Method for testing function of temperature sensor that is arranged along exhaust gas system of internal-combustion engine of motor vehicle, involves determining heat deviation from difference between reference signal value and signal value

摘要

The method involves determining reference signal value from a signal value of a temperature sensor (7) by a thermodynamic model (10), where the thermodynamic model simulates an exhaust gas aftertreatment unit (3) of an exhaust gas system (2). The reference signal value is compared with another signal value of another temperature sensor (8). A heat deviation is determined from difference between the reference signal value and the latter signal value.