WO2009102263A1 - Appareil d’entraînement d’un ventilateur - Google Patents

Appareil d’entraînement d’un ventilateur Download PDF

Info

Publication number
WO2009102263A1
WO2009102263A1 PCT/SE2009/050075 SE2009050075W WO2009102263A1 WO 2009102263 A1 WO2009102263 A1 WO 2009102263A1 SE 2009050075 W SE2009050075 W SE 2009050075W WO 2009102263 A1 WO2009102263 A1 WO 2009102263A1
Authority
WO
WIPO (PCT)
Prior art keywords
fan
gear
engine
gear ratio
driving
Prior art date
Application number
PCT/SE2009/050075
Other languages
English (en)
Inventor
Lars-Olov STRANDÅS
Original Assignee
Scania Cv Ab (Publ)
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 Scania Cv Ab (Publ) filed Critical Scania Cv Ab (Publ)
Publication of WO2009102263A1 publication Critical patent/WO2009102263A1/fr

Links

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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H41/00—Rotary fluid gearing of the hydrokinetic type
    • F16H41/04—Combined pump-turbine units

Definitions

  • the invention relates to a device for driving a cooling fan of a combustion engine, comprising a gear between the cooling fan and a drive shaft of the engine.
  • Engines e.g. engines of vehicles, usually have the cooling fan connected directly to the engine's crankshaft, in which case it runs at the same speed as the engine. With a view to reducing fuel consumption, it is desirable that the engine be run at relatively low speed. In state of the art engines, this entails the speed of the fan having to be geared up to achieve sufficient air flow for satisfactory cooling. To this end, a belt drive is often used to impart to the fan a higher speed than the engine, so that the fan has sufficient capacity at low engine speeds. At high speeds, however, the fan will then require more energy from the engine, which is disadvantageous for the engine's fuel consumption. A quickly rotating fan also generates disturbing noise and shortens the service life of the belts.
  • a belt drive has the further disadvantage that belts, guide pulleys and tensioning pulleys hinder the fan's cooling air flow through the engine space.
  • a belt-driven fan may certainly be run intermittently to achieve a desired average fan capacity, but only by a low gear ratio can it be protected against too high powers.
  • a known practice from, for example, DE1101051 is to arrange between the belt drive and the fan a hydraulic connection which provides automatic slippage when the load on the fan rises.
  • An object of the invention is to further develop the state of the art and propose a compact device of the kind indicated in the introduction which does not hinder the fan's cooling flow and makes it possible to run the fan in a desired speed range according to the load.
  • the drive is a hydrodynamic gear of the type which comprises fixed guide vanes and is adapted to responding to a lower engine speed at a lower load on the fan by providing a step-up gear ratio between the drive shaft and the fan and to responding to a higher engine speed at a higher load on the fan by applying slippage to reduce the gear ratio between the drive shaft and the fan.
  • the whole drive device makes it possible for the whole drive device to be arranged in a small amount of space entirely behind the fan without disturbing the cooling air flow. It also makes it possible for the fan to be run at sufficient rotation speed to provide good cooling power even at low engine speed. At higher load on the fan, the device advantageously reduces the gear ratio by applying slippage. Although the efficiency of the device is thereby diminished, a fuel saving is still achieved as compared with a belt-driven fan.
  • the device's gear ratio step-up between the drive shaft and the fan may in an embodiment be about 1.4:1 at a specified low speed and a specified low load.
  • the device may also be connected to an adjustable hydraulic source in order to vary a fullness coefficient of the gear.
  • the gear ratio of the gear can thus be varied as necessary.
  • FIG. 1 depicts a schematic sideview, partly in section and with portions cut away, of a vehicle engine with a fan and a fan drive device according to the invention.
  • FIG. 1 depicts a forward end of a vehicle engine (combustion engine) 10 with a protruding end 14 of a shaft driving the engine, e.g. the crankshaft 12 of the engine 10.
  • the crankshaft end 14 is connected via a fixed connection 16 to a fan 60 via a hydraulic gear 30.
  • the hydraulic gear 30 is of a hydrodynamic type and comprises in a conventional manner a stationary housing 32 with fixed guide vanes 34.
  • the housing 32 is firmly connected to the forward side of the engine 10 by a retainer 20 which is coaxial to the crankshaft 12.
  • the retainer 20 is provided with a radial annular flange 22 which is connected to the forward side of the engine 10 and an annular flange 24 which is coaxial to the crankshaft 12 and which surrounds and is firmly connected to the outside of the stationary housing 32.
  • the hydraulic gear 30 is also of the type at which, at low load, i.e. low fan speed, provides a gear ratio step-up between the input shaft 36 and the output shaft 42.
  • a gradually increasing load causes slippage of the turbine wheel 44 in the housing by internal friction of the hydraulic fluid, resulting in a gradually decreasing gear ratio between the input shaft 36 and the output shaft 42.
  • the gear 30 is engaged and disengaged respectively and has its speed regulated by the supply and removal of hydraulic fluid via a line 48 from a schematically depicted hydraulic source 50, comprising in the example a double- acting pump 52 driven by a motor 54.
  • the speed of the fan 60 can therefore be controlled as necessary by the fullness with hydraulic fluid of the housing 32.
  • the hydraulic source 50 may be controlled by, for example, an undepicted engine temperature sensor via a control unit 56.
  • the maximum gear step-up ratio of the gear 30 may typically be about 1.4:1.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Control Of Positive-Displacement Air Blowers (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • General Details Of Gearings (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L’invention concerne un dispositif servant à entraîner un ventilateur (60) de moteur à combustion (10), comprenant un engrenage situé entre le ventilateur et un arbre d'entraînement (12) de moteur. L'engrenage est un engrenage hydrodynamique (30) du type qui comprend des aubes de guidage fixes (34), et est conçu pour répondre à une faible vitesse de moteur à une charge inférieure sur le ventilateur par fourniture d'un rapport de vitesse multiplicateur entre l'arbre d'entraînement (12) et le ventilateur (60), et à une vitesse de moteur élevée à une charge supérieure sur le ventilateur par application d'un patinage afin de réduire le rapport de vitesse entre l'arbre d'entraînement et le ventilateur.
PCT/SE2009/050075 2008-02-12 2009-01-26 Appareil d’entraînement d’un ventilateur WO2009102263A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0800310-5 2008-02-12
SE0800310A SE532025C2 (sv) 2008-02-12 2008-02-12 Anordning för drivning av en kylfläkt

Publications (1)

Publication Number Publication Date
WO2009102263A1 true WO2009102263A1 (fr) 2009-08-20

Family

ID=40957172

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2009/050075 WO2009102263A1 (fr) 2008-02-12 2009-01-26 Appareil d’entraînement d’un ventilateur

Country Status (2)

Country Link
SE (1) SE532025C2 (fr)
WO (1) WO2009102263A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101892893A (zh) * 2010-07-02 2010-11-24 辽宁工程技术大学 工程机械发动机节能冷却风机
DE102013003754A1 (de) * 2013-03-06 2014-09-11 Voith Patent Gmbh Kühlsystem, insbesondere für ein Kraftfahrzeug

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1101051B (de) * 1956-09-08 1961-03-02 Daimler Benz Ag Einrichtung zum Anpassen der Kuehlluftlieferung an den jeweiligen Bedarf einer Brennkraftmaschine, insbesondere bei Kraftfahrzeugen
CA1186591A (fr) * 1982-09-01 1985-05-07 Paul J. Slezak Transmission hydrodynamique
US20070006826A1 (en) * 2003-04-04 2007-01-11 Voith Turbo Gmbh & Co Propulsion system and method for optimising power supply to the cooling system thereof
DE102006028776A1 (de) * 2006-06-23 2007-12-27 Daimlerchrysler Ag Hydrodynamischer Drehmomentwandler für ein Kraftfahrzeug

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1101051B (de) * 1956-09-08 1961-03-02 Daimler Benz Ag Einrichtung zum Anpassen der Kuehlluftlieferung an den jeweiligen Bedarf einer Brennkraftmaschine, insbesondere bei Kraftfahrzeugen
CA1186591A (fr) * 1982-09-01 1985-05-07 Paul J. Slezak Transmission hydrodynamique
US20070006826A1 (en) * 2003-04-04 2007-01-11 Voith Turbo Gmbh & Co Propulsion system and method for optimising power supply to the cooling system thereof
DE102006028776A1 (de) * 2006-06-23 2007-12-27 Daimlerchrysler Ag Hydrodynamischer Drehmomentwandler für ein Kraftfahrzeug

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101892893A (zh) * 2010-07-02 2010-11-24 辽宁工程技术大学 工程机械发动机节能冷却风机
DE102013003754A1 (de) * 2013-03-06 2014-09-11 Voith Patent Gmbh Kühlsystem, insbesondere für ein Kraftfahrzeug
DE102013003754B4 (de) 2013-03-06 2020-06-18 Voith Patent Gmbh Kühlsystem eingerichtet zur Kühlung eines Verbrennungsmotors

Also Published As

Publication number Publication date
SE532025C2 (sv) 2009-10-06
SE0800310L (sv) 2009-08-13

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