APPARATUS, SYSTEM, AND METHOD FOR CATALYST PRESENCE DETECTION

摘要

A system to detect the presence of a catalyst includes a catalyst housing (102), a first temperature sensing device (204), a second temperature sensing device (206), a flow rate measurement device (208), and a processing device (210). The first temperature sensing device measures a first temperature of exhaust gas upstream of the catalyst housing. The second temperature sensing device measures a second temperature of the exhaust gas downstream of the catalyst housing. The processing device estimates an expected time delay between the measured inlet and outlet exhaust gas temperatures corresponding to a system with a catalyst present. The processing device may also determine the presence of a catalyst by comparing the measured second temperature to the measured first temperature and comparing the measured second temperature to an estimated delayed first temperature associated with the expected time delay.