Cummins used CONEXPO-CON/AGG 2011 to introduce its latest version of
the QSL9 engine, complete with exhaust after-treatment technologies to meet
forthcoming 2014 Tier 4 Final emissions regulations.
The route to emissions nirvana sees the 9liter, six-cylinder engine use
a mix of Cummins compact catalyst and selective catalytic reduction, known as
CCC-SCR, to produce up to 400hp (298kW) without any performance compromises.
Configured to provide a compact and flexible installation solution, the
CCC-SCR package will also be utilized by Cummins’ QSB6.7, QSB4.5 and QSB3.3
engines to offer a common after-treatment solution from 75-400hp (56-298kW)
across the 3.3 to 9liter engine range.
“We listened to equipment manufacturers before developing our Tier 4
Final architecture for the QSB3.3 to QSL9 product line, and the clear message
we heard was to focus on reducing installation complexity as much as possible –
while retaining the high power output and performance offered by our Tier 4
Interim products,” said Jeff Weikert, vice president, Cummins Mid-Range
“Transient response has also been maintained and there is no
maintenance requirement for the particulate filter,” he said. “It’s a