OIL SUMP, IN PARTICULAR OIL FILTER MODULE, WITH A MULTI-PART HOUSING

Abstract

An oil sump for supplying an assembly of a motor vehicle, including: a housing including a housing frame, a housing base and a housing cover; and an oil accommodating space enclosed by the housing, and a suction channel which extends into the oil accommodating space and includes an opening via which oil can be delivered or suctioned from the oil accommodating space through the suction channel. The housing frame is arranged between the housing cover and the housing base. The housing frame itself and/or the housing frame together with the housing base and/or the housing cover forms one or more oil channels.

Claims

1.-17. (canceled)

18. An oil sump for supplying an assembly of a motor vehicle, comprising: a housing comprising a housing frame, a housing base and a housing cover; an oil accommodating space enclosed by the housing, and a suction channel which extends into the oil accommodating space and comprises an opening via which oil can be delivered or suctioned from the oil accommodating space through the suction channel, wherein: the housing frame is arranged between the housing cover and the housing base; and the housing frame itself and/or the housing frame together with the housing base and/or the housing cover forms one or more oil channels.

19. The oil sump according to claim 18, wherein the housing cover is joined to the housing frame by means of a joining connection or a material-fit joining connection.

20. The oil sump according to claim 18, wherein the housing base is joined to the housing frame by means of a joining connection or a material-fit joining connection.

21. The oil sump according to claim 18, wherein the oil sump comprises or integrally forms an oil filter receptacle for accommodating an oil filter.

22. The oil sump according to claim 21, wherein the housing or the housing frame comprises or integrally forms the oil filter receptacle.

23. The oil sump according to claim 21, wherein the oil channel or one of the oil channels is connected in fluid communication with the oil filter receptacle or emerges into the oil filter receptacle.

24. The oil sump according to claim 21, wherein the oil sump comprises at least one supply outlet which is embodied to supply oil to an assembly, and the oil channel or one of the oil channels connects the oil filter receptacle and the at least one supply outlet in fluid communication, such that oil can be delivered from the oil filter receptacle to the at least one supply outlet through the oil channel.

25. The oil sump according to claim 18, wherein the oil sump or the housing cover comprises a feedback inlet or multiple feedback inlets for feeding oil from the assembly back into the oil sump and a pump inlet port for delivering fluid from the oil sump into a pump, wherein the oil channel or one of the oil channels connects the feedback inlet or one of the feedback inlets to the pump inlet port, such that oil can be delivered from the feedback inlet to the pump inlet port through the oil channel.

26. The oil sump according to claim 18, wherein the oil sump comprises at least one pump outlet port for delivering fluid from the pump into the oil sump, wherein the oil channel or one of the oil channels connects the pump outlet port to the oil accommodating space, such that oil can be delivered from the pump outlet port into the oil accommodating space through the oil channel.

27. The oil sump according to claim 18, wherein the oil sump or the housing cover comprises a feedback inlet or multiple feedback inlets for feeding oil from the assembly back into the oil sump, wherein the feedback inlet or one of the feedback inlets emerges into the oil accommodating space, such that oil can be delivered from the feedback inlet directly into the oil accommodating space or into a first section or second section of the oil accommodating space.

28. The oil sump according to claim 18, wherein the oil sump or the housing cover comprises a feedback inlet for feeding oil from the assembly back into the oil sump, wherein the opening of the suction channel is arranged below or in a projection of the feedback inlet, and/or a deflector which is for example plate-shaped and is arranged between the feedback inlet and the opening is configured such that oil which flows from the feedback inlet into the oil sump flows against the deflector which prevents oil which flows from the feedback inlet into the oil sump from flowing directly onto the opening.

29. The oil sump according to claim 18, wherein at least one of the housing frame and the housing cover comprises at least one channel portion or a groove-shaped channel portion on its side pointing towards the housing cover or housing frame, respectively, wherein said at least one channel portion is covered by the other of the housing cover and the housing frame in order to form a closed cross-section of the one or more oil channels.

30. The oil sump according to claim 29, wherein said at least one channel portion is covered by at least one corresponding groove-shaped channel portion.

31. The oil sump according to claim 18, wherein the suction channel is embodied as a suction pipe which is inserted into a channel receptacle integrally formed by the housing, in particular the housing frame, wherein a gasket is preferably arranged between the suction pipe and the channel receptacle for sealing off a gap formed between the suction pipe and the channel receptacle.

32. The oil sump according claim 30, wherein the housing frame forms a passage which connects the channel receptacle and a pump inlet port in fluid communication, such that oil can be delivered from the suction channel to the pump via the pump inlet port.

33. The oil sump according to claim 18, wherein the housing or the housing frame (comprises or integrally forms a sensor receptacle to which a peripheral or a temperature sensor, can be fastened and which is configured such that it can ascertain a measurement value or a temperature, in the oil channel or in one of the oil channels.

34. An oil delivery module which comprises an oil sump according claim 18 and a pump, wherein a first pump inlet of the pump is connected in fluid communication with the suction channel, such that oil can be delivered from the oil accommodating space into the pump via the suction channel, and a first pump outlet of the pump is connected in fluid communication with the oil sump or the oil channel, such that oil can be delivered from the pump into the oil sump or into the oil channel.

35. The oil delivery module according to claim 34, wherein the oil sump comprises an oil filter receptacle, wherein the first pump outlet is connected in fluid communication with the oil filter receptacle.

36. The oil delivery module according to claim 34, wherein a heat exchanger which is arranged between the first pump outlet and the oil sump or an oil filter receptacle of the oil sump is configured such that oil delivered from the first pump outlet to the oil sump can flow through the heat exchanger.

37. An oil delivery module which comprises an oil sump according to claim 18, wherein a pump inlet or a second pump inlet of a pump is connected in fluid communication with one of the oil channels, and a pump outlet or a second pump outlet of the pump is connected in fluid communication with another of the oil channels, such that oil can be delivered from the one oil channel into the other oil channel by means of the pump.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0033] An aspect of the invention has been described on the basis of multiple preferred embodiments and examples. An embodiment of the invention is described below on the basis of figures. The features thus disclosed, individually and in any combination of features, advantageously develop the subject matter of an aspect of the invention. There is shown:

[0034] FIG. 1 an oil delivery module comprising an oil sump, a pump and a heat exchanger for attaching to a machine assembly;

[0035] FIG. 2 the oil delivery module from FIG. 1, with its components shown in an exploded view;

[0036] FIG. 3 a perspective view of an assembled oil sump;

[0037] FIG. 4 the oil sump from FIG. 3, with parts of it shown individually;

[0038] FIG. 5 a plan view onto a housing frame of the oil sump comprising a suction channel;

[0039] FIG. 6 a perspective view of the parts from FIG. 5; and

[0040] FIG. 7 a perspective view of a pump.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0041] FIGS. 1 and 2 show an oil delivery module 100 which comprises an oil sump 1, a pump 3 comprising a drive 2, an oil filter receptacle 11 comprising an oil filter 5, and a heat exchanger 4. The oil sump 1, which in the example embodiment is embodied as an oil filter module, forms the oil filter receptacle 11 into which the oil filter 5 is inserted. In alternative embodiments, the oil delivery module 100 can comprise a separate oil filter receptacle 11, i.e. one which is not formed integrally with a housing 10, 20, 30 of the oil sump 1, into which the oil filter 5 is or can be inserted, wherein it is however preferable in such embodiments for the oil filter receptacle 11 to be connected in fluid communication with the oil channel 15 shown in the figures, in particular via a conduit or channel, for which purpose the oil sump 1 or its housing 10, 20, 30 or housing frame 10 can comprise a port for connecting to the oil filter receptacle 11.

[0042] The oil delivery module 100 serves to feed oil to a machine assembly, such as for example an electric motor transmission unit, in particular for a motor vehicle, for the purpose of cooling and/or lubricating and to accommodate the returning oil and make it available for feeding to the assembly again. For this purpose, the oil delivery module 100 is fastened to the assembly via the upper side of the oil sump 1 on which supply outlets 31, 32 are situated. In the example shown, the supply outlets 31, 32 are formed by a housing cover 30. Oil is fed to the assembly via the supply outlets 31, 32. Oil can for example be fed to the electric motor via one of the supply outlets 31, 32 and to the transmission via the other of the supply outlets 31, 32. Feedback inlets 33, 34, via which oil which flows back from the assembly is fed to the oil sump 1, are also arranged on the upper side of the oil sump 1. In the example shown, the feedback inlets 33, 34 are formed by the housing cover 30. Oil can for example be guided from the electric motor back into the oil sump 1 or oil delivery module via one of the feedback inlets 33, 34 and from the transmission back into the oil sump 1 or oil delivery module via the other of the feedback inlets 33, 34. In the example embodiment shown, the oil sump 1 and therefore the components of the oil delivery module 100 which are fastened to it are fastened to the assembly by means of multiple stud bolts 22 (FIG. 1). The housing 10, 20, 30 of the oil sump 1 is clamped between a head of the stud bolt 22 and the assembly.

[0043] As shown for example in FIGS. 3 and 4, the oil sump 1 comprises a housing 10, 20, 30 which comprises a housing frame 10, a housing base 20 and a housing cover 30. The housing frame 10 is arranged between the housing cover 30 and the housing base 20. The housing frame 10 forms a circumferential side wall, wherein the housing base 20 is attached to the downwardly pointing end-facing side of the circumferential side wall and the housing cover 30 is attached to the upwardly pointing end-facing side of the circumferential side wall. The circumferential side wall comprises four side wall portions which together surround, for example rectangularly, an oil accommodating space 18. In the example embodiment, the housing cover 30 and the housing base 20 are arranged parallel to each other, and the four side wall portions are of equal height. In a variant of the embodiment shown in the figures, opposing side wall portions can be of different heights, and the two side wall portions which connect the opposing side wall portions can be embodied to be wedge-shaped, whereby the housing cover 30 and the housing base 20 are arranged obliquely, in particular at an acute angle, with respect to each other. The variant enables a particularly compact design of the oil sump which nonetheless affords sufficient space on the higher of the opposing side wall portions for, for example, an oil filter receptacle 11 and optionally a sensor receptacle 6a and the pump ports 12, 13, 14 which are explained further below. The side wall shown in the example embodiment likewise requires little space, but is not quite as compact as the variant, although it is somewhat simpler in design.

[0044] In the example embodiment, the housing base 20 is kept simple as compared to the housing frame 10 and the housing cover 30. The housing base 20 closes off an oil accommodating space 18 from below and is embodied to be substantially plate-shaped. The more complex housing frame 10 and housing cover 30 together form oil channels 15, 16, 17. The housing cover 30 closes off the oil accommodating space 18 from above. The housing frame 10 is open towards the top and bottom and is closed off in a fluid-tight seal by the housing base 20 mounted at the top and the housing cover 30 mounted at the bottom. The housing frame 10 integrally forms an oil filter receptacle 11, a sensor receptacle 6a and the pump ports 12, 13, 14.

[0045] The housing frame 10, the housing base 20 and the housing cover 30 can for example be made of plastic. In particular, the housing base 20 can be connected to the housing frame 10, and the housing cover 30 can be connected to the housing frame 10, by gluing or welding. The housing frame 10, housing base 20 and housing cover 30 can optionally be screwed to each other.

[0046] The housing base 20 comprises an oil draining device in the form of an oil draining screw 21. The oil draining screw 21 is screwed into an internal thread of the housing base 20 and can be removed in order to drain the oil.

[0047] The housing 10, 20, 30 forms an oil sump with the oil accommodating space 18 which it encloses. The oil which flows back from the assembly is stored in the oil accommodating space 18, wherein oil can be suctioned from the oil accommodating space 18 by means of the pump 3 and fed to the assembly again.

[0048] The oil sump 1 also comprises a suction channel 12a which extends into the oil accommodating space 18 and which comprises an opening 12b via which oil can be suctioned from the oil accommodating space 18 by the pump 3 through the suction channel 12a. In the example embodiment shown, the suction channel 12a is embodied as a suction pipe, one end of which is inserted into a channel receptacle 12c of the housing frame 10. A gap between an inner circumference of the channel receptacle 12c and an outer circumference of the tubular suction channel 12a is sealed off by means of a gasket 12e (FIG. 6). The housing frame 10 forms a passage which connects a first pump inlet port 12, which is formed on the outer side of the housing frame 10, and the channel receptacle 12c which is formed on the inner side of the housing frame 10, whereby oil can be delivered from the oil sump 18 to the first pump inlet port 12 via the suction channel 12a and the passage. This passage crosses the oil channels 15 and 17 (FIG. 5). A first pump inlet 3c (FIG. 7) of the pump 3 can be or is connected to the first pump inlet port 12. This enables the pump 3 to suction oil from the oil accommodating space 18.

[0049] The housing 10, 20, 30, in particular the housing frame 10, comprises a partition wall 19 which sub-divides the oil accommodating space 18 into a first section 18a and a second section 18b. The second section 18b exhibits a smaller volume than the first section 18a. The suction channel 12a extends from the channel receptacle 12c, through the second section 18b and the partition wall 19, into the first section 18a. The suction opening 12b is arranged in the first section 18a. Oil is thus suctioned from the first section 18a.

[0050] The partition wall 19 also comprises a passage 19a which connects the first section 18a and the second section 18b in fluid communication with each other. The passage 19a causes a throttled exchange of fluid between the sections 18a and 18b. On the one hand, the passage 19a allows oil to flow from the second section 18b into the first section 18a. On the other hand, the passage 19b allows oil to be able to flow from the first section 18a into the second section 18b, for example if so much oil is delivered into the first section 18a that it became overfilled.

[0051] An oil filter receptacle 11, into which the oil filter 5 or an oil filter insert can be inserted, is arranged on the housing frame 10. The oil filter receptacle 11 is connected in fluid communication with a first supply outlet 31 and a second supply outlet 32 via a first oil channel 15. The assembly is connected in fluid communication with the first and second supply outlets 31, 32, such that oil can be delivered from the oil filter receptacle 11 to the supply outlets 31, 32 and therefore into the assembly via the first oil channel 15. In order to be able to differentiate it conceptually, the first oil channel 15 can optionally be referred to as the assembly supply channel. The first oil channel 15 is formed between the housing frame 10 and the housing cover 30 which is joined to the housing frame 10. In the embodiment shown, the housing frame 10 and the housing cover 30 together form the first oil channel 15. The end-facing side of the housing frame 10 which points towards the housing cover 30 comprises a channel portion of the first oil channel 15 which is embodied to be groove-shaped in the longitudinal direction or flow direction of the channel. The housing cover 30 covers the groove-shaped channel portion of the first oil channel 15, in order to form a closed cross-section of the channel. In the example embodiment shown, the housing cover 30 likewise comprises a groove-shaped channel portion which covers and is embodied to be congruent with the groove-shaped channel portion of the housing frame 10. In principle, however, embodiments are also possible in which the housing cover is embodied to be flat, i.e. not groove-shaped, in the portion which covers the groove-shaped channel portion of the housing frame 10.

[0052] The first oil channel 15 branches off, at the oil filter receptacle 11 or a filter outlet 15a at which the oil from the oil filter 5 enters the first oil channel 15, into a first branch leading to the first supply outlet 31 and a second branch leading to a second supply outlet 32. The first supply outlet 31 is situated at or above a transfer point, the position of which is shown by way of example by the reference sign 31a in FIG. 5. The second supply outlet 32 is situated at or above a transfer point, the position of which is shown by way of example by the reference sign 32a in FIG. 5. The fluid suctioned by the pump 3 via the suction channel 12a is delivered into the oil filter receptacle 11, where it is filtered of impurities by the oil filter 5, via a first pump outlet 3a which is connected in fluid communication with the oil filter receptacle 11. The filtered oil is delivered to the supply outlets 31, 32 via the first oil channel 15 and fed to the assembly.

[0053] A heat exchanger 4 which serves as an oil cooler is arranged between the first pump outlet 3a and the oil filter 5 or oil filter receptacle 11. The oil delivered to the oil filter receptacle 11 by the pump 3 via the first pump outlet 3a flows through the heat exchanger 4, where it discharges thermal energy to a cooling medium. The cooling medium is fed to the heat exchanger 4 via a coolant inlet 4a and drained from the heat exchanger 4 via a coolant outlet 4b. In the heat exchanger 4, the thermal energy discharged by the oil is transferred to the coolant which flows through the heat exchanger 4 and is removed from the heat exchanger by the coolant. The mass flow of the coolant through the heat exchanger 4 can for example be controlled by means of a valve in order to be able to adjust the temperature of the oil in the oil filter system 100.

[0054] In the example embodiment shown, the housing 10, 20, 30, in particular the housing frame 10, comprises a sensor receptacle 6a into which a temperature sensor 6 can be inserted (FIG. 2) which is configured such that it can measure the temperature of the oil which flows through the first oil channel 15, in particular the second branch of the first oil channel 15. A signal which is outputted by the temperature sensor 6 and contains information regarding the oil temperature can be outputted to a control unit or regulation unit which, in accordance with the temperature measured, actuates the valve which controls the mass flow of the coolant through the heat exchanger 4. The valve can in particular be actuated such that the mass flow through the heat exchanger 4 is reduced or blocked if the temperature measured by the temperature sensor 6 is lower than a target temperature. The valve can for example be actuated such that it initiates or increases the mass flow of the coolant flowing through the heat exchanger 4 if the temperature measured by the temperature sensor 6 exceeds the target temperature of the oil.

[0055] The oil sump 1, in particular the housing cover 30 and/or the housing frame 10, comprises a first feedback inlet 33 which can guide oil from the assembly into the oil sump 1. The first feedback inlet 33 is arranged on the upper side of the oil sump 1 or on the side of the oil filter module 1 which points towards the assembly. A second oil channel 16 which is arranged or formed between the housing frame 10 and the housing cover 30 connects the first feedback inlet 33 in fluid communication with a second pump inlet port 13 which is formed by the housing frame 10 on its outer side. A passage which is formed by the housing frame 10 and connects the second pump inlet port 13 in fluid communication with the second oil channel 16 crosses the first oil channel 15 and a third oil channel 17 in the example shown and emerges into the second oil channel 16 at a passage opening 13a (FIG. 5). A second pump inlet 3d (FIG. 7) which is formed on the pump 3 can be or is connected to the second pump inlet port 13. Oil which is guided from the assembly back into the first feedback inlet 33 can thus be suctioned by the pump 3 via the second oil channel 16 and the second pump inlet port 13. In order to be able to differentiate it conceptually, the second oil channel 16 can optionally be referred to as the feedback suction channel. The first feedback inlet 33 is situated at a transfer point into the oil channel 16, the position of which is shown by way of example by the reference sign 33b in FIG. 5.

[0056] The oil suctioned by the pump 3 via the second pump inlet 3d is delivered via a second pump outlet 3b of the pump 3 into the first section 18a via a third oil channel 17 which emerges into the oil accommodating space 18, in particular into its first section 18a, for example via an opening 17a shown in FIG. 5. In order to be able to differentiate it conceptually, the third oil channel 17 can optionally be referred to as the feedback supply channel. A passage which is formed by the housing frame 10 and connects the second pump outlet port 14 in fluid communication with the third oil channel 17 crosses the first oil channel 15 in the example shown and emerges into the third oil channel 17 at a passage opening 14a (FIG. 5). The passage which connects the second pump outlet port 14 and the third oil passage 17 is arranged between the first oil passage 15 and the passage which connects the second pump inlet port 13 and the second oil passage 16.

[0057] The outer side of the housing frame 10 comprises a pump outlet port 14 which can be or is connected to the second pump outlet 3b of the pump 3. The pump outlet port 14 is connected in fluid communication with the first section 18a via the third oil channel 17.

[0058] The housing frame 10 and the housing cover 30 together form the second oil channel 16 and the third oil channel 17, respectively. The end-facing side of the housing frame 10 which points towards the housing cover 30 comprises a groove-shaped channel portion which is open towards the housing cover 30 in the flow direction of the channel and covered by the housing cover 30, in particular a flat or groove-shaped channel portion, in order to form a closed cross-section of the channel. The same applies analogously to the third oil channel 17, i.e. the end-facing side of the housing frame 10 which points towards the housing cover 30 comprises a groove-shaped channel portion which is open towards the housing cover 30 in the flow direction of the channel and covered by the housing cover 30 in order to form a closed cross-section of the channel.

[0059] In the example embodiment shown, the oil channels 15, 16, 17 are each formed by a groove-shaped channel portion, which is formed on the housing frame 10, and the housing cover 30 which covers the groove-shaped channel portions. Such an embodiment allows the design to be space-saving and the oil channels 15, 16, 17 to be manufactured in a simple way.

[0060] The pump 3 shown in FIG. 7 is a dual-flux pump comprising two separate fluid circuits. The pump 3 can deliver the first fluid circuit to the pump outlet 3a via the pump inlet 3c. The pump 3 can additionally deliver the second fluid circuit, which is separate from the first fluid circuit and is for example designed for bilge operations, from the second pump inlet 3d to the second pump outlet 3b. The pump 3 can in particular comprise two delivery elements: one for the first fluid circuit and one for the second fluid circuit. Alternatively, two mutually separate pumps can be provided instead of one dual-flux pump. The pump 3 shown in FIG. 7 is driven by a drive 2 which is arranged on it. The drive 2 is an electric motor. The drive 2 can comprise a plug receptacle 2a to which a power supply for driving the pump 3 can be connected.

[0061] The oil sump 1, in particular the housing frame 10 and/or the housing cover 30, comprises a second feedback inlet 34, which emerges directly into the first section 18a of the oil sump 18, on its upper side or on the side pointing towards the assembly. Oil can thus flow from the assembly back into the first section 18a directly and/or due to gravity, without having to be delivered into the first section 18a by the pump 3 and/or having to go via the pump 3. A deflector 12d, which is for example plate-shaped and is arranged between the second feedback inlet 34 and the suction opening 12b of the suction channel 12a, is configured such that it prevents the fluid which flows back into the first section 18a via the second feedback inlet 34 from flowing directly onto the suction opening 12b. On the one hand, this enables the oil which flows back to be calmed and on the other hand reduces the introduction of air into the oil which is already situated in the first section 18a. The deflector 12d, which is in particular formed by or on the suction channel 12a, can for example be embodied to be plate-shaped and/or above the suction opening 12b or, as in the embodiment shown in the figures, collar-shaped and circumferential around the suction end of the suction pipe 12a. The deflector 12d can extend parallel or approximately parallel to the housing base 20.

[0062] A filter screen 33a is arranged in the first feedback inlet 33, such that the oil which flows from the assembly back into the first feedback inlet 33 flows through the screen 33a. The screen 33a can in particular span the full flow cross-section of the first feedback inlet 33.

[0063] A filter screen 34a is arranged in the second feedback inlet 34, such that the oil which flows from the assembly into the second feedback inlet 34 flows through the screen 34a. The screen 34a can in particular span the entire flow cross-section of the second feedback inlet 34.

[0064] The pump inlet port 13 can be inserted into the second pump inlet 3d. The gap formed between the outer circumference of the pump inlet port 13 and the inner circumference of the pump inlet 3d can be sealed off by means of a gasket 3e. The pump outlet port 14 can be inserted into the pump outlet 3b. The gap formed between an outer circumference of the pump outlet port 14 and an inner circumference of the pump outlet 3b can be sealed off by means of a gasket 3e.

[0065] The pump inlet port 12 can be inserted into the pump inlet 3c. The gap formed between an outer circumference of the pump inlet port 12 and an inner circumference of the pump inlet 3c can be sealed off by means of a gasket 3e. The gaskets 3e can for example be embodied as a sealing ring or O-ring.

[0066] The flow cross-section of the second feedback inlet 34 is larger than the flow cross-section of the first feedback inlet 33.

LIST OF REFERENCE SIGNS

[0067] 1 oil sump [0068] 2 drive [0069] 2a plug receptacle [0070] 3 pump [0071] 3a (first) pump outlet [0072] 3b (second) pump outlet [0073] 3c (first) pump inlet [0074] 3d (second) pump inlet [0075] 3e gaskets [0076] 4 heat exchanger [0077] 4a coolant inlet [0078] 4b coolant outlet [0079] 5 oil filter [0080] 6 temperature sensor [0081] 6a sensor receptacle [0082] 10 housing frame [0083] 11 oil filter receptacle [0084] 12 (first) pump inlet port [0085] 12a suction channel/support/pipe [0086] 12b opening/suction opening [0087] 12c channel receptacle [0088] 12d deflector [0089] 12e gasket [0090] 13 (second) pump inlet port [0091] 13a passage opening [0092] 14 pump outlet port [0093] 14a passage opening [0094] 15 (first) oil channel/assembly supply channel [0095] 15a filter outlet [0096] 16 (second) oil channel/feedback suction channel [0097] 17 (third) oil channel/feedback supply channel [0098] 17a opening [0099] 18 oil accommodating space [0100] 18a first section [0101] 18b second section [0102] 19 partition wall [0103] 19a passage [0104] 20 housing base [0105] 21 oil draining device/screw [0106] 22 stud bolt [0107] 30 housing cover [0108] 31 first supply outlet [0109] 31a transfer point [0110] 32 second supply outlet [0111] 32a transfer point [0112] 33 (first) feedback inlet [0113] 33a filter screen [0114] 33b transfer point [0115] 34 (second) feedback inlet [0116] 34a filter screen [0117] 100 oil delivery module