EP0012450B1 - Dispositif pour éviter la survitesse dans un moteur à injection de carburant - Google Patents

Dispositif pour éviter la survitesse dans un moteur à injection de carburant Download PDF

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Publication number
EP0012450B1
EP0012450B1 EP79105251A EP79105251A EP0012450B1 EP 0012450 B1 EP0012450 B1 EP 0012450B1 EP 79105251 A EP79105251 A EP 79105251A EP 79105251 A EP79105251 A EP 79105251A EP 0012450 B1 EP0012450 B1 EP 0012450B1
Authority
EP
European Patent Office
Prior art keywords
supply line
valve
air
motor
axis
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
EP79105251A
Other languages
German (de)
English (en)
Other versions
EP0012450A1 (fr
Inventor
Roman Mieczyslaw Dr. Ing.-Mech. Blocki
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.)
Wytwornia Silnikow Wysokopreznych "PZL-Andrychow"
Original Assignee
Wytwornia Silnikow Wysokopreznych "PZL-Andrychow"
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
Priority claimed from PL21187278A external-priority patent/PL120909B1/pl
Priority claimed from PL21845579A external-priority patent/PL124148B3/pl
Application filed by Wytwornia Silnikow Wysokopreznych "PZL-Andrychow" filed Critical Wytwornia Silnikow Wysokopreznych "PZL-Andrychow"
Priority to AT79105251T priority Critical patent/ATE3664T1/de
Publication of EP0012450A1 publication Critical patent/EP0012450A1/fr
Application granted granted Critical
Publication of EP0012450B1 publication Critical patent/EP0012450B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D17/00—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling
    • F02D17/04—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling rendering engines inoperative or idling, e.g. caused by abnormal conditions

Definitions

  • the invention relates to a device for securing a fuel injection internal combustion engine against overturning, which comprises a shut-off element arranged in the form of a pivotable flap and arranged in the air supply line of the engine Air flowing through the supply line of the motor is shifted into the shut-off position, while it remains in the open position in the case of wire numbers lower than the maximum permissible speed and thus under the determined dynamic pressure of the air flowing through the supply line of the motor, in which it is at an angle ⁇ to the axis the supply line.
  • the shut-off element is designed in the form of a dynamic pressure valve, on which a spring acts in order to hold the valve in the open position.
  • the valve cone is arranged in such a way that it enables an axial displacement to the supply line.
  • the valve cone If the engine exceeds the maximum permissible speed and the spring resistance is overcome as a result of the air acting on the cone of the valve and flowing in the supply line of the motor, the valve cone is moved into the shut-off position, whereas in the case where the speed is less than the maximum permissible speed, ie under a certain back pressure of the intake air, the valve is held in the open position by the spring.
  • the shut-off element can have the shape of a pivotable flap.
  • a disadvantage of the first exemplary embodiment of the known securing device described above is that the spring resistance increases during the displacement of the valve cone into the shut-off position, which increases the time for the locking process of the valve. If, in the second exemplary embodiment, the pivotable flap interacts with the spring in a manner comparable to that in the first exemplary embodiment, the above-mentioned disadvantage is also present here.
  • shut-off element In the known construction, overall it is not guaranteed in all cases that the shut-off element actually comes into the closed position in the event of an impending overturning of the engine, with the result that only a partial throttling of the flow of the intake air takes place, so that the engine continues to run with a considerable lack of air and therefore heavy smoking occurs with the known harmful effects on the engine.
  • the object of the invention is to develop a device for securing a fuel injection internal combustion engine against over-revving, in which the shut-off element arranged in the form of a pivotable flap in the air supply line of the engine always closes quickly and safely in all cases.
  • a safety device of the type described above in that the axis of rotation of the pivotable flap forming the shut-off element is arranged perpendicular to the axis of the supply line and at a certain distance from this axis of the supply line, and in that the pivotable flap is coupled with a lever, acts on a tension spring such that the torque exerted on the flap by this tension spring during normal operation of the engine keeps the flap at an angle a to the axis of the supply line against the torque exerted by the dynamic pressure of the air on the flap, that also in the first phase of the movement of the flap in the shut-off position, the torque generated by the tension spring counteracts the torque resulting from the dynamic pressure of the air, and in the final phase of the movement of the flap in the shut-off position, the torque generated by the tension spring in the same direction acts as that of the dynamic Air pressure resulting torque.
  • the measures according to the invention ensure that, on the one hand, in the final phase of the closing movement of the flap, the flap is closed very quickly due to the interaction of the torque generated by the tension spring and the torque resulting from the dynamic pressure of the air. Furthermore, due to the interaction of the two torques, the flap is always securely closed. Both advantages are obtained with an extremely simple construction of the device according to the invention.
  • the shut-off element arranged in the feed line of the engine is also designed in the form of a pivotable flap, the axis of rotation of which is arranged perpendicular to the axis of the feed line and at a certain distance from this axis.
  • the flap is not controlled directly by the dynamic pressure of the intake air, but from the outside with the help of a special device (FR-A-1 553 089).
  • a shut-off device is arranged in the air supply line 1 of the engine, specifically in the form of a pivotable flap 2, which is placed on a shaft 3 mounted in bores formed in the walls of the supply line.
  • the shaft 3 runs vertically and at a certain distance from the axis of the feed line 1.
  • a lever 4 connected to a tension spring 5 is also mounted on the shaft 3.
  • the feed line 1 is provided with a constriction, the surface perpendicular to the axis of the feed line 1 forming a support surface 6 for the flap 2.
  • the flap 2 Under the action of the tension spring 5 and a stop 7 against which the lever is supported, is arranged at an angle a to the axis of the feed line 1, it being advantageous if the angle ⁇ is as small as possible in order to keep the air flow resistances in the supply line 1 of the engine as low as possible.
  • the variant of the safety device according to the invention shown in FIG. 3 is equipped with a pneumatic cylinder in the form of a bellows 8, the interior of which is connected via line 10 to the supply line 1 of the motor. Furthermore, one bottom of the bellows 8 is connected to the lever 4 of the flap 2 by means of a plunger 9, while the other bottom of the bellows is arranged in a stationary manner.
  • a pneumatic cylinder of a different type can of course be used, e.g. Piston or membrane cylinder.
  • the bellows 8 filled with the air feeding the motor exerts a certain force on the lever 4.
  • the magnitude of this force depends on the pressure and thus also on the density of the supply air, which is variable in a loading motor.
  • the bellows 8 is connected to the lever 4 such that the direction of action of the torque caused by the force exerted by the bellows 8 on the lever 4 corresponds to the direction of action of the torque caused by the force exerted by the tension spring 5 on the lever.
  • the bellows 8 is designed so that at the maximum permissible speed of the engine, the summary of the torque coming from the bellows 8 and the tension spring 5 on the lever 4 by the dynamic pressure of the air on the flap 2 regardless of the air density in the torque caused by the feed line 1 of the motor is approximately the same. This compensates for the influence of the density of the air feeding the engine.
  • FIG. 3 The operation of the embodiment of FIG. 3 is otherwise the same as the safety device shown in FIGS. 1 and 2.
  • the device according to the invention can be used both for engines during tests on an engine test bench and for engines working in vehicles and work machines.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Claims (3)

1. Dispositif de protection contre le sur- régime d'un moteur à explosion à injection de carburant, comprenant un organe d'arrêt qui est réalisé sous la forme d'un clapet pivotant (2), qui est monté dans le conduit d'admission d'air (1) du moteur et qui, lors du dépassement du régime maximal admissible du moteur, est amené en position de fermeture sous l'effet de la pression dynamique de l'air traversant le conduit d'admission du moteur, tandis qu'à des régimes inférieurs au régime maximal admissible et donc en-dessous d'une pression dynamique déterminée de l'air traversant le conduit d'admission du moteur, il reste en position ouverte dans laquelle il fait un angle (a) par rapport à l'axe du conduit d'admission, caractérisé par le fait que l'axe de rotation (3) du clapet pivotant (2) constituant l'organe d'arrêt, est disposé perpendiculairement à l'axe du conduit d'admission (2) et à une distance déterminée de cet axe du conduit d'admission (1) et que le clapet pivotant (2) est accouplé à un levier (4) sur lequel un ressort de traction (5) agit de manière que le moment exercé sur le clapet (2) par ce ressort de traction (5) maintienne, pendant le fonctionnement normal du moteur, le clapet (2) à l'encontre du moment exercé sur le clapet par la pression dynamique de l'air, sous un angle (a) par rapport au conduit d'admission, que dans la première phase du mouvement du clapet (2) vers la position d'arrêt, le moment exercé par le ressort de traction (5) agisse également encore à l'encontre du moment provenant de la pression dynamique de l'air, et que dans la phase finale du mouvement du clapet (2) vers la position d'arrêt, le moment exercé par le ressort de traction (5) agisse par contre dans le même sens que le moment provenant de la pression dynamique de l'air.
2. Dispositif suivant la revendication 1, caractérisé par le fait qu'il comprend un vérin pneumatique (8) qui est accouplé mécaniquement au levier (4) du clapet (2) et présente une communication pneumatique avec le conduit d'admission (1).
3. Dispositif suivant la revendication 2, caractérisé par le fait que le vérin pneumatique est constitué par un soufflet (8) dont un fond coopère, à l'aide d'un poussoir (9), avec le levier (4) du clapet (2) et dont l'espace intérieur est en communication avec le conduit d'admission (1) du moteur.
EP79105251A 1978-12-18 1979-12-18 Dispositif pour éviter la survitesse dans un moteur à injection de carburant Expired EP0012450B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79105251T ATE3664T1 (de) 1978-12-18 1979-12-18 Vorrichtung zur sicherung eines kraftstoffeinspritz-verbrennungsmotors vor einem ueberdrehen.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
PL211872 1978-12-18
PL21187278A PL120909B1 (en) 1978-12-18 1978-12-18 Apparatus protecting an injection-type internal compustion engine against overspeedingja s vpryskom topliva ot raznosa
PL21845579A PL124148B3 (en) 1979-09-22 1979-09-22 Apparatus for protecting an injected fuel internal combustion engine against overspeeding
PL218455 1979-09-22

Publications (2)

Publication Number Publication Date
EP0012450A1 EP0012450A1 (fr) 1980-06-25
EP0012450B1 true EP0012450B1 (fr) 1983-06-01

Family

ID=26652909

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79105251A Expired EP0012450B1 (fr) 1978-12-18 1979-12-18 Dispositif pour éviter la survitesse dans un moteur à injection de carburant

Country Status (3)

Country Link
US (1) US4323040A (fr)
EP (1) EP0012450B1 (fr)
DE (1) DE2965596D1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3406119A1 (de) * 1984-02-21 1985-08-22 Fa. Andreas Stihl, 7050 Waiblingen Zweitaktmotor
DE3509540A1 (de) * 1985-03-16 1986-09-18 Fa. Andreas Stihl, 7050 Waiblingen Zweitaktmotor
JPH0738664Y2 (ja) * 1989-12-01 1995-09-06 富士重工業株式会社 エンジンの保護装置
JPH09151753A (ja) * 1995-11-28 1997-06-10 Sanshin Ind Co Ltd 触媒付き２サイクルエンジン

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR327192A (fr) * 1902-12-10 1903-06-16 Laillault Desire Leopold Un mode de régulation de la vitesse des moteurs à explosions
US1481792A (en) * 1922-03-29 1924-01-29 Harold S Dailey Governor for gas engines
US2100550A (en) * 1934-11-20 1937-11-30 Texas Co Emergency shut-off valve
US2415505A (en) * 1944-10-19 1947-02-11 Mallory Marion Device for throttling internalcombustion engines
US2479257A (en) * 1946-07-29 1949-08-16 C F Strover Vacuum operated governor for gas motors
FR1016247A (fr) * 1950-04-13 1952-11-05 Fr De Materiel Agricole Et Ind Dispositif automatique d'arrêt en cas de survitesse pour moteurs, notamment pour moteurs semi-diesel
GB720431A (en) * 1952-07-11 1954-12-22 Davey Paxman And Company Ltd Improvements in or relating to means for automatically stopping internal combustion engines
US2731001A (en) * 1952-12-26 1956-01-17 Gen Motors Corp Engine safety shut-down device
CH320071A (de) * 1953-04-04 1957-03-15 Maschf Augsburg Nuernberg Ag Einrichtung zum selbsttätigen Abstellen von Brennkraftmaschinen bei Überdrehzahl
DE1183312B (de) * 1961-06-28 1964-12-10 Kloeckner Humboldt Deutz Ag Sicherheitseinrichtung fuer in brand- oder explosionsgefaehrdeter Umgebung eingesetzte selbstzuendende Einspritzbrennkraftmaschinen
FR1316594A (fr) * 1961-12-19 1963-02-01 Clapet obturateur
FR1553089A (fr) * 1967-11-30 1969-01-10
DE2127453C2 (de) * 1970-06-05 1985-04-04 Exxon Research and Engineering Co., Linden, N.J. Sicherheitseinrichtung für eine Verbrennungskraftmaschine
US4092970A (en) * 1970-06-05 1978-06-06 Exxon Research And Engineering Company Controlling internal combustion engines
GB1392048A (en) * 1972-01-12 1975-04-23 Hill Rotherham Ltd Thomas Diesel engines
DD100996A1 (fr) * 1972-07-18 1973-10-12
FR2235291B1 (fr) * 1973-06-26 1977-09-16 Semt
US3960123A (en) * 1974-10-04 1976-06-01 Berninger Kenneth L Engine speed maintaining apparatus

Also Published As

Publication number Publication date
US4323040A (en) 1982-04-06
EP0012450A1 (fr) 1980-06-25
DE2965596D1 (en) 1983-07-07

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