EP1751449A1 - Entrainement par friction - Google Patents

Entrainement par friction

Info

Publication number
EP1751449A1
EP1751449A1 EP05744144A EP05744144A EP1751449A1 EP 1751449 A1 EP1751449 A1 EP 1751449A1 EP 05744144 A EP05744144 A EP 05744144A EP 05744144 A EP05744144 A EP 05744144A EP 1751449 A1 EP1751449 A1 EP 1751449A1
Authority
EP
European Patent Office
Prior art keywords
friction wheel
drive
contact
friction
wheel drive
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.)
Withdrawn
Application number
EP05744144A
Other languages
German (de)
English (en)
Inventor
Horst Adel
Michael Bogner
Johann Singer
Thomas Kraft
Diethard Sauermann
Ralf Walter
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.)
IHO Holding GmbH and Co KG
Original Assignee
Schaeffler KG
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 Schaeffler KG filed Critical Schaeffler KG
Publication of EP1751449A1 publication Critical patent/EP1751449A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F16H13/00—Gearing for conveying rotary motion with constant gear ratio by friction between rotary members
    • F16H13/10—Means for influencing the pressure between the members
    • F16H13/14—Means for influencing the pressure between the members for automatically varying the pressure mechanically
    • 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
    • F16H7/02—Gearings for conveying rotary motion by endless flexible members with belts; with V-belts

Definitions

  • the invention relates to a friction wheel drive for frictionally driving units of an internal combustion engine.
  • the friction wheel drive is provided with an adjustable friction wheel, which can be positively pressed onto at least one contact disk of a drive and an output member.
  • friction wheel drive with an adjustable friction wheel that can be pressed onto the contact disk of a drive element and that has its own drive.
  • the friction wheel drive comprises an electric motor, which drives a friction wheel via a gear, which can be adjusted in the direction of a wheel rim as required.
  • the wheels which are electrically driven via the friction wheel drive, support the conventionally driven wheels in the event of insufficient static friction, which can occur for example with black ice or in the case of poor performance of the conventional drive z. B. on too steep slopes.
  • a disadvantage of the friction wheel drive described above is that due to its independent drive, a large number of additional components are required, which increase the susceptibility to faults as well as the required installation space and the weight of the system.
  • the invention is based on the object of realizing a friction wheel drive which allows a small axial installation space and a need-dependent, reliable drive of an auxiliary unit of the internal combustion engine. Summary of the invention
  • the invention according to claim 1 provides that the friction wheel, at least when the internal combustion engine is running, is in permanent frictional connection with the contact disks of an associated drive and output member, thus ensuring the operation of an auxiliary unit during the operating life of the internal combustion engine.
  • the switchable clutch is used to separate the output and drive elements of the auxiliary unit as required. If the auxiliary unit is a coolant pump, this can be switched off, for example, in the start phase of the internal combustion engine and thus cause it to heat up more quickly. The faster reaching of the operating temperature has a decisive influence on the wear and the pollutant emission of the internal combustion engine. At the same time the Motor required drive power by the amount of drive power of the coolant pump. This reduces the fuel consumption of the internal combustion engine in this phase.
  • the switchable clutch is designed as a friction disc clutch.
  • a friction disc clutch is characterized by its simple structure, reliable function and oil-free operation. It is therefore an inexpensive component that is suitable for an unencapsulated friction wheel drive.
  • the friction disc clutch has the advantage of being able to be integrated into the installation space of the contact disc of the auxiliary unit, so that no additional space is required.
  • An actuator which serves to apply the contact pressure to the friction wheel which is necessary for the frictional transmission of the power required in each case from the output element to the drive element.
  • the lowest possible contact force that can be achieved in this way reduces the wear and the flexing of a friction wheel that has a rubber lining that increases the coefficient of friction.
  • a fixed measure of the slip between the output and the drive member which, for. B. can be determined by speed comparison between the output and drive member.
  • the contact pressure of the friction wheel can be generated in various ways.
  • Mechanical means z. B. in the form of a compression or tension spring are characterized by low construction costs and great reliability, but are less suitable for an accurate and rapid adjustment of the contact pressure.
  • a further possibility for adjusting the actuator is provided by an electromagnet, which can be energized, for example, with a time delay after the start of the internal combustion engine, in order to activate the friction wheel drive.
  • An electric motor is particularly suitable for adjusting the actuator.
  • a combination of the electric motor with a threaded spindle in the form of a ball screw drive or a roller screw drive is also used here.
  • the electric motor allows regulation in a particularly simple manner by means of an electronic regulator which is regulated taking into account the slip between the output and drive element.
  • the object of the invention is also solved by the independent claim 7.
  • This describes a demand-dependent friction wheel drive which, together with a traction drive, forms a drive for auxiliary units of an internal combustion engine. Since the friction wheel, the traction mechanism drive and their common output element are arranged in one plane and have the same width, their axial space requirement is limited to their width.
  • a prerequisite for the space-saving arrangement of the friction wheel, traction mechanism and output element is the drive of the friction wheel indirectly via the traction mechanism and not directly via a correspondingly wide contact disk of the crankshaft, on which the traction mechanism and the friction wheel should be arranged side by side.
  • the friction wheel Since the friction wheel is in indirect contact with the contact disk of the crankshaft via the traction means, the contact pressure of the traction device on the contact disk of the crankshaft is increased by the contact pressure of the friction wheel and the slip of the traction device on the contact disk is thereby reduced.
  • the need-dependent friction wheel drive of the coolant pump enables it to come to a standstill, which leads to the rapid warming up of the internal combustion engine in the starting phase. In contrast to the coolant pump, it makes sense for the generator to take up power in the entire operating range of the internal combustion engine.
  • the friction wheel is in pressure contact both with the contact disk of the coolant pump and with the empty run of a normal belt, which is used, for example, to drive at least one generator and one air conditioning compressor.
  • the friction wheel replaces a belt tensioner for the traction mechanism drive and serves as a vibration damper for the same.
  • FIG. 1 shows a friction wheel drive according to the invention with a friction wheel in connection with a traction drive of a combustion tion motor, wherein the empty run of the traction mechanism has a deflection roller;
  • Figure 2 shows the friction wheel drive according to the invention in connection with a traction drive of an internal combustion engine similar to Figure 1, wherein the friction wheel is at the same time clamping means for the traction means.
  • FIG. 1 shows a need-dependent friction wheel drive 1 in combination with a traction mechanism drive 2, which serve to drive various auxiliary units of an internal combustion engine.
  • the friction wheel drive 1 has a friction wheel 3 with a friction lining 17 which promotes static friction.
  • the friction wheel 3 is in frictional pressure contact with a contact disk 4 of a drive member 5 of a coolant pump of the internal combustion engine and with a contact disk 6 of an output member 7 of the crankshaft during the operating life of the engine.
  • the contact pressure of the friction wheel 3 is based on an actuator 8.
  • This is designed as an electrically operated screw drive which has a threaded spindle 12 which is infinitely adjustable by an electric motor 13. At the free end of the threaded spindle 12 there is a friction wheel bearing 14 for the storage of the friction wheel 3 and for the transmission of the contact pressure to the same.
  • a support bearing 15 fixed to the housing is provided to support the contact pressure.
  • the electric motor 13 is in conductive connection with a controller 16. This evaluates the peripheral speed of the contact disks 4 and 6 with the aid of sensors (not shown) and calculates the slip between the output member 7 and the drive member 5.
  • the controller 16 regulates the required minimum contact pressure of the actuator 8 depending on the performance such that a certain minimum slip is maintained during the entire operation of the internal combustion engine. Maintaining this minimum contact pressure for the power to be transmitted in each case offers the advantage that the wear and the flexing work of the friction lining 17 are minimized.
  • the need-dependent dependence of the friction wheel drive is achieved by means of a friction disk clutch 18, which is integrated in the contact disk 4 of the coolant pump.
  • the friction disk clutch 18 is automatically disengaged when the internal combustion engine is started and automatically re-engaged when a certain coolant and / or lubricating oil temperature is reached. This allows the internal combustion engine to warm up quickly while at the same time reducing power loss.
  • the traction mechanism drive 2 serves to drive further auxiliary units of the internal combustion engine, such as a generator 9 and an air conditioning compressor 20.
  • a traction mechanism 10 connects all associated contact disks or pulleys to the contact disk 6, which is connected to the crankshaft in a rotationally fixed manner and at the same time forms the output element 7 ,
  • the traction mechanism drive 2 has a deflection roller 11.
  • FIG. 2 shows a variant of the combined friction wheel / traction mechanism drive from FIG. 1.
  • the friction wheel 3 is in direct frictional pressure contact with the contact disk 4 of the coolant pump, the friction disk clutch 18 being integrated into the contact disk 4.
  • the friction wheel 3 receives the function a tensioning roller for the traction means 10. This function is realized in that the pressing movement of the friction wheel 3 is opposite to the direction of movement of the empty run 19.
  • the friction wheel 3 is supported on the contact disk 4 of the coolant pump and on the empty run 19 of the traction means 10 designed as a normal belt for driving the generator 9 and the air conditioning compressor 20 and tensions the same. This eliminates the need for a separate clamping element.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Friction Gearing (AREA)

Abstract

L'invention concerne un entraînement par friction, notamment pour entraîner par friction un groupe auxiliaire d'un moteur à combustion interne. Cet entraînement comporte une roue de friction (3) mobile, qui peut être mise en contact par pression avec au moins un disque de contact (4, 6) d'un organe d'entraînement (5) et/ou d'un organe entraîné (7). L'entraînement du groupe auxiliaire en fonction des besoins est réalisé par un accouplement embrayable servant à la séparation de l'organe d'entraînement (5) et du groupe auxiliaire en fonction des besoins.
EP05744144A 2004-05-25 2005-04-22 Entrainement par friction Withdrawn EP1751449A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004025542A DE102004025542A1 (de) 2004-05-25 2004-05-25 Reibradantrieb
PCT/EP2005/004345 WO2005116486A1 (fr) 2004-05-25 2005-04-22 Entrainement par friction

Publications (1)

Publication Number Publication Date
EP1751449A1 true EP1751449A1 (fr) 2007-02-14

Family

ID=34968256

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05744144A Withdrawn EP1751449A1 (fr) 2004-05-25 2005-04-22 Entrainement par friction

Country Status (5)

Country Link
US (1) US20080058148A1 (fr)
EP (1) EP1751449A1 (fr)
CN (1) CN1961166A (fr)
DE (1) DE102004025542A1 (fr)
WO (1) WO2005116486A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4816093B2 (ja) * 2006-01-16 2011-11-16 日産自動車株式会社 摩擦伝動装置
DE102012101044A1 (de) * 2012-02-09 2013-08-14 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Brennkraftmaschine, Steuerungseinrichtung für eine Brennkraftmaschine und Verfahren zum Betreiben einer Brennkraftmaschine
CN104220780B (zh) 2012-03-29 2018-03-20 利滕斯汽车合伙公司 张紧器及环形传动装置
CN102635440B (zh) * 2012-04-28 2016-06-01 重庆长安汽车股份有限公司 一种传动轮总成以及采用该传动轮总成的发动机前端轮系
ITTO20120548A1 (it) * 2012-06-21 2013-12-22 Dayco Europe Srl Tenditore controllato per una trasmissione accessori e trasmissione accessori comprendente tale tenditore
CN102767510A (zh) * 2012-07-30 2012-11-07 长城汽车股份有限公司 实现车辆水泵智能启停的控制***
CN104492612A (zh) * 2015-01-05 2015-04-08 天津理工大学 一种离心机
WO2018049521A1 (fr) 2016-09-13 2018-03-22 Litens Automotive Partnership Tendeur en v et agencement d'entraînement sans fin
CN107264708A (zh) * 2017-06-09 2017-10-20 江苏大学 一种电动助力装置
CN108662103A (zh) * 2018-07-21 2018-10-16 安吉元融仪器仪表检测有限公司 车辆用水泵的动力传递装置

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CH1820167A4 (fr) * 1967-12-27 1970-02-27
DE2011420A1 (de) * 1970-03-11 1971-09-23 Maschinenfabrik Fahr Ag, 7702 Gottmadingen Drehrichtungssteuerbares Getriebe
AT366802B (de) * 1980-07-25 1982-05-10 Steyr Daimler Puch Ag Riemen-reibradgetriebe
FR2544825B3 (fr) * 1983-04-21 1985-12-06 Int Harvester France Dispositif de commande selective du mouvement de rotation d'un arbre
JPH02271140A (ja) * 1989-04-11 1990-11-06 Canon Inc 回転摩擦駆動装置の制御装置
DE3934884A1 (de) * 1989-10-19 1991-04-25 Bayerische Motoren Werke Ag Endloses zugmittelgetriebe einer brennkraftmaschine
JP2879592B2 (ja) * 1990-06-01 1999-04-05 光洋精工株式会社 遊星ローラ型動力伝達装置
DE19635808A1 (de) * 1996-09-04 1998-03-05 Bayerische Motoren Werke Ag Antriebsvorrichtung für ein Fahrzeugrad mit Radfelge
DE19940963A1 (de) * 1999-08-28 2001-03-01 Bayerische Motoren Werke Ag Spannvorrichtung für einen Hülltrieb, insbesondere Riementrieb für Nebenaggregate an Brennkraftmaschinen
DE10013252A1 (de) * 2000-03-17 2001-10-25 Audi Ag Kühlflüssigkeitspumpe
DE10236746A1 (de) * 2002-08-10 2004-02-19 Bayerische Motoren Werke Ag Brennkraftmaschine mit einer Antriebsanordnung für Aggregat-Module
DE10255077A1 (de) * 2002-11-26 2004-06-03 Bayerische Motoren Werke Ag Von einem Riementrieb für Hilfsaggregate einer Brennkraftmaschine angetriebenes Reibradgetriebe für ein Nebenaggregat

Non-Patent Citations (1)

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See references of WO2005116486A1 *

Also Published As

Publication number Publication date
CN1961166A (zh) 2007-05-09
WO2005116486A1 (fr) 2005-12-08
DE102004025542A1 (de) 2005-12-22
US20080058148A1 (en) 2008-03-06

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Inventor name: SINGER, JOHANN

Inventor name: BOGNER, MICHAEL

Inventor name: SAUERMANN, DIETHARD

Inventor name: KRAFT, THOMAS

Inventor name: ADEL, HORST

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