Spring 2027

Exhaust Aftertreatment Systems

Develops the science and engineering underlying the design of exhaust aftertreatment (catalyst) systems for automotive internal combustion engines, with emphasis on gasoline and diesel engines.

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Recorded instructors · Spring 2027 No instructors listed

Summary

What you’ll be able to do

  • Explain the process that drive emissions formation, know what a catalyst is, and be familiar with the ever-changing landscape of regulations.

  • Compare/contrast emissions testing protocols and emissions measurement equipment to be able to choose the ones best suited to their needs

  • Explain the purpose of the Exhaust Aftertreatment System (EAS) and its reliance on On-Board Diagnostics (OBD) for operations and warranty issues

  • Analyze and describe the operations of the Oxidation Catalysts (OCs) and describe the operations of the Three-Way Catalyst (TWC)

  • Analyze and describe the operations of the Particulate Filters

  • Analyze and describe the operations of the Selective Catalytic Reduction (SCR) catalyst and include Ammonia Slip Catalysts

Source: UW Guide

Grade history

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letter grades

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Prerequisites

Course map

Graduate/professional standing

  • Graduate/professional standing
EPD 635

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Prerequisite text tree
  • Graduate/professional standing

Professors

Spring 2027

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Calendar & sections

Spring 2027

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Student experience

the class

Fundamental development of the science and engineering underlying the design of exhaust aftertreatment (catalyst) systems for automotive (internal combustion engine containing) systems. Emphasis is on gasoline and diesel, spark-ignition and compression-ignition combustion engines, though the same fundamentals may be applied to other fuels or combustion types. Introductory material is included on aspects that are related to emissions, including regulatory standards, gasoline and diesel engine basics, fuels, lubricants, combustion, instrumentation, and formation of pollutants. Several causes of emissions and pollutants are intertwined throughout the various topics and the control and treatment of specific emissions species are discussed by device type.

difficulty & workload

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Topics

  • Gasoline and diesel, spark-ignition and compression-ignition combustion engines
  • Emissions regulatory standards, engine basics, fuels, lubricants, combustion, instrumentation, and pollutant formation
  • Control and treatment of specific emissions species by device type

Skills

  • Comparing emissions testing protocols and measurement equipment
  • Analyzing operations of oxidation and three-way catalysts
  • Analyzing operations of particulate filters
  • Analyzing operations of selective catalytic reduction and ammonia slip catalysts

Grades

Instructor

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Sources & history

UW–Madison

Catalog & offerings

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Dataset & model

Recorded 2026-10-14

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Model outputs & technical records
Qwen/Qwen3.8-27B
LLM outputs across runs
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Full model traces

Recorded model configuration, reasoning, and tool conversations.

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Model & dataset provenance 
{
  "model": "Qwen/Qwen3.8-27B",
  "model_revision": "1d4bf0f2ff6012fd82039f2fa52739d0dd7c60c0",
  "task_version": "17",
  "output_id": "2cfa7026e999559e7454b79c4e5d13894bb18303bbabb889cbac07ef1b0f3ff2",
  "requirements_status": "valid",
  "dataset_revision": "fc1811fa52e581ea57a35c0cf3343f8740a8ffbf",
  "observed_at": "2026-10-14 17:50:09.728220+00:00"
}