Method and system for the diagnosis of a common - rail - diesel engine

摘要

Disclosed are a method and a system for the diagnosis of a common - rail - diesel engine. The process for the diagnosis of a common - rail - diesel engine may comprise fixing (s180) of a point in time when a pressure of the common - rail a first predetermined pressure is, as a diagnosis - starting time and not - be taken into account (s190) of a state of the common - rail, until the pressure of the common - rail from the first predetermined pressure to a second predetermined pressure has decreased, which a diagnosis - final pressure is, verifying of a point in time, when the pressure of the common - rail of the second predetermined pressure is, and determining (s210) of the point in time than a diagnosis - end point in time, when the pressure of the common - rail of the second predetermined pressure is, calculating (s220) of a diagnosis time duration than an elapsed time starting from the diagnosis - starting time up to the diagnosis - end point in time, and diagnosing (s240), that fuel from the common - rail leaks if the diagnosis time duration is shorter than a predetermined diagnosis time duration is by means of comparing (s230) of the diagnosis time duration with the specified diagnosis time duration.