Internal combustion engine system

An internal combustion engine (ICE) system comprising:

• an internal combustion engine;
• a turbocharger arrangement, the turbocharger arrangement having a turbine arranged in an exhaust gas conduit, the exhaust gas conduit extending between the internal combustion engine and the turbine, and further a compressor disposed in an inlet manifold, the inlet manifold extending between the compressor and the internal combustion engine, the compressor being configured to be connected to the turbine via a shaft;
• a controllable backpressure valve being located in the exhaust gas conduit, the controllable backpressure valve being configured to control the pressure within the exhaust gas conduit;
• a pressure sensor disposed in the exhaust gas conduit, and further in-between the controllable backpressure valve and the turbine, the pressure sensor being configured to measure an exhaust gas pressure downstream the controllable backpressure valve;
• a speed sensor configured to measure a compressor speed;
• and
• a control system for determining an operational status of the pressure sensor, wherein the control system comprises processing circuitry configured to:
• receive speed data from the speed sensor so as to determine a compressor speed;
• determine a pressure ratio over the compressor;
• determine a pressure drop over the compressor based on the determined compressor speed and the determined pressure ratio over the compressor;
• determine a first reference exhaust gas pressure at a position in-between the controllable backpressure valve and the turbine based on the determined pressure drop over the compressor;
• determine a second reference exhaust gas pressure using the pressure sensor;
• compare the determined first reference exhaust gas pressure with the determined second reference exhaust gas pressure;
• and
• determine that the pressure sensor is operational based on the comparison.