SAE J254_198408

This SAE Recommended Practice establishes uniform laboratory techniques for the continuous and bag-sample measurement of various constituents in the exhaust gas of the gasoline engines installed in passenger cars and light-duty trucks. The report concentrates on the measurement of the following components in exhaust gas: hydrocarbons (HC), carbon monoxide (CO), carbon dioxide (CO2), oxygen (O2), and nitrogen oxides (NOx). NOx is the sum of nitric oxide (NO) and nitrogen dioxide (NO2). Historical techniques still used for some purposes are included in the Appendices. A complete procedure for testing vehicles may be found in SAE Recommended Practice J1094, Constant Volume Sampler System for Exhaust Emissions Measurement.This recommended practice includes the following sections:(1)Introduction(2)Definitions and Terminology(3)Emissions Sampling Systems(4)Emissions Analyzers(5)Data Analysis and Reduction(6)Associated Test Equipment(7)Test Procedures(8)Appendices A, B, and C