EP1696112B1 - Verfahren und Einrichtung zum Steueren der Drehrichtungsumkehr eines hydraulischen Motors - Google Patents

Verfahren und Einrichtung zum Steueren der Drehrichtungsumkehr eines hydraulischen Motors Download PDF

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Publication number
EP1696112B1
EP1696112B1 EP06290305.9A EP06290305A EP1696112B1 EP 1696112 B1 EP1696112 B1 EP 1696112B1 EP 06290305 A EP06290305 A EP 06290305A EP 1696112 B1 EP1696112 B1 EP 1696112B1
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EP
European Patent Office
Prior art keywords
speed
rotation
unclogging
hydraulic motor
motor
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EP06290305.9A
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English (en)
French (fr)
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EP1696112A1 (de
Inventor
Patrick Gourlaouen
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JTEKT HPI SAS
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JTEKT HPI SAS
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    • 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
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • F01P5/04—Pump-driving arrangements
    • F01P5/043—Pump reversing arrangements
    • 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
    • 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

Definitions

  • the invention relates to a method for controlling the reversal of the direction of rotation of a hydraulic motor, in particular for rotating a cooling fan of a radiator associated with a combustion engine of a motor vehicle, and a system for implementing this method.
  • the object of the invention is to propose a method for controlling the reversal of the direction of rotation of a hydraulic motor, which overcomes the disadvantages just stated.
  • the method according to the invention is characterized in that the reversal of the direction of rotation is controlled so that it goes through a step of a predetermined duration of rotation of the motor at its minimum drag speed.
  • the method is characterized in that the low intermediate speed is the minimum drag speed of the hydraulic motor.
  • the method is characterized in that the hydraulic motor is associated with speed sensor and provides a control loop on the speed of rotation of the motor to operate it at its minimum drag speed.
  • the method is characterized in that to control a reversal of the direction of rotation of the hydraulic motor driving a fan propeller generating a cooling air flow of a radiator, to unclog this, by causing the motor to reduce its rotation speed firstly to its minimum drag speed for a predetermined time and then from this minimum speed to the maximum declogging speed, in the reverse direction of rotation.
  • the method is characterized in that the declogging rotation speed in the opposite direction is maintained for a predetermined period of time before reversing the speed of rotation of the unclogging speed. at the maximum speed in the opposite direction of cooling passing through the minimum drag speed maintained for a predetermined period of time allowing the deposition of dust discharged during unclogging.
  • the method is characterized in that unclogging phases are performed at predetermined regularly advantageous periods, and take place automatically.
  • the method is characterized in that a declogging phase can be deliberately initiated, in particular manually, by an operator in a temperature zone controlled by cooling, when a parameterizable temperature threshold is exceeded for a predetermined time.
  • the method is characterized in that the operator is notified of such an anomaly by an alarm signal such as a visual or sound signal.
  • the method is characterized in that, after the launching of an unclogging phase by an operator, the declogging proceeds automatically.
  • the method is characterized in that if during an automatic declogging phase, triggered by an operator, the regulated temperature exceeds a predetermined critical temperature threshold, the rotational speed of the hydraulic motor is brought automatically at the maximum cooling rate.
  • the method is characterized in that the function of a voluntary launching of a declogging step is prohibited when the regulated temperature exceeds a predetermined critical value.
  • the method is characterized in that a declogging phase is provided at the start of the hydraulic motor.
  • the method is characterized in that prior to unclogging a phase is provided for verifying the correct operation of the temperature sensors at the maximum speed in the direction of rotation of the cooling motor before proceeding. the reversal of the direction of rotation of the motor for unclogging.
  • the implementation system of the method according to the invention is characterized in that it comprises a device for reversing the rotational speed of the hydraulic motor, which comprises a sensor of the rotational speed of the engine included in a control loop. regulation of this speed and a regulated electronic temperature control card, programmed to control the inversions of the direction of rotation of the hydraulic motor related to unclogging phases, with establishment of the minimum speed V min of intermediate drag maintained for a period of time predetermined time.
  • a motor 1 is supplied with pressurized liquid by a hydraulic circuit comprising a pump 2 for sending the liquid under pressure to the engine 1 via a solenoid valve 3 of the 4/2 type and a proportionally controlled pressure limiter 4 or any proportional control device, advantageously also a solenoid valve.
  • a solenoid valve 3 of the 4/2 type and a proportionally controlled pressure limiter 4 or any proportional control device, advantageously also a solenoid valve.
  • a solenoid valve 3 of the 4/2 type
  • a proportionally controlled pressure limiter 4 or any proportional control device advantageously also a solenoid valve.
  • the reservoir of the hydraulic circuit is indicated the reservoir of the hydraulic circuit. This part of the control system being known per se, it is not necessary to write it in more detail.
  • the motor 1 rotates a fan 6 for cooling a heat engine (Not shown) via a radiator 7.
  • the motor 1 and the valve 4/2 for reversing the direction of rotation of the motor 1 and the proportional control valve 4 are controlled by a card 8.
  • the latter establishes, using a micro-processor, the function of significant temperature parameters of the operation of the vehicle equipped with the control system, such as engine oil temperatures, air turbocharger, hydraulic oil and gearbox oil, the control signals to be sent to the excitation coils of the inverting valves 3 and proportional control 4, illustrated by the arrow lines 9 and 10
  • the inputs of the temperature parameters are indicated by the arrows 11.
  • the system according to the invention comprises a sensor of the speed of rotation of the engine 1 which could be associated or integrated with the latter.
  • This sensor is designated by the reference 12 and sends the information relating to the speed of rotation to an appropriate input of the electronic card 8, by a link indicated at 13.
  • the servo-control loop on the speed of rotation of the hydraulic motor, and created, provides control of the effective rotation speed of the fan allowing operation at the lowest speed permitted by the hydraulic motor technology, called minimum drag speed, that is to say the low limit of rotation before calibration hydraulic motor.
  • the system which has just been described ensures a cooling of the radiator 7 by the passage through this radiator of a cooling air flow produced by the fan 4 rotated by the hydraulic motor 1.
  • the cooling is carried out in the purpose of regulating in an appropriate manner, determined by the electronic card 8 according to a pre-established program, the thermal conditions of the engine.
  • regulated temperatures we will talk about regulated temperatures.
  • the figure 2 shows on the ordinate axis the rotational speed V of the hydraulic motor 1 which in the cooling operating mode V ref varies between the speed V max and the speed V min under the control of the electronic card 8, the speed V min being the minimum speed before setting the hydraulic motor.
  • the unclogging mode is characterized by the speed -V max and the speed -V min .
  • the abscissa axis indicates the time t.
  • the hydraulic motor 1 rotates at a cooling rate V ref which is determined by the electronic card 8 so that the fan 6 can send the radiator 7 cooling air flow to maintain the temperature of the heat engine to the appropriate value according to the operating program of the electronic card.
  • the pilot program provides for the execution of a declogging phase by reversing the direction of rotation of the hydraulic motor 1.
  • the electronic card 8 controls first the reducing the speed of rotation of the value V r to the minimum rotation value V min and maintains the speed at this value for a predetermined period of time ⁇ t vmin . This value is chosen so as to be sure of the establishment of the speed V min .
  • the electronic card 8 controls the reversal of the direction of rotation of the motor from the low speed V min to the maximum speed -V max in the opposite direction and remains at this value for a time period ⁇ t dec predetermined, necessary to ensure the unclogging of the radiator 7.
  • the unclogging phase ends and the electronic card 8 controls the reversal process of the sense of rotation of the motor 1 by first bringing the speed of the value -V max to the minimum value -V min and, after a time duration ⁇ t dep predetermined allowing the dust discharged from the radiator to be deposited, the low speed -V min at the maximum speed V max in the opposite direction of rotation at time t5.
  • the speed of rotation now in the cooling direction is reduced at time t6 to the value V ref which corresponds to the value indicated in the operating program of the electronic card for the parameters relating to the operation. of the engine.
  • the method according to the invention allows a reversal of the direction of rotation of the hydraulic motor 1 smoothly, compared to the state of the technical, because the inversion is not abruptly, directly, between the regulated speed of operation in cooling mode V ref at the maximum speed V max in the opposite direction, but passing through a bearing at which the engine runs at the minimum drag speed V min of the direction of rotation of the inversion trigger.
  • the automatic unclogging takes place in the manner described above only if the cooling demand is in a controlled temperature range between T2 and T3 of the table below which is the automatic unclogging area. If during this automatic declogging phase, the temperature to be monitored exceeds the critical threshold T4 of the very high temperature alarm zone, then there is a return to the speed V max in the cooling direction.
  • the driver of the vehicle can manually trigger unclogging by reversing the direction of rotation if between two unclogging phases in the controlled temperature zone T2-T3 by the cooling, the temperature exceeds a parameterizable temperature threshold T3 for a period of time which can also be parameterized, for example by one minute.
  • a visual or audible alarm then informs the driver of the anomaly and the latter, on his own initiative, can then act via a control member such as a push button, to launch the unclogging sequence which, once launched , will proceed in the automatic manner described above.
  • the declogging phase has been described as an intermediate phase interrupting the cooling process.
  • the invention also advantageously provides unclogging at each start of the hydraulic motor.
  • the electronic card is programmed to start the engine in the cooling direction to its maximum speed V max from the zero speed as indicated at time t7 on the figure 2 following the arrow up to the speed V max , to maintain this speed V max for a predetermined period of time of a few seconds to control each of the four sensors and to check if it is not in a forbidden temperature state.
  • the electronic card After this preliminary control phase at the maximum speed V max , the electronic card will order the execution of the unclogging from this speed V max with reversal of the direction of rotation, on the figure 2 at the moment of time t8 according to the process illustrated in this figure whose beginning, before joining the continuous line, is illustrated in broken lines.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Claims (14)

  1. Verfahren zum Steuern der Umkehr der Drehrichtung eines Hydraulikmotors (1), gegebenenfalls des Drehantriebs eines Lüfters (6) zur Kühlung eines einem Verbrennungsmotor eines Kraftfahrzeugs zugeordneten Kühlers (7), dadurch gekennzeichnet, dass die Umkehr der Drehrichtung des Hydraulikmotors (1) derart gesteuert wird, dass die Geschwindigkeit über einen Schritt einer vorbestimmten niedrigen Übergangs-Drehgeschwindigkeit einer vorbestimmten Dauer erfolgt.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die niedrige Übergangsgeschwindigkeit die minimale Widerstandsgeschwindigkeit (Vmin) des Hydraulikmotors (1) ist.
  3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass dem Hydraulikmotor (1) ein Sensor (12) der Drehgeschwindigkeit zugeordnet ist und ein Regelkreis für die Drehgeschwindigkeit des Motors vorgesehen ist, damit dieser mit seiner minimalen Widerstandsgeschwindigkeit (Vmin) läuft.
  4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass, um eine Umkehr der Drehrichtung des Hydraulikmotors (1) zu steuern, der eine Schraube eines Ventilators (6) antreibt, welche einen Luftstrom zum Kühlen eines Kühlers (7) erzeugt, um diesen zu reinigen, der Motor (1) veranlasst wird, seine Drehgeschwindigkeit zunächst auf seine minimale Widerstandsgeschwindigkeit (Vmin) während einer vorbestimmten Zeit (Δtvmin) zu reduzieren und danach von dieser minimalen Geschwindigkeit auf die maximale Reinigungsgeschwindigkeit (-Vmax) in der umgekehrten Drehrichtung.
  5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass die Reinigungs-Drehgeschwindigkeit in der umgekehrten Richtung (-Vmax) während einer vorbestimmten Zeitdauer (Δtdec) aufrecht erhalten wird, bevor die Drehgeschwindigkeit der Reinigungsgeschwindigkeit (-Vmax) erneut auf die maximale Geschwindigkeit (Vmax) in der umgekehrten Kühlrichtung bei Passieren über die minimale Widerstandsgeschwindigkeit (-Vmin) umgekehrt wird, die während einer vorbestimmten Zeitdauer (Δtdep) beibehalten wird, um die Ablagerung des beim Reinigen entfernten Staubs zu erlauben.
  6. Verfahren nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, dass Reinigungsphasen in vorzugsweise regelmäßigen vorbestimmten Zeiträumen durchgeführt werden und automatisch erfolgen.
  7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass eine Reinigungsphase in einem Bereich von durch die Kühlung geregelten Temperaturen von einem Bediener absichtlich, vor allem manuell, gestartet werden kann, wenn ein parametrierbarer Temperaturgrenzwert (T3) während einer vorbestimmten Zeit überschritten wird.
  8. Verfahren nach Anspruch 7, dadurch gekennzeichnet, dass der Bediener über eine derartige Anomalie mittels eines visuellen oder akustischen Alarmsignals informiert wird.
  9. Verfahren nach einem der Ansprüche 7 oder 8, dadurch gekennzeichnet, dass die Reinigung nach dem Starten einer Reinigungsphase durch einen Bediener automatisch erfolgt.
  10. Verfahren nach einem der Ansprüche 7 bis 9, dadurch gekennzeichnet, dass, wenn während einer von einem Bediener ausgelösten automatischen Reinigungsphase die regulierte Temperatur einen vorbestimmten kritischen Temperaturgrenzwert (T4) überschreitet, die Drehgeschwindigkeit des Hydraulikmotors (1) automatisch auf die maximale Kühlgeschwindigkeit Vmax geführt wird.
  11. Verfahren nach einem der Ansprüche 7 bis 10, dadurch gekennzeichnet, dass die Funktion eines absichtlichen Startens eines Reinigungsschritts verboten ist, wenn die regulierte Temperatur einen vorbestimmten kritischen Temperaturgrenzwert (T4) überschreitet.
  12. Verfahren nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass beim Starten des Hydraulikmotors eine Reinigungsphase vorgesehen ist.
  13. Verfahren nach Anspruch 12, dadurch gekennzeichnet, dass vor der Reinigung eine Überprüfungsphase des ordnungsgemäßen Betriebs der Temperatursensoren bei maximaler Geschwindigkeit (Vmax) in der Drehrichtung des Kühlens des Motors vorgesehen ist, bevor die Umkehr der Drehrichtung des Motors zwecks Reinigung erfolgt.
  14. System für die Umsetzung des Verfahrens nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, dass es eine Vorrichtung für die Umkehr der Drehgeschwindigkeit des Hydraulikmotors (1) umfasst, der einen Sensor (12) der Drehgeschwindigkeit des Motors umfasst, der sich in einem Regelkreis dieser Geschwindigkeit befindet, und eine elektronische Karte (8) zur Temperaturregelung, die programmiert ist, um die mit den Reinigungsphasen verbundenen Umkehren der Drehrichtung des Hydraulikmotors (1) mit Herstellung der minimalen Übergangs-Widerstandsdrehgeschwindigkeit (Vvmin; -Vvmin), die während einer vorbestimmten Zeitdauer (Δtvmin; Δtdep) aufrecht erhalten wird, zu steuern.
EP06290305.9A 2005-02-25 2006-02-23 Verfahren und Einrichtung zum Steueren der Drehrichtungsumkehr eines hydraulischen Motors Active EP1696112B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0501946A FR2882536B1 (fr) 2005-02-25 2005-02-25 Procede de pilotage de l'inversion du sens de rotation d'un moteur hydraulique et systeme de mise en oeuvre de ce procede

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EP1696112A1 EP1696112A1 (de) 2006-08-30
EP1696112B1 true EP1696112B1 (de) 2016-04-13

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080108032A1 (en) * 2006-11-08 2008-05-08 Clark Equipment Company Radial venting axial fan for a power machine
US8997906B2 (en) 2011-04-01 2015-04-07 Agco Corporation Air mover reversing for work vehicle cooling package
EP2694787B1 (de) * 2011-04-01 2015-07-08 Agco Corporation Nutzfahrzeug und verfahren zur steuerung kühlsysteme
JP5868663B2 (ja) * 2011-11-15 2016-02-24 日立建機株式会社 冷却ファン制御装置
EP4403757A1 (de) * 2023-01-17 2024-07-24 CNH Industrial Italia S.p.A. Kühlersteuerungssystem für ein arbeitsfahrzeug und steuerungsverfahren für ein arbeitsfahrzeug

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2788775A (en) * 1955-02-11 1957-04-16 Int Harvester Co Reversible drive for engine fans
DD129540A1 (de) * 1976-12-31 1978-01-25 Dieter Kunze Luftleiteinrichtung am motorkuehlsystem einer selbstfahrenden landmaschine
DE4216135A1 (de) * 1991-05-16 1992-11-19 Mazda Motor Steuervorrichtung fuer einen rotationskoerper zum kuehlen eines motors
JPH084528A (ja) * 1994-06-16 1996-01-09 Sumitomo Constr Mach Co Ltd 建設機械に於けるラジエータ及びオイルクーラの塵埃除去装置
US6076488A (en) * 1997-03-17 2000-06-20 Shin Caterpillar Mitsubishi Ltd. Cooling device for a construction machine
JP4204137B2 (ja) * 1999-04-22 2009-01-07 株式会社小松製作所 冷却用ファンの駆動制御装置
JP4285866B2 (ja) * 1999-12-22 2009-06-24 株式会社小松製作所 油圧駆動冷却ファン
US6750623B1 (en) * 2002-12-17 2004-06-15 Caterpillar Inc. Reversible automatic fan control system

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Publication number Publication date
FR2882536A1 (fr) 2006-09-01
FR2882536B1 (fr) 2007-08-24
EP1696112A1 (de) 2006-08-30

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