EP2614233A1 - Mechanical coolant pump - Google Patents

Mechanical coolant pump

Info

Publication number
EP2614233A1
EP2614233A1 EP10752794.7A EP10752794A EP2614233A1 EP 2614233 A1 EP2614233 A1 EP 2614233A1 EP 10752794 A EP10752794 A EP 10752794A EP 2614233 A1 EP2614233 A1 EP 2614233A1
Authority
EP
European Patent Office
Prior art keywords
pump
shaft
wheel shaft
pneumatic
clutch disk
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.)
Withdrawn
Application number
EP10752794.7A
Other languages
German (de)
French (fr)
Inventor
Jean-Michel Durand
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.)
Pierburg Pump Technology GmbH
Original Assignee
Pierburg Pump Technology GmbH
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 Pierburg Pump Technology GmbH filed Critical Pierburg Pump Technology GmbH
Publication of EP2614233A1 publication Critical patent/EP2614233A1/en
Withdrawn legal-status Critical Current

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
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • F01P5/12—Pump-driving arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/021—Units comprising pumps and their driving means containing a coupling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/04—Units comprising pumps and their driving means the pump being fluid driven
    • F04D13/043—Units comprising pumps and their driving means the pump being fluid driven the pump wheel carrying the fluid driving means
    • 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
    • F01P2070/00—Details
    • F01P2070/06—Using intake pressure as actuating fluid
    • 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
    • F01P7/162—Controlling of coolant flow the coolant being liquid by thermostatic control by cutting in and out of pumps

Definitions

  • the present invention refers to a mechanical cooiant pump for an internal combustion engine
  • a mechanica! coolant pump is a coolant pump which is driven by the combustion engine itself, for example by using a driving belt driving a pulley-wheel , of- the coolant pump.
  • the pulley-wheel is driving the rotor shaft or a pump wheel which is rotatably fixed at the rotor shaft.
  • the rotational speed of such a coolant pump is proportional to the rotational speed of the engine's crankshaft so that the coolant pump is running permanently even if no coolant flow is needed by the engine. This increases the fuel consumption of the combustion engine unnecessarily. Therefore switchable coolant pumps are used to optimize the energy consumption of the system. Especially, as long as the combustion engine is cold and no coolant flow is needed, the coolant pumps can be switched- off with the result that the combustion engine's warming-up phase is shortened, the exhaust emission decreases and the fuel consumption is reduced.
  • a mechanical cooiant pump of the prior art which is switchable is known from DE 10 2006 039 680 Al.
  • the disclosed coolant pump is provided with an internal mechanical clutch which is arranged inside the pump housing.
  • the mechanical clutch is provided by the pump wheel-sided end of the rotor shaft and the pump wheel so that the rotor shaft can be disengaged from the pump wheel, for instance, in the warming-up phase of the combustion engine.
  • the mechanical clutch of such a coolant pump is controlled by a separate external actuator which is connected to the opposite end of the rotor shaft.
  • An externa! actuator requires additional installation space in the engines compartment.
  • the mechanicai coolant pump for an internal combustion engine comprises a stationary cylindrical pump housing with an internal pneumatic actuator which is supplied by a pneumatic supply means supplying a low-pressure, i.e. a pressure below the atmospheric pressure.
  • the pump comprises a pump wheel rotatably fixed at a pump wheel shaft, whereby the pump wheel shaft is rotatably supported by the pump housing.
  • the pump wheel shaft is connectable to a separate driven shaft by an internal pneumatic clutch unit, whereby the driven shaft is directly connected with a pulley-wheel which is driven by a driving belt.
  • the internal clutch unit comprises a clutch disk which is completely fixed to the driven shaft or, aiternatively, to the pump wheel shaft, and an axiaily slidable clutch disk which is slidably arranged at the pump wheel shaft or, alternatively, at the driven shaft.
  • the slidable clutch disk is rotatab!y fixed to the pump wheel shaft or, alternatively, to the driven shaft and is axiaily actuated by the pneumatic actuator.
  • the interna! pneumatic actuator uses a low-pressure to actuate the clutch unit, more specifically, to actuate the slidable clutch disk.
  • the low- pressure is supplied by the pneumatic supply means.
  • the pneumatic supply means can be represented by the intake section of the combustion engine and a pneumatic va!ve so that the coolant pump does not need an external actuator. This minimizes the size of the switchable coolant pump so that the required installation space is minimized in comparison to a switchable coolant pump with a separate externa! actuator,
  • the pump wheel shaft or, alternatively, the driven shaft is provided with a longitudinal slide-bar at the clutch-sided end section of the shaft where the slidable clutch disk is arranged.
  • This end section can be defined by a reduced cross-section compared to the other section of the shaft.
  • the slidable clutch disk is rotatably fixed by the slide-bar and sltdably arranged at the slide-bar. The axial movement of the slidable clutch disk into the disengaged position is limited at the opposite end by a radial stopping face, for example by a circular step in the shaft.
  • the slidable clutch disk is pretensioned into the engaged position by a pretensioning element, whereby the pretensioning element is preferably a compression spring.
  • the pretension element is preferably supported by the shaft, for instance, by a spring supporting plate which is fixed to the shaft.
  • the spring supporting plate is a mechanical support of the pretensioning element.
  • the clutch can be disengaged when needed, for instance, during the warming-up phase of the engine by the pneumatic actuator which is supplied by the pneumatic supply means,
  • the pneumatic supply means comprises an intake section which is supplying the low- pressure, a pneumatic valve, and a pneumatic control unit which controls the pneumatic valve.
  • the internal pneumatic actuator is defined by the slidable clutch disk and the pump housing.
  • the clutch disk is an integral part of the pneumatic actuator,
  • the pump housing Is provided with a pneumatic opening provided axiafly between the slidab!e clutch disk and the pump wheel or, alternatively, the pulley-wheel.
  • the pneumatic opening is connected to the pneumatic supply means.
  • the slidable clutch disk can be disengaged from the fixed clutch disk by using the internal pneumatic actuator which is supplied by the pneumatic supply means. Therefore, the pneumatic actuator acts against the force of the pretensioning element or the force of the compression spring, respectively.
  • the circumference of the slidable clutch disk is provided with a ring-like sealing element which seals the circular gap between the slidable clutch disk and the inner side wall of the circular pump housing.
  • the sealing element is necessary to ensure an air-tight interna! pneumatic actuator so that the slidable clutch disk can be disengaged from: the fixed clutch disk by the pneumatic actuator or the low-pressure, respectively.
  • the sealing element can be, for instance, a Hp seal or a Teflon-efement.
  • the gap between the slidable clutch disk and the pump wheel shaft or, alternatively, the driven shaft is provided with a shaft sealing so that the gap is closed gas-tight. Therefore, the pneumatic actuator supplied with the low-pressure is able to disengage the slidable clutch disk from the fixed clutch disk by using the pneumatic supply means.
  • figure 1 shows a cross-sectional view of a mechanical coolant pump.
  • FIG. 1 shows a mechanical coolant pump 10 for providing a coolant to an internal combustion engine.
  • the mechanical coolant pump 10 comprises a stationary circular pump housing 12 with an internal pneumatic actuator 13, a pump wheel 18 with a pump wheel shaft 20, and a separate driven shaft 22 connected directly to a pulley wheel 24,
  • the shafts 20, 22 are rotatably supported at each axial end of the shafts 20, 22 by a roller bearing 40, 41 and a friction bearing 32, 33, respectively.
  • the pump wheel shaft friction bearing 32 is a sealing arrangement sealing a pneumatic chamber 50 against the ambient pressure.
  • the driven shaft 22 is connectable to the pump wheel shaft 20 by an internal pneumatic clutch unit 11, which is positioned inside the pump housing 12.
  • the clutch unit 11 comprises a fixed clutch disk 26 which is axially and rotatably fixed to the driven shaft 22 and an axially slidab!e clutch disk 28 which is arranged at the clutch-sided end section of the pump wheel shaft 20 and which is axially actuated by the internal pneumatic actuator 13.
  • the clutch-sided end section of the pump wheel shaft 20 provides a reduced cross-section diameter compared to the main portion of the pump wheel shaft 20, and is provided with a longitudinal slide-bar 34 at which the siidable dutch disk 28 is arranged axially siidable and rotatably fixed.
  • the gap between the siidable clutch disk and the pump wheel shaft 20 or the siide-bar 34, respectively, is sealed by a shaft sealing 17 substantially gas-tight.
  • the axial movement of the siidable clutch disk 28 into the disengaged position is limited at the opposite end of the pump wheel shaft 20 by a transversal stopping face 44, for example by a circular step at the shaft 20.
  • the siidable clutch disk 28 is pretensioned into the engaged position by a pretensioning element 36, whereby the pretensioning element 36 is a single compression spring which is positioned around the pump wheel shaft 20.
  • the compression spring acts with a constant pressure on the thrust face 27 of the siidable dutch disk 28 so that no tilting moment is generated and jamming of the siidable clutch disk 28 at the inner side wall 30 of the pump housing 12 can be avoided effectively.
  • the pretensioning element 36 is supported by the pump wheel shaft 20 via a spring supporting ring 42 which is directly fixed at the pump wheel shaft 20.
  • the circumference of the siidable clutch disk 28 is provided with a ring-like pneumatic sealing element 38.
  • the sealing element 38 seals the circular gap between the inner side wail 30 of the circular pump housing 12 and the siidable clutch disk 28 substantially but not perfectly gas-tight.
  • the pneumatic actuator 13 is defined by the siidable clutch disk 28 and the circular pump housing 12.
  • the pneumatic actuator 13 is arranged inside the pump housing 12.
  • the pump housing 12 is provided with a pneumatic opening 16 which connects the pneumatic actuator 13 with a pneumatic supply means 15.
  • the pneumatic supply means 15 comprises an engine intake section 45 which is supplying the low-pressure, a pneumatic valve 19 and a pneumatic control unit 21 which controls the pneumatic valve 19.
  • the pneumatic opening 16 is axiafly positioned between the pump wheel 18 and the siidable clutch disk 28.
  • the siidable clutch disk 28 can be disengaged by the pneumatic actuator 13 by opening the pneumatic valve 19 during the warming-up phase of the cold combustion engine. When the warming-up phase is finished and the engine is warm, the pneumatic valve 19 is closed so that the pressure in the pneumatic chamber 50 slowly increases up to atmospheric pressure through pneumatic leaks of the chamber 50.
  • the mechanical coolant pump 10 can be mounted directly to the engine block by a flange 48.

Abstract

The present invention refers to a mechanical coolant pump 10 for an internal combustion engine. The pump 10 comprises a stationary cylindrical pump housing 12 with an interna! pneumatic actuator 13 which is supplied by a pneumatic supply means 15 supplying a low-pressure, i.e. a pressure below the atmospheric pressure. Further, the pump 10 comprises a pump wheel 18 rotatably fixed with a pump wheel shaft 20, whereby the pump wheel shaft 20 is rotatably supported by the pump housing 12. The pump wheel shaft 20 is connectable to a separate driven shaft 22 by an internal pneumatic clutch unit 11, whereby the driven shaft 22 is directly connected with a pulley-wheel 24 which is driven by a driving belt. The interna! clutch unit 11 comprises a ciutch disk 26 which is completely fixed to the driven shaft 22 or, alternatively, to the pump wheel shaft 20, and an axfaily slidable clutch disk 28 which is siidably arranged at the pump wheel shaft 20 or, alternatively, at the driven shaft 22. The slidable clutch disk 28 is rotatably fixed to the pump wheel shaft 20 or, alternatively, to the driven shaft 22 and is axiaϋy actuated by the pneumatic actuator 13.

Description

D E S C R I P T I O N
Mechanical coolant pump
The present invention refers to a mechanical cooiant pump for an internal combustion engine,
A mechanica! coolant pump is a coolant pump which is driven by the combustion engine itself, for example by using a driving belt driving a pulley-wheel , of- the coolant pump. The pulley-wheel is driving the rotor shaft or a pump wheel which is rotatably fixed at the rotor shaft. The rotational speed of such a coolant pump is proportional to the rotational speed of the engine's crankshaft so that the coolant pump is running permanently even if no coolant flow is needed by the engine. This increases the fuel consumption of the combustion engine unnecessarily. Therefore switchable coolant pumps are used to optimize the energy consumption of the system. Especially, as long as the combustion engine is cold and no coolant flow is needed, the coolant pumps can be switched- off with the result that the combustion engine's warming-up phase is shortened, the exhaust emission decreases and the fuel consumption is reduced.
A mechanical cooiant pump of the prior art which is switchable is known from DE 10 2006 039 680 Al. The disclosed coolant pump is provided with an internal mechanical clutch which is arranged inside the pump housing. The mechanical clutch is provided by the pump wheel-sided end of the rotor shaft and the pump wheel so that the rotor shaft can be disengaged from the pump wheel, for instance, in the warming-up phase of the combustion engine. The mechanical clutch of such a coolant pump is controlled by a separate external actuator which is connected to the opposite end of the rotor shaft. An externa! actuator requires additional installation space in the engines compartment.
Therefore, it is an object of the present invention to provide a compact mechanical switchable coolant pump.
This object is solved with a mechanical coolant pump with the features of claim 1. The mechanicai coolant pump for an internal combustion engine according to claim 1 comprises a stationary cylindrical pump housing with an internal pneumatic actuator which is supplied by a pneumatic supply means supplying a low-pressure, i.e. a pressure below the atmospheric pressure. Further, the pump comprises a pump wheel rotatably fixed at a pump wheel shaft, whereby the pump wheel shaft is rotatably supported by the pump housing. The pump wheel shaft is connectable to a separate driven shaft by an internal pneumatic clutch unit, whereby the driven shaft is directly connected with a pulley-wheel which is driven by a driving belt. The internal clutch unit comprises a clutch disk which is completely fixed to the driven shaft or, aiternatively, to the pump wheel shaft, and an axiaily slidable clutch disk which is slidably arranged at the pump wheel shaft or, alternatively, at the driven shaft. The slidable clutch disk is rotatab!y fixed to the pump wheel shaft or, alternatively, to the driven shaft and is axiaily actuated by the pneumatic actuator.
The interna! pneumatic actuator uses a low-pressure to actuate the clutch unit, more specifically, to actuate the slidable clutch disk. The low- pressure is supplied by the pneumatic supply means. The pneumatic supply means can be represented by the intake section of the combustion engine and a pneumatic va!ve so that the coolant pump does not need an external actuator. This minimizes the size of the switchable coolant pump so that the required installation space is minimized in comparison to a switchable coolant pump with a separate externa! actuator,
Preferably, the pump wheel shaft or, alternatively, the driven shaft is provided with a longitudinal slide-bar at the clutch-sided end section of the shaft where the slidable clutch disk is arranged. This end section can be defined by a reduced cross-section compared to the other section of the shaft. The slidable clutch disk is rotatably fixed by the slide-bar and sltdably arranged at the slide-bar. The axial movement of the slidable clutch disk into the disengaged position is limited at the opposite end by a radial stopping face, for example by a circular step in the shaft.
According to a preferred embodiment, the slidable clutch disk is pretensioned into the engaged position by a pretensioning element, whereby the pretensioning element is preferably a compression spring. The pretension element is preferably supported by the shaft, for instance, by a spring supporting plate which is fixed to the shaft. The spring supporting plate is a mechanical support of the pretensioning element. The pretensioning into the engaged position makes the pump fail-safe so that the operation or the cooling of the engine, respectively, is guaranteed even if the actuator fails. The clutch can be disengaged when needed, for instance, during the warming-up phase of the engine by the pneumatic actuator which is supplied by the pneumatic supply means, The pneumatic supply means comprises an intake section which is supplying the low- pressure, a pneumatic valve, and a pneumatic control unit which controls the pneumatic valve.
According to a preferred embodiment, the internal pneumatic actuator is defined by the slidable clutch disk and the pump housing. The clutch disk is an integral part of the pneumatic actuator, Preferably, the pump housing Is provided with a pneumatic opening provided axiafly between the slidab!e clutch disk and the pump wheel or, alternatively, the pulley-wheel. The pneumatic opening is connected to the pneumatic supply means. The slidable clutch disk can be disengaged from the fixed clutch disk by using the internal pneumatic actuator which is supplied by the pneumatic supply means. Therefore, the pneumatic actuator acts against the force of the pretensioning element or the force of the compression spring, respectively.
Preferably, the circumference of the slidable clutch disk is provided with a ring-like sealing element which seals the circular gap between the slidable clutch disk and the inner side wall of the circular pump housing. The sealing element is necessary to ensure an air-tight interna! pneumatic actuator so that the slidable clutch disk can be disengaged from: the fixed clutch disk by the pneumatic actuator or the low-pressure, respectively. The sealing element can be, for instance, a Hp seal or a Teflon-efement.
According to a preferred embodiment, the gap between the slidable clutch disk and the pump wheel shaft or, alternatively, the driven shaft is provided with a shaft sealing so that the gap is closed gas-tight. Therefore, the pneumatic actuator supplied with the low-pressure is able to disengage the slidable clutch disk from the fixed clutch disk by using the pneumatic supply means.
One preferred embodiment of the invention is described with reference to the drawing, wherein figure 1 shows a cross-sectional view of a mechanical coolant pump.
Figure 1 shows a mechanical coolant pump 10 for providing a coolant to an internal combustion engine. The mechanical coolant pump 10 comprises a stationary circular pump housing 12 with an internal pneumatic actuator 13, a pump wheel 18 with a pump wheel shaft 20, and a separate driven shaft 22 connected directly to a pulley wheel 24,
The shafts 20, 22 are rotatably supported at each axial end of the shafts 20, 22 by a roller bearing 40, 41 and a friction bearing 32, 33, respectively. The pump wheel shaft friction bearing 32 is a sealing arrangement sealing a pneumatic chamber 50 against the ambient pressure.
The driven shaft 22 is connectable to the pump wheel shaft 20 by an internal pneumatic clutch unit 11, which is positioned inside the pump housing 12. The clutch unit 11 comprises a fixed clutch disk 26 which is axially and rotatably fixed to the driven shaft 22 and an axially slidab!e clutch disk 28 which is arranged at the clutch-sided end section of the pump wheel shaft 20 and which is axially actuated by the internal pneumatic actuator 13.
The clutch-sided end section of the pump wheel shaft 20 provides a reduced cross-section diameter compared to the main portion of the pump wheel shaft 20, and is provided with a longitudinal slide-bar 34 at which the siidable dutch disk 28 is arranged axially siidable and rotatably fixed. The gap between the siidable clutch disk and the pump wheel shaft 20 or the siide-bar 34, respectively, is sealed by a shaft sealing 17 substantially gas-tight. The axial movement of the siidable clutch disk 28 into the disengaged position is limited at the opposite end of the pump wheel shaft 20 by a transversal stopping face 44, for example by a circular step at the shaft 20.
The siidable clutch disk 28 is pretensioned into the engaged position by a pretensioning element 36, whereby the pretensioning element 36 is a single compression spring which is positioned around the pump wheel shaft 20. The compression spring acts with a constant pressure on the thrust face 27 of the siidable dutch disk 28 so that no tilting moment is generated and jamming of the siidable clutch disk 28 at the inner side wall 30 of the pump housing 12 can be avoided effectively. The pretensioning element 36 is supported by the pump wheel shaft 20 via a spring supporting ring 42 which is directly fixed at the pump wheel shaft 20.
The circumference of the siidable clutch disk 28 is provided with a ring-like pneumatic sealing element 38. The sealing element 38 seals the circular gap between the inner side wail 30 of the circular pump housing 12 and the siidable clutch disk 28 substantially but not perfectly gas-tight.
The pneumatic actuator 13 is defined by the siidable clutch disk 28 and the circular pump housing 12. The pneumatic actuator 13 is arranged inside the pump housing 12. The pump housing 12 is provided with a pneumatic opening 16 which connects the pneumatic actuator 13 with a pneumatic supply means 15. The pneumatic supply means 15 comprises an engine intake section 45 which is supplying the low-pressure, a pneumatic valve 19 and a pneumatic control unit 21 which controls the pneumatic valve 19. The pneumatic opening 16 is axiafly positioned between the pump wheel 18 and the siidable clutch disk 28. The siidable clutch disk 28 can be disengaged by the pneumatic actuator 13 by opening the pneumatic valve 19 during the warming-up phase of the cold combustion engine. When the warming-up phase is finished and the engine is warm, the pneumatic valve 19 is closed so that the pressure in the pneumatic chamber 50 slowly increases up to atmospheric pressure through pneumatic leaks of the chamber 50.
The mechanical coolant pump 10 can be mounted directly to the engine block by a flange 48.

Claims

C L A I M S 1 . Mechanical cooiant pump (10) for an interna! combustion engine, comprising:
a stationary pump housing (12) with an internal pneumatic actuator
(13) supplied by a pneumatic supply means (15),
a pump wheel (18) with a pump wheel shaft (20), whereby the pump wheel shaft (20) is rotatably supported by the pump housing
(12),
a separate driven shaft (22) directly connected with a pulley-wheel (24), the driven shaft (22) being connectable to the pump wheel shaft (20) by an internal pneumatic clutch unit (11), the clutch unit (11) comprising :
a fixed clutch disk (26) attached to the driven shaft (22) or the pump wheel shaft (20),
an axially s!idabie ciutch disk (28) siidably arranged at the pump wheel shaft (20) or the driven shaft (22), whereby the slidable clutch disk (28) is rotatably fixed to the pump wheel shaft (20) or to the driven shaft (22), and
the pneumatic actuator (13) axially actuating the slidable ciutch disk (28).
2. Mechanical coolant pump (10) of claim 1, whereby the interna! pneumatic actuator (13) is defined by the slidable clutch disk (28) and the pump housing (12).
3. Mechanical cooiant pump (10) of claim 1 or 2, whereby the pump wheel shaft (20) or the driven shaft (22) is provided with a slide-bar (34) at the clutch-sided end, and whereby the slidable clutch disk (28) is rotatably fixed by the slide-bar (34).
4. Mechanical coolant pump (10) of one of the preceding claims, whereby the slidab!e clutch disk (28) is axiai!y pretensioned into the engaged position by a pretensioning element (36).
5. Mechanical coolant pump (10) of one of the preceding claims, whereby a pneumatic opening (16) is provided at the pump housing (12) axiaily between the slidable clutch disk (28) and the pump wheel (18) or the pui!ey-wheei (24), and whereby the pneumatic opening (16) is connected to the pneumatic supply means (15).
6. Mechanical coolant pump (10) of one of the preceding claims, whereby the circumference of the slidable clutch disk (28) is provided with a ring-like sealing element (38) sealing the circular gap between the slidable clutch disk (28) and the inner side wall
(30) of the pump housing (12).
7. Mechanical coolant pump (10) of one of the preceding claims, whereby a shaft sealing (17) between the slidable clutch disk (28) and the pump wheel shaft (20) is provided.
8. Mechanical coolant pump (10) of one of the preceding claims, whereby the pretensioning element (36) is supported by the pump wheel shaft (20) or the driven shaft (22).
9. Mechanical coolant pump (10) of claim 4, whereby the pretensioning element (36) is a compression spring.
EP10752794.7A 2010-09-07 2010-09-07 Mechanical coolant pump Withdrawn EP2614233A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2010/063123 WO2012031624A1 (en) 2010-09-07 2010-09-07 Mechanical coolant pump

Publications (1)

Publication Number Publication Date
EP2614233A1 true EP2614233A1 (en) 2013-07-17

Family

ID=44012362

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10752794.7A Withdrawn EP2614233A1 (en) 2010-09-07 2010-09-07 Mechanical coolant pump

Country Status (4)

Country Link
US (1) US20130233257A1 (en)
EP (1) EP2614233A1 (en)
CN (1) CN103201475A (en)
WO (1) WO2012031624A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6007303A (en) * 1997-01-22 1999-12-28 Schmidt; Eugen Controllable coolant pump for motor vehicles
EP2375026A1 (en) * 2010-03-25 2011-10-12 Dayco Europe S.R.L. Disengageable pulley unit to preferably drive an accessory device of an internal combustion engine

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JP3651083B2 (en) * 1995-09-27 2005-05-25 アイシン精機株式会社 Automotive engine water cooling system
DE10013252A1 (en) * 2000-03-17 2001-10-25 Audi Ag Refrigerant pump for vehicle internal combustion engine; has mechanically driven impeller coupled by friction coupling closed by spring and opened hydraulically, electromagnetically or pneumatically
US6644933B2 (en) * 2002-01-02 2003-11-11 Borgwarner, Inc. Water pump with electronically controlled viscous coupling drive
DE102006039680A1 (en) 2006-08-24 2008-02-28 Audi Ag Coolant pump for cooling circuit of internal combustion engine, has adjustable clutch arranged at opposite front end of pump shaft, between pump shaft and pump impeller
JP4429307B2 (en) * 2006-12-27 2010-03-10 トヨタ自動車株式会社 water pump
JP2008185003A (en) * 2007-01-31 2008-08-14 Toyota Motor Corp Power transmitting mechanism and water pump which is provided with it
JP4297946B2 (en) * 2007-03-20 2009-07-15 トヨタ自動車株式会社 Pressure operating mechanism and water pump provided with the pressure operating mechanism
JP2009024632A (en) * 2007-07-20 2009-02-05 Toyota Motor Corp Water pump
CN201090630Y (en) * 2007-09-19 2008-07-23 薛宗浩 Pneumatic engaging and disengaging gear for automobile

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6007303A (en) * 1997-01-22 1999-12-28 Schmidt; Eugen Controllable coolant pump for motor vehicles
EP2375026A1 (en) * 2010-03-25 2011-10-12 Dayco Europe S.R.L. Disengageable pulley unit to preferably drive an accessory device of an internal combustion engine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2012031624A1 *

Also Published As

Publication number Publication date
US20130233257A1 (en) 2013-09-12
WO2012031624A1 (en) 2012-03-15
CN103201475A (en) 2013-07-10

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