Vitesco Technologies Gmbh

Thomas Pichler

Thomas Koenig

A method and a device for pressure sensor diagnosis in a tank venting system of a motor vehicle operated by an internal combustion engine is disclosed. The tank venting system includes 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 is arranged in the purge line and a pressure sensor is arranged in the purge line. The method includes measuring a pressure prevailing in the purge line by way 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, and 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 pressure-sensor diagnosis in a tank-venting system of a motor vehicle operated by an internal combustion engine

A method and a device for diagnosing a ventilation line of a motor vehicle are provided. The ventilation line is arranged between a fuel tank and an activated carbon filter. The motor vehicle has a control unit (ECU) and is powered by an internal combustion engine. The state of a vacuum switch is evaluated for the diagnosis.

Method and device for diagnosing a ventilation line of an internal combustion engine fuel tank

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

Various embodiments include a method for controlling a tank ventilation valve connected to an intake tract of a turbocharged internal combustion engine via two flush lines, wherein each of the two flush lines includes a respective check valve including: checking whether the respective check valves are in a toggling range; and if the respective check valves are in the toggling range, at least partially closing the tank ventilation valve.

Method and device for controlling a tank ventilation valve connected via two flush lines to the intake tract of a turbocharged internal combustion engine

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Munich, Germany

Thomas Pichler