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    Method and device for operating a fuel evaporation retention system of an internal combustion engine
    1.
    发明授权
    Method and device for operating a fuel evaporation retention system of an internal combustion engine 有权

    公开(公告)号：US11725610B2

    公开(公告)日：2023-08-15

    申请号：US17629064

    申请日：2020-07-22

    Applicant: Vitesco Technologies GmbH

    Inventor： Thomas Pichler

    IPC: F02M25/08

    CPC classification number: F02M25/0809 ,  F02M25/0836 ,  F02M25/0854

    Abstract: Various embodiments include a method for operating a fuel evaporation retention system of a vehicle with an internal combustion engine. It includes measuring a pressure change resulting from a temperature change of a gas volume in the fuel tank over a defined period of time while the vehicle is at a standstill after the engine controller has been switched off and comparing an expected pressure profile based on a given temperature profile based at least in part on the tank fill level and after the engine controller has been switched on to an actual measured pressure profile from a previous vehicle standstill phase. If the measured pressure profile lies within a settable tolerance around the expected pressure profile, the method confirms a leak-tight fuel tank. If the measured pressure profile lies outside the settable tolerance, the method identifies a faulty fuel tank and displaying an alert.

    Method and Device for Operating a Fuel Evaporation Retention System of an Internal Combustion Engine
    3.
    发明申请
    Method and Device for Operating a Fuel Evaporation Retention System of an Internal Combustion Engine 有权

    公开(公告)号：US20220275775A1

    公开(公告)日：2022-09-01

    申请号：US17629064

    申请日：2020-07-22

    Applicant: Vitesco Technologies GmbH

    Inventor： Thomas Pichler

    IPC: F02M25/08

    Abstract: Various embodiments include a method for operating a fuel evaporation retention system of a vehicle with an internal combustion engine. It includes measuring a pressure change resulting from a temperature change of a gas volume in the fuel tank over a defined period of time while the vehicle is at a standstill after the engine controller has been switched off and comparing an expected pressure profile based on a given temperature profile based at least in part on the tank fill level and after the engine controller has been switched on to an actual measured pressure profile from a previous vehicle standstill phase. If the measured pressure profile lies within a settable tolerance around the expected pressure profile, the method confirms a leak-tight fuel tank. If the measured pressure profile lies outside the settable tolerance, the method identifies a faulty fuel tank and displaying an alert.

    Method And Device For Pressure-Sensor Diagnosis In A Tank-Venting System Of A Motor Vehicle Operated By An Internal Combustion Engine
    6.
    发明公开
    Method And Device For Pressure-Sensor Diagnosis In A Tank-Venting System Of A Motor Vehicle Operated By An Internal Combustion Engine 审中-公开

    公开(公告)号：US20230375429A1

    公开(公告)日：2023-11-23

    申请号：US18359049

    申请日：2023-07-26

    Applicant: Vitesco Technologies GmbH

    Inventor： Thomas Pichler

    IPC: G01L27/00 ,  F02M25/08

    CPC classification number: G01L27/007 ,  F02M25/0854 ,  F02M25/0872 ,  F02M25/0809

    Abstract: The invention relates to a method and a device for pressure sensor diagnosis in a tank venting system of a motor vehicle operated by an internal combustion engine, wherein the tank venting system comprises an activated carbon filter, a purge line arranged between the activated carbon filter and an intake tract of the motor vehicle, a tank venting valve arranged in the purge line and a pressure sensor arranged in the purge line, and wherein the method comprises the following steps:



    measuring a pressure prevailing in the purge line by means of the pressure sensor to determine a starting pressure,
    classifying the starting pressure into one of a plurality of pressure ranges depending on the amplitude of the starting pressure,
    carrying out a pressure sensor diagnosis using a diagnosis algorithm which is associated with the pressure range in which the starting pressure lies.

    Method And Device For Diagnosing The Tank Ventilation System Purge Line Path Of A Combustion-Engine-Powered Motor Vehicle
    7.
    发明公开
    Method And Device For Diagnosing The Tank Ventilation System Purge Line Path Of A Combustion-Engine-Powered Motor Vehicle 审中-公开

    公开(公告)号：US20230250779A1

    公开(公告)日：2023-08-10

    申请号：US18300910

    申请日：2023-04-14

    Applicant: Vitesco Technologies GmbH

    Inventor： Thomas Pichler ,  Thomas Koenig ,  Dirk Jürgensen

    IPC: F02M25/08

    CPC classification number: F02M25/0809 ,  F02M25/0836 ,  F02M25/089

    Abstract: A method for diagnosing a purge line path of a tank ventilation system of a motor vehicle operated by an internal combustion engine is provided. The purge line path extends between a fuel vapor retention filter and an intake manifold of the motor vehicle, and includes a tank ventilation valve, a pressure sensor, a purge line path region arranged upstream of the pressure sensor, a purge line path region arranged downstream of the pressure sensor, a full load purge path arranged between the tank ventilation valve and the intake manifold, and a part load purge path arranged between the tank ventilation valve and the intake manifold. A plurality of part diagnoses are carried out temporally one after another for diagnosing the purge line path in the case of an active tank ventilation function, and pressure signals measured by the pressure sensor are evaluated within the context of the part diagnoses.

    Method And Device For Diagnosing A Leak In An Evaporation System And In A Tank Ventilation Line Of An Internal Combustion Engine
    8.
    发明公开
    Method And Device For Diagnosing A Leak In An Evaporation System And In A Tank Ventilation Line Of An Internal Combustion Engine 审中-公开

    公开(公告)号：US20230151780A1

    公开(公告)日：2023-05-18

    申请号：US18156754

    申请日：2023-01-19

    Applicant: Vitesco Technologies GmbH

    Inventor： Thomas Pichler ,  Tobias Hirthammer ,  Thomas Koenig

    IPC: F02M25/08

    CPC classification number: F02M25/0818 ,  F02M25/0836

    Abstract: A method and device for diagnosing a leak in an evaporation system and in a tank ventilation line of an internal combustion engine is disclosed. The method includes diagnosing the entire evaporation system using a fresh-air shut-off valve of the evaporation system and a pressure sensor system of the evaporation system. During the check on whether there is a leak in the evaporation system of the internal combustion engine, a separate check of different diagnosis regions of the evaporation system is undertaken, where one of these diagnosis regions is a tank region of the internal combustion engine and a further diagnosis region is a filter region of the internal combustion engine. During the diagnosis of the tank ventilation line, the flow through the tank ventilation line is checked.

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