Exhaust Gas Recirculation (EGR) for Diesel Engines

I.D. #

C1214

Duration

2 Days

Meeting the requirements of heavy-duty engine emissions regulations is a challenge for all engine manufacturers. Since the introduction of Exhaust Gas Recirculation (EGR) in medium and heavy-duty diesel engines, these systems have become more sophisticated and tightly integrated with emission control systems.

This 2-day seminar will explore the advantages and disadvantages of EGR and the most effective implementation of various EGR systems. This seminar will begin by defining EGR and why it is used in diesel engines, along with an explanation of the mechanisms by which EGR is able to reduce NOx. This seminar will then move into implementation of EGR systems and examples of these systems on medium and heavy-duty diesel engines. In addition, the impact of EGR on various engine components will be discussed and will include EGR coolers, valves and piping. Finally, a section will be devoted to the comparison between EGR and SCR and their future roles in reducing NOx emissions, as well as their impact on fuel efficiency and CO2 emissions. Emphasized in this comparison is the use of EGR in novel combustion systems and its ability to reduce emissions in-cylinder.

Learning Objectives

By attending this seminar you will be able to:

Define EGR
Recognize the different types of EGR systems used in diesel engines
Evaluate the overall advantages and disadvantages of EGR systems in diesel engines
Identify the impact of EGR on the combustion process
Identify the impact of EGR on NOx and PM emissions
Compare and evaluate EGR and SCR systems as a means to meeting emissions regulations

Who Should Attend

This seminar is designed for engineers and managers working in diesel combustion and emissions control technologies.

Prerequisites

A basic understanding of diesel engine technologies and emissions formation will be beneficial.

Seminar Content

DAY ONE

Fundamentals of Exhaust Gas Recirculation
- Defining EGR
- Purpose of EGR
- How EGR works
- Why EGR is used in diesel engines
Types of EGR Systems and Implementation
- HPL EGR
- LPL EGR
- Combination HPL and LPL
- Venturi-Assisted EGR
- Dedicated EGR
Advantages and Disadvantages
- EGR in general
- HPL EGR
- LPL EGR
Impact of EGR
- On emissions
- On fuel economy
- On engine wear
Opportunities for Unique EGR System Implementations
- Air-Augmented EGR systems
- EGR filtration systems
EGR System Design
- Calculations
- Modeling and Simulation
Controls
- System delay and control
- Model-Based control system
- Optimizing for BSFC
- Optimizing for smoke
- Optimizing for NEDC
- Strategy for hybrid EGR
- Throttle control valve

DAY TWO

Impact of Turbocharging on EGR Performance
EGR Coolers and Mixers
- Installation
- Design
- Effects of EGR
Examples of Production EGR Systems
- Cummins
- Volvo
- Mack
- Detroit Diesel
- Navistar
Issues and Challenges of EGR Implementation
- Primary issues
- Power density
- Component design
- Performance and combustion
- Components
Effect of EGR on Diesel Combustion
- Emissions
- Fuel consumption
- Torque and power
- Temperature
EGR and Selective Catalytic Reduction (SCR) Systems Comparison
- General comparisons
- Future roles in reducing emissions

Instructor(s):

Magdi Khair

Dr. Magdi Khair currently holds the position of Chief Technologist at Watlow, where he is assisting with the introduction of new technologies for the diesel engine industry. Dr. Khair recently retired from the position of Institute Engineer in the Engine, Emissions, and Vehicle Research Division at Southwest Research Institute. He is experienced in the areas of engine testing and exhaust emissions control. His prior experience was with AlliedSignal Automotive Catalyst Company with the development of catalytic aftertreatment for light-duty and heavy-duty diesel engines; Ford New Holland with primary responsibility for the development of the 6.6 and 7.8 liter midrange diesel engines to meet 1991 emissions standards; Bendix Diesel Engine Controls where he led the development of advanced electronically controlled diesel fuel injection systems and also established several cooperative engineering programs with European and North American engine manufacturers; and with Chrysler Corporation where he converted the slant six gasoline engine into an open chamber, pilot injected, and electronically controlled diesel engine, supervised a combustion kinetics project, and participated in the design and development of electronic controls for a passenger car turbine engine. Dr. Khair holds 20 U.S. patents in electronic fuel injection, turbocharging, exhaust gas recirculation, and aftertreatment systems. He has also authored and co-authored numerous SAE and ASME papers. Dr. Khair is the co-author of the Diesel Emissions and their Control a text book marketed by SAE. Dr. Khair received a B.S. in Automotive Engineering from Ain Shams University, an M.S. in Thermodynamics from the University of Birmingham, England, an M.B.A. from Michigan State University, and a PhD in Engineering Management from Warren National University.

Fees:

$1225

SAE Members*:

$980 - $1103

* The appropriate SAE Member discount will be applied through the Registration process. Discounts vary according to level of membership: Elite Member 20%; Premium Member 15%; Classic Member 10%

CEU

1.3