EP0040652A1 - Dispositif de commande pour un papillon disposé dans la conduite d'air comprimé d'un moteur diesel - Google Patents

Dispositif de commande pour un papillon disposé dans la conduite d'air comprimé d'un moteur diesel Download PDF

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Publication number
EP0040652A1
EP0040652A1 EP19800200490 EP80200490A EP0040652A1 EP 0040652 A1 EP0040652 A1 EP 0040652A1 EP 19800200490 EP19800200490 EP 19800200490 EP 80200490 A EP80200490 A EP 80200490A EP 0040652 A1 EP0040652 A1 EP 0040652A1
Authority
EP
European Patent Office
Prior art keywords
valve
piston
pressure
spring
oil
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.)
Ceased
Application number
EP19800200490
Other languages
German (de)
English (en)
Inventor
Reinhard Fried
Rudolf Heller
Heimo Hübner
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.)
BBC Brown Boveri AG Switzerland
Original Assignee
BBC Brown Boveri AG Switzerland
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 BBC Brown Boveri AG Switzerland filed Critical BBC Brown Boveri AG Switzerland
Priority to EP19800200490 priority Critical patent/EP0040652A1/fr
Publication of EP0040652A1 publication Critical patent/EP0040652A1/fr
Ceased 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
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B33/00—Engines characterised by provision of pumps for charging or scavenging
    • F02B33/32—Engines with pumps other than of reciprocating-piston type
    • F02B33/42—Engines with pumps other than of reciprocating-piston type with driven apparatus for immediate conversion of combustion gas pressure into pressure of fresh charge, e.g. with cell-type pressure exchangers
    • 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
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

Definitions

  • the invention relates to an actuator according to the preamble of claim 1.
  • shut-off valve in the opening direction can be actuated by a control piston loaded in this switching direction by the pressure in the charge air line against the force of a spring and can only be closed in the absence of oil pressure, which Shut-off valve can only be closed when the control piston is in the rest position, in which the air flap is closed, in the absence of oil pressure.
  • the object of the invention is to provide an actuator of the type mentioned, which is structurally simplified compared to the known actuator and thus also operational is safe and takes up a much smaller space.
  • the actuator should be attachable directly to the motor housing or to the intake air line near the air flap.
  • the 1 consists of an elongated housing 1, the one in the drawing the square section 2 shown on the right has a squared outer cross section to which a stepped cylinder section 3 is connected on the left.
  • the right housing section 2 is closed by a cover 4 which has a connection 5 to the charge air line in the flow direction in front of the air flap.
  • On one longitudinal side of the square housing section 2 are the two connections 6 and 7 for the oil feed line and the oil return line, both of which are not shown.
  • a membrane 9 is connected between the cover 4 and the housing section 2 and a housing insert 8.
  • the interior of the housing section 2 is cylindrical.
  • the housing insert part 8 is inserted with its cylindrical outer circumference tightly into the housing section 2.
  • the housing insert part 8 is designed as a sleeve open to the membrane 9, the bottom 10 of which has a central opening 11 which is surrounded by an edge forming a valve seat 12 on the inside of the sleeve.
  • In the cylindrical inner wall 13 of the housing insert part there is a circumferential groove 14, to which a bore 15 connects in connection with the connection 7 for the oil return line, not shown.
  • a square sleeve 16 is guided axially displaceably in the housing insert part 8 and is supported with its bottom 17 on the membrane 9. Instead of the groove 14, a corresponding groove can be provided on the circumference of the square sleeve 16.
  • a control piston 19 is guided axially displaceably within the square sleeve with cylindrical inner wall 18, which is open towards the bottom 10 of the housing insert part 8 and is loaded by a spring 20, which is supported on the bottom 10 of the housing insert part 8.
  • the control piston 19 has a central opening 21 and stops at a valve seat 12 facing projecting piston section a sealing washer 22, which forms a shut-off valve 12, 22 with the valve seat 12.
  • a sealing ring 24 is held, which is held here between the walls of the ring recess 23 and an inserted locking washer 25.
  • the bottom 10 of the housing insert 8 carries on its side facing away from the shut-off valve 12, 22 a sealing washer 26, which will be discussed in more detail below.
  • an actuating piston 27 is guided in the cylindrical interior, against which a spring 28 presses, which is supported on a housing base 29 with which the housing 1 is closed. In the drawn rest position of the actuating piston 27, it is pressed tightly against the sealing disk 26 on the bottom 10 of the housing insert part 8 by the force of the spring 28 with an axially projecting piston rim 30.
  • the actuating piston 27 delimits an actuation chamber 31, which in the rest position of the actuating piston only connects to a housing ring space 34 via a narrow bore 32 in connection with a connection bore 33 in the actuating piston 27, which is connected via a housing bore 35 to the connection 6 for the oil supply line .
  • actuation chamber 31 which in the rest position of the actuating piston only connects to a housing ring space 34 via a narrow bore 32 in connection with a connection bore 33 in the actuating piston 27, which is connected via a housing bore 35 to the connection 6 for the oil supply line .
  • Neither the oil feed line nor the oil return line are shown in the drawing. In this regard, reference is made to the already mentioned DE-OS 26 31 257.
  • a sealing ring 37 is used on the outer circumference of the adjusting piston 27 .
  • the adjusting piston 27 can be displaced against the force of the spring 28 up to a stop ring 38.
  • the piston stroke limited in this way is sufficient to bring the air flap (not shown) in the intake line from its closed position into the open position.
  • the air flap is fastened to a shaft on which a lever engages to pivot the air flap, which lever is connected to a Bowden cable, the free end of which is connected to a pressure piece 39 on which a spring 40 engages, which is also supported on the housing base 29 .
  • the Bowden cable not shown, engages through a central opening 41 in the housing base 29. In this opening 41, the outer jacket of the Bowden cable is held in a manner familiar to those skilled in the art, while the end of the Bowden cable itself is fastened in a central opening 42 of the pressure piece 39. In the illustrated rest position of the pressure piece near the actuating piston, the air flap is closed by the force of the spring 40.
  • the stop ring 38 advantageously also serves as wear protection for the two springs 28 and 40.
  • An additional wear protection 38 'for the spring 28 is located in a groove on the inner surface of the cylindrical piston guide 27' of the piston 27.
  • the engine draws in the required amount of air via a bypass valve when the air flap is closed.
  • the air flap As soon as the first ignitions of the engine take place, it pushes exhaust gases into an exhaust pipe with overpressure. These exhaust gases reach a charging device and start to operate it.
  • the charger is designed as a pressure wave device, as a result of the closed air flap, despite the connection in the charger from the exhaust pipe to the charge air pipe, no exhaust gas can be sucked into the latter, which would quickly suffocate the engine and bring it to a standstill.
  • a pressure therefore builds up in the loading chamber 31, which pushes the actuating piston against the force of the spring 28 to the stop ring 38 to the left and thereby opens the seat 30.
  • the actuating piston runs on the pressure piece 39, which engages for centering with projecting surfaces 43 in a central recess 44 on the actuating piston and, together with the actuating piston, is displaced to the left against the additional force of the spring 40.
  • the air flap not shown, is pivoted into its open position via the Bowden cable, likewise not shown, on the pressure piece.
  • shut-off valve 12, 22 After the start phase of the diesel engine has ended, After a first charge air pulse, the shut-off valve 12, 22 is closed, thereby displacing the actuating piston to open the air plate. The air damper then remains open as long as the engine is running, ie there is sufficient oil pressure at port 6, since the shut-off valve 12, 22 remains closed.
  • the oil pressure at port 6 breaks down.
  • the relaxing springs 40 and 28 push the actuating piston in the direction of its rest position, the oil being pressed out of the pressurization chamber and the open shut-off valve 12, 22 into the oil return line at connection 7.
  • a bore 45 is provided in the control piston, due to which the shut-off valve 12, 22 goes quickly and safely into the open position when the oil pressure at port 6 collapses. Accordingly, the oil can be rapidly removed from the pressurization chamber 31 via the connection 7, so that the actuating piston and the pressure piece can be returned to their illustrated rest positions, in which the air flap is closed.
  • the actuator is thus again in the initial position shown and the air flap is only controlled into the open position after the engine has started again by emitting a specific charge air pulse to port 5.
  • FIG. 2 and 3 show a further actuator according to the invention, the control part of which is designed in accordance with the exemplary embodiment according to FIG. 1. Corresponding parts of the two embodiments are therefore with the provided with the same reference numerals.
  • the difference between the exemplary embodiment according to FIGS. 2 and 3 compared to the described exemplary embodiment according to FIG. 1 consists primarily in the fact that the actuating piston 27 does not actuate a Bowden cable, but rather acts on a lever on a shaft 46 on which the air flap 47 in the air intake pipe is held pivotable.
  • the shaft is mounted in the housing 1 of the actuator, which is integral with a pipe section 48 of the charge air line which has the air flap.
  • the pipe section is provided on both sides of the air flap with flanges 49 for connection to the charge air line.
  • a spiral spring 50 acts on the shaft and is supported in a housing cover 51 which is held laterally on the housing 1 of the actuating device.
  • the spring 50 is arranged and designed such that the air flap 47 is held in its closed position by spring force.
  • the spring 50 thus corresponds to the spring 40 in FIG. 1.
  • the housing cover also serves to slide the shaft end.
  • the actuating piston 27 For the passage of the shaft 46 and for the rotation of the shaft 46 via the lever 45 against the force of the spring 50, the actuating piston 27 has a longitudinal slot 52. The stroke of the actuating piston 27 is set by a screw 53 in the housing base 29.
  • bores 54, 55 are provided in the housing 1 or in the tubular jacket of the charge air line section.
  • Port 6 for the oil feed line and port 7 for the oil return line are offset by 90 ° in the present example.
  • the actuator Since the actuator is arranged directly on the charge air line here, special power must be supplied from the engine to connections 6 and 7, which is not necessary in the exemplary embodiment according to FIG. 1, since here the actuator is attached directly to the engine housing with its adjacent connections, with connections 6 and 7 connecting to oil inlet and outlet bores.
  • a special air line must be routed from the charge air line to the air connection 5 here.
  • the square sleeve has a groove 14 'on its outer circumference, which corresponds to the groove 14 in FIG. 1.
  • the spring 28 for returning the actuating piston 27 to its rest position is supported according to FIGS. 2 and 3 by a cap-like part 56 on the actuating piston 27. It is clear that the spring 28 can be provided with a corresponding wear protection according to FIG. 1.
  • the actuating device according to FIGS. 2 and 3 works in the same way as the actuating device according to FIG. 1, so that a further functional description is not necessary.
  • the housing insert part 8 can also be in one piece with the housing section 2.
  • the design of the sleeve 16 and the control piston 19 can be carried out in different ways, provided the condition is met that when the shut-off valve 12, 22 is open, the connection of the pressurization chamber 31 to the oil return line is released and is not limited by the sleeve 16. Furthermore, it must be ensured that when the shut-off valve is closed, the pressurization chamber 31 is essentially sealed off from the oil return line.
  • the bore 45 in the control piston 19 is to be dimensioned so narrowly that it cannot lead to an opening of the shut-off valve 12, 22 in the presence of oil pressure in the supply line, but does contribute to the rapid opening of the shut-off valve 12, 22 when the oil pressure collapses.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
EP19800200490 1980-05-23 1980-05-23 Dispositif de commande pour un papillon disposé dans la conduite d'air comprimé d'un moteur diesel Ceased EP0040652A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19800200490 EP0040652A1 (fr) 1980-05-23 1980-05-23 Dispositif de commande pour un papillon disposé dans la conduite d'air comprimé d'un moteur diesel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19800200490 EP0040652A1 (fr) 1980-05-23 1980-05-23 Dispositif de commande pour un papillon disposé dans la conduite d'air comprimé d'un moteur diesel

Publications (1)

Publication Number Publication Date
EP0040652A1 true EP0040652A1 (fr) 1981-12-02

Family

ID=8187005

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800200490 Ceased EP0040652A1 (fr) 1980-05-23 1980-05-23 Dispositif de commande pour un papillon disposé dans la conduite d'air comprimé d'un moteur diesel

Country Status (1)

Country Link
EP (1) EP0040652A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2230036A (en) * 1938-08-31 1941-01-28 Messerschmitt Boelkow Blohm Regulator for internal combustion engines
DE2607989A1 (de) * 1975-12-31 1977-07-14 Bbc Brown Boveri & Cie Verfahren zum starten eines aufgeladenen verbrennungsmotors und einrichtung zur durchfuehrung des verfahrens
DE2631257A1 (de) * 1976-07-12 1978-01-26 Bbc Brown Boveri & Cie Stellgeraet fuer eine in der ladeluftleitung eines dieselmotors angeordnete luftklappe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2230036A (en) * 1938-08-31 1941-01-28 Messerschmitt Boelkow Blohm Regulator for internal combustion engines
DE2607989A1 (de) * 1975-12-31 1977-07-14 Bbc Brown Boveri & Cie Verfahren zum starten eines aufgeladenen verbrennungsmotors und einrichtung zur durchfuehrung des verfahrens
FR2337257A1 (fr) * 1975-12-31 1977-07-29 Bbc Brown Boveri & Cie Procede pour le demarrage d'un moteur a combustion suralimente et dispositif pour la realisation de ce procede
DE2631257A1 (de) * 1976-07-12 1978-01-26 Bbc Brown Boveri & Cie Stellgeraet fuer eine in der ladeluftleitung eines dieselmotors angeordnete luftklappe

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

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17P Request for examination filed

Effective date: 19810328

AK Designated contracting states

Designated state(s): AT CH GB

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

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18R Application refused

Effective date: 19831209

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HUEBNER, HEIMO

Inventor name: FRIED, REINHARD

Inventor name: HELLER, RUDOLF