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C.F.R - Table of Contents

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CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER C—AIR PROGRAMS (Parts 50–99) > PART 90—CONTROL OF EMISSIONS FROM NONROAD SPARK-IGNITION ENGINES AT OR BELOW 19 KILOWATTS > SUBPART E—Gaseous Exhaust Test Procedures (§90.401 to §90.427)

SUBPART E—Gaseous Exhaust Test Procedures (§90.401 to §90.427)

  • 90.401—Applicability.
  • 90.402—Definitions.
  • 90.403—Symbols, acronyms, and abbreviations.
  • 90.404—Test procedure overview.
  • 90.405—Recorded information.
  • 90.406—Engine parameters to be measured and recorded.
  • 90.407—Engine inlet and exhaust systems.
  • 90.408—Pre-test procedures.
  • 90.409—Engine dynamometer test run.
  • 90.410—Engine test cycle.
  • 90.411—Post-test analyzer procedures.
  • 90.412—Data logging.
  • 90.413—Exhaust sample procedure—gaseous components.
  • 90.414—Raw gaseous exhaust sampling and analytical system description.
  • 90.415—Raw gaseous sampling procedures.
  • 90.416—Intake air flow measurement specifications.
  • 90.417—Fuel flow measurement specifications.
  • 90.418—Data evaluation for gaseous emissions.
  • 90.419—Raw emission sampling calculations—gasoline fueled engines.
  • 90.420—CVS concept of exhaust gas sampling system.
  • 90.421—Dilute gaseous exhaust sampling and analytical system description.
  • 90.422—Background sample.
  • 90.423—Exhaust gas analytical system; CVS grab sample.
  • 90.424—Dilute sampling procedures—CVS calibration.
  • 90.425—CVS calibration frequency.
  • 90.426—Dilute emission sampling calculations—gasoline fueled engines.
  • 90.427—Catalyst thermal stress resistance evaluation.




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