EP2539562B1 - Pump group for a cooling circuit, in particular for motorbike - Google Patents

Pump group for a cooling circuit, in particular for motorbike Download PDF

Info

Publication number
EP2539562B1
EP2539562B1 EP11711661.6A EP11711661A EP2539562B1 EP 2539562 B1 EP2539562 B1 EP 2539562B1 EP 11711661 A EP11711661 A EP 11711661A EP 2539562 B1 EP2539562 B1 EP 2539562B1
Authority
EP
European Patent Office
Prior art keywords
duct
pump group
liquid
pressure chamber
maximum
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.)
Active
Application number
EP11711661.6A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2539562A1 (en
Inventor
Fabio Saottini
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.)
Industrie Saleri Italo SpA
Original Assignee
Industrie Saleri Italo SpA
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 Industrie Saleri Italo SpA filed Critical Industrie Saleri Italo SpA
Publication of EP2539562A1 publication Critical patent/EP2539562A1/en
Application granted granted Critical
Publication of EP2539562B1 publication Critical patent/EP2539562B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/161—Controlling of coolant flow the coolant being liquid by thermostatic control by bypassing pumps
    • 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
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P2007/146—Controlling of coolant flow the coolant being liquid using valves

Definitions

  • the present invention relates to a pump group for a cooling circuit, in particular for a motorbike.
  • a pump group for cooling circuit is shown in US 6 712 028 B1 .
  • the pump of a cooling circuit is connected upstream to an aspiration duct, from which it aspirates the cooling liquid, and downstream to a delivery duct, towards which the pressurised liquid is sent.
  • the pump works by means of a rotor, mechanically connected to the crank shaft to be placed in rotation.
  • the purpose of the present invention is to make a pump group which overcomes the drawbacks spoken of
  • a cooling system of a vehicle such as a motor cycle or motor vehicle is connected to a thermal engine to cool it and comprises a radiator, for the cooling of the cooling liquid, a pump group 1, for the forced circulation of the cooling liquid, and a cooling circuit, which connects the pump group to the radiator and to the thermal engine.
  • the pump group 1 comprises an exit duct 2 for the supply of pressurised liquid downstream, for example to the thermal motor, and an entry duct 4, for the entrance of the liquid upstream, for example coming from the radiator.
  • the pump group 1 comprises a pump 6 fitted with a rotor 8.
  • the rotor 8 is connected by means of a shaft 10 to the crank shaft, so as to be placed in rotation by such.
  • the pump 6 further comprises a pump body 12, usually made in two half-bodies, provided with a pressure chamber 14 on the inside, which the rotor 8 is housed in.
  • the pressure chamber 14 is connected upstream with the entry duct 4 for the aspiration of the cooling liquid.
  • the pump body 12 further comprises a delivery duct 16, connected downstream of the pressure chamber 14, for the delivery of the pressurised liquid; the delivery duct 16 is, in addition, connectable to the exit duct 2, to deliver the liquid to the thermal motor.
  • the pump group 1 further comprises a by-pass duct 20, which extends from a position downstream of the pressure chamber 14 and upstream of the exit duct 2 to a position upstream of the pressure chamber 14.
  • the pump group 1 further comprises an obturator device 30, positioned at the fork between the exit duct 2 and the by-pass duct 20, suitable to reduce entirely or in part the liquid coming from the delivery duct 16 towards the exit duct 2 or towards the by-pass duct 20.
  • the obturator device 30 is sensitive to the effect of the liquid coming from the delivery duct 16 and is able to further narrow the passage towards the exit duct 2 when the pressure of said liquid increases.
  • the obturator device 30 is sensitive to the pressure of the liquid coming from the delivery duct 16 so as to deviate a greater quantity coming from the delivery duct 16 towards the by-pass duct 20 as the pressure of said liquid increases.
  • the obturator device 30 is sensitive to the pressure of the liquid coming from the delivery duct 16 and is able to free the passage towards the exit duct 2 further as the pressure of said liquid decreases.
  • the obturator device 30 is sensitive to the pressure of the liquid coming from the delivery duct 16 so as to deviate a lesser quantity of liquid coming from the delivery duct 16 towards the by-pass duct 20 as the pressure of said liquid decreases.
  • the speed of rotation of the rotor is proportional to the revs of the motor and as the number of revs of the motor increases, the speed of rotation of the rotor increases, increasing the effect of the liquid on the obturator device.
  • the passage from the delivery duct towards the exit duct is reduced further, reducing the pressure of the liquid towards the motor and the other parts downstream.
  • the obturator device 30 is suitable for passing from a configuration of maximum aperture, wherein the passage toward the exit duct 2 is at its maximum, to a configuration of maximum closure, wherein the passage towards the exit duct 2 is obstructed.
  • the obturator device 30 is, moreover, normally open towards the exit duct 2, in the sense that in the absence of pressure of the liquid coming from the delivery duct, or at relatively low pressures, the passage towards the exit duct 2 is in the position of maximum aperture.
  • the obturator device is constantly influenced by a return mechanism towards the position of maximum aperture of the exit duct 2.
  • the obturator device 30 comprises an obturator paddle 32, hinged near the fork between the exit duct 2 and the by-pass duct 20, around a rotation axis Z.
  • the end of the paddle 32 opposite the hinged end projects from the by-pass duct 20, so as to be struck by the liquid coming from the delivery duct, thus being subjected to an effect facilitating rotation.
  • the paddle 32 has a front side 34, which in the position of maximum closure faces the delivery duct 16, and an opposite rear side 36 which in the position of maximum closure faces the exit duct.
  • the front side 34 has a concave surface, suitable to facilitate the action of the liquid on said paddle, to facilitate rotation from the position of maximum aperture.
  • the obturator devoice 30 comprises elastic return means, connected to the paddle to influence it constantly towards the position of maximum aperture.
  • said return means comprise a spring 40, connected to a paddle shaft 42, which extends along the rotation axis Z.
  • the paddle shaft 42 projects outside the chamber housing the paddle 32, to engage with the spring 40, also positioned outside said chamber.
  • the system formed of the paddle and the spring is self-regulating inasmuch as influenced in aperture or closure solely by the action of the liquid.
  • the obturator device 30 is fluid-controlled inasmuch as influenced in aperture by the liquid.
  • the pump group 1 comprises an obturator assembly 50, composed of an obturator body 52 comprising a supply duct 54 for connection to the delivery chamber 16 of the pump 1, said exit duct 2 and a section 20' of by-pass duct 20, said paddle 32 and said elastic return means.
  • the obturator body 52 comprises a chamber 56, in which the paddle 32 is housed.
  • the obturator assembly 50 is separable from the delivery chamber and from the remaining section 20 " of the by-pass duct, as well as from the downstream circuit connecting it to the thermal motor.
  • the pump group according to the present invention makes it possible to reduce the pressure in the cooling circuit at high revs of the motor, automatically adjusting itself as the revs of the motor decrease.
  • the pump group according to the invention does not require a separate actuator, for example hydraulic or pneumatic, to adjust the aperture or closure of the obturator device.
  • a separate actuator for example hydraulic or pneumatic
  • the obturator device is self-regulating inasmuch as influenced in aperture by the cooling liquid alone, the response of the device to pressure variations of the liquid is immediate.
  • Such advantage is particularly effective in the motor vehicle, notoriously subject to sudden variations in the number of revs of the motor.
  • the obturator assembly can be made separately from the pump and mounted at a later date, as needed.
  • the pump is of the electric type, that is to say activated by an electric motor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP11711661.6A 2010-02-22 2011-02-21 Pump group for a cooling circuit, in particular for motorbike Active EP2539562B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000036A ITBS20100036A1 (it) 2010-02-22 2010-02-22 Gruppo pompa per circuito di raffreddamento, in particolare per un motociclo
PCT/IB2011/050702 WO2011101820A1 (en) 2010-02-22 2011-02-21 Pump group for a cooling circuit, in particular for motorbike

Publications (2)

Publication Number Publication Date
EP2539562A1 EP2539562A1 (en) 2013-01-02
EP2539562B1 true EP2539562B1 (en) 2014-12-31

Family

ID=42946616

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11711661.6A Active EP2539562B1 (en) 2010-02-22 2011-02-21 Pump group for a cooling circuit, in particular for motorbike

Country Status (3)

Country Link
EP (1) EP2539562B1 (it)
IT (1) ITBS20100036A1 (it)
WO (1) WO2011101820A1 (it)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6291786B2 (ja) * 2013-10-23 2018-03-14 スズキ株式会社 自動二輪車

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1291190B1 (it) * 1997-03-13 1998-12-29 Gate Spa Sistema di raffreddamento per un motore a combustione interna, particolarmente per autoveicoli
DE10155337B4 (de) * 2001-11-10 2012-11-29 Daimler Ag Kühlkreislauf
US6712028B1 (en) * 2003-03-26 2004-03-30 General Motors Corporation Engine cooling system with water pump recirculation bypass control
DE112006000232T5 (de) * 2005-01-18 2007-11-29 Cooper-Standard Automotive Inc., Novi Drosselklappenventildichtung und Bypassabschaltung

Also Published As

Publication number Publication date
EP2539562A1 (en) 2013-01-02
WO2011101820A1 (en) 2011-08-25
ITBS20100036A1 (it) 2011-08-23

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