Cummins Inc. this week revealed the new QSF2.8 engine with 49- to 74-horsepower output at the Intermat show in Paris. The 4-cylinder, 2.8-liter engine was displayed with a fully passive Cummins Compact Catalyst aftertreatment system, designed to meet U.S. EPA Tier 4 Final and EU Stage IIIB low-emissions 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 fuel system. This capability brings the premium-performance characteristics associated with larger Cummins engines to compact equipment below 75 hp for the first time, the company said.
Cummins electronics drive the HPCR system to enable multiple fuel injection events with over 1,600 bar (23,000 psi) pressure capability, achieving cleaner combustion with improved fuel efficiency. All key engine parameters are constantly monitored and engine performance is optimized according to equipment operating conditions.
The Cummins Compact Catalyst aftertreatment has been specifically developed by Cummins for Tier 4 applications as a maintenance-free, "fit and forget" system suited for use in rental equipment. Without the catalyst, the same QSF2.8 base engine meets all other emissions requirements, including Tier 3 and Stage IIIA, to provide a single, global 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. The QSF2.8 is built with exceptional strength at the heart of the engine, Cummins said, capable of the same peak cylinder pressure as Cummins proven QSB4.5.
“With the advantage of a clean sheet design and utilizing premium technology derived from larger Cummins engines, the QSF2.8 provides a new power capability across the important 49- to 74-horsepower band for compact construction and material handling equipment,” said Hugh Foden, executive director – Cummins Off-Highway Business. “Equipment manufacturers will benefit from the ability of the QSF2.8 to provide a single engine installation for all their worldwide equipment platforms, as it meets Tier 4 Final regulations by simply adding a fully passive, service-free catalyst aftertreatment system.
“While the QSF2.8 provides a small installation envelope, it is also designed to be an exceptionally strong engine. This means higher in-service reliability and more durability than operators or rental companies will have experienced before from an engine of this size, helping to increase the residual value of QSF2.8-powered equipment.”
Cummins Inc. designs, manufactures, distributes and services engines and related technologies, including fuel systems, controls, air handling, filtration, emission solutions and electrical power generation systems.