The present disclosure relates to internal combustion engines and its teachings may be applied to methods for leakage diagnosis in a fuel tank system. A method for diagnosing leakage may include: closing a fresh air line and a hydrocarbon/air mixture line connected to the fuel tank; measuring a first pressure change in the fuel tank system over a predefined first time interval; opening the fresh air line; operating the purge air pump until a predefined excess pressure is reached; closing the fresh air line; measuring a second pressure change over a predefined second time interval; and comparing the pressure changes to diagnose a leakage in the fuel tank system.
Leakage Diagnosis In A Fuel Tank System
2017-09-14
Patent
Electronic Resource
English
IPC: | F02M Zuführen von Brennstoff-Luft-Gemischen oder deren Bestandteilen bei Brennkraftmaschinen allgemein , SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen |
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