US20120020811A1 - Fan Control - Google Patents

Fan Control Download PDF

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Publication number
US20120020811A1
US20120020811A1 US13/184,117 US201113184117A US2012020811A1 US 20120020811 A1 US20120020811 A1 US 20120020811A1 US 201113184117 A US201113184117 A US 201113184117A US 2012020811 A1 US2012020811 A1 US 2012020811A1
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US
United States
Prior art keywords
hydraulic
fan
control circuit
fan control
pump
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.)
Abandoned
Application number
US13/184,117
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English (en)
Inventor
Wilhelm Kraeutler
Christof Gassner
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.)
Liebherr Werk Nenzing GmbH
Original Assignee
Liebherr Werk Nenzing GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Liebherr Werk Nenzing GmbH filed Critical Liebherr Werk Nenzing GmbH
Assigned to LIEBHERR-WERK NENZING GMBH reassignment LIEBHERR-WERK NENZING GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GASSNER, CHRISTOF, KRAEUTLER, WILHELM
Publication of US20120020811A1 publication Critical patent/US20120020811A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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

Definitions

  • the present disclosure relates to a hydraulic fan control circuit for a machine, in particular for a motor vehicle, a construction machine or a lifting device, with at least one hydraulic pump and at least one hydraulic motor for driving at least one fan.
  • a hydraulically driven fan In large cooling systems for internal combustion engines keeping the cooling fluid, charge air and oil temperatures constant with variable engine load and ambient temperature is achieved by a hydraulically driven fan.
  • the medium to be cooled flows through the fan region and is cooled to a defined temperature level by the air flow generated.
  • a hydraulic motor For driving the fan mechanism a hydraulic motor is used, which is mechanically connected with the ventilator of the fan and is part of the hydraulic circuit.
  • Such hydraulic circuits consist of a hydraulic pump which sucks in hydraulic fluid from a corresponding hydraulic tank.
  • the hydraulic fluid flows from the hydraulic pump to the hydraulic motor, in order to drive the same.
  • the hydraulic pump generally is connected with the drive train of the machine or the vehicle and accordingly is driven by the internal combustion engine.
  • fan drive the combination of hydraulic motor and the corresponding fan mechanism (e.g., ventilator) is to be understood.
  • One fan drive is responsible for example for cooling the charge air of the internal combustion engine, one fan drive for cooling the cooling liquid of the internal combustion engine, and one further fan drive for cooling the hydraulic oil for the hydraulic system. Further alternative task areas are of course conceivable.
  • the object of the present invention consists in providing a circuit arrangement for a hydraulic circuit for driving a fan system which permits an independent regulation of the individual fan drives.
  • a hydraulic fan control circuit for a machine in particular for a motor vehicle, a construction machine or a lifting device is proposed, comprising at least one hydraulic pump and at least one hydraulic motor for driving at least one fan wherein a hydraulic motor driving torque of at least one hydraulic motor is controllable by adjusting an absorption volume of the at least one hydraulic motor.
  • the hydraulic pump preferably is connectable or connected with the drive train of the machine such that a driving force acts on the hydraulic pump.
  • the hydraulic pump sucks in the hydraulic fluid from the connected hydraulic tank and delivers the hydraulic medium via corresponding lines to one or more hydraulic motors for driving at least one fan.
  • the number of incorporated hydraulic motors is not limited.
  • the present disclosure is not limited to hydraulic motors for the fan drive, but the hydraulic motors can have further alternative drive tasks.
  • the hydraulic motor drive torque of at least one hydraulic motor can be controlled by adjusting the corresponding absorption volume in accordance with the present disclosure.
  • the absorption volume describes the amount of hydraulic fluid turned over by the hydraulic motor per revolution.
  • the absorption volume of each individual hydraulic motor of the fan control circuit is controllable, e.g., via one or more valves are adjustable geometry of the hydraulic motor, so that an independent configuration of the individual hydraulic motors is possible.
  • this embodiment in accordance with the present disclosure also allows the selective shut-off or shut-down of a fan within the fan circuit.
  • At least one hydraulic pump is configured as variable displacement pump.
  • the hydraulic flux volume flow within the fan control circuit can be regulated and the prevailing hydraulic pressure within the system can be influenced. This opens up a central possibility for adjusting the respective speed of the interconnected fan drives or hydraulic motors. As in fan drives the required driving torque rises with the speed, the speed of a plurality of fan drives can be varied by regulating the driving torque over the adjustable motors.
  • variable displacement pump exclusively delivers the hydraulic medium volume flow necessary for the required speed.
  • a stepless regulation of the fan speed in a range between standstill of the fan and maximum speed is provided.
  • the economy of the fan control circuit according to the present disclosure can further be optimized and at any time be adapted to the existing environmental and operating conditions.
  • At least two fan drives and/or hydraulic motors are interconnected in the fan control circuit parallel to each other. Connecting the hydraulic motors in parallel effects equal pressure levels at the inlet of the hydraulic motors.
  • connection of a pressure regulator to the fan circuit can be expedient.
  • the fan circuit is designed for the cooling of one or more machine components.
  • at least one hydraulic motor with connected fan is provided for cooling the charge air of an internal combustion engine of the machine.
  • a hydraulic motor with fan for cooling the water cooling system of the internal combustion engine or for cooling the hydraulic oil.
  • the present disclosure furthermore is directed to a motor vehicle, a construction machine or a lifting device with a hydraulic fan control circuit in accordance with one of the aforementioned combinations of features.
  • the hydraulic fan control circuit preferably is configured according to one of the aforementioned configuration possibilities, so that a renewed explanation thereof will be omitted at this point.
  • FIG. 1 shows a circuit diagram for the hydraulic fan control circuit of the present disclosure with two fans.
  • FIG. 2 shows a further circuit diagram for the hydraulic fan control circuit of the present disclosure with three fans.
  • FIG. 1 shows a circuit diagram for the hydraulic fan control circuit in accordance with the present disclosure.
  • FIG. 1 shows a machine 100 , which can be a motor vehicle, construction machine, or a lifting device, with the hydraulic fan control circuit 120 .
  • the circuit substantially consists of a single hydraulic variable displacement pump 10 which is designed for one flow direction.
  • the variable displacement pump 10 is connectable or connected with the drive train of a construction machine or a lifting device and is driven by the Diesel unit 122 associated to the machine 100 .
  • the variable displacement pump 10 sucks in the hydraulic fluid from the hydraulic tank 60 and delivers the hydraulic medium to the hydraulic motors 20 , 30 via the hydraulic lines.
  • the hydraulic medium delivered is delivered to the hydraulic motors 20 , 30 which each are mechanically connected with a fan arrangement in the form of a ventilator 50 .
  • Both hydraulic motors 20 , 30 can be regulated independently, namely such that their resulting driving torques are adjustable by adjusting the absorption volume of the hydraulic motors 20 , 30 .
  • Each fan drive may be coupled to a different component requiring cooling airflow.
  • the fan drive including motor 20 is coupled to an air charge of the internal combustion engine 240
  • the fan drive including motor 30 is coupled to the cooling liquid of the internal combustion engine 142 .
  • Further additional fan drives may be added and may be coupled to a heat exchanger within which the hydraulic oil for the hydraulic system passes to cool the oil. Further alternative task areas are of course conceivable.
  • a control system 130 including a controller 132 receiving data from a plurality of sensors 134 sensing operating condition.
  • the control includes computer readable media or a system on a chip for carrying out instructions or operations based on the sensed data, including sending control signals to each of the actuators 136 and 138 of the motors 20 and 30 , respectively, for independently controlling the absorption volume of the motors to provide different rotation speeds for the fans. In this way, the different cooling needs of the components can be accommodated at the same instance.
  • Both hydraulic motors 20 , 30 are interconnected parallel to each other within the hydraulic system, so that at both hydraulic motors 20 , 30 an identical pressure level is obtained.
  • the speed of the fan drives 20 , 30 can be varied with only one variable displacement pump 10 by adjusting the driving torque, i.e. by adjusting the absorption volume of the motors 20 , 30 and by keeping the hydraulic pressure constant.
  • the hydraulic pump 19 is configured as variable displacement pump
  • the hydraulic flux volume flow within the fan control circuit can be regulated at a first flow by the control system and the prevailing hydraulic pressure within the system can be influenced to a first pressure, while at the same time the control system can adjust the respective speed of the interconnected fan drives or hydraulic motors with respect to one another so that motor 20 operates at a first, lower speed, and motor 30 operates at a second, higher speed, at the same time.
  • control system may adjust the pump 10 to increase the hydraulic flux volume flow within the fan control circuit to a second, higher flow than the first flow (with the prevailing hydraulic pressure within the system to a second, higher pressure than the first pressure), while at the same time the control system still adjust the respective speeds of the interconnected fan drives or hydraulic motors with respect to one another so that motor 20 operates at a third speed lower than a fourth speed of motor 30 , but with both the third and fourth speeds greater than the first and second speeds.
  • still other combinations of speeds may also be used.
  • variable displacement pump 10 exclusively delivers the hydraulic volume flow required for the speed to the system. Thus, a performance-optimized drive is possible in a single-circuit system.
  • the speed of the fans 50 can steplessly be varied in a range between standstill and maximum speed by adjusting the motor absorption volume of the hydraulic motors 20 , 30 .
  • the circuit hence satisfies the criterion to be able to operate one or more fan drives independent of each other.
  • FIG. 2 shows the configuration of the hydraulic fan control circuit of the present disclosure with three hydraulic motors 20 , 30 , 100 for operating one fan mechanism 50 each. While not repeated in FIG. 2 , the additional control system and related components requiring cooling are included as well.
  • the configuration provides the parallel connection of three hydraulic motors 20 , 30 , 100 and substantially corresponds to the configuration of FIG. 1 . Identical components of the hydraulic fan control circuit are designated with the same reference numerals.
  • the two fan control circuits of FIGS. 1 and 2 are suitable for use in large machines, in particular in large mobile machines such as construction machines or lifting devices.
  • the circuit arrangement is integrated in the hydraulic circuit of the machines mostly present anyway and is suitable for a particularly performance-optimized operation of the cooling system.
  • the individual interconnected fans can be controlled independent of each other and therefore allow a particularly economic operation.
  • individual fan drive units can be shut down, which in the previous configurations known from the prior art has only been possible by integrating additional circuit components.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Fluid-Pressure Circuits (AREA)
US13/184,117 2010-07-22 2011-07-15 Fan Control Abandoned US20120020811A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010031835A DE102010031835A1 (de) 2010-07-22 2010-07-22 Lüfterregelung
DE102010031835.3 2010-07-22

Publications (1)

Publication Number Publication Date
US20120020811A1 true US20120020811A1 (en) 2012-01-26

Family

ID=44993994

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/184,117 Abandoned US20120020811A1 (en) 2010-07-22 2011-07-15 Fan Control

Country Status (4)

Country Link
US (1) US20120020811A1 (zh)
EP (1) EP2410150A1 (zh)
CN (1) CN202370877U (zh)
DE (1) DE102010031835A1 (zh)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9718345B2 (en) 2014-06-05 2017-08-01 Liebherr-Mining Equipment Colmar Sas Dump truck or truck
US9822736B2 (en) 2011-03-09 2017-11-21 Hamm Ag Self-propelled construction device, in particular a soil compactor
US10450939B2 (en) 2016-04-28 2019-10-22 Deere & Company Multiple plane recirculation fan control for a cooling package
GB2592989A (en) * 2020-03-13 2021-09-15 Caterpillar Sarl Flow sharing control for multiple hydraulic fan motors
CN115126701A (zh) * 2022-06-24 2022-09-30 德耐尔能源装备有限公司 一种无油移动机液压马达风扇装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022111020A1 (de) 2022-05-04 2023-11-09 Man Truck & Bus Se Hydrostatischer Antrieb für ein Nutzfahrzeug und Verfahren zum Betreiben eines hydrostatischen Antriebs eines Nutzfahrzeugs

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942486A (en) * 1974-08-21 1976-03-09 The United States Of America As Represented By The Secretary Of The Army Hydraulic fan drive system speed control
US3992883A (en) * 1975-10-01 1976-11-23 Lucas Industries Limited Fan drive systems
JPS60174500A (ja) * 1984-02-20 1985-09-07 Ishikawajima Harima Heavy Ind Co Ltd 冷水塔の冷却フアン駆動装置
US4709666A (en) * 1985-03-14 1987-12-01 Zahnradfabrik Friedrichshafen, Ag. Regulatable fan drive
DE3834201A1 (de) * 1988-04-22 1989-11-02 Rexroth Mannesmann Gmbh Anordnung zum zufuehren von druckmittel zu hydraulischen verbrauchern
JPH0949427A (ja) * 1995-08-09 1997-02-18 Shin Caterpillar Mitsubishi Ltd 建設機械の冷却制御装置
JPH09317465A (ja) * 1996-05-31 1997-12-09 Komatsu Ltd 冷却用ファンの油圧駆動装置
US5851441A (en) * 1995-10-30 1998-12-22 Ishikawajima-Harima Jukogyo Kabushiki Kaisha System for controlling hydraulic drive for cooling fan in cooling tower
US6349882B1 (en) * 1999-12-22 2002-02-26 Komatsu Ltd. Controlling device for hydraulically operated cooling fan
US20020189255A1 (en) * 2001-06-14 2002-12-19 Callas James J. Combined remote first intake air aftercooler and a second fluid from an engine cooler for an engine
US20120057989A1 (en) * 2008-12-18 2012-03-08 Doosan Infracore Co., Ltd. Cooling device for construction machinery
US20120305232A1 (en) * 2011-06-01 2012-12-06 Joseph Vogele Ag Construction machine with automatic fan rotational speed regulation

Family Cites Families (6)

* Cited by examiner, † Cited by third party
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US4036432A (en) * 1975-11-03 1977-07-19 George Albert L Variable speed fan drive system
DE3707739A1 (de) * 1987-03-11 1988-09-22 Amazonen Werke Dreyer H Hydraulikanlage fuer den antrieb eines streugeraetes
US6463891B2 (en) * 1999-12-17 2002-10-15 Caterpillar Inc. Twin fan control system and method
KR100631071B1 (ko) * 2005-04-20 2006-10-02 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 건설기계의 펌프 유량 제어 장치 및 그 제어 방법
JP4573751B2 (ja) * 2005-11-02 2010-11-04 日立建機株式会社 走行式作業機械の冷却ファン駆動装置
DE102007058534B4 (de) * 2007-12-06 2016-01-21 Deere & Company Kühlanordnung mit hydraulisch angetriebenen Lüftern

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942486A (en) * 1974-08-21 1976-03-09 The United States Of America As Represented By The Secretary Of The Army Hydraulic fan drive system speed control
US3992883A (en) * 1975-10-01 1976-11-23 Lucas Industries Limited Fan drive systems
JPS60174500A (ja) * 1984-02-20 1985-09-07 Ishikawajima Harima Heavy Ind Co Ltd 冷水塔の冷却フアン駆動装置
US4709666A (en) * 1985-03-14 1987-12-01 Zahnradfabrik Friedrichshafen, Ag. Regulatable fan drive
DE3834201A1 (de) * 1988-04-22 1989-11-02 Rexroth Mannesmann Gmbh Anordnung zum zufuehren von druckmittel zu hydraulischen verbrauchern
JPH0949427A (ja) * 1995-08-09 1997-02-18 Shin Caterpillar Mitsubishi Ltd 建設機械の冷却制御装置
US5851441A (en) * 1995-10-30 1998-12-22 Ishikawajima-Harima Jukogyo Kabushiki Kaisha System for controlling hydraulic drive for cooling fan in cooling tower
JPH09317465A (ja) * 1996-05-31 1997-12-09 Komatsu Ltd 冷却用ファンの油圧駆動装置
US6349882B1 (en) * 1999-12-22 2002-02-26 Komatsu Ltd. Controlling device for hydraulically operated cooling fan
US20020189255A1 (en) * 2001-06-14 2002-12-19 Callas James J. Combined remote first intake air aftercooler and a second fluid from an engine cooler for an engine
US6546919B2 (en) * 2001-06-14 2003-04-15 Caterpillar Inc Combined remote first intake air aftercooler and a second fluid from an engine cooler for an engine
US20120057989A1 (en) * 2008-12-18 2012-03-08 Doosan Infracore Co., Ltd. Cooling device for construction machinery
US20120305232A1 (en) * 2011-06-01 2012-12-06 Joseph Vogele Ag Construction machine with automatic fan rotational speed regulation

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
English Abstract of JP09049427A dated February 18, 1997 *
Machine Translation of DE3834201A1 of November 2, 1989 *
Wendel, Glenn R., et al. "Balance of Power -- Hydraulic-powered components add to vehicle efficiency, reduce emissions", Fall 2006. *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9822736B2 (en) 2011-03-09 2017-11-21 Hamm Ag Self-propelled construction device, in particular a soil compactor
US9718345B2 (en) 2014-06-05 2017-08-01 Liebherr-Mining Equipment Colmar Sas Dump truck or truck
US10450939B2 (en) 2016-04-28 2019-10-22 Deere & Company Multiple plane recirculation fan control for a cooling package
GB2592989A (en) * 2020-03-13 2021-09-15 Caterpillar Sarl Flow sharing control for multiple hydraulic fan motors
GB2592989B (en) * 2020-03-13 2022-07-13 Caterpillar Sarl Flow sharing control for multiple hydraulic fan motors
CN115126701A (zh) * 2022-06-24 2022-09-30 德耐尔能源装备有限公司 一种无油移动机液压马达风扇装置

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Publication number Publication date
CN202370877U (zh) 2012-08-08
EP2410150A1 (de) 2012-01-25
DE102010031835A1 (de) 2012-01-26

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Legal Events

Date Code Title Description
AS Assignment

Owner name: LIEBHERR-WERK NENZING GMBH, AUSTRIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KRAEUTLER, WILHELM;GASSNER, CHRISTOF;REEL/FRAME:026601/0222

Effective date: 20110621

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION