Operation of internal combustion engine comprises estimating future catalyst temperature from present and past engine parameter values and cooling catalyst if estimated temperature exceeds threshold value

摘要

Operating an internal combustion engine with a catalytic converter comprises determining the values of a set of engine parameters affecting the catalyst temperature, estimating the catalyst temperature at a future time from the parameter values at the present and at least one previous time, and cooling the catalyst if the estimated temperature exceeds a threshold value. An independent claim is also included for an internal combustion engine control device (unspecified) adapted to carry out the above process.