Method and control device for a turbocharger having a variable turbine flow cross section
AssigneeDr. Ing. h.c. F. Porsche Aktiengesellschaft
InventorsAndreas Sterner, Matthias Hofstetter
Life of this patent
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Abstract
An actual value of a turbine flow cross section of a turbocharger of an internal combustion engine in a motor vehicle is set for a change in the load on the internal combustion engine from a larger load value to a smaller load value. The actual value setting of the smaller load value is delayed to a setpoint value that is specified for the smaller load value under stationary conditions. A device controls the progression of the method.
Claims20
A method for setting a value of a turbine flow cross section of a turbocharger of an internal combustion engine in a motor vehicle comprising:
- changing a load on the internal combustion engine from a larger load value to a smaller load value as occurs after an acceleration and a subsequent heavy reduction of a torque requirement;
- determining an actual value of the turbine flow cross section;
- and
- transitioning from actual value of the turbine flow cross section to a setpoint value set for the smaller load value in a delayed manner to avoid a critical combination of hot guide blades and guide blades in an opened guide blade position, wherein said critical combination tends to jam the guide blades.
A controller for setting a value of a turbine flow cross section of a turbocharger of an internal combustion engine in a motor vehicle comprising:
- a control device, said control device is configured to receive a change in a load on the internal combustion engine from a larger load value to a smaller load value as occurs after an acceleration and a subsequent heavy reduction of a torque requirement;
- said control device is configured to determine an actual value of the turbine flow cross section;
- and
- said control device is configured to control a transition from said actual value of the turbine flow cross section to a setpoint value set for the smaller load value in a delayed manner to avoid a critical combination of hot guide blades and guide blades in an opened guide blade position, wherein said critical combination tends to jam the guide blades.
Dependencies are inferred from the claim text.