EP0837782A1 - Agencement de pedale amortie - Google Patents

Agencement de pedale amortie

Info

Publication number
EP0837782A1
EP0837782A1 EP97905270A EP97905270A EP0837782A1 EP 0837782 A1 EP0837782 A1 EP 0837782A1 EP 97905270 A EP97905270 A EP 97905270A EP 97905270 A EP97905270 A EP 97905270A EP 0837782 A1 EP0837782 A1 EP 0837782A1
Authority
EP
European Patent Office
Prior art keywords
pedal
lever arm
accelerator pedal
friction member
unit according
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Withdrawn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
EP97905270A
Other languages
German (de)
English (en)
Inventor
Spencer Peter Thomas
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.)
ADWEST DRIVER SYSTEMS Ltd
Original Assignee
ADWEST DRIVER SYSTEMS Ltd
Adwest Rearsby Ltd
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 ADWEST DRIVER SYSTEMS Ltd, Adwest Rearsby Ltd filed Critical ADWEST DRIVER SYSTEMS Ltd
Publication of EP0837782A1 publication Critical patent/EP0837782A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G1/00—Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
    • G05G1/30—Controlling members actuated by foot
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K26/00—Arrangements or mounting of propulsion unit control devices in vehicles
    • B60K26/02—Arrangements or mounting of propulsion unit control devices in vehicles of initiating means or elements
    • B60K26/021—Arrangements or mounting of propulsion unit control devices in vehicles of initiating means or elements with means for providing feel, e.g. by changing pedal force characteristics
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G5/00—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member
    • G05G5/03—Means for enhancing the operator's awareness of arrival of the controlling member at a command or datum position; Providing feel, e.g. means for creating a counterforce
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G7/00—Manually-actuated control mechanisms provided with one single controlling member co-operating with one single controlled member; Details thereof
    • G05G7/02—Manually-actuated control mechanisms provided with one single controlling member co-operating with one single controlled member; Details thereof characterised by special provisions for conveying or converting motion, or for acting at a distance
    • G05G7/04—Manually-actuated control mechanisms provided with one single controlling member co-operating with one single controlled member; Details thereof characterised by special provisions for conveying or converting motion, or for acting at a distance altering the ratio of motion or force between controlling member and controlled member as a function of the position of the controlling member

Definitions

  • the invention relates to pedal mountings for the accelerator pedals of automobiles and provides a hysteresis-inducing unit for an accelerator pedal mounting which creates a desirable damped movement in use.
  • the engine speed of an automobile has been controlled from a foot pedal, or accelerator pedal, via a rod or cable linkage to a carburettor or fuel injection system. Depression of the accelerator pedal causes an increase in the fuel supply to the engine, which thus increases speed.
  • the rod or cable linkage has a frictional resistance to movement, which not only gives the accelerator pedal a familiar and recognizable ' feel ' to the driver, but also reduces excessive oscillatory pedal movement or dither as a consequence of feedback from road shocks experienced by the moving vehicle.
  • a relatively recent development in automobile engine control is the introduction of the so-called 1 drive-by- ire' system of engine control, in which a transducer is attached to the accelerator pedal, and the pedal position is translated by the transducer into an electrical signal which is delivered to the engine management system to control the vehicle engine speed.
  • the electrical signal can be processed by the engine management system in order to provide the desired engine response, and it has been proposed that undue oscillatory movement of the pedal could be filtered out of the electrical signal at the engine management system. That represents an electronics-based solution to the problem of pedal dither. Electrical processing of the accelerator pedal position signal does not, however, improve the 'feel 1 of an accelerator pedal which is linked to the engine and engine management system electrically rather than mechanically.
  • Pedal mountings have therefore been proposed in which frictional forces resisting pedal movement, comparable to the frictional resistance of the traditional rod or cable linkage, are deliberately incorporated into the pedal mounting.
  • Such mountings are designed to introduce hysteresis into the pedal movement, with a significantly larger force being required to initiate pedal movement than to maintain a constant pedal position.
  • One prior proposed hysteresis-inducing pedal mounting incorporates two coaxial friction discs, one associated with the pedal and the other associated with a housing for the pedal mounting.
  • the discs are biased axially into frictional contact with each other, so as to provide a constant frictional resistance to pedal movement.
  • Another prior proposed hysteresis-inducing pedal mounting incorporates arcuate brake shoes spring-biased onto a pivot shaft for the accelerator pedal or onto an enlarged portion of that shaft.
  • the invention provides a hysteresis-inducing unit for an accelerator pedal mounting of a motor vehicle, comprising: a housing for attachment to the accelerator pedal mounting, a lever arm mounted in the housing to be movable as one with the accelerator pedal over a permitted arc of pedal movement, a first friction member fast to the housing and presenting an inwardly facing curved reaction face, facing the lever arm over the permitted arc of movement of the lever arm, and a second friction member biased radially outwardly from an end of the lever arm into frictional contact with the reaction face, to create a frictional resistance to movement of the accelerator pedal.
  • the inwardly facing curved reaction face ' of the first friction member may be arcuate, with the centre of arc being the pivotal axis of the accelerator pedal and lever arm. That creates a uniform hysteresis characteristic over the range of pedal movement.
  • the reaction face may be of a curved shape which has a different radial spacing from the pedal pivotal axis for different pedal angles, so as to provide a non-uniform hysteresis characteristic over the range of pedal movement.
  • the reaction face may be closer to the pedal axis at one end, corresponding to maximum pedal depression, than at the other, corresponding to minimum pedal depression.
  • the spacing from the axis may vary uniformly or non-uniformly over the angular extent of the reaction face.
  • the consequence of such a design of reaction face would be that the second friction member would be more strongly biased into frictional contact with the reaction surface for maximum pedal depression than for minimum pedal depression.
  • the damping effect of the unit on pedal movement would therefore be greater for higher engine speeds than for lower engine speeds.
  • No other hysteresis-inducing unit provides, at low cost, such a total control over the applied hysteresis characteristic imposed by the unit.
  • the second frictional member may be a member longitudinally movable relative to the lever arm and spring-biased radially outwardly from the distal end of the lever arm.
  • the spring bias may be by a coil or leaf spring or other resilient means.
  • a preferred and highly cost-effective second frictional member is, however, a steel leaf spring mounted at its ends on the distal end of the lever arm and resiliently presenting a portion intermediate its ends into direct frictional engagement with the reaction face of the first frictional member.
  • the frictional characteristics of the first and second friction members should be such as to provide a resistance to relative movement but not to prevent relative movement. High friction facings are not therefore necessary.
  • the first friction member is made as an injection moulding from an acetal resin, such as that commercially available under the Trade Mark DELRIN, which has good wear resistance and is self-lubricating so as to give a very constant and reproducible frictional characteristic.
  • the unit may be mounted with the lever arm extending generally upwardly from the pivotal axis of the accelerator pedal, so as to extend into a void space which is generally available, or which can be made available by design, on a motor vehicle.
  • the availability of this void space means that the length of the lever arm can be extended to allow for the use of correspondingly reduced spring bias pressures between the friction members .
  • a position transducer for the accelerator pedal such as a potentiometer, is mounted coaxially with the pivotal axis of the accelerator pedal on one side of the pedal, and the unit according to the invention can be mounted on the opposite side of the pedal .
  • Figure 1 is a perspective view of an accelerator pedal of a motor vehicle, with a hysteresis-inducing unit according to the invention mounted thereto;
  • Figure 2 is a front elevation of the pedal mounting of
  • Figure 3 is a transverse section through the hystereis-inducing unit of Figures 1 and 2.
  • Figure 1 shows an accelerator pedal 1 pivotally supported by a mounting 2. At a lower end of pedal 1 is a foot-engageable pad 3, depression of which causes the pedal 1 to move pivotally about a pivot axis 4. On the opposite side of the pivot axis 4 to the foot pad 3, the pedal has an integral lever arm 5 which receives one end of a return spring 6 the opposite end of which is anchored to a reaction member, not shown, fast to the vehicle body.
  • the pedal 1 illustrated in Figure 1 is a universal design which can be used with a cable transmission to the engine speed control mechanism or with an electrical transmission. If a cable transmission were used, then one end of the transmission cable would be anchored in a receiving recess 7 at the top of the lever arm 5. As illustrated, however, the pedal 1 is provided with an electrical transmission link.
  • a potentiometer 8 is mounted on one side of the pedal 1 (the left hand side as seen from the driver's position) co-axial with the pivotal axis 4. The electrical output of the potentiometer 8 is a direct measure of the pedal position, and is transmitted by wire (not shown) to the engine management system of the vehicle.
  • a hystereis-inducing unit 10 mounted coaxially with the pivot axis 4 on the opposite side of the foot pedal 1 to the potentiometer 8 (see particularly Figure 2) .
  • the unit 10 comprises a housing 11 fast to the mounting 2.
  • a lever arm 12 secured to a pivot shaft 13 of the accelerator pedal 1 and movable as one with the accelerator pedal 1.
  • Figure 3 most clearly illustrates the shape and disposition of the lever arm 12.
  • the two opposite ends 15a, 15b of the leaf spring 15 bear on the lever arm 12 and an intermediate portion 15c is resiliently biased against a curved inwardly facing surface of a friction pad 16.
  • the friction pad 16 forms a first friction member of the hysteresis-inducing unit 10 and the intermediate portion 15c of the leaf spring 15 forms a second friction member.
  • Pedal movement causes the second member 15c to slide over the first, with a frictional resistance to movement, thus simulating the frictional resistance to movement of a conventional cable transmission to the engine compartment.
  • the lever arm 12 can be made of a length sufficient to create a desirable damping effect even when using a relatively light spring 15.
  • the surface of the spring 15 is smooth, so that it can slide over the internally facing curved face of the friction pad 16 with a smooth frictional drag.
  • the smoothness of movement may be enhanced by making the friction pad 16 of a smooth surfaced self-lubricating material such as DELRIN (Trade Mark) polyacetal.
  • the internally facing curved face of the friction pad 16 may be arcuate, centred around the axis 4, in which case the preloading force of the spring 15 is constant for all degrees of angular movement of the pedal 1. That gives a hysteresis characteristic or pedal damping effect which is uniform over the whole range ox pedal movement. That may be desirable in some installations. In other vehicle designs, however, it may be desirable to have the hysteresis characteristic vary with progressive pedal movement. For example, a greater drag factor on pedal movement may be desirable for higher vehicle speeds (and therefore engine speeds) than for lower.
  • the unit 10 by shaping the internally facing curved face of the friction pad 16 so that it is non-arcuate, or arcuate but not centred around the axis 4, so that at maximum pedal movement the spring 15 is more highly compressed than at minimum pedal movement . It is a significant advantage of the unit according to the invention that the hysteresis characteristic imparted to the pedal can be changed simply by changing the shape of the friction pad 16.
  • the pad 16 is therefore designed as a simple clip-on component to an otherwise standardized design of housing 11. Differently shaped pads 16 can be provided for different motor vehicles.
  • the unit according to the invention does not protrude significantly below the pivotal axis 4. Instead, the lever arm 5 extends above the axis 4 so that the unit is positioned substantially wholly in the void space above the pedal mounting 2, where conventionally such void space is available and where the unit does not interfere with the driver' s foot movement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)

Abstract

Cet agencement de pédale induisant une hystérésis est destiné à une pédale d'accélérateur d'un véhicule à moteur, et il permet de faire facilement varier cette caractéristique d'hystérésis afin de répondre aux paramètres de conception de l'automobile dans laquelle il doit être installé. L'ensemble pédale comprend un boîtier (1) destiné à être fixé audit agencement de pédale (2) de véhicule à moteur au moyen d'un levier (12) monté dans le boîtier de manière à être déplacé comme un tout en même temps que la pédale d'accélérateur (1), le long d'un arc de course permis de la pédale. Un premier élément de friction (16), fixe par rapport au boîtier, (11) présente une face de réaction, courbe, tournée vers l'intérieur et faisant face au levier (12) le long de l'arc de course permis. Un second élément de friction (15c) est sollicité radialement vers l'extérieur à partir d'une extrémité du levier (12), afin d'entrer en contact frictionnel avec la face de réaction du premier élément de friction (16) et créer une résistance frictionnelle au déplacement de la pédale d'accélérateur (1).
EP97905270A 1996-02-26 1997-02-25 Agencement de pedale amortie Withdrawn EP0837782A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB9604039.9A GB9604039D0 (en) 1996-02-26 1996-02-26 Damped pedal mounting
GB9604039 1996-02-26
PCT/GB1997/000525 WO1997030863A1 (fr) 1996-02-26 1997-02-25 Agencement de pedale amortie

Publications (1)

Publication Number Publication Date
EP0837782A1 true EP0837782A1 (fr) 1998-04-29

Family

ID=10789419

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97905270A Withdrawn EP0837782A1 (fr) 1996-02-26 1997-02-25 Agencement de pedale amortie

Country Status (3)

Country Link
EP (1) EP0837782A1 (fr)
GB (1) GB9604039D0 (fr)
WO (1) WO1997030863A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2349447B (en) * 1999-04-30 2003-07-09 Birkbys Plastics Ltd A control pedal assembly
WO2001019638A1 (fr) * 1999-09-14 2001-03-22 Mikuni Corporation Dispositif de pedale d'accelerateur
US6622589B1 (en) * 1999-11-19 2003-09-23 Aptek Williams, Inc. Manual control apparatus
KR100346437B1 (ko) * 1999-11-19 2002-08-01 기아자동차주식회사 자동차의 전기식 엑셀러레이터 페달 어셈블리
DE10007743A1 (de) * 2000-02-19 2001-08-23 Mannesmann Vdo Ag Pedal
DE10106709A1 (de) * 2001-02-14 2002-08-22 Siemens Ag Pedal
DE10121317B4 (de) * 2001-05-02 2010-12-09 Volkswagen Ag Pedaleinrichtung
US6575053B2 (en) * 2001-05-25 2003-06-10 Teleflex Incorporated Electronically controlled pedal assembly having a hysteresis generating structure
JP3700682B2 (ja) * 2002-06-20 2005-09-28 日産自動車株式会社 アクセルペダル装置
DE10230724A1 (de) * 2002-07-08 2004-01-29 Siemens Ag Leistungssteuereinrichtung
US7237453B2 (en) 2002-07-08 2007-07-03 Siemens Ag Acceleration pedal module with controllable friction device
WO2011028830A1 (fr) * 2009-09-02 2011-03-10 Cts Corporation Ensemble pédale d’accélérateur
CN106274475B (zh) 2011-10-07 2018-12-14 Cts公司 具有迟滞总成的车辆踏板总成
DE102014102758A1 (de) * 2014-03-03 2015-09-03 Hella Kgaa Hueck & Co. Fahrpedalgeber
DE102020211085B4 (de) 2020-09-02 2022-07-28 Volkswagen Aktiengesellschaft Bremspedalsystem mit einem Bremskraftsimulator, Brake-by-Wire-Bremssystem sowie Kraftfahrzeug
CN112389457B (zh) * 2020-11-10 2022-02-01 安徽江淮汽车集团股份有限公司 油门踏板振动的优化方法、装置、设备及存储介质

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4300096C2 (de) * 1993-01-05 1998-02-05 Mannesmann Vdo Ag Fahrpedal mit Drehpotentiometer
DE4407005C1 (de) * 1994-03-03 1995-03-09 Hella Kg Hueck & Co Fahrpedaleinrichtung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9730863A1 *

Also Published As

Publication number Publication date
WO1997030863A1 (fr) 1997-08-28
GB9604039D0 (en) 1996-04-24

Similar Documents

Publication Publication Date Title
EP1627268B1 (fr) Pedale d'accelerateur pour vehicule a moteur
WO1997030863A1 (fr) Agencement de pedale amortie
US20120031221A1 (en) Accelerator Pedal for a Vehicle
EP2390752B1 (fr) Pédale d'accélérateur pour véhicule
US6880427B2 (en) Adjustable brake, clutch and accelerator pedals
EP1154347B1 (fr) Mécanisme pour pédale
WO2006091347A1 (fr) Pédale pour véhicule motorisé
US6758114B2 (en) Electronic throttle control accelerator pedal mechanism with mechanical hysteresis provider
US6289763B1 (en) Electronic adjustable pedal assembly
US20070234842A1 (en) Electronic throttle control with hysteresis and kickdown
KR100851320B1 (ko) 답력 및 히스테리시스 조절기능을 갖춘 페달장치
US6367348B1 (en) Adjustable brake, clutch and accelerator pedals
EP1154345B1 (fr) Dispositif de pedale d'automobile
US20100077886A1 (en) Accelerator Pedal for a Vehicle
EP0990782B1 (fr) Mecanisme de pedale d'accelerateur pour vehicule
US6276229B1 (en) Gas-pedal module
KR100395738B1 (ko) 조절가능한 페달-평행한 나사와 로드
JPH0343633A (ja) アクセルペダル装置
JP4742397B2 (ja) 自動車のペダル装置及びこれに用いられるダンパ
US6955103B2 (en) Kickdown member for pedal assembly
JP3807180B2 (ja) 自動車のペダル装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19980218

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT SE

17Q First examination report despatched

Effective date: 19980528

RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ADWEST DRIVER SYSTEMS LIMITED

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19991228