Temperature sensor or estimator functioning state diagnosing method for diesel engine, involves calculating difference between temperature delivered by measuring unit and temperature delivered by temperature sensor or estimator

摘要

The method involves measuring temperature delivered by a measuring unit used for measuring the temperature of an inlet air traversing a flow meter. Temperature delivered by a temperature sensor or estimator to be diagnosed is measured. The difference between the temperature delivered by the measuring unit and the temperature delivered by the temperature sensor or estimator is calculated. Independent claims are also included for the following: (1) a flow meter comprising a measuring unit (2) an internal combustion engine comprising an electronic controlling unit.