EP0073288A1 - Dispositif pour régler automatiquement la vitesse de rotation d'un moteur d'excavatrice - Google Patents

Dispositif pour régler automatiquement la vitesse de rotation d'un moteur d'excavatrice Download PDF

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Publication number
EP0073288A1
EP0073288A1 EP82102601A EP82102601A EP0073288A1 EP 0073288 A1 EP0073288 A1 EP 0073288A1 EP 82102601 A EP82102601 A EP 82102601A EP 82102601 A EP82102601 A EP 82102601A EP 0073288 A1 EP0073288 A1 EP 0073288A1
Authority
EP
European Patent Office
Prior art keywords
speed
engine
lever
control
working
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
EP82102601A
Other languages
German (de)
English (en)
Other versions
EP0073288B1 (fr
Inventor
Kurt-Arno Dr. Kruse
Manfred Grahl
Werner Kock
Heinz Mehldau
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.)
Atlas Terex GmbH
Original Assignee
Hinrich Weyhausen KG Maschinenfabrik
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 Hinrich Weyhausen KG Maschinenfabrik filed Critical Hinrich Weyhausen KG Maschinenfabrik
Priority to AT82102601T priority Critical patent/ATE20269T1/de
Publication of EP0073288A1 publication Critical patent/EP0073288A1/fr
Application granted granted Critical
Publication of EP0073288B1 publication Critical patent/EP0073288B1/fr
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2292—Systems with two or more pumps
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2246—Control of prime movers, e.g. depending on the hydraulic load of work tools
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D17/00—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling
    • F02D17/04—Controlling engines by cutting out individual cylinders; Rendering engines inoperative or idling rendering engines inoperative or idling, e.g. caused by abnormal conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
    • F02D29/04—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving pumps
    • 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 a method for automatically regulating or controlling the engine speed of an earth-moving device, in particular a hydraulic excavator - i.e. here to adapt the engine speed to the respective working conditions - between a working speed and a second speed below the working speed.
  • the invention further relates to one intended for carrying out the method according to the invention and suitable device with a control element which, on the one hand - usually via a Bowden cable or the like.
  • a control element which, on the one hand - usually via a Bowden cable or the like.
  • a control lever which, on the one hand - usually via a Bowden cable or the like.
  • throttle manually operated control lever
  • a acting on the fuel regulator for the engine usually designed as a diesel engine speed control lever in connection.
  • the motor of such an earth-moving device such as a hydraulic excavator or the like. usually designed as a diesel engine and has a so-called.
  • Regulator with which the fuel quantity to be supplied to the fuel injection pump via a lever referred to above as the speed adjustment lever is to be set (to be “regulated") which is supplied to the combustion chambers of the diesel engine by which To drive the engine at a certain speed, which in turn is a measure of the power required from the engine.
  • Throttle lever designated control lever arranged, by means of which the driver via a connecting element acting on the speed adjusting lever (possibly also via a chain of such connecting elements) regulates the speed and thus regulates the power output from Can perform driver's seat.
  • This "connecting link” can be a so-called steering linkage and / or a Bowden cable or the like. act.
  • an actuation of the control lever arranged in the area of the driver's seat acts on the speed adjustment lever of the fuel regulator, so that the engine speed and thus the engine output can be adjusted with the aid of this control lever.
  • the operator e.g. the excavator driver
  • uses the control lever to set the speed required for the task at hand (e.g. unloading pipe sections from a truck onto a flat surface or the like) and thus the engine power and then begins to carry out the task the work item.
  • this is a pre-control pressure-dependent speed regulation between the idle speed (or a idle speed above the idle speed) and the maximum speed, the engine when subjected to ..- a constant pressure maximum speed goes.
  • the present invention has for its object to improve the known device of the type described above in particular that the excavator or the like. Even if the control energy triggering the intended automatic regulation still fails, it is also desirable that, in the case of a low pressure requirement of the working hydraulics, such as is present, for example, in the work cycle "lower load", with the fuel-saving low speed (according to the invention: idling speed ) works and not with the high working speed which is inevitably established in the known device, which inevitably occurs in the known device because the control lever must be deflected when starting work.
  • the "automatic" mechanism according to the invention is not intended to actually regulate the speed, as is the case with the known device, but rather the working speed (and thus the engine power) which is adapted to the particular task by the excavator operator is still set in advance by means of a cable.
  • the engine speed set by the excavator operator at the beginning of a specific work task - that is to say adapted to this work task - is automatically switched down to the idling speed of the engine over a predetermined time interval when the work task is interrupted, and that the engine speed is switched on again recording of the work task is automatically shifted up to the work speed originally set by the excavator operator in adaptation to the work task in question.
  • control member is to be actuated automatically via a control means controlled by a pressure measuring device arranged in the hydraulic circuit when the pressure drops below a predetermined (first) limit pressure in the hydraulic circuit in such a way that it disengages the speed control lever acting on the fuel regulator by means of the control lever set working position in a (second) position corresponding to the idling speed of the engine, and that when the limit pressure is exceeded - which may be above the above-mentioned threshold value for the above-described first limit pressure - the control element is automatically returned to its position corresponding to the work task becomes.
  • Fig. 1 of the drawing shows a circuit diagram for a device according to the invention for automatic regulation or control, i.e. to adapt the engine speed of a hydraulic excavator to the respective working conditions, between a working speed and a second speed below the working speed, in the present case the idling speed, the excavator operator setting the adjusted working speed by means of the control lever (throttle lever) when taking up a certain work task that the excavator works with a certain output, and when a certain, pregivable or adjustable pause time occurs when a work break occurs, the engine speed is automatically switched back to the idling speed, on the other hand it is automatically reset to the one previously set by the excavator operator when the work task is resumed Speed can be shifted up.
  • the control lever throttle lever
  • Fig. 1 - the reference numerals in the other figures are chosen for the same or equivalent parts - is 1 with the diesel engine of a hydraulic system Baggers referred to, which is coupled to hydraulic pumps 3 and 4 via a mechanical coupling 2 which is always in engagement and is shown schematically in the drawing.
  • the pumps 3 and 4 feed into a line system 6, which leads to consumers, as has been indicated or indicated by arrows 7.
  • a pressure switch 9 is assigned to the shuttle valve, which has a switch 11 which can be set to a setting value of, for example, 40 bar. When this limit pressure of, for example, 40 bar is reached, the switch 11 triggers an electrical contact which leads to a timing relay which has an input 13 and an output 14.
  • Lines 16 lead from the output 14 of the time relay 12 to a magnetic switch 17, with which an air valve 18, which is arranged downstream of the magnetic switch 17, is to be actuated, which is located in a compressed air line 19 indicated by dash-dot-dash lines, which is from the Air valve 18 leads to a piston-cylinder unit 21, to the end 22 of the cylinder 23 of the piston-cylinder unit 21.
  • a Bowden cable 24 engages, the other with it End with a pivotable about its base 27 control lever 26 is attached.
  • a pressure spring 29 acts on the underside of the piston 28 of the piston-cylinder unit 21, the other end of which is located on the inside of the cylinder 23 supports and pushes the piston 28 normally in Fig. 1 to the left.
  • the piston rod 31 of the piston 28 is connected at its free end by means of a joint 32 to a lever 33 which is supported in an articulated manner at its center and which is acted upon by a spring 34 at its free end and which is the speed adjustment lever which is on the Regulator for the fuel injection pipe of the diesel engine 1 acts.
  • a stop 36 is arranged in alignment with the piston rod 31, or the like by means of a screw 37. is adjustable.
  • the excavator operator before starting to carry out a specific work task, uses the control lever 26 arranged in the area of the driver's seat to set the appropriate engine speed which is adapted to the work task concerned and is therefore (usually considerably) above the idle cutting speed.
  • the control lever 26 therefore does not act directly on the fuel regulator, but via the Bowden cable 24, the piston-cylinder unit 21 and the speed adjustment lever 33, so that the rigid coupling of the control lever 26 with the speed adjustment lever 33, which was previously customary, does not is available.
  • the piston 28 of the piston-cylinder unit 21 is located on the far left immediately before the dead center position in the cylinder 23, ie the excavator driver has set the working speed to the maximum speed. Instead, however, could also an intermediate working speed between the maximum engine speed and idling speed has been set, as is very often the case, and for which the device according to the invention is particularly suitable.
  • the engine operating speed is, for example, 2300 rpm, while the idling speed of the engine, at which the fuel consumption is known to decrease to 1/6 to 1/8, is usually in the range between 700 and 1000 rpm.
  • the switch 11 of the pressure switch 9 opens, whereupon the input signal at the input 13 of the time relay 12 goes to "O", meanwhile not yet the signal s present at the output 14 of the time relay 12, which still remains at "1". Only when a certain delay time A t of, for example, 5 seconds has elapsed, that is, the work break lasts longer than, for example, for taking up a new pipe or the like. is necessary, the output signal also goes to "O", as this is shown in the representation of the corresponding signals s 13 of the input 13 or s14, FIG. 2 the time dependence and assignment of the signals s 13 and s 14 and their dependence from time t shows.
  • the time relay 12 opens, whereupon the air line 19 which has been interrupted by the air valve 18 is made continuous so that compressed air flows into the cylinder 23 via the air line 38 and the Piston 28 moves back against the action of the compression spring 29 from the position shown in FIG. 1 to the position shown in FIG. 4, which is limited by the fact that the free end (at 32) of the piston rod 31 strikes against the adjustable stop 36, so that the piston 28, 31 can not move.
  • the speed adjusting lever 33 is therefore pivoted about the joint 39 serving for its bearing, and the engine speed thereby becomes different from that previously automatically set to idle speed by means of the control lever 26, so that the engine works considerably more fuel-efficiently during work breaks, since the engine losses at a speed of, for example, 700 rpm are known to be considerably smaller than, for example, at a speed of 1500 or even 2300 rpm. min, and above all, the splashing losses of the pumps, which operate at high speed or maximum speed with full delivery volume, are considerably lower at reduced speed.
  • a particular advantage of the device according to the invention - not only in the illustrated embodiment - is that the system according to the invention, which is based on the idea of lowering the speed when longer breaks occur, allows the excavator to fail if the control energy fails, albeit not with the invention intended fuel saving mode of operation - rubar can work, which is known not to be the case with previously known devices of a similar type, since an interruption in the supply of control energy (only) causes the initially set working speed to be restored, while the loss of control energy in the known one described above
  • the result of this device is that the engine remains at basic idle speed or adjusts to it and is therefore no longer capable of working.
  • Another advantage of the device according to the invention and the method according to the invention is that in cases in which the load does not require energy, but even makes it available, as is the case, for example, in the work cycle "lowering load", the engine speed is low (namely to idle speed) remains, since the working hydraulics signal low pressure requirement, while in the known device due to the required deflection of the control lever, the engine is started up, so that it also works, for example, in the work cycle "lowering the load” or the like. works at high speed and corresponding fuel consumption.
  • FIG. 3 also shows an emergency off circuit for the device according to the invention, the stop 36 being located in an electrical circuit.
  • an embodiment is useful in diesel engines, the (intentional) switching off not by a separate Bowden cable or the like. takes place, but as it were by an "excessive idle setting", so that in such engines, the device according to the invention could possibly lead to a complete shutdown of the engine when paused, or when paused, which is not intended and is also known to be cumbersome, particularly in the case of diesel engines - apart from the stresses at the start - because starting diesel engines is a little more difficult than with petrol engines. In such a case, therefore, the stop 36 ensures that the engine does not switch off when the speed is reduced during breaks, but rather that it continues to run at idling speed.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Operation Control Of Excavators (AREA)
  • Disintegrating Or Milling (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Soil Working Implements (AREA)
  • High-Pressure Fuel Injection Pump Control (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
  • Paper (AREA)
  • Earth Drilling (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
EP82102601A 1981-08-28 1982-03-27 Dispositif pour régler automatiquement la vitesse de rotation d'un moteur d'excavatrice Expired EP0073288B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82102601T ATE20269T1 (de) 1981-08-28 1982-03-27 Vorrichtung zum selbsttaetigen regeln der motordrehzahl eines erdbaugeraetes.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3134068 1981-08-28
DE3134068A DE3134068C2 (de) 1981-08-28 1981-08-28 Vorrichtung zum selbsttätigen Regeln der Motordrehzahl eines Erdbaugerätes

Publications (2)

Publication Number Publication Date
EP0073288A1 true EP0073288A1 (fr) 1983-03-09
EP0073288B1 EP0073288B1 (fr) 1986-06-04

Family

ID=6140333

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82102601A Expired EP0073288B1 (fr) 1981-08-28 1982-03-27 Dispositif pour régler automatiquement la vitesse de rotation d'un moteur d'excavatrice

Country Status (6)

Country Link
EP (1) EP0073288B1 (fr)
JP (1) JPS5844132A (fr)
AT (1) ATE20269T1 (fr)
DE (1) DE3134068C2 (fr)
DK (1) DK154312C (fr)
NO (1) NO155852C (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4773369A (en) * 1985-02-28 1988-09-27 Kabushiki Kaisha Komatsu Seisakusho Method of controlling an output of an internal combustion engine and/or a variable displacement hydraulic pump driven by the engine
US4836165A (en) * 1986-04-01 1989-06-06 Kabushiki Kaisha Komatsu Seisakusho Engine controlling apparatus for a wheeled type construction machine
US4838755A (en) * 1987-02-19 1989-06-13 Deere & Company Automatic engine control for an excavator
EP0353799A1 (fr) * 1988-07-04 1990-02-07 Hitachi Construction Machinery Co., Ltd. Dispositif pour régler la vitesse de rotation d'un engin de terrassement
EP0391029A2 (fr) * 1989-04-07 1990-10-10 Joseph Vögele AG Procédé et dispositif de régulation de la vitesse de rotation d'un moteur diesel d'une finisseuse de route
FR2645591A1 (fr) * 1989-04-10 1990-10-12 Linde Ag Procede et dispositif pour le fonctionnement d'une unite motrice notamment des excavatrices ou analogues
US4989567A (en) * 1989-07-19 1991-02-05 Kabushiki Kaisha Kobe Seiko Sho Engine speed controlling system in construction machine
EP0546239A1 (fr) * 1991-11-13 1993-06-16 Shin Caterpillar Mitsubishi Ltd. Méthode de contrôle d'un moteur pour entraîner une pompe hydraulique contrôlant un actuateur hydraulique pour machine de construction
EP1666711A1 (fr) * 2003-09-02 2006-06-07 Komatsu Ltd. Procede et dispositif de commande de la puissance de sortie d'un moteur pour machine de travail

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61142338A (ja) * 1984-12-13 1986-06-30 Komatsu Ltd オ−トデセル装置付きエンジンの制御方法
JPS60256528A (ja) * 1984-05-31 1985-12-18 Komatsu Ltd 油圧駆動機械のエンジン制御方法
JPS62275507A (ja) * 1986-05-21 1987-11-30 Sumitomo Heavy Ind Ltd アルミ箔用母材の製造装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2862587A (en) * 1956-10-26 1958-12-02 James L Baughman Brake pedal actuated auxiliary decelerator for internal combustion engines
FR2258529A1 (fr) * 1974-01-23 1975-08-18 Akermans Verkstad Ab
FR2496172A1 (fr) * 1980-12-11 1982-06-18 Richier Sa Nle Indle Dispositif pour mettre automatiquement au ralenti le moteur thermique d'un engin, en particulier d'un engin de travaux publics

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2862587A (en) * 1956-10-26 1958-12-02 James L Baughman Brake pedal actuated auxiliary decelerator for internal combustion engines
FR2258529A1 (fr) * 1974-01-23 1975-08-18 Akermans Verkstad Ab
FR2496172A1 (fr) * 1980-12-11 1982-06-18 Richier Sa Nle Indle Dispositif pour mettre automatiquement au ralenti le moteur thermique d'un engin, en particulier d'un engin de travaux publics

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4773369A (en) * 1985-02-28 1988-09-27 Kabushiki Kaisha Komatsu Seisakusho Method of controlling an output of an internal combustion engine and/or a variable displacement hydraulic pump driven by the engine
US4836165A (en) * 1986-04-01 1989-06-06 Kabushiki Kaisha Komatsu Seisakusho Engine controlling apparatus for a wheeled type construction machine
US4838755A (en) * 1987-02-19 1989-06-13 Deere & Company Automatic engine control for an excavator
EP0353799A1 (fr) * 1988-07-04 1990-02-07 Hitachi Construction Machinery Co., Ltd. Dispositif pour régler la vitesse de rotation d'un engin de terrassement
US4955344A (en) * 1988-07-04 1990-09-11 Hitachi Construction Machinery Co., Ltd. Apparatus for controlling rotational speed of prime mover of construction machine
EP0628665A1 (fr) 1988-07-04 1994-12-14 Hitachi Construction Machinery Co., Ltd. Dispositif pour régler la vitesse de rotation du moteur d'un engin de terrassement
EP0391029A3 (fr) * 1989-04-07 1991-06-05 Joseph Vögele AG Procédé et dispositif de régulation de la vitesse de rotation d'un moteur diesel d'une finisseuse de route
EP0391029A2 (fr) * 1989-04-07 1990-10-10 Joseph Vögele AG Procédé et dispositif de régulation de la vitesse de rotation d'un moteur diesel d'une finisseuse de route
FR2645591A1 (fr) * 1989-04-10 1990-10-12 Linde Ag Procede et dispositif pour le fonctionnement d'une unite motrice notamment des excavatrices ou analogues
US4989567A (en) * 1989-07-19 1991-02-05 Kabushiki Kaisha Kobe Seiko Sho Engine speed controlling system in construction machine
EP0546239A1 (fr) * 1991-11-13 1993-06-16 Shin Caterpillar Mitsubishi Ltd. Méthode de contrôle d'un moteur pour entraîner une pompe hydraulique contrôlant un actuateur hydraulique pour machine de construction
US5286171A (en) * 1991-11-13 1994-02-15 Shin Caterpillar Mitsubishi Ltd. Method for controlling engine for driving hydraulic pump to operate hydraulic actuator for construction equipment
EP1666711A1 (fr) * 2003-09-02 2006-06-07 Komatsu Ltd. Procede et dispositif de commande de la puissance de sortie d'un moteur pour machine de travail
EP1666711A4 (fr) * 2003-09-02 2009-01-07 Komatsu Mfg Co Ltd Procede et dispositif de commande de la puissance de sortie d'un moteur pour machine de travail
US7979183B2 (en) 2003-09-02 2011-07-12 Komatsu Ltd. Method and device for controlling power output of engine for working machine
US8010260B2 (en) 2003-09-02 2011-08-30 Komatsu Ltd. Method and device for controlling power output of engine for working machine
US8428833B2 (en) 2003-09-02 2013-04-23 Komatsu Ltd. Method and device for controlling power output of engine for working machine
US8768582B2 (en) 2003-09-02 2014-07-01 Komatsu Ltd. Method and device for controlling power output of engine for working machine

Also Published As

Publication number Publication date
ATE20269T1 (de) 1986-06-15
NO155852B (no) 1987-03-02
JPS5844132A (ja) 1983-03-15
DE3134068C2 (de) 1984-05-10
DK154312C (da) 1989-04-03
EP0073288B1 (fr) 1986-06-04
NO155852C (no) 1987-06-10
DK239682A (da) 1983-03-01
DE3134068A1 (de) 1983-03-17
NO821062L (no) 1983-03-01
DK154312B (da) 1988-10-31

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