EP0411283A2 - Système de commande pour le carburateur d'une machine à combustion interne - Google Patents

Système de commande pour le carburateur d'une machine à combustion interne Download PDF

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Publication number
EP0411283A2
EP0411283A2 EP90110950A EP90110950A EP0411283A2 EP 0411283 A2 EP0411283 A2 EP 0411283A2 EP 90110950 A EP90110950 A EP 90110950A EP 90110950 A EP90110950 A EP 90110950A EP 0411283 A2 EP0411283 A2 EP 0411283A2
Authority
EP
European Patent Office
Prior art keywords
control system
pulse width
actuator
carburetor
modulation
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.)
Withdrawn
Application number
EP90110950A
Other languages
German (de)
English (en)
Other versions
EP0411283A3 (en
Inventor
Werner Erhard
Werner Flügel
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.)
Pruefrex Elektro Apparatebau GmbH
Original Assignee
Pruefrex Elektro Apparatebau GmbH
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 Pruefrex Elektro Apparatebau GmbH filed Critical Pruefrex Elektro Apparatebau GmbH
Publication of EP0411283A2 publication Critical patent/EP0411283A2/fr
Publication of EP0411283A3 publication Critical patent/EP0411283A3/de
Withdrawn legal-status Critical Current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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M1/00—Carburettors with means for facilitating engine's starting or its idling below operational temperatures
    • F02M1/08—Carburettors with means for facilitating engine's starting or its idling below operational temperatures the means to facilitate starting or idling becoming operative or inoperative automatically
    • F02M1/10—Carburettors with means for facilitating engine's starting or its idling below operational temperatures the means to facilitate starting or idling becoming operative or inoperative automatically dependent on engine temperature, e.g. having thermostat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/0015—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for using exhaust gas sensors
    • F02D35/0046—Controlling fuel supply
    • F02D35/0053—Controlling fuel supply by means of a carburettor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2409—Addressing techniques specially adapted therefor
    • F02D41/2412—One-parameter addressing technique

Definitions

  • the invention relates to a control system for the carburetor of an internal combustion engine, in particular for lawn mowers, chainsaws or cut-off machines, with a throttle valve arranged at the input of the carburetor intake pipe, which can be actuated automatically via an actuator.
  • Such pre-throttle valves are comparable to known starter flaps, which block the entry of the main air into the carburetor in order to produce a particularly rich mixture in the carburetor in the starting phase of a cold engine.
  • Such starter or pre-throttle valves can either be operated manually (with the "CHOKE”) or automatically (automatic start).
  • the internal combustion engine has an air / fuel mixture that is optimized for performance and pollutant emissions for each speed, which is determined in advance specifically for each machine and then with the corresponding characteristic fields organized data (tables) can be stored in programmable memory devices.
  • the pulse width modulator is coupled to these and outputs a pulse signal with a variable pulse duty factor, for example to an analog servomotor. This servomotor then forms the automatic actuation system for adjusting the pre-throttle valve in the carburetor.
  • the machine can be adjusted to the speed at which it achieves optimal performance with minimal pollutant emissions.
  • An increase in engine speed can be achieved by reducing the fuel supply and by electronic spark suppression and changing the ignition timing - cf. the older DE patent application P 38 17 471.5 - can be prevented.
  • the actuator is implemented as an analog servomotor, there is a particularly precise carburetor control for e.g. B. 9 000 rpm, the speed remains very constant and a high power yield is achieved.
  • the power supply of a separate magnetic generator is also used for the actuator of the pre-throttle valve, wherein it is simultaneously subjected to pulse width modulation.
  • a switching element is advantageously inserted into the supply line to the actuator, which is controlled by the pulse width modulator for opening and closing depending on the pulse width or degree of modulation.
  • the pulse width or the degree of modulation of the pulse width modulator is additionally influenced by an engine temperature sensor, a lambda probe and / or a knock sensor known to the person skilled in the art.
  • the pulse width modulator can recognize the operating state of the machine particularly precisely, query the programmable map accordingly and consequently adjust the throttle valve optimally via the actuator. It is within the scope of the invention to implement the pulse width modulator and / or the characteristic map coupled to it by means of a machine-specific / customer-specific integrated circuit or programmed microcomputer.
  • a pre-throttle valve 9 is arranged at its air flow inlet 6 with the flow direction 7 after the air filter 8. This can be adjusted by approximately 90 ° about a central axis running perpendicular to the plane of the drawing, whereby a specific mixture enrichment can be brought about in a manner known per se.
  • the pivoting of the pre-throttle valve 9 is effected by an actuator 10, as by the operative connection line 11 indicated schematically.
  • the actuator can e.g. B. be designed as an electronic stepper motor or linear servomotor.
  • Whose control input 12 is via a switching element 13, for. B. transistor or thyristor, connected to a DC supply 14, the z. B. can be fed with a rectifier coupled to the (not shown) internal combustion engine DC or AC voltage generator.
  • the switching element is controlled for opening and closing by a control module 15 via its output 16.
  • the control module 15 contains, as a functional unit, a pulse width modulator (PWM) 17 which, depending on the degree of modulation or duty cycle m, opens or closes the switching element 13 for a specific period of time t. This time period is dependent on the degree of modulation m determined by the pulse width modulator, so that a pulse train 18 of the type shown with variable pulse width or duration t results for the control input 12 of the actuator (STA) 10.
  • PWM pulse width modulator
  • the pulse width modulator 17 controls a memory module 19 integrated in the control module 15, which contains characteristic maps dependent on the speed n. These are determined beforehand in a motor-specific manner, so that the memory module 19 can expediently be implemented as an electrically programmable read-only memory.
  • control module 15 requires the speed n as an input parameter, which, as shown - derived from a rotating toothed segment wheel 20, a rotating magnetic pole wheel or the like - is fed directly to the memory module 19 with the speed-dependent characteristic maps can. Because of this, the pulse width modulator 17 can read out specific modulation degrees or duty cycles m (n) for each speed n from the memory module 19 and accordingly close or open the switching element 13 with a specific time period t (m).
  • Engine temperature sensors 21, knock sensors 22 and lambda ( ⁇ ) probes 23, the latter coupled to the intake pipe 24 of the carburetor, can also be provided.
  • Their measuring outputs 21a, 22a, 23a can either influence the function of the pulse width modulator or - as indicated in dashed lines in the drawing - the characteristic value output behavior of the memory module 19 to the pulse width modulator 17.
  • the control module can advantageously be implemented either as a customer-specific circuit or as a microcomputer with a motor-specific program.
  • a microcomputer that already controls the ignition of the engine can also be used for the present control system.
  • underutilized computing capacity is used cost-effectively. This idea can be expanded to the extent that the functions of the ignition and carburetor controls are combined under one comprehensive engine management system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
EP19900110950 1989-07-22 1990-06-09 Control system for the carburettor of an internal combustion engine Withdrawn EP0411283A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3924353 1989-07-22
DE3924353A DE3924353A1 (de) 1989-07-22 1989-07-22 Steuerungssystem fuer den vergaser einer brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP0411283A2 true EP0411283A2 (fr) 1991-02-06
EP0411283A3 EP0411283A3 (en) 1991-05-08

Family

ID=6385657

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900110950 Withdrawn EP0411283A3 (en) 1989-07-22 1990-06-09 Control system for the carburettor of an internal combustion engine

Country Status (3)

Country Link
US (1) US5031593A (fr)
EP (1) EP0411283A3 (fr)
DE (1) DE3924353A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0514556A1 (fr) * 1990-12-11 1992-11-25 Nikken Chemical Laboratory Co, Ltd. Additif pour solution humectante pour plaque lithographique, et solution humectante controlee
EP1835154A1 (fr) * 2006-03-16 2007-09-19 Dell'orto S.P.A. Contrôle électronique, système pour moteurs à carburateur, à allumage commandé, et à combustion interne
EP2492485A1 (fr) * 2009-10-22 2012-08-29 Mitsubishi Heavy Industries, Ltd. Dispositif de régulation du rapport air-carburant pour carburateur
WO2012119807A1 (fr) * 2011-03-09 2012-09-13 Makita Corporation Outil de travail motorisé doté d'un moteur à combustion interne
EP1574700A3 (fr) * 2004-03-12 2012-10-10 Honda Motor Co., Ltd. Dispositif de starter automatique
EP1577532A3 (fr) * 2004-03-18 2013-07-03 Honda Motor Co., Ltd. Dispositif de starter automatique

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2672086B1 (fr) * 1991-01-29 1995-02-03 Siements Automotive Sa Procede et dispositif de commande en boucle fermee de la puissance d'un moteur a combustion interne propulsant un vehicule automobile.
DE4310859C2 (de) * 1993-04-02 2002-11-28 Bosch Gmbh Robert Verfahren und Vorrichtung zur Positionierung einer Drosselklappe eines Kraftfahrzeuges
US6343596B1 (en) 1997-10-22 2002-02-05 Pc/Rc Products, Llc Fuel delivery regulator
US6390061B1 (en) * 1999-04-07 2002-05-21 Pemstar, Inc. Magnetic linear actuator for controlling engine speed
US6196205B1 (en) 1999-07-12 2001-03-06 Dana Corporation Fuel control system for gas-operated engines
US6593670B2 (en) * 2000-12-22 2003-07-15 William J. Anderson Automatic transfer switch and engine control
US7198028B2 (en) * 2001-07-18 2007-04-03 Walbro Engine Management, L.L.C. Ignition timing control system for light duty combustion engines
US20030015175A1 (en) * 2001-07-18 2003-01-23 Andersson Martin N. Ignition timing control system for light duty combustion engines
DE10335345B4 (de) * 2003-08-01 2013-04-18 Andreas Stihl Ag & Co. Kg Verfahren zum Betrieb einer Vergaseranordnung für einen Verbrennungsmotor und Vergaseranordnung zu dessen Durchführung
WO2005026519A2 (fr) * 2003-09-10 2005-03-24 Pcrc Products Systeme de regulation de carburant electronique destine a de petits moteurs
EP1671027A4 (fr) * 2003-09-10 2014-12-10 Pcrc Products Dispositif et procede permettant de commander les operations d'un moteur a combustion interne equipe d'un systeme d'injection electronique
US7284522B2 (en) * 2004-03-12 2007-10-23 Honda Motor Co., Ltd. Automatic choke
US7509941B2 (en) * 2006-03-08 2009-03-31 Phelon Euro Ab Apparatus and method for adjusting air-to-fuel ratio for small gasoline engine
US20080181997A1 (en) * 2007-01-25 2008-07-31 Mp Equipment Co., Inc. Food product molding machine which does not use hydraulics
JP2008255881A (ja) * 2007-04-04 2008-10-23 Kyoto Denkiki Kk エンジン
JP4868523B2 (ja) * 2007-04-04 2012-02-01 京都電機器株式会社 エンジンにおけるオートチョーク装置
US8146558B2 (en) * 2007-08-13 2012-04-03 Briggs & Stratton Corporation Automatic choke for an engine
US8219305B2 (en) 2008-05-27 2012-07-10 Briggs & Stratton Corporation Engine with an automatic choke and method of operating an automatic choke for an engine
US20140165961A1 (en) * 2012-12-19 2014-06-19 Dipak Patel Active plural inlet air induction system
WO2015023885A2 (fr) 2013-08-15 2015-02-19 Kohler Co. Systèmes et procédés permettant de réguler électroniquement le rapport carburant-air pour un moteur à combustion interne
US10054081B2 (en) 2014-10-17 2018-08-21 Kohler Co. Automatic starting system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3028629A1 (de) * 1980-07-29 1982-02-11 Audi Nsu Auto Union Ag, 7107 Neckarsulm Vergaser fuer brennkraftmaschinen, insbesondere in kraftfahrzeugen
EP0147612A2 (fr) * 1983-12-22 1985-07-10 Robert Bosch Gmbh Dispositif de réglage de la vitesse de ralenti d'un moteur à combustion
GB2171227A (en) * 1985-02-16 1986-08-20 Honda Motor Co Ltd Air-fuel ratio control
EP0223430A2 (fr) * 1985-10-21 1987-05-27 Honda Giken Kogyo Kabushiki Kaisha Méthode pour commander l'alimentation en courant du solénoide de la soupape électromagnétique qui commande l'alimentation en air d'un moteur à combustion interne
DE3835731A1 (de) * 1987-10-23 1989-05-03 Tillotson Ltd Vergaser und verbrennungsmotor mit einem vergaser

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US3807371A (en) * 1970-09-30 1974-04-30 Borg Warner Charge forming method and apparatus with overspeed governor
US4125095A (en) * 1975-06-25 1978-11-14 Wilson Jack C Carburetors for internal combustion engines
JPS55160135A (en) * 1979-05-29 1980-12-12 Nissan Motor Co Ltd Suction air controller
JPS58158345A (ja) * 1982-03-15 1983-09-20 Nippon Denso Co Ltd エンジン制御方法
US4463723A (en) * 1982-04-01 1984-08-07 Acf Industries, Incorporated Apparatus for controllably opening a carburetor choke valve
US4462357A (en) * 1982-08-30 1984-07-31 General Motors Corporation Throttle system
IT1157490B (it) * 1982-12-20 1987-02-11 Weber Spa Carburatore per motori a combustione interna provvisto di organi ad azione elettronica atti a mantenere costante il minimo regime del motore ed a controllare la posizione della farfalla di avviamento durante la messa in efficienza del motore
DE3434339A1 (de) * 1984-09-19 1986-03-27 Robert Bosch Gmbh, 7000 Stuttgart Elektronische einrichtung zum erzeugen eines kraftstoffzumesssignals fuer eine brennkraftmaschine
DE3434644A1 (de) * 1984-09-21 1986-04-03 Vdo Adolf Schindling Ag, 6000 Frankfurt Verfahren und einrichtung zur erzeugung einer getakteten stellspannung
JPS6183467A (ja) * 1984-09-29 1986-04-28 Mazda Motor Corp エンジンの制御装置
JPS61279743A (ja) * 1985-06-04 1986-12-10 Nissan Motor Co Ltd 車両用アクセル制御装置
DE3610717A1 (de) * 1986-03-29 1987-10-01 Bosch Gmbh Robert Verfahren und digitales steuergeraet zur bestimmung und steuerung von pulsbreitenmodulierten betriebsgroessen bei einer brennkraftmaschine
DE3627471C1 (de) * 1986-08-13 1991-07-04 Pierburg Gmbh Brenngemischbildungseinrichtung
FR2603948B1 (fr) * 1986-09-17 1991-01-11 Solex Assistance electrique sur volet
US4831985A (en) * 1988-02-17 1989-05-23 Mabee Brian D Throttle control system
US4884541A (en) * 1989-01-12 1989-12-05 Tecumseh Products Company Speed governor for small engines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3028629A1 (de) * 1980-07-29 1982-02-11 Audi Nsu Auto Union Ag, 7107 Neckarsulm Vergaser fuer brennkraftmaschinen, insbesondere in kraftfahrzeugen
EP0147612A2 (fr) * 1983-12-22 1985-07-10 Robert Bosch Gmbh Dispositif de réglage de la vitesse de ralenti d'un moteur à combustion
GB2171227A (en) * 1985-02-16 1986-08-20 Honda Motor Co Ltd Air-fuel ratio control
EP0223430A2 (fr) * 1985-10-21 1987-05-27 Honda Giken Kogyo Kabushiki Kaisha Méthode pour commander l'alimentation en courant du solénoide de la soupape électromagnétique qui commande l'alimentation en air d'un moteur à combustion interne
DE3835731A1 (de) * 1987-10-23 1989-05-03 Tillotson Ltd Vergaser und verbrennungsmotor mit einem vergaser

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0514556A1 (fr) * 1990-12-11 1992-11-25 Nikken Chemical Laboratory Co, Ltd. Additif pour solution humectante pour plaque lithographique, et solution humectante controlee
EP0514556A4 (en) * 1990-12-11 1993-02-24 Nikken Chemical Laboratory Co, Ltd. Additive for dampening solution for lithographic plate and stock dampening solution
EP1574700A3 (fr) * 2004-03-12 2012-10-10 Honda Motor Co., Ltd. Dispositif de starter automatique
EP1577532A3 (fr) * 2004-03-18 2013-07-03 Honda Motor Co., Ltd. Dispositif de starter automatique
EP1835154A1 (fr) * 2006-03-16 2007-09-19 Dell'orto S.P.A. Contrôle électronique, système pour moteurs à carburateur, à allumage commandé, et à combustion interne
EP2492485A1 (fr) * 2009-10-22 2012-08-29 Mitsubishi Heavy Industries, Ltd. Dispositif de régulation du rapport air-carburant pour carburateur
EP2492485A4 (fr) * 2009-10-22 2013-10-02 Mitsubishi Heavy Ind Ltd Dispositif de régulation du rapport air-carburant pour carburateur
US8733322B2 (en) 2009-10-22 2014-05-27 Mitsubishi Heavy Industries, Ltd. Air-fuel ratio control device for a carburetor
WO2012119807A1 (fr) * 2011-03-09 2012-09-13 Makita Corporation Outil de travail motorisé doté d'un moteur à combustion interne

Also Published As

Publication number Publication date
US5031593A (en) 1991-07-16
EP0411283A3 (en) 1991-05-08
DE3924353A1 (de) 1991-02-14

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