Electrovalve's i.e. exhaust gas recirculation valve, state diagnosing method for diesel engine of motor vehicle, involves evaluating difference between reference intensity and electrical current intensity of electrovalve

摘要

The method involves evaluating the difference between an effective position of an electrovalve and a controlled open/closed position. The difference between the reference intensity and the electrovalve's electrical current intensity measured in the opening position of the electrovalve is evaluated. The electrovalve is considered as defect, when the position difference and the intensity difference are greater than threshold values.