Scania ratings
Power definitions
The marine engines have different power ratings depending on the type of service in which the engine will be employed. Our experience is that most of the power requirements are covered by ICFN, IFN and Patrol craft for marine all-speed engines and PRP for marine auxiliary engines.
Marine all-speed engines
The marine all-speed engines all have a “Flat power curve “, i.e. they deliver full power over a wide speed range and provide extra power for acceleration and effortless planing at lower speeds. The wider speed range may also allow re-powering without exchanging the existing transmission.
ICFN, Continuous service
Rated power available 1 h/1 h. Unlimited h/year service time at a total load factor of 100%. Power test code: ISO 3046, Continuous power, Fuel stop power, Net power. (Dependent auxiliaries per ISO 3046 not accounted for. Presence or absence of equipment which affects the final shaft output of the engine, alternator etc., see ISO 3046-1, 3.1.1)
IFN, Intermittent service
Intended for intermittent use where rated power is available 1 hour/3 hours period. Accumulated load factor must not exceed 80% of rated power. Unlimited h/year service time. Total service time depends on load factor.
Patrol craft long
Intended for intermittent use where rated power is available 1 hour/6 hours period. Between full load operations engine rpm must be reduced at least 10% from max. obtained rpm. Accumulated total service time max. 2000 h/year.
Patrol craft short
Intended for intermittent use where rated power is available 1 hour/12 hours period. Between full load operations engine rpm must be reduced at least 10% from max. obtained rpm. Accumulated total service time max. 1200 h/year.
Power test code: ISO 3046, Fuel stop power, Net power.
(Dependent auxiliaries per ISO 3046 not accounted for. Presence or absence of equipment which affects the final
shaft output of the engine, alternator etc., see ISO 3046-1, 3.1.1)