Several sets of repetitive test data using the 1975 Federal Test Procedure ('75 FTP) have been analyzed to establish the variability of each component measured during each phase of the test.The variability characteristics of four different emission control systems have been discussed and compared. The overall variabilities of the '75 FTP composite values have been assessed at ±6% for hydrocarbons and CO, ±3% for NOx, and ±1% for CO2.The extremely repeatable behavior of the CO2 emissions is utilized to calculate the fuel economy during the test. This calculation is discussed and some fuel economy results from repetitive tests are presented.
Test Variability of Emission and Fuel Economy Measurements Using The 1975 Federal Test Procedure
Sae Technical Papers
International Automobile Engineering and Manufacturing Meeting ; 1974
1974-02-01
Aufsatz (Konferenz)
Englisch
FUEL ECONOMY MEASUREMENT—ROAD TEST PROCEDURE
SAE Technical Papers | 1977
Development of Fuel Economy Test Procedure
Kraftfahrwesen | 1983
|Fuel Economy Measurement Road Test Procedure
SAE Technical Papers | 2023
FUEL ECONOMY MEASUREMENT ROAD TEST PROCEDURE
SAE Technical Papers | 1989
FUEL ECONOMY MEASUREMENT ROAD TEST PROCEDURE
SAE Technical Papers | 1995