Light duty vehicle and light duty truck emission performance warranty; short tests and standards. Technical report

Technical Report · Sat Dec 01 04:00:00 EST 1979

OSTI ID:5204024

This report adresses the relationship between short test emission results and emissions as measured on the 'complete' or certification test (hydrocarbons and carbon monoxide) for 1981 and later model year light duty vehicles and light duty trucks. As provided in section 207(b) of the Clean air Act, EPA must establish an Emissions Performance Warranty if a short test can be developed which is (1) available (2) in accordance with good engineering practice and (3) reasonably capable of being correlated with the Federal Test Procedure (FTP). The purpose of this report is to evaluate the correlation of idle and loaded short test emissions to results which will be obtained on the certification test for 1981 model year and later passenger cars and light trucks. This report addresses the issue of correlation for 1981 and later model year vehicles, Data from 1975-77 model federal cars was examined. Three short tests are recommended: idle, two speed idle and two mode loaded. These short tests are associated standards give approximately the same error of commission rate as the FTP (comparing single test results to average emission levels) while identifying a substantial part of the excess emissions.

• Research Organization: Environmental Protection Agency, Ann Arbor, MI (USA). Inspection and Maintenance Staff
• OSTI ID: 5204024
• Report Number(s): PB-80-125602
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320203 -- Energy Conservation
Consumption
& Utilization-- Transportation-- Land & Roadway
33 ADVANCED PROPULSION SYSTEMS
330700* -- Advanced Propulsion Systems-- Emission Control
AUTOMOBILES
AUTOMOTIVE INDUSTRY
CERTIFICATION
EXHAUST GASES
EXHAUST SYSTEMS
FEDERAL TEST PROCEDURE
GASEOUS WASTES
INDUSTRY
PERFORMANCE
REGULATIONS
STANDARDS
TECHNOLOGY ASSESSMENT
TRUCKS
VEHICLES
WARRANTIES
WASTES