EP2955354B1 - Procédé de commande de la limitation de régime d'un moteur à combustion - Google Patents

Procédé de commande de la limitation de régime d'un moteur à combustion Download PDF

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Publication number
EP2955354B1
EP2955354B1 EP15001954.5A EP15001954A EP2955354B1 EP 2955354 B1 EP2955354 B1 EP 2955354B1 EP 15001954 A EP15001954 A EP 15001954A EP 2955354 B1 EP2955354 B1 EP 2955354B1
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EP
European Patent Office
Prior art keywords
speed
combustion engine
internal combustion
engine
signal
Prior art date
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Active
Application number
EP15001954.5A
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German (de)
English (en)
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EP2955354A1 (fr
Inventor
Fabian Gwosdz
Claus Naegele
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.)
Andreas Stihl AG and Co KG
Original Assignee
Andreas Stihl AG and Co KG
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Application filed by Andreas Stihl AG and Co KG filed Critical Andreas Stihl AG and Co KG
Publication of EP2955354A1 publication Critical patent/EP2955354A1/fr
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Publication of EP2955354B1 publication Critical patent/EP2955354B1/fr
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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
    • F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
    • F02D31/001—Electric control of rotation speed
    • F02D31/007—Electric control of rotation speed controlling fuel supply
    • F02D31/009—Electric control of rotation speed controlling fuel supply for maximum speed control
    • 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
    • F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
    • F02B63/02—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for hand-held tools

Definitions

  • the invention relates to a method for controlling the speed limitation of an internal combustion engine in a hand-held implement according to the preamble of claim 1.
  • Portable, hand-held implements such as motorized chain saws, power cutters, hedge trimmers, brush cutters, blowers or the like are usually driven by an internal combustion engine, which must be taken on site via a starting device in operation.
  • the z. B. may be a recoil starter, the engine is placed in a start mode, d. h., the fuel supply and the combustion air supply adjusted accordingly. This can be z. B. done by the adjustment of a choke or throttle in the intake.
  • the clutch usually a centrifugal clutch, engages above an engagement speed and separates the work tool from the drive below the engagement speed.
  • a speed lock circuit is provided which keeps the instantaneous speed of the engine electronically below the engagement speed, preferably below a limit speed of the speed lock circuit forces.
  • the speed control device When the speed lock circuit is activated, the speed control device will permanently try by regulating interventions to keep the speed below the predetermined limit speed of the speed lock circuit. Therefore, after the startup phase has elapsed, the speed lock circuit must be turned off so that the user can use the entire engine speed band for work.
  • the invention has for its object to provide a method which causes without additional sensors with little technical effort to turn off a speed lock circuit.
  • the object is achieved in that a deactivation signal for switching off the speed lock circuit is generated and applied only when an operating change signal of the internal combustion engine is detected, so the operating state of the engine is changed.
  • the operation change signal is derived from the frequency of the control actions of the speed control means for maintaining the limit speed of the speed lock circuit.
  • the speed control circuit will have a control activity when the instantaneous speed approaches the limit speed. H. Make a higher number of control actions into the ignition than when the instantaneous speed is significantly below the limit speed. If the instantaneous speed exceeds the limit speed, the control activity, i. H. the number of control interventions are extremely high.
  • an operation change signal may be derived to generate and apply the deactivation signal for the speed lock circuit.
  • the number of control interventions is monitored over time; If the number of control interventions per unit of time exceeds a predetermined value, this is an indicator that the user has given full throttle and requires the entire speed range. Thus, if the predetermined value of the control interventions per unit time is exceeded, the system outputs an operating change signal, which leads to the shutdown of the speed lock circuit.
  • the deactivation signal is generated only when a predeterminable time has elapsed after the start of the internal combustion engine. This will ensure that the internal combustion engine has reached a stable operating condition before the entire speed band is released.
  • a hand-held implement 1 is shown using the example of a motor chain saw.
  • This portable, hand-held implement 1 is exemplary of other portable, hand-held implements such.
  • cutters As cutters, hedge trimmers, brushcutter, pruners, blowers or the like.
  • the illustrated implement 1 has a housing 31, which essentially serves to receive an internal combustion engine 8.
  • the engine 8 is a one-cylinder two-stroke engine; training as a one-cylinder four-stroke engine may be appropriate.
  • the implement 1 has a arranged in the longitudinal direction of the housing 31 rear handle 2 and a front, bow-shaped handle 3, which extends transversely to the longitudinal direction of the housing 31 via the top thereof.
  • the front handle 3, a hand guard 32 is assigned as a trigger of a safety brake device not shown in the illustrated embodiment, a motor chain saw.
  • a guide rail 34 is fixed on the side opposite the handle 2, in the circumferential groove of a saw chain 35 out is.
  • the saw chain 35 is driven by a not shown drive pinion and a clutch 33 from a crankshaft 13 of the engine 8.
  • the crankshaft 13 is connected via a connecting rod 11 with a piston 10 in connection, which limits a combustion chamber 22 in the cylinder 9 of the internal combustion engine 8.
  • the necessary for the operation of the engine fuel / air mixture is sucked through an intake passage 38 into the crankcase 12 of the engine 8 and ignited in the combustion chamber 22 via a spark plug 23.
  • the fuel / air mixture is provided by a fuel system 40 which is received in an air filter box 4 of the housing 31 and fed from a fuel tank 41.
  • a throttle lever 5 for controlling the rotational speed of the engine 8 is provided on the inside; on the gas lever 5 opposite longitudinal side of the handle 2, a throttle lever lock 7 is arranged.
  • the throttle lever 5 can be operated only when the throttle lock 7 is depressed.
  • a mode selector 39 is provided which can assume operating positions such as “stop”, “operation”, “start” or the like.
  • the engine is switched to the respective corresponding operating state.
  • the internal combustion engine is started by a recoil starter 6, which - in a known manner - engages one end of the crankshaft 13 and rotates it to start the internal combustion engine 8.
  • Fig. 2 an internal combustion engine is shown in the basic structure of the engine 8 in the hand-held implement after Fig. 1 equivalent.
  • a fuel valve 17 is provided which opens into an overflow channel 20 of the two-stroke engine.
  • the volume of the crankcase 12 is connected via two symmetrically arranged overflow channels 20 and 21 with the combustion chamber 22.
  • the combustion air sucked into the crankcase 12 via an inlet 16 is conveyed into the combustion chamber 22 and, together with the fuel introduced into the overflow channel 20, is conveyed into the combustion chamber 22.
  • the mixture is ignited by the spark plug 23, wherein during the downward stroke of the piston 10, the outlet 19 opens and the combustion gases via a silencer 36 (FIGS. Fig. 1 ) dissipates.
  • the spark plug 23 is connected to an ignition device 30, which triggers a spark on the spark plug 23 as a function of the signals of an ignition module 24 and other variables.
  • the ignition module 24 cooperates with a rotating fan wheel 15, which is fastened on one end of the crankshaft 13 and correspondingly has circulating magnets for induction of the ignition energy in the ignition module 24.
  • a generator 14 which may also provide the energy required for ignition of the spark plug 23.
  • the alternator 14 is connected to the ignition device 30 and feeds the alternating current signals into the ignition device 30.
  • the generator 14 also provides a speed signal available, whereby the instantaneous speed n of the crankshaft 13 and the engine 8 is reported to the ignition device 30.
  • the adjoining an intake port 16 of the engine 8 opens into the crankcase 12 and is controlled by the reciprocating piston 10.
  • a position sensor 26 is arranged, the z. B. at fully open throttle emits an operating change signal and thus indicates a change in the operating state of the engine 8.
  • a position sensor 28 can be arranged on the choke flap, which, for example, emits an operating change signal when the choke is closed and thus indicates an operating change, namely the operating mode "Start". If the position sensor 28 is assigned to the open position of the choke flap, the operating change signal is emitted when the choke flap is in its inoperative position, ie the engine experiences no start enrichment, thus running in the normal operating mode.
  • a sensor 29 may be arranged on the mode selector 39, which emits a respective operating change signal when the mode selector 39 is switched in its operating mode.
  • Operating change signals can also be generated if z. B. in the intake passage 38, a sensor, for. B. a pressure sensor 37 is attached.
  • the prevailing in the intake negative pressure can be immediately close to the operating state of the engine, so that when a significant pressure change occurs, for. B. falling below a predetermined pressure value, an operation change signal is issued.
  • the throttle lever 5 a position sensor 25 and the throttle lock 7 to a position sensor 27, wherein both sensors 25 and 27 respectively when operating the respective lever emit a signal which is evaluated as an operating change signal.
  • the ignition device 30 includes a speed control device 50, which is associated with a speed lock circuit 51.
  • a speed control device 50 By means of the speed control device 50, unacceptable speed states of the internal combustion engine 8 are to be avoided. So z. B. via the speed control device 50, the maximum speed of the engine 8 is set as well as an idle speed of the engine.
  • the speed lock circuit 51 specifies a limit speed n G , over which the speed should not increase, in particular at the start of the engine 8.
  • the predetermined limit speed n G is below an engagement speed of the clutch 33, which is designed in particular as a centrifugal clutch.
  • the centrifugal clutch produces a drive connection with the working tool of the implement 1 as a function of the engine speed, wherein a torque-transmitting drive connection with the crankshaft 13 is established above an engagement speed of the clutch 33.
  • a torque-transmitting drive connection with the crankshaft 13 is established above an engagement speed of the clutch 33.
  • Below the Einkuppelprintiere the drive connection is interrupted, so that the working tool is.
  • the working tool does not start uncontrollably.
  • engages the speed lock circuit whose Limit speed n G with a safety margin below the Einkuppelprintiere the centrifugal clutch is. This ensures that at fixed start settings, the engine 8 does not run above the limit speed.
  • the speed lock circuit 51 is only in the operation of the internal combustion engine, d. H. after completion of the starting phase of the internal combustion engine, switched off by generating a deactivation signal.
  • the deactivation signal is z. B. generated by the speed control device 50 when an operating change signal of the implement is detected, so there is a change in the operating mode of the implement.
  • the speed lock circuit 51 is initially turned on.
  • the speed lock circuit 51 thus provides the speed control device 50 with a limit speed nG.
  • the speed control device ensures that the instantaneous speed n remains below the limit speed n G.
  • the sensors 25, 26, 27, 28, 37 output operation change signals indicative of a change in the operating state of the internal combustion engine.
  • the signal of the sensor 25 is processed as an operation change signal in the speed control device 50 and in the speed lock circuit 51 and in response to the speed lock circuit 51 is turned off. The user has the full speed bandwidth of the internal combustion engine available for his work.
  • the speed lock circuit 51 After the speed lock circuit 51 is turned off, it is constantly checked whether the engine is still in operation. Turns off the user, the machine, the speed lock circuit 51 is immediately activated, so that at a next start of the engine, the speed lock circuit 51 limits the allowable speed back to the limit speed no below the Einkuppelprintiere the clutch 33.
  • the position sensor 26 will output an operation change signal when the throttle is moved from the neutral position or is in the full throttle position.
  • the sensor 28 on the choke valve outputs an operation change signal when the choke flap is moved to its open position. Accordingly, upon return of a mode selector from the start mode to the operation mode, the sensor 29 may output an operation change signal which results in turning off the speed lock circuit.
  • a pressure sensor 37 which detects the Ansaugunterdruck in the intake passage 38 and emits an operating change signal in the presence of a corresponding operating pressure, which leads to a deactivation signal which is used to switch off the speed lock circuit.
  • a pressure sensor 37 which detects the Ansaugunterdruck in the intake passage 38 and emits an operating change signal in the presence of a corresponding operating pressure, which leads to a deactivation signal which is used to switch off the speed lock circuit.
  • the pressure conditions will change so, for. B. the negative pressure in the intake and / or sink significantly in the crankcase, indicating the change in the operating mode of the engine. This can be evaluated accordingly and generated according to an operating change signal.
  • the speed control device 50 has a system-related control range, within which a change in the speed in a certain bandwidth is possible. So z. B. the firing angle can be changed as little as any an amount of fuel supplied via a valve. This means that even a speed control device 50 has system-related control limits above which a reasonable regulation is no longer possible.
  • This circumstance can be used to detect the change made by a user of the operating state. Namely, the speed lock circuit 51 is turned on, the speed control device 50 is in their starting position throttle and choke flap their task fair and keep the instantaneous speed n of the engine 8 below the limit speed nG. If the user is full throttle when the speed lock circuit 51 is switched on, then such a high energy input into the internal combustion engine 8 occurs that its instantaneous speed n increases despite the switched-on speed lock circuit 51 and engagement of the speed control device 50 via the limit speed n G. In full throttle position of the throttle lever 5 and the throttle valve 18, the speed control device is no longer able to keep the instantaneous speed n below the limit speed.
  • the speed control circuit will continue to intervene to lower the speed; However, this will not be completely possible due to the design of the overall system.
  • This exceeding of the instantaneous speed n of the internal combustion engine 8 over the limit speed nG of the speed lock circuit 51 is detected and derived from the operating change signal, which - see. Fig. 3 - leads to a deactivation signal for the speed lock circuit 51.
  • the system can recognize that the user is using the machine on the job and turning off the speed lock circuit 51.
  • the operating change signal is generated when the instantaneous speed n of the internal combustion engine 8 is more than 20%, in particular more than 50%, above the limit speed of the rotational speed blocking circuit 51.
  • An operation change signal may also be derived from the increase in instantaneous speed n over time. If the user suddenly gives full throttle, the speed increase of the instantaneous speed n, ie the speed increase over a unit of time, will be significantly steeper than when the engine is idling. In a simple way, the slope, ie the mathematically first derivative of the course of the instantaneous speed over time, ie .DELTA.n / .DELTA.t monitored.
  • an operating change signal is the monitoring of the control activity of the speed control device itself.
  • the operating state of the internal combustion engine can be derived from the frequency of the control interventions of the speed control device for maintaining the limit speed of the speed lock circuit.
  • the speed control circuit will have a control activity when the instantaneous speed of the internal combustion engine approaches the limit speed. H. Make a higher number of control actions into the ignition than when the instantaneous speed is significantly below the limit speed. If the instantaneous speed exceeds the limit speed, the control activity, i. H. the number of control interventions, extremely high.
  • an operation change signal may be derived to generate and apply the deactivation signal for the speed lock circuit.
  • the number of control interventions is monitored over time; If the number of control interventions per unit of time exceeds a predetermined value, this is an indicator that the user has given full throttle and requires the entire speed range. Thus, if the predetermined value of the control interventions per unit time is exceeded, the system outputs an operation change signal, which leads to the shutdown of the speed lock circuit 51.
  • the operating change signal may be advantageous, in the presence of the operating change signal, to generate the deactivation signal for the rotational speed blocking circuit 51 only when a predetermined time has elapsed after the start of the internal combustion engine. In the same way, it may be expedient to generate the deactivation signal only when the operating change signal is present for a predetermined period of time. In a development of the invention, the operating change signal can also form the deactivation signal.

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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)
  • Combined Controls Of Internal Combustion Engines (AREA)

Claims (4)

  1. Procédé pour commander la limitation de régime d'un moteur à combustion interne (8) dans un équipement tenu à la main (1), en particulier une tronçonneuse à chaîne, une tronçonneuse à meule, un taille-haie, une débroussailleuse, un souffleur ou autre,
    - un cylindre (9) du moteur à combustion interne (8) comportant une chambre de combustion (22) limitée par un piston (10), et le piston (10) entraînant par l'intermédiaire d'une bielle (11) un vilebrequin (13), et avec une bougie (23) qui est disposée dans la chambre de combustion (22) et qui est commandée par un dispositif d'allumage (30),
    - et le vilebrequin (13) entraînant un outil par l'intermédiaire d'un accouplement (33) qui se ferme en fonction du régime (n) du moteur, une liaison d'entraînement avec le vilebrequin (13) étant réalisée au-dessus d'un régime d'accouplement de l'accouplement (33), et interrompue au-dessous de ce régime d'accouplement,
    - et avec un dispositif de commande de régime (50) pour le régime (n) du moteur à combustion interne (8), comprenant un circuit de blocage de régime (51) qui limite le régime (n) du moteur à combustion interne à un régime limite (nG) au-dessous du régime d'accouplement,
    - pour démarrer le moteur à combustion interne (8) le circuit de blocage de régime (51) étant mis en marche, et ledit circuit de blocage de régime (51) n'étant arrêté que lors du fonctionnement dudit moteur (8) après qu'un signal de désactivation a été généré,
    caractérisé
    - en ce que le signal de désactivation pour l'arrêt du circuit de blocage de régime (51) actif est généré quand un signal de changement de fonctionnement du moteur à combustion interne (8) est constaté,
    - et le signal de changement de fonctionnement du moteur à combustion interne (8) étant dérivé de la surveillance de l'activité de régulation du dispositif de commande de régime (50) pour respecter le régime limite (nG) du circuit de blocage de régime (51).
  2. Procédé selon la revendication 1,
    caractérisé en ce qu'un signal de changement de fonctionnement pour l'arrêt du circuit de blocage de régime (51) est dérivé quand une valeur prédéfinie des interventions de régulation par unité de temps est dépassée.
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce que le signal de désactivation n'est généré qu'une fois qu'une durée prédéfinie s'est écoulée après le démarrage.
  4. Procédé selon l'une des revendications 1 à 3,
    caractérisé en ce que le signal de désactivation n'est généré qu'une fois que le signal de changement de fonctionnement est appliqué pendant une période prédéfinie.
EP15001954.5A 2011-02-01 2012-01-28 Procédé de commande de la limitation de régime d'un moteur à combustion Active EP2955354B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110010069 DE102011010069A1 (de) 2011-02-01 2011-02-01 Verfahren zur Steuerung der Drehzahlbegrenzung eines Verbrennungsmotors
EP12000557.4A EP2481905B1 (fr) 2011-02-01 2012-01-28 Procédé de commande de la limitation de couple d'un moteur à combustion

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP12000557.4A Division EP2481905B1 (fr) 2011-02-01 2012-01-28 Procédé de commande de la limitation de couple d'un moteur à combustion
EP12000557.4A Division-Into EP2481905B1 (fr) 2011-02-01 2012-01-28 Procédé de commande de la limitation de couple d'un moteur à combustion

Publications (2)

Publication Number Publication Date
EP2955354A1 EP2955354A1 (fr) 2015-12-16
EP2955354B1 true EP2955354B1 (fr) 2018-08-22

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP15001954.5A Active EP2955354B1 (fr) 2011-02-01 2012-01-28 Procédé de commande de la limitation de régime d'un moteur à combustion
EP12000557.4A Active EP2481905B1 (fr) 2011-02-01 2012-01-28 Procédé de commande de la limitation de couple d'un moteur à combustion

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Application Number Title Priority Date Filing Date
EP12000557.4A Active EP2481905B1 (fr) 2011-02-01 2012-01-28 Procédé de commande de la limitation de couple d'un moteur à combustion

Country Status (4)

Country Link
US (1) US9103289B2 (fr)
EP (2) EP2955354B1 (fr)
CN (1) CN102654082B (fr)
DE (1) DE102011010069A1 (fr)

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DE102011120812B4 (de) * 2011-12-10 2022-06-02 Andreas Stihl Ag & Co. Kg Verfahren zum Betrieb eines handgeführten Arbeitsgeräts
DE102012002270A1 (de) 2012-02-04 2013-08-08 Andreas Stihl Ag & Co. Kg Verfahren zum Betrieb eines Arbeitsgerätes mit einem Elektromotor und Arbeitsgerät mit einem Elektromotor
DE102012002225A1 (de) * 2012-02-04 2013-08-08 Andreas Stihl Ag & Co. Kg "Handgeführtes Arbeitsgerät"
DE102012015034A1 (de) * 2012-07-31 2014-02-27 Andreas Stihl Ag & Co. Kg Verfahren zur Abschaltung einer Drehzahlbegrenzung bei einem Verbrennungsmotor
JP6105361B2 (ja) * 2013-04-09 2017-03-29 本田技研工業株式会社 汎用内燃機関の制御装置
DE102013021832A1 (de) * 2013-12-21 2015-06-25 Andreas Stihl Ag & Co. Kg Verfahren zum Betrieb eines handgeführten Arbeitsgeräts mit einem Verbrennungsmotor
JP2016079843A (ja) 2014-10-14 2016-05-16 株式会社やまびこ エンジン駆動式作業機
EP3237739B1 (fr) * 2014-12-23 2020-05-13 Husqvarna AB Moteur à combustion interne et procédé pour le démarrer avec securité
JP6576200B2 (ja) 2015-10-13 2019-09-18 株式会社やまびこ エンジン駆動式作業機
EP3386668B1 (fr) 2015-12-07 2020-01-29 Husqvarna AB Outil lectroportatif, système de contrôle associé et son utilisation, et méthode de contrôle d'un tel outil
US10914245B2 (en) 2015-12-07 2021-02-09 Husqvarna Ab Hand-held power tool and thereto related control system and use and method of controlling
EP3354892B2 (fr) * 2017-01-30 2023-11-22 Andreas Stihl AG & Co. KG Outil de travail portatif comprenant un moteur à combustion et un dispositif de démarrage électrique
JP2018204496A (ja) * 2017-06-01 2018-12-27 株式会社やまびこ エンジン作業機
SE541417C2 (en) 2017-06-12 2019-09-24 Husqvarna Ab A carburetor assembly start setting detection arrangement
DE102018002964A1 (de) 2017-09-15 2019-03-21 Andreas Stihl Ag & Co. Kg Handgeführtes Arbeitsgerät
EP3456949B1 (fr) * 2017-09-15 2020-12-09 Andreas Stihl AG & Co. KG Appareil de travail portatif
US11225922B2 (en) 2018-08-02 2022-01-18 Husqvarna Ab Two-stroke engine control
EP3604778B1 (fr) 2018-08-03 2021-04-07 Andreas Stihl AG & Co. KG Procédé de démarrage d'un moteur à combustion interne
JP2020084794A (ja) * 2018-11-16 2020-06-04 株式会社やまびこ 携帯式のエンジン作業機
SE544026C2 (en) 2020-03-05 2021-11-09 Husqvarna Ab A throttle control mechanism for a surfacing machine
KR20220066619A (ko) * 2020-11-16 2022-05-24 현대두산인프라코어(주) 휠로더에서 스로틀 락 제어시스템 및 그 제어방법

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DE102005038198B4 (de) * 2005-08-12 2021-10-07 Andreas Stihl Ag & Co. Kg Zündschaltung mit einem energiereichen Funken für einen Verbrennungsmotor
DE102006038278B4 (de) * 2006-08-16 2022-02-17 Andreas Stihl Ag & Co. Kg Tragbares, handgeführtes Arbeitsgerät mit einer Datenverbindung zur Diagnose
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Also Published As

Publication number Publication date
DE102011010069A1 (de) 2012-08-02
EP2481905A1 (fr) 2012-08-01
CN102654082A (zh) 2012-09-05
US20120193112A1 (en) 2012-08-02
EP2481905B1 (fr) 2015-08-12
US9103289B2 (en) 2015-08-11
EP2955354A1 (fr) 2015-12-16
CN102654082B (zh) 2016-05-18

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