Method of controlling a VTG engine
AssigneeScania CV AB (publ)
InventorsFredrik Swartling, Mikael Hanson, Mikael Persson, Mats Jennische
Life of this patent
Estimating the term…
Abstract
When controlling an engine provided with Variable Turbine Geometry (VTG), the VTG is closed to a maximally acceptable closed position without endangering the VTG when performing an up-shift. The VTG is kept in such a position during the gear shift which, allows for a quick retardation of the engine speed.
Claims15
A method of controlling an internal combustion engine that includes a turbo charger with a Variable Turbine Geometry for powering a motor vehicle that is provided with a gear box the method comprising:
- determining an effective flow area for the Variable Turbine Geometry;
- determining a maximally allowed closed position for the Variable Turbine Geometry from the determined effective flow area of the Variable Turbine Geometry;
- detecting that a shifting of a gear of the motor vehicle is initiated;
- and
- controlling the Variable Turbine Geometry to the maximally allowed closed position when the shifting of the gear is detected.
A system for controlling an internal combustion engine that includes a turbo charger with a Variable Turbine Geometry for powering a motor vehicle that is provided with a gear box, the system comprising at least one control unit that is configured and operable to:
- determine an effective flow area for the Variable Turbine Geometry,
- determine a maximally allowed closed position for the Variable Turbine Geometry from the determined effective flow area of the Variable Turbine Geometry,
- detect that a shifting of a gear of the motor vehicle is initiated, and
- control the Variable Turbine Geometry to the maximally allowed closed position when the shifting of the gear is detected.
A non-transitory computer readable storage medium storing a computer program product for controlling an internal combustion engine that includes a turbo charger with a Variable Geometry Turbine for powering a motor vehicle that is provided with a gear box wherein the computer program product comprises program segments that when executed on a computer for controlling the internal combustion engine causes the computer to perform the steps of:
- determining an effective flow area for the Variable Turbine Geometry,
- determining a maximally allowed closed position for the Variable Turbine Geometry from the determined effective flow area of the Variable Turbine Geometry,
- detecting that a shifting of a gear of the motor vehicle is initiated, and
- controlling the Variable Turbine Geometry to the maximally allowed closed position when the shifting of the gear is detected.
Dependencies are inferred from the claim text.