2010 Sustainability Report - Cummins.com

Environmental Stewardship
At Cummins, our Company models good environmental stewardship through our
products, our practices and our partnerships. Here’s a summary of our activity in
all three areas. A more in-depth presentation is available at www.cummins.com.
Products
Cummins’ leadership in combustion research, fuel
systems, air-handling systems, electronics, filtration
and aftertreatment allows the Company to maximize
customer value by providing the most appropriate
emissions control for each market Cummins serves.
The Company’s diverse product portfolio meets
or exceeds all emissions requirements, and at the
same time delivers on our customers’ needs for fuel
economy, performance, reliability and durability.
Engines
Since the 1970s, Cummins on-highway engines have
been regulated by the U.S. EPA and similar regulatory
agencies around the world for combustion emissions,
including Nitrogen Oxide (NOx) Carbon Monoxide
(CO), Hydrocarbons (HC) and Particulate Matter (PM),
also known as soot.
When compared to emissions from unregulated engines
in the early 1970s, today’s on-highway diesel engines
emit 99 percent less PM and NOx.
Off-highway engines produced by Cummins are
also subject to stringent emission standards.
The combustion process for off-highway engines is
fundamentally the same as for on-highway engines.
Between 1995 and 2006, off-highway engine
emissions for NOx and PM have been reduced by
80 percent and 85 percent, respectively. And from
2011 to 2014, off-highway engines will be held to
essentially the same level of emissions as their
on-highway engine counterparts.
2010 EPA emissions and fuel rules
In 2010, all heavy-duty diesel engines had to meet the
NOx standard of 0.20 grams per brake-horsepower
hour (g/bhp-hr) and the PM standard of 0.01g/bhp-hr.
Both NOx and PM were reduced by 90 percent from
2004 levels. The 2010 regulations required the phasein
of advanced on-board diagnostics with additional
sensors to monitor the effectiveness of emission-control
systems on the engine, which alert the driver if a failed
emission-reduction device needs to be repaired.
In addition to the new exhaust emission standards,
the EPA lowered the limit for diesel sulfur fuel from
500 parts per million (ppm) to 15 ppm. The new fuel
standard began to be phased in October 2006 and
will be completed by September 1, 2010.
Cummins was among the first companies to meet
these standards. For 2010, the Company introduced
the ISX15, providing five percent greater fuel economy,
stronger performance, faster throttle response and
overall best-in-class drivability and reliability compared
to our previous industry leading ISX engine.
The ISX15 features the Cummins XPI fuel system,
next generation cooled Exhaust Gas Recirculation
(EGR) system, an advanced turbocharger and a new
Cummins Aftertreatment System that incorporates
Selective Catalytic Reduction (SCR) catalyst technology.
Cummins also introduced the new ISX11.9 for
commercial trucks, emergency vehicles and
motor coach applications.
22 Cummins Inc. Sustainability Report 2010