DE102006049793A1 - Suspension system for motor vehicle, has conveying aggregate provided with engine pump unit, whose delivery flow is arbitrarily adjustable for variation of amount of liquid within hydraulic cylinder using current less open and closed valves - Google Patents

Suspension system for motor vehicle, has conveying aggregate provided with engine pump unit, whose delivery flow is arbitrarily adjustable for variation of amount of liquid within hydraulic cylinder using current less open and closed valves Download PDF

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Publication number
DE102006049793A1
DE102006049793A1 DE200610049793 DE102006049793A DE102006049793A1 DE 102006049793 A1 DE102006049793 A1 DE 102006049793A1 DE 200610049793 DE200610049793 DE 200610049793 DE 102006049793 A DE102006049793 A DE 102006049793A DE 102006049793 A1 DE102006049793 A1 DE 102006049793A1
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Germany
Prior art keywords
valves
suspension system
hydraulic cylinder
pump
pump unit
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DE200610049793
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German (de)
Inventor
Wilhelm Beer
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Continental Teves AG and Co OHG
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Continental Teves AG and Co OHG
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Priority to DE200610049793 priority Critical patent/DE102006049793A1/en
Publication of DE102006049793A1 publication Critical patent/DE102006049793A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
    • B60G17/016—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input
    • B60G17/0162—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input mainly during a motion involving steering operation, e.g. cornering, overtaking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
    • B60G17/027—Mechanical springs regulated by fluid means
    • B60G17/0272—Mechanical springs regulated by fluid means the mechanical spring being a coil spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
    • B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
    • B60G17/056—Regulating distributors or valves for hydropneumatic systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
    • B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
    • B60G21/06—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected fluid
    • B60G21/067—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected fluid between wheels on different axles on the same side of the vehicle, i.e. the left or the right side
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
    • B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
    • B60G21/06—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected fluid
    • B60G21/073—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected fluid between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/40—Type of actuator
    • B60G2202/41—Fluid actuator
    • B60G2202/413—Hydraulic actuator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/80—Interactive suspensions; arrangement affecting more than one suspension unit
    • B60G2204/81—Interactive suspensions; arrangement affecting more than one suspension unit front and rear unit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/80—Interactive suspensions; arrangement affecting more than one suspension unit
    • B60G2204/83—Type of interconnection
    • B60G2204/8304—Type of interconnection using a fluid

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

The system has a conveying aggregate provided with an engine pump unit (5), whose delivery flow is arbitrarily adjustable for variation of amount of liquid within a hydraulic cylinder (6) using current less open valves (1, 3) and current less closed valves (2, 4) e.g. 2/ 2-way seat valve. The conveying direction of the engine pump unit is changed based on operating sequence of the valves. The valves are arranged in a bridge circuit on a suction side of a pump and at a pressure side of the pump. The seat valve is electromagnetically switchable into its closed or opened reversal position.

Description

Die Erfindung betrifft ein Federungssystem für Kraftfahrzeuge nach dem Oberbegriff des Patentanspruchs 1.The The invention relates to a suspension system for motor vehicles according to the preamble of claim 1

Aus der DE 42 31 641 A1 ist bereits ein Federungssystem für Kraftfahrzeuge bekannt, mit einer zwischen den Fahrzeugrädern und dem Fahrzeugaufbau wirksamen Feder- und Hydraulikzylinderanordnung und mit einem hydraulischen Förderaggregat, welches zur Kompensation, ggf. auch zur Überkompensation bzw. zur Minderung von Nick- und/oder auch Wankbewegungen oder Schräglagen des Fahrzeugaufbaus eine Flüssigkeitsmenge innerhalb in der Hydraulikzylinderanordnung verändert.From the DE 42 31 641 A1 is already known a suspension system for motor vehicles, with an effective between the vehicle wheels and the vehicle body spring and hydraulic cylinder assembly and with a hydraulic delivery unit, which for compensation, possibly also for overcompensation or to reduce pitching and / or rolling movements or inclinations the vehicle body changes an amount of liquid within the hydraulic cylinder assembly.

Das Förderaggregat besteht aus einem Gehäuse, in dem ein die Nickbewegung des Kraftfahrzeugs beeinflussender erster Stufenkolben und ein die Wankbewegung des Fahrzeugs beeinflussender zweiter Stufenkolben hydraulisch beaufschlagt werden. Zur Verdrängung der jeweils in den Zylindern der beiden Stufenkolben befindlichen Flüssigkeit in die zwischen dem Fahrzeugaufbau und den Fahrzeugrädern angeordneten Hydraulikzylindern werden Stellaggregate benötigt, die unter anderem abhängig von Signalen eines Dämpfer- und Lagereglers eine entsprechende Betätigung der Stufenkolben bewirken. Das Förderaggregat ist somit mit verhältnismäßig großem Aufwand als hydrostatisches System konzipiert, wodurch die möglichen Regelfunktionen beschränkt sind.The delivery unit consists of a housing, in which a nichir movement of the motor vehicle influencing first Stepped piston and the rolling motion of the vehicle influencing second Stepped pistons are acted upon hydraulically. For the suppression of each located in the cylinders of the two stepped piston liquid arranged in between the vehicle body and the vehicle wheels Hydraulic cylinders Stellaggregate needed, among other things depending on Signals of a damper and Position controller effect a corresponding actuation of the stepped piston. The delivery unit is thus with relatively great effort designed as a hydrostatic system, whereby the possible Control functions limited are.

Daher ist es die Aufgabe der Erfindung, ein Federungssystem der eingangs genannten Art derart zu verbessern, dass mit möglichst geringem Aufwand hochdynamische Regelvorgänge möglich sind, wobei außer einer Beeinflussung der Nick- und Wankbewegung als zusätzliche Funktion eine Niveauregelung ermöglicht werden soll.Therefore It is the object of the invention, a suspension system of the beginning mentioned type to improve such that with the least possible effort highly dynamic control processes possible are, except where an influence on the pitching and rolling motion as additional Function allows a level control shall be.

Diese Aufgabe wird erfindungsgemäß für ein Elektromagnetventil der angegebenen Art mit den kennzeichnenden Merkmalen des Patentanspruchs 1 gelöst.These Task is according to the invention for a solenoid valve the specified type with the characterizing features of claim 1 solved.

Weitere Merkmale und Vorteile der Erfindung gehen aus den nachfolgenden Beschreibungen eines Ausführungsbeispiels für ein verbessertes Federungssystems hervor.Further Features and advantages of the invention will become apparent from the following Descriptions of an embodiment for a improved suspension system.

Es zeigen:It demonstrate:

1 einen Längsschnitt durch die Feder- und Hydraulikzylinderanordnung eines Federbeins, 1 a longitudinal section through the spring and hydraulic cylinder assembly of a shock absorber,

2, 3 jeweils einen Hydraulikschaltplan zur Verdeutlichung der Ventilfunktionsweise innerhalb eines zwischen zwei Hydraulikzylindern angeordneten Förderaggregats, 2 . 3 in each case a hydraulic circuit diagram for clarifying the valve operating mode within a delivery unit arranged between two hydraulic cylinders,

4 eine Prinzipskizze zum hydraulischen Anschluss des Förderaggregats an zwei Hydraulikzylinder der Fahrzeugvorderachse, 4 a schematic diagram of the hydraulic connection of the delivery unit to two hydraulic cylinders of the vehicle front axle,

5 eine Prinzipskizze zum hydraulischen Anschluss des mit zwei Pumpenkreisen versehenen Förderaggregats an die Hydraulikzylinder der Fahrzeugvorderachse und Fahrzeughinterachse. 5 a schematic diagram of the hydraulic connection of the delivery unit provided with two pump circuits to the hydraulic cylinder of the vehicle front axle and vehicle rear axle.

Die 1 zeigt teilweise eine zwischen den Fahrzeugrädern und dem Fahrzeugaufbau Kraftfahrzeugs angeordnetes Federbein im Längsschnitt, bestehend aus einer Feder- und Hydraulikzylinderanordnung, das mit einem noch näher zu erläuternden hydrodynamischem Förderaggregat verbunden ist, um eine Minderung von Nick- und/oder auch Wankbewegungen oder Schräglagen des Fahrzeugaufbaus sowie eine Höhenregulierung des Fahrzeugaufbaus zu ermöglichen.The 1 shows partially arranged between the vehicle wheels and the vehicle body vehicle suspension strut in longitudinal section, consisting of a spring and hydraulic cylinder assembly, which is connected to an even closer to be explained hydrodynamic delivery unit to a reduction of pitching and / or rolling movements or inclinations of the vehicle body and to allow height adjustment of the vehicle body.

Hierzu geht im Detail aus 1 der Aufbau des Federbeins 13 hervor, dessen Federteller 12 mit einem höhenverstellbaren Hydraulikzylinder 6 verbunden ist, der entlang dem Federbein 13 geführt und gedichtet ist. Zwischen dem Federteller 12 und einem nicht dargestellten unteren Abschnitt des Federbeins 13 ist eine Tragfeder 14 angeordnet, die abhängig von der Position des Federtellers 12 durch die Veränderung der Federvorspannlänge mehr oder weniger vorgespannt ist.This goes into detail 1 the structure of the strut 13 forth, whose spring plate 12 with a height-adjustable hydraulic cylinder 6 connected along the strut 13 is guided and sealed. Between the spring plate 12 and a lower portion of the strut, not shown 13 is a suspension spring 14 arranged, which depends on the position of the spring plate 12 is biased more or less by the change of the spring preload length.

Oberhalb des Federtellers 12 ragt das rohrförmige Ende des Federbeins 13 hervor, das mit einem Druckleitungsanschluss 15 versehen ist, der zum Förderaggregat führt. Über den Druckleitungsanschluss 15 besteht eine Verbindung mit der Arbeitskammer 16 des Hydraulikzylinders 6, sodass dieser stufenlos hydraulisch verstellbar ist. Unterhalb des Druckleitungsanschluss 15 befindet sich eine Befestigungsplatte 17 am rohrförmigen Ende des Federbeins 13, die mit Fahrzeugaufbau 18 verschraubt ist. Dies soweit zum Aufbau und zum Verständnis der am Federbein 13 montierten Feder- und Hydraulikzylinderanordnung.Above the spring plate 12 protrudes the tubular end of the strut 13 It comes with a pressure line connection 15 is provided, which leads to the delivery unit. Via the pressure line connection 15 there is a connection with the working chamber 16 of the hydraulic cylinder 6 so that it is steplessly hydraulically adjustable. Below the pressure line connection 15 there is a mounting plate 17 at the tubular end of the strut 13 that with vehicle construction 18 is screwed. This as far as the construction and understanding of the strut 13 mounted spring and hydraulic cylinder assembly.

Nachfolgend wird anhand den 2, 3 die Funktionsweise und der prinzipielle Aufbau des Förderaggregats beschrieben, das gemäß der Erfindung aus einer Motorpumpeneinheit 5 besteht, dessen Förderstrom zwecks Variation der Flüssigkeitsmenge innerhalb des bereits konstruktiv in 1 darge stellten Hydraulikzylinders 6 mittels mehrerer Ventile 1, 2, 3, 4 beliebig einstellbar ist, wozu in Abhängigkeit von der Schaltfolge der Ventile 1, 2, 3, 4 die Förderrichtung der Motorpumpeneinheit 5 nach Wunsch oder Bedarf veränderbar ist.The following is based on the 2 . 3 describes the operation and the basic structure of the delivery unit, according to the invention of a motor pump unit 5 exists whose flow for the purpose of varying the amount of liquid within the already constructive in 1 Darge presented hydraulic cylinder 6 by means of several valves 1 . 2 . 3 . 4 is arbitrarily adjustable, including depending on the switching sequence of the valves 1 . 2 . 3 . 4 the conveying direction of the motor pump unit 5 is changeable as desired or required.

Jeder zwischen dem Fahrzeugaufbau und den Fahrzeugrädern angeordnete Hydraulikzylinder 6 ist paarweise über einen geschlossenen Pumpenförderkreis 7, der jeweils vier Ventile 1, 2, 3, 4 aufweist, mit der Motorpumpeneinheit 5 verbunden. Um den Förderstrom reversieren zu können, sind die vier Ventile 1, 2, 3, 4 in einer Brückenschaltung angeordnet, wobei die an der Pumpensaugseite angeordneten Ventilpaare 1, 4 ebenso wie die an der Pumpendruckseite angeordneten Ventilpaare 2, 3 aus jeweils einem stromlos offen Ventil 1, 3 und einem stromlos geschlossen Ventil 1, 2 bestehen.Everyone between the vehicle body and the hydraulic wheels arranged on the vehicle wheels 6 is in pairs via a closed pump conveyor 7 , each of four valves 1 . 2 . 3 . 4 having, with the motor pump unit 5 connected. To be able to reverse the flow, the four valves 1 . 2 . 3 . 4 arranged in a bridge circuit, wherein the arranged on the pump suction side valve pairs 1 . 4 as well as arranged on the pump pressure side valve pairs 2 . 3 each from a normally open valve 1 . 3 and a normally closed valve 1 . 2 consist.

Die vier Ventile 1, 2, 3, 4 sind als 2/2-Wegesitzventile ausgeführt, die je nach erwünschter Förderrichtung elektromagnetisch in ihre geschlossene oder geöffnete Umkehrstellung schaltbar sind. Infolge des geschlossenen Pumpenförderkreises 7 ist die Schaltung der Ventile 1, 2, 3, 4 derart gewählt, dass die Flüssigkeitsaufnahme in einem der paarweise verwendeten Hydraulikzylinder 6 der Flüssigkeitsabnahme im korrespondierenden Hydraulikzylinder 6 entspricht.The four valves 1 . 2 . 3 . 4 are designed as 2/2-way seat valves, which are electromagnetically switched depending on the desired conveying direction in its closed or open reversing position. As a result of the closed pump conveyor circuit 7 is the circuit of the valves 1 . 2 . 3 . 4 chosen such that the fluid intake in one of the paired hydraulic cylinder 6 the liquid decrease in the corresponding hydraulic cylinder 6 equivalent.

Die 2 zeigt die vier Ventile 1, 2, 3, 4 in ihrer elektromagnetisch nicht erregten Grundstellung, wodurch mit dem Anlaufen der Hydraulikpumpe 9 ausschließlich aus dem rechts abgebildeten Hydraulikzylinder 6 Hydraulikvolumen über das pumpensaugseitig in Grundstellung geöffnete Ventil 1 zur Hydraulikpumpe 9 gelangt und pumpendruckseitig über das in Grundstellung geöffnete Ventil 3 in den links abgebildeten Hydraulikzylinder 6 gefördert wird, während die Ventile 2, 4 in ihrer geschlossenen Grundstellung verharren, wodurch das Ventil 4 den linken Hydraulikzylinder 6 von der Pumpensaugseite sowie das Ventil 2 die Pumpendruckseite vom rechten Hydraulikzylinder 6 trennt.The 2 shows the four valves 1 . 2 . 3 . 4 in their non-energized electromagnetic position, causing the start of the hydraulic pump 9 exclusively from the hydraulic cylinder pictured on the right 6 Hydraulic volume via the pump suction side opened in basic position valve 1 to the hydraulic pump 9 passes and pump pressure side via the open in the basic position valve 3 in the hydraulic cylinder shown on the left 6 is promoted while the valves 2 . 4 remain in their closed basic position, causing the valve 4 the left hydraulic cylinder 6 from the pump suction side as well as the valve 2 the pump pressure side from the right hydraulic cylinder 6 separates.

Unter Beachtung des aus 1 bekannten Federbeinaufbaus bewegt sich nach 2 zwangsläufig der am rechten Hydraulikzylinder 6 angebrachte Federteller nach oben und der Federteller des linken Hydraulikzylinders 6 nach unten. Die beiden Grenzlagen des Federtellers 12 sich strichliniert gleichfalls aus 1 ersichtlich.In compliance with the 1 known strut construction moves after 2 inevitably the right hydraulic cylinder 6 attached spring plate up and the spring plate of the left hydraulic cylinder 6 downward. The two extreme positions of the spring plate 12 It also strikes out 1 seen.

Abweichend von 2 zeigt die 3 eine Umkehrung des Pumpenstroms vom linken Hydraulikzylinder 6 zum rechten Hydraulikzylinder 6, da die in Grundstellung geöffneten Ventile 1, 3 nunmehr elektromagnetisch geschlossen und die in Grundstellung normalerweise geschlossenen Ventile 2, 4 nunmehr geöffnet sind, sodass vorteilhaft auf eine Drehrichtungsumkehrbarkeit der Hydraulikpumpe verzichtet werden kann.Deviating from 2 show the 3 a reversal of the pump current from the left hydraulic cylinder 6 to the right hydraulic cylinder 6 because the valves opened in the basic position 1 . 3 now electromagnetically closed and normally closed in the normal position valves 2 . 4 are now open, so advantageously can be dispensed with reversing the direction of rotation of the hydraulic pump.

Schließlich zeigen die 4, 5 zwei Prinzipskizzen zum hydraulischen Anschluss der Motorpumpeneinheit 5 an die Hydraulikzylinder 6 einer als auch zweier Fahrzeugachsen. Innerhalb des schemenhaft skizzierten Gehäuses 11 der Motorpumpeneinheit 5 sind sowohl die vier erforderlichen Ventile 1, 2, 3, 4 als auch die von einem Elektromotor 10 antreibbare Hydraulikpumpe 9 integriert.Finally, the show 4 . 5 Two schematic diagrams for the hydraulic connection of the motor pump unit 5 to the hydraulic cylinders 6 one as well as two vehicle axles. Within the shadowy outlined housing 11 the motor pump unit 5 are both the four required valves 1 . 2 . 3 . 4 as well as that of an electric motor 10 drivable hydraulic pump 9 integrated.

Gemäß dem Ausführungsbeispiel nach 4 weist die Motorpumpeneinheit 5 lediglich einen Pumpenförderkreis auf, der beispielhaft an den beiden Hydraulikzylindern 6 der Fahrzeugvorderachse VL, VR angeschlossen ist.According to the embodiment according to 4 indicates the motor pump unit 5 only a pump conveyor on the example of the two hydraulic cylinders 6 the vehicle front axle VL, VR is connected.

Hingegen weist nach der 5 die Motorpumpeneinheit 5 zur Niveau- und Wankstabilisierung zwei Pumpenförderkreise 7, 8 auf, wovon der eine Pumpenförderkreis 7 beispielhaft an den beiden Hydraulikzylindern 6 der Fahrzeugvorderachse VR, VL und der zweite Pumpenförderkreis 8 beispielhaft an den Hydraulikzylindern 6 der Fahrzeughinterachse HR, HL angeschlossen ist.On the other hand, according to the 5 the motor pump unit 5 for level and roll stabilization two pump conveyor circuits 7 . 8th on which of which is a pump conveyor 7 by way of example on the two hydraulic cylinders 6 the vehicle front axle VR, VL and the second pump conveyor 8th by way of example on the hydraulic cylinders 6 the vehicle rear axle HR, HL is connected.

Bei Wunsch oder Bedarf lassen sich in Verbindung mit der vorgestellten Motor-Pumpeneinheit 5 die Hydraulikzylinder 6 als eigenständig handhabbare Nachrüstteile relativ einfach an den Federbeinen 13 nachrüsten, sofern eine serienmäßige Anordnung nicht vorgesehen ist.If required or required, it can be combined with the motor pump unit presented 5 the hydraulic cylinders 6 as independently operable retrofit parts relatively easy on the spring struts 13 retrofit, provided that a standard arrangement is not provided.

Aus den vorangegangenen prinzipiellen Erläuterungen zum Aufbau und zur Wirkungsweise der mit den Hydraulikzylindern 6 verbundenen Motorpumpeneinheit 5 lassen sich mit verhältnismäßig geringem baulichen Aufwand die gewünschten Lageregelmechanismen für einen Fahrzeugaufbau dynamisch und präzise darstellen.From the previous general explanations to the structure and operation of the hydraulic cylinders 6 connected motor pump unit 5 can be with relatively little construction effort, the desired position control mechanisms for a vehicle body dynamically and accurately represent.

11
VentilValve
22
VentilValve
33
VentilValve
44
VentilValve
55
MotorpumpeneinheitMotor pump unit
66
Hydraulikzylinderhydraulic cylinders
77
Pumpenförderkreispump delivery
88th
Pumpenförderkreispump delivery
99
Hydraulikpumpehydraulic pump
1010
Elektromotorelectric motor
1111
Gehäusecasing
1212
Federtellerspring plate
1313
Federbeinstrut
1414
Tragfedersuspension spring
1515
DruckleitungsanschlussPressure pipe connection
1616
Arbeitskammerworking chamber
1717
Befestigungsplattemounting plate
1818
Fahrzeugaufbauvehicle body

Claims (8)

Federungssystem für Kraftfahrzeuge, mit einer zwischen den Fahrzeugrädern und dem Fahrzeugaufbau wirksamen Feder- und Hydraulikzylinderanordnung, mit einem hydraulischen Förderaggregat, welches zur Kompensation, ggf. auch zur Überkompensation bzw. zur Minderung von Nick- und/oder auch Wankbewegungen oder Schräglagen des Fahrzeugaufbaus eine Flüssigkeitsmenge innerhalb eines Hydraulikzylinders zu verändern vermag, dadurch gekennzeichnet, dass das Förderaggregat eine Motorpumpeneinheit (5) aufweist, dessen Förderstrom zur Variation der Flüssigkeitsmenge innerhalb des Hydraulikzylinders (6) mittels mehrerer Ventile (1, 2, 3, 4) beliebig einstellbar ist.Suspension system for motor vehicles, with one between the vehicle wheels and the vehicle Construction effective spring and hydraulic cylinder assembly, with a hydraulic delivery unit, which for compensation, possibly also to overcompensation or to reduce pitching and / or rolling movements or inclinations of the vehicle body is able to change a liquid amount within a hydraulic cylinder, characterized in that the delivery unit a motor pump unit ( 5 ), whose flow rate for varying the amount of liquid within the hydraulic cylinder ( 6 ) by means of several valves ( 1 . 2 . 3 . 4 ) is arbitrarily adjustable. Federungssystem nach Anspruch 1, dadurch gekennzeichnet, dass in Abhängigkeit der Schaltfolge der Ventile (1, 2, 3, 4) die Förderrichtung der Motorpumpeneinheit (5) veränderbar ist.Suspension system according to claim 1, characterized in that in dependence of the switching sequence of the valves ( 1 . 2 . 3 . 4 ) the conveying direction of the motor pump unit ( 5 ) is changeable. Federungssystem nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Hydraulikzylinder (6) paarweise über einen geschlossenen Pumpenförderkreis (7), der insgesamt vier Ventile (1, 2, 3, 4) aufweist, mit der Motorpumpeneinheit (5) verbunden sind.Suspension system according to claim 1 or 2, characterized in that the hydraulic cylinders ( 6 ) in pairs via a closed pump conveyor ( 7 ), the total of four valves ( 1 . 2 . 3 . 4 ), with the motor pump unit ( 5 ) are connected. Federungssystem nach Anspruch 3, dadurch gekennzeichnet, dass die vier Ventile (1, 2, 3, 4) in einer Brückenschaltung angeordnet sind, wobei die beiden an der Pumpensaugseite angeordneten Ventilpaare (1, 4) ebenso wie die an der Pumpendruckseite angeordneten Ventilpaare (2, 3) aus jeweils einem stromlos offen Ventil (1, 3) und einem stromlos geschlossen Ventil (1, 2) bestehen.Suspension system according to claim 3, characterized in that the four valves ( 1 . 2 . 3 . 4 ) are arranged in a bridge circuit, wherein the two arranged on the pump suction side valve pairs ( 1 . 4 ) as well as arranged on the pump pressure side valve pairs ( 2 . 3 ) from one normally open valve ( 1 . 3 ) and a normally closed valve ( 1 . 2 ) consist. Federungssystem nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die Ventile (1, 2, 3, 4) vorzugsweise als 2/2-Wegesitzventile ausgeführt sind, die elektromagnetisch in ihre geschlossene oder geöffnete Umkehrstellung schaltbar sind.Suspension system according to one of the preceding claims, characterized in that the valves ( 1 . 2 . 3 . 4 ) are preferably designed as 2/2-way seat valves, which are electromagnetically switchable in their closed or opened reversing position. Federungssystem nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die Motorpumpeneinheit (5) zweikreisig ausgebildet ist, sodass die paarweise den Fahrzeugvorder- und hinterrädern (VL, VR, HL, VR) zugeordneten Hydraulikzylinder (6) über zwei voneinander unabhängige Pumpenförderkreise (7, 8) hydraulisch regulierbar sind.Suspension system according to one of the preceding claims, characterized in that the motor pump unit ( 5 ) is designed in a double-circle, so that in pairs the vehicle front and rear wheels (VL, VR, HL, VR) associated hydraulic cylinder ( 6 ) via two independent pump conveyor circuits ( 7 . 8th ) are hydraulically adjustable. Federungssystem nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass infolge des geschlossenen Pumpenförderkreises (7, 8) die Schaltung der Ventile (1, 2, 3, 4) derart gewählt ist, dass die Flüssigkeitsaufnahme in einem der verwendeten Hydraulikzylinder (6) der Flüssigkeitsabnahme im korrespondierenden Hydraulikzylinder (6) entspricht.Suspension system according to one of the preceding claims, characterized in that due to the closed pump conveyor ( 7 . 8th ) the circuit of the valves ( 1 . 2 . 3 . 4 ) is selected such that the liquid absorption in one of the hydraulic cylinders used ( 6 ) the liquid decrease in the corresponding hydraulic cylinder ( 6 ) corresponds. Federungssystem nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, dass die vier Ventile (1, 2, 3, 4) innerhalb eines Gehäuses (11) der Motorpumpeneinheit (5) integriert sind, in dem auch die von einem Elektromotor (10) antreibbare Hydraulikpumpe (9) integriert ist.Suspension system according to one of the preceding claims, characterized in that the four valves ( 1 . 2 . 3 . 4 ) within a housing ( 11 ) of the motor pump unit ( 5 ) are integrated, in which also by an electric motor ( 10 ) drivable hydraulic pump ( 9 ) is integrated.
DE200610049793 2006-10-21 2006-10-21 Suspension system for motor vehicle, has conveying aggregate provided with engine pump unit, whose delivery flow is arbitrarily adjustable for variation of amount of liquid within hydraulic cylinder using current less open and closed valves Withdrawn DE102006049793A1 (en)

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