A precisely controlled, stabilized internal combustion engine is used to generate exhaust gas with fixed emission composition (HC, CO, NOx, O2, CO2), and exhaust temperature. A two-way valve in the exhaust duct switches this gas into a catalytic converter initially at room temperature. The transient warmup and steady-state conversion efficiencies are printed out along with strip charts of the exhaust gas concentrations out of the converter, and gas temperature into and out of the converter. The transient response is particularly important since vehicle emission is much higher during the first few minutes of the Environmental Protection Agency (EPA) driving schedule. Thus, this test is effective in predicting EPA performance of the converter on a particular converter test vehicle. Actual experimental results correlate very well. The math model for generating the predicted normalized EPA results has been developed.
An Engine Dynamometer System for the Measurement of Converter Performance
Sae Technical Papers
National Automobile Engineering Meeting ; 1973
1973-02-01
Aufsatz (Konferenz)
Englisch
Engineering Index Backfile | 1958
Chrysler's New Engine Performance Dynamometer Facility
SAE Technical Papers | 1981
|Catalytic converter vibration measurement under dynamometer simulated roadloads
Kraftfahrwesen | 2000
|Catalytic Converter Vibration Measurement Under Dynamometer Simulated Roadloads
SAE Technical Papers | 2000
|Extending Dynamometer Performance for Virtual Engine Simulation
SAE Technical Papers | 2005
|