With CONEXPO-CON/AGG 2011 as the stage, Cummins Inc. has been displaying its
broad range of EPA Tier 4 interim and EU Stage IIIB certified engines and
Cummins Tier 4 interim engines are delivering significantly
higher fuel economy and improved engine response than their successful Tier 3
predecessors. This combination of higher performance with cleaner, low
emissions operation has been represented with a Tier 4 “Clear Advantage” message
for visitors to the Cummins booth.
Cummins put on display a full line up of the latest generation 3.3
-15lrs engines, extending from 60 - 600hp (45 - 447kW). On the small end of
the range, the Tier 4 Interim QSB3.3 engine features a new top rating of 120hp
(90kW). The improved power curve will further add to the premium performance
associated with the four-cylinder, 3.3lrs engine and enable enhanced
productivity for compact equipment.
QSB3.3 power increase was made possible due to more efficient combustion
realized by the aftertreatment simplicity of the Cummins Compact Catalyst,
specifically developed to meet EPA Tier 4 interim/EU Stage IIIB emissions. The
catalyst captured the attention of the industry when introduced as a fully
passive and service-free aftertreatment.
The latest generation QSB6.7 engine is
certified to a higher power output of 300hp (224kW), while the QSL9 engine
increases output up to 400hp (298kW). The 6.7lrs and the 9lrs engines have
received EPA and EU emissions certification as integral systems with Cummins
Particulate Filter exhaust Aftertreatment, enabling a unique level of
integration and packaging efficiency.
The 6.7lrs and 9lrs engines, which achieve
up to 5% improved fuel efficiency and
faster engine response, are among the most widely used in the off-highway
industry within their power range. More than 30 power ratings will be available
for Tier 4 interim and Stage IIIB applications, with a wide range of
installation configurations applicable to all types of construction,
agricultural and industrial equipment.
Higher up on the horsepower chart, the
Cummins QSX11.9 and QSX15 Heavy-Duty engines represent a major
leap forward in high-power productivity for construction, agricultural and
mining equipment across the 300 - 600hp (224 - 447kW) range. They are supplied
as fully integrated air-intake-to-exhaust aftertreatment systems to meet 2011
EPA Tier 4 interim and EU Stage IIIB regulations.
Along with its engines, Cummins has displayed
its key system technologies, including the Cummins Particulate
Filter exhaust aftertreatment system and the Direct Flow air cleaner from