DE4100503A1 - Tensioner device for chain or belt drives - uses engine oil pressure to reduce mechanical tension spring force - Google Patents

Tensioner device for chain or belt drives - uses engine oil pressure to reduce mechanical tension spring force

Info

Publication number
DE4100503A1
DE4100503A1 DE19914100503 DE4100503A DE4100503A1 DE 4100503 A1 DE4100503 A1 DE 4100503A1 DE 19914100503 DE19914100503 DE 19914100503 DE 4100503 A DE4100503 A DE 4100503A DE 4100503 A1 DE4100503 A1 DE 4100503A1
Authority
DE
Germany
Prior art keywords
chain
tension spring
engine oil
oil pressure
mechanical tension
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
DE19914100503
Other languages
German (de)
Other versions
DE4100503C2 (en
Inventor
Hans Juergen Dipl Ing Feucht
Roland Dipl Ing Noell
Dirk Dipl Ing Neubauer
Burkhard Dipl Ing Brandner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daimlerchrysler Ag 70567 Stuttgart De Aft Atlas
Original Assignee
Daimler Benz AG
Mercedes Benz AG
AFT Atlas Fahrzeugtechnik 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 Daimler Benz AG, Mercedes Benz AG, AFT Atlas Fahrzeugtechnik GmbH filed Critical Daimler Benz AG
Priority to DE19914100503 priority Critical patent/DE4100503A1/en
Publication of DE4100503A1 publication Critical patent/DE4100503A1/en
Application granted granted Critical
Publication of DE4100503C2 publication Critical patent/DE4100503C2/de
Granted legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
    • F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/0829—Means for varying tension of belts, ropes, or chains with vibration damping means
    • F16H7/0836—Means for varying tension of belts, ropes, or chains with vibration damping means of the fluid and restriction type, e.g. dashpot
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/06—Endless member is a belt
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/08—Endless member is a chain
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0802—Actuators for final output members
    • F16H2007/0806—Compression coil springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0802—Actuators for final output members
    • F16H2007/0812—Fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0889—Path of movement of the finally actuated member
    • F16H2007/0891—Linear path

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

The device is esp. for control - and/or auxiliary appliance drivesey for 16 engines in vehicles. With increasing speed if the drive, the force of a mechanical tension spring is hydraulically reduced by a proportionally rising counter force. The hydraulic counter force results from the engine oil pressure, and is prportional to it. The oil enters a pressure chamber (4) via an inlet throttle (5), and leaves it at a lower pressure via an outlet nozzle (6). The profile of the outlet nozzle decreases with increasing oil temp. USE/ADVANTAGE - Chain as belt drive tensioner in vehicle engine uses oil pressure to reduce loading on mechanical tension spring.

Description

Die Erfindung betrifft eine Spanneinrichtung für Ketten- oder Riementriebe, insbesondere Steuer- und/oder Hilfsaggregate- Triebe, von Kraftfahrzeug-Verbrennungsmotoren nach dem Oberbe­ griff des Patentanspruchs 1.The invention relates to a tensioning device for chain or Belt drives, in particular control and / or auxiliary units Shoots of automotive internal combustion engines according to the Oberbe handle of claim 1.

Eine solche Einrichtung ist aus JP 60-95 247 A. in: Patents Abstracts of Japan, M-417, Sept. 28, 1985, Vol. 9, No. 242 be­ kannt. Bei mit Verbrennungsmotoren verbundenen Kettentrieben soll zur Vermeidung von Kettenrasseln die Kettenspannkraft beim Starten im leerlaufnahen Bereich hoch sein. Bei höheren Motordrehzahlen soll die Spannkraft dagegen geringer werden, um ein sogenanntes Kettenheulen zu verhindern und damit den Verschleiß zu minimieren.Such a device is from JP 60-95 247 A. in: Patents Abstracts of Japan, M-417, Sept. 28, 1985, Vol. 9, No. 242 be knows. For chain drives connected to internal combustion engines to avoid chain rattles the chain tension be high when starting in the area near idle. At higher Engine speeds, on the other hand, should reduce the clamping force, to prevent a so-called chain howl and thus the To minimize wear.

Hiervon ausgehend liegt der Erfindung das Problem zugrunde, die mit zunehmender Geschwindigkeit des Triebes proportional steigende hydraulische Gegenkraft möglichst rationell zu er­ zeugen.Proceeding from this, the invention is based on the problem which is proportional to the increasing speed of the drive increasing hydraulic counterforce as rationally as possible testify.

Erfindungsgemäß wird dies durch eine Ausführung nach dem kenn­ zeichnenden Merkmal des Patentanspruchs 1 erreicht.According to the invention, this is achieved by an embodiment according to the drawing feature of claim 1 achieved.

Den Motoröldruck zur Beaufschlagung der Spanneinrichtung eines mit dem Verbrennungsmotor verbundenen Ketten- oder Riementrie­ bes zu verwenden, ist bereits aus DE-PS 8 49 938, DE-A- 28 19 608 und DE-C-38 24 555 bekannt. Der Schmieröldruck des Motors wird dort allerdings nicht zur Reduzierung der den Ketten­ spanner beaufschlagenden mechanischen Feder, sondern zur zu­ sätzlichen Spannkrafterhöhung bei zunehmender Triebgeschwin­ digkeit eingesetzt. Damit wird dort eine zur erfindungsgemäßen Lehre genau umgekehrte Richtung verfolgt.The engine oil pressure to act on the tensioning device chain or belt drive connected to the internal combustion engine bes to use, is already from DE-PS 8 49 938, DE-A-28 19 608 and DE-C-38 24 555 known. The engine's lubricating oil pressure  is not there to reduce the chains mechanical spring acting on the tensioner, but to additional increase in clamping force with increasing drive speed used. This is one of the invention Teaching followed exactly the opposite direction.

Ein zusätzlicher Aspekt der Erfindung besteht darin, die Hy­ draulikbeaufschlagung der Spanneinrichtung so auszubilden, daß eine gute Dämpfung innerhalb der Spanneinrichtung gegeben ist.An additional aspect of the invention is the Hy to train the tensioning device so that there is good damping within the tensioning device.

Erreicht wird dies durch eine Ausführung des hydraulischen Teils des Spanneinrichtung nach dem Kennzeichen des Anspruchs 2.This is achieved through a design of the hydraulic Part of the clamping device according to the characterizing part of the claim 2nd

Die Lehre des Anspruchs 2 bewirkt, daß eine temperaturbedingte Viskositätsänderung des Motorschmieröles in ihrer Auswirkung auf das jeweils motorbetriebsbedingte Schmieröldruckniveau kompensiert, d. h. neutralisiert, werden kann.The teaching of claim 2 causes a temperature-related Effect of viscosity change of the engine lubricating oil to the lubricating oil pressure level due to engine operation compensated, d. H. can be neutralized.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt, die eine Ketten-Spanneinrichtung im Längsschnitt zeigt.An embodiment of the invention is in the drawing shown a chain tensioner in longitudinal section shows.

Insgesamt besteht die Kettenspanneinrichtung aus einem Gehäuse 1, einem Druckkolben 2, einer Druckfeder 3 sowie einem gedich­ teten hydraulischen Druckraum 4.Overall, the chain tensioning device consists of a housing 1 , a pressure piston 2 , a compression spring 3 and a hydraulic pressure chamber 4 .

Die von der Feder 3 aufgebrachte Druckkraft F wird über den Druckkolben 2 auf eine nicht dargestellte Spannschiene des Kettentriebs übertragen. Durch Beaufschlagung des Druckraumes 4 mit dem Motoröldruck wirkt auf den Druckkolben 3 eine der Federkraft F entgegengerichtete Druckkraft H. Die wirksame Spannkraft P des Druckkolbens 2 ergibt sich aus der Differenz der beiden Kräfte F und H. The pressure force F applied by the spring 3 is transmitted via the pressure piston 2 to a tensioning rail ( not shown) of the chain drive. By acting on the pressure chamber 4 with the engine oil pressure, a pressure force H acts counter to the spring force F on the pressure piston 3. The effective clamping force P of the pressure piston 2 results from the difference between the two forces F and H.

Das Motoröl tritt durch eine Eintrittsdrossel 5 in den Druck­ raum 4 ein und kann diesen über eine Austrittsdrossel 6 wieder verlassen.The engine oil enters through an inlet throttle 5 into the pressure chamber 4 and can leave it via an outlet throttle 6 .

Beim Start des Motors und in dessen leerlaufnahem Bereich sorgt die Federkraft F für eine genügend hohe Vorspannung, um Kettenrasseln zu vermeiden.At the start of the engine and in the area close to idling the spring force F ensures a sufficiently high preload to Avoid chain rattles.

Die Kraft H des Motoröls, die in dem Druckraum 4 der Kraft F der Feder 3 entgegenwirkt, wird durch das Verhältnis der Öff­ nungsquerschnitte der Eintritts- und Austrittsdrosseln 5 und 6 bestimmt.The force H of the engine oil, which counteracts the force F of the spring 3 in the pressure chamber 4 , is determined by the ratio of the opening cross sections of the inlet and outlet throttles 5 and 6 .

Die Austrittsdrossel 6 setzt sich aus einer Drossel 7 mit kon­ stantem Querschnitt und einer Drossel 8 mit sich in Abhängig­ keit der Öltemperatur veränderndem Strömungsquerschnitt zu­ sammen. Die temperaturgesteuerte Drossel 8 gibt während der Warmlaufphase des Motors einen zusätzlichen temperaturabhängi­ gen Querschnitt frei und kompensiert damit das mit abnehmender Temperatur steigende Motoröldruckniveau. Die Temperaturabhän­ gigkeit der Drossel 8 ist also derart, daß sich deren Strö­ mungsquerschnitt mit abnehmender Temperatur des Motoröls ver­ größert.The outlet throttle 6 is composed of a throttle 7 with a constant cross-section and a throttle 8 with depending on the speed of the oil temperature changing flow cross-section together. The temperature-controlled throttle 8 releases an additional temperature-dependent cross-section during the warm-up phase of the engine and thus compensates for the increasing engine oil pressure level with decreasing temperature. The temperature dependency of the throttle 8 is so such that the flow cross-section increases with decreasing temperature of the engine oil ver.

Insgesamt werden durch die erfindungsgemäß aufgebaute Spann­ einrichtung folgende drei wichtigen Vorteile erzielt:Overall, the tension constructed according to the invention three major benefits:

  • a) In Abhängigkeit vom Motoröldruck wird an jedem Betriebs­ punkt ein definierter Steueröldruck zur Verfügung gestellt. Mit steigender Drehzahl und somit steigendem Motoröldruck sorgt ein höherer Steueröldruck für eine Reduzierung der Spannkraft entlang einer vorgegebenen Kennlinie. a) Depending on the engine oil pressure at each farm a defined control oil pressure is made available. With increasing speed and thus increasing engine oil pressure a higher control oil pressure reduces the Clamping force along a given characteristic.  
  • b) Innerhalb der Ansteuerung findet eine Eliminierung des Öl­ temperatureinflusses, d. h. der Viskosität statt. Damit wird gewährleistet, daß unabhängig vom Betriebszustand des Motors die Spannkraft konstant gehalten werden kann.b) The oil is eliminated within the control temperature influence, d. H. the viscosity instead. So that will ensures that regardless of the operating state of the engine the clamping force can be kept constant.
  • c) Die Ansteuerung enthält Drosselelemente, die nur ein defi­ niertes Steuerölvolumen pro Zeiteinheit freigeben. Hierdurch läßt sich das Dämpfungsverhalten der Spanneinrichtung inner­ halb bestimmter Grenzen festlegen, so daß Kraftspitzen und Schwingungen optimal abgefangen werden können.c) The control contains throttle elements that only a defi Release the specified control oil volume per unit of time. Hereby the damping behavior of the tensioning device can be internal set certain limits, so that force peaks and Vibrations can be optimally intercepted.

Claims (3)

1. Spanneinrichtung für Ketten- oder Riementriebe, insbeson­ dere Steuer- und/oder Hilfsaggregate-Triebe, von Kraftfahr­ zeugverbrennungsmotoren, bei der die für das Spannen wirksame Kraft einer mechanischen Spannfeder mit zunehmender Geschwin­ digkeit des Triebes durch eine proportional steigende Gegen­ kraft hydraulisch reduziert wird, dadurch gekennzeichnet, daß die hydraulische Gegenkraft aus dem Motoröldruck resul­ tiert und diesem proportional ist.1. tensioning device for chain or belt drives, in particular control and / or auxiliary unit drives, of automotive internal combustion engines, in which the force of a mechanical tension spring effective for tensioning is hydraulically reduced with increasing speed of the drive by a proportionally increasing counterforce , characterized in that the hydraulic counterforce results from the engine oil pressure and is proportional to this. 2. Spanneinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die hydraulische Gegenkraft von einem Druckraum (4) aus­ geht, in den das unter Druck stehende Motoröl über eine Ein­ trittsdrossel (5) ein- und aus der es über eine Austrittsdros­ sel (6) auf ein niedrigeres Druckniveau wieder austritt.2. Clamping device according to claim 1, characterized in that the hydraulic counterforce goes from a pressure chamber ( 4 ) into which the pressurized engine oil via an inlet throttle ( 5 ) and out of which it has an outlet throttle sel ( 6 ) escapes to a lower pressure level. 3. Spanneinrichtung nach Anspruch 2 oder 1, dadurch gekennzeichnet, daß der Strömungsquerschnitt der Austrittsdrossel (6) mit steigender Öltemperatur abnimmt.3. Clamping device according to claim 2 or 1, characterized in that the flow cross section of the outlet throttle ( 6 ) decreases with increasing oil temperature.
DE19914100503 1991-01-10 1991-01-10 Tensioner device for chain or belt drives - uses engine oil pressure to reduce mechanical tension spring force Granted DE4100503A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19914100503 DE4100503A1 (en) 1991-01-10 1991-01-10 Tensioner device for chain or belt drives - uses engine oil pressure to reduce mechanical tension spring force

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19914100503 DE4100503A1 (en) 1991-01-10 1991-01-10 Tensioner device for chain or belt drives - uses engine oil pressure to reduce mechanical tension spring force

Publications (2)

Publication Number Publication Date
DE4100503A1 true DE4100503A1 (en) 1992-07-16
DE4100503C2 DE4100503C2 (en) 1992-11-26

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3732097A1 (en) * 1987-09-24 1989-04-06 Stabilus Gmbh DAMPER FOR THE TENSIONING DEVICE OF A BELT DRIVE, WITH INTEGRATED BLOCKING SYSTEM
DE4411980A1 (en) * 1994-04-07 1995-10-12 Schaeffler Waelzlager Kg Combined thermal and hydraulic tensioning device
DE19604182A1 (en) * 1995-03-20 1996-09-26 Ford Werke Ag Accessories drive for IC engine
US5993339A (en) * 1996-10-15 1999-11-30 Renold Plc Chain tensioner with a spring and hydraulic fluid acting on both sides of a piston
DE10005073A1 (en) * 2000-02-04 2001-09-20 Schaeffler Waelzlager Ohg Tensioner for power transmitting element comprises hollow plunger guided in cylinder for displacement in axial direction and spring loaded in direction of power transmitting element
GB2414056A (en) * 2004-05-12 2005-11-16 Ford Global Tech Llc A hydraulic chain tensioner having a pressure regulator
DE102013014975A1 (en) * 2013-09-09 2015-03-12 Iwis Motorsysteme Gmbh & Co. Kg Clamping device with temperature-dependent damping
DE102008004169B4 (en) * 2007-04-04 2020-12-03 Iwis Motorsysteme Gmbh & Co. Kg Clamping device with temperature-dependent valve

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4424792A1 (en) * 1994-07-14 1996-01-18 Schaeffler Waelzlager Kg Hydraulic tensioning device with temp. compensation

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE849938C (en) * 1949-01-25 1952-09-18 Hermann Truempy Automatic voltage regulator for the chain drive of the control shafts of internal combustion engines
DE2144688A1 (en) * 1971-09-07 1973-03-15 Kloeckner Humboldt Deutz Ag V-BELT TENSIONING DEVICE
DE2819608A1 (en) * 1978-05-05 1979-11-08 Kloeckner Humboldt Deutz Ag Hydraulic tensioner for V=belt drive - has ram and idling pistons in common cylinder with fluid from driven machine delivered between
DE3824555C1 (en) * 1988-07-20 1989-07-06 Daimler-Benz Aktiengesellschaft, 7000 Stuttgart, De Hydraulic chain tensioner for an internal combustion engine
JPH0695247A (en) * 1992-09-09 1994-04-08 Fuji Photo Film Co Ltd Overhead projector

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE849938C (en) * 1949-01-25 1952-09-18 Hermann Truempy Automatic voltage regulator for the chain drive of the control shafts of internal combustion engines
DE2144688A1 (en) * 1971-09-07 1973-03-15 Kloeckner Humboldt Deutz Ag V-BELT TENSIONING DEVICE
DE2819608A1 (en) * 1978-05-05 1979-11-08 Kloeckner Humboldt Deutz Ag Hydraulic tensioner for V=belt drive - has ram and idling pistons in common cylinder with fluid from driven machine delivered between
DE3824555C1 (en) * 1988-07-20 1989-07-06 Daimler-Benz Aktiengesellschaft, 7000 Stuttgart, De Hydraulic chain tensioner for an internal combustion engine
JPH0695247A (en) * 1992-09-09 1994-04-08 Fuji Photo Film Co Ltd Overhead projector

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3732097A1 (en) * 1987-09-24 1989-04-06 Stabilus Gmbh DAMPER FOR THE TENSIONING DEVICE OF A BELT DRIVE, WITH INTEGRATED BLOCKING SYSTEM
DE4411980A1 (en) * 1994-04-07 1995-10-12 Schaeffler Waelzlager Kg Combined thermal and hydraulic tensioning device
DE19604182A1 (en) * 1995-03-20 1996-09-26 Ford Werke Ag Accessories drive for IC engine
US5993339A (en) * 1996-10-15 1999-11-30 Renold Plc Chain tensioner with a spring and hydraulic fluid acting on both sides of a piston
DE10005073A1 (en) * 2000-02-04 2001-09-20 Schaeffler Waelzlager Ohg Tensioner for power transmitting element comprises hollow plunger guided in cylinder for displacement in axial direction and spring loaded in direction of power transmitting element
GB2414056A (en) * 2004-05-12 2005-11-16 Ford Global Tech Llc A hydraulic chain tensioner having a pressure regulator
DE102008004169B4 (en) * 2007-04-04 2020-12-03 Iwis Motorsysteme Gmbh & Co. Kg Clamping device with temperature-dependent valve
DE102013014975A1 (en) * 2013-09-09 2015-03-12 Iwis Motorsysteme Gmbh & Co. Kg Clamping device with temperature-dependent damping

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Owner name: DAIMLER-BENZ AKTIENGESELLSCHAFT, 70567 STUTTGART,

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Owner name: DAIMLERCHRYSLER AG, 70567 STUTTGART, DE AFT ATLAS

8339 Ceased/non-payment of the annual fee