PR457-22208-R01 Reduced Cyclic Variability for Improved GHG Emissions

Legacy natural gas engines have made substantial progress over decades of research and development to improve the reliability of operation under loaded, steady-state conditions. The reduction of misfires and preignition cycles has reduced emissions such as unburned hydrocarbons and oxides of nitrogen through various means, including efforts to minimize combustion variability at specific engine operating conditions. Understanding the root causes of cycle-to-cycle variability is vital in determining how to counteract them. By reducing cyclic variability, engine performance improves, emissions are reduced, and service life is extended.

This report investigates mechanical governor control on a single cylinder two-stroke gas engine to determine if it induces some variability in the cycle-to-cycle combustion process.