Cummins' new QSF2.8 engine is a 4-cylinder, 2.8-liter unit with 49 to 74 horsepower, designed to meet Tier 4-Final regulations taking effect in 2013.
The QSF2.8 is the smallest engine to be introduced by Cummins for the off-highway industry with full-authority electronic controls driving a High Pressure Common Rail (HPCR) fuel system. This capability brings the premium performance characteristics associated with larger Cummins engines to compact equipment below 75 horsepower for the first time.
Cummins' electronics drive the HPCR system to enable multiple fuel injection events with over 23,000 psi pressure capability, achieving cleaner combustion with improved fuel efficiency, according to the company.
A compact aftertreatment system has been specifically developed by Cummins for Tier 4 applications ideally suited for use in rental equipment. Without the aftertreatment, the same QSF2.8 base engine meets all other emissions requirements, including Tier 3, to provide a single platform for all applications.
The QSF2.8 offers an installation envelope comparable in size and weight with engines smaller than 2.8-liter displacement but combines this with the durability expected from an engine with a larger displacement, Cummins says.