WO2002020955A1 - Method and device for regulation of a cooling fan drive on an internal combustion engine in a construction or working machine - Google Patents

Method and device for regulation of a cooling fan drive on an internal combustion engine in a construction or working machine Download PDF

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Publication number
WO2002020955A1
WO2002020955A1 PCT/EP2001/010193 EP0110193W WO0220955A1 WO 2002020955 A1 WO2002020955 A1 WO 2002020955A1 EP 0110193 W EP0110193 W EP 0110193W WO 0220955 A1 WO0220955 A1 WO 0220955A1
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WO
WIPO (PCT)
Prior art keywords
construction
fan drive
controller
internal combustion
combustion engine
Prior art date
Application number
PCT/EP2001/010193
Other languages
German (de)
French (fr)
Inventor
Herbert Ziplies
Uwe Esch
Original Assignee
Terex Germany Gmbh & Co. Kg
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 Terex Germany Gmbh & Co. Kg filed Critical Terex Germany Gmbh & Co. Kg
Priority to US10/363,983 priority Critical patent/US20040003782A1/en
Priority to CA002426452A priority patent/CA2426452A1/en
Priority to AU2002213877A priority patent/AU2002213877A1/en
Priority to EP01982242A priority patent/EP1315888A1/en
Priority to JP2002525343A priority patent/JP2004508480A/en
Publication of WO2002020955A1 publication Critical patent/WO2002020955A1/en

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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
    • E02F9/226—Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating
    • 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
    • E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
    • E02F9/2095—Control of electric, electro-mechanical or mechanical equipment not otherwise provided for, e.g. ventilators, electro-driven fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/02—Controlling of coolant flow the coolant being cooling-air
    • F01P7/04—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
    • F01P7/044—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio using hydraulic drives
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
    • F15B11/162—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for giving priority to particular servomotors or users
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2023/00—Signal processing; Details thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2023/00—Signal processing; Details thereof
    • F01P2023/08—Microprocessor; Microcomputer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F01P2025/40—Oil temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/04—Lubricant cooler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20507—Type of prime mover
    • F15B2211/20523—Internal combustion engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20546—Type of pump variable capacity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20576—Systems with pumps with multiple pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/327—Directional control characterised by the type of actuation electrically or electronically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/62—Cooling or heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6343—Electronic controllers using input signals representing a temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/66—Temperature control methods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7058—Rotary output members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/76—Control of force or torque of the output member
    • F15B2211/761—Control of a negative load, i.e. of a load generating hydraulic energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/78—Control of multiple output members
    • F15B2211/781—Control of multiple output members one or more output members having priority

Definitions

  • the invention relates to a method for regulating a fan drive of an internal combustion engine, particularly equipped with a plurality of independent cooling circuits, in construction and / or work machines.
  • DE-A 195 35 674 proposes a method for controlling the cooling device of a, in particular powerful, diesel-powered excavator drive, in that a thermostat provided in the area of the diesel engine releases the flow path from the diesel engine to a water cooler interacting with a fan at a predetermined water temperature, one of which Temperature measuring device arranged in the region of the flow path controls the fan in such a way that the speed of the fan is regulated in the range between 0min "1 and a maximum speed within a predeterminable temperature range above the thermostatically controlled water temperature.
  • a hydraulic drive assembly comprising a variable displacement pump, which is fluidly connected in a closed circuit to a motor in order to drive an auxiliary device, such as a fan.
  • An auxiliary pump can be functionally connected to the pump, the motor and a container in order to replenish the losses of flowing medium in a closed circuit.
  • An auxiliary circuit connected to the pump has a circulation passage that is fluidly connected to the closed circuit downstream of the engine to reduce the required volume of the container.
  • Construction or work machines, in particular hydraulic excavators are designed for certain maximum outputs, which result, for example, from the same repetitive work movements, such as the lifting of the boom and the pivoting of the superstructure relative to the undercarriage.
  • the internal combustion engines of these construction or work machines are usually cooled with water, a controllable fan being provided which is switched on / off by a separate hydraulic drive, in particular controlled by the internal combustion engine, as a function of increasing temperatures in the cooling circuit of the internal combustion engine is regulated.
  • the fan In the normal operating state of the construction or working machine, in particular the hydraulic excavator, the fan is generally switched on when a predetermined temperature value in the cooling circuit of the internal combustion engine is exceeded. The fan then switched on also requires a certain drive power to regulate the temperature of the cooling circuit.
  • the invention has for its object to provide a method and a device for controlling a fan drive, with which the working movements of the construction or work machine can be increased in a performance-increasing manner, without there being any impairment in performance in the area of the internal combustion engine.
  • This object is achieved by a method for regulating a fan drive of an internal combustion engine, particularly equipped with a plurality of independent cooling circuits, in construction and / or work machines, in that the power consumption of the fan drive is regulated towards zero in the case of work processes of the construction and / or work machines that can be predetermined, and this power consumption that of the workflow is added.
  • a device for controlling a fan drive of an internal combustion engine in construction and / or work machines in particular equipped with a plurality of independent cooling circuits, with at least one PI controller per cooling circuit, at least one downstream comparator and at least one with an actuator in Active pulse width modulator.
  • the controller is a ⁇ -controller PI controller.
  • the subject matter of the invention makes it possible to regulate several independently operating cooling circuits of an internal combustion engine from a fan drive via a common actuator to at least two different temperature setpoints, as a result of which the power consumption of the fan drive becomes zero during certain working movements (the fan runs at idle speed) and the Fan power can then be added to the working movement.
  • a ⁇ -controller PI controller per cooling circuit a setpoint / actual value comparison is carried out and the required manipulated variable per cooling circuit is determined.
  • the downstream comparator determines the maximum manipulated variable from the individual manipulated variables and forwards this to a PWM stage (pulse width modulation), which is connected to the actuator.
  • the temperature setpoints of the cooling circuits are raised essentially simultaneously. This regulates the power consumption of the fan drive towards zero (the fan continues to run at idle speed) and the lifting capacity increases by the fan drive power.
  • the lifting capacity when the boom is raised can thereby increase without the drive unit (s) overheating. This is in view of the fact that the assignment of the fan drive power is not necessary continuously, but only in the case of predeterminable, defined work movements of the construction or work machine.
  • An internal combustion engine 1 can be seen, in this example equipped with two mutually independent cooling circuits 2, 3, which in turn are connected via a controller 9 to an actuator 10 on an adjustable fan drive 4 with a fan wheel 5.
  • the hydraulic circuit 1 1 responsible for lifting and lowering the equipment 6, the hydraulic circuit 12 responsible for the fan drive 4 and the hydraulic circuit 20 required for feeding the actuator 10 are indicated.
  • Each cooling circuit 2, 3 is one / Controller Pl controller 13,14 provided, which carries out a setpoint-actual value comparison and calculates the associated manipulated variables per cooling circuit 2,3.
  • the setpoints are made available by a changeover switch 15 to the / controller PI controllers 13, 14.
  • the values determined by the ⁇ -controller PI controllers 13, 14 are fed to a downstream comparison element 16, which determines the maximum manipulated variable from the individual manipulated variables and forwards them to a PWM stage 17 (pulse width modulation stage), which communicates via line 18 with the Actuator 10 is connected.
  • PWM stage 17 pulse width modulation stage
  • the temperature setpoints of the cooling circuits 2, 3 are now raised to higher temperature setpoints by means of a switch 19 and the changeover switch 15 during such a working movement.
  • the power consumption of the fan drive 4 is regulated towards zero via the line 18 and the actuator 10.
  • the fan wheel 5 then runs out or at idle.
  • the hydraulic drive power of the fan drive 4, which is now no longer required to operate the fan wheel 5, is thus added to the lifting power of the equipment 6, without the engine 1 overheating.
  • the hydraulic fan drive 4 is switched back to the fan wheel 5, the increased temperature setpoints per cooling circuit 2, 3 again being assigned to a lower temperature setpoint via the switch 19 and the changeover switch 1 5.
  • This performance game can repeat itself in any order, which ultimately depending on the maximum power to be assigned to the respective movement sequence.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Operation Control Of Excavators (AREA)

Abstract

The invention relates to a method for regulation of a cooling fan drive on an internal combustion engine, in particular equipped with several independent cooling circuits, in a construction or working machine, whereby the power drain of the cooling fan drive is set to approximately zero during certain working stages of the construction and/or working and said power drain may be added to the capacity for the working stage.

Description

Verfahren und Einrichtung zur Regelung eines Lüfterantriebes einer Brennkraftmaschine in Bau- und/oder Arbeitsmaschinen Method and device for controlling a fan drive of an internal combustion engine in construction and / or work machines
Die Erfindung betrifft ein Verfahren zur Regelung eines Lüfterantriebes einer, insbesondere mit mehreren voneinander unabhängigen Kühlkreisläufen ausgestatteten Brennkraftmaschine in Bau- und/oder Arbeitsmaschinen.The invention relates to a method for regulating a fan drive of an internal combustion engine, particularly equipped with a plurality of independent cooling circuits, in construction and / or work machines.
In der DE-A 195 35 674 wird ein Verfahren zur Regelung der Kühleinrichtung eines, insbesondere leistungsstarken dieselmotorischen Baggerantriebes vorgeschlagen, indem ein im Bereich des Dieselmotors vorgesehener Thermostat bei einer vorgegebenen Wassertemperatur den Strömungsweg vom Dieselmotor zu einem mit einem Lüfter zusammenwirkenden Wasserkühler freigibt, wobei eine im Bereich des Strömungsweges angeordnete Temperaturmeßeinrichtung den Lüfter dergestalt ansteuert, daß innerhalb eines vorgebbaren Temperaturbereiches oberhalb der thermostatgeregelten Wassertemperatur die Drehzahl des Lüfters im Bereich zwischen 0min"1 und einer Maximaldrehzahl geregelt wird.DE-A 195 35 674 proposes a method for controlling the cooling device of a, in particular powerful, diesel-powered excavator drive, in that a thermostat provided in the area of the diesel engine releases the flow path from the diesel engine to a water cooler interacting with a fan at a predetermined water temperature, one of which Temperature measuring device arranged in the region of the flow path controls the fan in such a way that the speed of the fan is regulated in the range between 0min "1 and a maximum speed within a predeterminable temperature range above the thermostatically controlled water temperature.
Durch die DE-A 198 25 759 ist eine hydraulische Antriebsbaugruppe bekannt geworden, umfassend eine Verstellpumpe, die strömungsfähig in einem geschlossenen Kreislauf mit einem Motor verbunden ist, um eine Hilfsvorrichtung anzutreiben, wie beispielsweise einen Lüfter. Eine Hilfspumpe kann funktioneil mit der Pumpe, dem Motor und einem Behälter verbunden werden, um die Verluste an fließendem Medium im geschlossenen Kreislauf wieder aufzufüllen. Ein Hilfskreislauf, der mit der Pumpe verbunden ist, weist einen Umlaufdurchgang auf, der strömungsfähig mit dem geschlossenen Kreislauf stromabwärts vom Motor verbunden ist, um das erforderliche Volumen des Behälters zu reduzieren. Bau- oder Arbeitsmaschinen, insbesondere Hydraulikbagger, werden für bestimmte maximale Leistungen ausgelegt, die sich z.B. aus zum Teil stets wiederkehrenden gleichen Arbeitsbewegungen, wie beispielsweise das Anheben des Auslegers und das Verschwenken des Oberwagens gegenüber dem Unterwagen, ergeben.From DE-A 198 25 759 a hydraulic drive assembly has become known, comprising a variable displacement pump, which is fluidly connected in a closed circuit to a motor in order to drive an auxiliary device, such as a fan. An auxiliary pump can be functionally connected to the pump, the motor and a container in order to replenish the losses of flowing medium in a closed circuit. An auxiliary circuit connected to the pump has a circulation passage that is fluidly connected to the closed circuit downstream of the engine to reduce the required volume of the container. Construction or work machines, in particular hydraulic excavators, are designed for certain maximum outputs, which result, for example, from the same repetitive work movements, such as the lifting of the boom and the pivoting of the superstructure relative to the undercarriage.
Die Brennkraftmaschinen dieser Bau- oder Arbeitsmaschinen, insbesondere Hydraulikbagger, werden üblicherweise mit Wasser gekühlt, wobei ein regelbarer Lüfter vorgesehen ist, der von einem separaten, insbesondere von der Brennkraftmaschine angesteuerten hydraulischen Antrieb in Abhängigkeit sich erhöhender Temperaturen im Kühlkreislauf der Brennkraftmaschine in zuschaltender/abschaltender Weise geregelt wird.The internal combustion engines of these construction or work machines, in particular hydraulic excavators, are usually cooled with water, a controllable fan being provided which is switched on / off by a separate hydraulic drive, in particular controlled by the internal combustion engine, as a function of increasing temperatures in the cooling circuit of the internal combustion engine is regulated.
Im normalen Betriebszustand der Bau- oder Arbeitsmaschine, insbesondere des Hydraulikbaggers, ist der Lüfter in der Regel dann zugeschaltet, wenn ein vorgegebener Temperaturwert im Kühlkreislauf der Brennkraftmaschine überschritten wird. Der dann zugeschaltete Lüfter benötigt zur Regelung der Temperatur des Kühlkreislaufes auch eine bestimmte Antriebsleistung.In the normal operating state of the construction or working machine, in particular the hydraulic excavator, the fan is generally switched on when a predetermined temperature value in the cooling circuit of the internal combustion engine is exceeded. The fan then switched on also requires a certain drive power to regulate the temperature of the cooling circuit.
Damit steht die volle Antriebsleistung der Brennkraftmaschine, beispielsweise für das Anheben eines Auslegers, bedingt durch den Leistungsabgriff des zugeschalteten Lüfters, nicht zur Verfügung, und damit kann es in bestimmten Grenzbereichen dazu führen, daß die dem Arbeitsablauf zuzuordnende Leistung der Brennkraftmaschine nicht mehr ausreicht.This means that the full drive power of the internal combustion engine, for example for lifting a boom, due to the power tap of the connected fan, is not available, and it can therefore result in certain limit ranges that the performance of the internal combustion engine to be assigned to the workflow is no longer sufficient.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Einrichtung zur Regelung eines Lüfterantriebes bereitzustellen, mit welchen die Arbeitsbewegungen der Bau- oder Arbeitsmaschine in leistungserhöhender Weise angehoben werden können, ohne daß es zu Leistungsbeeinträchtigungen im Bereich der Brennkraftmaschine kommt. Diese Aufgabe wird gelöst durch ein Verfahren zur Regelung eines Lüfterantriebes einer, insbesondere mit mehreren voneinander unabhängigen Kühlkreisläufen ausgestatteten Brennkraftmaschine in Bau- und/oder Arbeitsmaschinen, indem die Aufnahmeleistung des Lüfterantriebes bei vorgebbaren Arbeitsabläufen der Bau- und/oder Arbeitsmaschinen gegen Null geregelt und diese Aufnahmeleistung derjenigen des Arbeitsablaufes hinzu addiert wird.The invention has for its object to provide a method and a device for controlling a fan drive, with which the working movements of the construction or work machine can be increased in a performance-increasing manner, without there being any impairment in performance in the area of the internal combustion engine. This object is achieved by a method for regulating a fan drive of an internal combustion engine, particularly equipped with a plurality of independent cooling circuits, in construction and / or work machines, in that the power consumption of the fan drive is regulated towards zero in the case of work processes of the construction and / or work machines that can be predetermined, and this power consumption that of the workflow is added.
Vorteilhafte Weiterbildungen des Erfindungsgegenstandes sind den zugehörigen verfahrensgemäßen Unteransprüchen zu entnehmen.Advantageous developments of the subject matter of the invention can be found in the associated procedural subclaims.
Diese Aufgabe wird auch gelöst durch eine Einrichtung zur Regelung eines Lüfterantriebes einer, insbesondere mit mehreren voneinander unabhängigen Kühlkreisläufen ausgestatteten Brennkraftmaschine in Bau- und/oder Arbeitsmaschinen, mit mindestens einem Pl-Regler je Kühlkreislauf, mindestens einem nachgeschalteten Vergleicher sowie mindestens einem mit einem Stellorgan in Wirkverbindung stehenden Pulsweitenmodulator.This object is also achieved by a device for controlling a fan drive of an internal combustion engine in construction and / or work machines, in particular equipped with a plurality of independent cooling circuits, with at least one PI controller per cooling circuit, at least one downstream comparator and at least one with an actuator in Active pulse width modulator.
Der Regler ist einem weiteren Gedanken der Erfindung gemäß ein μ-Controller- Pl-Regler.According to a further idea of the invention, the controller is a μ-controller PI controller.
Der Erfindungsgegenstand ermöglicht es, mehrere unabhängig voneinander arbeitende Kühlkreisläufe einer Brennkraftmaschine von einem Lüfterantrieb über ein gemeinsames Stellorgan auf mindestens zwei unterschiedliche Temperatur-Sollwerte zu regeln, wodurch die Aufnahmeleistung des Lüfterantriebes bei bestimmten Arbeitsbewegungen gleich Null wird (der Lüfter läuft im Leerlauf mit) und die Lüfterleistung dann der Arbeitsbewegung hinzu addiert werden kann. Mit einem μ-Controller-PI-Regler je Kühlkreislauf wird ein Soll-Istwert-Vergleich durchgeführt und die notwendige Stellgröße je Kühlkreislauf ermittelt. Der nachgeschaltete Vergleicher ermittelt aus den einzelnen Stellgrößen die maximale Stellgröße und leitet diese an eine PWM-Stufe (Pulsweitenmodulation) weiter, welche mit dem Stellorgan verbunden ist. Bei einer bestimmten Arbeitsbewegung, beispielsweise das Anheben eines Auslegers bei einem Hydraulikbagger, werden die Temperatur-Sollwerte der Kühlkreisläufe im wesentlichen gleichzeitig angehoben. Dadurch wird die Aufnahmeleistung des Lüfterantriebes gegen Null geregelt (der Lüfter läuft im Leerlauf weiter) und die Hubleistung erhöht sich um die Lüfterantriebsleistung.The subject matter of the invention makes it possible to regulate several independently operating cooling circuits of an internal combustion engine from a fan drive via a common actuator to at least two different temperature setpoints, as a result of which the power consumption of the fan drive becomes zero during certain working movements (the fan runs at idle speed) and the Fan power can then be added to the working movement. With a μ-controller PI controller per cooling circuit, a setpoint / actual value comparison is carried out and the required manipulated variable per cooling circuit is determined. The downstream comparator determines the maximum manipulated variable from the individual manipulated variables and forwards this to a PWM stage (pulse width modulation), which is connected to the actuator. In the case of a specific work movement, for example the lifting of a boom in a hydraulic excavator, the temperature setpoints of the cooling circuits are raised essentially simultaneously. This regulates the power consumption of the fan drive towards zero (the fan continues to run at idle speed) and the lifting capacity increases by the fan drive power.
In Abhängigkeit von der Größe der Bau- oder Arbeitsmaschine, insbesondere bei einem Groß-Hydraulikbagger, kann sich dadurch die Hubleistung beim Anheben des Auslegers erhöhen, ohne daß eine Überhitzung des oder der Antriebsaggregate eintritt. Dies im Hinblick darauf, daß die Zuordnung der Lüfterantriebsleistung nicht kontinuierlich, sondern nur bei vorgebbaren definierten Arbeitsbewegungen der Bau- oder Arbeitsmaschine notwendig ist.Depending on the size of the construction or work machine, particularly in the case of a large hydraulic excavator, the lifting capacity when the boom is raised can thereby increase without the drive unit (s) overheating. This is in view of the fact that the assignment of the fan drive power is not necessary continuously, but only in the case of predeterminable, defined work movements of the construction or work machine.
Die einzige Figur stellt eine Prinzipskizze dar und wird wie folgt beschrieben:The only figure is a schematic diagram and is described as follows:
Erkennbar ist eine Brennkraftmaschine 1 , in diesem Beispiel ausgestattet mit zwei voneinander unabhängigen Kühlkreisläufen 2,3, die ihrerseits über einen Controller 9, mit einem Stellorgan 10 an einem verstellbaren Lüfterantrieb 4 mit einem Lüfterrad 5 verbunden sind. Des weiteren erkennbar ist eine Ausrüstung 6, beispielsweise der Ausleger eines nicht weiter dargestellten Hydraulikbaggers, der an einem nur angedeuteten Oberwagen 7 gelagert und mittels Hydraulikzylindern 8 heb- und senkbar ist. Angedeutet ist der für das Heben und Senken der Ausrüstung 6 zuständige Hydraulikkreis 1 1 , der für den Lüfterantrieb 4 zuständige Hydraulikkreis 12 sowie der für die Speisung des Stellorgans 10 erforderliche Hydraulikkreislauf 20. Je Kühlkreislauf 2,3 ist ein /-Controller-Pl-Regler 13,14 vorgesehen, der einen Soll-Istwert- Vergleich durchgeführt und die zugehörigen Stellgrößen je Kühlkreislauf 2,3 errechnet. Die Sollwerte werden von einem Umschalter 15 den /-Controller-Pl-Reglern 13,14 zur Verfügung gestellt. Die von den μ-Controller-PI-Reglern 13,14 ermittelten Werte werden einem nachgeschalteten Vergleichselement 16 zugeleitet, das aus den einzelnen Stellgrößen die maximale Stellgröße ermittelt und an eine PWM-Stufe 17 (Pulsweitenmodulationsstufe) weiterleitet, die über die Leitung 18 mit dem Stellorgan 10 verbunden ist. Ein Teil der Antriebsleistung der Brennkraftmaschine 1 wird somit unter anderem dem Arbeitsablauf der Ausrüstung 6 zugeordnet, während ein weiterer Teil der Antriebsleistung für das Lüfterrad 5 benötigt wird, um die Brennkraftmaschine 1 vor Überhitzung zu schützen. Bei bestimmten Arbeitsabläufen, beispielsweise beim Anheben der Ausrüstung 6, über die Hydraulikzylinder 8, kann es geschehen, daß die für das Anheben der Ausrüstung 6 benötigte Antriebsleistung der Brennkraftmaschine 1 nicht vollständig ausreicht.An internal combustion engine 1 can be seen, in this example equipped with two mutually independent cooling circuits 2, 3, which in turn are connected via a controller 9 to an actuator 10 on an adjustable fan drive 4 with a fan wheel 5. Also recognizable is equipment 6, for example the boom of a hydraulic excavator, not shown, which is mounted on an only indicated superstructure 7 and can be raised and lowered by means of hydraulic cylinders 8. The hydraulic circuit 1 1 responsible for lifting and lowering the equipment 6, the hydraulic circuit 12 responsible for the fan drive 4 and the hydraulic circuit 20 required for feeding the actuator 10 are indicated. Each cooling circuit 2, 3 is one / Controller Pl controller 13,14 provided, which carries out a setpoint-actual value comparison and calculates the associated manipulated variables per cooling circuit 2,3. The setpoints are made available by a changeover switch 15 to the / controller PI controllers 13, 14. The values determined by the μ-controller PI controllers 13, 14 are fed to a downstream comparison element 16, which determines the maximum manipulated variable from the individual manipulated variables and forwards them to a PWM stage 17 (pulse width modulation stage), which communicates via line 18 with the Actuator 10 is connected. Part of the drive power of the internal combustion engine 1 is thus assigned, inter alia, to the workflow of the equipment 6, while a further part of the drive power is required for the fan wheel 5 in order to protect the internal combustion engine 1 from overheating. In certain work processes, for example when lifting the equipment 6, via the hydraulic cylinders 8, it can happen that the drive power of the internal combustion engine 1 required for lifting the equipment 6 is not completely sufficient.
Erfindungsgemäß werden nun bei einer derartigen Arbeitsbewegung die Temperatur-Sollwerte der Kühlkreisläufe 2,3 mittels eines Schalters 19 und des Umschalters 15 auf höhere Temperatur-Sollwerte angehoben. Dadurch wird über die Leitung 18 und das Stellorgan 10 die Aufnahmeleistung des Lüfterantriebes 4 gegen Null geregelt. Das Lüfterrad 5 läuft dann aus oder im Leerlauf mit. Die hydraulische Antriebsleistung des Lüfterantriebes 4, die nun nicht mehr zum Betreiben des Lüfterrades 5 benötigt wird, wird somit auf die Hubleistung der Ausrüstung 6 hinzu addiert, ohne daß eine Überhitzung der Brennkraftmaschine 1 damit einhergeht. Sobald der bestimmte Bewegungsablauf abgeschlossen ist, wird der hydraulische Lüfterantrieb 4 wieder auf das Lüfterrad 5 geschaltet, wobei die erhöhten Temperatur- Sollwerte je Kühlkreislauf 2,3 wieder über den Schalter 19 und den Umschalter 1 5 einem unteren Temperatur-Sollwert zugeordnet werden. Dieses Leistungsspiel kann sich in beliebiger Folge wiederholen, was letztendlich abhängig von der dem jeweiligen Bewegungsablauf zuzuordnenden maximalen Leistung zu sehen ist. According to the invention, the temperature setpoints of the cooling circuits 2, 3 are now raised to higher temperature setpoints by means of a switch 19 and the changeover switch 15 during such a working movement. As a result, the power consumption of the fan drive 4 is regulated towards zero via the line 18 and the actuator 10. The fan wheel 5 then runs out or at idle. The hydraulic drive power of the fan drive 4, which is now no longer required to operate the fan wheel 5, is thus added to the lifting power of the equipment 6, without the engine 1 overheating. As soon as the specific movement sequence is completed, the hydraulic fan drive 4 is switched back to the fan wheel 5, the increased temperature setpoints per cooling circuit 2, 3 again being assigned to a lower temperature setpoint via the switch 19 and the changeover switch 1 5. This performance game can repeat itself in any order, which ultimately depending on the maximum power to be assigned to the respective movement sequence.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Verfahren zur Regelung eines Lüfterantriebes (4) einer, insbesondere mit mehreren voneinander unabhängigen Kühlkreisläufen (2,3) ausgestatteten Brennkraftmaschine (1 ) in Bau- und/oder Arbeitsmaschinen, indem die Aufnahmeleistung des Lüfterantriebes (4) bei vorgebbaren Arbeitsabläufen der Bau- und/oder Arbeitsmaschine gegen Null geregelt und diese Aufnahmeleistung derjenigen des Arbeitsablaufes hinzu addiert wird.1. Method for controlling a fan drive (4) of an internal combustion engine (1), in particular equipped with a plurality of independent cooling circuits (2, 3), in construction and / or work machines, in that the power consumption of the fan drive (4) in the case of specifiable work processes of the construction and / or the work machine is regulated towards zero and this input power is added to that of the workflow.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, daß der Kühlkreislauf (2,3) auf mindestens zwei unterschiedlichen Temperatur- Sollwerten geregelt wird, wobei bei vorgebbaren Arbeitsabläufen der Bau- oder Arbeitsmaschine mittels eines Schalters (19) und eines Umschalters (15) der eine Temperatur-Sollwert auf einen höheren Temperatur-Sollwert geregelt und die Arbeitsleistung des Lüfterantriebes (4) gegen Null geführt wird.2. The method according to claim 1, characterized in that the cooling circuit (2, 3) is regulated to at least two different temperature setpoints, wherein in the case of predeterminable workflows of the construction or work machine by means of a switch (19) and a changeover switch (15) a temperature setpoint is regulated to a higher temperature setpoint and the work output of the fan drive (4) is brought towards zero.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß bei Vorhandensein mehrerer Kühlkreisläufe (2,3) jeder Kühlkreislauf (2,3) über ein gemeinsames Stellorgan (10) auf mindestens zwei unterschiedliche Temperatur-Sollwerte geregelt wird.3. The method according to claim 1 or 2, characterized in that in the presence of several cooling circuits (2, 3) each cooling circuit (2, 3) is regulated via a common actuator (10) to at least two different temperature setpoints.
4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß mit einem //-Controller-Pl-Regler (13,14) je Kühlkreislauf (2,3) ein Temperatur-Soll-Istwert-Vergleich durchgeführt und die zulässige Stellgröße je Kühlkreislauf (2,3) ermittelt wird.4. The method according to any one of claims 1 to 3, characterized in that with a // controller PI controller (13, 14) per cooling circuit (2, 3) a temperature setpoint / actual value comparison is carried out and the permissible manipulated variable is determined for each cooling circuit (2,3).
5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß ein mit dem bzw. den Pl-Regler(n) (13,14) zusammenwirkender Vergleicher (16) aus der bzw. den Stellgröße(n) eine maximale Stellgröße ermittelt und diese an eine mit dem Stellorgan (10) in Wirkverbindung stehende Pulsweitenmodulationsstufe (17) weiterleitet.5. The method according to any one of claims 1 to 4, characterized in that one with the or the PI controller (s) (13,14) cooperating Comparator (16) determines a maximum manipulated variable from the manipulated variable (s) and forwards it to a pulse width modulation stage (17) that is operatively connected to the actuating element (10).
6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß bei einer vorgebbaren Arbeitsbewegung der Bau- und/oder Arbeitsmaschine, insbesondere dem Anheben des Auslegers (6) eines Hydraulikbaggers, die Temperatur-Sollwerte aller Kühlkreisläufe (2,3) im wesentlichen gleichzeitig angehoben werden, wodurch die Aufnahmeleistung des Lüfterantriebes (4), insbesondere im Leerlauf des Lüfterrades (5), gegen Null geregelt und die Antriebsleistung des Lüfterantriebes (4) dem Bewegungsablauf der Bau- und/oder6. The method according to any one of claims 1 to 5, characterized in that the temperature setpoints of all cooling circuits (2,3) in a predetermined work movement of the construction and / or working machine, in particular the lifting of the boom (6) of a hydraulic excavator are increased substantially at the same time, whereby the power input of the fan drive (4), in particular when the fan wheel (5) is idling, is regulated towards zero and the drive power of the fan drive (4) the movement sequence of the construction and / or
, Arbeitsmaschine, insbesondere der Hubleistung des Auslegers (6), in selbige Leistung erhöhender Weise zugeordnet wird., Work machine, in particular the lifting capacity of the boom (6), is assigned in the same capacity increasing manner.
7. Einrichtung zur Regelung eines Lüfterantriebes (4) einer insbesondere mit mehreren voneinander unabhängigen Kühlkreisläufen (2,3) ausgestatteten Brennkraftmaschine (1 ) in Bau- und/oder Arbeitsmaschinen, mit mindestens einem Umschalter (1 5), mindestens einem Pl-Regler (13,14) je Kühlkreislauf (2,3), mindestens einem nachgeschalteten Vergleicher (16) sowie mindestens einem mit einem Stellorgan (10) in Wirkverbindung stehenden Pulsweitenmodulator (17).7. Device for controlling a fan drive (4) of an internal combustion engine (1) in construction and / or work machines, in particular equipped with a plurality of independent cooling circuits (2, 3), with at least one changeover switch (1 5), at least one PI controller ( 13, 14) per cooling circuit (2, 3), at least one downstream comparator (16) and at least one pulse width modulator (17) that is operatively connected to an actuator (10).
8. Einrichtung nach Anspruch 7, dadurch gekennzeichnet, daß der Regler (13,14) ein //-Controller-Pl-Regler ist. 8. Device according to claim 7, characterized in that the controller (13, 14) is a // controller-PI controller.
PCT/EP2001/010193 2000-09-08 2001-09-05 Method and device for regulation of a cooling fan drive on an internal combustion engine in a construction or working machine WO2002020955A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US10/363,983 US20040003782A1 (en) 2000-09-08 2001-09-05 Method and device for regulation of a cooling fan drive on an internal combustion engine in a construction or working machine
CA002426452A CA2426452A1 (en) 2000-09-08 2001-09-05 Method and device for regulation of a cooling fan drive on an internal combustion engine in a construction or working machine
AU2002213877A AU2002213877A1 (en) 2000-09-08 2001-09-05 Method and device for regulation of a cooling fan drive on an internal combustion engine in a construction or working machine
EP01982242A EP1315888A1 (en) 2000-09-08 2001-09-05 Method and device for regulation of a cooling fan drive on an internal combustion engine in a construction or working machine
JP2002525343A JP2004508480A (en) 2000-09-08 2001-09-05 Method and apparatus for controlling a fan drive of an internal combustion engine in construction and / or work machines

Applications Claiming Priority (2)

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DE10044607A DE10044607A1 (en) 2000-09-08 2000-09-08 Method and device for controlling a fan drive of an internal combustion engine in construction and / or work machines
DE10044607.8 2000-09-08

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JP (1) JP2004508480A (en)
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EP1315888A1 (en) 2003-06-04
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DE10044607A1 (en) 2002-04-04
AU2002213877A1 (en) 2002-03-22

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