Method for evaluating operability of magnetic valve utilized for e.g. dosing fuel for combustion in combustion engine of motor car, involves comparing magnitude representing detected current flow with magnitude representing defect flow

摘要

The method involves moving a valve needle by an electromagnet. Current flow via the magnet is detected during actuation of a magnetic valve utilized as injectors (18). Magnitude representing the detected current flow is compared with magnitude representing reference current flow, and with magnitude representing defect current flow, where the reference flow corresponds to current flow via the magnet of a functionable magnetic valve, and the defect flow corresponds to current flow via the magnet of a non-functional valve. An operability of the valve is evaluated based on the comparison. The comparison is implemented by using a Hopfield neural network. An independent claim is also included for a computing unit.