Accession Number:

ADA046241

Title:

Field Tests of In-Service Modifications to Improve Performance of an Icebreaker Main Diesel Engine.

Descriptive Note:

Final rept. Nov 75-Aug 76,

Corporate Author:

COLT INDUSTRIES BELOIT WI FAIRBANKS MORSE ENGINE DIV

Personal Author(s):

Report Date:

1977-08-01

Pagination or Media Count:

109.0

Abstract:

Field tests of in-service modifications to improve engine efficiency and lower the emissions were performed on the no. 3 main diesel engine of the USCGC Mackinaw WAGB-83. This engine is a model 38D8-18 manufactured by Colt Industries, Fairbanks Morse Engine Division, and is rated for 2000 hp at 810 rpm. Baseline and modified engine tests were performed while the ship engaged in routine maneuvers of engine start, warm-up, docking, undocking and steady-steaming. The measurements performed included fuel consumption, smoke carbon monoxide CO, carbon dioxide CO2, oxides of nitrogen NOx, total hydrocarbons THC, oxygen O2, engine speed and load, as well as important engine temperatures and pressures. The engine modifications were newer style pintle type fuel injector nozzles, shimmed injection pumps and advanced injection timing. These modifications decreased fuel consumption 1 to 3 depending on speed and load, reduced CO and THC up to 43 and 88 respectively and increased NOx up to 38. Smoke emissions decreased 50 at low-load engine conditions and 5 at high-loads.

Subject Categories:

  • Marine Engineering
  • Reciprocating and Rotating Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE