GE announces Tier 3 / Tier 4i marine engines without exhaust aftertreatment

10 December 2012

At the International WorkBoat Show in New Orleans, GE Marine announced its timeline for meeting US EPA Tier 3 and Tier 4i, as well as IMO Tier III emission compliance for its L250 and V250 marine diesel engines. The marine engines will meet the respective emission standards without the need for exhaust gas aftertreatment, such as selective catalytic reduction (SCR). The new engines will be available in mid-2013, months before the January 1, 2014, deadline for EPA Tier 3 emissions standard compliance.

The non-SCR engine technology is based on the technological advancements of the L250 and V250 engines and requires no supplemental equipment or fluids, said GE. Depending on duty cycle and application, the L250 engines have greater than 5% improved fuel consumption compared to Tier 2 engines, as well as improved torque characteristics and load response rate. In their announcement, GE did not comment which specific in-cylinder emission control technologies will be used in the new engines.

GE’s L250 engines rated at less than 2,000 kW will be certified as EPA Tier 2 during 2013 but will meet EPA Tier 3 emission levels, said GE. The 8L250 and 12/16V250 engines rated at more than 2,000 kW will meet EPA Tier 4i requirements in 2014.

Source: GE Marine