The photos show automobile engines being tested for nitrous oxide emissions, as required by the Environmental Protection Agency (EPA), at the Research and Engineering Division of Ford Motor Company, Dearborn. Michigan. NASA technical information helped the company develop a means of calculating emissions test results. Nitrous oxide emission readings vary with relative humidity in the test facility. EPA uses a standard humidity measurement, but the agency allows manufacturers to test under different humidity conditions, then apply a correction factor to adjust the results to the EPA standard. NASA's Dryden Flight Research Center developed analytic equations which provide a simple, computer-programmable method of correcting for humidity variations. A Ford engineer read a NASA Tech Brief describing the Dryden development and requested more detailed information in the form of a technical support package, which NASA routinely supplies to industry on request. Ford's Emissions Test Laboratory now uses the Dryden equations for humidity-adjusted emissions data reported to EPA.
Auto Emission Testing
1979-02-01
Miscellaneous
No indication
English
TIBKAT | 1974
Ford Auto/Emission Driver System
SAE Technical Papers | 1974
|Ford Auto/Emission Driver System
Automotive engineering | 1974
|Targets of auto emission reduction
Automotive engineering | 1990
Auto Crash Testing to the Public
Automotive engineering | 1982
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