EP1698764B1 - Oil suction duct for internal combustion engines - Google Patents

Oil suction duct for internal combustion engines Download PDF

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Publication number
EP1698764B1
EP1698764B1 EP05112227A EP05112227A EP1698764B1 EP 1698764 B1 EP1698764 B1 EP 1698764B1 EP 05112227 A EP05112227 A EP 05112227A EP 05112227 A EP05112227 A EP 05112227A EP 1698764 B1 EP1698764 B1 EP 1698764B1
Authority
EP
European Patent Office
Prior art keywords
suction
sump
suction duct
internal combustion
pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP05112227A
Other languages
German (de)
French (fr)
Other versions
EP1698764A3 (en
EP1698764A2 (en
Inventor
Giorgio Marcenaro
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FPT Industrial SpA
Original Assignee
FPT Industrial SpA
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 FPT Industrial SpA filed Critical FPT Industrial SpA
Publication of EP1698764A2 publication Critical patent/EP1698764A2/en
Publication of EP1698764A3 publication Critical patent/EP1698764A3/en
Application granted granted Critical
Publication of EP1698764B1 publication Critical patent/EP1698764B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F01M2011/007—Oil pickup tube to oil pump, e.g. strainer

Definitions

  • This invention relates to an oil suction duct for internal combustion engines and, more precisely, relates to an oil suction duct of the type designed to be installed atbottom of the oil sump of an internal combustion engine.
  • a lubricating oil pan or "sump" which is usually arranged at the bottom of the engine block, to collect and contain all of the lubricating oil, it is already known in the art.
  • Such engines also comprise a pump driven by the engine itself that sucks the lubricating oil from the sump and delivers the same into a multiplicity of lubrication ducts where the oil is subsequently collected again into said sump.
  • the lubricating oil is sucked from the sump by means of a duct, i.e. the so called suction duct, that sucks in the oil from the lowest part of the sump and delivers said oil towards the pump.
  • Said suction duct usually has a suction inlet that is arranged in proximity to the bottom of the sump to where the oil flow is directed.
  • suction duct An example of known suction duct is disclosed in the patent application US 2002/0096221 A1 .
  • the suction duct is a rigid structure made of low-carbon metal, and is assembled and fixed to the bottom of the engine block by means of flanges before the oil sump is assembled. Although this is a low-cost solution, it still has some drawbacks.
  • a first drawback consists in that the suction pipe is made of metal and is therefore a rigid structure, which means it cannot be adapted to fit different types and shapes of oil sumps that may be used as the engine is updated and/or modified. This means that during the production of one of more engine lines, the type and/or shape of the suction duct must be changed each time the shape of the oil sump is changed, while maintaining the same shape or casting of the base of the engine block, dealing to an increase of production costs.
  • suction duct is subject to strong vibrations, and being made of metal the same is also subject to mechanical fatigue, therefore the duct can easily break.
  • the object of the present invention is to solve the above described drawbacks by providing a suction duct for internal combustion engines that can readily be adapted for installation on different oil sump versions.
  • Another object of the present invention is to provide a suction duct for internal combustion engines that is not subject to fatigue stress caused by the vibrations of the engine, thus being more reliable.
  • a further object of the present invention is to provide a suction duct for internal combustion engines that is easier to assemble compared to the suction duct known in the prior art.
  • the present invention thus provides to a suction duct for internal combustion engines according to claim 1.
  • an engine 1 comprises an engine block 2 to the bottom of which a lubricating oil sump 3 is integrally connected. Inside the sump 3 there is a suction duct 4 that is connected to the bottom of the engine block 2 of the engine 1 by means of flanges and bolts (illustrated in greater detail below).
  • FIG 2 shows the sump 3 and suction duct 4 of the engine of Figure 1 in greater detail.
  • the suction duct 4 comprises a first rigid duct 5 that is connected to the pump at the bottom of the engine block 2 by means of a flange and the relevant bolts (not illustrated).
  • the first duct 5 is connected to a second rigid duct 6 by means of flanges 7.
  • the second duct 6 has a supporting bracket 8 that is also fixed to the bottom of the engine block 2.
  • the purpose of the bracket 8 is to increase the fatigue strength of the duct 6.
  • the suction inlet typically incorporates a straining and filtering element to remove any solid bodies and impurities (not illustrated in the drawing).
  • FIG 3 a partial and schematic illustration of the suction duct according to the present invention it is shown. For the sake of clarity same parts will have same numbers.
  • the suction duct consists of a single tubular member or a pipe 4 that is flexible, and it is made of a suitable material which can be already known in the art.
  • the pipe 4 has a fitting 21 for the removable coupling and complementary to the suction inlet of the oil pump, the fitting 21 being a bayonet, or screw joint type.
  • the suction inlet 9 comprises a substantially cylindrical body with a suction area having a multiplicity of openings 10 in proximity to the bottom region of the sump 3.
  • multiplicity of openings 10 constitute themselves an area in which any solid bodies and impurities that may have been deposited on the bottom of the sump 3 are strained or filtered to the pump.
  • the pipe 4 is connected to the inlet 9 by means of the coupling 22.
  • the pipe 4 is connected to the suction inlet of the pump on the engine block 2 by means of the coupling 21, and at last the sump 3 is connected to the engine block 2.
  • a first advantage consists of the fact that the suction pipe comprises a single pipe 4 and there is thus no risk of leaks or intermediate breakages that could result in loss of efficiency.
  • a second advantage consists of the fact that the suction pipe 4 is made of a flexible material and is thus not subject to fatigue stress that could undermine its integrity and shorten its working life.
  • connection of the pipe 4 to the engine block 2 requires the use of fewer threaded connections, making connection simpler and reducing machining and assembly times.
  • a further advantage consists of the fact that the assembly of the suction pipe 4 and subsequent assembly of the oil sump 3 on the engine block 2 are simplified, reducing the costs and time involved.
  • Another advantage consists of the fact that, since the suction pipe 4 is more reliable, relevant repairs and engine maintenance operations can be carried out at longer intervals once the suction pipe is in use.
  • Another main advantage concerns the logistics associated with the proposed solution, whereby there are fewer parts for subsequent assembly, as the sump according to this invention is supplied with the suction pipe already assembled, and less space is required at the assembly plant, since the area at the side of the line usually taken up by the suction ducts container(s) is no longer necessary.

Landscapes

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

Description

  • This invention relates to an oil suction duct for internal combustion engines and, more precisely, relates to an oil suction duct of the type designed to be installed atbottom of the oil sump of an internal combustion engine.
  • In internal combustion engines, the presence of a lubricating oil pan or "sump" which is usually arranged at the bottom of the engine block, to collect and contain all of the lubricating oil, it is already known in the art. Such engines also comprise a pump driven by the engine itself that sucks the lubricating oil from the sump and delivers the same into a multiplicity of lubrication ducts where the oil is subsequently collected again into said sump.
  • The lubricating oil is sucked from the sump by means of a duct, i.e. the so called suction duct, that sucks in the oil from the lowest part of the sump and delivers said oil towards the pump. Said suction duct usually has a suction inlet that is arranged in proximity to the bottom of the sump to where the oil flow is directed.
  • An example of known suction duct is disclosed in the patent application US 2002/0096221 A1 . In order to simplify construction and reduce costs, the suction duct is a rigid structure made of low-carbon metal, and is assembled and fixed to the bottom of the engine block by means of flanges before the oil sump is assembled. Although this is a low-cost solution, it still has some drawbacks.
  • A first drawback consists in that the suction pipe is made of metal and is therefore a rigid structure, which means it cannot be adapted to fit different types and shapes of oil sumps that may be used as the engine is updated and/or modified. This means that during the production of one of more engine lines, the type and/or shape of the suction duct must be changed each time the shape of the oil sump is changed, while maintaining the same shape or casting of the base of the engine block, dealing to an increase of production costs.
  • Another drawback consists in that the suction duct is subject to strong vibrations, and being made of metal the same is also subject to mechanical fatigue, therefore the duct can easily break.
  • In order to overcome the aforesaid drawback, there is provided the applying of reinforcing structural members to the suction duct so that it can be anchored at several points to the bottom of the engine block, increasing its strength. However, this solution has the drawback of requiring more work to tighten the bolts or similar devices when mounting and assembling the engine.
  • Furthermore, the use of additional reinforcements on the suction pipe results in increasing production time and costs.
  • Therefore, the object of the present invention is to solve the above described drawbacks by providing a suction duct for internal combustion engines that can readily be adapted for installation on different oil sump versions.
  • Another object of the present invention is to provide a suction duct for internal combustion engines that is not subject to fatigue stress caused by the vibrations of the engine, thus being more reliable.
  • A further object of the present invention is to provide a suction duct for internal combustion engines that is easier to assemble compared to the suction duct known in the prior art.
  • The present invention thus provides to a suction duct for internal combustion engines according to claim 1.
  • A detailed description of a preferred embodiment of the suction duct according to the invention will be now provided, given as a non limiting example, with reference to the annexed drawings, wherein:
    • figure 1 is a schematic view of a longitudinal section of an engine block incorporating a suction duct according to the state of the art;
    • figure 2 is a schematic and partial view of an oil sump incorporating a suction duct according to the state of the art, and
    • figure 3 is a schematic and partial view of an oil sump incorporating the suction duct according to this invention.
  • With reference now to Figure 1 there is shown an internal combustion engine block that incorporates a suction duct of the type already known in the art. Accordingly, an engine 1 comprises an engine block 2 to the bottom of which a lubricating oil sump 3 is integrally connected. Inside the sump 3 there is a suction duct 4 that is connected to the bottom of the engine block 2 of the engine 1 by means of flanges and bolts (illustrated in greater detail below).
  • Figure 2 shows the sump 3 and suction duct 4 of the engine of Figure 1 in greater detail. More precisely, the suction duct 4 comprises a first rigid duct 5 that is connected to the pump at the bottom of the engine block 2 by means of a flange and the relevant bolts (not illustrated). The first duct 5 is connected to a second rigid duct 6 by means of flanges 7.
  • When necessary, the second duct 6 has a supporting bracket 8 that is also fixed to the bottom of the engine block 2. The purpose of the bracket 8 is to increase the fatigue strength of the duct 6.
  • At the end of the duct 6 there is a lubricating oil suction inlet 9. The suction inlet typically incorporates a straining and filtering element to remove any solid bodies and impurities (not illustrated in the drawing).
  • With reference now to figure 3, a partial and schematic illustration of the suction duct according to the present invention it is shown. For the sake of clarity same parts will have same numbers.
  • According to the invention, the suction duct consists of a single tubular member or a pipe 4 that is flexible, and it is made of a suitable material which can be already known in the art. At the end of the pipe 4 on the side which is connected to the oil pump of the engine block 2, the pipe 4 has a fitting 21 for the removable coupling and complementary to the suction inlet of the oil pump, the fitting 21 being a bayonet, or screw joint type.
  • On the other hand, at the suction end of the pipe 4 which corresponds to the bottom of the sump 3 there is a suction inlet 9 that is rendered integral connected to the bottom of the sump 3 by means of a welding. The suction inlet 9 comprises a substantially cylindrical body with a suction area having a multiplicity of openings 10 in proximity to the bottom region of the sump 3.
  • On top of said cylindrical body of the inlet 9 there is a fitting element 22 for the removable coupling of the pipe 4, the coupling 22 being complementary and of the bayonet or screw type.
  • Attention must be drawn to the fact that the multiplicity of openings 10 constitute themselves an area in which any solid bodies and impurities that may have been deposited on the bottom of the sump 3 are strained or filtered to the pump.
  • To assemble the suction duct, first the pipe 4 is connected to the inlet 9 by means of the coupling 22. Second, the pipe 4 is connected to the suction inlet of the pump on the engine block 2 by means of the coupling 21, and at last the sump 3 is connected to the engine block 2.
  • The advantages of the suction pipe 4 according to this invention will be apparent to the person skilled in the art.
  • A first advantage consists of the fact that the suction pipe comprises a single pipe 4 and there is thus no risk of leaks or intermediate breakages that could result in loss of efficiency.
  • A second advantage consists of the fact that the suction pipe 4 is made of a flexible material and is thus not subject to fatigue stress that could undermine its integrity and shorten its working life.
  • Another advantage consists of the fact that the connection of the pipe 4 to the engine block 2 requires the use of fewer threaded connections, making connection simpler and reducing machining and assembly times.
  • A further advantage consists of the fact that the assembly of the suction pipe 4 and subsequent assembly of the oil sump 3 on the engine block 2 are simplified, reducing the costs and time involved.
  • Another advantage consists of the fact that, since the suction pipe 4 is more reliable, relevant repairs and engine maintenance operations can be carried out at longer intervals once the suction pipe is in use.
  • Another main advantage concerns the logistics associated with the proposed solution, whereby there are fewer parts for subsequent assembly, as the sump according to this invention is supplied with the suction pipe already assembled, and less space is required at the assembly plant, since the area at the side of the line usually taken up by the suction ducts container(s) is no longer necessary.

Claims (1)

  1. An internal combustion engine (1) comprising an engine block (2), an oil sump (3), and a suction, duct comprising:
    - a flexible pipe (4);
    - first connecting means (21) to the engine block (2) mounted at one end of said pipe (4);
    - second connecting means (22) mounted at the opposite end of said pipe (4); and
    - a suction inlet (9) between the sump (3) and said second connecting means (22),
    wherein:
    - said first connecting means comprises a coupling (21) of the threaded or bayonet type;
    - said second connecting means comprises a coupling (22) of the threaded or bayonet type;
    - said suction inclet (9) compring a cylindrical body (9) having a suction area having a multiplicity of openings (10) in proximity to the bottom of the sump (3), the top of said cylindrical body (9) comprising a complementary fitting element for the coupling with said second connecting means, said suction inlet (9) being integrally connected to the bottom of said sump (3) by welding.
EP05112227A 2005-03-02 2005-12-15 Oil suction duct for internal combustion engines Expired - Lifetime EP1698764B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI20050316 ITMI20050316A1 (en) 2005-03-02 2005-03-02 OIL JUICE FOR ENDOTHERMIC MOTORS

Publications (3)

Publication Number Publication Date
EP1698764A2 EP1698764A2 (en) 2006-09-06
EP1698764A3 EP1698764A3 (en) 2009-04-15
EP1698764B1 true EP1698764B1 (en) 2013-03-06

Family

ID=34956721

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05112227A Expired - Lifetime EP1698764B1 (en) 2005-03-02 2005-12-15 Oil suction duct for internal combustion engines

Country Status (3)

Country Link
EP (1) EP1698764B1 (en)
ES (1) ES2410586T3 (en)
IT (1) ITMI20050316A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITUB20151211A1 (en) * 2015-08-25 2015-11-25 Mdb Srl SELF-DIRECTIONAL OIL FISHING SYSTEM CONTAINED IN THE OIL CUP AND CONNECTED TO THE INTERNAL COMBUSTION ENGINE LUBRICATION CIRCUIT

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19925354C1 (en) * 1999-06-02 2000-08-03 Daimler Chrysler Ag Oil sump for an internal combustion motor is fitted to the crankcase in an oil sealed mounting with elastic bellows and is supported by an auxiliary carrier

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3022443C2 (en) * 1980-06-14 1983-04-14 Bayerische Motoren Werke AG, 8000 München Suction pipe for the lubricating oil circuit of an internal combustion engine
JP2002054418A (en) * 2000-08-11 2002-02-20 Piolax Inc Oil strainer, and method of manufacturing same
JP2002106316A (en) * 2000-09-29 2002-04-10 Piolax Inc Oil strainer
US6523561B2 (en) * 2001-01-24 2003-02-25 Federal-Mogul World Wide, Inc. Snap-together filter system for transmission oil pan and method of manufacture

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19925354C1 (en) * 1999-06-02 2000-08-03 Daimler Chrysler Ag Oil sump for an internal combustion motor is fitted to the crankcase in an oil sealed mounting with elastic bellows and is supported by an auxiliary carrier

Also Published As

Publication number Publication date
ITMI20050316A1 (en) 2006-09-03
EP1698764A3 (en) 2009-04-15
ES2410586T3 (en) 2013-07-02
EP1698764A2 (en) 2006-09-06

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