Procedure for fault detection of a cooling system of an automobile engine

摘要

Procedure for fault detection of a cooling system of an automobile engine (1), wherein a thermostat valve (3) regulated by opening or closing the temperature in the circuit of cooling water and a sensor temperature (4) detects the actual temperature of cooling water, and a computer (7) calculated using an algorithm based on the values ​​of the actual temperature a first strip temperature model and through comparison with the actual temperature performs fault detection, wherein the computer (7) also calculates for the second temperature, according to a valve defective thermostat, the bypass valve is open, a second strip temperature model for water temperature cooling, that the computer (7) compares the actual temperature development also with the second strip temperature model and that the computer (7) determines, in part ir comparison result with the first and the second strip temperature model, if there is a defect of the temperature sensor (4) or a defect of the thermostat valve (3).