EP0031261B1 - Vorrichtung zur automatischen Steuerung des Schliessens eines Dekompressionsventiles einer Brennkraftmaschine - Google Patents

Vorrichtung zur automatischen Steuerung des Schliessens eines Dekompressionsventiles einer Brennkraftmaschine Download PDF

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Publication number
EP0031261B1
EP0031261B1 EP80401640A EP80401640A EP0031261B1 EP 0031261 B1 EP0031261 B1 EP 0031261B1 EP 80401640 A EP80401640 A EP 80401640A EP 80401640 A EP80401640 A EP 80401640A EP 0031261 B1 EP0031261 B1 EP 0031261B1
Authority
EP
European Patent Office
Prior art keywords
valve
closing
shaft
spring
decompression
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.)
Expired
Application number
EP80401640A
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English (en)
French (fr)
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EP0031261A1 (de
Inventor
Marc Perrin
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.)
Peugeot Cycles SA
Original Assignee
Peugeot Cycles SA
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 Peugeot Cycles SA filed Critical Peugeot Cycles SA
Priority to AT80401640T priority Critical patent/ATE5345T1/de
Publication of EP0031261A1 publication Critical patent/EP0031261A1/de
Application granted granted Critical
Publication of EP0031261B1 publication Critical patent/EP0031261B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/08—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for decompression, e.g. during starting; for changing compression ratio

Definitions

  • DE-B-1 069932 describes a decompression device intended to facilitate this starting maneuver.
  • This device comprises a cam blocking the valve control, which is immobilized by a pivoting lever driven laterally during the rotation of the engine and released after a determined stroke of this lever. An appropriate adjustment of the valve closure is thus obtained, which takes place only after starting.
  • Such a device is however difficult to adapt to two-wheeled vehicles, or the like, due in particular to its complexity and its relative fragility.
  • the present invention therefore aims to provide an automatic control ensuring the closure of the decompression valve, after a determined number of engine rotation turns, which is simpler and more robust while being extremely precise.
  • the object of this invention is in fact an automatic control device for closing the decompression valve, characterized in that it comprises a finger which, at rest, covers the end of a shaft integral in rotation with the engine and provided of a peripheral helical groove, and is free to tilt laterally under the opposite actions of the decompression control and the closing spring of the decompression valve, and which is also articulated relative to its tilting plane and constantly elastically spread from this plane towards the shaft, so that when the decompression command is requested, it rocks and is applied laterally by the closing spring against the helical groove of the shaft which prevents the closing action of the spring, then is moved axially by the rotation of the helical groove until it returns to the end of the shaft, which allows it to tilt, releases the spring and triggers the closing of the valve.
  • the device for controlling the decompression valve of an internal combustion engine mounted on a moped, or the like comprises a lever 1 which controls a cable 2 and is articulated on the handlebar 4 of the vehicle, near a control handle 5.
  • the valve or more precisely the spring which returns it to the closed position, is connected to a control cable 6.
  • the cylinder head 8 of the engine is pierced with a bore 10 which communicates on the one hand with the combustion chamber 12 and, on the other hand, with a duct 14 for venting.
  • the communication between the bore 10 and the combustion chamber 12 is controlled by a valve 16 secured to a rod 18, which slides in a guide 20 secured to the cylinder head 8.
  • a hairpin spring 22 is mounted between the guide 20 and a lever 24 which is fixed, on the one hand to the end of the rod 18, and on the other hand to the end of the cable 6. As shown in FIG. 1, the spring 22 thus constantly recalls the valve 16 in its closed position.
  • the two control cables 2 and 6 are fixed at the two ends 25 and 27 respectively, of a plate 26 capable of tilting parallel to itself around an axis 28 placed at equal distance from the two points 25 and 27.
  • the plate 26 On one of its faces, the plate 26 carries a yoke crossed by an axis 31, around which a finger 32 is articulated (fig. 2). A spring 24 bears, on the one hand on the plate 26 and, on the other hand, on the finger 32 and tends to separate these two members from one another.
  • this shaft 35 is constituted by an extension of the crankshaft 36 of the engine.
  • This shaft 35 is carried by a fixed bearing 38 and comprises, between this bearing 38 and its end, a helical groove 40 which can for example constitute a screw thread.
  • the pilot presses on the lever 1 and thus pulls the cable 2, it causes a lateral tilting of the plate 26 around the axis 28.
  • the finger 32 is driven in this tilting movement and also pivots around the axis 28. Consequently, the tip 33 of this finger 32 which covered the end of the shaft 35 emerges laterally from this shaft and, as a result, is pushed back by the spring 34 until it contacts the bearing 38, that is to say in fact up to the end of the helical groove 40.
  • the tilting of the plate 26 exerted traction on the cable 6 and thus caused the spring branches 22, c '' i.e. the opening of the valve 16 (fig. 5).
  • the motor automatically performed a determined number of revolutions before the valve 16 closed.
  • An appropriate choice of the number of turns the groove 40 allows the engine to perform, before closing the valve 16, a sufficient number of revolutions for its launch, so that it can then easily start.
  • the clevis 30 for supporting the finger 32 is situated at an intermediate point between the axis 28 of the plate 26 and the point 25 for fixing the cable 2.
  • the tip 33 of finger 32 comes into contact with groove 40 at a point which is also on the same side as point 25 with respect to the plane passing through pivot axis 28 and through axis of shaft 35. All tilting of the plate 26 in the direction of the cable 6 is thus completely prohibited as long as the engine has not performed the desired number of revolutions.
  • the pilot is absolutely sure that the decompression valve will be closed exactly when necessary and he has no particular maneuver to perform, the only command of the lever 1 automatically and successively causing the opening and closing of this valve.
  • control device thus produced is extremely simple while being perfectly safe, which makes it particularly suitable for mopeds or other two-wheeled vehicles.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Claims (5)

1. Vorrichtung zur automatischen Steuerung des Schließens des Dekompressionsventils einer Brennkraftmaschine, mit einem Organ (1) zur Steuerung der Dekompression und einer Feder (22) zur Rückstellung des Dekompressionsventils in die Schließstellung, gekennzeichnet, durch einen Finger (32), der in Ruhestellung das Ende einer Welle (35) bedeckt, die zusammen mit der Brennkraftmaschine rotiert und mit einer schraubenförmigen Umfangsnut (40) versehen ist, unter den entgegengesetzten Wirkungen der Dekompressionssteuerung und der Feder (22) zum Schließen des Dekompressionsventils (16) frei schwenkbar ist und außerdem bezüglich seiner Schwenkebene angelenkt und von dieser Ebene in Richtung der Welle derart elastisch beaufschlagt ist, daß er bei betätigter Dekompressionssteuerung schwenkt und durch die Schließfeder (22) seitlich an die schraubenförmige Nut (40) der Welle (35) gedrückt wird, was die Schließbewegung der Feder (22) verhindert, wonach er durch die Drehung der schraubenförmigen Nut (40) axial verschoben wird, bis zu seiner Rückkehr am Ende der Welle, was sein Schwenken ermöglicht, die Feder (22) freigibt und das Schließen des Dekompressionsventils auslöst.
2. Vorrichtung nach Anspruch 1, gekennzeichnet, durch eine Platte, die seitlich in ihrer Ebene schwenkbar und beiderseits ihrer Drehachse mit der Schließfeder des Dekompressionsventils bzw. mit der Dekompressionssteuerung verbunden ist, wobei der Finger (32) auf der der schraubenförmigen Nut zugewandten Seite der Platte angelenkt ist.
3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß der Finger (32) an der Platte (26) zwischen deren Drehachse und deren Verbindung mit der Dekompressionssteuerung angelenkt ist.
4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die schraubenförmige Nut ein Gewinde ist.
5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das schwenkbare Organ einerseits mit der Schließfeder des Ventils und andererseits mit der Dekompressionssteuerung durch Seile verbunden ist.
EP80401640A 1979-12-14 1980-11-17 Vorrichtung zur automatischen Steuerung des Schliessens eines Dekompressionsventiles einer Brennkraftmaschine Expired EP0031261B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80401640T ATE5345T1 (de) 1979-12-14 1980-11-17 Vorrichtung zur automatischen steuerung des schliessens eines dekompressionsventiles einer brennkraftmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7930752 1979-12-14
FR7930752A FR2471475A1 (fr) 1979-12-14 1979-12-14 Dispositif de commande automatique de la fermeture de la soupape de decompression d'un moteur a explosion

Publications (2)

Publication Number Publication Date
EP0031261A1 EP0031261A1 (de) 1981-07-01
EP0031261B1 true EP0031261B1 (de) 1983-11-16

Family

ID=9232806

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80401640A Expired EP0031261B1 (de) 1979-12-14 1980-11-17 Vorrichtung zur automatischen Steuerung des Schliessens eines Dekompressionsventiles einer Brennkraftmaschine

Country Status (7)

Country Link
US (1) US4369741A (de)
EP (1) EP0031261B1 (de)
JP (1) JPS5698537A (de)
AT (1) ATE5345T1 (de)
DE (1) DE3065635D1 (de)
ES (1) ES255329Y (de)
FR (1) FR2471475A1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE455008B (sv) * 1983-05-16 1988-06-13 Yanmar Diesel Engine Co For styrning av brenslemengden avsedd anordning pa dieselmotor med vertikal vevaxel
JPS6014252U (ja) * 1983-07-08 1985-01-30 本田技研工業株式会社 内燃機関のデコンプ装置
US6000370A (en) * 1997-11-20 1999-12-14 Ryobi North America, Inc. Compression release mechanism for an internal combustion engine
US6415747B1 (en) * 1998-06-19 2002-07-09 Yamaha Hatsudoki Kabushiki Kaisha Two stroke, multiple cylinder engine for small vehicle
US6547021B1 (en) * 2000-11-22 2003-04-15 Yamaha Hatsudoki Kabushiki Kaisha Decompression arrangement for land vehicle
JP2002303110A (ja) 2001-04-05 2002-10-18 Yamaha Motor Co Ltd エンジンのデコンプ装置
CN103362590B (zh) * 2013-05-08 2015-05-13 浙江日晟农林科技有限公司 发动机启动减压机构

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1069932B (de) * 1959-11-26 Motoren-Werke Mannheim A.G. vorm. Benz Abt. Stat. Motorenbau, Mannheim Dekompressionsvon'ichtung
US1749152A (en) * 1921-03-25 1930-03-04 Muller Friedrich Starting mechanism for internal-combustion engines
GB347553A (en) * 1929-11-07 1931-04-30 Hannoversche Maschb Ag Improvements in or relating to starting devices for internal combustion engines
US2016846A (en) * 1931-03-30 1935-10-08 Eclipse Aviat Corp Internal combustion engine
FR865039A (fr) * 1939-04-27 1941-05-12 Suisse Construction Locomotive Dispositif décompresseur pour moteurs à combustion interne
US2947300A (en) * 1957-05-31 1960-08-02 Outboard Marine Corp Starter-controlled engine compression relief
FR1187191A (fr) * 1957-11-15 1959-09-08 Peugeot Cycles Moteur à explosion à décompresseur de démarrage
JPS5335829A (en) * 1976-09-14 1978-04-03 Honda Motor Co Ltd Decompressing device to be used for motor bicycle and the like
JPS5443213Y2 (de) * 1976-12-13 1979-12-14

Also Published As

Publication number Publication date
ES255329U (es) 1981-09-16
EP0031261A1 (de) 1981-07-01
ES255329Y (es) 1982-03-01
FR2471475B1 (de) 1983-02-25
ATE5345T1 (de) 1983-12-15
US4369741A (en) 1983-01-25
DE3065635D1 (en) 1983-12-22
FR2471475A1 (fr) 1981-06-19
JPS5698537A (en) 1981-08-08

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