EP1420148B1 - Fluid module for delivering constant pressure fluid - Google Patents

Fluid module for delivering constant pressure fluid Download PDF

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Publication number
EP1420148B1
EP1420148B1 EP03104157A EP03104157A EP1420148B1 EP 1420148 B1 EP1420148 B1 EP 1420148B1 EP 03104157 A EP03104157 A EP 03104157A EP 03104157 A EP03104157 A EP 03104157A EP 1420148 B1 EP1420148 B1 EP 1420148B1
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EP
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Prior art keywords
liquid
pressure
duct
pressure regulating
regulating valve
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EP03104157A
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German (de)
French (fr)
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EP1420148A2 (en
EP1420148A3 (en
Inventor
Martin Weindorf
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Mann and Hummel GmbH
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Mann and Hummel GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/16—Controlling lubricant pressure or quantity

Definitions

  • the invention relates to a fluid module, in particular an oil module for an internal combustion engine, for generating a fluid pressure according to the preamble of claim 1. Furthermore, the invention relates to a method for generating constant fluid pressures according to claim 8.
  • oil modules known in the art, which are provided for controlling an oil pressure in an oil circuit for cooling piston of an internal combustion engine.
  • the oil serves as a coolant and is sprayed onto the piston to be cooled.
  • the cooling oil jet must always hit each piston at the same cooling point to provide effective cooling. Therefore, the oil pressure in this area of the oil circuit must be constant.
  • Various components, such as the oil pump generate different pressures depending on the load condition. So that the oil jet impinging on the pistons is not exposed to these pressure fluctuations, two valves are arranged in the oil module, which compensate for the pressure differences.
  • the first valve is an on / off valve and the second valve is a control valve.
  • the oil pressure generated by the oil pump is applied to this on / off valve.
  • this valve opens a passage and allows the oil to flow with the total oil pressure to the control valve.
  • the ON / OFF valve remains closed, since in this operating condition, a cooling of the piston is not desirable.
  • the control valve is disposed in the fluid passageway coming from the ON / OFF valve and has a piston area and a throttle area. The piston area is connected to the fluid channel via a control channel. Thus, the same pressure prevails at the piston area as in the fluid channel.
  • the piston is lifted and the throttle area of the control valve reduces the cross-sectional area of the fluid channel, whereby less oil can flow through the fluid channel and the oil pressure after the control valve is thus reduced to the predetermined oil pressure.
  • a disadvantage of the known oil module are the high cost of the two valves, as well as the complex installation of the two valves in the oil module.
  • the object of the invention is thus the reduction of the number of components, as well as the cost. This object is solved by the features of claim 1.
  • the invention relates to a liquid module according to claim 1 and a method according to claim 8.
  • the liquid module according to the invention serves to generate constant liquid pressures in liquid systems.
  • Such liquid modules may e.g. used in fuel / water pipes or in oil circuits in which constant pressures are required, in which case the use of the liquid module in the piston cooling of internal combustion engines is a particular use.
  • the liquid module has an inlet through which the liquid enters the liquid module and a Outlet through which the liquid emerges from the liquid module on.
  • the inlet is connected via a fluid channel corresponding to the outlet.
  • a valve is arranged, wherein the valve is a pressure regulating valve. In a first position, the pressure control valve completely closes the fluid channel. This first position assumes the pressure control valve when the fluid pressure is below a defined fluid pressure.
  • the defined fluid pressure is dependent on the fluid pressure required in the fluid system. He can e.g. be 2.8 bar in the case of the piston cooling, this pressure must be constant and to cool the piston effectively. Below the defined fluid pressure, the pressure control valve must be closed, otherwise the fluid system will not work properly. In the case of piston cooling, e.g. For example, the jet of oil would hit the piston at a location unsuitable for cooling, resulting in high oil loss without effective cooling or even piston damage.
  • the pressure regulating valve in a second position opens the fluid channel and allows the fluid to flow at least partially to the outlet. This second position can take any intermediate position in which liquid can flow through the pressure control valve.
  • the pressure regulating valve is connected to the fluid channel via an ON / OFF channel and a pressure regulating channel.
  • the ON / OFF channel is connected upstream of the pressure regulating valve. In this ON / OFF channel, the fluid pressure that enters the fluid module through the inlet prevails.
  • the pressure control channel is downstream with connected to the pressure control valve. In this pressure control channel, a fluid pressure is present only when the fluid pressure in the ON / OFF channel exceeds the defined fluid pressure.
  • the applied in the pressure control channel fluid pressure can reach the maximum, prevailing in the ON / OFF channel pressure, the pressure prevailing in the pressure control channel fluid pressure is usually less.
  • the pressure regulating valve fulfills the function of an ON / OFF valve and the function of a control valve, thus the number of components required for the function of the liquid module is reduced. Furthermore, the assembly effort is reduced because only a single valve must be mounted.
  • other components such as liquid filter or liquid cooler can be integrated.
  • the liquid filters may be arranged before or after the pressure regulating valve and remove impurities from the liquid.
  • the liquid coolers can also be arranged before or after the pressure regulating valve, wherein they can reduce the temperature of the liquid to a defined temperature.
  • the liquid filter can be designed as a removable cartridge, which has a filter housing which can be screwed to the housing, for example. However, embodiments are also conceivable in which the liquid module has an openable volume into which a filter element can be inserted.
  • the pressure regulating valve has a piston area which is connected to the on / off channel.
  • the piston area is designed in such a way that the fluid pressure prevailing in the ON / OFF channel reliably lifts the piston area of the pressure regulating valve from its piston seat when the defined fluid pressure is exceeded.
  • the piston region can have a plurality of surface regions which come into contact with the liquid and the liquid pressure one after the other.
  • the pressure regulating valve can perform a predefined movement as a function of the fluid pressure.
  • a development of the invention provides that the piston region of the pressure regulating valve has an internal volume which can be connected via an opening to the ON / OFF channel.
  • the breakthrough is arranged in the wall bounding the inner volume, wherein the breakthrough may be arranged on the circumference or in the end faces.
  • the liquid enters the interior of the piston area, as a result of which the fluid pressure in the interior volume of the piston area is not exposed to any flow and is therefore not exposed to any disturbing factors.
  • the inner volume of the piston area can be designed arbitrarily, wherein advantageous embodiments provide a cylindrical or cuboid configuration.
  • the pressure regulating valve has a throttle region, wherein the liquid channel is variable in a partial region of its cross section through the throttle region.
  • Part of the throttle area has a smaller cross section than the channel surrounding it. This smaller cross section may e.g. cylindrical, conical or other shapes.
  • the throttle region In its end region, the throttle region has a closure which can completely close the channel surrounding it. Through the throttle area, the flow rate of the liquid to regulate, which can then also be adjusted by the outlet pressure exiting.
  • the internal volume of the piston area can be connected via a passage to the pressure regulating channel.
  • This passage can be arranged on the circumference or in the end faces of the piston area.
  • the inner volume of the piston area is connected in a first position exclusively with the ON / OFF channel and in a second position exclusively communicating with the pressure control channel.
  • either the fluid pressure of the ON / OFF channel or the fluid pressure of the pressure control channel acts on the piston area, whereby defined pressure conditions are given.
  • a separation of the ON / OFF channel is maintained by the pressure control channel, whereby no by-pass of the liquid is caused by the throttle region over.
  • a further embodiment of the liquid module according to the invention provides that the throttling region of the pressure regulating valve adjoins the piston region and that the pressure regulating valve has a piston seat region which defines an end region of the pressure regulating valve.
  • a pressure regulating valve is provided. At a liquid pressure which is lower than the defined minimum liquid pressure, the pressure regulating valve remains closed.
  • the pressure regulating valve is connected via an ON / OFF channel with the liquid line coming from the inlet.
  • the pressure regulating valve at least partially opens a throttle bore, whereby at least parts of the liquid can flow past the pressure regulating valve in the direction of the outlet. In this case, the liquid penetrates into a pressure control channel a, which is also connected to the pressure control valve.
  • the pressure control valve adjusts the permissible flow rate of the liquid.
  • the pressure regulating valve opens only a small cross section and at pressures which are only slightly above the minimum liquid pressure, the pressure regulating valve opens a larger cross section.
  • an oil circuit is shown schematically.
  • the oil circuit which is provided for cooling piston 10 of an internal combustion engine 11, has an oil pan 12, an oil pump 13 and an oil module 14.
  • the oil pump 13 delivers oil from the oil pan 12 to the oil module 14, wherein the oil pump can of course also be arranged in the oil pan 12.
  • the oil pump 13 promotes more or less oil from the oil pan 12, whereby the oil pressure in one, the oil pump 13 to the oil module 14 connecting oil line 15 is not constant.
  • the oil module 14 regulates the oil pressure and leads the piston 10 of the internal combustion engine 11 via the supply line 16 oil at a constant Oil pressure of eg 2.8 bar too.
  • the oil is injected onto the pistons 10 to reduce the temperature in the pistons 10.
  • the oil runs out of the internal combustion engine 11 and is supplied via a return line 17 of the oil pan 12 again.
  • the oil can of course be passed through an oil cooler (not shown) so as not to heat the oil in the oil pan 12.
  • FIG. 2 shows a section of an oil module 14 in section.
  • the oil module 14 has a housing 18 which has an inlet 19 and an outlet 20.
  • the inlet 19 is connected to the outlet 20 via an oil passage 21.
  • a pressure regulating valve 22 is disposed in the oil passage 21, the pressure regulating valve 22 being shown in the OPEN position.
  • the pressure regulating valve 22 is formed by a valve body 27 and a helical valve spring 23.
  • the valve spring 23 is compressed in the open position, since the valve body 27 presses on the valve spring 23.
  • other components such as foams or elastomers could be used, which could also fulfill the tasks of the valve spring 23.
  • the valve spring 23 is arranged in a spring seat 24, wherein the spring seat 24 is closed by a plug 25. Furthermore, the spring seat 24 has a vent hole 26 through which air can escape from the spring seat 24 or flow when the valve body 27 is moved.
  • the valve body 27 has a piston region 28, a throttling region 29 and a closure region 30.
  • the piston region 28 has a cylindrical inner volume 31, which in the opened state is connected via a passage 32 on its end face to a pressure regulating channel 33. In the closed position of the pressure control valve 22, the connection between the pressure control channel 33 and the inner volume 31 of the piston area 28 is interrupted, since the piston area 28 rests in its piston seat 34 (see FIG. 3).
  • the throttle region 29 is formed in part by the outer contour of the piston region 28.
  • a connecting rod 35 is arranged in the throttle region 29, which connects the piston region 28 with the closure region 30.
  • the oil may flow around the connecting rod 35 because the cross section of the oil passage 21 is larger than the cross section of the connecting rod 35.
  • the shutter portion 30 is partially immersed in the spring seat 24 in the open position of the pressure regulating valve 22, thus releasing the oil passage 21 ,
  • the plug 36 is provided to close the receptacle in which the pressure regulating valve 22 is arranged.
  • the oil flow entering through the inlet 19 into the oil module has an oil pressure which is above the defined minimum oil pressure, therefore the piston region 28 is lifted off the piston seat 34 and the pressure control channel 33 is connected to the internal volume 31 of the piston region 28.
  • the pressure prevailing in the pressure control passage 33 oil pressure presses on the piston portion 28 and pushes the valve body 27 against the force of the valve spring 23 in a position in which the throttle portion 29 projects into the oil passage 21 and the oil can flow through the pressure control valve 22 to the outlet 20.
  • the closure region 30 is lifted off by a throttle bore 37 arranged in the housing 18 and the oil can flow through.
  • the oil enters inter alia in the pressure control passage 33, whereby the oil pressure contained in the pressure control passage 33 enters the inner volume 31 of the piston area 28 and controls the position of the valve body 27.
  • the pressure in the pressure control passage 33 acts on the piston area 28 such that the valve body 27 is pressed far against the valve spring 23.
  • the closure portion 30 dives far into the spring seat 24.
  • the throttle portion 29 is guided against the throttle bore 37, whereby a smaller amount of oil can pass through the throttle bore 37 therethrough. Since a smaller amount of oil after the pressure control valve 22 has a lower oil pressure result, the pressure control valve 22 opens the throttle bore 37 again somewhat. In this way, a constant pressure is generated by the pressure control valve 22 downstream, which is supplied through the outlet 20 to its intended use.
  • FIG. 3 shows the oil module 14 according to FIG. 2 in a section offset by 90 °. 2 corresponding components are provided with the same reference numerals.
  • the inlet 19 and the outlet 20 are located in front of and behind the illustrated sectional plane.
  • the pressure control valve 22 is shown in the closed position, in which the closure portion 30 of the valve body 27, the throttle bore 37 closes.
  • the oil passage 21 connected to the inlet (not shown) surrounds the shutter portion 30.
  • an ON / OFF channel 38 is disposed between the piston portion 28 of the valve body 27 and the oil passage 21, an ON / OFF channel 38 is disposed. In this ON / OFF channel 38 there is the same oil pressure as in the oil passage 21.
  • the piston portion 28 has openings 39 through which the oil from the ON / OFF channel 38 can penetrate into the internal volume 31 of the valve body 27.
  • a valve body 27 is shown in section.
  • the Figures 2 and 3 corresponding components are provided with the same reference numerals.
  • the individual levels A, B, C must be coordinated with one another in such a way that the pressure acting on the respective surface has the required effect.
  • the position of the apertures 39 is adapted to the housing 18 such that either the ON / OFF channel or the pressure control channel is connected to the internal volume 31 of the valve body.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Control Of Fluid Pressure (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

Liquid module (14) comprises an inlet (19) connected to an outlet (20) via a liquid channel (21), and a valve arranged in the liquid channel. The valve is a pressure-regulating valve (22) connected via an ON/OFF channel and a pressure-regulating channel (33) to the liquid channel. The pressure-regulating valve completely closes the liquid channel in a first position, and partly opens the liquid channel in a second position. In this second position the pressure-regulating valve can be adjusted into all intermediate positions. An Independent claim is also included for the production of constant liquid pressures in the above liquid module. Preferred Features: The pressure-regulating valve has a piston region (28) connected to the ON/OFF channel.

Description

Stand der TechnikState of the art

Die Erfindung betrifft ein Flüssigkeitsmodul, insbesondere ein Ölmodul für eine Brennkraftmaschine, zur Erzeugung eines Flüssigkeitsdruckes gemäß dem Oberbegriff des Anspruches 1. Weiterhin betrifft die Erfindung ein Verfahren zur Erzeugung konstanter Flüssigkeitsdrücke nach Anspruch 8.The invention relates to a fluid module, in particular an oil module for an internal combustion engine, for generating a fluid pressure according to the preamble of claim 1. Furthermore, the invention relates to a method for generating constant fluid pressures according to claim 8.

Es sind Ölmodule im Stand der Technik bekannt, welche zur Steuerung eines Öldrucks in einem Ölkreislauf zur Kühlung von Kolben einer Brennkraftmaschine vorgesehen sind. Hierbei dient das Öl als Kühlmittel und wird auf die zu kühlenden Kolben aufgespritzt. Der kühlende Ölstrahl muß jeden Kolben stets an der selben, zur Kühlung vorgesehenen Stelle treffen, um eine effektive Kühlung zu erzeugen. Daher muß der Öldruck in diesem Bereich des Ölkreislaufs konstant sein. Durch diverse Bauteile, wie z.B. die Ölpumpe werden, je nach Lastzustand unterschiedliche Drücke erzeugt. Damit der auf die Kolben auftreffende Ölstrahl nicht diesen Druckschwankungen ausgesetzt ist, sind in dem Ölmodul zwei Ventile angeordnet, welche die Druckdifferenzen ausgleichen. Das erste Ventil ist ein On/OFF-Ventil und das zweite Ventil ist ein Steuerventil. Der von der Ölpumpe erzeugte Öldruck liegt an diesem On/OFF-Ventil an. Sobald der von der Ölpumpe erzeugte Öldruck einen definierten Öldruck von z.B. 2,8bar überschreitet, öffnet dieses Ventil einen Durchlasskanal und läßt das Öl mit dem gesamten Öldruck zu dem Steuerventil strömen. Bei geringeren Öldrücken als der definierte Öldruck bleibt das ON/OFF-Ventil geschlossen, da in diesem Betriebszustand eine Kühlung der Kolben nicht erwünscht ist. Das Steuerventil ist in dem, von dem ON/OFF-Ventil kommenden Flüssigkeitskanal angeordnet und verfügt über einen Kolbenbereich und einen Drosselbereich. Der Kolbenbereich ist über einen Steuerkanal mit dem Flüssigkeitskanal verbunden. Somit herrscht an dem Kolbenbereich der gleiche Druck, wie in dem Flüssigkeitskanal. Übersteigt der Druck einen definierten Stelldruck, so wird der Kolben abgehoben und der Drosselbereich des Steuerventils reduziert die Querschnittsfläche des Flüssigkeitskanals, wodurch weniger Öl durch den Flüssigkeitskanal Strömen kann und der Öldruck nach dem Steuerventil somit auf den vorgegebenen Öldruck reduziert wird.There are oil modules known in the art, which are provided for controlling an oil pressure in an oil circuit for cooling piston of an internal combustion engine. Here, the oil serves as a coolant and is sprayed onto the piston to be cooled. The cooling oil jet must always hit each piston at the same cooling point to provide effective cooling. Therefore, the oil pressure in this area of the oil circuit must be constant. Various components, such as the oil pump, generate different pressures depending on the load condition. So that the oil jet impinging on the pistons is not exposed to these pressure fluctuations, two valves are arranged in the oil module, which compensate for the pressure differences. The first valve is an on / off valve and the second valve is a control valve. The oil pressure generated by the oil pump is applied to this on / off valve. As soon as the oil pressure generated by the oil pump exceeds a defined oil pressure of, for example, 2.8 bar, this valve opens a passage and allows the oil to flow with the total oil pressure to the control valve. At lower oil pressures than the defined oil pressure, the ON / OFF valve remains closed, since in this operating condition, a cooling of the piston is not desirable. The control valve is disposed in the fluid passageway coming from the ON / OFF valve and has a piston area and a throttle area. The piston area is connected to the fluid channel via a control channel. Thus, the same pressure prevails at the piston area as in the fluid channel. If the pressure exceeds a defined control pressure, the piston is lifted and the throttle area of the control valve reduces the cross-sectional area of the fluid channel, whereby less oil can flow through the fluid channel and the oil pressure after the control valve is thus reduced to the predetermined oil pressure.

Nachteilig bei dem bekannten Ölmodul sind die hohen Kosten für die beiden Ventile, sowie die aufwendige Montage der beiden Ventile in das Ölmodul.A disadvantage of the known oil module are the high cost of the two valves, as well as the complex installation of the two valves in the oil module.

Aufgabe der Erfindung ist somit die Reduzierung der Bauteilanzahl, sowie der Kosten. Diese Aufgabe wird durch die Merkmale des Anspruches 1 gelöst.The object of the invention is thus the reduction of the number of components, as well as the cost. This object is solved by the features of claim 1.

Vorteile der ErfindungAdvantages of the invention

Die Erfindung betrifft ein Flüssigkeitsmodul gemäß Anspruch 1 und ein Verfahren gemäβ Anspruch 8.The invention relates to a liquid module according to claim 1 and a method according to claim 8.

Das erfindungsgemäße Flüssigkeitsmodul dient zur Erzeugung von konstanten Flüssigkeitsdrücken in Flüssigkeitssystemen. Derartige Flüssigkeitsmodule können z.B. in Kraftstoff-/ Wasserleitungen oder in Ölkreisläufen eingesetzt werden, in denen konstante Drücke erforderlich sind, hierbei stellt die Verwendung des Flüssigkeitsmoduls in der Kolbenkühlung von Brennkraftmaschinen eine besondere Verwendung dar. Das Flüssigkeitsmodul weist einen Einlass, durch welchen die Flüssigkeit in das Flüssigkeitsmodul eintritt und einen Auslass, durch welchen die Flüssigkeit aus dem Flüssigkeitsmodul austritt auf. Der Einlass ist über einen Flüssigkeitskanal mit dem Auslass korrespondierend verbunden. In dem Flüssigkeitskanal ist ein Ventil angeordnet, wobei das Ventil ein Druckregelventil ist. In einer ersten Stellung verschließt das Druckregelventil den Flüssigkeitskanal vollständig. Diese erste Stellung nimmt das Druckregelventil ein, wenn der Flüssigkeitsdruck unter einem definierten Flüssigkeitsdruck liegt. Der definierte Flüssigkeitsdruck ist abhängig von dem in dem Flüssigkeitssystem erforderlichen Flüssigkeitsdruck. Er kann z.B. bei der Kolbenkühlung 2,8bar betragen, wobei dieser Druck konstant sein muß und den Kolben effektiv zu kühlen. Unterhalb des definierten Flüssigkeitsdruckes muss das Druckregelventil geschlossen sein, da sonst das Flüssigkeitssystem nicht korrekt funktioniert. Bei der Kolbenkühlung z.B. würde der Ölstrahl den Kolben an einer zur Kühlung nicht geeigneten Stelle treffen, wodurch ein hoher Ölverlust ohne effektive Kühlung oder sogar eine Beschädigung des Kolbens die Folge wären. Wenn der Flüssigkeitsdruck den definierten Flüssigkeitsdruck überschreitet öffnet das Druckregelventil in einer zweiten Stellung den Flüssigkeitskanal und lässt die Flüssigkeit zumindest teilweise zu dem Auslass strömen. Diese zweite Stellung kann jede Zwischenstellung einnehmen, bei der Flüssigkeit über das Druckregelventil strömen kann.The liquid module according to the invention serves to generate constant liquid pressures in liquid systems. Such liquid modules may e.g. used in fuel / water pipes or in oil circuits in which constant pressures are required, in which case the use of the liquid module in the piston cooling of internal combustion engines is a particular use. The liquid module has an inlet through which the liquid enters the liquid module and a Outlet through which the liquid emerges from the liquid module on. The inlet is connected via a fluid channel corresponding to the outlet. In the liquid channel, a valve is arranged, wherein the valve is a pressure regulating valve. In a first position, the pressure control valve completely closes the fluid channel. This first position assumes the pressure control valve when the fluid pressure is below a defined fluid pressure. The defined fluid pressure is dependent on the fluid pressure required in the fluid system. He can e.g. be 2.8 bar in the case of the piston cooling, this pressure must be constant and to cool the piston effectively. Below the defined fluid pressure, the pressure control valve must be closed, otherwise the fluid system will not work properly. In the case of piston cooling, e.g. For example, the jet of oil would hit the piston at a location unsuitable for cooling, resulting in high oil loss without effective cooling or even piston damage. When the fluid pressure exceeds the defined fluid pressure, the pressure regulating valve in a second position opens the fluid channel and allows the fluid to flow at least partially to the outlet. This second position can take any intermediate position in which liquid can flow through the pressure control valve.

Das Druckregelventil ist über einen ON/OFF-Kanal und einen Druckregelkanal mit dem Flüssigkeitskanal verbunden. Der ON/OFF-Kanal ist anströmseitig mit dem Druckregelventil verbunden. In diesem ON/OFF-Kanal herrscht der Flüssigkeitsdruck, welcher durch den Einlass in das Flüssigkeitsmodul eintritt. Der Druckregelkanal ist abströmseitig mit dem Druckregelventil verbunden. In diesem Druckregelkanal liegt nur dann ein Flüssigkeitsdruck an, wenn der Flüssigkeitsdruck in dem ON/OFF-Kanal den definierten Flüssigkeitsdruck überschreitet. Der in dem Druckregelkanal anliegende Flüssigkeitsdruck kann maximal den, in dem ON/OFF-Kanal herrschenden Druck erreichen, wobei der in dem Druckregelkanal herrschende Flüssigkeitsdruck jedoch meistens geringer ist. Bei dem erfindungsgemäßen Flüssigkeitsmodul erfüllt das Druckregelventil die Funktion eines ON/OFF-Ventils und die Funktion eines Steuerventils, somit ist die Anzahl der für die Funktion des Flüssigkeitsmoduls erforderlichen Bauteile reduziert. Weiterhin verringert sich der Montageaufwand, da nur ein einziges Ventil montiert werden muss. In das Flüssigkeitsmodul können noch weitere Bauteile wie z.B. Flüssigkeitsfilter oder Flüssigkeitskühler integriert sein. Die Flüssigkeitsfilter können vor oder nach dem Druckregelventil angeordnet sein und entfernen Verunreinigungen aus der Flüssigkeit. Die Flüssigkeitskühler können ebenfalls vor oder nach dem Druckregelventil angeordnet sein, wobei sie die Temperatur der Flüssigkeit auf eine definierte Temperatur reduzieren können. Die Flüssigkeitsfilter können als Wechselpatrone ausgebildet sein, welche über ein Filtergehäuse verfügt das z.B. an das Gehäuse angeschraubt werden kann. Es sind jedoch auch Ausgestaltungen denkbar, bei denen das Flüssigkeitsmodul über ein öffenbares Volumen verfügt, in welches ein Filterelement eingesetzt werden kann.The pressure regulating valve is connected to the fluid channel via an ON / OFF channel and a pressure regulating channel. The ON / OFF channel is connected upstream of the pressure regulating valve. In this ON / OFF channel, the fluid pressure that enters the fluid module through the inlet prevails. The pressure control channel is downstream with connected to the pressure control valve. In this pressure control channel, a fluid pressure is present only when the fluid pressure in the ON / OFF channel exceeds the defined fluid pressure. The applied in the pressure control channel fluid pressure can reach the maximum, prevailing in the ON / OFF channel pressure, the pressure prevailing in the pressure control channel fluid pressure is usually less. In the liquid module according to the invention, the pressure regulating valve fulfills the function of an ON / OFF valve and the function of a control valve, thus the number of components required for the function of the liquid module is reduced. Furthermore, the assembly effort is reduced because only a single valve must be mounted. In the liquid module other components such as liquid filter or liquid cooler can be integrated. The liquid filters may be arranged before or after the pressure regulating valve and remove impurities from the liquid. The liquid coolers can also be arranged before or after the pressure regulating valve, wherein they can reduce the temperature of the liquid to a defined temperature. The liquid filter can be designed as a removable cartridge, which has a filter housing which can be screwed to the housing, for example. However, embodiments are also conceivable in which the liquid module has an openable volume into which a filter element can be inserted.

Gemäß einer vorteilhaften Ausgestaltung der Erfindung verfügt das Druckregelventil über einen Kolbenbereich, der mit dem On/OFF-Kanal verbunden ist. Der Kolbenbereich ist derart gestaltet, dass der in dem ON/OFF-Kanal herrschende Flüssigkeitsdruck bei überschreiten des definierten Flüssigkeitsdruckes den Kolbenbereich des Druckregelventils von seinem Kolbensitz zuverlässig abhebt. Hierbei kann der Kolbenbereich über mehrere Flächenbereiche verfügen, welche nacheinander in Kontakt mit der Flüssigkeit und dem Flüssigkeitsdruck kommen. Dadurch kann das Druckregelventil in Abhängigkeit des Flüssigkeitsdruckes eine vordefinierte Bewegung ausführen.According to an advantageous embodiment of the invention, the pressure regulating valve has a piston area which is connected to the on / off channel. The piston area is designed in such a way that the fluid pressure prevailing in the ON / OFF channel reliably lifts the piston area of the pressure regulating valve from its piston seat when the defined fluid pressure is exceeded. In this case, the piston region can have a plurality of surface regions which come into contact with the liquid and the liquid pressure one after the other. As a result, the pressure regulating valve can perform a predefined movement as a function of the fluid pressure.

Eine Weiterbildung der Erfindung sieht vor, dass der Kolbenbereich des Druckregelventils über ein Innenvolumen verfügt, welches über einen Durchbruch mit dem ON/OFF-Kanal verbindbar ist. Der Durchbruch ist in der das Innenvolumen begrenzenden Wand angeordnet, wobei der Durchbruch am Umfang oder in den Stirnseiten angeordnet sein kann. Durch den Durchbruch gelangt die Flüssigkeit in das Innere des Kolbenbereiches wodurch der Flüssigkeitsdruck in dem Innenvolumen des Kolbenbereiches keinen Strömungen ausgesetzt ist und somit keinen Störfaktoren ausgesetzt ist. Somit wirkt allein der herrschende Flüssigkeitsdruck auf den Kolbenbereich, was eine exaktere Druckerfassung ermöglicht. Das Innenvolumen des Kolbenbereiches kann beliebig gestaltet sein, wobei vorteilhafte Ausgestaltungen eine zylindrische oder quaderförmige Ausgestaltung vorsehen.A development of the invention provides that the piston region of the pressure regulating valve has an internal volume which can be connected via an opening to the ON / OFF channel. The breakthrough is arranged in the wall bounding the inner volume, wherein the breakthrough may be arranged on the circumference or in the end faces. As a result of the breakthrough, the liquid enters the interior of the piston area, as a result of which the fluid pressure in the interior volume of the piston area is not exposed to any flow and is therefore not exposed to any disturbing factors. Thus, only the prevailing fluid pressure acts on the piston area, which allows a more accurate pressure detection. The inner volume of the piston area can be designed arbitrarily, wherein advantageous embodiments provide a cylindrical or cuboid configuration.

Es ist vorteilhaft, dass das Druckregelventil einen Drosselbereich aufweist, wobei der Flüssigkeitskanal in einem Teilbereich seines Querschnitts durch den Drosselbereich veränderbar ist. Der Drosselbereich verfügt teilweise über einen geringeren Querschnitt, als der ihn umschließende Kanal. Dieser geringere Querschnitt kann z.B. zylindrische, keglige oder sonstige Formen aufweisen. In seinem Endbereich verfügt der Drosselbereich über einen Verschluß, der den ihn umschließenden Kanal vollständig verschließen kann. Durch den Drosselbereich ist die Durchflussmenge der Flüssigkeit zu regeln, wodurch dann auch der durch den Auslass austretende Druck eingestellt werden kann.It is advantageous that the pressure regulating valve has a throttle region, wherein the liquid channel is variable in a partial region of its cross section through the throttle region. Part of the throttle area has a smaller cross section than the channel surrounding it. This smaller cross section may e.g. cylindrical, conical or other shapes. In its end region, the throttle region has a closure which can completely close the channel surrounding it. Through the throttle area, the flow rate of the liquid to regulate, which can then also be adjusted by the outlet pressure exiting.

Weitere Ausgestaltungen sehen vor, dass das Innenvolumen des Kolbenbereiches über einen Durchlass mit dem Druckregelkanal verbindbar ist. Dieser Durchlass kann am Umfang oder in den Stirnseiten des Kolbenbereiches angeordnet sein.Further embodiments provide that the internal volume of the piston area can be connected via a passage to the pressure regulating channel. This passage can be arranged on the circumference or in the end faces of the piston area.

Es ist vorteilhaft, dass das Innenvolumen des Kolbenbereiches in einer ersten Stellung ausschließlich mit dem ON/OFF-Kanal und in einer zweiten Stellung ausschließlich mit dem Druckregelkanal kommunizierend verbunden ist. Dadurch wirkt entweder der Flüssigkeitsdruck des ON/OFF-Kanals oder der Flüssigkeitsdruck des Druckregelkanals auf den Kolbenbereich, wodurch definierte Druckverhältnisse gegeben sind. Weiterhin wird eine Trennung des ON/OFF-Kanals von dem Druckregelkanal beibehalten, wodurch kein By-pass der Flüssigkeit an dem Drosselbereich vorbei verursacht wird.It is advantageous that the inner volume of the piston area is connected in a first position exclusively with the ON / OFF channel and in a second position exclusively communicating with the pressure control channel. As a result, either the fluid pressure of the ON / OFF channel or the fluid pressure of the pressure control channel acts on the piston area, whereby defined pressure conditions are given. Furthermore, a separation of the ON / OFF channel is maintained by the pressure control channel, whereby no by-pass of the liquid is caused by the throttle region over.

Eine weitere Ausgestaltung des erfindungsgemäßen Flüssigkeitsmoduls sieht vor, dass der Drosselbereich des Druckregelventils an den Kolbenbereich anschließt und dass das Druckregelventil ein Kolbensitzbereich aufweist, welcher einen Endbereich des Druckregelventils definiert.A further embodiment of the liquid module according to the invention provides that the throttling region of the pressure regulating valve adjoins the piston region and that the pressure regulating valve has a piston seat region which defines an end region of the pressure regulating valve.

Für das erfindungsgemäße Verfahren zur Erzeugung von konstanten Flüssigkeitsdrücken in einem Flüssigkeitsmodul ist ein Druckregelventil vorgesehen. Bei einem Flüssigkeitsdruck, welcher geringer ist, als der definierte Flüssigkeitsmindestdruck bleibt dass Druckregelventil geschlossen. Hierzu ist das Druckregelventil über einen ON/OFF-Kanal mit der vom Einlass kommenden Flüssigkeitsleitung verbunden. Sobald der durch den Einlass in das Flüssigkeitsmodul eintretende Flüssigkeitsdruck größer ist, als der definierte Flüssigkeitsmindestdruck öffnet das Druckregelventil zumindest teilweise eine Drosselbohrung, wodurch zumindest Teile der Flüssigkeit an dem Druckregelventil vorbei in Richtung Auslass strömen können. Hierbei dringt die Flüssigkeit in einen Druckregelkanal ein, welcher ebenfalls mit dem Druckregelventil verbunden ist. In Abhängigkeit des in dem Druckregelkanal herrschenden Flüssigkeitsdruckes stellt das Druckregelventil die zulässige Durchflussmenge der Flüssigkeit ein. Bei hohen Drücken öffnet das Druckregelventil nur einen kleinen Querschnitt und bei Drücken, welche nur wenig über dem Mindestflüssigkeitsdruck liegen, öffnet das Druckregelventil einen größeren Querschnitt. Somit liegt bei geöffnetem Druckregelventil am Auslass stets der gleiche Flüssigkeitsdruck an.For the inventive method for generating constant fluid pressures in a liquid module, a pressure regulating valve is provided. At a liquid pressure which is lower than the defined minimum liquid pressure, the pressure regulating valve remains closed. For this purpose, the pressure regulating valve is connected via an ON / OFF channel with the liquid line coming from the inlet. As soon as the liquid pressure entering through the inlet into the liquid module is greater than the defined minimum liquid pressure, the pressure regulating valve at least partially opens a throttle bore, whereby at least parts of the liquid can flow past the pressure regulating valve in the direction of the outlet. In this case, the liquid penetrates into a pressure control channel a, which is also connected to the pressure control valve. Depending on the pressure prevailing in the pressure control channel fluid pressure, the pressure control valve adjusts the permissible flow rate of the liquid. At high pressures, the pressure regulating valve opens only a small cross section and at pressures which are only slightly above the minimum liquid pressure, the pressure regulating valve opens a larger cross section. Thus, when the pressure control valve is open, the same fluid pressure is always present at the outlet.

Zeichnungdrawing

Weitere Einzelheiten der Erfindung werden in der Zeichnung anhand von schematischen Ausführungsbeispielen beschrieben. Hierbei zeigt

Figur 1
einen schematischen Ölkreislauf,
Figur 2
einen Ausschnitt aus einem Ölmodul im Schnitt,
Figur 3
einen um 90° versetzten Schnitt durch das Ölmodul gemäß Figur 2 und
Figur 4
einen Ventilkörper im Schnitt.
Further details of the invention are described in the drawing with reference to schematic embodiments. This shows
FIG. 1
a schematic oil circuit,
FIG. 2
a section of an oil module in section,
FIG. 3
a 90 ° offset section through the oil module according to Figure 2 and
FIG. 4
a valve body in section.

Beschreibung der AusführungsbeispieleDescription of the embodiments

In Figur 1 ist ein Ölkreislauf schematisch dargestellt. Der Ölkreislauf, welcher zur Kühlung von Kolben10 einer Brennkraftmaschine 11 vorgesehen ist, weist eine Ölwanne 12, eine Ölpumpe 13 und ein Ölmodul 14 auf. Die Ölpumpe 13 fördert Öl aus der Ölwanne 12 zu dem Ölmodul 14, wobei die Ölpumpe selbstverständlich auch in der Ölwanne 12 angeordnet sein kann. Durch diverse Einflüsse fördert die Ölpumpe 13 mehr oder weniger Öl aus der Ölwanne 12, wodurch der Öldruck in einer, die Ölpumpe 13 mit dem Ölmodul 14 verbindenden Ölleitung 15 nicht konstant ist. Das Ölmodul 14 reguliert den Öldruck und führt dem Kolben 10 der Brennkraftmaschine 11 über die Zuleitung 16 Öl mit einem konstanten Öldruck von z.B. 2,8bar zu. Das Öl wird auf die Kolben 10 gespritzt, um die Temperatur in den Kolben 10 zu reduzieren. Nach dem das Öl die Kolben 10 gekühlt hat, läuft das Öl aus der Brennkraftmaschine 11 heraus und wird über eine Rückleitung 17 der Ölwanne 12 wieder zugeführt. Hierbei kann das Öl selbstverständlich über einen Ölkühler (nicht dargestellt) geleitet werden, um das Öl in der Ölwanne 12 nicht aufzuheizen.In Figure 1, an oil circuit is shown schematically. The oil circuit, which is provided for cooling piston 10 of an internal combustion engine 11, has an oil pan 12, an oil pump 13 and an oil module 14. The oil pump 13 delivers oil from the oil pan 12 to the oil module 14, wherein the oil pump can of course also be arranged in the oil pan 12. By various influences, the oil pump 13 promotes more or less oil from the oil pan 12, whereby the oil pressure in one, the oil pump 13 to the oil module 14 connecting oil line 15 is not constant. The oil module 14 regulates the oil pressure and leads the piston 10 of the internal combustion engine 11 via the supply line 16 oil at a constant Oil pressure of eg 2.8 bar too. The oil is injected onto the pistons 10 to reduce the temperature in the pistons 10. After the oil has cooled the piston 10, the oil runs out of the internal combustion engine 11 and is supplied via a return line 17 of the oil pan 12 again. In this case, the oil can of course be passed through an oil cooler (not shown) so as not to heat the oil in the oil pan 12.

In Figur 2 ist ein Ausschnitt von einem Ölmodul 14 im Schnitt dargestellt. Das Ölmodul 14 besitzt ein Gehäuse 18 welches über einen Einlass 19 und einen Auslass 20 verfügt. Der Einlass 19 ist über einen Ölkanal 21 mit dem Auslass 20 verbunden. Zwischen dem Einlass 19 und dem Auslass 20 ist ein Druckregelventil 22 in dem Ölkanal 21 angeordnet, wobei das Druckregelventil 22 in der OFFEN-Stellung dargestellt ist. Das Druckregelventil 22 ist durch einen Ventilkörper 27 und eine spiralförmige Ventilfeder 23 gebildet. Die Ventilfeder 23 ist bei geöffneter Stellung komprimiert, da der Ventilkörper 27 auf die Ventilfeder 23 drückt. Anstelle der Ventilfeder 23 könnten auch andere Bauteile wie z.B. Schaumstoffe oder Elastomere verwendet werden, welche die Aufgaben der Ventilfeder 23 ebenfalls erfüllen könnten. Die Ventilfeder 23 ist in einem Federsitz 24 angeordnet, wobei der Federsitz 24 mit einem Stopfen 25 verschlossen ist. Weiterhin verfügt der Federsitz 24 über eine Entlüftungsbohrung 26, durch welche Luft aus dem Federsitz 24 entweichen oder einströmen kann, wenn der Ventilkörper 27 bewegt wird. Der Ventilkörper 27 besitzt einen Kolbenbereich 28, einen Drosselbereich 29 und einen Verschlußbereich 30. Der Kolbenbereich 28 verfügt über ein zylindrisches Innenvolumen 31, welches im geöffneten Zustand über einen Durchlass 32 an seiner Stirnseite mit einem Druckregelkanal 33 verbunden ist. In der Geschlossen-Stellung des Druckregelventils 22 ist die Verbindung zwischen dem Druckregelkanal 33 und dem Innenvolumen 31 des Kolbenbereiches 28 unterbrochen, da der Kolbenbereich 28 in seinem Kolbensitz 34 anliegt (siehe Figur 3). Der Drosselbereich 29 wird zum Teil durch die Außenkontur des Kolbenbereiches 28 gebildet. Weiterhin ist in dem Drosselbereich 29 eine Verbindungsstange 35 angeordnet, welche den Kolbenbereich 28 mit dem Verschlußbereich 30 verbindet. Das Öl kann um die Verbindungsstange 35 herum strömen, da der Querschnitt des Ölkanals 21 größer ist, als der Querschnitt der Verbindungsstange 35. Der Verschlußbereich 30 ist bei der geöffneten Stellung des Druckregelventils 22 teilweise in den Federsitz 24 eingetaucht und gibt somit den Ölkanal 21 frei. Aus fertigungstechnischen Gründen ist der Pfropfen 36 vorgesehen, um die Aufnahme, in welcher das Druckregelventil 22 angeordnet ist zu verschließen. Somit ist für den Federsitz 24 und die Aufnahme für das Druckregelventil 22 eine einzige durchgehende Bohrung vorzusehen, welche einfach herstellbar ist.FIG. 2 shows a section of an oil module 14 in section. The oil module 14 has a housing 18 which has an inlet 19 and an outlet 20. The inlet 19 is connected to the outlet 20 via an oil passage 21. Between the inlet 19 and the outlet 20, a pressure regulating valve 22 is disposed in the oil passage 21, the pressure regulating valve 22 being shown in the OPEN position. The pressure regulating valve 22 is formed by a valve body 27 and a helical valve spring 23. The valve spring 23 is compressed in the open position, since the valve body 27 presses on the valve spring 23. Instead of the valve spring 23, other components such as foams or elastomers could be used, which could also fulfill the tasks of the valve spring 23. The valve spring 23 is arranged in a spring seat 24, wherein the spring seat 24 is closed by a plug 25. Furthermore, the spring seat 24 has a vent hole 26 through which air can escape from the spring seat 24 or flow when the valve body 27 is moved. The valve body 27 has a piston region 28, a throttling region 29 and a closure region 30. The piston region 28 has a cylindrical inner volume 31, which in the opened state is connected via a passage 32 on its end face to a pressure regulating channel 33. In the closed position of the pressure control valve 22, the connection between the pressure control channel 33 and the inner volume 31 of the piston area 28 is interrupted, since the piston area 28 rests in its piston seat 34 (see FIG. 3). The throttle region 29 is formed in part by the outer contour of the piston region 28. Furthermore, a connecting rod 35 is arranged in the throttle region 29, which connects the piston region 28 with the closure region 30. The oil may flow around the connecting rod 35 because the cross section of the oil passage 21 is larger than the cross section of the connecting rod 35. The shutter portion 30 is partially immersed in the spring seat 24 in the open position of the pressure regulating valve 22, thus releasing the oil passage 21 , For manufacturing reasons, the plug 36 is provided to close the receptacle in which the pressure regulating valve 22 is arranged. Thus, for the spring seat 24 and the receptacle for the pressure control valve 22 to provide a single through hole, which is easy to produce.

Der durch den Einlass 19 in das Ölmodul eintretende Ölstrom besitzt einen Öldruck, welcher über dem definierten Mindestöldruck liegt, daher ist der Kolbenbereich 28 von dem Kolbensitz 34 abgehoben und der Druckregelkanal 33 mit dem Innenvolumen 31 des Kolbenbereiches 28 verbunden. Der in dem Druckregelkanal 33 herrschende Öldruck drückt auf den Kolbenbereich 28 und schiebt den Ventilkörper 27 gegen die Kraft der Ventilfeder 23 in eine Stellung in welcher der Drosselbereich 29 in den Ölkanal 21 ragt und so das Öl über das Druckregelventil 22 zum Auslass 20 strömen kann. Bei geringen Öldrücken, welche jedoch oberhalb des definierten Mindestöldruckes liegen, wird der Verschlußbereich 30 von einer in dem Gehäuse 18 angeordneten Drosselbohrung 37 abgehoben und das Öl kann hindurchströmen. Dadurch tritt das Öl unter anderem in den Druckregelkanal 33 ein, wodurch der in dem Druckregelkanal 33 enthaltene Öldruck in das Innenvolumen 31 des Kolbenbereiches 28 gelangt und die Stellung des Ventilkörpers 27 regelt. Bei sehr hohen Drücken wirkt der Druck in dem Druckregelkanal 33 derart auf den Kolbenbereich 28, dass der Ventilkörper 27 weit gegen die Ventilfeder 23 gedrückt wird. Dadurch taucht der Verschlußbereich 30 weit in den Federsitz 24 ein. Weiterhin wird der Drosselbereich 29 gegen die Drosselbohrung 37 geführt, wodurch eine geringere Ölmenge durch die Drosselbohrung 37 hindurch treten kann. Da eine geringere Ölmenge nach dem Druckregelventil 22 einen geringeren Öldruck zur Folge hat, öffnet das Druckregelventil 22 die Drosselbohrung 37 wieder etwas weiter. Auf diese Weise wird durch das Druckregelventil 22 abströmseitig ein konstanter Druck erzeugt, welcher durch den Auslass 20 seinem Verwendungszweck zugeführt wird.The oil flow entering through the inlet 19 into the oil module has an oil pressure which is above the defined minimum oil pressure, therefore the piston region 28 is lifted off the piston seat 34 and the pressure control channel 33 is connected to the internal volume 31 of the piston region 28. The pressure prevailing in the pressure control passage 33 oil pressure presses on the piston portion 28 and pushes the valve body 27 against the force of the valve spring 23 in a position in which the throttle portion 29 projects into the oil passage 21 and the oil can flow through the pressure control valve 22 to the outlet 20. At low oil pressures, which, however, are above the defined minimum oil pressure, the closure region 30 is lifted off by a throttle bore 37 arranged in the housing 18 and the oil can flow through. As a result, the oil enters inter alia in the pressure control passage 33, whereby the oil pressure contained in the pressure control passage 33 enters the inner volume 31 of the piston area 28 and controls the position of the valve body 27. At very high pressures, the pressure in the pressure control passage 33 acts on the piston area 28 such that the valve body 27 is pressed far against the valve spring 23. As a result, the closure portion 30 dives far into the spring seat 24. Furthermore, the throttle portion 29 is guided against the throttle bore 37, whereby a smaller amount of oil can pass through the throttle bore 37 therethrough. Since a smaller amount of oil after the pressure control valve 22 has a lower oil pressure result, the pressure control valve 22 opens the throttle bore 37 again somewhat. In this way, a constant pressure is generated by the pressure control valve 22 downstream, which is supplied through the outlet 20 to its intended use.

In Figur 3 ist das Ölmodul 14 gemäß Figur 2 in einem um 90° versetzten Schnitt dargestellt. Der Figur 2 entsprechende Bauteile sind mit gleichen Bezugszeichen versehen. Der Einlass 19 und der Auslass 20 liegen vor bzw. hinter der dargestellten Schnittebene. Das Druckregelventil 22 ist in der Geschlossen-Stellung dargestellt, bei welcher der Verschlußbereich 30 des Ventilkörpers 27 die Drosselbohrung 37 verschließt. Der mit dem Einlass (nicht dargestellt) verbundene Ölkanal 21 umgibt den Verschlußbereich 30. Zwischen dem Kolbenbereich 28 des Ventilkörpers 27 und dem Ölkanal 21 ist ein ON/OFF-Kanal 38 angeordnet. In diesem ON/OFF-Kanal 38 herrscht der gleiche Öldruck, wie in dem Ölkanal 21. Der Kolbenbereich 28 verfügt über Durchbrüche 39, durch welche das Öl von dem ON/OFF-Kanal 38 in das Innenvolumen 31 des Ventilkörpers 27 eindringen kann. Wenn der Öldruck in dem Innenvolumen 31 größer als ein vordefinierter Mindestöldruck ist, ist die Druckkraft in dem Kolbenbereich 28 größer als die Gegenkraft der Ventilfeder 23, wodurch das Druckregelventil 22 geöffnet wird. Der definierte Mindestöldruck ist durch die Vorspannung und Auslegung der Ventilfeder einzustellen. Sobald das Druckregelventil 22 öffnet, verschiebt sich der Ventilkörper 27 axial nach unten. Dadurch werden die Durchbrüche 39, welche das Innenvolumen 31 mit dem ON/OFF-Kanal 38 verbinden verschlossen und die Drosselbohrung 37 von dem Verschlußbereich 30 frei gegeben. Das Öl kann nun an dem Druckregelventil 22 vorbeiströmen (strichpunktiert dargestellt). Sobald der Druck in dem Ölkanal 21 unter den definierten Öldruck sinkt, fällt auch der Öldruck in dem Druckregelkanal 33 ab. Dadurch nimmt der Druck auch in dem Innenvolumen 31 ab und durch die Federkraft der Ventilfeder 23 wird der Ventilkörper 27 gegen den Kolbensitz 34 gedrückt. Dadurch wird der Durchlass 32 zwischen dem Druckregelkanal 33 und dem Innenvolumen 31 wieder verschlossen und die Durchbrüche 39, welche den ON/OFF-Kanal 38 mit dem Innenvolumen 31 verbinden, wieder geöffnet.FIG. 3 shows the oil module 14 according to FIG. 2 in a section offset by 90 °. 2 corresponding components are provided with the same reference numerals. The inlet 19 and the outlet 20 are located in front of and behind the illustrated sectional plane. The pressure control valve 22 is shown in the closed position, in which the closure portion 30 of the valve body 27, the throttle bore 37 closes. The oil passage 21 connected to the inlet (not shown) surrounds the shutter portion 30. Between the piston portion 28 of the valve body 27 and the oil passage 21, an ON / OFF channel 38 is disposed. In this ON / OFF channel 38 there is the same oil pressure as in the oil passage 21. The piston portion 28 has openings 39 through which the oil from the ON / OFF channel 38 can penetrate into the internal volume 31 of the valve body 27. When the oil pressure in the inner volume 31 is greater than a predetermined minimum oil pressure, the pressing force in the piston portion 28 is greater than the counterforce of the valve spring 23, whereby the pressure regulating valve 22 is opened. The defined minimum oil pressure must be set by the preload and design of the valve spring. As soon as that Pressure control valve 22 opens, the valve body 27 moves axially downward. Thereby, the openings 39, which connect the inner volume 31 with the ON / OFF channel 38 are closed and the throttle bore 37 is released from the closure portion 30. The oil can now flow past the pressure control valve 22 (shown in phantom). As soon as the pressure in the oil passage 21 drops below the defined oil pressure, the oil pressure in the pressure regulating passage 33 also drops. As a result, the pressure also decreases in the inner volume 31 and by the spring force of the valve spring 23, the valve body 27 is pressed against the piston seat 34. As a result, the passage 32 between the pressure control channel 33 and the inner volume 31 is closed again and the openings 39, which connect the ON / OFF channel 38 with the inner volume 31, reopened.

In Figur 4 ist ein Ventilkörper 27 im Schnitt dargestellt. Die den Figuren 2 und 3 entsprechende Bauteile sind mit gleichen Bezugszeichen versehen. Die einzelnen Ebenen A, B, C müssen derart aufeinander abgestimmt sein, dass der auf die jeweilige Fläche wirkende Druck die geforderte Wirkung hat. Weiterhin ist die Lage der Durchbrüche 39 derart auf das Gehäuse 18 abzustimmen, dass entweder der ON/OFF-Kanal oder der Druckregelkanal mit dem Innenvolumen 31 des Ventilkörpers verbunden ist.In Figure 4, a valve body 27 is shown in section. The Figures 2 and 3 corresponding components are provided with the same reference numerals. The individual levels A, B, C must be coordinated with one another in such a way that the pressure acting on the respective surface has the required effect. Furthermore, the position of the apertures 39 is adapted to the housing 18 such that either the ON / OFF channel or the pressure control channel is connected to the internal volume 31 of the valve body.

Claims (8)

  1. Liquid module (14) for creating constant liquid pressures, more especially an oil module to create a constant oil pressure for the cooling of an internal combustion engine, said liquid module including an inlet (19) and an outlet (20),
    - wherein the inlet (19) is connected in a corresponding manner to the outlet (20) via a liquid duct (21),
    - wherein a valve is disposed in the liquid duct (21),
    characterised in that the valve is a pressure regulating valve (22), which is connected to the liquid duct (21) via an ON/OFF duct (38) and a pressure regulating duct (33), wherein the ON/OFF duct (38) is connected to a surface of the pressure regulating valve (22) on the incoming side and the pressure duct (33) is connected to the same surface of the pressure regulating valve (22) on the outgoing side and the pressure regulating valve (22)
    - closes the liquid duct (21) completely in a first position if the liquid pressure is below a defined liquid pressure and
    - opens the liquid duct (21) partially in a second position if the liquid pressure is above a defined liquid pressure, wherein in this second position the pressure regulating valve (22) can be adjusted into all intermediate positions.
  2. Liquid module (14), according to claim 1, characterised in that the pressure regulating valve (22) has a piston region (28), which is connected to the ON/OFF duct (38).
  3. Liquid module (14) according to claim 2, characterised in that the piston region (28) has an internal volume (31), which is connectable to the ON/OFF duct (38) via an opening (36).
  4. Liquid module (14) according to one of the preceding claims, characterised in that the pressure regulating valve (22) includes a throttle region (29), wherein the cross-section of the liquid duct (21) is modifiable by the throttle region (29).
  5. Liquid module (14) according to claim 3 or to claim 4 when dependent on claim 3, characterised in that the internal volume (31) of the piston region (28) is connectable to the pressure regulating duct (33) via a passage (32).
  6. Liquid module (14) according to a claim when dependent on claim 3, characterised in that in the first position the internal volume (31) of the piston region (28) is correspondingly connected exclusively to the ON/OFF duct (38) and in the second position is correspondingly connected exclusively to the pressure regulating duct (33).
  7. Liquid module (14) according to at least claims 4 to 6 when dependent on claim 2, characterised in that the throttle region (29) of the pressure regulating valve (22) abuts against the piston region (28) and in that the pressure regulating valve (22) includes a piston seat region (34), which defines an end position of the pressure regulating valve.
  8. Method for creating constant liquid pressures in a liquid module (14) in accordance with one of the preceding claims, characterised in that
    - a pressure regulating valve (22) is disposed in a liquid duct (21), wherein a surface of the pressure regulating valve (22) is connected on the incoming side to an ON/OFF duct and the same surface of the pressure regulating valve (22) is connected on the outgoing side to a pressure regulating duct (33),
    - the pressure regulating valve (22) closes the liquid duct (21) completely when liquid pressures are below a defined liquid pressure,
    - the pressure regulating valve (22) opens the liquid duct at least partially when liquid pressures are above the defined liquid pressure, wherein the opening of the liquid duct (21) is effected in dependence on the liquid pressure present, wherein the pressure regulating valve (22) continues to opens the cross-section of the liquid duct (21) if the liquid pressures are only a little above the defined liquid pressure and only opens the cross-section of the liquid duct (21) a little if the liquid pressures are far above the defined liquid pressure.
EP03104157A 2002-11-15 2003-11-12 Fluid module for delivering constant pressure fluid Expired - Lifetime EP1420148B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10253576A DE10253576A1 (en) 2002-11-15 2002-11-15 fluid module
DE10253576 2002-11-15

Publications (3)

Publication Number Publication Date
EP1420148A2 EP1420148A2 (en) 2004-05-19
EP1420148A3 EP1420148A3 (en) 2005-06-01
EP1420148B1 true EP1420148B1 (en) 2006-05-31

Family

ID=32115560

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03104157A Expired - Lifetime EP1420148B1 (en) 2002-11-15 2003-11-12 Fluid module for delivering constant pressure fluid

Country Status (4)

Country Link
EP (1) EP1420148B1 (en)
AT (1) ATE328193T1 (en)
DE (2) DE10253576A1 (en)
ES (1) ES2263917T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005050063A1 (en) * 2005-10-19 2007-04-26 Bayerische Motoren Werke Ag Pressure control unit
CN115163242A (en) * 2022-07-22 2022-10-11 中车戚墅堰机车有限公司 Novel engine oil regulating valve

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB593035A (en) * 1945-02-01 1947-10-07 Aspin Frank Metcalfe Improvements in or relating to lubrication systems of internal combustion engines
US2072180A (en) * 1933-11-13 1937-03-02 Packard Motor Car Co Internal combustion engine
GB1087974A (en) * 1964-11-10 1967-10-18 Continental Aviat & Eng Corp Improvements in fuel systems for internal-combustion engines
US4262775A (en) * 1979-05-07 1981-04-21 Ingersoll-Rand Company Oil supply means for a machine
JPS57173513A (en) * 1981-04-17 1982-10-25 Nippon Soken Inc Variable valve engine
JPS6060380A (en) * 1983-09-14 1985-04-06 Hokkaido Suido Kizai Kk Constant-pressure valve for water supply
US4860856A (en) * 1988-06-28 1989-08-29 Esslinger Dwaine E Oil pressure adjustment device for engines
RU2194168C2 (en) * 1997-12-23 2002-12-10 Открытое акционерное общество Холдинговая компания "Барнаултрансмаш" Internal combustion engine lubrication system

Also Published As

Publication number Publication date
ES2263917T3 (en) 2006-12-16
EP1420148A2 (en) 2004-05-19
EP1420148A3 (en) 2005-06-01
ATE328193T1 (en) 2006-06-15
DE50303555D1 (en) 2006-07-06
DE10253576A1 (en) 2004-05-27

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