Patent ID: 8713915
Filing Date: 2014-05-06
Classification: F01N,F02D,G01K,Y02T

Abstract:
1. A catalyst overheat prevention apparatus comprising: an electronic control unit; the electronic control unit configured to estimate a convergence temperature on which a temperature of a catalyst provided in an exhaust system of an internal combustion engine converges; the electronic control unit configured to estimate the temperature of the catalyst; the electroniccontrol unit configured to prevent overheating of the catalyst when the convergence temperature estimated by the electronic control unit and the catalyst temperature estimated by the electronic control unit are equal to or higher than a determination value; and the electronic control unit configured to correct, during execution of the control, the estimated catalyst temperature to be equal to the determination value based on at least one of a result of comparison between the estimated convergence temperature and the estimated catalyst temperature, a result of comparison between the estimated convergence temperature and the determination value, and a result of comparison between the estimated catalyst temperature and the determination value.