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A Laboratory for 1975-1976 Vehicle Emission Testing
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English
Abstract
An exhaust emissions laboratory has been established where soak-and-test investigations can be performed in an integrated, climate-controlled setting, in accordance with the 1975 Federal Test Procedure. Catalytic converter designs, catalyst materials, and other emissions-related engine and vehicle components are tested in this laboratory.
The paper discusses the new facility's capacity for making converter modal efficiency measurements, and it provides details on the real-time data processing, as well as on the improved controls of test variability. The laboratory layout is described and illustrated, and information is furnished on data acquisition and reduction, facility calibration, and experience with a servo driver and with materials evaluation vehicles. Both an analog computer and a minicomputer are used in the laboratory, and the printout copy reproduced here includes a real-time modal data sheet, a test summary, and a data repeatability analysis.
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Citation
Brown, A. and Brainard, N., "A Laboratory for 1975-1976 Vehicle Emission Testing," SAE Technical Paper 730531, 1973, https://doi.org/10.4271/730531.Also In
References
- Environmental Protection Agency Federal Register 37 175 Sept. 8 1972
- Holl William H. “Variables for Emission Test Data Analysis.” Paper 730533 SAE National Automobile Meeting Detroit May 1973
- Wiers Ward W. Scheffler Charles E. “Carbon Dioxide (CO 2 ) Tracer Technique for Modal Mass Exhaust Emission Measurement.” Paper 720126 SAE Automotive Engineering Congress Detroit January 1972
- Ayres John Hammel M. Levijoki A. Yu Ruey “A Servo Vehicle Driver for EPA Emissions Tests.” Paper 730532 SAE National Automobile Meeting Detroit May 1973
- Moore M. L. “Assurance and Control of Vehicle Emission Testing.” Paper 730534 SAE National Automobile Meeting Detroit May 1973