WO1999059696A1 - Device in an appliance for the treatment of oil for lubrication of an engine - Google Patents

Device in an appliance for the treatment of oil for lubrication of an engine Download PDF

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Publication number
WO1999059696A1
WO1999059696A1 PCT/SE1999/000881 SE9900881W WO9959696A1 WO 1999059696 A1 WO1999059696 A1 WO 1999059696A1 SE 9900881 W SE9900881 W SE 9900881W WO 9959696 A1 WO9959696 A1 WO 9959696A1
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WO
WIPO (PCT)
Prior art keywords
oil
opening
wall
pipe
inlet
Prior art date
Application number
PCT/SE1999/000881
Other languages
French (fr)
Inventor
Erik Hedman
Original Assignee
Purolator Products Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Purolator Products Company filed Critical Purolator Products Company
Priority to AU45412/99A priority Critical patent/AU4541299A/en
Publication of WO1999059696A1 publication Critical patent/WO1999059696A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
    • B01D35/147—Bypass or safety valves
    • 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
    • F01M11/03—Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/15—Supported filter elements arranged for inward flow filtration
    • B01D29/21—Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/23—Supported filter elements arranged for outward flow filtration
    • B01D29/232—Supported filter elements arranged for outward flow filtration with corrugated, folded or wound sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/18—Heating or cooling the filters
    • 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
    • F01M5/002—Cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/16—Valves
    • B01D2201/162—Valves with snap, latch or clip connecting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/31—Other construction details
    • B01D2201/316—Standpipes
    • 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
    • F01M11/03—Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means
    • F01M2011/031—Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means characterised by mounting means
    • F01M2011/033—Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means characterised by mounting means comprising coolers or heat exchangers

Definitions

  • the present invention relates to arrangements for oil filters, particularly to pressure relief systems for such filters.
  • the object of the present invention is to produce such a valve which is simple and functionally reliable. This is achieved by the characteristic features according to the characterising part of claim 1.
  • the subordinate claims indicate advantageous design details of the invention, which will be explained further below with reference to the drawing attached.
  • fig. 1 shows, diagrammatically in an axial section, an oil filter cooler with a valve device according to the invention.
  • Fig. 2 is a detailed view A-A from fig. 1 on an enlarged scale, which shows the valve device in the closed position.
  • Fig. 3 shows the valve device in a cross-section along a line B-B in fig. 2.
  • Fig. 4 is a detailed view A-A similar to that in fig. 2, but with the valve device in the open position.
  • Fig. 5 shows the valve device in the cross-section B-B according to fig. 3 but in the open position.
  • Fig. 6, in a cross-section according to fig. 3, shows an alternative embodiment of a spring forming part of the valve device.
  • Fig. 1 shows, diagrammatically in an axial section, an oil filter cooler with a valve device according to the invention.
  • Fig. 2 is a detailed view A-A from fig. 1 on an enlarged scale, which shows the valve device in the closed position.
  • Fig. 7 is a detailed view C-C from fig. 7 on an enlarged scale, showing the valve device in the closed position and fig. 9 shows the valve device in a cross-section along a line
  • FIG. 8 D-D in fig. 8.
  • Figures 10-12 in cross-section D-D through the valve device similar to fig. 9, show alternative embodiments of a spring forming part of the valve device.
  • Figures 13 and 14 show an alternative embodiment for use when oil flows into the filter assembly through a central tube and figs. 15 and 16 show an embodiment for use when oil flows out of a central tube.
  • fig. 1 generally denotes an oil filter cooler
  • 2 denotes an engine block adapted to the oil filter cooler 1 or an intermediate piece, which forms an adapter between a conventional engine block and the oil filter cooler.
  • the embodiment of fig. 1 is hereafter described with reference to such an adapted engine block.
  • the oil filter cooler 1 has an outer wall la, an intermediate wall lb and an inner wall lc, a base Id and a cover le.
  • the inner wall lc, the base Id and the cover le form a cylindrical container, which encloses a filter material 3.
  • the latter is preferably composed of paper, folded so as to form a tubular casing.
  • An outer circulation chamber 4 is situated between the outer wall la and the intermediate wall lb.
  • An inner circulation chamber 5 is defined by the intermediate wall lb, the inner wall lc, the base Id and an outwardly pointing flange lcl, arranged on the inner wall.
  • the outer circulation chamber 4 is designed to accommodate the through- flow of coolant and therefore connects with the ducts 2c, 2d.
  • the inner circulation chamber 5 which is intended to accommodate the through- flow of oil, connects on the one hand with the filter material container via an opening lc2 in the inner wall lc and on the other with the duct 2b for cleaned oil.
  • the cover le is detachably joined by means of a threaded connection to one end of a pipe 6 that extends axially in the oil filter cooler 1 and the other end of which, detachably joined to the engine block 2 by means of a further threaded connection, projects out of the oil filter cooler 1.
  • the inside of the pipe 6 is connected by at least one opening 6a in the pipe wall to the filter material container.
  • the coolant flows into the duct 2c, out of the engine block 2 and into the outer circulation chamber 4 where, through the intermediate wall lb, it absorbs heat from the oil in the inner circulation chamber 5, following which the coolant flows via the duct 2d back into the engine block 2 as indicated by an arrow 8.
  • Contaminated and warm oil leaves the engine block 2 via the duct 2a, flows via the inside of the pipe 6 and the opening 6a out into the filter material container.
  • the oil is cleaned as it passes through the filter material 3 and the cleaned oil flows via the opening lc2 into the inner circulation chamber 5, where it is cooled.
  • the oil, thus cooled and cleaned, leaves the inner circulation chamber 5 and flows via the duct 2b into the engine block, as indicated by arrows 10.
  • the oil direction of flow indicated above is advantageous, in the inverse direction of flow there is a certain risk that impurities from the unfiltered oil will become stuck in the inner flow chamber 5, impairing the flow through this. Contaminated filter material can easily be renewed after screwing off the cover le.
  • the oil filter assembly includes a valve 11 which is designed to open in the event of oil pressure in excess of a predetermined value, thereby producing a connection between inlet of the oil filter cooler and its outlet.
  • the pipe section has a circular cross-section but may also have some other cross-section.
  • the pipe section has two opposing bores 1 la, 1 lb, the orifices of which in the filter material container have conical bevels Hal, 1 lbl as will clearly be seen from fig. 4.
  • a spring lie the shape of which corresponds to the cross-sectional shape of the pipe section, extends over a part of the circumference and has a break in the form of a relatively wide slit. Symmetrically placed in relation to the slit and right in front of the openings 11a, 1 lb are valve cones l id, l ie, connected to the spring, which may also be integrally formed with the spring l ie.
  • the valve cones are of hemispherical shape and fit tightly against the bevels Hal, 1 lbl, which form the valve seats.
  • the oil pressure at which the valve opens is determined by the spring constant of the spring, which in turn naturally depends, among other things, on the thickness of material.
  • the degree of opening of the valve is determined by the oil pressure; within certain limits a fairly linear ratio prevails.
  • FIGS 2, 4 and 3,5 illustrate the closed and open position of the valve respectively.
  • the flow, marked by the arrow 9 in fig. 1 passes the valve 11 unimpeded, as marked by an arrow 12 in fig. 2.
  • the oil flow marked by the arrow 9 is divided up into three partial flows, as illustrated by arrows 12a, 12b, 12c in fig. 4, the flows marked by the arrows 12a, 12b flowing via bores 11a, 1 lb directly to the outlet duct 2c, whilst the oil flow marked by the arrow 12c continues into the oil filter.
  • the ratio between these flows naturally depends, among other things, on the degree of clogging of the filter.
  • Fig. 6 illustrates a method of adjusting the opening pressure of the valve by making a part of the spring describe a U-shape llcl: the leg length of the U-shape llcl influences the rigidity of the spring and thereby the opening pressure.
  • the embodiment of the oil filter cooler in fig. 7 corresponds to the embodiment shown in fig. 1 except in one important respect, the oil flow here is in the inverse direction, that is the contaminated oil first passes through the inner circulation chamber 5, where it is cooled, following which it passes through the oil filter.
  • contaminated oil flows up through the duct 2b, as indicated by arrows 13, whilst cooled and filtered oil flows down through the duct 2a, as indicated by an arrow 14.
  • the valve, which in fig 7 must have the inverse function relative to the valve in fig. 1 , is denoted in fig.
  • valve 7 by 11' and comprises a spring l l 'c, arranged inside the pipe section, with valve cones l id', He', which fit in bores 11a', lib'.
  • the valve 11' is opened when the oil pressure exceeds a certain value.
  • the spring lie' has a plurality of alternative embodiments.
  • the valve cones l id', He' are integrated into an annular hoop, which is pre-tensioned so that at an oil pressure less than the opening pressure of the valve there is a degree of play in relation to the wall of the pipe 6 that allows the valve cones to lift or seat when the valve opens.
  • the spring in fig. 10 comprises two essentially identical halves 1 lc' 1 and 1 lc'2, which telescopically nest one inside the other, whilst the springs in fig. 11 have an overlapping section 1 lc'3.
  • the springs l ie' have a pair of legs 1 lc'4, which help to facilitate fitting and dismantling of the springs.
  • Fig 13 shows an additional embodiment of the present invention in which oil is admitted to the filter medium 3 via a central pipe 6', as shown by arrow 20.
  • Pipe 6' comprises internal threads 21 for engagement with an oil outlet pipe (not shown) as is common on internal combustion engines. Oil exits the filter as shown by arrows 23 and is received by the engine through a mating surface (not shown).
  • the filter assembly of fig. 13 also includes a cooling fluid inlet 30 and an outlet 32 for coolant to cool the oil in the oil filter. The cooling properties of this apparatus are discussed in the aforementioned United States Patent Application No. 09/082,751.
  • the filter assembly also includes a pipe 25 having an inner opening which has a diameter larger than the exterior diameter of inlet pipe 6'. The difference between the inner diameter of pipe 25 and the outer diameter of pipe 6' defines an annular channel 27 which is in fluid and pressure communication between the outlet oil (23) and a pair of bores 1 If and 11.
  • Fig 14 shows in greater detail the bores l ie and lid which provide a possible oil passage between the oil entering pipe 6' and the oil outlet.
  • the bores 1 If and 11 g are selectively sealed by valve cones of a spring 1 lh.
  • valve cones When the inlet oil pressure in pipe 6' exceeds the outlet oil pressure by less than a predetermined amount, the valve cones seal the bores as a result of action by the spring 1 lh. When the inlet pressure is greater that the outlet pressure by more than the predetermined amount, the valve cones are forced open and oil flows through bores 11 f and 1 lg along channel 27 to the outlet.
  • Figs. 15 and 16 show an embodiment in which the oil filter assembly of fig. 13 is equipped for reversed direction oil flow.
  • oil flows out through the central pipe 35 and into the filter 37 around its perimeter.
  • This embodiment includes a valve assembly which includes a resilient member 1 lc' sealing a pair of bores.
  • This valve assembly functions in accordance with the embodiment of fig. 7 to relieve oil pressure when the pressure of the inlet side exceeds the pressure of the outlet side by more than a predetermined amount.

Abstract

The invention relates to a device in an appliance for the treatment of oil for the lubrication of an engine, preferably an oil filter and/or an oil cooler for an internal combustion engine. Thereis a valve (11) designed, when the oil pressure exceeds a predetermined value, as a result of dirt deposits in the appliance, for example, to connect the oil inlet of the appliance directly with the oil outlet of the appliance. According to the invention the device partly comprises a pipe (6), the wall of which constitutes a dividing wall between the oil inlet and the oil outlet and in which wall there is at least one opening (11a, 11b). In addition there is a ring (11c) of an elastically resilient material, congruent with the cross-section of the pipe wall and at least partially bearing against this on the oil outlet side of the pipe (6), the shape of the ring corresponding to the cross-sectional shape of the pipe. A valve cone (11d, 11e), functionally connected to the ring or integrally formed therewith, is designed to seal the opening (11a, 11b) when the oil pressure is below the said pressure value, the wall of the opening thereby forming a valve seat, and to reveal the opening when the oil pressure exceeds the said value.

Description

Device in an appliance for the treatment of oil for lubrication of an engine.
The present invention relates to arrangements for oil filters, particularly to pressure relief systems for such filters.
In appliances of this type the oil pressure, as a result of dirt deposits or temperatures which render the oil more viscous, can attain values which risk damaging the appliance and lines to and from the latter, resulting in the leakage of oil. In order to prevent such damage a valve is conventionally fitted which is designed to open when the oil pressure exceeds a predetermined value, thereby allowing the oil to flow directly from an oil inlet to an oil outlet of the filter system so that only a partial flow of oil passes through the appliance.
Summary of the invention
The object of the present invention is to produce such a valve which is simple and functionally reliable. This is achieved by the characteristic features according to the characterising part of claim 1. The subordinate claims indicate advantageous design details of the invention, which will be explained further below with reference to the drawing attached.
Brief Description of the Drawings In this, fig. 1 shows, diagrammatically in an axial section, an oil filter cooler with a valve device according to the invention. Fig. 2 is a detailed view A-A from fig. 1 on an enlarged scale, which shows the valve device in the closed position. Fig. 3 shows the valve device in a cross-section along a line B-B in fig. 2. Fig. 4 is a detailed view A-A similar to that in fig. 2, but with the valve device in the open position. Fig. 5 shows the valve device in the cross-section B-B according to fig. 3 but in the open position. Fig. 6, in a cross-section according to fig. 3, shows an alternative embodiment of a spring forming part of the valve device. Fig. 7, in an axial section as in fig. 1, shows an oil filter cooler with oil flow in the inverse direction compared to the oil filter cooler in fig. 1. Fig. 8 is a detailed view C-C from fig. 7 on an enlarged scale, showing the valve device in the closed position and fig. 9 shows the valve device in a cross-section along a line
D-D in fig. 8. Figures 10-12 in cross-section D-D through the valve device similar to fig. 9, show alternative embodiments of a spring forming part of the valve device. Figures 13 and 14 show an alternative embodiment for use when oil flows into the filter assembly through a central tube and figs. 15 and 16 show an embodiment for use when oil flows out of a central tube.
Description In fig. 1 , 1 generally denotes an oil filter cooler, 2 denotes an engine block adapted to the oil filter cooler 1 or an intermediate piece, which forms an adapter between a conventional engine block and the oil filter cooler. The embodiment of fig. 1 is hereafter described with reference to such an adapted engine block. In this there is a duct 2a for contaminated oil from the engine and a duct 2b for cleaned and cooled oil to the engine and the duct 2c, 2d for coolant to and from the engine filter cooler 1 respectively.
The construction and function of the oil filter cooler 1 will now be briefly described. The oil filter cooler 1 has an outer wall la, an intermediate wall lb and an inner wall lc, a base Id and a cover le. The inner wall lc, the base Id and the cover le form a cylindrical container, which encloses a filter material 3. The latter is preferably composed of paper, folded so as to form a tubular casing.
An outer circulation chamber 4 is situated between the outer wall la and the intermediate wall lb. An inner circulation chamber 5 is defined by the intermediate wall lb, the inner wall lc, the base Id and an outwardly pointing flange lcl, arranged on the inner wall.
The outer circulation chamber 4 is designed to accommodate the through- flow of coolant and therefore connects with the ducts 2c, 2d.
The inner circulation chamber 5, which is intended to accommodate the through- flow of oil, connects on the one hand with the filter material container via an opening lc2 in the inner wall lc and on the other with the duct 2b for cleaned oil.
The cover le is detachably joined by means of a threaded connection to one end of a pipe 6 that extends axially in the oil filter cooler 1 and the other end of which, detachably joined to the engine block 2 by means of a further threaded connection, projects out of the oil filter cooler 1. The inside of the pipe 6 is connected by at least one opening 6a in the pipe wall to the filter material container. When the oil filter cooler 1 is fitted on the engine block 2, the inside of the pipe 6 connects with the duct 2a and the inner circulation chamber with the duct 2b. Since it is not the oil filter cooler 1 itself, but rather a part of this which forms the subject matter of the present invention, details of the oil filter cooler such as the seals and design details will not be further explained; however the flows of oil and coolant will be briefly explained. The principles of operation of the oil filter cooler are described in United States Patent Application No. 09/082,751, filed May 21, 1998, which is hereby incorporated by reference.
As shown by an arrow 7, the coolant flows into the duct 2c, out of the engine block 2 and into the outer circulation chamber 4 where, through the intermediate wall lb, it absorbs heat from the oil in the inner circulation chamber 5, following which the coolant flows via the duct 2d back into the engine block 2 as indicated by an arrow 8.
Contaminated and warm oil, marked by an arrow 9, leaves the engine block 2 via the duct 2a, flows via the inside of the pipe 6 and the opening 6a out into the filter material container. The oil is cleaned as it passes through the filter material 3 and the cleaned oil flows via the opening lc2 into the inner circulation chamber 5, where it is cooled. The oil, thus cooled and cleaned, leaves the inner circulation chamber 5 and flows via the duct 2b into the engine block, as indicated by arrows 10. The oil direction of flow indicated above is advantageous, in the inverse direction of flow there is a certain risk that impurities from the unfiltered oil will become stuck in the inner flow chamber 5, impairing the flow through this. Contaminated filter material can easily be renewed after screwing off the cover le.
The oil filter assembly includes a valve 11 which is designed to open in the event of oil pressure in excess of a predetermined value, thereby producing a connection between inlet of the oil filter cooler and its outlet.
partition between incoming contaminated oil and outgoing filtered and cooled oil. As will be seen from fig. 3, the pipe section has a circular cross-section but may also have some other cross-section.
The pipe section has two opposing bores 1 la, 1 lb, the orifices of which in the filter material container have conical bevels Hal, 1 lbl as will clearly be seen from fig. 4. A spring lie, the shape of which corresponds to the cross-sectional shape of the pipe section, extends over a part of the circumference and has a break in the form of a relatively wide slit. Symmetrically placed in relation to the slit and right in front of the openings 11a, 1 lb are valve cones l id, l ie, connected to the spring, which may also be integrally formed with the spring l ie. The valve cones are of hemispherical shape and fit tightly against the bevels Hal, 1 lbl, which form the valve seats. The oil pressure at which the valve opens is determined by the spring constant of the spring, which in turn naturally depends, among other things, on the thickness of material. The degree of opening of the valve is determined by the oil pressure; within certain limits a fairly linear ratio prevails.
Figures 2, 4 and 3,5 illustrate the closed and open position of the valve respectively. In the closed position the flow, marked by the arrow 9 in fig. 1, passes the valve 11 unimpeded, as marked by an arrow 12 in fig. 2. When the valve 11 opens, which occurs as a result of increased oil pressure for the reasons stated previously, the oil flow marked by the arrow 9 is divided up into three partial flows, as illustrated by arrows 12a, 12b, 12c in fig. 4, the flows marked by the arrows 12a, 12b flowing via bores 11a, 1 lb directly to the outlet duct 2c, whilst the oil flow marked by the arrow 12c continues into the oil filter. The ratio between these flows naturally depends, among other things, on the degree of clogging of the filter.
Fig. 6 illustrates a method of adjusting the opening pressure of the valve by making a part of the spring describe a U-shape llcl: the leg length of the U-shape llcl influences the rigidity of the spring and thereby the opening pressure.
The embodiment of the oil filter cooler in fig. 7 corresponds to the embodiment shown in fig. 1 except in one important respect, the oil flow here is in the inverse direction, that is the contaminated oil first passes through the inner circulation chamber 5, where it is cooled, following which it passes through the oil filter. Thus contaminated oil flows up through the duct 2b, as indicated by arrows 13, whilst cooled and filtered oil flows down through the duct 2a, as indicated by an arrow 14. The valve, which in fig 7 must have the inverse function relative to the valve in fig. 1 , is denoted in fig. 7 by 11' and comprises a spring l l 'c, arranged inside the pipe section, with valve cones l id', He', which fit in bores 11a', lib'. Like the valve 11 in fig. 1, the valve 11' is opened when the oil pressure exceeds a certain value.
As will be seen from figures 9-12, the spring lie' has a plurality of alternative embodiments. In fig. 9 the valve cones l id', He' are integrated into an annular hoop, which is pre-tensioned so that at an oil pressure less than the opening pressure of the valve there is a degree of play in relation to the wall of the pipe 6 that allows the valve cones to lift or seat when the valve opens. Also, in the embodiments according to figures 10 and 11, there is a corresponding degree of play as in the embodiment according to fig. 9. The spring in fig. 10 comprises two essentially identical halves 1 lc' 1 and 1 lc'2, which telescopically nest one inside the other, whilst the springs in fig. 11 have an overlapping section 1 lc'3. In the embodiment according to fig. 12 the springs l ie' have a pair of legs 1 lc'4, which help to facilitate fitting and dismantling of the springs.
Fig 13 shows an additional embodiment of the present invention in which oil is admitted to the filter medium 3 via a central pipe 6', as shown by arrow 20. Pipe 6'comprises internal threads 21 for engagement with an oil outlet pipe (not shown) as is common on internal combustion engines. Oil exits the filter as shown by arrows 23 and is received by the engine through a mating surface (not shown). The filter assembly of fig. 13 also includes a cooling fluid inlet 30 and an outlet 32 for coolant to cool the oil in the oil filter. The cooling properties of this apparatus are discussed in the aforementioned United States Patent Application No. 09/082,751. The filter assembly also includes a pipe 25 having an inner opening which has a diameter larger than the exterior diameter of inlet pipe 6'. The difference between the inner diameter of pipe 25 and the outer diameter of pipe 6' defines an annular channel 27 which is in fluid and pressure communication between the outlet oil (23) and a pair of bores 1 If and 11.
Fig 14 shows in greater detail the bores l ie and lid which provide a possible oil passage between the oil entering pipe 6' and the oil outlet. As with the preceding embodiment of fig 1, the bores 1 If and 11 g are selectively sealed by valve cones of a spring 1 lh.
When the inlet oil pressure in pipe 6' exceeds the outlet oil pressure by less than a predetermined amount, the valve cones seal the bores as a result of action by the spring 1 lh. When the inlet pressure is greater that the outlet pressure by more than the predetermined amount, the valve cones are forced open and oil flows through bores 11 f and 1 lg along channel 27 to the outlet.
Figs. 15 and 16 show an embodiment in which the oil filter assembly of fig. 13 is equipped for reversed direction oil flow. In figs. 15 and 16 oil flows out through the central pipe 35 and into the filter 37 around its perimeter. This embodiment includes a valve assembly which includes a resilient member 1 lc' sealing a pair of bores. This valve assembly functions in accordance with the embodiment of fig. 7 to relieve oil pressure when the pressure of the inlet side exceeds the pressure of the outlet side by more than a predetermined amount.

Claims

What Is Claimed Is
1. In an appliance for the treatment of oil for lubrication of an engine, an apparatus comprising a pipe having a wall which comprises a dividing wall between an oil inlet and an oil outlet side of the appliance and in which wall there is at least one opening, a ring of an elastically resilient material at least partly congruent with the cross-section of the pipe wall and at least partially bearing against the wall on the oil outlet side of the pipe, the shape of the ring corresponding to the cross-sectional shape of the pipe, and the ring including at least one valve cone functionally connected to the ring or integrally formed therewith, the valve cone being designed to seal the opening when the oil pressure difference between the inlet and outlet sides is below a predetermined pressure value, the wall of the opening thereby forming a valve seat, and to reveal the opening when the oil pressure difference between the inlet and outlet sides exceeds said predetermined value.
2. An apparatus according to claim 1 , wherein the cross-section of the pipe wall is circular.
3. An apparatus according to claim 1 wherein the opening on the oil outlet side has a bevelled edge and the valve cone is of hemispherical shape in order to fit in the opening against the bevel.
4. An apparatus according to claim 3, wherein a section of the ring, which section is situated symmetrically in relation to the valve cones is U-shaped.
5. An apparatus according to claim 3 in which the pipe wall includes an additional opening between the inlet and outlet sides and the ring comprises an additional valve cone for sealing the additional opening when the oil pressure difference between the inlet and outlet sides is below the predetermined value and for revealing the additional opening when the oil pressure difference between the inlet and outlet sides exceeds said predetermined value.
6. An apparatus according to claim 1 wherein the opening is situated in the wall at a location to permit substantially direct flow of oil from inlet to the outlet sides when the oil pressure difference between the inlet and outlet sides exceeds said predetermined value.
7. An apparatus according to claim 1 wherein the opening is situated in the wall at a location in fluid and pressure communication with the outlet side via a channel which permits the flow of oil from the inlet side to the outlet side when the oil pressure difference between the inlet and outlet sides exceeds said predetermined value.
8. An apparatus according to claim 7 in which the pipe has a circular cross section with an outer diameter and the channel is formed by an additional conduit having an interior diameter greater than the exterior diameter of the pipe and disposed about the pipe.
9. An apparatus according to claim 7 wherein the channel is disposed on the outlet side of the wall so that oil flows from the opening to the outlet via the channel.
10. An apparatus according to claim 7 wherein the channel is disposed on the inlet side of the wall so that oil flows from the inlet side to the opening via the channel.
PCT/SE1999/000881 1998-05-21 1999-05-21 Device in an appliance for the treatment of oil for lubrication of an engine WO1999059696A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU45412/99A AU4541299A (en) 1998-05-21 1999-05-21 Device in an appliance for the treatment of oil for lubrication of an engine

Applications Claiming Priority (4)

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US8275198A 1998-05-21 1998-05-21
US09/082,751 1998-05-21
US13080298A 1998-08-07 1998-08-07
US09/130,802 1998-08-07

Publications (1)

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WO1999059696A1 true WO1999059696A1 (en) 1999-11-25

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PCT/SE1999/000881 WO1999059696A1 (en) 1998-05-21 1999-05-21 Device in an appliance for the treatment of oil for lubrication of an engine

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WO (1) WO1999059696A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004037384A2 (en) * 2002-10-24 2004-05-06 Ntz Nederland Bv Bidirectional working filter
EP1211391B1 (en) * 2000-12-01 2007-04-04 Honda Giken Kogyo Kabushiki Kaisha Housing to be affixed to an engine
DE102015114320A1 (en) * 2015-08-28 2017-03-02 Hengst Se & Co. Kg Fluid filter with a housing and a fluid drain forming central standpipe
CN109826688A (en) * 2019-01-30 2019-05-31 潍柴重机股份有限公司 Spin-on filter
CN110953038A (en) * 2019-12-20 2020-04-03 安徽明源汽配有限公司 Prevent blockking up machine oil filter
DE102021109876A1 (en) 2021-04-20 2022-10-20 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Filter cooling combination unit of an oil system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1299283B (en) * 1966-09-24 1969-07-17 Vertrieb Techn Erzeugnisse E S Pressure relief valve for a disposable filter
GB2164395A (en) * 1984-09-04 1986-03-19 Chausson Usines Sa Pressure regulating and by- passing device for heat engine lubricating circuits
EP0473261A2 (en) * 1990-06-27 1992-03-04 Mitsubishi Oil Co., Ltd Pressure regulating valve
WO1997044113A1 (en) * 1996-05-23 1997-11-27 Filtertek Inc. Safety relief valve useful in an oil filter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1299283B (en) * 1966-09-24 1969-07-17 Vertrieb Techn Erzeugnisse E S Pressure relief valve for a disposable filter
GB2164395A (en) * 1984-09-04 1986-03-19 Chausson Usines Sa Pressure regulating and by- passing device for heat engine lubricating circuits
EP0473261A2 (en) * 1990-06-27 1992-03-04 Mitsubishi Oil Co., Ltd Pressure regulating valve
WO1997044113A1 (en) * 1996-05-23 1997-11-27 Filtertek Inc. Safety relief valve useful in an oil filter

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1211391B1 (en) * 2000-12-01 2007-04-04 Honda Giken Kogyo Kabushiki Kaisha Housing to be affixed to an engine
WO2004037384A2 (en) * 2002-10-24 2004-05-06 Ntz Nederland Bv Bidirectional working filter
WO2004037384A3 (en) * 2003-01-09 2004-07-22 Ntz Nederland Bv Bidirectional working filter
DE102015114320A1 (en) * 2015-08-28 2017-03-02 Hengst Se & Co. Kg Fluid filter with a housing and a fluid drain forming central standpipe
CN109826688A (en) * 2019-01-30 2019-05-31 潍柴重机股份有限公司 Spin-on filter
CN110953038A (en) * 2019-12-20 2020-04-03 安徽明源汽配有限公司 Prevent blockking up machine oil filter
CN110953038B (en) * 2019-12-20 2021-09-03 安徽明源汽配有限公司 Prevent blockking up machine oil filter
DE102021109876A1 (en) 2021-04-20 2022-10-20 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Filter cooling combination unit of an oil system

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