Catalyst deterioration detection device, catalyst deterioration detection system, data analysis device, internal combustion engine control device, and used car status information provision method

摘要

PROBLEM TO BE SOLVED: To provide a catalyst deterioration detecting device capable of reducing the cumulative amount of deviation of a component of a fluid flowing into a catalyst with respect to a component suitable for purification of the catalyst. The mapping data 76a stored in the storage device 76 is a variable indicating the degree of deterioration of the upstream side catalyst 32 by inputting time series data of variables corresponding to the upstream side air fuel ratio Afu and the downstream side air fuel ratio Afd. This is data that defines a neural network that outputs a certain deterioration degree variable. The CPU 72 calculates the deterioration degree variable of the upstream catalyst 32 by inputting the time series data of the variables corresponding to the upstream air-fuel ratio Afu and the downstream air-fuel ratio Afd into the mapping defined by the mapping data 76a. [Selection diagram] Fig. 1