EP2539562A1 - Pump group for a cooling circuit, in particular for motorbike - Google Patents
Pump group for a cooling circuit, in particular for motorbikeInfo
- Publication number
- EP2539562A1 EP2539562A1 EP11711661A EP11711661A EP2539562A1 EP 2539562 A1 EP2539562 A1 EP 2539562A1 EP 11711661 A EP11711661 A EP 11711661A EP 11711661 A EP11711661 A EP 11711661A EP 2539562 A1 EP2539562 A1 EP 2539562A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- duct
- pump group
- liquid
- group according
- pressure chamber
- 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.)
- Granted
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 30
- 230000000694 effects Effects 0.000 claims abstract description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 8
- 239000000110 cooling liquid Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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.
- 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
- FIG. 1 shows a view partially in cross-section of a pump group according to the present invention, according to one embodiment
- figure 2 shows an obturator assembly of the pump group in figure 1;
- figure 3 shows a cross-section of the obturator assembly in figure 2.
- 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 r 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 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 ⁇ 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)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000036A ITBS20100036A1 (en) | 2010-02-22 | 2010-02-22 | PUMP UNIT FOR COOLING CIRCUIT, IN PARTICULAR FOR A MOTORCYCLE |
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 true EP2539562A1 (en) | 2013-01-02 |
EP2539562B1 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 (en) |
IT (1) | ITBS20100036A1 (en) |
WO (1) | WO2011101820A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6291786B2 (en) * | 2013-10-23 | 2018-03-14 | スズキ株式会社 | Motorcycle |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1291190B1 (en) * | 1997-03-13 | 1998-12-29 | Gate Spa | Cooling system for an internal combustion engine, particularly for motor vehicles |
DE10155337B4 (en) * | 2001-11-10 | 2012-11-29 | Daimler Ag | Cooling circuit |
US6712028B1 (en) * | 2003-03-26 | 2004-03-30 | General Motors Corporation | Engine cooling system with water pump recirculation bypass control |
DE112006000232T5 (en) * | 2005-01-18 | 2007-11-29 | Cooper-Standard Automotive Inc., Novi | Throttle valve seal and bypass shut-off |
-
2010
- 2010-02-22 IT IT000036A patent/ITBS20100036A1/en unknown
-
2011
- 2011-02-21 WO PCT/IB2011/050702 patent/WO2011101820A1/en active Application Filing
- 2011-02-21 EP EP11711661.6A patent/EP2539562B1/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2011101820A1 * |
Also Published As
Publication number | Publication date |
---|---|
ITBS20100036A1 (en) | 2011-08-23 |
WO2011101820A1 (en) | 2011-08-25 |
EP2539562B1 (en) | 2014-12-31 |
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