EP0028745A1 - Dispositif de commande pour un papillon disposé dans la conduite d'air comprimé d'un moteur à combustion - Google Patents

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

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Publication number
EP0028745A1
EP0028745A1 EP80106522A EP80106522A EP0028745A1 EP 0028745 A1 EP0028745 A1 EP 0028745A1 EP 80106522 A EP80106522 A EP 80106522A EP 80106522 A EP80106522 A EP 80106522A EP 0028745 A1 EP0028745 A1 EP 0028745A1
Authority
EP
European Patent Office
Prior art keywords
air flap
air
flap
open position
actuator 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.)
Granted
Application number
EP80106522A
Other languages
German (de)
English (en)
Other versions
EP0028745B1 (fr
Inventor
Reinhard Fried
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.)
Knorr Bremse AG
Original Assignee
Knorr Bremse GmbH
BBC Brown Boveri AG Switzerland
Knorr Bremse AG
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 Knorr Bremse GmbH, BBC Brown Boveri AG Switzerland, Knorr Bremse AG filed Critical Knorr Bremse GmbH
Priority to AT80106522T priority Critical patent/ATE5610T1/de
Publication of EP0028745A1 publication Critical patent/EP0028745A1/fr
Application granted granted Critical
Publication of EP0028745B1 publication Critical patent/EP0028745B1/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
    • 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

Definitions

  • the invention relates to an actuator according to the preamble of claim 1.
  • an air flap in the charge air line which closes at least until the diesel engine starts and at the latest when the idling speed is exceeded after the starting process for the entire subsequent life of the diesel engine until it is switched off is open.
  • an air flap arranged and operated in this way is required, since otherwise, due to the transitions between charge air and exhaust gas circuits present here, exhaust gases flow into the charge air line during the start-up phase of the first work cycles of the diesel engine and the diesel engine immediately comes to a standstill again can bring.
  • the spring can also be a bimetallic spring which is selected such that the air flap only goes into the closed position after the motor has been stopped when the motor has cooled to a preselected temperature.
  • the object of the invention is to provide an actuator of the type mentioned, which serves the same purpose as the known and the proposed actuator, but which is significantly simplified in terms of its structure and function, which not only requires less space with less expensive manufacture and Assembly, but also increased functional reliability results.
  • the device by means of which the air flap can be moved into the open position and / or the device by means of which the open air flap is held the air flap in the open position should be considerably simplified. The object is achieved with the characterizing features of claim 1.
  • a diesel engine not shown, is designated by 1.
  • an intake line 3 leads to a charging device 4, which is connected to the engine 1 on the one hand via a charge air line 5 and on the other hand via an exhaust line 6.
  • the exhaust gases can flow out of the charging device 4 to the atmosphere through a line 7.
  • the actuator described in more detail below controls the air flap in a rest (blocking) position in which the air passage through the charge air line 5 is blocked, and in a working (opening) position in which the charge air line 5 for passage is released from compressed air.
  • a sniffing or bypass valve 10 is arranged behind the air flap 8, via which atmospheric air is drawn in by the engine 1 when the air flap 8 is closed from a certain negative pressure in the section of the charge air line 5 leading to the engine 1.
  • the charging device 4 can be of any type, preferably it is a pressure wave charging device in which the exhaust energy contained in the former is used to compress the latter without strictly defined separation of exhaust gas and charging air.
  • the mechanical drive of the charging device 4 required for this is not shown in FIG. 1.
  • Fig. 2 shows the pipe section 9 compared to Fig. 1 in an enlarged view and in section.
  • the air flap 8 is pivotally mounted about the axis 11.
  • the air flap 8 is drawn in solid lines in the locked position and in dashed lines in the open position.
  • the axis 11 is arranged in such a way that the air flap comes to lie parallel and close to the inner wall of the tube section 9 on the left in the drawing in the fully open position.
  • the air flap is held in the locked position shown by means of a spring, not shown. On the other hand, the air flap is moved against the spring force by the charge air pressure into the open position, which acts in the direction of arrow 12 against the air flap.
  • the motor sucks in fresh air via the snifting valve 10.
  • ferromagnetic plate 13 On the air flap there is a ferromagnetic plate 13 which, in the open position of the air flap, lies opposite one end of an electromagnet 14 which penetrates the wall of the tubular body with its iron core.
  • the electromagnet is switched on in the ignition circuit, not shown, of the vehicle.
  • the air flap is held in its open position by the electromagnet 14. If the ignition circuit is interrupted by switching off the engine, the magnetic field of the electromagnet breaks down and the air flap is pivoted back into its blocking position by the spring force acting on it.
  • the electromagnet is connected to the ignition circuit via a thermal switch 15.
  • the thermal switch is set so that it only closes the circuit when the engine is running when the engine or the exhaust gases have reached a predetermined temperature.
  • the thermal switch only switches the electromagnet off from the voltage source after the motor has been stopped when it has cooled below the specified temperature. In this way, the hot engine can be briefly switched off or stalled without the air flap 8 closing immediately.
  • the air flap 8 is eccentric with respect to its flap surface and, according to FIG. 2, is mounted on one of its outer edges, then it is clear that the air flap must be limited by parallel side edges in the pivoting plane.
  • the pipe section 9 in which the air flap is to assume a position that closes the pipe section and a position that is essentially released, cannot be round.
  • the pipe section 9 must be specially adapted at least in the pivoting range of the flap, which, however, is not a design problem. It may be expedient to move the mounting of the flap axis or the flap shaft 11 not to the outermost surface edge of the flap, but rather to the center, but a sufficient distance from the center of the flap must be maintained, without which the flap is not exposed to the charge air pressure can be moved into the open position.
  • a flap bearing is shown in FIGS. 3 to 5, the flap 8 also being drawn in solid lines in its final position and in broken lines in the open position.
  • the flaps 8 are each held in the closed position by a spring force, as in FIG. 1.
  • the flaps 8 can thus only be pivoted against the spring force into their full opening position, indicated by dashed lines.
  • the pivoting into the open position is also carried out here solely by the charge air pressure, which is symbolized by the arrow 12. 3, the charge air pressure may also be sufficient to initiate only the opening movement of the flap.
  • the remainder of the opening stroke is then carried out by the electromagnet or it at least acts as a support for the opening stroke up to the full opening position of the flap.
  • a lever 16 which is made of a ferromagnetic material and is anchored into the cavity of a magnet coil 14 'through the pipe section 9 when the valve is pivoted into the open position, is attached at a distance from the bearing point 11.
  • the magnet coil 14 is connected directly or via a thermal switch to the ignition circuit. If current is present on the magnetic coil 14 'and the opening movement of the air flap is initiated by the charge air pressure, the lever 16 plunges into the cavity of the magnetic coil, which pulls it into itself, the valve being pivoted into the open position indicated by the dashed lines.
  • the air flap 8 remains against the spring force acting on it for resetting into the closed position until the power supply to the magnetic coil is switched off and the magnetic field of the magnetic coil breaks down. 1 can be done by switching off the engine and interrupting the ignition circuit or by interrupting the circuit through the thermal switch 15, as has been described in connection with FIG. 1.
  • the lever 16 is curved in a circular arc here so that it can be passed through a simple hole in the pipe section 9. As shown below with reference to FIG. 6, the lever 16 can also engage outside the pipe section on a shaft 11 holding the air flap 8, one end 11 'of which is extended beyond its bearing point in the pipe section. According to
  • Fig. 4 is on the air flap 8 instead of the lever 16, a lever 17 with a projection 18, which assumes the position shown in dashed lines in Fig. 4 with the flap in its open position.
  • the lever 17 with its projection 18 projects through the pipe section 9 at a location provided for this purpose, as is shown schematically in FIG. 4.
  • an electromagnet 19 Outside the pipe section 9 there is an electromagnet 19, the armature 20 of which is provided with a hook-like projection 21.
  • the electromagnet 19 is connected to a voltage source, the armature 20 is attracted. If the air flap has already been pivoted into the open position by the charge air pressure, the hook-like projection 21 engages behind the projection or notch on the lever 17, as a result of which the air flap is held in the open position.
  • the air flap can then only pivot back into the closed position drawn in solid lines by the force of the spring acting on it when the current to the electromagnet 19 is interrupted and as a result its armature 20 is lowered, as a result of which the lever 17 is released again.
  • the electromagnet can be connected to the ignition circuit by a thermal switch 15.
  • the lever 17 can also be attached outside the tube section 8 to a shaft carrying the air flap, as will be described with reference to FIG. 7.
  • the lever with its projection can nevertheless snap or snap in behind the projection 21 on the armature.
  • resilient members not shown, which allow the lever to snap or snap behind the projection 21 of the armature in order to hold the air flap in the open position. Only when the current flow to the electromagnet is interrupted does the armature 20 drop and the air flap is released again in order to pivot back into the closed position.
  • the holding function for the air flap 8 is not performed by an electromagnet or a coil, but by a bistable body 22, which is arranged outside the pipe section and the end of which Reaches a locking position when a certain engine or exhaust gas temperature is reached. At a lower temperature, the bistable body 22 assumes a rest position that differs significantly from the locking position. 5, the bistable body 22 is drawn with solid lines in its rest position.
  • the bistable body assumes the position shown in broken lines in FIG. 5, in which it reaches behind the projection 18 in order to hold the air flap in its open position. It is clear that the bimetallic body can also be arranged within the tube section 9. It is then not necessary to guide the lever 17 with the projection 18 through a wall opening in the pipe section 9. On the other hand, the bimetallic body for locking the air flap in its open position can also engage behind a lever 17 on a shaft holding the air flap 8, as shown in FIG. 8.
  • FIGS. 6 to 10 show exemplary embodiments in which the air flap 8 is held on a shaft 10 which is mounted in the wall of the pipe section 9.
  • the shaft 11 is in each case extended at one end 11 ′ to engage a lever 17.
  • an electromagnet 14 according to FIG. 2 an electromagnet 19 according to FIG. 4 and a bimetallic body 22 according to FIG. 5 for holding the air flap 8 in its open position according to FIG. 5.
  • the conditions are chosen so that the When the air flap is open, shaft 11 is rotated into a position in which the levers can lie close to or next to the electromagnet or bimetallic body, so that the electromagnets hold the lever 16 only by magnetic attraction when connected to a voltage source (Fig. 6 ) or couple the armature 20 with the lever 17 (Fig. 7) or latch the bimetallic body 22 with the lever 17 at the selected engine temperature.
  • a piston rod 23 is pushed into the pivoting range of the lever, the piston 26 of which can be displaced in a cylinder 25 against the force of a spring 24 by the oil pressure of the engine.
  • the cylinder 25 is connected to the oil circuit of the engine via a line 27.
  • an electric servomotor 24 ′ acts on the shaft end 11 ′ of the air flap shaft 11, which outputs a torque to the shaft when the motor is switched on, on the basis of which the air flap is held in the open position.
  • the servomotor 24, like the electric motor 14, can be switched on in the ignition circuit of the vehicle.
  • the coupling between the shaft end 11 'and the servomotor is selected such that the air flap can be pivoted freely into the open position by the charge air pressure and is held in the open position only when the servomotor is switched on.
  • the servomotor can be connected to the circuit via the thermal switch 15.
  • the air flap for its pivotable mounting in the charge air line can also be held on a shaft led out of the charge air line, to which a mechanical spring acts to rotate the shaft into the closed position of the air flap and which for the opposite rotation of the shaft into the open position of the air flap is connected via a lever mechanism to at least one piston which is acted upon by the pressure of the air accumulated in the charge air line and / or by the vacuum.
  • the piston can be designed so that in its one end position, in which the air flap is open, it comes to lie against an electromagnet which is switched on in the ignition circuit and holds it in this position as long as the ignition circuit is closed. If the piston is made of plastic, it can be firmly connected to an iron plate, for example, on an end face facing the electromagnet / 11 be, which is held magnetically by the switched-on electromagnet in one end position of the piston.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Supercharger (AREA)
  • Means For Warming Up And Starting Carburetors (AREA)
EP80106522A 1979-11-09 1980-10-24 Dispositif de commande pour un papillon disposé dans la conduite d'air comprimé d'un moteur à combustion Expired EP0028745B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80106522T ATE5610T1 (de) 1979-11-09 1980-10-24 Stellgeraet fuer eine in der ladeluftleitung eines verbrennungsmotors angeordnete luftklappe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792945230 DE2945230A1 (de) 1979-11-09 1979-11-09 Stellgeraet fuer eine in der ladeluftleitung eines verbrennungsmotors angeordnete luftklappe
DE2945230 1979-11-09

Publications (2)

Publication Number Publication Date
EP0028745A1 true EP0028745A1 (fr) 1981-05-20
EP0028745B1 EP0028745B1 (fr) 1983-12-14

Family

ID=6085544

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80106522A Expired EP0028745B1 (fr) 1979-11-09 1980-10-24 Dispositif de commande pour un papillon disposé dans la conduite d'air comprimé d'un moteur à combustion

Country Status (5)

Country Link
US (1) US4474009A (fr)
EP (1) EP0028745B1 (fr)
JP (1) JPS5683539A (fr)
AT (1) ATE5610T1 (fr)
DE (2) DE2945230A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4838234A (en) * 1987-04-16 1989-06-13 Bbc Brown Boveri Ag Free-running pressure wave supercharger
EP0383441A1 (fr) * 1989-02-01 1990-08-22 Yanmar Diesel Engine Co. Limited Système de démarrage pour moteurs diesel

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60192842A (ja) * 1984-03-15 1985-10-01 Mazda Motor Corp 過給機付エンジン
JPS6127926U (ja) * 1984-07-24 1986-02-19 マツダ株式会社 過給機付エンジン
DE9113727U1 (de) * 1991-11-05 1992-01-02 Filterwerk Mann & Hummel Gmbh, 7140 Ludwigsburg Scharnier
DE10138997B4 (de) * 2001-08-15 2005-10-06 Audi Ag Verfahren und Vorrichtung für den Automatikstart eines Dieselmotors
US6752110B2 (en) * 2002-09-20 2004-06-22 Briggs & Stratton Corporation Electromechanical choke system for an internal combustion engine
US6830023B2 (en) * 2002-11-07 2004-12-14 Briggs & Stratton Corporation Electromagnetic choke system for an internal combustion engine
US7628387B1 (en) 2008-07-03 2009-12-08 Briggs And Stratton Corporation Engine air/fuel mixing apparatus
KR101606050B1 (ko) * 2014-10-17 2016-03-25 전정석 자동차 드로틀 밸브 구속조절 및 속도 제한장치

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2853987A (en) * 1957-09-19 1958-09-30 Ite Circuit Breaker Ltd Diesel engine supercharged by the aerodynamic wave machine
CH378595A (de) * 1960-08-30 1964-06-15 Bbc Brown Boveri & Cie Brennkraftmaschine mit einem als Aufladegerät wirkenden Druckaustauscher
CH399077A (de) * 1960-03-11 1966-03-31 Power Jets Research And Dev Li Kraftanlage, die eine Kolbenkraftmaschine und einen Druckaustauscher aufweist
DE2250355A1 (de) * 1971-10-21 1973-04-26 Gen Power Corp Integral turbo-kompressor
US3941151A (en) * 1974-10-07 1976-03-02 Biddle Joseph R Vent pipe check valve
US3958899A (en) * 1971-10-21 1976-05-25 General Power Corporation Staged expansion system as employed with an integral turbo-compressor wave engine
DE2557232A1 (de) * 1975-12-19 1977-06-23 Volkswagenwerk Ag Mit ladungsschichtung betriebene, fremdgezuendete brennkraftmaschine
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
DE2906997A1 (de) * 1979-02-22 1980-09-04 Bernard Thore Antriebseinrichtung mit aufladung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB895808A (en) * 1960-03-11 1962-05-09 Power Jets Res & Dev Ltd Improvements in or relating to supercharging reciprocating internal-combustion engines
JPS5020920B1 (fr) * 1970-12-11 1975-07-18
FR2271393A1 (fr) * 1974-02-01 1975-12-12 Alsacienne Constr Meca
DE2651473C3 (de) * 1976-11-11 1980-11-20 Mtu Bbc Aktiengesellschaft Brown Boveri & Cie., Baden (Schweiz) Brennkraftmaschine mit Aufladung durch eine gasdynamische Druckwellenmaschine

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2853987A (en) * 1957-09-19 1958-09-30 Ite Circuit Breaker Ltd Diesel engine supercharged by the aerodynamic wave machine
CH399077A (de) * 1960-03-11 1966-03-31 Power Jets Research And Dev Li Kraftanlage, die eine Kolbenkraftmaschine und einen Druckaustauscher aufweist
CH378595A (de) * 1960-08-30 1964-06-15 Bbc Brown Boveri & Cie Brennkraftmaschine mit einem als Aufladegerät wirkenden Druckaustauscher
DE2250355A1 (de) * 1971-10-21 1973-04-26 Gen Power Corp Integral turbo-kompressor
US3958899A (en) * 1971-10-21 1976-05-25 General Power Corporation Staged expansion system as employed with an integral turbo-compressor wave engine
US3941151A (en) * 1974-10-07 1976-03-02 Biddle Joseph R Vent pipe check valve
DE2557232A1 (de) * 1975-12-19 1977-06-23 Volkswagenwerk Ag Mit ladungsschichtung betriebene, fremdgezuendete brennkraftmaschine
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
DE2906997A1 (de) * 1979-02-22 1980-09-04 Bernard Thore Antriebseinrichtung mit aufladung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4838234A (en) * 1987-04-16 1989-06-13 Bbc Brown Boveri Ag Free-running pressure wave supercharger
EP0383441A1 (fr) * 1989-02-01 1990-08-22 Yanmar Diesel Engine Co. Limited Système de démarrage pour moteurs diesel

Also Published As

Publication number Publication date
JPS5683539A (en) 1981-07-08
DE2945230A1 (de) 1981-05-21
US4474009A (en) 1984-10-02
DE3065909D1 (en) 1984-01-19
EP0028745B1 (fr) 1983-12-14
ATE5610T1 (de) 1983-12-15

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