WO2005039946A1 - Hydraulic power unit comprising an integrated sensor device - Google Patents

Hydraulic power unit comprising an integrated sensor device Download PDF

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Publication number
WO2005039946A1
WO2005039946A1 PCT/DE2004/002042 DE2004002042W WO2005039946A1 WO 2005039946 A1 WO2005039946 A1 WO 2005039946A1 DE 2004002042 W DE2004002042 W DE 2004002042W WO 2005039946 A1 WO2005039946 A1 WO 2005039946A1
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WO
WIPO (PCT)
Prior art keywords
hydraulic unit
hydraulic
unit according
fastening points
plane
Prior art date
Application number
PCT/DE2004/002042
Other languages
German (de)
French (fr)
Inventor
Manfred Abendroth
Andreas Weh
Markus Klausner
Georg Fetzer
Giuseppe Di Giandomenico
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2005039946A1 publication Critical patent/WO2005039946A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/36—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition including a pilot valve responding to an electromagnetic force
    • B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control systems
    • B60T8/3675—Electromagnetic valves specially adapted for anti-lock brake and traction control systems integrated in modulator units
    • B60T8/368—Electromagnetic valves specially adapted for anti-lock brake and traction control systems integrated in modulator units combined with other mechanical components, e.g. pump units, master cylinders
    • B60T8/3685—Electromagnetic valves specially adapted for anti-lock brake and traction control systems integrated in modulator units combined with other mechanical components, e.g. pump units, master cylinders characterised by the mounting of the modulator unit onto the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/02—Arrangements of pumps or compressors, or control devices therefor

Definitions

  • the present invention relates to a hydraulic unit with an integrated sensor device, which is used in particular in vehicle dynamics systems and braking systems of vehicles.
  • ESP electronic stability programs
  • a control system is integrated into the brake system and the drive train of the vehicle, in particular to prevent the vehicle from breaking away from the side.
  • ESP systems have a control unit and a hydraulic unit as well as a large number of sensors.
  • the hydraulic unit usually comprises a pump and a drive element as well as valves and throttles located therein in order to apply braking pressure to individual wheels in a corresponding manner.
  • a steering wheel angle sensor, a rotation rate sensor (yaw rate sensor) and a are sensors
  • Transverse acceleration sensor provided.
  • the rotation rate sensor and the lateral acceleration sensor are usually arranged in the middle of the vehicle.
  • damping elements are arranged between the hydraulic unit and the holder, in particular to dampen structure-borne noise caused by the operation of the hydraulic unit.
  • the type of suspension means that accelerations applied externally to the bracket, such as from the roadway, the chassis, etc., and also internally generated accelerations, such as from the engine or valves, in torsional movements of the hydraulic unit result. These torsional movements of the hydraulic unit cannot be sufficiently eliminated by the known related damping elements between the hydraulic unit and the holder.
  • the hydraulic unit according to the invention with the features of patent claim 1 has the advantage that it includes both a control unit and a sensor device.
  • the hydraulic unit has at least three fastening points for fastening to a holder.
  • the at least three fastening points span a plane which is arranged near a center of gravity of the hydraulic unit.
  • This measure according to the invention makes it possible for the sensor devices to be arranged on the hydraulic unit, since this fastening of the hydraulic unit results in minimizing torsional movements of the hydraulic unit as a result of linear accelerations. This results in a significant reduction in interference signals on the hydraulic unit, so that an arrangement of sensor devices on the hydraulic unit is possible.
  • a compact hydraulic unit with integrated sensor devices can be provided, which in particular can also be produced inexpensively and is easy to assemble.
  • the measure according to the invention thus makes it possible for the first time to arrange sensor devices directly on the hydraulic unit.
  • Hydraulic unit and the holder can continue the
  • the center of gravity of the hydraulic unit is determined taking into account all components present on the hydraulic unit, in particular a motor of the hydraulic unit and a control unit.
  • the plane spanned by at least three fastening points is particularly preferably spanned a maximum of 10 mm from the center of gravity of the hydraulic unit.
  • the interfering signals that may occur remain within an acceptable tolerance range, so that there are no negative effects on the sensor devices on the hydraulic unit.
  • the center of gravity of the hydraulic unit is particularly preferably located directly in the plane spanned by the fastening points, so that disturbances for the sensor devices are minimized.
  • the sensor devices are preferably likewise arranged in the plane spanned by the fastening points.
  • a housing of the hydraulic unit is preferably constructed in such a way that it has a plurality of side surfaces and the fastening points for fastening the hydraulic unit are arranged on two opposite side surfaces.
  • the fastening points for fastening the hydraulic unit are arranged on two opposite side surfaces.
  • two attachment points can be arranged on one side surface of the housing and one attachment point on the opposite side surface.
  • the three attachment points are particularly preferably arranged such that their imaginary connecting lines form an isosceles triangle.
  • the fastening points of the hydraulic unit are arranged on two adjacent side surfaces of the housing.
  • the hydraulic unit is constructed in such a way that exactly one fastening point is arranged on one side surface of the housing.
  • the hydraulic unit particularly preferably has four fastening points or more fastening points.
  • the sensor device is preferably integrated in the control unit of the hydraulic unit.
  • the sensor device is particularly preferably an inertial sensor, in particular a rotation rate sensor and / or an acceleration sensor.
  • the hydraulic unit according to the invention is preferably used in vehicle dynamics systems, in particular in electronic stability programs (ESP) and / or in electro-hydraulic brake systems (EMS). It is further preferred to use at least two acceleration sensors. These acceleration sensors are rotated by 90 ° to each other so that accelerations / decelerations can be recorded in an XY plane. A sensor preferably records the lateral accelerations of the vehicle. As a result, there is still the possibility that the hydraulic unit in the of the two
  • the actual acceleration in the X or Y direction can be calculated by vector decomposition using the known angle of rotation. This results in an additional degree of freedom for the vehicle manufacturer with regard to the installation of the hydraulic unit, since the hydraulic unit can be installed rotated in the XY plane and any existing space problems can thus be solved.
  • a plurality of fastening points can be provided on the hydraulic unit according to the invention, different fastening points being able to be used depending on the vehicle manufacturer. This can significantly reduce the number of variants for the housing. In each case, only the boundary condition must be observed that the vehicle manufacturer uses at least three fastening points that span a plane that is close to the center of gravity of the whole Hydraulic unit is located. Thus, all of the fastening points provided on the hydraulic unit do not necessarily have to lie in the plane, it is sufficient if three fastening points always span a plane which is arranged near the center of gravity of the hydraulic unit or which also includes the center of gravity of the hydraulic unit.
  • Figure 1 is a schematic side view of a hydraulic unit according to a first embodiment of the present invention.
  • Figure 2 is a schematic, perspective view of the hydraulic unit shown in Figure 1.
  • the hydraulic unit comprises an actual hydraulic unit consisting of an essentially cuboid housing 2 and a motor 3 arranged in a cylindrical (pot-shaped) housing
  • Hydraulic unit 1 a control unit 4 with an electrical plug connection 6 (see FIG. 2).
  • a rotation rate sensor 5 is integrated in the control unit 4.
  • the pump and valves, throttles, line connections and other hydraulic devices for providing the hydraulic functions are arranged in the housing 2 of the hydraulic unit.
  • the hydraulic unit 1 is fastened to a holder 10 via three fastening points 7, 8, 9.
  • the holder 10 is essentially formed from sheets arranged in a U-shape.
  • the holder 10 is itself attached to another component of a vehicle, which is not shown in the figures for reasons of clarity.
  • damping elements 11 for damping and absorbing the structure-borne noise are arranged between the housing 2 and the holder.
  • the three fastening points 7, 8, 9 form a plane E.
  • the overall center of gravity S of the hydraulic unit including the housing 2, the motor 3 and the control unit 4, is arranged.
  • This arrangement of the center of gravity in the plane E of the fastening points 7, 8, 9 minimizes torsional movements of the hydraulic unit 1, so that it is possible to arrange a rotation rate sensor 5 on the hydraulic unit 1.
  • the damping elements 11 are selected with regard to their stiffness and other physical parameters in such a way that an optimum is achieved from the highest possible resonance frequency and the lowest possible resonance increase on the one hand and low noise on the other hand.
  • the for the The suspension 10 of the hydraulic unit 1 used must itself be as rigid as possible in order not to have resonance phenomena in the low frequency range, in particular up to 50 Hz.
  • Triangular stiffening elements 15 are therefore arranged in the corners for stiffening.
  • sensor devices such as an acceleration sensor for detecting an acceleration or a deceleration, can also be integrated on the hydraulic unit or in the control unit 4.
  • the hydraulic unit 1 according to the invention is used in particular in the case of electronic stability systems and electro-hydraulic brake systems used.
  • the arrangement of the rotation rate sensor 5 in the control unit 4 thus also reduces the assembly costs for such systems, since in the prior art the sensors had always had to be mounted separately on the vehicle.
  • the arrangement of the fastening points according to the invention makes it possible for the first time to integrate sensor devices directly into the hydraulic unit and in particular into the control unit.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Regulating Braking Force (AREA)
  • Measuring Fluid Pressure (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The invention relates to a hydraulic power unit comprising a hydraulic unit (2, 3), a control device (4), and a sensor device (5). The inventive hydraulic power unit is provided with at least three fixing points (7, 8, 9) in order to be fixed to a holding element (10), said fixing points (7, 8, 9) defining a plane (E) close to a centre of gravity (S) of the hydraulic power unit.

Description

Hydraulikaggregat mit integrierter SensorvorrichtungHydraulic unit with integrated sensor device
Die vorliegende Erfindung betrifft ein Hydraulikaggregat mit einer integrierten Sensorvorrichtung, welches insbesondere in Fahrdynamiksystemen und Bremssystemen von Fahrzeugen verwendet wird.The present invention relates to a hydraulic unit with an integrated sensor device, which is used in particular in vehicle dynamics systems and braking systems of vehicles.
Bei Fahrdynamiksystemen, wie z.B. elektronischen Stabilitätsprogrammen (ESP) wird ein Regelsystem in das Bremssystem und den Antriebsstrang des Fahrzeugs integriert, um insbesondere das seitliche Ausbrechen des Fahrzeugs zu verhindern. Bekannte ESP-Systeme weisen eine Steuereinheit und eine Hydraulikeinheit sowie eine Vielzahl von Sensoren auf. Die Hydraulikeinheit umfasst üblicherweise eine Pumpe und ein Antriebselement sowie darin befindliche Ventile und Drosseln, um in entsprechender Weise Bremsdruck an einzelnen Rädern auszuüben. Als Sensoren sind üblicherweise ein Lenkradwinkelsensor, ein Drehratensensor (Giergeschwindigkeitssensor) und einIn driving dynamics systems, such as electronic stability programs (ESP), a control system is integrated into the brake system and the drive train of the vehicle, in particular to prevent the vehicle from breaking away from the side. Known ESP systems have a control unit and a hydraulic unit as well as a large number of sensors. The hydraulic unit usually comprises a pump and a drive element as well as valves and throttles located therein in order to apply braking pressure to individual wheels in a corresponding manner. Usually, a steering wheel angle sensor, a rotation rate sensor (yaw rate sensor) and a are sensors
Querbeschleunigungssensor vorgesehen. Der Drehratensensor und der Querbeschleunigungssensor sind üblicherweise in der Mitte des Fahrzeugs angeordnet. Mit zunehmender Verkleinerung von Elektronikbauteilen wurde es auch möglich, das Steuergerät sehr kompakt zu gestalten, so dass dieses üblicherweise unmittelbar am Hydraulikaggregat befestigt ist. Dieses kombinierte Steuer- und Hydraulikaggregat wird über eine Halteplatte an anderen Bauteilen des Fahrzeugs befestigt. Hierbei werden zwischen dem Hydraulikaggregat und dem Halter Dämpfungselemente angeordnet, um insbesondere einen durch den Betrieb des Hydraulikaggregats verursachten Körperschall zu dämpfen. Bei den bisher verwendeten Halterungen hat jedoch die Art der Aufhängung zur Folge, dass extern auf den Halter aufgebrachte Beschleunigungen, wie z.B. von der Fahrbahn, dem Chassis, usw. und auch intern erzeugte Beschleunigungen, wie z.B. vom Motor oder Ventilen, in Torsionsbewegungen des Hydraulikaggregats resultieren. Diese Torsionsbewegungen des Hydraulikaggregats können auch durch die bekannten verwandten Dämpfungselemente zwischen Hydraulikaggregat und Halter nicht in ausreichender Weise eliminiert werden.Transverse acceleration sensor provided. The rotation rate sensor and the lateral acceleration sensor are usually arranged in the middle of the vehicle. As electronic components became smaller, it became possible to make the control unit very compact, so that it is usually attached directly to the hydraulic unit is. This combined control and hydraulic unit is attached to other components of the vehicle via a holding plate. Here, damping elements are arranged between the hydraulic unit and the holder, in particular to dampen structure-borne noise caused by the operation of the hydraulic unit. With the brackets used so far, however, the type of suspension means that accelerations applied externally to the bracket, such as from the roadway, the chassis, etc., and also internally generated accelerations, such as from the engine or valves, in torsional movements of the hydraulic unit result. These torsional movements of the hydraulic unit cannot be sufficiently eliminated by the known related damping elements between the hydraulic unit and the holder.
Vorteile der ErfindungAdvantages of the invention
Das erfindungsgemäße Hydraulikaggregat mit den Merkmalen des Patentanspruchs 1 weist demgegenüber den Vorteil auf, dass es sowohl ein Steuergerät als auch eine Sensorvorrichtung umfasst. Dies wird erfindungsgemäß dadurch ermöglicht, dass das Hydraulikaggregat wenigstens drei Befestigungspunkte zur Befestigung an einer Halterung aufweist. Die wenigstens drei Befestigungspunkte spannen eine Ebene auf, welche nahe eines Schwerpunktes des Hydraulikaggregats angeordnet ist. Durch diese erfindungsgemäße Maßnahme ist es möglich, dass die Sensorvorrichtungen am Hydraulikaggregat angeordnet werden, da durch diese Befestigung des Hydraulikaggregats eine Minimierung von Torsionsbewegungen des Hydraulikaggregats als Folge von linearen Beschleunigungen resultiert. Dadurch wird eine signifikante Reduzierung von Störsignalen am Hydraulikaggregat erreicht, so dass eine Anordnung von Sensorvorrichtungen am Hydraulikaggregat möglich ist. Dadurch kann erfindungsgemäß ein kompaktes Hydraulikaggregat mit integrierten Sensorvorrichtungen bereitgestellt werden, welches insbesondere auch kostengünstig herstellbar ist und einfach montierbar ist. Die erfindungsgemäße Maßnahme macht es somit zum ersten Mal möglich, Sensorvorrichtungen direkt am Hydraulikaggregat anzuordnen.The hydraulic unit according to the invention with the features of patent claim 1 has the advantage that it includes both a control unit and a sensor device. This is made possible according to the invention in that the hydraulic unit has at least three fastening points for fastening to a holder. The at least three fastening points span a plane which is arranged near a center of gravity of the hydraulic unit. This measure according to the invention makes it possible for the sensor devices to be arranged on the hydraulic unit, since this fastening of the hydraulic unit results in minimizing torsional movements of the hydraulic unit as a result of linear accelerations. This results in a significant reduction in interference signals on the hydraulic unit, so that an arrangement of sensor devices on the hydraulic unit is possible. As a result, according to the invention, a compact hydraulic unit with integrated sensor devices can be provided, which in particular can also be produced inexpensively and is easy to assemble. The measure according to the invention thus makes it possible for the first time to arrange sensor devices directly on the hydraulic unit.
Durch eine Anordnung von Dämpfungselementen zwischen demBy arranging damping elements between the
Hydraulikaggregat und dem Halter kann dabei weiterhin dieHydraulic unit and the holder can continue the
Anforderung hinsichtlich einer Dämpfung von durch denRequirement for a damping by the
Betrieb des Hydraulikaggregats verursachtem Körperschall erfüllt werden.Operation of the hydraulic unit caused structure-borne noise.
Der Schwerpunkt des Hydraulikaggregats wird dabei unter Berücksichtigung aller am Hydraulikaggregat vorhandenen Bauteile, insbesondere einem Motor des Hydraulikaggregats und einem Steuergerät, bestimmt.The center of gravity of the hydraulic unit is determined taking into account all components present on the hydraulic unit, in particular a motor of the hydraulic unit and a control unit.
Die Unteransprüche zeigen bevorzugte Weiterbildungen der Erfindung .The subclaims show preferred developments of the invention.
Besonders bevorzugt ist die durch wenigstens drei Befestigungspunkte aufgespannte Ebene maximal 10 mm vom Schwerpunkt des Hydraulikaggregats entfernt aufgespannt. Die dabei eventuell auftretenden Störsignale bleiben innerhalb eines annehmbaren Toleranzbereichs, so dass sich keine negativen Auswirkungen auf die Sensorvorrichtungen am Hydraulikaggregat ergeben.The plane spanned by at least three fastening points is particularly preferably spanned a maximum of 10 mm from the center of gravity of the hydraulic unit. The interfering signals that may occur remain within an acceptable tolerance range, so that there are no negative effects on the sensor devices on the hydraulic unit.
Besonders bevorzugt liegt der Schwerpunkt des Hydraulikaggregats jedoch unmittelbar in der durch die Befestigungspunkte aufgespannten Ebene, so dass Störungen für die Sensorvorrichtungen minimiert sind. Besonders bevorzugt sind die Sensorvorrichtungen ebenfalls in der durch die Befestigungspunkte aufgespannte Ebene angeordnet.However, the center of gravity of the hydraulic unit is particularly preferably located directly in the plane spanned by the fastening points, so that disturbances for the sensor devices are minimized. Especially the sensor devices are preferably likewise arranged in the plane spanned by the fastening points.
Vorzugsweise ist ein Gehäuse des Hydraulikaggregats derart aufgebaut, dass es mehrere Seitenflächen aufweist und die Befestigungspunkte zur Befestigung des Hydraulikaggregats sind an zwei einander gegenüberliegenden Seitenflächen angeordnet. Wenn beispielsweise drei Befestigungspunkte vorgesehen sind, können zwei Befestigungspunkte an einer Seitenfläche des Gehäuses und ein Befestigungspunkt an der gegenüberliegenden Seitenfläche angeordnet werden. Dabei sind die drei Befestigungspunkte besonders bevorzugt derart angeordnet, dass ihre gedachten Verbindungslinien ein gleichschenkliges Dreieck bilden.A housing of the hydraulic unit is preferably constructed in such a way that it has a plurality of side surfaces and the fastening points for fastening the hydraulic unit are arranged on two opposite side surfaces. For example, if three attachment points are provided, two attachment points can be arranged on one side surface of the housing and one attachment point on the opposite side surface. The three attachment points are particularly preferably arranged such that their imaginary connecting lines form an isosceles triangle.
Gemäß einer anderen bevorzugten Ausgestaltung der vorliegenden Erfindung sind die Befestigungspunkte des Hydraulikaggregats an zwei einander benachbarten Seitenflächen des Gehäuses angeordnet.According to another preferred embodiment of the present invention, the fastening points of the hydraulic unit are arranged on two adjacent side surfaces of the housing.
Gemäß einer noch anderen bevorzugten Ausgestaltung der Erfindung ist das Hydraulikaggregat derart aufgebaut, dass an einer Seitenfläche des Gehäuses genau ein Befestigungspunkt angeordnet ist.According to yet another preferred embodiment of the invention, the hydraulic unit is constructed in such a way that exactly one fastening point is arranged on one side surface of the housing.
Besonders bevorzugt weist das Hydraulikaggregat vier Befestigungspunkte oder mehr Befestigungspunkte auf.The hydraulic unit particularly preferably has four fastening points or more fastening points.
Um ein besonders kompaktes Hydraulikaggregat bereitzustellen, ist die Sensorvorrichtung vorzugsweise in das Steuergerät des Hydraulikaggregats integriert. Besonders bevorzugt ist die Sensorvorrichtung ein Inertialsensor, insbesondere ein Drehratensensor und/oder ein Beschleunigungssensor.In order to provide a particularly compact hydraulic unit, the sensor device is preferably integrated in the control unit of the hydraulic unit. The sensor device is particularly preferably an inertial sensor, in particular a rotation rate sensor and / or an acceleration sensor.
Das erfindungsgemäße Hydraulikaggregat wird vorzugsweise in Fahrdynamiksystemen, insbesondere in elektronischen Stabilitätsprogrammen (ESP) und/oder in elektrohydraulischen Bremssystemen (EHB) verwendet. Weiter bevorzugt werden mindestens zwei Beschleunigungssensoren verwendet. Diese Beschleunigungssensoren sind zueinander um 90° verdreht angeordnet, sodass Beschleunigungen/Verzögerungen in einer XY-Ebene aufgenommen werden können. Dabei nimmt ein Sensor vorzugsweise die Querbeschleunigungen des Fahrzeugs auf. Dadurch besteht weiterhin die Möglichkeit, dass das Hydraulikaggregat in der von den beidenThe hydraulic unit according to the invention is preferably used in vehicle dynamics systems, in particular in electronic stability programs (ESP) and / or in electro-hydraulic brake systems (EMS). It is further preferred to use at least two acceleration sensors. These acceleration sensors are rotated by 90 ° to each other so that accelerations / decelerations can be recorded in an XY plane. A sensor preferably records the lateral accelerations of the vehicle. As a result, there is still the possibility that the hydraulic unit in the of the two
Beschleunigungssensoren aufgespannten Ebene in einem frei wählbaren Winkel anzuordnen. Die wirkliche Beschleunigung in X- bzw. Y-Richtung kann durch Vektorzerlegung mit dem bekannten Verdrehwinkel errechnet werden. Dadurch ergibt sich für die Fahrzeughersteller bezüglich des Einbaues des Hydraulikaggregats ein zusätzlicher Freiheitsgrad, da das Hydraulikaggregat in der XY-Ebene gedreht eingebaut werden kann und damit evtl. vorhandene Platzprobleme gelöst werden können.Arrange acceleration sensors spanned plane at a freely selectable angle. The actual acceleration in the X or Y direction can be calculated by vector decomposition using the known angle of rotation. This results in an additional degree of freedom for the vehicle manufacturer with regard to the installation of the hydraulic unit, since the hydraulic unit can be installed rotated in the XY plane and any existing space problems can thus be solved.
Es sei weiterhin angemerkt, dass am erfindungsgemäßen Hydraulikaggregat eine Vielzahl von Befestigungspunkten vorgesehen werden kann, wobei je nach Fahrzeughersteller unterschiedliche Befestigungspunkte verwendet werden können. Dadurch kann die Variantenanzahl für das Gehäuse deutlich reduziert werden. Dabei muss jeweils nur die Randbedingung beachtet werden, dass vom Fahrzeughersteller wenigstens drei Befestigungspunkte verwendet werden, welche eine Ebene aufspannen, welche nahe des Schwerpunkts des gesamten Hydraulikaggregats liegt. Somit müssen nicht notwendigerweise alle am Hydraulikaggregat vorgesehenen Befestigungspunkte in der Ebene liegen, es genügt, wenn immer drei Befestigungspunkte eine Ebene aufspannen, welche nahe des Schwerpunkts des Hydraulikaggregats angeordnet ist bzw. welche den Schwerpunkt des Hydraulikaggregats mit umfasst .It should also be noted that a plurality of fastening points can be provided on the hydraulic unit according to the invention, different fastening points being able to be used depending on the vehicle manufacturer. This can significantly reduce the number of variants for the housing. In each case, only the boundary condition must be observed that the vehicle manufacturer uses at least three fastening points that span a plane that is close to the center of gravity of the whole Hydraulic unit is located. Thus, all of the fastening points provided on the hydraulic unit do not necessarily have to lie in the plane, it is sufficient if three fastening points always span a plane which is arranged near the center of gravity of the hydraulic unit or which also includes the center of gravity of the hydraulic unit.
Zeichnungdrawing
Nachfolgend wird unter Bezugnahme auf die Zeichnung ein Ausführungsbeispiel der vorliegenden Erfindung beschrieben. In der Zeichnung ist:An exemplary embodiment of the present invention is described below with reference to the drawing. In the drawing is:
Figur 1 eine schematische Seitenansicht eines Hydraulikaggregats gemäß einem ersten Ausführungsbeispiel der vorliegenden Erfindung, undFigure 1 is a schematic side view of a hydraulic unit according to a first embodiment of the present invention, and
Figur 2 eine schematische, perspektivische Ansicht des in Figur 1 gezeigten Hydraulikaggregats .Figure 2 is a schematic, perspective view of the hydraulic unit shown in Figure 1.
Beschreibung des AusführungsbeispielsDescription of the embodiment
In den Figuren 1 und 2 ist ein Hydraulikaggregat gemäß einem ersten Ausführungsbeispiel der vorliegenden Erfindung dargestellt. Wie in Figur 1 gezeigt, umfasst das Hydraulikaggregat eine eigentliche Hydraulikeinheit bestehend aus einem im Wesentlichen quaderförmigen Gehäuse 2 und einem in einem zylinderförmigen (topfförmigen) Gehäuse angeordneten Motor 3. Weiterhin umfasst das1 and 2 show a hydraulic unit in accordance with a first exemplary embodiment of the present invention. As shown in FIG. 1, the hydraulic unit comprises an actual hydraulic unit consisting of an essentially cuboid housing 2 and a motor 3 arranged in a cylindrical (pot-shaped) housing
Hydraulikaggregat 1 ein Steuergerät 4 mit einem elektrischen Steckanschluss 6 (vgl. Figur 2). Im Steuergerät 4 ist ein Drehratensensor 5 integriert. Im Gehäuse 2 des Hydraulikaggregats ist die Pumpe sowie Ventile, Drosseln, Leitungsanschlüsse und weitere hydraulische Einrichtungen zur Bereitstellung der hydraulischen Funktionen angeordnet.Hydraulic unit 1, a control unit 4 with an electrical plug connection 6 (see FIG. 2). A rotation rate sensor 5 is integrated in the control unit 4. The pump and valves, throttles, line connections and other hydraulic devices for providing the hydraulic functions are arranged in the housing 2 of the hydraulic unit.
Wie insbesondere aus Figur 2 ersichtlich ist, ist das Hydraulikaggregat 1 über drei Befestigungspunkte 7, 8, 9 an einer Halterung 10 befestigt. Wie aus Figur 1 ersichtlich ist, ist die Halterung 10 im Wesentlichen aus U-förmig angeordneten Blechen gebildet. Die Halterung 10 ist selbst an einem anderen Bauteil eines Fahrzeugs befestigt, was aus Übersichtlichkeitsgründen in den Figuren nicht dargestellt ist. Zur Dämpfung von Körperschall, welcher durch den Betrieb des Motors 2 und durch Schaltvorgänge in der Hydraulik entstehen kann, sind zwischen dem Gehäuse 2 und der Halterung 10 Dämpfungselemente 11 zum Dämpfen und Absorbieren des Körperschalls angeordnet.As can be seen in particular from FIG. 2, the hydraulic unit 1 is fastened to a holder 10 via three fastening points 7, 8, 9. As can be seen from FIG. 1, the holder 10 is essentially formed from sheets arranged in a U-shape. The holder 10 is itself attached to another component of a vehicle, which is not shown in the figures for reasons of clarity. For damping structure-borne noise, which can arise from the operation of the motor 2 and through switching processes in the hydraulics, 10 damping elements 11 for damping and absorbing the structure-borne noise are arranged between the housing 2 and the holder.
Wie insbesondere aus Figur 1 ersichtlich ist, bilden die drei Befestigungspunkte 7, 8, 9 eine Ebene E. In dieser Ebene E ist der GesamtSchwerpunkt S des Hydraulikaggregats, umfassend das Gehäuse 2, den Motor 3 und das Steuergerät 4, angeordnet. Diese Anordnung des Schwerpunkts in der Ebene E der Befestigungspunkte 7, 8, 9 minimiert Torsionsbewegungen des Hydraulikaggregats 1, so dass es möglich ist, am Hydraulikaggregat 1 einen Drehratensensor 5 anzuordnen. Somit wird erfindungsgemäß eine signifikante Reduzierung von Störsignalen im Nutzband des Drehratensensors erreicht. Die Dämpfungselemente 11 werden hinsichtlich ihrer Steifigkeit und sonstigen physikalischen Parametern so ausgewählt, dass ein Optimum aus möglichst hoher Resonanzfrequenz und möglichst niedriger Resonanzüberhöhung einerseits und geringen Geräuschen andererseits erreicht wird. Die für die Aufhängung des Hydraulikaggregats 1 verwendete Halterung 10 muss ihrerseits selbst möglichst steif sein, um nicht selbst Resonanzerscheinungen im niedrigen Frequenzbereich, insbesondere bis 50 Hz, aufzuweisen. Zur Versteifung sind deshalb in den Ecken dreieckige Versteifungselemente 15 angeordnet.As can be seen in particular from FIG. 1, the three fastening points 7, 8, 9 form a plane E. In this plane E, the overall center of gravity S of the hydraulic unit, including the housing 2, the motor 3 and the control unit 4, is arranged. This arrangement of the center of gravity in the plane E of the fastening points 7, 8, 9 minimizes torsional movements of the hydraulic unit 1, so that it is possible to arrange a rotation rate sensor 5 on the hydraulic unit 1. Thus, according to the invention, a significant reduction in interference signals in the useful band of the rotation rate sensor is achieved. The damping elements 11 are selected with regard to their stiffness and other physical parameters in such a way that an optimum is achieved from the highest possible resonance frequency and the lowest possible resonance increase on the one hand and low noise on the other hand. The for the The suspension 10 of the hydraulic unit 1 used must itself be as rigid as possible in order not to have resonance phenomena in the low frequency range, in particular up to 50 Hz. Triangular stiffening elements 15 are therefore arranged in the corners for stiffening.
Wie aus Figur 2 ersichtlich ist, sind am Gehäuse 2 des Hydraulikaggregats 1 an einer Seitenfläche weitere Befestigungspunkte 12, 13, 14 vorgesehen. Auch an der nicht dargestellten, gegenüberliegenden Seite sind weitere Befestigungspunkte angeordnet. Dieses Vorsehen einer Vielzahl von Befestigungspunkten an allen Seitenflächen des Gehäuses 2 ermöglicht es, dass das Hydraulikaggregat 1 als Standardbauteil für unterschiedliche Fahrzeughersteller hergestellt werden kann, welche ihrerseits eine entsprechende Halterung entsprechend den in ihrem Motorraum oder Unterboden vorhandenen geometrischen Abmessungen konstruieren können. Alle Befestigungspunkte sind dabei derart angeordnet, dass bei Auswahl von drei Befestigungspunkten der Vielzahl von Befestigungspunkten immer eine Ebene aufgespannt wird, welche entweder den Schwerpunkt S enthält oder nahe am Schwerpunkt S aufgespannt ist. Dadurch kann insbesondere die Variantenzahl für das Hydraulikaggregat verringert werden und somit die Herstellungskosten signifikant gesenkt werden.As can be seen from FIG. 2, further fastening points 12, 13, 14 are provided on the housing 2 of the hydraulic unit 1 on one side surface. Further fastening points are also arranged on the opposite side, not shown. This provision of a large number of fastening points on all side surfaces of the housing 2 makes it possible for the hydraulic unit 1 to be produced as a standard component for different vehicle manufacturers, who in turn can construct a corresponding holder in accordance with the geometric dimensions present in their engine compartment or underbody. All attachment points are arranged in such a way that when three attachment points are selected from the plurality of attachment points, one plane is always spanned, which plane either contains the center of gravity S or is spanned close to the center of gravity S. As a result, in particular the number of variants for the hydraulic unit can be reduced and the manufacturing costs can thus be significantly reduced.
Es sei angemerkt, dass auch weitere Sensorvorrichtungen, wie beispielsweise ein Beschleunigungssensor zur Erfassung einer Beschleunigung bzw. einer Verzögerung, am Hydraulikaggregat bzw. in das Steuergerät 4 integriert werden können.It should be noted that further sensor devices, such as an acceleration sensor for detecting an acceleration or a deceleration, can also be integrated on the hydraulic unit or in the control unit 4.
Das erfindungsgemäße Hydraulikaggregat 1 wird insbesondere bei elektronischen Stabilitätssystemen und bei elektrohydraulischen Bremssystemen verwendet. Durch die Anordnung des Drehratensensors 5 im Steuergerät 4 verringern sich somit auch die Montagekosten für derartige Systeme, da im Stand der Technik bisher die Sensoren stets separat am Fahrzeug montiert werden mussten. Durch die erfindungsgemäße Anordnung der Befestigungspunkte ist es somit erstmals möglich, Sensorvorrichtungen unmittelbar in das Hydraulikaggregat und insbesondere in das Steuergerät zu integrieren. The hydraulic unit 1 according to the invention is used in particular in the case of electronic stability systems and electro-hydraulic brake systems used. The arrangement of the rotation rate sensor 5 in the control unit 4 thus also reduces the assembly costs for such systems, since in the prior art the sensors had always had to be mounted separately on the vehicle. The arrangement of the fastening points according to the invention makes it possible for the first time to integrate sensor devices directly into the hydraulic unit and in particular into the control unit.

Claims

Ansprüche Expectations
1. Hydraulikaggregat, umfassend eine hydraulische Einheit (2, 3), ein Steuergerät (4) und eine Sensorvorrichtung (5) , wobei das Hydraulikaggregat wenigstens drei Befestigungspunkte (7, 8, 9) zur Befestigung an einer Halterung (10) aufweist und die Befestigungspunkte (7, 8, 9) eine Ebene (E) aufspannen, welche nahe einem Schwerpunkt (S) des Hydraulikaggregats angeordnet ist.1. Hydraulic unit comprising a hydraulic unit (2, 3), a control unit (4) and a sensor device (5), the hydraulic unit having at least three fastening points (7, 8, 9) for fastening to a holder (10) and Fixing points (7, 8, 9) span a plane (E), which is located near a center of gravity (S) of the hydraulic unit.
2. Hydraulikaggregat nach Anspruch 1, dadurch gekennzeichnet, dass die Ebene (E) maximal 10 mm vom Schwerpunkt (S) des Hydraulikaggregats entfernt aufgespannt ist.2. Hydraulic unit according to claim 1, characterized in that the plane (E) is spanned a maximum of 10 mm from the center of gravity (S) of the hydraulic unit.
3. Hydraulikaggregat nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Schwerpunkt (S) des Hydraulikaggregats in der Ebene (E) liegt.3. Hydraulic unit according to one of the preceding claims, characterized in that the center of gravity (S) of the hydraulic unit is in the plane (E).
4. Hydraulikaggregat nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein Gehäuse (2) der hydraulischen Einheit mehrere Seitenflächen aufweist und die Befestigungspunkte (7, 8, 9) an zwei einander gegenüberliegenden Seitenflächen des Gehäuses (2) angeordnet sind.4. Hydraulic unit according to one of the preceding claims, characterized in that a housing (2) of the hydraulic unit has a plurality of side surfaces and the fastening points (7, 8, 9) on two opposite side surfaces of the housing (2) are arranged.
5. Hydraulikaggregat nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Befestigungspunkte (7, 8, 9, 12, 13, 14) an zwei einander benachbarten Seitenflächen des Gehäuses (2) angeordnet sind.5. Hydraulic unit according to one of claims 1 to 3, characterized in that the fastening points (7, 8, 9, 12, 13, 14) are arranged on two adjacent side faces of the housing (2).
6. Hydraulikaggregat nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass an einer Seitenfläche des Gehäuses (2) jeweils genau ein Befestigungspunkt angeordnet ist.6. Hydraulic unit according to one of claims 1 to 3, characterized in that exactly one fastening point is arranged on a side surface of the housing (2).
7. Hydraulikaggregat nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Hydraulikaggregat vier oder mehr Befestigungspunkte umfasst.7. Hydraulic unit according to one of the preceding claims, characterized in that the hydraulic unit comprises four or more fastening points.
8. Hydraulikaggregat nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Sensorvorrichtung (5) in das Steuergerät (4) integriert ist.8. Hydraulic unit according to one of the preceding claims, characterized in that the sensor device (5) in the control unit (4) is integrated.
9. Hydraulikaggregat nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Sensorvorrichtung (5) ein Inertialsensor, insbesondere ein Drehratensensor und/oder wenigstens ein Beschleunigungssensor ist.9. Hydraulic unit according to one of the preceding claims, characterized in that the sensor device (5) is an inertial sensor, in particular a rotation rate sensor and / or at least one acceleration sensor.
10. Verwendung eines Hydraulikaggregats nach einem der Ansprüche 1 bis 9 in einem Fahrdynamikregelungssystem und/oder einem elektrohydraulischen Bremssystem für Fahrzeuge. 10. Use of a hydraulic unit according to one of claims 1 to 9 in a vehicle dynamics control system and / or an electro-hydraulic brake system for vehicles.
PCT/DE2004/002042 2003-10-10 2004-09-14 Hydraulic power unit comprising an integrated sensor device WO2005039946A1 (en)

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