METHOD AND DEVICE FOR DETERMINING A ROTATIONAL SPEED OF A CRANKSHAFT OF AN INTERNAL COMBUSTION ENGINE

The invention relates to a method for determining a rotation variable, particularly a rotational speed (n), a rotational angle position (ϑ, ϑ1) or a direction of rotation (α+,α-) of a shaft (17), particularly a crankshaft (17') of an internal combustion engine (112), which is coupled to an elec...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	MADIVALA VEERABASAPPA, Vijaya Kumar, REICHE, Andre, MUELLER, Jonathan, FISCHER, Wolfgang, GRODDE, Stefan, REINEKE, Bastian
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS BLASTING COMBUSTION ENGINES CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING COMBUSTION ENGINES CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT LIGHTING MEASURING MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR MECHANICAL ENGINEERING PHYSICS TARIFF METERING APPARATUS TESTING WEAPONS
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Beschreibung
Zusammenfassung:	The invention relates to a method for determining a rotation variable, particularly a rotational speed (n), a rotational angle position (ϑ, ϑ1) or a direction of rotation (α+,α-) of a shaft (17), particularly a crankshaft (17') of an internal combustion engine (112), which is coupled to an electrical machine (30) in a direct or geared manner, said electrical machine comprising a rotor (32) and a stator (33) with at least two phase windings (U, V, W), from each of which at least one phase signal (Uu, Uv, Uw, lu, lv, lw) is derived, wherein the phase signals (Uu, Uv, Uw, lu, lv, lw) each have rising edges (Flu u, Flv u, Flw u), falling edges (Flud, Flvd, Flwd) and/or zero crossings (Fluo, Flvo, Flwo), a sum signal (Usum) comprising a plurality of phase signals (Uu, Uv, Uw, lu, lv, lw) of the electrical machine (30) is produced such that a characteristic pulse (Pf1, Pf2, Pf3, Pr1, Pr2, Pr3) in the sum signal (Usum) is associated with each of the rising edges (Fluu, Flvu, Flwu), falling edges (Flud, Flvd, Flwd) and/or zero crossings (Fluo, Flvo, Flwo), and the pulses (Pf1, Pf2, Pf3, Pr1, Pr2, Pr3) being used to determine the the rotational speed (n), the rotational angle position (ϑ, ϑ1) or the direction of rotation (α+,α-) of the rotor (32). The invention also relates to a device for producing a sum signal (Usum) from a plurality of phase signals (Uu, Uv, Uw, lu, lv, lw), which is used to determine a rotational speed (n) of a shaft (17). The invention further relates to a corresponding arithmetic unit designed to carry out the method and to a computer program for carrying out the method.