Meeting 2010 Emissions The Most Fuel Efficient and Reliable Way

How Does SCR Help

Improve Fuel Economy?

How Does SCR

Improve Reliability

and Life Cycle Cost?

The New DD15

Designed with SCR In Mine

A Brief Summary of Why

Detroit Diesel is

Confident in SCR

Evolution of Emission Technologies

It has been common knowledge among North America's engine producers that stricter EPA standards will eventually require tradeoffs among emission levels, fuel economy, and potential components stress. In order to meet the series of step-function emission level reductions that began in 2002, a gradual introduction of technologies, hardware, and operational parameters have been implemented.

TIMELINE OF EPA EMISSIONS REDUCTIONS

AND INDUSTRY TECHNOLOGIES TO MEET THEM

Year of Emissions Reduction

Particulate Matter (PM) g.bhp=hr

NOx g/bhp-hr

Common Technological Changes

1998

0.1

4.0

Electronic parameters & retarding timing

2002/2004

0.1

2.5

Basic EGR

2007*

0.01

1.1

More EGR + DPF

2010

0.01

0.2

SCR with lower EGR rates and running cooler OR more aggressive EGR with greater cooling needs