WO2014206763A1 - Thermostat eines fluidsystems - Google Patents
Thermostat eines fluidsystems Download PDFInfo
- Publication number
- WO2014206763A1 WO2014206763A1 PCT/EP2014/062319 EP2014062319W WO2014206763A1 WO 2014206763 A1 WO2014206763 A1 WO 2014206763A1 EP 2014062319 W EP2014062319 W EP 2014062319W WO 2014206763 A1 WO2014206763 A1 WO 2014206763A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fluid
- valve body
- valve
- outlet
- thermostat
- 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.)
- Ceased
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Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/01—Control of temperature without auxiliary power
- G05D23/02—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature
- G05D23/021—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature the sensing element being a non-metallic solid, e.g. elastomer, paste
- G05D23/022—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature the sensing element being a non-metallic solid, e.g. elastomer, paste the sensing element being placed within a regulating fluid flow
-
- 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
- F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
- F01M5/005—Controlling temperature of lubricant
- F01M5/007—Thermostatic control
Definitions
- the invention relates to a thermostat of a fluid system, in particular an oil circuit, in particular an internal combustion engine, in particular of a motor vehicle, with a thermostatic valve having a valve housing with at least one inlet for the fluid, at least a first outlet to a first fluid conduit and at least one second outlet to a second fluid line and comprising at least one valve body, with which the at least one first outlet and / or the at least one second outlet with respect to the at least one inlet can be at least partially separated.
- An engine oil circuit known from the market of an internal combustion engine of a motor vehicle has an oil cooler with which the engine oil can be cooled.
- the oil cooler is located in a main line of the engine oil circuit.
- the engine oil circuit has a bypass line with which the oil cooler can be bypassed.
- a thermostat is arranged with a thermostatic valve. With the thermostat, an oil flow through the bypass line can be adjusted depending on the oil temperature.
- the thermostatic valve has a valve body with an inlet connected to a supply line for the oil.
- the valve housing further has a main outlet, which is connected to the main line.
- a bypass outlet of the valve housing is connected to the bypass line.
- the thermostatic valve has a valve body that allows the bypass to be released depending on the oil temperature to the inlet.
- the valve body Below a predetermined oil temperature, the valve body is in an open position, in which it releases the bypass outlet.
- the engine oil can thus flow through the bypass line and bypass the oil cooler. In this way, the engine oil reaches its operating temperature faster.
- Upon reaching the operating temperature of the valve body closes the bypass outlet, so that the engine oil is passed through the engine oil cooler and thereby cooled.
- the invention has for its object to design a thermostat of the type mentioned, which is simple, reliable and robust. In particular, the service life of the thermostat should be extended.
- the thermostat can be used with any fluid systems.
- the thermostat can be used in an engine oil circuit of an internal combustion engine.
- the thermostat can advantageously be used in automotive engineering. He can also au outside of motor vehicles, especially in industrial engines, use. With the thermostat, the distribution of the fluid can be regulated to multiple outlets.
- the valve housing may be a separate housing.
- the valve housing can be realized as a valve housing section of a superordinated component, in particular a valve filter module.
- the valve filter module may additionally have a fluid filter.
- the at least one first outlet may be a main outlet.
- the at least one first outlet may advantageously be connected to a main fluid line.
- a fluid cooler, in particular an engine oil cooler, of the fluid system can advantageously be arranged in the main fluid line. With the fluid cooler, the fluid can be cooled.
- the fluid cooler can advantageously be designed to cool the fluid by means of a coolant.
- the at least one second outlet may be a bypass outlet.
- the at least one second outlet may advantageously be connected to a by-pass (bypass).
- the bypass line can advantageously bypass an aggregate of the fluid system, in particular the fluid cooler. With the thermostatic valve, the bypass line can be opened and closed as needed. If the thermostat is introduced into a valve filter module, thermostatic valve and fluid filter are preferably arranged in the valve filter module, that the at least one second outlet of the valve housing section is connected directly to the fluid filter via the bypass line, so that the fluid directly through this outlet Fluid filter can be fed.
- the main line in which, for example, the fluid cooler is introduced, is preferably also connected to the fluid filter.
- the fluid cooler can be designed as part of the valve filter module or as a separate component.
- the at least one first inlet and / or the at least one second outlet can be opened or closed as needed, depending on a state of the fluid, in particular a fluid temperature.
- At least one upstream inflow section of the at least one valve body has a streamlined shape.
- the at least one inflow section is an upstream portion of the valve body to which the fluid flows.
- the at least one inflow section can advantageously be made aerodynamic in its outer shape and / or size.
- the at least one inflow section be flow-conducting. In this way it can be achieved that the fluid flow along the upstream section can be improved.
- any turbulence can be avoided.
- a force of the fluid on the valve body can be reduced by the streamlined shape.
- a total of mechanical stress on the valve body can be reduced.
- pressure differences between the at least one inlet and the outlet to be controlled with the valve body, in particular when flowing through the outlet with fluid, can thus be reduced.
- a mechanical load on the valve body can be reduced.
- shrinkage of the valve body over time can be reduced. So a lifetime of the thermostatic valve can be extended altogether.
- the pressure difference between the at least one inlet and the at least one outlet may decrease as the fluid temperature increases. In this way can be reduced by the streamlined shape of the valve body, a mechanical load on the thermostatic valve in particular in a cold running phase of the internal combustion engine or at relatively low ambient temperatures. In the cold running phase and at low ambient temperatures, the temperature of the fluid, in particular of the engine oil, is generally below its operating temperature.
- the fluid pump in particular oil pump, can be correspondingly smaller due to the lower pressure they must spend. Further, when using the thermostat in an engine oil circuit, fuel consumption can be reduced due to the lower pressure losses.
- the at least one inflow section can be designed such that edges, in particular sharp edges, and transitions in the flow path of the fluid are avoided. In this way, the fluid flow can be improved.
- one of the outlets in particular at least one of the first outlets, may be located upstream of a valve seat of the valve housing for the at least one valve body.
- this outlet can always be open regardless of the operating state of the thermostatic valve.
- the valve seat can advantageously be formed by a portion of the valve housing, in particular a valve body receiving portion in which the valve body can be performed, at least with.
- the main outlet may be located upstream of the valve seat.
- the thermostatic valve can be designed so that only the connection between the at least one inlet and either the at least one first outlet or the at least one second outlet can be controlled, in particular regulated.
- bypass line can lead directly to a filter of the fluid system.
- the fluid can be fed directly to the filter, bypassing the fluid cooler.
- An outlet of the fluid cooler may also lead to the filter. So the oil from the main line and from the bypass line can be fed to the filter. In this way, the number of filters can be reduced accordingly.
- the at least one valve body can be designed as a kind of sleeve.
- Sleeves are hollow inside.
- a sleeve can be easily realized. Hollow components, in particular sleeves, can be realized with a lower weight than solid components. In this way, the mass to be moved can be reduced.
- An actuator used for moving the valve body can thus be dimensioned correspondingly smaller.
- the sleeve may advantageously be closed at its upstream end side. There, the sleeve can advantageously have the at least one upstream inflow section.
- the sleeve may have in the interior of the at least one inflow section in its interior at least one support means, in particular a support star. In this way, the sleeve can be stabilized from the inside.
- the interior of the sleeve can serve as a fluid channel. An effort to realize a fluid channel in or on the valve body, can be reduced.
- the at least one inflow section can widen on its outer side from its upstream side to its downstream side.
- An expansion of the at least one inflow section in the flow path is particularly streamlined.
- the fluid can flow evenly on the Au .seite the Anströmabêts along and flow around it.
- the outer side of the inflow section can conically expand. A conical expansion can be easily realized. It is even.
- At least one guide element can be arranged on the outside of the outer side of the valve body, at least for guiding the valve body in an inlet region of the valve housing.
- the valve body can be guided uniformly during movements in and against the closing direction.
- the risk can be reduced that the valve body tilted or twisted.
- a mechanical see load on the valve body can be reduced. This can have a positive effect on the service life of the thermostatic valve.
- the at least one guide element can have a flow-influencing effect. In this way, the fluid flow can be further improved.
- the at least one guide element may advantageously extend radially and / or axially to the outside of the valve body to form a movement axis, in particular a displacement axis, of the valve body.
- the movement axis is an imaginary axis along which the valve body can be moved, in particular displaced, relative to the valve housing. It is axial to the closing direction.
- the at least one guide element Transversely to the fluid flow, the at least one guide element can advantageously have a smaller extent than in the flow direction. A flow resistance can be minimized.
- At least one of the guide elements may have a type of wing, in particular.
- a streamlined and guide stable arrangement can be realized.
- a plurality of guide elements can be arranged distributed on the Au .seite of the valve body.
- the guide elements can advantageously be arranged evenly distributed. In this way, a uniform guidance and support of the valve body in the inlet region of the valve housing take place.
- three guide elements may be arranged in a star shape or four guide elements in a cross shape. Such arrangements allow uniform support on a peripheral side of the valve body.
- the at least one guide element can advantageously be integrally connected to the valve body. In this way, the valve body at least one guide element can be easily realized as a single component.
- the at least one guide element can advantageously be arranged on a receiving section of the valve body for receiving an actuating element, in particular a working piston, of an actuator. In this way, any lateral forces occurring during actuation of the valve body can be better compensated.
- the at least one valve body may comprise at least one fluid channel.
- the at least one fluid channel of the valve body allows fluid flow in, on or through the valve body.
- the at least one fluid channel can be arranged to save space in the interior of the valve body. In this way, the required space of the thermostatic valve can be reduced in total.
- the at least one fluid channel may extend with respect to the axis of movement of the valve body from an axially upstream region of the valve body to an axially downstream region.
- a corresponding fluid flow can be realized with an axial direction component through the valve body.
- the at least one fluid channel can advantageously be designed such that it can connect the at least one inlet with at least one of the outlets, in particular the at least one second outlet, in at least one position, in particular an open position, of the at least one valve body.
- the at least one inlet can be connected to the bypass line via the bypass outlet.
- the fluid in the open position of the at least one valve body, the fluid can flow through the bypass line.
- the fluid channel can have at least one fluid opening to an outside of the at least one valve body.
- the at least one fluid opening may be in a peripheral side of the at least one valve body. The circumferential side can be located radially outward on the valve body with respect to the movement axis.
- the at least one fluid opening can be located on the inflow side of the fluid channel.
- the fluid can flow through the at least one fluid opening on the inflow side into the fluid channel.
- the fluid can advantageously flow from radially outside to radially inside into the fluid channel.
- the fluid can flow from axially upstream to axially downstream of the fluid channel.
- the fluid may leave the valve body in the region of its downstream side.
- the at least one fluid channel may be open on the downstream side. This allows the fluid to flow out of the valve body on this side.
- the at least one valve body can be designed as a sleeve. The sleeve may be open on its downstream side.
- a plurality of fluid openings may be arranged in the peripheral side of the at least one valve body.
- the fluid openings may advantageously be distributed uniformly circumferentially on the valve body. In this way, a uniform distribution of the fluid can be carried out on the fluid openings.
- a one-sided mechanical load on the valve body can be reduced when flowing in the fluid. Any unilateral lateral forces can be reduced, preferably avoided, and / or compensated. This can have a positive effect on wear of the valve body. Furthermore, pressure losses can thus be reduced.
- the fluid openings may be substantially identical in shape and size. In this way, the inflow of the fluid can be further uniformed.
- the at least one fluid opening may be rectangular or square. Rectangular fluid openings may be referred to as windows or window openings. Alternatively, the at least one fluid opening may be round or oval.
- the at least one fluid opening can be arranged downstream of the at least one inflow section.
- the fluid can thus pass through at least one inflow section before it reaches the at least one fluid opening. In this way, the fluid with the at least one inflow section can be guided better to the at least one fluid opening.
- the valve body can be linearly movable with respect to a valve axis for opening and closing the thermostatic valve.
- the thermostatic valve can be constructed to save space axially to the valve axis.
- a linear movement can be easily realized.
- the valve axis may advantageously be parallel or coaxial with the axis of movement.
- the valve body can advantageously have at least one guide section.
- the valve housing may have at least one valve body receptacle.
- the valve body receptacle can advantageously be formed by corresponding walls of the valve housing. the.
- the valve body receptacle can advantageously be axial, in particular coaxial, to the valve axis and / or to the movement axis.
- the at least one guide section can be stably guided in the at least one valve body receptacle. In this way, opening and closing movements of the valve body can be precisely performed. A wear of the valve body can be reduced.
- valve body can be guided in the valve body recording almost free of play.
- the corresponding outlet can be sealed tightly with the valve body in the valve body receptacle.
- At least one fluid opening to at least one fluid channel can be arranged in the interior of the valve body in the region of the guide section.
- the at least one fluid opening In a closed position of the thermostatic valve, the at least one fluid opening may be located within the valve body receptacle. In this way, the at least one fluid opening in the closed position can be closed by a peripheral wall of the valve body receptacle.
- the valve body receptacle in particular the corresponding section of the circumferential wall, can thus act as a type of valve seat.
- the at least one fluid opening may be located outside the valve body receptacle. In the open position, the at least one fluid opening can be flowed through by fluid.
- At least the inflow section of the at least one valve body may be rotationally symmetrical at least on its outer side with respect to an axis of symmetry. In this way, at least the at least one inflow section can be flowed around concentrically. Thus, a uniformity of the fluid flow along the at least one inflow section can be improved. Any lateral forces on the valve body can be reduced. Thus, wear of the valve body can be reduced. The service life of the thermostatic valve can be extended further.
- the axis of symmetry may be coaxial or parallel to the valve axis.
- the axis of symmetry may be parallel or coaxial with the axis of movement of the valve body.
- the entire valve body can be rotationally symmetrical on an outside, at least with respect to its envelope, with respect to the axis of symmetry.
- the thermostatic valve may have at least one return element, with which a provision of at least one valve body in a basic position or holding in the normal position can be at least supported. With the at least one return element, the thermostatic valve can be easily kept in its normal position, especially in the passive state.
- the passive state is present in particular when the thermostatic valve is not activated, in particular by means of an actuator. This is especially the case when the internal combustion engine used is out of operation. When starting the internal combustion engine, the thermostatic valve on the passive state. From the passive state, the thermostatic valve can be operated accordingly.
- the basic position can be an open position.
- the at least one inlet can advantageously be connected to the at least one outlet, in particular the at least one second outlet.
- the thermostatic valve in the basic position When using a fluid cooler, the thermostatic valve in the basic position, the flow idid flow through the bypass line allow as long until the fluid has reached a predetermined temperature, in particular its operating temperature.
- a predetermined temperature in particular its operating temperature.
- the return element can be elastic.
- the elastic return element can be advantageously biased.
- the elasticity of the restoring element can be realized by appropriate shaping and / or choice of material.
- the at least one return element may advantageously comprise a spring, in particular a helical spring, preferably a helical compression spring.
- a spring can be easily realized. She is robust. With springs long service lives can be realized. Springs can be designed with low material fatigue. Thus, springs over the life of the thermostatic valve have the same elastic properties.
- An axis of the helical spring may advantageously be parallel or coaxial with the valve axis and / or the axis of movement and / or the symmetry axis of the valve body. In this way, a linear force from the coil spring can act on the valve body.
- any fluid passage in the interior of the valve body may serve as a receptacle for at least a portion of the at least one return element.
- the at least one control element can be arranged in a simple and space-saving manner in the valve body.
- the flow path can run within the at least one restoring element, in particular the helical spring. This has the advantage that the at least one return element can additionally be flown by the fluid and / or flow around it.
- the at least one return element can be additionally lubricated.
- the engine oil can additionally serve as a corrosion protector for the at least one restoring element. Thus, wear of at least the at least one restoring element can be reduced.
- the thermostatic valve may have at least one actuator with which the at least one valve body can be moved in the valve housing. With the at least one actuator, the thermostatic valve can be actuated. In this way, the thermostatic valve can be easily controlled and / or controlled.
- the thermostatic valve can be activated depending on operating conditions in the fluid system, in particular the internal combustion engine, and / or conditions of the fluid.
- the at least one actuator can be activated as a function of a temperature of the fluid. In this way, the thermostatic valve can regulate temperature dependent and / or control. Thus, a fluid flow between the inlet and the at least one corresponding outlet can be accurately adjusted depending on the fluid temperature.
- the at least one actuator may have an expansion (working) element.
- the expansion element may advantageously comprise an expansion material, in particular a stretch wax.
- the wax can change its volume easily and reliably depending on the temperature. By means of the volume change, the at least one valve body can be driven.
- the at least one actuator can advantageously be arranged in the flow path of the fluid. In this way, the at least one actuator can easily be flown by the fluid. Thus, simply a heat exchange between the fluid can take place in the actuator.
- the actuator can thus be activated depending on the temperature of the fluid.
- the at least one actuator can advantageously be arranged upstream of the valve body. Thus, the at least one actuator can be activated depending on the temperature of the inflowing fluid.
- the at least one actuator can be arranged in the vicinity of the at least one inlet.
- the expansion element can react faster to a change in temperature of the fluid. So overall, the reaction time of the thermostatic valve and the control accuracy can be improved.
- an actuator housing of the expansion element can be fixedly attached to the valve housing.
- the expansion material can be located in the actuator housing.
- a working piston of the expansion element can be moved by means of temperature-dependent volume changes of the expansion material relative to the valve housing.
- the working piston can advantageously be firmly connected to the valve body. It may advantageously be arranged in a piston receiving portion of the valve body. Due to the expansion of the expansion material, the valve body can be moved depending on the fluid temperature. Characterized in that the actuator housing with the contained expansion material on the side of the valve housing and the working piston is arranged on the side of the movable valve body, the mass to be moved is reduced. In this way, a editing accuracy of the thermostatic valve can be further improved. Furthermore, the required movement forces for activating the expansion element can be reduced.
- the expansion element can be dimensioned correspondingly smaller. In this way, the required space can be reduced.
- at least one valve in particular a check valve, can be arranged in the region of the at least one inlet. With the valve, a flow of the fluid through the at least one inlet can be controlled. With the check valve backflow of the fluid from the thermostatic valve can be prevented.
- the at least one valve can advantageously be arranged to save space in the at least one inlet.
- FIG. 2 shows the thermostat from FIG. 1 with the thermostatic valve in a closed state
- Figure 3 is an isometric view of a valve body of the thermostatic valve from the
- Figure 4 is a longitudinal view of the valve body with the expansion element of Figure 3;
- Figure 5 is a transverse side view of the valve body with the expansion element of the
- FIG. 6 shows a longitudinal section of the valve body with the expansion element of the figures
- FIG. 7 shows a section of a thermostat for controlling an oil flow through a bypass line for an oil cooler of an engine oil circuit of an internal combustion engine, with a thermostatic valve according to a second embodiment, which is shown here in an open state;
- FIG. 8 shows the thermostat from FIG. 7 with the thermostatic valve in a closed state.
- a thermostat 10 according to a first exemplary embodiment of an engine oil circuit of an internal combustion engine of a motor vehicle in different operating states is shown in a longitudinal section.
- the thermostat 10 is part of a thermostat filter module which also has an oil filter, not shown in FIGS. 1 and 2.
- the thermostat 10 has a thermostatic valve 12, with which an oil flow in a bypass line 14 of the engine oil circuit can be controlled depending on a temperature of the engine oil.
- the bypass line 14 leads directly from the thermostatic valve 12 to the oil filter.
- the bypass line 14 bypasses an oil cooler, not shown in Figures 1 and 2, which can be flowed through for cooling the engine oil.
- the oil cooler is located in a direction indicated in the figure 1 and 2 main line 16 of the engine oil circuit.
- the main line 16 passes through the oil cooler in the oil filter. From the oil filter, a corresponding oil line leads, for example, to aggregates and / or lubrication points of the internal combustion engine.
- a supply line 18 of the engine oil circuit indicated in FIGS. 1 and 2 leads to the thermostat 10.
- the supply line 18 comes, for example, from an oil pump of the internal combustion engine with which the engine oil can be pumped through the engine oil circuit.
- the thermostat 10 has a valve housing portion 20 in which a valve body 22 is axially displaceable to a valve axis 24.
- the valve axis 24 coincides in the illustrated embodiment with a displacement axis along which the valve body 22 can be moved.
- the valve axis 24 is therefore coaxial with the axis of displacement.
- the valve housing section 20 has an inlet space 26, in FIGS and 2 on the left, and an outlet space 28, on the right, on.
- the inlet space 26 and the outlet space 28 each have an approximately circular cylindrical cross section.
- the diameter of the outlet space 28 is smaller than the diameter of the inlet space 26.
- the inlet space 26 and the outlet space 28 are each coaxial with the valve axis 24. They are arranged one behind the other in the flow direction of the engine oil.
- the inlet space 26 and the outlet space 28 merge into each other at one of their end faces.
- the valve housing portion 20 further includes an inlet 30.
- the inlet 30 is located in a peripheral side of the inlet space 26. It connects the supply line 18 with the inlet space 26.
- the inlet 30 has a round cross-section.
- a check valve 32 is arranged in the inlet 30, arranged. A passage direction of the check valve 32 points into the inlet space 26. In this way, engine oil can flow from the supply line 18 into the inlet space 26. A return flow from the inlet space 26 into the supply line 18 is prevented by the check valve 32.
- a main outlet 34 leads from the inlet space 26.
- the main outlet 34 is located on the same circumferential side of the inlet space 26, on which the inlet 30 is arranged.
- the main outlet 34 has a round cross-section.
- a diameter of the main outlet 34 corresponds approximately to the diameter of the outlet space 28.
- the main outlet 34 connects the inlet space 26 with the main line 16.
- the valve body portion 20 further has a bypass outlet 36.
- the bypass outlet 36 is located on the end face of the outlet space 28 axially opposite the inlet space 26.
- the bypass outlet 36 connects the outlet space 28 to the bypass 14.
- the bypass outlet 36 has a circular cross-section. It is coaxial with the valve axis 24. Its inner diameter is smaller than the Au walked hygiener the outlet space 28th
- the valve body 22 has the shape of a circular cylindrical sleeve.
- the valve body 22 is coaxial with the valve axis 24. It is rotationally symmetrical with respect to the valve axis 24.
- the valve axis 24 forms as well as the axis of symmetry of the valve body 22.
- the valve body 22 is open on its the outlet chamber 28 facing end side.
- the inlet side 26 facing, upstream side of the valve body 22 is closed. It forms an inflow section 38.
- a radially outer circumference of the inflow section 38 tapers from the outlet space 28 to the inlet space 26.
- the radially externa ßere peripheral side of the Anströmabitess 38 is conically shaped.
- the Anströmabêt 38 has a streamlined shape.
- the inflow section 38 is located in each, from the valve body 22 engageable operating position within the inlet space 26. At its end facing away from the outlet space 28 of the inflow section 38 is in a piston receiving portion 40 via.
- the piston receiving portion 40 has radially outward Shen a circular cylindrical shape.
- the piston receiving portion 40 has a coaxial blind hole for receiving a coaxial working piston 42 of a Dehnscherlements 44. The blind hole is open on its the Anströmabêt 38 axially facing away.
- the expansion element 44 has an actuator housing 46 in which an expansion material, for example a stretch wax, is located.
- the expansion material has the property that it expands with increasing temperature, thus increasing its volume.
- the working piston 42 is connected to the expansion material. It can thus be displaced axially with the expansion substance depending on a temperature.
- the actuator housing 44 is fastened on the side of the inlet space 26 opposite the outlet space 28 in the valve housing section 20.
- a support star 48 shown in Figures 1, 2, 5 and 6 is arranged within the inflow portion 38 of the valve body 22 .
- the support star 48 consists of six support struts, which each extend radially and axially.
- the support struts are radially outer Shen each integrally connected to a radially inner peripheral wall of the Anströmabitess 38.
- a guide portion 50 of the valve body 22 On the piston receiving portion 40 axially opposite side is followed by the inflow portion 38, a guide portion 50 of the valve body 22 at.
- a radially externa ßere peripheral side of the guide portion 50 is circular cylindrical.
- the guide section 50 of the valve body 22 is guided coaxially in a circular cylindrical valve body section 52 of the valve housing section 20.
- the outer diameter of the guide portion 50 corresponds approximately to the inner diameter of the valve body receiving portion 52. In this way, the valve body 22 in the valve body receiving portion 52 can be moved radially almost free of play in the axial direction.
- the guide section 50 has four window openings 54 in its peripheral side.
- the window openings 54 are located axially at the same height next to the Anströmabites 38.
- the window openings 54 are identical in shape and size.
- the window openings 54 each have an approximately rectangular shape. In each case two mutually parallel sides of the window openings 54 extend parallel to the valve axis 24, the two other mutually parallel sides extend in each case circumferentially.
- the window openings 54 are circumferentially evenly distributed. They connect an interior of the valve body 22, which acts as an oil passage 56, with the Au chseite the valve body 22. In an open position of the thermostatic valve 12, which is shown in Figure 1, the window openings 54 are within the inlet space 26. In this way an oil flow from the inlet space 26 through the window openings 54 in the oil passage 56 is released.
- the window openings 54 are closed by the radially inner peripheral side of the valve body receiving portion 52.
- the valve body receiving portion 52 thus forms a valve seat for the valve body 22 in the area in which it closes the window openings 54.
- the oil passage 56 is stepped in the axial direction. Its inner diameter on the window openings 54 facing away from the axial side is greater than on the window openings 54 facing side.
- a longitudinal axis of the helical compression spring 60 is coaxial with the valve axis 24.
- the helical compression spring 60 is supported with its inlet 26 facing the end of a step 62 of the radially inner peripheral side of the Guide section 50 from.
- the step 62 forms the transition between the section of the oil passage 56 with the enlarged cross section and the section with the tapered cross section.
- the helical compression spring 60 is supported on a second outlet-side step 64.
- the step 64 surrounds the bypass outlet 36 radially outward. It forms the transition from the outlet space 28 to the bypass outlet 36.
- the helical compression spring 60 has a spring preload with which in the basic position of the thermostatic valve 12 the valve body 22 is pressed out of the outlet space 28 in the axial direction and against the expansion element 44.
- the basic position of the thermostatic valve 12 coincides in the embodiment shown with its open position.
- engine oil is pumped by means of the oil pump through the engine oil circuit.
- the engine oil passes from the supply line 18 through the inlet 30 and the check valve 32 into the inlet space 26.
- the flow through the inlet 30 is indicated in Figure 1 by an arrow 66.
- the engine oil flows around the actuator housing 46 of the expansion element 44 and comes into thermal contact with this. There is a heat exchange between see the engine oil and the expansion of the expansion element 44 instead.
- the volume or an increase in volume of the expansion material of the expansion element 44 is too low to exert a force required for the axial displacement of the valve body 22 on the working piston 42.
- the predefinable oil temperature is less than or equal to the operating temperature, which is optimal for the corresponding engine oil for operating the internal combustion engine. Due to the bias of the helical compression spring 60, the valve body 22, as shown in the figure, pressed against the expansion element 44 that the window openings 54 are located within the inlet space 26.
- the motor oil flows around the flow-favorable inflow section 38 of the valve body 22.
- the flow of the engine oil along the inflow section 38 is indicated in FIG. 1 by an arrow 68. The flow is there essentially in the axial direction.
- Part of the engine oil flows out through the main outlet 34 and out of the inlet space 26. This part of the engine oil enters the main line 16.
- the oil flow into the main outlet 34 is indicated in FIG. 1 by an arrow 70.
- the engine oil flows through the oil cooler, where it is cooled and enters the oil filter. From there, the engine oil continues to flow to the units and / or the lubrication points of the internal combustion engine.
- Another part of the engine oil flows evenly distributed through the window openings 54 of the valve body 22 from radially au Shen radially inward into the oil passage 56. This part of the engine oil flows into the oil passage 56 from axially upstream to axially downstream, indicated by It also flows through the helical compression spring 60.
- the engine oil passes into the outlet space 28. From there, the engine oil flows through the bypass outlet 36 in the bypass line 14. It is supplied with the bypass line 14 to the oil filter. There it unites with the part of the engine oil from the main line 16 and passes with this to the units and / or the lubrication points of the internal combustion engine.
- the temperature of the engine oil increases.
- the expansion material of the expansion element 44 expands and pushes the working piston 44 and thus the valve body 22 against the spring force of the helical compression spring 60 axially in a closing direction.
- the valve body 22 is guided in the valve body receiving portion 52.
- the closing direction is indicated in the figure 1 by an arrow 74.
- the closing direction 74 is coaxial with the direction of displacement and the valve axis 24th
- the window openings 54 are continuously pushed into the valve body receiving portion 52 and are increasingly concealed by it.
- the proportion of engine oil which passes through the window openings 54 in the oil passage 56 and thus in the bypass line 14 decreases with increasing oil temperature. Accordingly, the proportion of engine oil, which is passed through the main line 16 through the oil cooler and cooled.
- the window openings 54 are completely covered.
- the entire engine oil supplied to the thermostatic valve 12 is passed through the main outlet 34 of the main pipe 16 and supplied to the oil cooler. If the oil temperature decreases during operation of the internal combustion engine or after a standstill period, the volume of the expansion material decreases. The oil temperature may decrease, for example as a result of strongly decreasing ambient temperature and / or decreasing load on the internal combustion engine.
- the working piston 42 is pressed, inter alia, by means of the spring force of the helical compression spring 60 counter to the closing direction 74 in the direction of its starting position.
- the window openings 54 are released depending on the oil temperature in a corresponding extent, so that the engine oil can flow at least in part through the bypass line 14.
- FIG. 7 a section of the valve filter module is shown, in which the thermostat is inserted, except for the thermostat.
- the bypass line 1 14 opens on the bypass outlet 1 36 side facing away from the inlet of the filter, not shown.
- the filter may comprise a filter element.
- the second embodiment differs from the first embodiment in that in the second embodiment, the valve body 122 additionally four support wings 76 1.
- the support vanes 176 are located on the radially outer peripheral side of the piston receiving portion 140. They are integrally connected to the piston receiving portion 140.
- the support wings 176 each extend from radially inward to radially outward Shen and in the axial direction.
- the support wings 1 76 are arranged in cross section along a cross. At the radially externa ßeren peripheral side, the support wings 1 76 each based on the radially inner peripheral side of the peripheral wall of the inlet space 1 26 from. During an axial movement of the valve body 122, this is guided with the support sleeves 1 76 in the inlet space 126.
- the support vanes 176 act as flow-guiding means for the engine oil, which flows around the inflow portion 138 of the valve body 122.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Temperature-Responsive Valves (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE112014003003.1T DE112014003003A5 (de) | 2013-06-28 | 2014-06-13 | Thermostat eines Fluidsystems |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102013010781.4 | 2013-06-28 | ||
| DE102013010781.4A DE102013010781A1 (de) | 2013-06-28 | 2013-06-28 | Thermostat eines Fluidsystems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014206763A1 true WO2014206763A1 (de) | 2014-12-31 |
Family
ID=50972683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2014/062319 Ceased WO2014206763A1 (de) | 2013-06-28 | 2014-06-13 | Thermostat eines fluidsystems |
Country Status (2)
| Country | Link |
|---|---|
| DE (2) | DE102013010781A1 (de) |
| WO (1) | WO2014206763A1 (de) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2488345A1 (en) * | 2004-11-24 | 2006-05-24 | Dana Canada Corporation | By-pass valve for heat exchanger |
| US20060163373A1 (en) * | 2004-05-21 | 2006-07-27 | Nippon Thermostat Co., Ltd | Thermostat device |
| DE102008059806A1 (de) * | 2007-12-07 | 2009-06-10 | Ford Global Technologies, LLC, Dearborn | Auf Temperatur ansprechendes Stromregelventil für eine Motorkühlanlage |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT387631B (de) * | 1987-04-24 | 1989-02-27 | Vaillant Gmbh | Doppelventil |
| DE4124304C2 (de) * | 1991-07-23 | 1994-11-24 | Heimeier Gmbh Metall Theodor | Thermostatisch betätigbares Dreiwege-Heizkörperventil für Einrohrheizungsanlagen |
| DE29502097U1 (de) * | 1995-02-09 | 1995-03-23 | Gustav Wahler Gmbh U. Co, 73730 Esslingen | Thermostatventil |
| DE29619609U1 (de) | 1996-11-12 | 1997-01-16 | Behr Thermot-Tronik Gmbh & Co., 70806 Kornwestheim | Thermostatventil |
| DE102006033315A1 (de) * | 2006-07-17 | 2008-01-24 | Behr Gmbh & Co. Kg | Ventil zur Steuerung eines Kühlmittelstroms für einen Heizkörper eines Kraftfahrzeuges, System mit zumindest einem Ventil |
| DE102010009173A1 (de) * | 2010-02-24 | 2011-08-25 | Otto Egelhof GmbH & Co. KG, 70736 | Ventil zur Steuerung eines Strömungskanales |
-
2013
- 2013-06-28 DE DE102013010781.4A patent/DE102013010781A1/de not_active Withdrawn
-
2014
- 2014-06-13 DE DE112014003003.1T patent/DE112014003003A5/de not_active Withdrawn
- 2014-06-13 WO PCT/EP2014/062319 patent/WO2014206763A1/de not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060163373A1 (en) * | 2004-05-21 | 2006-07-27 | Nippon Thermostat Co., Ltd | Thermostat device |
| CA2488345A1 (en) * | 2004-11-24 | 2006-05-24 | Dana Canada Corporation | By-pass valve for heat exchanger |
| DE102008059806A1 (de) * | 2007-12-07 | 2009-06-10 | Ford Global Technologies, LLC, Dearborn | Auf Temperatur ansprechendes Stromregelventil für eine Motorkühlanlage |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102013010781A1 (de) | 2014-12-31 |
| DE112014003003A5 (de) | 2016-03-10 |
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