[Code of Federal Regulations] [Title 40, Volume 18] [Revised as of July 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR94.105] [Page 600-602] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 94--CONTROL OF EMISSIONS FROM MARINE COMPRESSION-IGNITION ENGINES-- Table of Contents Subpart B--Test Procedures Sec. 94.105 Duty cycles. (a) Overview. For the purpose of determining compliance with the emission standards of Sec. 94.8, except for those in Sec. 94.8(e), engines shall be tested using the appropriate duty cycles described in this section. (b) General cycle. Propulsion engines that are used with (or intended to be used with) fixed-pitch propellers, and any other engines for which the other duty cycles of this section do not apply, shall be tested using the duty cycle described in the following Table B-1: Table B-1--General Marine Duty Cycle ---------------------------------------------------------------------------------------------------------------- Engine speed \1\ Percent of Minimum Mode No. (percent of maximum time in Weighting maximum test power mode factors test speed) \2\ (minutes) ---------------------------------------------------------------------------------------------------------------- 1........................................................... 100 100 5.0 0.20 [[Page 601]] 2........................................................... 91 75 5.0 0.50 3........................................................... 80 50 5.0 0.15 4........................................................... 63 25 5.0 0.15 ---------------------------------------------------------------------------------------------------------------- \1\ Engine speed: 2 percent of point. \2\ Power: 2 percent of engine maximum value. (c) Variable-pitch and electrically coupled propellers. (1) Constant-speed propulsion engines that are used with (or intended to be used with) variable-pitch propellers or with electrically coupled propellers shall be tested using the duty cycle described in the following Table B-2: Table B-2--Duty Cycle for Constant-Speed Propulsion Engines ---------------------------------------------------------------------------------------------------------------- Engine speed \1\ Percent of Minimum Mode No. (percent of maximum time in Weighting maximum test power mode factors test speed) \2\ (minutes) ---------------------------------------------------------------------------------------------------------------- 1........................................................... 100 100 5.0 0.20 2........................................................... 100 75 5.0 0.50 3........................................................... 100 50 5.0 0.15 4........................................................... 100 25 5.0 0.15 ---------------------------------------------------------------------------------------------------------------- \1\ Engine speed: 2 percent of point. \2\ Power: 2 percent of engine maximum value. (2) For the purpose of determining compliance with the emission standards of Sec. 94.8, variable-speed propulsion engines that are used with (or intended to be used with) variable-pitch propellers or with electrically coupled propellers shall be tested using the duty cycle described in Table B-3, which follows: Table B-3--Duty Cycle for Variable Speed Propulsion Engines Used on Non-Propeller Law Vessels and for Variable Speed Auxiliary Engines ---------------------------------------------------------------------------------------------------------------- Percent of Minimum maximum time in Weighting Test segment Mode No. Engine speed \1\ test torque mode factors \2\ (minutes) ---------------------------------------------------------------------------------------------------------------- 1......................... 1 Maximum Test Speed.............. 100 5.0 0.15 1......................... 2 Maximum Test Speed.............. 75 5.0 0.15 1......................... 3 Maximum Test Speed.............. 50 5.0 0.15 1......................... 4 Maximum Test Speed.............. 10 5.0 0.10 2......................... 5 Intermediate.................... 100 5.0 0.10 2......................... 6 Intermediate.................... 75 5.0 0.10 2......................... 7 Intermediate.................... 50 5.0 0.10 2......................... 8 Idle............................ 0 5.0 0.15 ---------------------------------------------------------------------------------------------------------------- \1\ Engine speed (non-idle): 2 percent of point. Engine speed (idle): Within manufacturer's specifications. Idle speed is specified by the manufacturer. \2\ Torque (non-idle): 2 percent of engine maximum value. Torque (idle): minimum fueling rate Load less than 5 percent of peak torque. (d) Auxiliary. For the purpose of determining compliance with the emission standards of Sec. 94.8: (1) Constant speed auxiliary engines shall be tested using the duty cycle described in Table B-4, which follows: [[Page 602]] Table B-4--Duty Cycle for Constant-Speed Auxiliary Engines ---------------------------------------------------------------------------------------------------------------- Percent of Minimum maximum time in Weighting Mode No. Engine speed \1\ test torque mode factors \2\ (minutes) ---------------------------------------------------------------------------------------------------------------- 1............................... Maximum Test Speed..................... 100 5.0 0.05 2............................... Maximum Test Speed..................... 75 5.0 0.25 3............................... Maximum Test Speed..................... 50 5.0 0.30 4............................... Maximum Test Speed..................... 25 5.0 0.30 5............................... Maximum Test Speed..................... 10 5.0 0.10 ---------------------------------------------------------------------------------------------------------------- \1\ Engine speed: 2 percent of point. \2\ Torque: 2 percent of engine maximum value. (2) Variable speed auxiliary engines shall be tested using the duty cycle described in Table B-3 in paragraph (c)(2) of this section. (e) Recreational. For the purpose of determining compliance with the emission standards of Sec. 94.8, recreational engines shall be tested using the duty cycle described in Table B-5, which follows: Table B-5--Recreational Marine Duty Cycle ---------------------------------------------------------------------------------------------------------------- Engine speed\(1)\ Percent of Minimum time Mode No. (percent of maximum test in mode Weighting maximum test power\(2)\ (minutes) factors speed) ---------------------------------------------------------------------------------------------------------------- 1............................................... 100 100 5.0 0.08 2............................................... 91 75 5.0 0.13 3............................................... 80 50 5.0 0.17 4............................................... 63 25 5.0 0.32 5............................................... idle 0 5.0 0.30 ---------------------------------------------------------------------------------------------------------------- \1\ Engine speed: 2 percent of point. \2\ Power: 2 percent of engine maximum value. [64 FR 73331, Dec. 29, 1999, as amended at 67 FR 68343, Nov. 8, 2002]