlled lean air/fuel mixture and lowers peak combustion temperatures. A jet cell ignition device ensures uniform, reliable ignition of the lean air/fuel mixture under all operating conditions and the lean air/fuel mixture in turn encourages complete fuel combustion and provides excellent combustion characteristics with methane, ethane and heavier paraffinic hydrocarbon fuels. These structural modifications and adjustment of other operating parameters combine to reduce nitric oxide (NO) and nitrogen dioxide (NO.sub.2) emissions by as much as 75% while effecting only a negligible increase in fuel consumption.

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Mount Vernon, OH, United States of America

Melvin J Helmich