U.S. Coast Guard Pollution Abatement Program: Icebreaker Smoke Reduction.

摘要

Laboratory tests on an icebreaker configured FM38D8 1/8 engine have identified methods to reduce excessive smoke emissions without compromising gaseous emissions or fuel economy. Engine test conditions included: (1) A test cycle typical of icebreaker operation; (2) Constant speed, variable load; (3) Constant load, variable speed. Baseline and modified engine tests of smoke, fuel consumption, and gaseous emissions including carbon monoxide, carbon dioxide, total hydrocarbons, oxides of nitrogen and oxygen were conducted. The techniques identified to lower smoke emissions were engine component modifications and operational procedural changes. The former included different style injector nozzles, shimmed injection pumps and improved injection pump tappet to cylinder block seals. The latter included increased engine keep-warm temperatures and minimization of engine idle warm-up times. The conclusions reached in this laboratory study are used to recommend the elements of a field test program and cost-effective methods to reduce Icebreaker smoke. (Author)