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 (CO

2 ), oxygen (O 2 ), and nitrogen oxides (NO x ). NO x is the sum of nitric oxide (NO) and nitrogen dioxide (NO 2

). A complete procedure for testing vehicles may be found in SAE J1094.

This document includes the following sections:

1

. Scope

2 . References

3 . Emissions Sampling Systems

4 . Emissions Analyzers

5 . Data Analysis

6 . Associated Test Equipment

7 . Test Procedures