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This SAE Recommended Practice is applicable to all types of reciprocating engines including two-stroke cycle and free piston engines, and was prepared to facilitate clear understanding and promote uniformity in nomenclature. Modifying adjectives in some cases were omitted for simplicity. However, it is good practice to use adjectives when they add to clarity and understanding.

The purpose of this code is to provide standard test procedures for crankcase emission control systems and/or devices. The procedures included are for determining: 1 The flow rate of the blowby of an engine. 2 The flow rates through the crankcase emission control system inlet and outlet. This code is written to cover crankcase emission control systems which are designed to reduce the emission of engine blowby gases to the atmosphere. The code includes the following sections: 1. Definitions and Terminology 2. Test Equipment 3. Test Procedures 4. Information and Data to be Recorded 5. Data Analysis 6. Presentation of Information and Data

This SAE Recommended Practice establishes equipment and test procedures for determining the performance of spark arrester exhaust systems of multiposition small engines (<19 kW) used in portable applications, including hand-held, hand-guided, and backpack mounted devices. It is not applicable to spark arresters used in vehicles or stationary equipment.

This SAE Recommended Practice establishes uniform laboratory techniques for the continuous and grab sample measurement of various constituents in the exhaust gas of the gasoline engines installed in passenger cars and light trucks. The report concentrates on the measurement of the following components in exhaust gas: hydrocarbons (HC), carbon monoxide (CO), carbon dioxide (CO2), nitric oxide (NO), nitrogen dioxide (NO2), and oxygen (O2). This recommended practice includes the following sections: 1. Introduction 2. Definitions and Terminology 3. Sampling and Instrumentation 4. Associated Test Equipment 5. Test Procedures Appendix—Other Measurement Technology

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