CAT®

ENGINES WITH

ACERT®

TECHNOLOGY

Off-Road

Tier 3 / Stage IIIa

Compliance

Caterpillar Innovations

Caterpillar Innovations

Caterpillar Innovations

EPA and European Union

Emissions Restricted

by EPA Standards

• Carbon Monoxide (CO)

• Hydrocarbons (HC)

• Non-Methane

Hydrocarbons (NMHC)

• Particulate Matter (PM)

• Oxides of Nitrogen

(NOx)

2005 Tier 3 / Stage IIIa

1 Million Less Tons NOx

by 2010

2005 Tier 3 / Stage IIIa

Equal to 35 Million Passenger Cars

Tier 4 / Stage IIIb

Tier 2

Stage II

Tier 3

Stage IIIa

Tier 4

Stage IIIb

90% • Beyond Tier 3

Field Testing

Off-Road

Field Testing with

Customers and Dealers

DEVELOPMENT

Developing ACERT

With One Goal in Mind

Possible Solutions

• Cooled EGR

• Non-Cooled EGR

With Compromises

EXHAUST GAS

RECIRCULATION – EGR

Cooled-EGR

Variable Geometry Turbo-Charger

EGR Cooler

EGR VALVE

2002 On-Highway Launch

Bulldozer Technology?

On-Highway Solution?

Engine Technology

Adaptable

Engine Technology

Comprehensive

Building Blocks

Core Concept

Advanced Combustion

Advanced Combustion

Electronics

Proven, Reliable

Electronics

Proven, Reliable

Fuel Delivery

Extremely Accurate

Fuel Delivery

Extremely Accurate

Fuel Delivery

Precisely Timed and Controlled

Air Management

Air Management

Proven Technologies

Air Management

Variable Valve Actuation

Adjust for Engine Load and Speed

Series Turbocharging

Improves Reliability, Extends Life

Series Turbocharging

Improves Reliability, Extends Life

Series Turbocharging

Wastegate Turbocharging

Smaller and Midsize Truck Engines

Wastegate Turbocharging

Smaller and Midsize Truck Engines

Aftertreatment

Aftertreatment

Residual Emissions CO2 + H20

Future Technology

Multiple Injection

HEUI

For Smaller Engines

MEUI

For Larger Engines

ACERT TECHNOLOGY

ACERT Technology

Enhances Combustion

ACERT Technology

Long Engine Life

Challenges Ahead

As We Move to Tier 4 / Stage IIIb

Flexible, Adaptable

Innovative, Effective