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General Motors Environmental Chamber For Vehicle Emission Testing
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Abstract
General Motors has built an environmental chamber at its Milford Proving Ground to run emission tests at controlled atmospheric conditions. This chamber was designed using constant speed fans and dampers to simulate altitudes between sea level and Denver, which is approximately 5000 ft above sea level. The chamber can also control temperatures within a range of 45-100°F at humidities of 9-100 gr H2O/lb dry air.
With this chamber, environmental conditions can be changed to desired levels very quickly to measure the vehicle sensitivity to the change. It is also possible to hold the environment constant and run controlled comparison studies on emission-related components to determine the effect of different distributors, carburetors, etc., relative to emission values.
Past test experience has proved that vehicle emissions change with changing environment. However, the degree of change is different from one vehicle to another.
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Citation
Tysver, J., "General Motors Environmental Chamber For Vehicle Emission Testing," SAE Technical Paper 741003, 1974, https://doi.org/10.4271/741003.Also In
References
- Manos M. J. Bozek J. W. Huls T. A. “Effect of Laboratory Ambient Conditions on Exhaust Emissions.” Paper 720124 SAE Automotive Engineering Congress Detroit January 1972
- Wiers Ward W. Scheffler Charles E. “Carbon Dioxide Tracer Technique for Model Mass Exhaust Emission Measurement.” SAE Transactions 81 1972 Paper 720126