Patent ID: 9303556
Filing Date: 2016-04-05
CPC Classification: F01N,F02B,F02D,Y02T

Claim Text:
1. A method for operating a turbocharger system of an internal combustion engine including an electronic control unit including non-transitory instructions stored in memory, comprising: evaluating via the electronic control unit at least one sensor signal of the turbocharger system for detecting a failure mode of a sensorless low-pressure turbine bypass valve coupled across a low-pressure turbine, the low-pressure turbine positioned downstream of a high-pressure turbine, the turbines arranged sequentially in an exhaust path, the at least one sensor signal continuously evaluated during operation of the internal combustion engine for detecting the failure mode of the sensorless low-pressure turbine bypass valve; and upon detection of the failure mode of the sensorless low-pressure turbine bypass valve, adjusting a high-pressure turbine bypass valve coupled across the high-pressure turbine via the electronic control unit to maintain a desired boost pressure.