Classifications

• • 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
  • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
  • F01M11/0004—Oilsumps
• • 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
  • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
  • F01M11/0004—Oilsumps
  • F01M2011/0016—Oilsumps with thermic insulation
• • 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
  • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
  • F01M11/0004—Oilsumps
  • F01M2011/002—Oilsumps with means for improving the stiffness
• • 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
  • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
  • F01M11/0004—Oilsumps
  • F01M2011/0037—Oilsumps with different oil compartments
  • F01M2011/0045—Oilsumps with different oil compartments for controlling the oil temperature
• • 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
  • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
  • F01M11/0004—Oilsumps
  • F01M2011/0066—Oilsumps with passages in the wall, e.g. for axles or fluid passages

Definitions

• the present invention relates to an oil pan, which has a bottom wall and a lateral outer wall which extends in the assembled state of the oil pan in the direction of gravity from the bottom wall upwards, and an oil storage area which is arranged in an interior of the oil pan and in the operation of Oil pan is filled to a storage level filled with oil.
• Such oil pans serve to receive a reservoir of an engine oil for an internal combustion engine and are attached to an engine block of the internal combustion engine.
• the present invention has for its object to provide an oil pan of the type mentioned, which improved heat and
• an oil pan with the features of the preamble of claim 1 according to the invention in that the oil pan an adjacent to the lateral outer wall oil cooling area, which is filled to a cooling level with oil, and a decoupling device for decoupling the cooling level of the oil in the Oil cooling area of the
• Storage level of the oil in the oil storage area in a cooling state of the oil pan comprises.
• a cooling level of the oil in the oil cooling region is adjustable, which is above the storage level of the oil in the oil storage region.
• the present invention is based on the concept of producing an increased oil level in an oil cooling region of the interior of the oil sump which directly adjoins the lateral outer wall of the oil sump, so that the largest possible proportion of the lateral outer wall is in contact with oil which is in contact with oil located in the oil cooling area.
• the outer side wall may give heat to this oil in the areas where it contacts oil of the oil cooling area, so that the oil has a cooling effect on the outer side wall.
• the material of the lateral outer wall can assume a maximum of the oil temperature at the inside of the outer wall facing the oil cooling area. As a result, the material structure of the lateral outer wall retains a higher residual rigidity when exposed to high heat and / or direct flame contact. The collapse or breaking of the outer wall is greatly delayed or completely prevented.
• the present invention is based on the finding that in particular oil pans made of a plastic material, for example of a polyamide material, with high heat, for example in the case of engine fire, just fail where no oil rests against the inside of the lateral outer wall of the oil pan. There reaches the lack of cooling, the surface of the oil pan its melting point, so that the outer wall melts and / or aufklafft by the mass of the oil contained in the oil pan. This allows oil or liquid oil to escape from the sump and accelerate the fire.
• a plastic material for example of a polyamide material
• the oil cooling region extends along the entire lateral outer wall of the oil pan.
• the oil storage area of the oil pan is preferably completely surrounded by the oil cooling area of the oil pan.
• the cooling level of the oil in the oil cooling region in the cooling state of the oil pan is always above 50%, in particular always above 80%, particularly preferably above 90%, the height of the side outer wall adjacent to the oil cooling region ,
• an upper edge of a dividing wall between the oil cooling region and the oil storage region is above 50%, in particular above 80%, particularly preferably above 90%, of the height of the lateral outer wall adjacent to the oil cooling region.
• the cooling level of the oil in Oikühiungs Scheme in the cooling state of the oil pan at the height of a mounting flange of the oil pan, by means of which the oil pan can be connected to a motor, or at most the height H of the mounting flange (that is to its Expansion in the direction of gravity, in the mounted state of the oil pan) is located below a lower edge of the mounting flange.
• the decoupling device for decoupling the cooling level of the oil in the Oikühiungs Scheme of the storage level of the oil in the oil storage area may in particular comprise a arranged between the Oikühiungs Scheme and the oil storage area partition.
• the partition preferably extends upwardly from the bottom wall of the oil pan in the direction of gravity.
• Such a partition may be permanently formed impermeable to oil.
• the partition may have at its upper edge an overflow through which oil can pass from the Oikühiungs Colour in the oil storage area.
• the partition wall between the Oikühiungs Scheme and the oil storage area is preferably formed annular closed.
• the oil pan comprises at least one valve device for temporarily releasing an oil passage in the partition wall in a release state of the valve device.
• the valve device may in particular be arranged on the outside of the dividing wall facing the oic-flow region or on the inside of the dividing wall facing the oil-storing region.
• the valve device may be designed such that it can be converted into the release state by a control device of the engine or of the motor vehicle, in which the oil pan is arranged, when a predetermined time has elapsed after the engine has been taken out of operation.
• valve device can be transferred into the release state as a function of a temperature of the oil in the oil sump.
• valve device Such a transferability of the valve device into the release state as a function of the temperature of the oil which is in contact with the valve device can be realized in a particularly simple manner in that the valve device comprises a bimetallic element.
• Such a bimetal element changes its shape as a function of the temperature.
• the bimetallic element assumes the shape of a substantially flat plate at an operating temperature of the oil, which assumes the oil during operation of the internal combustion engine, and the bimetallic element at a lower standby temperature, which assumes the oil after a longer period of operation of the internal combustion engine , assumes a curved shape.
• the bimetallic element assumes the form of a substantially flat plate at the rest temperature and assumes a curved shape at the operating temperature.
• the bimetallic element preferably comprises a first layer of a first material and a second layer of a second material, wherein the thermal expansion coefficient of the first material is preferably greater than the coefficient of thermal expansion of the second material, in the relevant temperature range from the rest temperature to the operating temperature.
• the first material of the bimetallic element may, for example, comprise copper and in particular be formed as pure copper or a copper alloy.
• the second material may comprise, for example, iron and in particular be formed as a steel material, in particular as a spring steel material.
• the bimetallic element may serve as a valve body, which in a
• the bimetallic element When the temperature rises, the bimetallic element then deforms so that it no longer rests against the valve seat and thus releases the old passage in the dividing wall, so that oil can pass from the oil cooling area into the oil storage area.
• the bimetallic element is designed as a drive element of the valve device, which is in operative connection with a valve body of the valve device, that the bimetallic element on lowering the oil temperature from the operating temperature to the rest temperature, a movement of the valve body from the closed state in which the valve body abuts against the valve seat of the valve device and closes the Ol miclass in the partition, in the release state in which the valve body is spaced from the valve seat and the Ol miclass in the partition wall releases, drives.
• valve body may be formed, for example, as a valve flap, which is preferably held pivotably on the valve seat and / or on a valve housing of the valve device.
• the valve device is preferably at least temporarily, in particular always, in a closed state in which the valve device shoots the Ol trimlass in the partition wall. In this way, it is possible to set a cooling level in the oil cooling region during operation of the engine which is higher than the storage level of the oil in the oil storage area.
• an overflow is preferably provided, through which oil from the oil cooling area, in particular directly, can reach the oil storage area.
• the oil cooling region preferably has an oil inlet, through which oil entering the oil sump from the engine passes, in particular directly, into the oil cooling region.
• a flow guiding device which extends the flow path of the oil from the oil inlet to an oil outlet of the oil cooling region through which oil can pass from the oil cooling region into the oil storage region. This prevents oil entering the oil cooling section from being directly discharged from the oil inlet to the oil inlet Oil outlet of the oil cooling area passes and exits from there in the ⁇ l Grandebe- rich. In this way, the largest proportion of the oil in the oil cooling area would be excluded from a fluid exchange with the oil storage area.
• the flow-guiding device causes the oil entering the oil-cooling region to move along the preferably entire oil-cooling region from the oil inlet to the oil outlet so that substantially all of the oil absorbed in the oil-cooling region is discharged through the oil outlet enters the oil storage area and thus substantially all the oil contained in the oil cooling area is replaced over time.
• the flow-guiding device can in particular comprise at least one flow-guiding element, for example in the form of a flow-deflecting wall, from the oil inlet in the direction of gravity downwards into the region below 50%, in particular into the region below 30%, the height of the at Oil cooling region adjacent lateral outer wall and / or extends to the range below 50%, in particular to the range below 30%, the height of the adjacent to the oil cooling region partition wall between the oil cooling region and the oil storage area.
• at least one flow-guiding element for example in the form of a flow-deflecting wall, from the oil inlet in the direction of gravity downwards into the region below 50%, in particular into the region below 30%, the height of the at Oil cooling region adjacent lateral outer wall and / or extends to the range below 50%, in particular to the range below 30%, the height of the adjacent to the oil cooling region partition wall between the oil cooling region and the oil storage area.
• the oil sump comprises an oil return guide, which oil entering the oil sump to the oil inlet of the oil Oil cooling area directs.
• the oil return guide device may in particular comprise a funnel.
• the oil return guide device preferably extends into the region vertically above the oil outlet of the oil cooling region (in the mounted state of the oil pan), more preferably also into the region vertically above the oil storage region (in the mounted state of the oil pan).
• the highest level of the cooling level of the oil in the oil cooling area preferably corresponds to the height of the overflow at the upper edge of the dividing wall between the oil cooling area and the oil storage area.
• the present invention further relates to a method for preventing a heat sink failure of an oil pan.
• the present invention has the further object of providing such a method, which improves in particular the heat and flame resistance of an oil pan of a plastic material.
• the oil pan according to the invention is particularly suitable for carrying out the method according to the invention for preventing a heat caused by a failure of an oil pan.
• the oil pan according to the invention preferably comprises an integrally formed body.
• the main body preferably comprises a thermoplastic plastic material, for example a polyamide material, in particular polyamide 6.6.
• the main body of the oil pan is formed of a glass fiber reinforced plastic material, in particular of a glass fiber reinforced polyamide material.
• the base body of the oil sump can be produced in an injection molding process, in particular in a cascade injection molding process.
• An oil pan with a base made of a plastic material offers the advantage that the oil storage volume can be increased in a simple manner by means of laterally set additional chambers.
• these additional chambers are part of the oil cooling area of the oil pan, this offers the advantage that these additional chambers are filled with oil to a high percentage, preferably completely, due to the increased cooling level of the oil in the oil cooling area during operation of the engine, so that the additional chambers provided additional oil storage volume is particularly effectively exploited. Further features and advantages of the invention are the subject of the following description and the drawings of exemplary embodiments.
• Fig. 1 is a perspective view of an oil pan, a
• a deep area and a rear flat area the flat area extending in an oil pan longitudinal direction of the main body of the oil pan from the deep area and wherein in the interior of the oil pan, a partition wall is provided which an oil cooling area of the oil pan separates from an oil storage area of the oil pan, facing a mounted in the state of the engine block facing the top of the oil pan;
• FIG. 2 shows a further perspective illustration of the oil sump of FIG. 1 with a view of an underside of the sump remote from the engine block in the mounted state of the sump;
• Fig. 3 is a plan view from above of the oil pan of Figs. 1 and 2;
• Fig. 4 is a side view of the main body of the oil pan of Figs. 1 to 3, with the viewing direction in the direction of arrow 4 in FIG. 3;
• FIG. 5 is a front view of the oil pan of FIGS. 1 to 4, with the
• FIGS. 1 to 5 is a view of the oil pan of FIGS. 1 to 5 from the back, with the
• FIG. 3 is a perspective view of a second embodiment of an oil sump comprising a partition wall separating an oil cooling area from an oil sump storage area and an oil return guide device directing oil entering the sump from the engine to an oil inlet of the oil cooling area; with a view to an upper side of the oil sump facing the engine block when assembled; a plan view of the oil pan of Figure 8 from above. a side view of the oil pan of Figs. 8 and 9, looking in the direction of the arrow 10 in Fig. 9; a front view of the oil pan of Figs.
• FIGS. 15 to 17 a perspective view of a first embodiment of a valve device for temporarily releasing an oil passage in a partition wall of an oil pan between an oil cooling area and an oil storage area of the oil pan
• the Valve device comprises a bimetallic element as a valve body for closing the oil passage and is in a closed state, facing a front side of the valve device; a corresponding perspective view of the valve device, but without the bimetallic element closing the oil passage; a plan view of the oil passage facing the back of the bimetallic element; a further perspective view of the valve device of FIGS. 15 to 17, looking at a rear side of the valve device; a front view of the valve device of FIGS. 15 to 18; one of FIG. 19 corresponding front view of the valve device of FIGS.
• Fig. 23 is a vertical longitudinal section through the valve device of the
• FIG. 15 to 22 taken along the line 23 - 23 in Fig. 19;
• 24 is a perspective view of a second embodiment of a valve device for temporarily releasing an oil passage in the partition wall between the oil cooling section and the oil reservoir portion of an oil pan in a release state of the valve device, the valve device comprising a pivotally supported valve flap and a bimetal element for driving movement of the valve Valve flap from the release state comprises in a closed state, facing a front side of the valve device;
• Fig. 25 is a further perspective view of the valve device
• Fig. 26 is another perspective view of the valve device of Figs. 24 and 25, looking towards the front of the valve device but without the valve flap closing an oil passage of the valve device; a perspective view of the pivotally held valve flap, the bimetallic element and a spacer de valve device of FIGS. 24 to 26; a front view of the valve device of FIGS. 24 to 27; a side view of the valve device of FIGS. 24 to 28, with the viewing direction in the direction of the arrow 29 in FIG. 28; a vertical longitudinal section through the valve device of Figures 24 to 29, taken along line 30 - 30 in Fig. 28.
• FIG. 31 is a plan view of the valve device of FIGS. 24 to 30 from the rear, with the viewing direction in the direction of the arrow 31 in FIG. 29; and Fig. 32 is a horizontal cross-section through the valve device of Figs. 24 to 31, taken along line 32-32 in Fig. 28th
• FIGS. 1 to 8 shown as a whole and denoted by 100, comprises a trough-shaped main body 102, which comprises a front, deep region 104 and a rear, flat region 106, the flat region 106 being in an oil pan longitudinal direction 108 of the oil sump 100 and the body 102 extends away from the deep region 104.
• the flat region 106 of the main body 102 has side walls 110 which extend opposite one another and extend in the longitudinal direction 108, which are connected to one another at a rear end of the main body 102 remote from the deep region 104 by a rear wall 112, and a bottom 114 which supports the two Side walls 110 connects to each other.
• the bottom 114 of the flat portion 106 of the main body 102 is in the installed state of the oil pan 100 almost horizontally, with a slight inclination to the deep portion 104 of the body 102 of the oil pan 100 out aligned.
• the front deep region 104 of the main body 102 of the oil sump 100 comprises a bottom 116, a front wall 118 facing away from the flat region 106 of the oil sump 100, a rear wall 120 connecting the bottom 116 of the deep region 104 to the bottom 114 of the flat region 106 and two Front wall 118 with the rear wall 120 connecting side walls 122 which extend substantially parallel to the oil pan longitudinal direction 108.
• a mounting flange 124 which (the mounting of the body 102 of the oil pan 100 (via a seal, not shown) on the engine block of a (not shown) internal combustion engine is used.
• the mounting flange 124 has a plurality of spaced apart in the circumferential direction of the mounting flange 124 receptacles 126 for (not shown) mounting screws with which the oil pan 100 is fixed to the engine block.
• the oil pan 100 may be provided with a ribbing 128.
• the ribbing 128 may in particular comprise transverse ribs 130 which are arranged on the outside of the main body 102 and, starting from the fastening flange 124, in a direction of gravity 132 down over a side wall 110 of the flat region 106 or over a side wall 122 of the deep region 104 the oil pan 100, in a direction perpendicular to the oil pan longitudinal direction 108 and perpendicular to the direction of gravity 132 aligned oil pan transverse direction 134 over the bottom 114 of the flat portion 106 or the bottom 116 of the deep portion 104 and then in the direction of gravity 132 upwards over one of first side wall 110 extend opposite another side wall 110 of the flat portion 106 and another side wall 122 of the deep portion 104 of the oil pan 100 to the mounting flange 124 extend.
• the transverse ribs 130 are preferably spaced apart in the oil pan longitudinal direction 108, in particular substantially equidistantly.
• the ribbing 128 may include longitudinal ribs 136 which are disposed on the outside of the body 102 of the oil pan 100 and, starting from the mounting flange 124, in the direction of gravity 132 down over the front wall 118 of the deep portion 104 of the oil pan 100, in the Oil pan longitudinal direction 108 over the bottom 116 of the deep portion 104 of the oil pan 100, along the rear wall 120 of the deep portion 104 from the bottom 116 of the deep portion 104 to the bottom 114 of the flat portion 106, over the bottom 114 of the flat portion 106 in the Oil pan longitudinal direction 108 and extend over the rear wall 112 of the flat portion 106 of the oil pan 100 in the direction of gravity 132 up to the mounting flange 124.
• the longitudinal ribs 136 are preferably spaced apart in the oil pan transverse direction 134, in particular substantially equidistantly.
• the front wall 118, the side walls 122 of the deep portion 104, the side walls 110 of the flat portion 106, and the rear wall 112 of the flat portion 106 of the oil pan 100 together form a preferably annular closed lateral outer wall 138 of the oil pan 100 which defines an interior 140 of the oil pan Sump 100 and extends in the mounted state of the oil pan 100 from the formed by the bottom 116 of the deep portion 104, the rear wall 120 of the deep portion 104 and the bottom 114 of the flat portion 106 bottom wall 142 of the oil pan 100 in the direction of gravity 132 upwards ,
• a partition wall 144 is arranged, which as well as the lateral outer wall 138 in the mounted state of the oil pan 100 from the bottom wall 142 of the oil pan 100 in the
• Gravity direction 132 extends upward, preferably approximately to the level of the lower edge of the mounting flange 124 (see the sectional view in Fig. 7).
• This dividing wall 144 preferably runs substantially parallel to the lateral outer wall 138 surrounding the same and is preferably likewise substantially annularly closed.
• the partition wall 144 separates a region of the interior space 140 of the oil sump 100, which is referred to below as the oil storage area 146, within the partition wall 144 from an area of the interior space 140 of the sump located between the partition wall 144 and the lateral outer wall 138 of the sump 100 100, which in the following as
• Olkühlungs Symposium 148 Olkühlungs Symposium 148 is designated.
• the oil cooling region 148 may be defined by transverse walls 150 which extend in the oil pan transverse direction 134 from the dividing wall 144 to the lateral outer wall 138 and preferably in the region of the transition between the flat region 106 and the deep region 104 of the oil pan 100 a front Olkühlungs Society 148 a and be divided into a rear Olkühlungs Complex 148 b.
• the dividing wall 144 may be provided with ribs 152 to increase its mechanical rigidity, which in the mounted state of the oil pan 100 extend preferably from the bottom wall 142 in the direction of gravity 132 up to the upper edge 154 of the dividing wall 144.
• these ribs 152 are preferably spaced apart, in particular substantially equidistant.
• the mounting flange 124 of the oil pan 100 surrounds a - in the assembled state of the oil pan 100 preferably substantially horizontally oriented - oil inlet surface 156 of the oil pan 100, which coming from the engine block of the oil pan 100 connected to the internal combustion engine oil in liquid form and / or in the form of Oil mist in the interior 140 of the oil pan 100 occurs.
• the oil mist entering the oil sump 100 during operation of the internal combustion engine impacts mainly on the inside of the lateral outer wall 138 and runs down into the oil cooling region 148 of the interior 140 of the oil sump 100.
• the oil return passages (not shown) of the engine block are preferably arranged on the engine block such that the oil emerging from these oil return passages lies through the outer region 156a of the oil inlet surface 156 of the oil pan 100, which in the installed state of the oil pan 100 is vertically above the oil cooling region 148 (see Fig. 7), passes directly into the oil cooling region 148 of the interior 140 of the oil pan 100.
• the oil cooling region 148 of the oil pan 100 is therefore always filled with oil in a cooling state of the oil pan up to a cooling level 160 which is at the level of the overflow 158 or just below the overflow 158.
• oil suction pipe (not shown) to supply the same to the engine.
• the oil storage area 146 is therefore filled with oil during operation of the oil pan 100 up to a (variable) storage level 162, wherein the storage level 162 is always below the cooling level 160. Since the partition wall 144 between the oil storage area 146 and the Olkühlungs Scheme 148 is oil-impermeable, the partition wall 144 forms a decoupler 164, which prevents compensation of the oil levels in the oil storage area 146 and the oil cooling 148 and thus the cooling level 160 of the oil in the Olkühlungs Scheme 148 of the Storage level 162 of the oil in the oil storage area 146 decoupled.
• the decoupling device 164 that during operation of the oil pan 100 and the engine, the cooling level 160 of the Olkühlungs Suites 148, at least in the deep region 104 of the oil pan 100, always above 50%, preferably above 90%, the height of each the oil cooling region 148 adjacent portion of the lateral outer wall 138 is located.
• the cooling level 160 of the oil cooling portion 148 is at or just below the mounting flange 124 of the sump 100, preferably at most about the height H of the mounting flange 124 (see FIG. 7) in the direction of gravity 132 below a lower edge of the mounting flange 124.
• the cooling level 160 of the oil in the oil cooling region 148 which adjoins the lateral outer wall 138 of the oil pan 100, always so high that the majority of the lateral outer wall 138 on its inside in contact with the Olkühlungs Society 148th is located oil.
• the portion of the lateral outer wall 138 in contact with oil in particular under the action of flames and / or heat from the outside of the oil pan 100, is cooled by the oil in the oil cooling region 148, so that the material of the lateral outer wall 138 is at most the oil temperature accepts.
• the structure of the lateral outer wall 138 also retains a high residual stiffness even when exposed to high temperatures and / or direct flame contact, which severely retards or even completely prevents a collapse or breaking of the lateral outer wall 138.
• the partition wall 144 of the decoupling device 164 is preferably formed integrally with the main body 102 of the oil sump 100.
• the main body 102 - including the partition wall 144 - is preferably formed from a thermoplastic plastic material, for example from a polyamide material, in particular from the polyamide 6.6.
• the main body 102 can be produced in an injection molding process, in particular in a cascade injection molding process.
• the partition wall 144 tapers from the bottom wall 142 to its upper edge 154.
• FIGS. 1 to 7 the first embodiment of an oil pan 100 with an oil cooling area 148, which is separated by a partition 144 of an oil storage area 146 in the interior 140 of the oil pan 100, finds only a small exchange between the oil in the oil cooling area 148th and the oil in the oil storage area 146, because only the oil entering the oil cooling area 148 through the oil inlet surface 156 of the oil pan 100 can pass into the oil storage area 146 via the overflow 158, so that the oil within the oil cooling area 148 is only very weak or even does not circulate and thus hardly any exchange with the oil takes place in the oil storage region 146.
• a second embodiment of an oil sump 100 shown in FIGS. 8 to 14 differs from that shown in FIGS.
• This flow guiding device 166 comprises a flow guide element 172, for example in the form of a flow guide wall 174, which extends from the oil inlet 168 above the cooling level 160 in the direction of gravity 132 down into the oil reservoir in the oikühiungs Scheme 148 to the area below 50%, in particular in the Area below 30%, the height of the adjacent to the Oikühiungs Scheme 148 lateral outer wall 138 extends.
• the flow baffle 174 thus divides the oikühi area 148 into an inlet area 176 facing the lateral outer wall 138 of the sump 100 and an outlet area 178 facing the septum 144, the outlet area 178 passing through an oil passage 180 extending from the bottom wall 142 in the direction of gravity 132 up to a lower edge 182 of
• Flow guide wall 174 extends, with the inlet portion 176 in
• the oil passing through the oil inlet 168 into the oxygen region 148 can thus not reach the oil outlet 170 directly and from there, via the overflow 158, into the oil storage region 146; rather, this pushes fresh through the oil inlet 168 into the Inlet portion 176 of the oil cooling section 148 passing oil according to the principle of communicating tubes at the oil outlet 170 of the outlet portion 178 on the cooling level 160 oil through the overflow 158 in the oil storage area 146, whereupon the effluent into the oil storage area 146 oil through from the area of the oil passage 180 am bottom of the oil cooling section 148 rising oil is replaced.
• the oil entering the oil cooling region 148 through the oil inlet 168 is thus gradually conveyed upwards through the inlet region 176 and then upwards through the outlet region 178, so that the entire oil volume from the oil cooling region 148 to the oil outlet 170 successively flows and passes over the overflow 158 in the oil storage area 146, whereby a constant oil exchange is ensured in the Olkühlungs Scheme 148, wherein always in comparison to the storage level 162 in the oil storage area 146 increased cooling level 160 of the oil in the oil cooling area 148 is maintained.
• the oil pan 100 further includes an oil return guide 184 which directs oil entering the oil pan 100 from the engine to the oil inlet 168 of the inlet portion 176 of the oil cooling portion 148.
• this oil return baffle 184 includes an oil return baffle 186 which slopes from an upper edge of the baffle 174 of the baffle 166, at an angle ⁇ to the direction of gravity 132 in the mounted state of the sump 100, into the region vertically above the oil outlet 170 of the outlet portion 178 of the oil cooling portion 148 and preferably also in the region vertically above the oil storage region 146 of the oil pan 100 extends.
• the oil return guide 184 completely covers the oil outlet 170 of the oil cooling area 148.
• the inclination angle ⁇ with respect to the direction of gravity 132 is in the assembled state of the oil pan 100 preferably more than 45 ° and / or less than 80 °.
• the top of the oil return baffle 186 facing away from the bulkhead 144 acts as an oil return baffle 188 which keeps oil coming from the engine away from the oil outlet 170 of the oil cooling area 148 and from a portion of the oil storage area 146 and toward the oil inlet 168 of the oil cooling area 148 ,
• the flow directing device 166 includes transverse webs 190 which are transversely, preferably substantially vertically, aligned with the flow directing wall 174 and in the mounted state of the oil pan 100 from the dividing wall 144 to the lateral outer wall 138 Oil cooling 148 extend.
• each transverse web 190 is preferably guided in a substantially along the direction of gravity 132 aligned guide profile 194 on the inside of the lateral outer wall 138, while an inner edge 196 of each crosspiece 190 preferably in a substantially along the direction of gravity 132 extending guide profile 198th is guided on the side of the outer wall 138 facing the outside of the partition 144.
• the flow guide device 166 and the oil return guide device 184 are preferably formed integrally with each other and may be manufactured separately from the main body 102 of the oil pan 100.
• the flow guide device 166 and the oil return guide device 184 can therefore together form, in particular, an oil guide device 200.
• the ⁇ lleitvorattiiques 200 is preferably made of a thermoplastic plastic material, for example of a polyamide material, in particular of the polyamide 6.6.
• the ⁇ lleitvoratticket 200 is formed of a glass fiber reinforced plastic material, in particular of a glass fiber reinforced polyamide material.
• the ⁇ lleitvoriques 200 may be in an injection molding process, in particular in a cascade injection molding, be prepared.
• the oil-conducting device 200 may in particular be formed from the same material as the main body 102 of the oil pan 100.
• the oil guiding device 200 with its transverse webs 190 can be pushed into the guide profiles 194 and 198 of the lateral outer wall 138 or the partition wall 144.
• the ⁇ lleitvoriques 200 may be releasably held on the main body 102 of the oil pan 100, for example by press-fitting or by positive engagement, in particular by locking.
• the detachable fixing of the oil-guiding device 200 on the main body 102 of the oil sump 100 offers the advantage that the oil-guiding device 200 can be removed from the main body 102 for cleaning or maintenance purposes.
• the in Figs. 8 to 14 illustrated second embodiment of an oil pan 100 in terms of structure, function and method of manufacture with the in Figs. 1 to 7 illustrated first embodiment, the above description of which reference is made.
• the oil sump 100 has a valve device 202 for the temporary Releasing an oil passage in the partition wall 144 in a release state of the valve device 202 includes.
• FIGS. 15 to 23 A first embodiment of such a valve device 202 is shown in FIGS. 15 to 23.
• This valve device 202 comprises a base 204 which is fixable to a portion of the partition wall 144 having an oil passage (not shown).
• the socket 204 carries a valve seat 206 with an oil passageway 208 extending through the socket 204 and the valve seat 206.
• valve body 210 For closing the oil passageway 208 in a closed state of the valve device 202 is a valve body 210, which comprises a bimetallic element 212 in this embodiment.
• the bimetallic element 212 comprises a first layer 213 a of a first material, which faces away from the valve seat 206, and a second layer 213 b of a second material, which faces the valve body 210.
• the first material has a higher coefficient of thermal expansion than the second material in the temperature range from the quiescent temperature of the oil during long operating pauses of the internal combustion engine and the operating temperature of the oil with continued operation of the internal combustion engine.
• the first material and / or the second material is preferably a metallic material.
• a copper-containing material for example, pure copper or a copper alloy may be used.
• an iron-containing material in particular a steel material, for example a spring steel material, in particular the material 1.4310 or material 1.4301 according to DIN EN 10151, can be used.
• FIG. 17 shows a top view of the valve seat 206 facing inside 214 of the valve body 210th
• This inner side 214 can with a, preferably annularly closed, sealing surface 216 made of an elastomeric material, such as AEM
• ethylene acrylate rubber be provided, which surrounds the outlet opening of the Ol microbeskanals 208 in the closed state of the valve device 202.
• the inner side 214 of the valve body 210 is substantially over the entire surface with a coating of an elastomeric material, for example AEM, provided.
• the sealing element 216 is located in the closed state of the valve device 202 preferably on a sealing bead 218, which is arranged on the valve seat 206 and the outlet opening of the Ol micndelskanals 208 annularly closed surrounds.
• the sealing bead 218 may be formed, for example, of a polyamide material.
• the sealing bead 218 may in particular be formed integrally with the valve seat 206.
• the valve seat 206 may in particular be formed integrally with the base 204 of the valve device 202.
• a sealing bead 218 on the valve seat 206 instead of a sealing bead 218 on the valve seat 206, provision may also be made for a sealing lip, for example of an elastomeric material, to be arranged on the inner side 214 of the valve body 210.
• valve seat 206 has one or more holding elements 220, for example in the form of holding pins 222, which with one or more holding elements 224 corresponding thereto on the valve body 210, for example in FIG Form of holding openings 226, are engageable.
• the holding elements 224 of the valve body 210 and the holding elements 220 of the valve seat 206 are connected to each other by force fit, by positive engagement and / or by material connection.
• the holding elements 224 of the valve body 210 and the holding elements 220 of the valve seat 206 are connected to one another by hot-setting or by screwing.
• the valve device 202 is placed with the valve body 210 facing away from abutment surface 228 of the base 204 on an oil passage having portion of the partition 144 and fixed to the partition 144, preferably by material adhesion, in particular by gluing or welding.
• the valve device 202 can be arranged on the inside of the partition wall 144 facing the oil storage region 146. This offers the advantage that more working space is available for fixing the valve device 202 to the dividing wall 144, for example for welding the valve device 202 to the dividing wall 144, in the oil storage region 146 of the oil pan 100, which facilitates the assembly of the valve device 202.
• valve device 202 can also be arranged on the outside of the partition wall 144 facing the oil cooling region 148. This offers the advantage that the increased hydrostatic pressure in the oil cooling region 148 due to the higher cooling level 160 of the oil in the oil cooling region 148 biases the valve body 210 into the closed state on the valve seat 206 and thus supports the closure of the valve device 202.
• the bimetallic element 212 of the valve device 202 is preferably designed so that the valve body 210 at a high oil temperature, as occurs in the continuous operation of the internal combustion engine, takes the form of a substantially flat plate, which with the sealing element 216 substantially fluid-tight at the sealing bead 218th the valve seat 206 is applied.
• the fluid connection between the oil cooling region 148 and the oil storage region 146 is prevented by the oil passage 208 of the valve device 202, so that the desired high cooling level 160 is set in the oil cooling region 148 during operation of the internal combustion engine, which sufficient cooling of the lateral outer wall 138 in the case of Supplying the oil pan 100 with heat and / or flames guaranteed.
• the layer 213a of the first material shrinks more than the second layer 213b of the second material, so that the valve body 210 - in a plan view of the front side facing away from the valve seat 206 Valve body - concave curvature and thus of the
• Valve seat 206 moves away.
• valve device 202 is transferred from the closing state to the release state in which the valve device 202 releases the oil passage in the partition wall 144 so that oil can flow out of the oil cooling section 148 into the oil storage section 146 to exchange oil between the oil cooling section 148 and the oil storage section 146 and thus allow sufficient oil circulation.
• the valve device 202 thus represents a temperature-controlled valve, which is transferred at high oil temperatures in the closed state and is transferred at low oil temperatures in the release state.
• the oil cooling section 148 is divided by transverse walls 150 into a front oil cooling section 148a and a rear oil cooling section 148b, at least one valve device 202 is required for each of these oil cooling sections 148a, 148b.
• valve devices 202 are provided, which preferably on different sides of parallel to the oil pan longitudinal direction 108 and (in the assembled state of the oil pan 100) parallel to the direction of gravity 132 extending vertical longitudinal center plane Sump 100 are arranged.
• valve device 202 is preferably used in the first embodiment of the oil sump 100 shown in FIGS. 1 to 7, but in principle can also be used in the second embodiment of the oil sump 100 shown in FIGS. 8 to 14.
• a in Figs. 24 to 32 illustrated second embodiment of a valve device 202 differs from that shown in FIG. 15 to 23 illustrated first embodiment, in particular in that the bimetallic element 212 in the second embodiment does not serve as a valve body, but as a drive element 232 for driving a movement of the valve body 210 from the closed state to the release state.
• this embodiment of a valve device 202 comprises a base 204, which can be applied with a contact surface 228 to the partition 144 and fixed to the same.
• valve device 202 is preferably provided in that the valve device 202 is arranged on the outside of the partition wall 144 facing the oil cooling region 148.
• the valve device 202 further comprises a valve seat 206 with a - in the assembled state of the oil pan 100 - with respect to the gravitational direction 132 inclined sealing surface 234.
• the inclination angle ß of the sealing surface 234 relative to the direction of gravity 132 is preferably more than 10 ° and / or less than 20 ° ( see Fig. 30).
• An old passageway 208 extends through the socket 204 and the valve seat 206.
• valve body 210 closing the old passageway 208 in the closed state of the valve device 202 is in this embodiment as a
• Valve flap 236 is formed, which is held by two pivot shafts 238 in each case a pivot shaft receiving 240 of the valve seat 206 about a - in the assembled state of the oil pan 100 preferably substantially horizontally oriented - pivot axis 242 pivotally.
• the pivot shaft receptacles 240 of the valve seat 206 can be closed by means of a valve housing cover 244 (shown separately in FIG. 27, for example) in order to retain the pivot shafts 238 of the valve flap 236 in the pivot shaft receptacles 240.
• the valve housing cover 244 can be fixed to the valve seat 206 by material connection, positive locking and / or frictional connection, after the pivot shafts 238 have been introduced into the respectively assigned pivot shaft receptacle 240.
• valve housing cover 244 can be latched to the valve seat 206.
• the valve body 210 has, on its inner side 214 facing the valve seat 206, an annularly closed sealing bead 246 which, in the closed state of the valve device 202, surrounds the outlet opening of the oil passageway 208 and bears against the sealing surface 234 in a substantially fluid-tight manner.
• the sealing bead 246 is preferably formed from an elastomer material, for example from AEM ("ethylene acrylate rubber").
• the sealing bead 246 may in particular be cast or injection-molded onto a base body 248 of the valve body 210, which is formed, for example, from a polyamide material.
• the base body 248 can in particular have an inlet opening 250 and one or more outlet openings 252 for the elastomer material to be injected or injected (see in particular FIG. 28), wherein the outlet openings 252 preferably have cavities in the base body 248 with the inlet opening 250 communicate.
• valve body 210 in this embodiment comprises a spacer element 254, for example in the form of a spacer pin 256 which extends from the inside 214 of the valve body 210 in the direction of the bimetal element 212, which is fixed to the base 204 of the valve device 202 and the inlet opening of Oil passageway 208 crosses (see Fig. 31).
• spacer element 254 for example in the form of a spacer pin 256 which extends from the inside 214 of the valve body 210 in the direction of the bimetal element 212, which is fixed to the base 204 of the valve device 202 and the inlet opening of Oil passageway 208 crosses (see Fig. 31).
• the bimetallic element 212 is preferably connected by one or more holding elements 224, for example in the form of holding openings 226, with one or more respectively associated holding elements 220 of the base 204, for example in the form of holding pins 222, for example by material connection, positive connection and / or adhesion.
• the bimetallic element 212 has a first layer 213a of the first
• the bimetallic element is designed so that in the particular in FIG. 30 illustrated release state of the valve device 202, at the low temperature of rest of the oil, is formed as a substantially flat band.
• valve body 210 rests with the spacer element 154 on the bimetallic element 212 and by the bimetal element 212 from the closed state in the in Fig. 30 deflected release state in which the valve body 210, the outlet opening of the oil passageway 208 releases, so that oil from the oil cooling region 148 can enter the oil storage region 146.
• the cooling level 160 of the oil in the oil cooling area 148 is at the same level as the storage level 162 of the oil in the oil storage area 146.
• the bimetallic element 212 When the oil temperature rises after the engine is put into operation, the bimetallic element 212 is transferred to a concave shape (as viewed from the valve body 210) so that the bimetallic element moves away from the exit port of the oil passageway 208.
• valve body 210 follows this movement of the bimetallic element 212, wherein the spacer element 254 remains in contact with the bimetal 212 until the sealing bead 256 of the valve body 210 is substantially fluid-tight at the Sealing surface 234 of the valve seat 206 is applied.
• valve device 202 is transferred to the closed state in which the oil passage in the partition wall 144 is locked, so that the cooling level 160 of the oil in the oil cooling region 148 is decoupled from the storage level 162 of the oil in the oil storage region 146 and by the influx of oil from the Increase combustion engine to the overflow 158, so that a flame retardant is given over the entire height of the lateral outer wall 138 away.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

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• 2017
  • 2017-03-15 DE DE102017105539.8A patent/DE102017105539A1/de not_active Withdrawn
• 2018
  • 2018-03-07 EP EP18710818.8A patent/EP3596318B1/de active Active
  • 2018-03-07 WO PCT/EP2018/055556 patent/WO2018166857A1/de unknown
  • 2018-03-07 CN CN201880017897.5A patent/CN110431288A/zh active Pending
• 2019
  • 2019-09-12 US US16/569,022 patent/US20200003092A1/en not_active Abandoned

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