Damping device and damping method for suppressing torsional oscillations in a drivetrain
AssigneeSiemens Aktiengesellschaft
InventorsJulian Baumann, Thomas Schlegl, Dara Daniel Torkzadeh
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Abstract
A damping device comprises a device (4, 7) for determining a mechanical state variable (ΔαMODEL, ΔαACTUAL) reproducing the torsion of a drivetrain (3) of an internal combustion engine (1) and an actuator (2) to activate an internal combustion engine (1) with a control variable as a function of the mechanical state variable (ΔαMODEL, ΔαACTUAL). It is proposed that the mechanical state variable (ΔαMODEL, ΔαACTUAL) be determined by a predictor element (4) that contains a model of the drivetrain (3) and/or the internal combustion engine (1).
Claims22
A damping device for suppressing torsional oscillations in a drivetrain of an internal combustion engine, comprising:
- an adaptable device for determining a mechanical state model variable reproducing a torsion of the drivetrain comprising a predictor element that contains a model of the drivetrain and the internal combustion engine and determines the mechanical state model variable as a response of the drivetrain and the internal combustion engine to a control variable on the basis of the model, and
- an actuator for activating the internal combustion engine depending on the control variable, wherein the control variable is determined by a predefined set variable and said mechanical state model variable,
- a measuring device measuring a mechanical state variable of said drivetrain and the internal combustion engine;
- and
- an adaptation unit operable to adapt said adaptable device, wherein said adaptation unit receives the difference between said mechanical state variable and a time delayed mechanical state model variable.
An engine control comprising a damping device for suppressing torsional oscillations in a drivetrain of an internal combustion engine, comprising:
- an adaptable device for determining a mechanical state model variable reproducing a torsion of the drivetrain comprising a predictor element that contains a model of the drivetrain and the internal combustion engine and determines the mechanical state model variable as a response of the drivetrain and the internal combustion engine to a control variable on the basis of the model, and
- an actuator for activating the internal combustion engine depending on the control variable, wherein the control variable is determined by a predefined set variable and said mechanical state model variable,
- a measuring device measuring a mechanical state variable of said drivetrain and the internal combustion engine;
- and
- an adaptation unit operable to adapt said adaptable device according to said a mechanical state variable.
A damping method to suppress torsional oscillations in the drivetrain of an internal combustion engine comprising the steps of:
- receiving a set variable;
- controlling an actuator of an internal combustion engine by a control variable according to said set variable;
- Determining by a model a mechanical state model variable representing a simulated value of the torsion generated by said internal combustion engine with said set variable,
- correcting said control variable by said mechanical state model variable, and
- Measuring the actual mechanical state variable generated by the internal combustion engine,
- Time delaying said mechanical state model variable, and
- Adapting said model according to a difference between said actual mechanical state variable and said mechanical state model variable.
Dependencies are inferred from the claim text.