Hybrid vehicle engine arrangement

Abstract

A hybrid vehicle engine assembly (10), comprising an internal combustion engine (12) for driving the hybrid vehicle, at least one electric motor (16), which is an electric drive motor for driving the hybrid vehicle and thus for driving a vehicle part, at least one first vibration damper (14), which is arranged behind the internal combustion engine (12) as seen in the drive direction, and a torque sensor (20) with which the torque emanating from the internal combustion engine (12) is detected, wherein a second vibration damper (18) is provided, which is arranged behind the first vibration damper (14) as seen in the drive direction, wherein the second vibration damper (18) is formed by the electric motor (16), which can be controlled based on the torque signals of the torque sensor (20), characterized in that the torque sensor (20) is arranged in front of the first vibration damper (14) as seen in the drive direction,wherein the torque sensor (20) is a magnetoresistive sensor, wherein the magnetoresistive sensor (20) is integrated into a bearing unit of an output element of the internal combustion engine (12) or wherein the magnetoresistive sensor (20) is integrated into the first vibration damper (14).

Description

The invention relates to a hybrid vehicle motor arrangement, having an internal combustion engine for driving the hybrid vehicle, at least one electric motor which is an electric drive motor for driving the hybrid vehicle and thus for driving a vehicle part, at least one first vibration damper which is arranged behind the internal combustion engine as seen in the drive direction, and having a torque sensor with which the torque emanating from the internal combustion engine is detected, wherein a second vibration damper is provided which is arranged behind the first vibration damper as seen in the drive direction, wherein the second vibration damper is formed by the electric motor which can be driven on the basis of the torque signals of the torque sensor.The invention also relates to a method for damping the torsional vibrations which are produced during operation of the internal combustion engine.During operation of an internal combustion engine, rotational irregularities are produced, inter alia, by the combustion and the non-uniform movement of the masses, which are introduced into the downstream drive train components and lead to excitations of torsional oscillations in the drive train components. These torsional vibrations are the cause of jerks or at least of undesired noises.Torsional vibrations of this type are usually damped by mechanical torsional vibration dampers. A mechanical torsional vibration damper is disclosed, for example, in DE 195 15 350 B4. Alternatively, such torsional oscillations are actively damped by an electric motor, wherein the rotational speed and / or the torque of a drive train component is detected by a sensor arrangement and, based thereon, a torque is introduced into the drive train component by the electric motor. Such an embodiment is described, for example, in DE 197 21 298 C2. Furthermore, it is known from DE 41 00 937 A1 to use a second, electromotive torque buffer in an internal combustion engine arrangement in addition to a first, mechanical vibration damper in order to achieve an improvement in the vibration damping. It is also known from DE 199 54 325 A1 to use a stator generator as vibration damper.A disadvantage of such embodiments of the hybrid vehicle motor arrangement with an electric motor provided for active damping of the torsional vibrations is that particularly powerful and cost-intensive electronics must be used for processing the sensor signals of the sensor arrangement and for controlling the electric motor.From DE 10 2015 208 424 A1 a hybrid vehicle motor arrangement of the generic type is known. In this case, the already present electric motor can be used for vibration damping, so that no additional electric motor has to be provided for vibration damping. A similar arrangement is also known from DE 10 2014 205 136 A1. Various sensors are known from the prior art according to DE 102 00 409 A1, DE 11 2013 007 569 T5 and DE 197 48 665 A1.The object of the invention is therefore to provide a cost-effective hybrid vehicle motor arrangement which avoids the abovementioned disadvantage.This object is achieved by a hybrid vehicle motor arrangement having the features of independent claim 1 and a method according to the corresponding claim 2.In this case, the torque sensor is arranged before the first vibration damper, as viewed in the drive direction, wherein the torque sensor is a magnetoresistive sensor, wherein the magnetoresistive sensor is integrated into a bearing unit of an output element of the internal combustion engine, for example the crankshaft, or wherein the magnetoresistive sensor is integrated into the first vibration damper. By arranging the torque sensor in front of the first vibration damper as viewed in the drive direction or by integrating it therein and arranging the electric motor behind the first vibration damper as viewed in the drive direction, the unattenuated torsional vibrations directly emanating from the internal combustion engine are detected by the torque sensor, the torsional vibrations are delayed by the first vibration damper and a torque for damping the torsional vibrations is introduced by the electric motor. By delaying the torsional vibrations by the first vibration damper, the time is increased in order to process the torsional vibrations detected by the torque sensor and to actuate the electric motor based on the detected torsional vibrations. In this way, particularly efficient electronics can be dispensed with, and cost-effective electronics can be used for processing the torsional vibrations detected by the torque sensor and for actuating the electric motor. In addition, by means of such a hybrid vehicle motor arrangement, the torsional vibrations in the drive train are damped by a first, for example mechanical vibration damper, and by a second vibration damper, so that the torsional vibrations are virtually completely reduced.The magnetoresistive sensor detects the magnetic field changes of a magnetically encoded region of a component. In the present case, an output element, for example the crankshaft, has a magnetic coded region which interacts with the magnetoresistive sensor. The magnetic field of the magnetically encoded region changes as a result of the torsion of the output element, wherein the magnetic field changes are detected by the magnetoresistive sensor. Based on the magnetic field changes, the torque acting in the output element is determined.Preferably, in the case of the integration of the sensor into an output element, the magnetically encoded region can be formed on a component of the first vibration damper connected in a rotationally fixed manner to the output element and, as a result, the torque sensor can detect the unattenuated torsional vibrations emanating from the internal combustion engine.In addition, the object of the invention is to provide a cost-effective method for damping the torsional vibrations which are produced during operation of the internal combustion engine.The object is achieved by a method for damping the torsional vibrations which are produced during operation of the internal combustion engine in a hybrid vehicle motor arrangement of this type having the features of claim 2.The method has the following method steps: a) detecting the unattenuated torsional oscillations emanating from an internal combustion engine by means of a torque sensor, b) generating a damping control signal for damping the torsional oscillations already attenuated by a first vibration damper by means of an electric motor, wherein the damping control signal is based on the unattenuated torsional oscillations detected by the torque sensor and the damping control signal is predicted, and c) controlling the electric motor by means of the damping control signalBy delaying the torsional vibrations by the first vibration damper and detecting the torsional vibrations serving for driving the electric motor before the first vibration damper, the time duration is increased in order to process the torsional vibrations detected by the torque sensor into damping drive signals and to drive the electric motor by the damping drive signals. As a result, the electronics used for processing the torsional oscillations and for controlling the electric motor can be designed in a simple and cost-effective manner.An exemplary embodiment of the invention is explained in more detail with reference to the drawings.Here, the figure schematically shows a hybrid vehicle motor assembly.The figure shows a vehicle engine assembly 10 of a hybrid vehicle. The vehicle motor assembly 10 includes an engine 12 and an electric motor 16 electrically connected to a battery 22, the engine 12 and the electric motor 16 serving to propel the hybrid vehicle. In addition, the vehicle-engine arrangement 10 has a transmission 24, which is mechanically coupled to the rear wheels 40, 42 of the vehicle and transmits the drive power emanating from the internal combustion engine 12 and from the electric motor 16 to the rear wheels 40, 42 as required.The internal combustion engine 12 causes rotational irregularities due to the combustions of the fuel mixture within the individual cylinders and the non-uniform movement of the masses, which are introduced into the drive train components such as the crankshaft or the transmission and cause rotational vibrations in the drive train components.For damping the torsional vibrations, the vehicle engine arrangement 10 has a first vibration damper 14, which is designed as a mechanical vibration damper, for example as a dual-mass flywheel. The first vibration damper 14 is coupled to the internal combustion engine 12 via an output element 28 of the internal combustion engine 12, for example a crankshaft. In addition, the vehicle engine arrangement has a second vibration damper 18, the second vibration damper 18 being formed by the electric motor 16.During operation, the torque emanating from the internal combustion engine 12 or the unattenuated torsional oscillations emanating from the internal combustion engine 12 are detected by a torque sensor 20 and forwarded to a control unit 26. In the control unit 26, the unattenuated torsional oscillations are processed and an attenuation control signal is generated, wherein the attenuation control signal is predicted on the basis of the detected unattenuated torsional oscillations. The electric motor 16 is actuated with the damping actuation signal, wherein the electric motor 16 is coupled to the control unit 26.Other structural embodiments than the described embodiments are also possible, which fall within the scope of protection of the main claim.

Claims

Hybrid vehicle motor arrangement (10), having an internal combustion engine (12) for driving the hybrid vehicle, having at least one electric motor (16) which is an electric drive motor for driving the hybrid vehicle and is therefore for driving a vehicle part, having at least one first vibration damper (14) which is arranged behind the internal combustion engine (12) as seen in the drive direction, and having a torque sensor (20) with which the torque emanating from the internal combustion engine (12) is detected, wherein a second vibration damper (18) is provided which is arranged behind the first vibration damper (14) as seen in the drive direction, wherein the second vibration damper (18) is formed by the electric motor (16) which can be driven on the basis of the torque signals from the torque sensor (20), characterized in that the torque sensor (20) is arranged in front of the first vibration damper (14) as seen in the drive direction, wherein the torque sensor (20) is a magnetoresistive sensor, wherein the magnetoresistive sensor (20) is integrated into a bearing unit of an output element of the internal combustion engine (12), or wherein the magnetoresistive sensor (20) is integrated into the first vibration damper (14).Method for damping the torsional vibrations arising during operation of the internal combustion engine (12) in a hybrid vehicle engine arrangement (10) according to Claim 1, characterized bythe method steps: a) detecting the unattenuated torsional vibrations emanating from an internal combustion engine (12) by a torque sensor (20), b) generating a damping control signal for damping the torsional vibrations already damped by a first vibration damper (14) by an electric motor (16), wherein the damping control signal is based on the unattenuated torsional vibrations detected by the torque sensor (20) and the damping control signal is predicted, and c) controlling the electric motor (16) by the damping control signal

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