ALLIED ENGG & SERVICES LTD (DEALER OF CATERPILLAR)

ACERT AN ADVANCED CATERPILLAR TECHNOLOGY

Mar 02 - 08, 2009

CLEAN AIR, CLEAR ADVANTAGES

The development of ACERT Technology began with the search of new ways to reduce diesel engine emissions, but it culminated in a revolutionary engine design that does more than help clean the air. ACERT Technology actually enhances diesel engine performance. Cat engines with ACERT ultimately run cleaner because they burn fuel more precisely and more efficiently - while maintaining engine performance and offering proven reliability with long-term durability. And ACERT offers a key advantage over solutions aimed at meeting only today's emissions standards. ACERT has a clear path to meeting even tougher standards in the future - so it won't become obsolete as emissions regulations tighten.

OFF-ROAD ENGINES WITH ACERT

Around the world Cat engines with ACERT have already logged millions of kilometers in on-highway truck applications. There, they've proven to be both reliable and economically viable - delivering the same long service life with the same maintenance levels as the Cat engines they replaced.

Now, owners of Cat machines are seeing the benefits of ACERT Technology. In the fall of 2004, Caterpillar began producing machines featuring ACERT Technology.

Naturally, off-road Cat engines with ACERT meet the new Stage IIIA emissions reduction standards. They're also positioned to meet the very strict Stage IIIB standards for off-road machine when the time comes (see sidebar).

Simply put, ACERT Technology works for off-road applications today, and it will continue to deliver the power to lead for Cat engine users in the years to come.

HOW ACERT WORKS

A REVOLUTION TROUGH EVOLUTION

To understand what ACERT Technology is, it's helpful to first recognize what it isn't.

* ACERT is not a single, add-on system for reducing emissions.

* Instead, ACERT is a refined combination of technologies, some brand new and some that have seen millions of hours of on-the-job use.

Think of ACERT as a revolution through evolution. For off-road applications, the technology takes advantage of both major discoveries and subtle enhancements in three major "building block" engine technologies.

* Fuel delivery Electronic Control Air management

HOW THE REGULATIONS WORK

The EPA in the United States and the European Union (EU) have passed a series of stringent diesel engine emissions standards. Each organization implemented two separate standards, one for on-highway truck engines, another for off-road use.

The off-road standards have been phasing in over a number of years, gradually reducing the regulated levels of emissions for various sizes of diesel engines. In the EU, they are identified as "Stages" (Stage I to Stage IIIB).

In the US, these phases are identified as "Tiers" (Tier 1 to Tier 4).

Off-road standards are now less stringent than those for on-highway vehicles. Over time, the difference will narrow, and the two sets of standards will eventually converge.

WHAT THE REGULATIONS MEAN

The EPA estimate that, by 2010, Tier 3(Stage IIIA) standards will reduce nitrogen oxide (NOx) emissions from diesel engines by about a millions tons per year - equivalent to taking 35 million passenger cars off the road.

Tier 4 (Stage IIIB) standards are dramatically more stringent, reducing NOx emissions by 90% beyond Tier 3 (Stage IIIA) restrictions - enough so that, in some locations, the exhaust coming out of a Tier 4 (Stage IIIB) engine may have less NOx than the air going in.