Regulating method for a turbocharger of an internal combustion engine, and turbocharger
AssigneeBorgWarner Inc.
InventorsVolker Mueller, Ralf Christmann, Gerd Spinner
Life of this patent
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Abstract
The invention relates to a regulating method for a turbocharger (1) with a turbine (4) which has a variable turbine geometry (VTG) provided with adjustable guide blades (5), having the following method steps: a) closing the guide blades (5) of the variable turbine geometry (VTG), as a function of the present operating point of the internal combustion engine which is turbocharged by means of the turbocharged (1), to the maximum possible closing position of the guide blades (5) for said operating point, and b) regulating the charge pressure (P2) by adjusting the position of the guide blades (5) in a closed regulating loop.
Claims9
A regulating method for a turbocharger (1) having a turbine (4) which has a variable turbine geometry (VTG) which is provided with adjustable guide blades (5), having the following method steps:
- a) closing the guide blades (5) of the variable turbine geometry (VTG), as a function of the present operating point of the internal combustion engine which is supercharged by means of the turbocharger (1), to the maximum possible closed position of the guide blades (5) for said operating point, and
- b) regulating the charge pressure (P2) by adjusting the position of the guide blades (5) in a closed regulating loop.
A turbocharger (1) for an internal combustion engine (6), in particular a spark-ignition or diesel engine,
- having a compressor (2);
- having a turbine (4) which is connected to the compressor (2) via a rotor shaft (3) and which has a variable turbine geometry VTG with adjustable guide blades (5),
- further comprising a regulating device (6) having the following components:
- a first determining device (7) for determining a nominal value (P2NOMINAL) for the charge pressure (P2) from rotational speed and torque data (n, T) of the internal combustion engine (6);
- a second determining device (8), which is connected in parallel with the first determining device (7), for determining the position of the guide blades (5) from the rotational speed and torque data (n, T) of the internal combustion engine (6);
- a regulator (9) for regulating the charge pressure (P2), which regulator (9) is connected in series with the first determining device (7) and regulates the charge pressure (P2) on the basis of the input rotational speed and torque values (n, T) and the nominal value (P2NOMINAL) of the charge pressure and, if appropriate, fed-back actual charge pressure values (P2ACTUAL);
- and
- a guide blade position regulator (10) which is connected in series with the regulator (9) and regulates the position of the guide blades (5) of the variable turbine geometry (VTG) on the basis of the nominal values (POSVTG—NOMINAL) of the guide blade position supplied by the second determining device (9), the output signals supplied by the regulator (9) and, if appropriate, fed-back actual values (POSVTG—ACTUAL) of the actual guide blade position.
Dependencies are inferred from the claim text.