Patent ID: 6250145
Filing Date: 2001-06-26
Classification: F02B

Abstract:
A method for operationally testing an exhaust gas turbocharger having a variable turbine geometry for adjusting an effective turbine cross-section, in which actual values of operating quantities influencing operation of the exhaust gas turbocharger are detected, which values comprise main quantities used for deciding whether a fault is present in the exhaust gas turbocharger, as well as auxiliary quantities describing a component of the exhaust gas turbocharger and used for identifying the fault of the component, the method comprising the acts of:first measuring a quantity determining an engine air supply as a main quantity in order to detect the fault; andsecondly, measuring at least one auxiliary quantity if a fault is detected to identify the fault; andgenerating a fault signal in an event of an unacceptable deviation of an actually measured auxiliary quantity value from a desired auxiliary quantity value, wherein a position of an adjusting element by which the variable turbine geometry is adjustable is measured as one of said at least one auxiliary quantity.