Appendix II to Part 1045 - Duty Cycles for Propulsion Marine Engines


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  • Appendix II to Part 1045 - Duty Cycles for Propulsion Marine Engines

    (a) The following duty cycle applies for discrete-mode testing:

    E4 Mode No. Engine
    speed1
    Torque
    (percent)2
    Weighting
    factors
    1 Maximum test speed 100 0.06
    2 80% 71.6 0.14
    3 60% 46.5 0.15
    4 40% 25.3 0.25
    5 Warm idle 0 0.40

    (b) The following duty cycle applies for ramped-modal testing:

    RMC Mode Time in mode
    (seconds)
    Engine speed1 2 Torque (percent)2 3
    1a Steady-state 225 Idle 0
    1b Transition 20 Linear transition Linear transition
    2a Steady-state 63 Maximum test speed 100
    2b Transition 20 Linear transition Linear transition
    *3a Steady-state 271 40% 25.3%
    3b Transition 20 Linear transition Linear transition
    4a Steady-state 151 80% 71.6%
    4b Transition 20 Linear transition Linear transition
    5a Steady-state 161 60% 46.5%
    5b Transition 20 Linear transition Linear transition
    6 Steady-state 229 Warm idle 0