Investigation of Micro Pilot Combustion in a Stationary Gas Engine

摘要

The objective of this program was to obtain 35 percent brake thermal efficiency (BTE) based on tuel higher heating value with NO_x emission levels below 0.7 g/bhp-hr. The demonstration engine was a Superior 1706 rated at 400 hp at 1200 rpm. Three design alternatives were tested: two micro pilot prechamber (MPPC) configurations and one micro pilot open chamber configuration. THe results demonstrated that the micro pilot technology could achieve low emissions and high efficiency, depending on the design and implementations of the technology. One micro pilot prechamber configuration tested met the objectives of the program. The prechamber versions obtained lower NO_x levels than the open chamber version at equivalent efficiency. The data indicated that a better NO_x-BTE trade-off was obtained as the pilot quantity was decreased and as the air-fuel ratio was increased.