The present invention relates to a method for diagnosing a leak in a fuel tank, comprising: a step of blocking driving of a plurality of injectors after a control portion drives a starter motor; a step of first measurement for measuring a first compression time and a first expansion time which are times required for a compression stroke and an expansion stroke of each of a plurality of cylinders by the control portion after a blocking step; a step of first comparison for comparing the first compression time and the first expansion time of each of the cylinders with a predetermined first target compression time and a first target expansion time by the control portion after the first measurement step; and a step of diagnosis for diagnosing a cylinder as malfunctioning by the control portion when at least one cylinder of the cylinders has the first compression time that is less than the first target compression time and the first expansion time that exceeds the first target expansion time as a result of performing the first comparison step, thereby capable of precisely diagnosing a leak in a cylinder of the cylinders provided in an engine.

    본 발명에 따른 연료탱크의 리크 진단 방법은 제어부가 스타터모터를 구동시킨 후 다수의 인젝터의 구동을 차단하는 단계; 차단단계 후, 제어부가 다수의 실린더들 각각의 압축행정과 팽창행정에 소요되는 시간인 제1압축시간 및 제1팽창시간을 측정하는 제1측정단계; 제1측정단계 후, 제어부가 다수의 실린더들 각각의 제1압축시간 및 제1팽창시간을 기설정된 제1목표압축시간 및 제1목표팽창시간과 비교하는 제1비교단계: 및 제1비교단계 수행결과, 다수의 실린더 중 적어도 하나의 실린더가 제1압축시간이 제1목표압축시간 미만이고 제1팽창시간이 제1목표팽창시간을 초과할 경우, 제어부가 해당 실린더를 고장으로 진단하는 단계;를 포함할 수 있다.


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    Title :

    METHOD FOR DIAGNOSING LEAK OF A FUEL TANK


    Additional title:

    연료탱크의 리크 진단 방법


    Contributors:

    Publication date :

    2017-11-21


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES



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