The Miller system was implemented to control the intake-air throttle valve for a stationary natural gas engine. The throttle system consists of an additional rotary valve provided with a variable timing device and a conventional butterfly valve. This throttle system can control not only the mass flow rate of the air-fuel mixture by changing the intake duration, but also the effective compression ratio at the same time. The experimental results showed an improvement in thermal efficiency at part load and a reduction of NOx emissions for the gas engine.
The Development of New Throttle Valve Actuation System for Natural Gas Engine
Sae Technical Papers
International Congress & Exposition ; 1992
1992-02-01
Conference paper
English
The development of new throttle valve actuation system for natural gas engine
Automotive engineering | 1992
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