On-Road Heavy-Duty and Off-Road Compression Ignition Certification Programs: 2015 Family Naming Conventions

CD-15-19: Consolidation of EPA Standardized Naming Conventions for Engine Family, Test Group, Evaporative/Refueling Family, Permeation Family, Emission Family, and Durability Group

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On-Road Heavy-Duty Certification Program, Off-Road Compression-Ignition Certification Program
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The purpose of this letter is to consolidate several previous EPA communications regarding family group naming conventions. A complete description of all 12 characters of Engine Family, Test Group, Evaporative/Refueling Family, Permeation Family, Emission Family, and Durability Group names for all industries is included with this letter for your reference. 

Documents

2015 Family Naming Convention
ADA__CONSOLIDATION OF EPA STANDARDIZED NAMING CONVENTIONS FOR ENGINE FAMILY, TEST GROUP, EVAPORATIVE_REFUELING FAMILY, PERMEATION FAMILY, EMISSION FAMILY, AND DURABILITY GROUP.PDF · 332 KB

Related Resources

On-Road Heavy-Duty and Off-Road Compression Ignition Certification Programs: Engine Certification Workshop - Durability And Deterioration Factors - 2020
Off-Road Compression-Ignition Certification Program: Guidance on Reporting Maximum Allowable Off-cycle Emissions
Off-Road Compression-Ignition Certification Program: California Exhaust Emission Standards and Test Procedures for New 2011 and Later Tier 4 Off-Road Compression-Ignition Engines (Part I – F)