Since 2014 MAN offers a wide range of yacht engines for compliance with the EPA Tier 3 emission standard for the USA. With the low-emission MAN engines, ship builders and owners continue to meet the statutory requirements of the US Environmental Protection Agency. This is even achieved without any increase in fuel consumption under full load relative to the less stringent EPA Tier 2 emission standard.
V-engines and in-line six-cylinder engines available
The range of outputs delivered by MAN's efficient EPA Tier 3 compliant yacht engines extends from 537 kW to 1,324 kW (730 HP to 1,800 HP) and includes all latest generation V8 and V12 engines as well as the in-line six-cylinder engine. Specifically, this relates to the following: R6-730, R6-800, V8-1000, V8-1200, V12-1400, V12-1550, V12-1650, V12-1800.
EPA 3 engines retain compact design
Relative to EPA Tier 2, the EPA Tier 3 emission standard that comes into effect on January 1, 2014, calls for a 20 percent reduction in nitrogen oxides (NOx) and hydrocarbons (HC) to 5.8 g/kWh, and a 40 percent reduction in particulate emissions to 0.12 g/kWh for the range of outputs covered by MAN yacht engines.
Exhaust-gas standard compliance achieved engine internally
MAN yacht engines do not require external exhaust-gas after-treatment systems to comply with the EPA Tier 3 limits. MAN engineers fulfill the more stringent regulations using engine-internal measures alone. Developers fell back neither on exhaust-gas recirculation nor on exhaust-gas aftertreatment.
Fuel consumption remains impressive
Fuel consumptions at rated power have remained constant over the predecessor engines. The efficient MAN engines for yachts and pleasure craft thus continue to be outstanding for their economical consumption and compact installation space, giving architects and boat builders great design leeways.