SAE Professional Development Resource Guide 2013 - 81

Environment
and the advantages and disadvantages of these emission reduction technologies will be discussed. In this two-day seminar, the primary focus is on urea SCR and its technology will be fully examined. The important chemical reactions and methods for improving SCR performance by encouraging desirable reactions and avoiding undesirable reactions are explained. Additionally, the components and control of a urea SCR system are detailed and the necessary sensors for its control are described. The SAE paper, Laboratory Testing of Urea-SCR Formulations to Meet Tier 2 Bin 5 Emissions, is included in the course materials. • Chemical reactions • Advantages/Disadvantages of the urea SCR system • Notable demonstration

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Learning Objectives
By attending this seminar you will be able to: • Identify how NOx is formed in diesel engines • Identify the in-cylinder means for reducing NOx • Evaluate NOx aftertreatment technologies for diesel exhaust • Describe the characteristic of selectivity in catalytic aftertreatment • Apply selectivity to urea SCR • •Describe the features and components of a complete urea SCR system • Learn how to optimize the control of a urea SCR • Distinguish the differences between various catalytic SCR formulations

Who Should Attend
This seminar will beneﬁt engineers and technical staff who are developing urea aftertreatment systems for diesel engines, including catalyst engineers who supply NOx aftertreatment systems to the diesel industry. Also beneﬁtting will be suppliers of other NOx reducing technologies, such as EGR components and fuel injection systems, as well as on-highway and off-highway diesel engine technical staff.

Prerequisites
Attendees should have knowledge of how a diesel engine operates, including its 4-stroke operation. Additionally, attendees should have basic knowledge of the emission formation mechanism in internal combustion engines.

DAY TWO • Components of the Urea SCR System • Catalyst -- Extruded substrate; Coated substrate • Catalyst Type -- Vanadia/Titania/Tungsten; Iron Zeolite; Copper Zeolite • Catalyst volume and space velocity considerations • Urea injection system -- Air-Assist systems; Airless systems • NOx sensors • Urea speciﬁcations and suppliers • System Calibration and Control Considerations • Effect of NH3/NO • Effect of NO2/NO • Ammonia slip • Exhaust architecture • Regulatory and Market Considerations • Urea Infrastructure -- Bottles; Dispensers; Co-Fueling • End-user and urea reﬁlls • The Japanese experience • The European experience • Plans for USA manufacturers • Commercial vehicle market projections • Urea Production and Distribution • The A.D. Little Report • The European experience • Passenger car diesel emission regulations • Light-Truck diesel emission regulations • SCR Options and Conﬁgurations for Future NOx Limits • On-Highway heavy-duty diesels • Non-Road diesel engines • Passenger car diesels • Light-Truck diesels • Cold weather operation • Closing and Evaluations

Instructor: Magdi Khair
Fee $1305 1.3 CEUs

Topical Outline
DAY ONE • Introduction • On-Highway diesel emission regulations • Non-Road diesel emission regulations • Passenger car diesel emission regulations • Light-Truck diesel emission regulations • EURO IV Regulations • EURO V Regulations • NOx regulations in Japan • Drivers for controlling NOx • NOx Formation in Diesel Engines • Diffusion combustion model • The Zeldovich Mechanism • Pressure/Crank angle diagram • Heat release rate • In-Cylinder Means for NOx Reduction • Injection timing retard • Multiple injections/combustion cycle • Charge air cooling • Exhaust gas recirculation • NOx Aftertreatment Systems for Diesel Engines • Lean NOx Catalysts (LNC), DeNOx Catalysts, HC SCR • Lean NOx Trap (LNT), NOx Adsorber Catalyst (NAC also NAK), and NOx Storage Reduction (NSR) • Selective Catalytic Reduction (SCR) using urea reductant • Derivatives: Ammonium Carbamate, Combination LNT/SCR • Urea SCR Technology

Turbocharging for Fuel Economy and Emissions Webinar
4 Hours I.D.# WB1018

Turbocharging is already a key part of heavy duty diesel engine technology. However, the need to meet emissions regulations is rapidly driving the use of turbo diesel and turbo gasoline engines for passenger vehicles. Turbocharged diesel engines improve the fuel economy of baseline gasoline engine powered passenger vehicles by 30-50%. Turbocharging is critical for diesel engine performance and for emissions control through a well designed exhaust gas recirculation (EGR) system. In gasoline engines, turbocharging enables downsizing which improves fuel economy by 5-20%. This webinar will explore turbocharging for gasoline and diesel (heavy and light duty) engines, including the fundamentals of turbocharging, design features, performance measures, and matching and selection criteria. It will discuss the interaction between turbocharging and engine systems and the impact on performance, fuel economy and

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Instructor-led programs

Online courses

ACTAR approved

Part of a Certiﬁcate Program Curriculum
SAE Professional Development Resource Guide 2013

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