Exhaust-gas turbocharger for an internal combustion engine

A method for determining an air mass flowing to an internal combustion engine including an exhaust-gas turbocharger comprising an exhaust-gas turbine (16) arranged in an exhaust strand (14) of the internal combustion engine (10) and a compressor (20) arranged in an intake tract (18) of the internal combustion engine (10) and connected to the exhaust gas turbine (16) so as to be driven thereby, the compressor (20) including a compressor wheel (30) and a compressor housing (28) surrounding the compressor wheel (30) and having an inlet duct (32), and a dynamic pressure probe (38) provided upstream of a compressor wheel (30) in the inlet duct (32), said method comprising the steps of:

• measuring a total pressure and a static pressure in the inlet duct of the compressor (20),
• determining from the measured total pressure and from the measured static pressure a differential pressure in the inlet duct of the compressor;
• and
• determining from the determined differential pressure the air mass supplied to the internal combustion engine (10), with at least the total pressure in the inlet flow duct of the compressor being measured by a dynamic pressure probe (38) upstream of a compressor wheel (30) in the inlet duct (32) of the compressor (20).