Method for maximizing transient variable geometry turbine response in an internal combustion engine
AssigneeDeere & Company
InventorErik L. Piper
Life of this patent
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Abstract
A method of operating a variable geometry turbine (VTG) during transient operations for maximum response by determining the VTG area at the balance condition of the pressure ratio and efficiency curves for the variable geometry turbine to achieve maximum power. The method includes measurements of turbine inlet pressure, turbine outlet pressure, turbine rpm, and other parameters used to measure turbine mass flow.
Claims9
A method for controlling the variable turbine geometry (VTG) of a turbocharger turbine having a variable area inlet and produces a pressure ratio for an operator controlled, air breathing, fuel consuming, compression ignition, internal combustion engine, having an operator controlled fuel rate and a maximum permitted fueling rate, to produce maximum transience response, said method comprising the steps of:
- determining if operator controlled fueling rate exceeds the maximum permitted fueling rate;
- calculating the pressure ratio of said turbine as a function of the inlet area of said VTG, calculating turbine efficiency as a function of the inlet area of said VTG, determining the balance condition between pressure ratio and efficiency and commanding the VTG inlet area as a direct function of said balance condition.
Dependencies are inferred from the claim text.