| 摘要 |
Process for testing the functionality of a catalyst used for purifying IC engine exhaust gas during operation of the engine comprises equipping the engine with an electronic on-board diagnostics system; and determining the difference DELTA T of the actual catalyst outlet temperature of the exhaust gas TA to the starting temperature for carbon monoxide TCO,50%, fresh of the fresh catalyst in each engine operating point and acquiring the degree of conversion rCO for carbon monoxide to judge the remaining activity of the catalyst. DELTA T = TA - TCO,50%, fresh. Preferred Features: The degree of conversion rCO for carbon monoxide is determined as: rCO = 1 - (CCO,2/CCO,1) (where, CCO,2 = the measured concentration of carbon monoxide in the exhaust gas after the catalyst; and CCO,1 = the measured concentration of carbon monoxide in the exhaust gas before the catalyst). |
