CA2426452A1 - 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
CA2426452A1
CA2426452A1 CA002426452A CA2426452A CA2426452A1 CA 2426452 A1 CA2426452 A1 CA 2426452A1 CA 002426452 A CA002426452 A CA 002426452A CA 2426452 A CA2426452 A CA 2426452A CA 2426452 A1 CA2426452 A1 CA 2426452A1
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CA
Canada
Prior art keywords
construction
fan motor
power
accordance
cooling circuit
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
CA002426452A
Other languages
French (fr)
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
Individual
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 Individual filed Critical Individual
Publication of CA2426452A1 publication Critical patent/CA2426452A1/en
Abandoned 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
    • E02F9/226—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

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

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

Method And Device For Regulation Of A Cooling Fan Drive On An Internal Combustion Engine In A Construction Or Working Machine This invention concerns a process for regulating the fan motor of internal combustion engines in construction or work machines, particularly those with several independent cooling circuits.
In DE-A 195 35 674, a process is proposed for regulating the cooling system of excavators, particularly those with powerful diesel engines, where a thermostat located in the area of the diesel engine opens the flow from the diesel engine to a water cooler with an integrated fan at a predetermined temperature, so that a temperature measuring device installed in the area of the flow controls the fan in such a way that, within a given temperature range above the thermostat-regulated water temperature, the rotation speed of the fan is set in the range between Omiri' and a maximum rotation speed.
In DE-A 198 25 759, a hydraulic drive subassembly, including a variable displacement pump, which is connected in a closed circuit with a motor to drive an auxiliary device such as a fan, is described. An auxiliary pump can be functionally connected with the pump, the engine and a container so that losses of the fluid in the closed circuit are replenished.
An auxiliary circuit, which is connected to the pump, has a bypass that is connected with the closed circuit upstream of the motor in order to reduce the required volume of the container.
Construction or work machines, particularly hydraulic excavators, are designed for certain maximum performances that consist of, for example, performing repetitive operations such as raising the boom and moving the upper chassis relative to the lower chassis.
The internal combustion engines in these construction and work machines, particularly hydraulic excavators, are normally water-cooled and have an adjustable fan which is turned on and off in response to rises in the temperature in the cooling circuit of the engine by a separate hydraulic motor usually controlled from the engine.

During the normal operation of construction or work machines, particularly hydraulic excavators, the fans are usually turned on when a predetermined temperature is exceeded in the engine's cooling circuit. 'The operating fan requires a certain amount of power to regulate the temperature of the cooling circuit.
Then, not all the motor's power is available, for example to raise a boom, because of the loss of power to the operating fan, and, in certain marginal ranges, this can result in the power of the engine being insufficient to perform the work.
This purpose of this invention is to provide a process and a device for regulating fan motors in which the operations performed by construction or work machines can be increased a manner that improves performance without causing a loss of power in the area of the engine.
This goal is achieved through a procedure for regulating fan motors on engines in construction and/or work machines, particularly those that have several independent cooling circuits, where the power of the fan motor is set to zero during certain operations performed by the construction and/or work machine and the power is used to perfonm these operations.
Beneficial extensions of the invention can be inferred from the associated process-related subclaims.
This goal is also achieved through a device for regulating the fan motor of intenxal combustion engines in construction and/or work machines, particularly those with several independent cooling circuits, with at least one Pl-regulator per cooling circuit, at least one post-installed comparator and at least one pulse width modulator operating with a setting device.
In another version of the invention, the regulator is a p-controller-Pl-regulator.
The subject of the invention makes it possible to set to at least two different desired temperatures of a fan motor in several independently operating cooling circuits of an internal combustion engine by means of a common setting device, where the power of the fan motor while performing certain operations is zero (the fan idles) and the fan power can then be used to perform these operations.
With one p,-controller-Pl-regulator per cooling circuit, the desired and actual values are compared and the required setting for each cooling circuit is determined. The post-installed comparator determines the maximum setting from the individual settings and sends this to a PWM (pulse width modulation) stage, which is connected to the setting device.
When particular operations are performed, for example raising the boom of a hydraulic excavator, the desired temperatures of the cooling circuits are essentially raised at the same time.
Thus, the power of the fan motor is set to zero (the fan idles) and the lifting power increases by the amount required to run the fan.
Depending on the size of the construction or work machine, particularly in the case of large hydraulic excavators, lifting power when raising a boom can be increased without causing overheating of the drive unit. This is because the fan motor power is not needed all the time, but only during predetermined operations of the construction or work machines.
The sole figure shows a basic sketch and is described as follows:
There is an internal combustion engine (1) which, in this example, has two independent cooling circuits (2 and 3), that are connected by means of a controller (9) to a setting device (10) on an adjustable fan motor (4) with a fan wheel (5). There is also a device (6), for example the boom of a hydraulic excavator, which is not shown, which is mounted on an upper chassis (7), which is only outlined, and can be raised and lowered by means of hydraulic cylinder (8). Hydraulic circuit (11), which is used to raise and lower device (6), hydraulic circuit (12) for fan motor (4) and hydraulic circuit (20), which is needed to feed setting device (10), are shown. Each cooling circuit (2 and 3) has a p-controller-Pl-regulator that compares the desired and actual values and calculates the appropriate setting for each cooling circuit (2 and 3). The desired values are provided to the p-controller-Pl-regulators ( 13 and 14) by a change-over switch ( 15). The values provided by the p,-controller-Pl-regulators ( 13 and 14) are fed to a post-installed comparator ( 16), which determines the maximum setting from the individual settings and passes it on to a PWM (pulse width modulation) step 17, which is connected to setting device (10) by means of wire ( 18). Part of the power of engine ( 1 ) is used to operate device (6), while another part of the power is required for fan wheel (5) to protect engine ( 1 ) from overheating.
For certain operations, for example raising device (6) using hydraulic cylinder (8), it can happen that engine ( 1 ) is not quite able to raise device (6).
With this invention, for such operations, the desired temperatures of cooling circuits (2 and 3) are raised to higher temperatures by means of a switch ( 19) and a change-over switch ( 15).
Thus, the power of fan motor (4) is set to zero by means of wire (18) and setting device (10).
Fan wheel (S) slows down or idles. The hydraulic power of fan motor (4), which is now no longer needed to power fan wheel (5), is thus added to the lifting power of device 6 without causing engine (1) to overheat. As soon as the certain operation is completed, hydraulic fan motor (4) is again connected to fan wheel (S), thus the higher desired temperature for each of cooling circuits (2 and 3) is again assigned a lower desired temperature by means of switch (19) and change-over switch (15). This process can be repeated in any sequence, which ultimately depends on the maximum performance assigned to specific operations.

Claims (8)

Claims
1. A process for regulating the fan motor (4) of internal combustion engines (1) in construction and/or work machines, particularly those with several independent cooling circuits (2 and 3), where the power of fan motor (4) is set to null for certain operations performed by construction and/or work machines and this power is used to perform these operations.
2. A process in accordance with claim 1, characterized in that cooling circuit (2 and 3) is set to at least two different desired temperature values, whereby for certain operations performed by construction or work machines, one desired temperature is set to a higher desired temperature by means of a switch (19) and a change-over switch (15) and the power of the fan motor (4) is set to null.
3. A process in accordance with claim 1 or 2, characterized in that when there are several cooling circuits (2 and 3) present, each cooling circuit (2 and 3) is set to at least two different desired temperatures by means of a common setting device (10).
4. A process in accordance with claims 1 to 3, characterized in that the desired and actual temperatures are compared by one µ-controller-P1-regulator (13 and 14) per cooling circuit (2 and 3) and the permissible setting for each cooling circuit (2 and 3) is determined.
5. A process in accordance with claims 1 to 4, characterized in that a comparator (16) operating with P1-controller(s) (13 and 14) determines a maximum setting from the individual setting(s) and passes this on to a pulse width modulation stage (17) operationally connected to a setting device (10).
6. A process in accordance with claims 1 to 5, characterized in that, for certain construction and/or work machine operations, particularly raising the boom (6) of a hydraulic excavator, the desired temperatures of all the cooling circuits (2 and 3) are essentially raised at the same time, whereby the power of fan motor (4), particularly when fan wheel (5) is idling, is set to null and the driving power of fan motor (4) is transferred to the operation of the construction and/or work machine, particularly the lifting capacity of boom (6), thus increasing this capacity.
7. A device for regulating the fan motor (4) of internal combustion engines (1) in construction and work machines, particularly those with several independent cooling circuits (2 and 3), with at least one change-over switch (15), at least one P1-controller (13 and 14) per cooling circuit (2 and 3), at least one post-installed comparator (16) and at least one pulse width modulator (17) operationally connected to a setting device (10).
8. A device in accordance with claim (7), characterized in that the regulator (13 and 14) is a µ-controller-P1-regulator.
CA002426452A 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 Abandoned CA2426452A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10044607.8 2000-09-08
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
PCT/EP2001/010193 WO2002020955A1 (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

Publications (1)

Publication Number Publication Date
CA2426452A1 true CA2426452A1 (en) 2003-04-24

Family

ID=7655616

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002426452A Abandoned 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

Country Status (7)

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

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JP2005344766A (en) * 2004-06-01 2005-12-15 Komatsu Ltd Oil-hydraulic circuit of work vehicle
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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 (en) * 2015-12-21 2017-06-22 Robert Bosch Gmbh Method and control device for operating a coupled to a shaft of a fan flywheel
US10330126B2 (en) * 2016-12-16 2019-06-25 Caterpillar Inc. Fan control system with electro-hydraulic valve providing three fan motor operational positions
CN111356808B (en) * 2017-11-23 2022-03-22 沃尔沃建筑设备公司 Drive system for a construction machine and method for controlling the drive system
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 (en) 2020-04-21 2021-10-21 Liebherr-Werk Telfs Gmbh bulldozer

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FR2176282A5 (en) * 1972-03-17 1973-10-26 Peugeot & Renault
JPS6126585Y2 (en) * 1980-12-25 1986-08-09
DE19535674A1 (en) 1995-09-26 1997-03-27 Orenstein & Koppel Ag Process for controlling the cooling device of a diesel engine excavator drive and cooling device for diesel engine excavator drives
EP0946384A1 (en) * 1996-12-24 1999-10-06 Itt Automotive Electrical Systems, Inc. Hydraulically powered fan and power steering in a vehicle
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

Also Published As

Publication number Publication date
JP2004508480A (en) 2004-03-18
AU2002213877A1 (en) 2002-03-22
US20040003782A1 (en) 2004-01-08
DE10044607A1 (en) 2002-04-04
EP1315888A1 (en) 2003-06-04
WO2002020955A1 (en) 2002-03-14

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