Test Procedure for the Measurement of Gaseous Exhaust Emissions from Small Utility Engines
- Ground Vehicle Standard
This SAE Recommended Practice specifies a uniform procedure for the evaluation of gaseous exhaust emissions from small utility engines typically less than 20 kW. Details of engine test setup and exhaust gas analysis techniques are specified with the intent of providing a uniform and reproducible method of measurement.
The intent has been to allow as much flexibility as possible in the physical construction of the experimental apparatus. Therefore, only those portions of the apparatus whose operation is critical to the accurate measurement of emissions levels are prescribed in detail.
An engine test procedure including a test sequence is outlined such that it would cover the various applications in which small engines are used. The intent is to provide an understanding of the levels of exhaust emissions and does not imply that in given application, an engine would operate in all the modes outlined in the test procedure.
This document is intended as a guide toward standard practice and is subject to change to keep pace with experience and technical advances.
Data Sets - Support Documents
The Small Engine and Powered Equipment Committee is part of the Specialized Vehicle and Equipment Council. The committee is responsible for preparing, reviewing and updating SAE Standards, Recommended Practices and Information Reports that enhance the performance, efficiency, safety, and service of small engines and equipment powered by small engines. Engineering standards activities enable the design, development, application and testing of small engines, equipment, and related components. The committee is actively updating existing documents as well as developing new standards. Small engines are generally defined by the following criteria: 1. Less than 1.0 liter (61 cu. in.) total displacement and 2. Less than 30 Kw (40 hp) power output. The limits established above are not rigidly prescribed, since larger engines may legitimately fall within the committee scope where there is family similarity or other design characteristics in common with engines falling within the above designated limits. Participants in the SAE Small Engine and Powered Equipment Committee include suppliers, consulting firms, government and other interested parties.