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EP0147740A2 - Dispositif pour augmenter le vide - Google Patents

Dispositif pour augmenter le vide Download PDF

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Publication number
EP0147740A2
EP0147740A2 EP84115394A EP84115394A EP0147740A2 EP 0147740 A2 EP0147740 A2 EP 0147740A2 EP 84115394 A EP84115394 A EP 84115394A EP 84115394 A EP84115394 A EP 84115394A EP 0147740 A2 EP0147740 A2 EP 0147740A2
Authority
EP
European Patent Office
Prior art keywords
vacuum
engine
actuator
idling
throttle valve
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
EP84115394A
Other languages
German (de)
English (en)
Other versions
EP0147740A3 (fr
Inventor
Ettore Cordiano
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.)
Corint SRL
Original Assignee
Corint SRL
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 Corint SRL filed Critical Corint SRL
Publication of EP0147740A2 publication Critical patent/EP0147740A2/fr
Publication of EP0147740A3 publication Critical patent/EP0147740A3/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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M7/00—Carburettors with means for influencing, e.g. enriching or keeping constant, fuel/air ratio of charge under varying conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M3/00—Idling devices for carburettors
    • F02M3/06—Increasing idling speed
    • F02M3/062—Increasing idling speed by altering as a function of motor r.p.m. the throttle valve stop or the fuel conduit cross-section by means of pneumatic or hydraulic means
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
    • F02D2009/0201—Arrangements; Control features; Details thereof
    • F02D2009/024—Increasing intake vacuum

Definitions

  • the present invention relates to a device for rapidly boosting the vacuum produced at idling by an engine for motor vehicles provided with vacuum-operated load systems, the vacuum being provided by the induction of the engine in the case of a petrol engine, or by a suitable vacuum pump in the case of a diesel engine, of the type comprising a vacuum actuator acting upon a throttle valve in the induction duct system of the engine and, in the case of a petrol engine, comprising the throttle valve of the carburettor or of the injection system.
  • the vacuum is generally created in the induction manifold of the engine; a non-return valve is positioned in a connecting duct between the induction manifold and a load system in such a way that, at full engine power, when the manifold vacuum is noticeably weakened, or when the engine is stopped, the vacuum is maintained in the load system.
  • a volumetric vacuum pump is provided to generate the vacuum necessary for the load systems, various types of such pump being known in the prior art.
  • This pump is driven by the engine and therefore functions continuously,drawing air from the load system with a flow rate which is susbtantially proportional to the number of revolutions (r.p.m.) of the engine.
  • the flow rate of air evacuated from the load system is insufficient.
  • the flow rate of air evacuated by the engine may be too low to maintain a sufficient vacuum in the power steering circuit, and the servo-assisted effect becomes inadequate.
  • the vacuum pump gives a flow rate which is too low for a sufficient vacuum to be formed in the circuit of a power steering system.
  • the power available in a servo-braking system may become critically low if the brake is applied repeatedly at short intervals with the engine idling.
  • the petrol engine does not present this problem in a servo-braking system because the air flow rate which it provides, for a given swept volume, is much greater than that of a vacuum pump of a diesel engine.
  • a vacuum pump of a diesel engine so as to resolve the problems described it would be necessary to use a vacuum pump of a size and flow rate that are significantly greater than those normally employed, with obvious penalties with regard to costs, weight and power dissipation.
  • the object of the present invention is that of resolving the problems described above without incurring the consequent penalties aforementioned.
  • a vacuum-boosting device of the type referred to, characterised in that the vacuum actuator is actuated by the vacuum existing in the pneumatic circuit of the load system and controls the throttle valve in such a way that, when said vacuum is.weaker than a given predetermined value, the actuator, in the case of a petrol engine, opens the throttle valve slightly for the purpose of slightly increasing the engine idling revolutions, or in the case of a diesel engine, the actuator ensures that the valve throttles the air flow in the supply system in order to create in the said supply system a vacuum that assists the vacuum pump to exhaust air from the load system , the actuator returning the engine, be this a petrol engine or a diesel engine, to its normal operating condition once the vacuum in the load system has reached the said predetermined value.
  • the device of the invention allows the times of evacuation of a load system to be significantly reduced, with negligible increase in cost compared with the cost of the load system itself.
  • reference numeral 2 indicates a lever for controlling the carburettor throttle of a petrol engine, fixed to a spindle 1 on which the said throttle, not shown, is mounted.
  • the lever 2 is provided with a tab 3 having a threaded hole in which is engaged an idling adjustment screw 4, locked by a safety lock nut 5.
  • a vacuum actuator capsule 16 is mounted by means of a bracket llb.
  • the actuator capsule 16 comprises two half-casings 10 and 11, and a piston formed by two caps 7 and 8, a diaphragm 9 sandwiched between the caps and a small rod 6 attached to the caps 7 and 8.
  • a preloaded helical spring 12 bears against the cap 7, urging the piston to the left as viewed in Figure 1.
  • the half-casing 10 is equipped with a connector spigot 10b on which a pipe 14 is fitted.
  • the pipe 14 connects a chamber 10a defined between the piston 7,8 and the half-casing 10 to a load circuit, for example a servo-braking system identified 15 in the drawings.
  • the carburettor/accelerator control system is provided with a resilient biassing system, not shown in the drawings, which tends to bias the throttle to an idling position and, therefore, to bias the lever 2 to the position indicated by a continuous line in Figure 1. Under such conditions the idling adjustment screw 4, which abuts the small rod 6, is adjusted so as to ensure the desired normal idling engine revolutions.
  • the spring 12 exerts a load greater than the thrust exerted by the screw 4 against the rod 6, and consequently, in the absence of any vacuum in the chamber 10a the spring 12 displaces the piston and the rod 6 fully towards the left and the lever 2 into the position indicated by a dotted line. Under these conditions, the engine is slightly accelerated to a "high idling" condition at a higher number of revolutions per minute, (r.p.m.) than "normal idling" r.p.m.
  • the difference in r.p.m. between the high idling and normal idling depends on the throttle opening imposed by the rod 6.
  • the vacuum in the load circuit and in the chamber 10a strengthens and exceeds the value at which the thrust on the piston of the actuator capsule 16 resulting from the vacuum is greater than the difference between the load of the spring 12 and the thrust of the adjusting screw 4 against the rod 6, the piston, together with the lever 2, is displaced towards the right and normal idling is resumed.
  • the spring 12 returns the lever 2 to the high idling position.
  • the vacuum level at which the device intervenes is easily controlled by regulating the load of the spring 12 and the dimensions of the piston capsule 16.
  • a restricted air passage may be provided in the half-casing 11, for example by means of a small hole lla of suitable 3iameter.
  • FIG 2 shows a device for choking the air flow into the induction manifold of a diesel engine.
  • the device is mounted on an air filter 17 upstream of the induction manifold.
  • a butterfly throttle valve 19 carried upon a shaft 20 rotatably supported by two bushes 21, 21a, fixed to the walls of the pipe 18, as shown in Figure 3.
  • a lever 22 On one end of the shaft 20 there is fixed a lever 22 which is connected by means of a rod 23 to a piston 24 of a vacuum actuator capsule 25.
  • the capsule 25 is made up of two half-casings 26 and 27 and a diaphragm 30 sandwiched between two caps 28, 29 which together constitute the piston 24.
  • a spring 31 which biases the piston 24, downwardly as viewed, tending to rotate the throttle valve 19 towards the "high idling" position indicated in Figure 2 by a dotted line.
  • the capsule 25 is fixed to the pipe 18 by means of a bracket 32.
  • FIG 2 the pneumatic connections of the system are shown diagrammatically.
  • the load system 15 is connected to a vacuum pump 34 driven by the engine and to the said air filter 17, downstream of the throttle valve 19.
  • a non-return valve 33 which prevents the pump 34 from drawing air from the filter 17.
  • the engine is constrained to draw air from the load system 15, and does so at a very high flow rate.
  • the vacuum in the load system 15 then strengthens rapidly until it reaches the preset value of the capsule 25 when the latter re-opens the throttle valve 19, restoring the normal conditions of supply of the engine.
  • the device may obviously be inserted in the inlet of the induction manifold or at any other point where the flow of air into the manifold is restricted.

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)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
EP84115394A 1983-12-23 1984-12-13 Dispositif pour augmenter le vide Ceased EP0147740A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT6835083 1983-12-23
IT68350/83A IT1160242B (it) 1983-12-23 1983-12-23 Dispositivo per aumentare la depressione con motore al minimo su autoveicoli dotati di impianti utilizzatori funzionanti a depressione

Publications (2)

Publication Number Publication Date
EP0147740A2 true EP0147740A2 (fr) 1985-07-10
EP0147740A3 EP0147740A3 (fr) 1985-11-27

Family

ID=11309083

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84115394A Ceased EP0147740A3 (fr) 1983-12-23 1984-12-13 Dispositif pour augmenter le vide

Country Status (6)

Country Link
EP (1) EP0147740A3 (fr)
JP (1) JPS60169635A (fr)
KR (1) KR850004300A (fr)
BR (1) BR8406824A (fr)
ES (1) ES538922A0 (fr)
IT (1) IT1160242B (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992009800A1 (fr) * 1990-11-28 1992-06-11 Allan Morrison Energie tiree de l'admission d'air d'un moteur a combustion interne
GB2255801A (en) * 1991-05-13 1992-11-18 Martyn Trevor Mercer Diesel engine air intake control.
EP0744545A3 (fr) * 1995-05-23 1997-11-19 Toyota Jidosha Kabushiki Kaisha Dispositifs de commande pour moteur à combustion pour diminuer la pression d'air pendant le démarrage
EP0829629A1 (fr) * 1996-09-17 1998-03-18 Toyota Jidosha Kabushiki Kaisha Dispositif pour commander l'injection de carburant pour un moteur avec charge stratifiée
EP0816196A3 (fr) * 1996-06-28 1998-09-02 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Régulation de pression pour un amplificateur de freinage dans un moteur à combustion interne à combustion pauvre
WO2005111396A1 (fr) * 2004-05-17 2005-11-24 Ibadullaev Gadgikadir Aliyarov Moteur a combustion interne a essence avec un degre de compression jusqu'a 45
WO2005111398A1 (fr) * 2004-05-17 2005-11-24 Ibadullaev Gadgikadir Aliyarov Moteur diesel a combustion interne
WO2005111397A1 (fr) * 2004-05-17 2005-11-24 Ibadullaev Gadgikadir Aliyarov Procede de demarrage et de fonctionnement d'un moteur a combustion interne a essence avec un degre de compression jusqu'a 45
WO2005111399A1 (fr) * 2004-05-17 2005-11-24 Ibadullaev, Gadgikadir Aliyarovich Procede de demarrage et de fonctionnement d'un moteur diesel a combustion interne
WO2011139725A3 (fr) * 2010-05-03 2012-01-26 Honeywell International Inc. Ensemble de commande d'écoulement équipé d'un détendeur de fluide rotatif
US8446029B2 (en) 2010-04-05 2013-05-21 Honeywell International Inc. Turbomachinery device for both compression and expansion
US9115644B2 (en) 2009-07-02 2015-08-25 Honeywell International Inc. Turbocharger system including variable flow expander assist for air-throttled engines
US9567962B2 (en) 2011-05-05 2017-02-14 Honeywell International Inc. Flow-control assembly comprising a turbine-generator cartridge
US20190153933A1 (en) * 2017-11-22 2019-05-23 Speedwerx, Inc. Combustion exhaust valve
US10358987B2 (en) 2012-04-23 2019-07-23 Garrett Transportation I Inc. Butterfly bypass valve, and throttle loss recovery system incorporating same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2083133A (en) * 1980-09-01 1982-03-17 Hitachi Ltd Regulating the intake of air or mixture to i.c. engines
US4376427A (en) * 1980-11-20 1983-03-15 Toyota Jidosha Kogyo Kabushiki Kaisha Engine air/fuel ratio control system with both normal idling and idle up idling capability
US4391245A (en) * 1981-10-19 1983-07-05 Colt Industries Operating Corp. Pressure operated three-position throttle stop assembly
US4401078A (en) * 1981-06-12 1983-08-30 Nippon Soken Inc. Intake throttling device for diesel engines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2083133A (en) * 1980-09-01 1982-03-17 Hitachi Ltd Regulating the intake of air or mixture to i.c. engines
US4376427A (en) * 1980-11-20 1983-03-15 Toyota Jidosha Kogyo Kabushiki Kaisha Engine air/fuel ratio control system with both normal idling and idle up idling capability
US4401078A (en) * 1981-06-12 1983-08-30 Nippon Soken Inc. Intake throttling device for diesel engines
US4391245A (en) * 1981-10-19 1983-07-05 Colt Industries Operating Corp. Pressure operated three-position throttle stop assembly

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992009800A1 (fr) * 1990-11-28 1992-06-11 Allan Morrison Energie tiree de l'admission d'air d'un moteur a combustion interne
GB2255801A (en) * 1991-05-13 1992-11-18 Martyn Trevor Mercer Diesel engine air intake control.
EP0744545A3 (fr) * 1995-05-23 1997-11-19 Toyota Jidosha Kabushiki Kaisha Dispositifs de commande pour moteur à combustion pour diminuer la pression d'air pendant le démarrage
EP0816196A3 (fr) * 1996-06-28 1998-09-02 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Régulation de pression pour un amplificateur de freinage dans un moteur à combustion interne à combustion pauvre
EP0829629A1 (fr) * 1996-09-17 1998-03-18 Toyota Jidosha Kabushiki Kaisha Dispositif pour commander l'injection de carburant pour un moteur avec charge stratifiée
US5950594A (en) * 1996-09-17 1999-09-14 Toyota Jidosha Kabushiki Kaisha Apparatus for controlling fuel injection in stratified charge combustion engine
WO2005111397A1 (fr) * 2004-05-17 2005-11-24 Ibadullaev Gadgikadir Aliyarov Procede de demarrage et de fonctionnement d'un moteur a combustion interne a essence avec un degre de compression jusqu'a 45
WO2005111398A1 (fr) * 2004-05-17 2005-11-24 Ibadullaev Gadgikadir Aliyarov Moteur diesel a combustion interne
WO2005111396A1 (fr) * 2004-05-17 2005-11-24 Ibadullaev Gadgikadir Aliyarov Moteur a combustion interne a essence avec un degre de compression jusqu'a 45
WO2005111399A1 (fr) * 2004-05-17 2005-11-24 Ibadullaev, Gadgikadir Aliyarovich Procede de demarrage et de fonctionnement d'un moteur diesel a combustion interne
US9115644B2 (en) 2009-07-02 2015-08-25 Honeywell International Inc. Turbocharger system including variable flow expander assist for air-throttled engines
US8446029B2 (en) 2010-04-05 2013-05-21 Honeywell International Inc. Turbomachinery device for both compression and expansion
WO2011139725A3 (fr) * 2010-05-03 2012-01-26 Honeywell International Inc. Ensemble de commande d'écoulement équipé d'un détendeur de fluide rotatif
US8544262B2 (en) 2010-05-03 2013-10-01 Honeywell International, Inc. Flow-control assembly with a rotating fluid expander
US9567962B2 (en) 2011-05-05 2017-02-14 Honeywell International Inc. Flow-control assembly comprising a turbine-generator cartridge
US10358987B2 (en) 2012-04-23 2019-07-23 Garrett Transportation I Inc. Butterfly bypass valve, and throttle loss recovery system incorporating same
US20190153933A1 (en) * 2017-11-22 2019-05-23 Speedwerx, Inc. Combustion exhaust valve
US10883417B2 (en) * 2017-11-22 2021-01-05 Speedwerx, Inc. Combustion exhaust valve

Also Published As

Publication number Publication date
ES8601395A1 (es) 1985-11-01
EP0147740A3 (fr) 1985-11-27
JPS60169635A (ja) 1985-09-03
BR8406824A (pt) 1985-10-29
IT8368350A0 (it) 1983-12-23
ES538922A0 (es) 1985-11-01
IT1160242B (it) 1987-03-04
KR850004300A (ko) 1985-07-11

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Effective date: 19880408

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Inventor name: CORDIANO, ETTORE