Micropilot tests progress, durability an issue

Retrofit diesel pilot ignition (DPI), or micropilot, systems installed on natural gas pipeline compressor engines can deliver efficiency and emissions improvements when compared to spark ignition systems.This article examines the design, installation, and testing of a 10-cylinder DPI prototype at an operating compressor station.The engine operated more stably with fewer misfires and partial combustion events than spark-ignition. But injector fouling may have degraded performance assessment, and the performance benefits may be understated. Despite custom injector cooling adaptors, the micropilot injectors failed the durability test.System descriptionThe US pipeline industry uses about 8,00...

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