EP2815094B1 - Pompe mécanique de liquide de refroidissement - Google Patents

Pompe mécanique de liquide de refroidissement Download PDF

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Publication number
EP2815094B1
EP2815094B1 EP12734930.6A EP12734930A EP2815094B1 EP 2815094 B1 EP2815094 B1 EP 2815094B1 EP 12734930 A EP12734930 A EP 12734930A EP 2815094 B1 EP2815094 B1 EP 2815094B1
Authority
EP
European Patent Office
Prior art keywords
valve
retaining section
outlet
coolant pump
valve body
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
EP12734930.6A
Other languages
German (de)
English (en)
Other versions
EP2815094A1 (fr
Inventor
Bernd WICKERATH
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
Priority claimed from PCT/EP2012/052525 external-priority patent/WO2013120514A1/fr
Application filed by Pierburg Pump Technology GmbH filed Critical Pierburg Pump Technology GmbH
Priority to EP12734930.6A priority Critical patent/EP2815094B1/fr
Publication of EP2815094A1 publication Critical patent/EP2815094A1/fr
Application granted granted Critical
Publication of EP2815094B1 publication Critical patent/EP2815094B1/fr
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
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant 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
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
    • F04D15/0022—Control, e.g. regulation, of pumps, pumping installations or systems by using valves throttling valves or valves varying the pump inlet opening or the outlet opening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/466—Fluid-guiding means, e.g. diffusers adjustable especially adapted for liquid fluid pumps
    • F04D29/468—Fluid-guiding means, e.g. diffusers adjustable especially adapted for liquid fluid pumps adjusting flow cross-section, otherwise than by using adjustable stator blades

Definitions

  • the present invention refers to a mechanical coolant pump for an internal combustion engine.
  • a mechanical coolant pump is driven by the combustion engine, for example by using a driving belt driving a driving wheel of the pump, so that the rotational speed of the coolant pump is proportional with the rotational speed of the combustion engine.
  • mechanical coolant pumps can be provided with an outlet valve arrangement for controlling the coolant flow leaving the coolant pump. As long as the combustion engine is cold, the outlet valve is closed so that the circulation of the lubricant is reduced, minimized or completely stopped, with the result that the combustion engine's warming-up phase is shortened and the energy consumption of the coolant pump is reduced.
  • WO 2011/101019 A1 discloses an impeller-type mechanical coolant pump with an outlet valve arrangement in the root of an outlet channel.
  • the coolant pump is provided with one single coolant outlet.
  • the valve When the valve is closed, the complete coolant delivery is stopped so that neither the engine itself nor any other device of the engine, such as for example an exhaust gas recirculation cooler, is supplled with a coolant flow.
  • WO2011/095907 discloses an impeller-type mechanical coolant pump with two outlet channels and an outlet valve arrangement defined by a rotatably flap which leaves both outlet channels open in the open flap position and closes one outlet channel completely and the other outlet channel in part in the closed flap position.
  • the mechanical coolant pump according to claim 1 is provided with an impeller pump wheel pumping the liquid coolant incoming in the axial direction radially into an outlet volute.
  • the outlet volute is defined by the pump housing which also defines two outlet channels, namely a first outlet channel and a separate second outlet channel which is fluidically parallel to the first outlet channel.
  • the first outlet channel can, for example, be provided for supplying the engine with the coolant.
  • the second outlet channel can, for example, be provided for supplying an exhaust gas recirculation cooler with the coolant.
  • An exhaust gas recirculation cooler warms up much faster than the engine itself after the engine has been started. Additionally, even in the engine's warming-up phase, the exhaust gas can become very hot so that the exhaust gas recirculation cooler needs to be cooled by the liquid coolant even if the engine itself has not reached its working temperature.
  • the mechanical coolant pump is provided with an outlet valve arrangement fluidically arranged before the first outlet channel and the second outlet channel.
  • the valve arrangement is provided with a first valve opening of the first outlet channel and with a second the valve opening of the second outlet channel.
  • the valve openings are preferably arranged at the beginning of the respective outlet channel, but are not necessarily arranged at the beginning of the respective outlet channel.
  • the outlet valve arrangement comprises an integral valve body with a first retaining section and a second retaining section.
  • the valve body is provided pivotable between an open position and a closed position. In the closed position of the valve body, the first retaining section completely closes the first valve opening and the second retaining section only partially closes the second valve opening so that the second valve opening remains partially open.
  • the valve body is not necessarily made out of one single piece but it is an integral part comprising both retaining sections.
  • both retaining sections When the valve body is in its open position, both retaining sections are in an open position so that both valve openings are completely open.
  • the closed valve body position only the first outlet channel is completely closed. If only the first valve opening would be closed whereas the second valve opening would remain completely open, then the coolant flow through the second valve opening into the second outlet channel would be increased significantly which is not useful.
  • the second retaining section which covers the second valve opening in part only but not completely the coolant flow through the second valve opening into the second outlet channel can be adjusted more or less to the coolant flow through the second valve opening when the valve body is in its open position. Therefore, the cooling control characteristics of the device which is supplied via the second outlet channel is not changed significantly. Beside of that, the energy consumption of the coolant pump is relatively low because less coolant is pumped by the coolant pump into the second outlet channel in the closed valve body position.
  • the valve body is provided with a circular disk body at one axial end of the valve body.
  • the valve body is pivotable around the center pivot axis of the circular disk body.
  • the valve body is provided with two circular disk bodies, one disk body at each axial end of the valve body.
  • the valve body has preferably the geometry of a hollow cylindrical body whereby the plane end walls are the circular disk bodies and parts of the cylinder define the two retaining sections.
  • the proximal surface of the circular disk body is orientated substantially perpendicular to the general plane of the retaining sections.
  • Both retaining sections define a circle segment of the cylinder defined by the circular disk body.
  • the pump housing is provided with a recess for recessing at least one retaining section in the open valve position, and preferably, for housing at least the first retaining section.
  • the second retaining section is housed in the recess in the open valve body position.
  • the pump housing is provided with a circular recess for recessing and embedding the corresponding circular disk body so that the proximal surface of the disk body and of the pump housing are defining a stepless surface with a low fluidic resistance.
  • valve body pivot axis is provided within the outlet volute which is the fluidic channel right before the outlet valve arrangement.
  • the proximal surfaces of the two retaining sections are distant from the pivot axis with an offset distance of minimally one fourth of the maximum outside radius of the cylinder embedding the valve body.
  • the proximal retaining section surface is the surface which is facing the outlet volute in the open valve body position.
  • the distal retaining section surface is the surface which is facing the corresponding outlet channel in the closed valve body position.
  • the second retaining section is adjacent to the first retaining section so that both retaining sections define a single surface.
  • the second retaining section can be arranged tangential to the first retaining body.
  • the corresponding valve openings are also arranged in tangential direction to each other.
  • the second retaining section can be arranged axially of the first retaining section.
  • the corresponding valve openings are also arranged and neighbored axially to each other.
  • the figures 1 to 7 show a mechanical coolant pump 10 for circulating a coolant in two separate parallel coolant circuits of an internal combustion engine.
  • the first coolant circuit can be the engine block itself and the second coolant circuit can be a heat exchanger of another device related to the engine, for example of an exhaust gas recirculation cooler, an oil cooler, an exhaust gas cooler etc.
  • the coolant pump 10 is provided with a driving wheel 44 which can be driven by a driving belt which is directly driven by the internal combustion engine.
  • the driving wheel 44 and the pump wheel 40 are connected to each other by a rotor shaft 42.
  • the rotational speed of the coolant pump 10 is proportional to the rotational speed of the internal combustion engine.
  • the coolant pump 10 can be directly mounted to the engine block.
  • the coolant pump is provided with a pump housing 12 housing an impeller pump wheel 40 pumping a liquid coolant incoming in axial direction radially into an outlet volute 13.
  • the coolant inlet of the pump 10 is provided at the bottom side of the coolant pump.
  • the pump housing 12 defines two separate parallel outlet channels 14, 16 with a first valve opening 15 and a second valve opening 17 at the end of the outlet volute 13.
  • the two outlet channels 14, 16 are separated from each other by a separation wall 60.
  • the first outlet channel 14 is the main outlet channel and is, for example, connected with the engine block for cooling the engine block.
  • the second outlet channel 16 is smaller in cross section as the first outlet channel 14 and is connected to a secondary cooling object, for example, is connected to an exhaust gas recirculation cooler.
  • an outlet valve arrangement is provided for controlling the coolant flow through the outlet channels 14, 16.
  • the outlet valve arrangement is provided with a single integral valve body 20 with a generally cylindrical basic geometry.
  • the diameter of the valve body cylinder is greater than the width of the first the valve opening 15 and can be even greater than the width of the volute opening right before the valve openings 15, 16.
  • the end faces of the somehow cylindrical valve body 20 are defined by two circular disk bodies 28, 32 which are completely recessed in corresponding circular recesses 29, 33 of the pump housing 12.
  • the valve body 20 is pivoted around a pivot axis 30 which is the center axis of the cylinder and of the circular disk bodies 28,32.
  • the valve body 20 is actuated by a linear pneumatic actuator 38 via a lever arm 36 and a valve shaft 34 between an open valve position and a closed valve position.
  • the metal valve body 20 is provided with two integral retaining sections 24, 26 which are defined by one single circle segment 22 of the cylinder geometry defined by the circular disk bodies 28, 32.
  • the two integral retaining sections 24,26 are in the first embodiment arranged tangentially to each other, i.e. directly adjacent to each other in a circumferential direction of the cylinder geometry.
  • the circle segment 22 defining the two adjacent integral retaining sections 24, 26 is recessed in a corresponding recess 21 in a side wall 11 of the pump housing 12 in the open valve position so that a step-free sidewall is realized resulting in a low flow resistance.
  • the valve body 20 In the closed valve position which is shown in figures 2 and 4 , the valve body 20 has been pivoted by around 90° with respect to the open valve position so that the circle segment 22 defining the two adjacent integral retaining sections 24, 26 is positioned in the valve openings 15, 17 of the first and the second outlet channel 14, 16.
  • the first retaining section 24 completely closes the first valve opening 15 of the first outlet channel 14.
  • the second retaining section 26 does not close the second valve opening 17 completely but covers between 40% to 80% of the opening area of the second valve opening 17.
  • the valve body 20 completely closes the first outlet channel 14 and defines a throttle valve with respect to the second outlet channel 16.
  • the coolant flow through the second outlet channel 16 remains more or less constant independent of the valve body 20 being positioned in its open position as shown in figure 1 or its closed position as shown in figure 2 .
  • the valve body 20' is provided with two retaining sections 24', 26' which are arranged separately and not directly adjacent to each other. However, the two retaining sections 24', 26' are arranged tangentially to each other. In the open valve position as shown in figure 5 , the second retaining section 26' is positioned at the front end of the separation wall 60. When the valve body 20' is moving into its closed position, both valve openings 15, 17 are closed synchronously so that a coolant flow peak through the second outlet channel 16 can be avoided during the closing movement.
  • the coolant pump 10 according to the third embodiment shown in figure 7 is provided with another variation of the valve openings 15', 17' and the corresponding retaining sections 24",26" of the valve body.
  • the pump valve openings 15',17' as well as the corresponding retaining sections 24",26" are arranged axially to each other so that the retaining sections 24",26" define a single circle segment 22' and a synchronic opening and closing of both valve openings 15', 17' is realized.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (6)

  1. Pompe (10) mécanique de liquide de refroidissement destinée à un moteur à combustion interne, avec
    une roue (40) de pompe à ailettes pompant le liquide de refroidissement, qui entre dans la direction axiale, radialement dans une volute de sortie (13),
    un carter de pompe (12) délimitant la volute de sortie (13), un premier conduit de sortie (14) et un deuxième conduit de sortie (16) séparé et fluidiquement parallèle,
    un ensemble de soupape de sortie, situé fluidiquement avant le premier conduit de sortie (14) et un deuxième conduit de sortie (16), et
    une première ouverture de soupape (15) du premier conduit de sortie (14) et une deuxième ouverture de soupape (17) du deuxième conduit de sortie (16), dans lequel
    l'ensemble de soupape de sortie comprend un corps de soupape (20) en une pièce, qui a une première section de retenue (24) et une deuxième section de retenue (26), ledit corps de soupape (20) pouvant être pivoté entre une position d'ouverture et une position de fermeture,
    dans la position de fermeture du corps de soupape (20), la première section de retenue (24) ferme la première ouverture de soupape (15) complètement, et la deuxième section de retenue (26) ne ferme que partiellement la deuxième ouverture de soupape (17), de sorte que la deuxième ouverture de soupape (17) reste partiellement ouverte, la pompe (10) mécanique de liquide de refroidissement étant caractérisée en ce que
    le corps de soupape (20) est muni d'un corps de disque circulaire (28, 32) à une extrémité axiale du corps de soupape (20), ledit cops de soupape (20) pouvant être pivoté autour l'axe de pivotement central (30) du corps de disque circulaire (28, 32),
    les deux sections de retenue (24, 26) délimitent un segment de cercle dudit cercle formé par ledit corps de disque circulaire (28, 32), et
    le carter de pompe (12) est muni d'un renfoncement (33) pour accommoder au moins une section de retenue (24, 26) dans la position d'ouverture de la soupape.
  2. Pompe (10) mécanique de liquide de refroidissement selon la revendication 1, dans laquelle le carter de pompe (12) est muni d'un renfoncement circulaire (29, 33) pour accommoder ledit corps de disque circulaire (28, 32).
  3. Pompe (10) mécanique de liquide de refroidissement selon l'une quelconque des revendications précédentes, dans laquelle l'axe de pivotement du corps de soupape (30) est situé dans la volute de sortie (13).
  4. Pompe (10) mécanique de liquide de refroidissement selon l'une quelconque des revendications précédentes, dans laquelle la deuxième section de retenue (26) est adjacente à la première section de retenue (24) de sorte que les deux sections de retenue (24, 26) forment une seule surface.
  5. Pompe (10) mécanique de liquide de refroidissement selon l'une quelconque des revendications précédentes, dans laquelle la deuxième section de retenue (26, 26') est située tangentiellement par rapport à la première section de retenue (24, 24').
  6. Pompe (10) mécanique de liquide de refroidissement selon l'une quelconque des revendications précédentes 1 à 4, dans laquelle la deuxième section de retenue (26') est située axialement par rapport à la première section de retenue (24').
EP12734930.6A 2012-02-14 2012-07-09 Pompe mécanique de liquide de refroidissement Active EP2815094B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12734930.6A EP2815094B1 (fr) 2012-02-14 2012-07-09 Pompe mécanique de liquide de refroidissement

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
PCT/EP2012/052525 WO2013120514A1 (fr) 2012-02-14 2012-02-14 Pompe mécanique à liquide de refroidissement
PCT/EP2012/060275 WO2013120542A1 (fr) 2012-02-14 2012-05-31 Pompe mécanique de liquide de refroidissement
EP12734930.6A EP2815094B1 (fr) 2012-02-14 2012-07-09 Pompe mécanique de liquide de refroidissement
PCT/EP2012/063435 WO2013120543A1 (fr) 2012-02-14 2012-07-09 Pompe mécanique de liquide de refroidissement

Publications (2)

Publication Number Publication Date
EP2815094A1 EP2815094A1 (fr) 2014-12-24
EP2815094B1 true EP2815094B1 (fr) 2016-05-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP12734930.6A Active EP2815094B1 (fr) 2012-02-14 2012-07-09 Pompe mécanique de liquide de refroidissement

Country Status (1)

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EP (1) EP2815094B1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUB20155338A1 (it) * 2015-10-30 2017-04-30 Ind Saleri Italo Spa Gruppo valvola estraibile con otturatore con pluralita di porzioni attive
WO2017124198A1 (fr) * 2016-01-22 2017-07-27 Litens Automotive Partnership Pompe comprenant un déflecteur d'écoulement formant une volute

Also Published As

Publication number Publication date
EP2815094A1 (fr) 2014-12-24

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