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Abstract

A magnetoelastic torque sensor system (10) for a drive train (12) is described which comprises a primary sensor unit (14) having at least one magnetoelastic portion (40) formed by a magnetoelastic material for reacting on an occurring stress due to torque generated by an engine (20), particularly torque contribution of an individual cylinder (22) of an engine (20). The magnetoelastic material is configured to generate a magnetic field and/or alternate an already existing magnetic field in response to the stress. The magnetoelastic torque sensor system (10) also comprises a secondary sensor unit (16) having at least one magnetic sensitive part (18), in particular a fluxgate, which measures the generated magnetic field or the alternating magnetic field of the magnetoelastic portion (40). The magnetoelastic torque sensor system (10) also comprises an electronic control unit (32) for receiving and processing the signals provided by the secondary sensor unit (16), wherein the electronic control unit (32) in particular controls and/or reads out the at least one magnetic sensitive part (18) of the secondary sensor unit (16) and generates a signal which correlates with the stress applied to the primary sensor unit (14). Further, a drive train (12), a method of measuring torque in a drive train (12), a method of operating a drive train (12) and a method of manufacturing a primary sensor unit (16) are described.

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