Provided is an apparatus for calculating pressure of a fuel tank for a compressed natural gas vehicle, which calculates pressure of a fuel tank in order to measure a level of remaining fuel of the fuel tank of the compressed natural gas vehicle comprising a fuel tank, a regulator valve, a fuel rail, and an injector. The apparatus comprises: an ECU providing an injection flow rate of fuel injected from the injector and a driving rate of the regulator valve; a rail pressure sensor measuring and providing a rail pressure of the fuel rail which distributes the fuel to the injector; and a fuel amount calculation unit calculating a valve flow rate of the regulator valve based on the rail pressure measured by the rail pressure sensor and the injection flow rate provided by the ECU, calculating a primary pressure of the fuel flowing into the regulator valve based on the valve flow rate and the driving rate of the regulator valve provided by the ECU, and calculating the pressure of the fuel tank based on the primary pressure.

    연료탱크, 레귤레이터 밸브, 연료레일, 인젝터를 포함하는 압축천연가스 차량의 연료탱크의 연료 잔량을 측정하기 위하여 상기 연료탱크의 압력을 산출하는 연료탱크 압력 산출장치를 제시하며, 상기 인젝터에서 분사되는 연료의 분사유량 및 상기 레귤레이터 밸브의 구동률을 제공하는 ECU; 상기 인젝터로 연료를 분배하는 연료레일의 레일압력을 측정하여 제공하는 레일압력센서; 및 상기 레일압력센서에서 측정된 상기 레일압력과, 상기 ECU에서 제공된 상기 분사유량을 기반으로 상기 레귤레이터 밸브의 밸브유량을 도출하고, 상기 밸브유량과, 상기 ECU에서 제공된 상기 레귤레이터 밸브의 구동률을 기반으로 상기 레귤레이터 밸브로 유입되는 연료의 1차측 압력을 산출하며, 상기 1차측 압력을 기반으로 상기 연료탱크의 압력을 산출하는 연료량 연산부를 포함한다.


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    Title :

    PRESSURE CALCULATING APPARATUS AND METHOD FOR FUEL TANK OF COMPRESSED NATURAL GAS VEHICLE


    Additional title:

    압축천연가스 차량용 연료탱크 압력 산출장치 및 산출방법


    Contributors:

    Publication date :

    2020-05-25


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / F17C Behälter zum Aufnehmen oder Speichern verdichteter, verflüssigter oder verfestigter Gase , VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES / G01F Messen des Volumens, des Durchflussvolumens, des Massendurchflusses oder des Füllstandes , MEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL



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