EP1315888A1 - Procede et dispositif de reglage d'un entrainement de ventilateur sur un moteur a combustion interne dans des machines-outils et/ou machines de construction - Google Patents

Procede et dispositif de reglage d'un entrainement de ventilateur sur un moteur a combustion interne dans des machines-outils et/ou machines de construction

Info

Publication number
EP1315888A1
EP1315888A1 EP01982242A EP01982242A EP1315888A1 EP 1315888 A1 EP1315888 A1 EP 1315888A1 EP 01982242 A EP01982242 A EP 01982242A EP 01982242 A EP01982242 A EP 01982242A EP 1315888 A1 EP1315888 A1 EP 1315888A1
Authority
EP
European Patent Office
Prior art keywords
construction
fan drive
controller
internal combustion
combustion engine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP01982242A
Other languages
German (de)
English (en)
Inventor
Herbert Ziplies
Uwe Esch
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.)
Terex Germany GmbH and Co KG
Original Assignee
Terex Germany GmbH and 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 and Co KG filed Critical Terex Germany GmbH and Co KG
Publication of EP1315888A1 publication Critical patent/EP1315888A1/fr
Withdrawn legal-status Critical Current

Links

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.

Landscapes

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

Abstract

L'invention concerne un procédé de réglage d'un entraînement de ventilateur sur un moteur à combustion interne, équipé en particulier de plusieurs circuits de refroidissement indépendants, dans des machines-outils et/ou machines de construction. Selon ce procédé, la consommation de l'entraînement de ventilateur est réglée à environ zéro à certains cycles de travail prédéfinis de la machine-outil et/ou machine de construction et cette consommation est ajoutée à la capacité relative au cycle de travail.
EP01982242A 2000-09-08 2001-09-05 Procede et dispositif de reglage d'un entrainement de ventilateur sur un moteur a combustion interne dans des machines-outils et/ou machines de construction Withdrawn EP1315888A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10044607 2000-09-08
DE10044607A DE10044607A1 (de) 2000-09-08 2000-09-08 Verfahren und Einrichtung zur Regelung eines Lüfterantriebes einer Brennkraftmaschine in Bau- und/oder Arbeitsmaschinen
PCT/EP2001/010193 WO2002020955A1 (fr) 2000-09-08 2001-09-05 Procede et dispositif de reglage d'un entrainement de ventilateur sur un moteur a combustion interne dans des machines-outils et/ou machines de construction

Publications (1)

Publication Number Publication Date
EP1315888A1 true EP1315888A1 (fr) 2003-06-04

Family

ID=7655616

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01982242A Withdrawn EP1315888A1 (fr) 2000-09-08 2001-09-05 Procede et dispositif de reglage d'un entrainement de ventilateur sur un moteur a combustion interne dans des machines-outils et/ou machines de construction

Country Status (7)

Country Link
US (1) US20040003782A1 (fr)
EP (1) EP1315888A1 (fr)
JP (1) JP2004508480A (fr)
AU (1) AU2002213877A1 (fr)
CA (1) CA2426452A1 (fr)
DE (1) DE10044607A1 (fr)
WO (1) WO2002020955A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005344766A (ja) * 2004-06-01 2005-12-15 Komatsu Ltd 作業車両の油圧回路
DE102004028354A1 (de) * 2004-06-11 2006-01-05 Siemens Ag Vorrichtung zum Betreiben eines Lüfters
US7395788B2 (en) * 2005-03-22 2008-07-08 Atlas Copco Rock Drills Ab Drill rig and a method for controlling a fan therein
US9009993B2 (en) 2012-09-21 2015-04-21 Harnischfeger Technologies, Inc. Internal venting system for industrial machines
US9574660B2 (en) 2014-02-21 2017-02-21 Federal Signal Corporation Hydraulic fan drive system
DE102015226268A1 (de) * 2015-12-21 2017-06-22 Robert Bosch Gmbh Verfahren und Steuergerät zum Betreiben einer mit einer Welle eines Lüfters gekoppelten Schwungmasse
US10330126B2 (en) * 2016-12-16 2019-06-25 Caterpillar Inc. Fan control system with electro-hydraulic valve providing three fan motor operational positions
CN111356808B (zh) * 2017-11-23 2022-03-22 沃尔沃建筑设备公司 用于工程机械的驱动系统和用于控制该驱动系统的方法
US11555291B2 (en) 2020-04-06 2023-01-17 Deere & Company Self-propelled work vehicle and method implementing perception inputs for cooling fan control operations
DE102020110821A1 (de) 2020-04-21 2021-10-21 Liebherr-Werk Telfs Gmbh Planierraupe

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3813894A (en) * 1972-03-17 1974-06-04 Peugeot & Renault Cooling apparatus for an automobile vehicle

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2603196A (en) * 1950-03-04 1952-07-15 Fluor Corp System for cooling engine liquids
JPS6126585Y2 (fr) * 1980-12-25 1986-08-09
DE19535674A1 (de) 1995-09-26 1997-03-27 Orenstein & Koppel Ag Verfahren zur Regelung der Kühleinrichtung eines dieselmotorischen Baggerantriebes sowie Kühleinrichtung für dieselmotorische Baggerantriebe
EP0946384A1 (fr) * 1996-12-24 1999-10-06 Itt Automotive Electrical Systems, Inc. Ventilateur a commande hydraulique et servodirection pour vehicule
US6076488A (en) * 1997-03-17 2000-06-20 Shin Caterpillar Mitsubishi Ltd. Cooling device for a construction machine
US5875630A (en) 1997-06-10 1999-03-02 Sauer Inc. Hydraulic drive assembly
US6195989B1 (en) * 1999-05-04 2001-03-06 Caterpillar Inc. Power control system for a machine
US6055946A (en) * 1999-08-02 2000-05-02 Navistar International Transportation Corp Crankshaft-mounted cooling fan with power takeoff capability
US6273034B1 (en) * 2000-05-17 2001-08-14 Detroit Diesel Corporation Closed loop fan control using fan motor pressure feedback
US6604360B1 (en) * 2002-04-18 2003-08-12 Deere & Company Exhaust driven engine cooling system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3813894A (en) * 1972-03-17 1974-06-04 Peugeot & Renault Cooling apparatus for an automobile vehicle

Also Published As

Publication number Publication date
JP2004508480A (ja) 2004-03-18
AU2002213877A1 (en) 2002-03-22
US20040003782A1 (en) 2004-01-08
DE10044607A1 (de) 2002-04-04
CA2426452A1 (fr) 2003-04-24
WO2002020955A1 (fr) 2002-03-14

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