EP1990508A1 - Ölzufuhrsystem - Google Patents

Ölzufuhrsystem Download PDF

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Publication number
EP1990508A1
EP1990508A1 EP07107616A EP07107616A EP1990508A1 EP 1990508 A1 EP1990508 A1 EP 1990508A1 EP 07107616 A EP07107616 A EP 07107616A EP 07107616 A EP07107616 A EP 07107616A EP 1990508 A1 EP1990508 A1 EP 1990508A1
Authority
EP
European Patent Office
Prior art keywords
oil
vehicle
feeding system
control means
flow control
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.)
Granted
Application number
EP07107616A
Other languages
English (en)
French (fr)
Other versions
EP1990508B1 (de
Inventor
Mats Morén
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.)
Volvo Car Corp
Original Assignee
Ford Global Technologies LLC
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 Ford Global Technologies LLC filed Critical Ford Global Technologies LLC
Priority to EP07107616.0A priority Critical patent/EP1990508B1/de
Publication of EP1990508A1 publication Critical patent/EP1990508A1/de
Application granted granted Critical
Publication of EP1990508B1 publication Critical patent/EP1990508B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F01M11/06—Means for keeping lubricant level constant or for accommodating movement or position of machines or engines
    • F01M11/062—Accommodating movement or position of machines or engines, e.g. dry sumps
    • F01M11/064—Movement
    • 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
    • F01M2011/0075—Oil pickup tube to oil pump, e.g. strainer with a plurality of tubes

Definitions

  • the present invention concerns an oil feeding system suitable for an oil pump in a vehicle.
  • the present invention also concerns an oil pump assembly, a vehicle, a computer program product, an electronic control unit (ECU) and a method for feeding oil from an oil pan to an oil pump that is mounted in a vehicle.
  • ECU electronice control unit
  • An oil pump in a vehicle is designed to supply pressurized oil to lubricate and cool parts of the vehicle's engine or transmission.
  • Oil is, for example, supplied to a vehicle's pistons, so that they can slide easily in their cylinders, and to bearings that allow components like a vehicle's crankshaft and camshafts to rotate freely.
  • oil is sucked out of an oil pan, or oil sump, by an oil pump and then squirted under high pressure onto components such as cylinder walls and bearings. The oil then drains back down into the oil pan where it is collected again and the cycle repeats.
  • Conventional oil feeding systems for supplying oil to parts of a vehicle's engine or transmission comprise a feed pipe that extends from the oil pan to an oil pump.
  • the oil inlet of the feed pipe is usually placed at the centre of the oil pan.
  • Problems may occur when the oil level inside the oil pan temporarily falls below the oil inlet of the feed pipe due to the vehicle accelerating or decelerating (in which cases oil in the oil pan is displaced to the rear or to the front of the oil pan respectively), or due to the vehicle turning to the left or right (in which cases the oil in the oil pan is displaced to one side of the oil pan) or due to the vehicle tilting backwards, forwards or to the side when travelling along a sloping or uneven surface.
  • a vehicle is accelerating, decelerating, turning or tilting air may therefore be sucked up through the feed pipe instead of oil and a sufficient quantity of oil will consequently not be fed from the oil pan to the desired parts of the vehicle's engine or transmission.
  • This problem may be avoided by ensuring that the oil level in the oil pan is high enough so that air will not be sucked into an oil pump even when a vehicle is accelerating or decelerating, turning or tilting.
  • a disadvantage with this solution is that a larger quantity of oil is needed to fill the oil pan, which increases service costs and means that the oil pan has to be made large and deep enough to hold the larger quantity of oil, which limits a vehicle manufacturer's design options, increases manufacturing costs and decreases the fuel efficiency of the vehicle (due to the increased weight of the oil pan and oil). Additionally, a lot of oil may splatter and hit the vehicle's crankshaft, raising the temperature of the oil and decreasing the performance of the vehicle at high engine speeds.
  • an oil pan is often placed under an engine, if the oil pan is dimensioned to be deep and narrow, rather than shallow and wide, this may result in the vehicle having a lower ground clearance and/or it may mean that the engine has to be placed higher up in the vehicle.
  • a more highly placed engine raises the vehicle's centre of gravity and consequently decreases its stability, and it may also adversely affect the vehicle's aerodynamics (since a higher hood-line may be necessary), which results in reduced fuel efficiency and increased wind noise and buffeting.
  • JP 58093911 discloses an oil feeding device, for feeding oil from an oil pan to an oil pump, which comprises two suction ports located at the front and the rear of the oil pan.
  • the end of each suction port is provided with a ball valve that comprises a dead weight that moves along a trough-shaped guide and that is opened and closed in accordance with the inclination of the oil level at each suction port end.
  • a disadvantage with such an oil feeding device is that if the valve at the end of the suction port that should be feeding oil to the oil pump when the vehicle is tilted gets blocked, which is quite probable since impurities in the oil collect at the bottom the oil pan, oil may be completely prevented from flowing to the oil pump.
  • An object of the present invention is to provide an oil feeding system that effectively supplies oil to an oil pump that is mounted in a vehicle during all operating conditions of the vehicle, i.e. irrespective of whether the vehicle is accelerating, decelerating, turning or tilting.
  • an oil feeding system for an oil pump in a vehicle, which system comprises a pair of feed pipes with each feed pipe having an oil inlet.
  • the feed pipes are arranged to draw oil from an oil pan and feed it to an oil pump when the oil feeding system is mounted in a vehicle and in use.
  • One feed pipe of said pair of feed pipe is arranged to draw oil from one part of the oil pan and the other feed pipe is arranged to draw oil from another part of the oil pan.
  • the oil feeding system comprises a flow control means that is arranged downstream of the oil inlets. The flow control means is arranged to remain in a first position that allows oil to flow through either or both of the two feed pipes of when the vehicle is not accelerating, decelerating, turning or tilting.
  • the flow control means is arranged to be displaced, as a direct or indirect consequence of the acceleration, deceleration, turning, or tilting of the vehicle, to a second position in which it allows oil to flow only through the feed pipe whose oil inlet is located in the part of the oil pan to which oil will be displaced during the acceleration, deceleration, turning or tilting of the vehicle and in which position it simultaneously blocks the flow of oil through the other feed pipe.
  • Such an oil feeding system requires less oil in the oil pan to ensure that the feed pipes will supply oil (and not air) to the oil pump in a vehicle during all operating conditions of the vehicle.
  • oil feeding system of the present invention is intended for use particularly, but not exclusively in a wet sump in which an oil pump sucks oil from an oil pan and then pumps it to parts of a vehicle's engine.
  • the oil feeding system may equally be used in a dry sump.
  • extra oil is stored in a tank outside the engine rather than in an oil pan under the engine.
  • the minimum amount of oil possible remains in the engine.
  • oil pan in the appended claims is therefore intended to mean any oil container, which may be located anywhere in a vehicle and from which oil is drawn and fed to an oil pump.
  • the flow control means comprises a sliding valve, such as a piston, that is arranged to be displaced as a direct or indirect consequence of forces acting on the vehicle during the acceleration/deceleration/turning/tilting of the vehicle.
  • a sliding valve such as a piston
  • the expression “piston” is intended to mean a sliding member of any shape, not necessarily a cylindrical member.
  • the flow control means comprises a sliding valve, such as a piston, that is arranged to be displaced as a consequence of suction depressure that arises due to the displacement of oil in the oil pan during acceleration/deceleration/turning/tilting of the vehicle.
  • the oil inlets are arranged to be located on opposite parts or sides of the oil pan.
  • the oil from one or both of the two feed pipes is ultimately arranged to be fed to the oil pump via a single pipe.
  • the flow control means is for example arranged substantially at the point where the two feed pipes merge into the single pipe, i.e. within 20 cm of that point, preferably within 10 cm of that point.
  • the oil feeding system comprises a plurality of pairs of feed pipes.
  • the oil feeding system may comprise a flow control means arranged to control the flow of oil through only one pair of feed pipes or a flow control means that is arranged to control the flow of oil through a plurality of pairs of feed pipes.
  • the flow control means is arranged to remain in the first position when the vehicle in which the oil feeding device is mounted is not accelerating/decelerating/turning/tilting substantially and is arranged to be displaced during substantial acceleration/deceleration/turning/tilting of the vehicle.
  • substantially acceleration/deceleration/turning/tilting of the vehicle is intended to mean an acceleration/deceleration/turning/tilting that will cause oil in the oil pan to be displaced to such an extent that one oil inlet will become located above the level of the oil.
  • a vehicle manufacturer knowing the size and shape of an oil pan and the level to which the oil pan will be filled during the operation of the vehicle, will of course be able to determine the magnitude of "substantial acceleration/deceleration/turning/tilting" and, on the basis of the present disclosure, construct the flow control means accordingly.
  • the present invention also concerns an oil pump assembly comprising an oil pump and an oil pan and an oil feeding system according to any of the embodiments of the invention for feeding oil from said oil pan to said oil pump.
  • the present invention further concerns a method of feeding oil from an oil pan to an oil pump that is mounted in a vehicle using an oil feeding system according to any of the embodiments of the invention.
  • the method comprises the steps of determining whether the vehicle is accelerating/decelerating/turning/tilting at a rate/angle that exceeds a predetermined rate/angle and displacing the flow control means of the oil feeding system accordingly to ensure that oil, and not air, will be supplied to the oil pump.
  • the present invention also concerns a computer program product containing computer program code means arranged to cause a computer or a processor to carry out at least one of the steps of the method according to an embodiment of the invention, stored on a computer-readable medium or a carrier wave.
  • the present invention further concerns an ECU that comprises a computer program product according to an embodiment of the invention.
  • the present invention also concerns a vehicle, such as a car, boat, train or airplane, that comprises at least one oil feeding system, at least one oil pump assembly, a computer program product or an ECU according to any of the embodiments of the invention.
  • a vehicle such as a car, boat, train or airplane, that comprises at least one oil feeding system, at least one oil pump assembly, a computer program product or an ECU according to any of the embodiments of the invention.
  • the present invention further concerns a vehicle comprising an E-W-mounted engine whereby one of the oil inlets is located at the E-side of the oil pan and the other oil inlet is located at the W-side of the oil pan or whereby one of said oil inlets is located at the N-side of said oil pan and the other oil inlet is located at the S-side of said oil pan.
  • the vehicle comprises an N-S-mounted engine whereby one of the oil inlets is located at the N-side of the oil pan and the other of the two oil inlets is located at the E-side of the oil pan or whereby one of said oil inlets is located at the N-side of said oil pan and the other oil inlet is located at the W-side of said oil pan.
  • FIG 1 shows an oil feeding system 10 for an oil pump mounted in a vehicle that is travelling along a substantially flat surface.
  • the oil pump may be a gear pump driven by the vehicle's camshaft or crankshaft.
  • the oil feeding system 10 comprises two feed pipes 12 and 14 that each have an oil inlet 12a and 14a.
  • the feed pipes 12 and 14 are arranged to draw oil 16 from the bottom of an oil pan 18 and feed it to an oil pump 20 when the oil feeding system 10 is mounted in a vehicle and in use.
  • the oil pan 18 may be a detachable mechanism made out of steel and bolted to the bottom of the vehicle's crankcase. It may be molded into a deeper section and mounted at the bottom of a vehicle's crankcase to serve as an oil reservoir to maximize its function.
  • One oil inlet 14a is arranged to be located on the N-side of the oil pan 18 and the other oil inlet 12a is arranged to be located on the S-side of the oil pan.
  • the oil feeding system 10 comprises a flow control means 22, for example two pistons 22a and 22c interconnected by a cross bar 22b which are arranged to be displaced inside a piston chamber 22d as a direct or indirect consequence of forces acting on the vehicle during the acceleration/deceleration or during the tilting of the vehicle when it is travelling along an inclined/declined/uneven surface.
  • the flow control means 22 is arranged downstream of the oil inlets 12a and 14a at a point where the two feed pipes 12 and 14 merge into a single pipe 24.
  • Figure 1 shows the flow control means 22 in a first position that allows oil 16 to flow through both of the feed pipes 12 and 14 when the vehicle is not accelerating/decelerating/tilting and when the oil level in the oil pan 18 is consequently substantially parallel to the bottom of the oil pan 18 when the vehicle is travelling along a substantially flat surface.
  • the body of each piston 22a and 22c In the first position, the body of each piston 22a and 22c is partly located in the piston chamber 22 and only partly obstructs the oil flowing through the feed pipes 12 and 14.
  • the body of each piston could be arrange so as not to obstruct the oil flowing the feed pipes 12 and 14 at all when the flow control means are in the first position.
  • the flow control means 22 may be arranged to allow oil 16 to flow through just one of the feed pipes 12 and 14 when the vehicle is not accelerating/decelerating/tilting and when the flow control means 22 are in the first position.
  • the oil pan 18 has a volume of 3-7 litres, the pistons 22a and 22c have a diameter of 2-7 cm, and the pistons 22a and 22c and the connecting rod 22b have a total weight of 200-500 g.
  • the dimensions of the components of the oil feeding system will however vary depending on its application.
  • Figure 2 shows the oil feeding system 10 of figure 1 with the flow control means 22 in a second position after the flow control means 22 has been displaced in the direction of arrow 26 in figure 2 as a direct consequence of acceleration of the vehicle. Since the oil 16 in the oil pan 18 is subjected to the same forces as the flow control means 22, the flow control means 22 may be arranged to move simultaneously with the oil 16. The flow control means 22 has for example been automatically displaced by forces acting on the vehicle during its acceleration. In this second position the flow control means 22 allows oil 16 to flow only through the feed pipe 12 that has an oil inlet 12a located on the S-side of the oil pan 18 to which most oil 16 will be displaced during the acceleration of the vehicle.
  • Figures 3 and 4 show an oil feeding system according to a second embodiment of the invention in which the flow control means is arranged to be displaced as a consequence of suction depressure that arises in one of the feed pipes due to the displacement of oil in the oil pan during acceleration/deceleration/tilting of the vehicle.
  • channels 22e and 22f connect the ends of the piston chamber 22d with the feed pipes 12 and 14 respectively, to transmit any depressure generated in the feed pipes 12 and 14.
  • Figure 3 shows the position of the flow control means 22 in the piston chamber 22d when the vehicle in which the oil feeding system 10 is mounted is not accelerating/decelerating or tilting and thus when the suction depressure in both feed pipes 12 and 14 is substantially the same.
  • oil 16 in the oil pan 18 will be displaced to the S-side of the oil pan 18 as shown in figure 4 . Since the oil inlet 14a located at the N-side of the oil pan 18 will start to suck air (and not oil) into the feed pipe 14, less depressure will occur in that feed pipe 14, causing the flow control means 22 to move towards the suction pipe with the most depressure (the S-side to which most oil has been displaced). This will cause piston 22c to block the feed pipe 14 if air is sucked into its oil inlet 14a.
  • Figure 5 shows a passenger car 30 travelling along an inclined surface 32.
  • the car 30 comprises an engine whose position is indicated by the dashed line 34 in figure 5 .
  • the engine 34 comprises at least one oil feeding system according to an embodiment of the present invention (not shown).
  • the car 30 also comprises an ECU 36 that contains computer program code means arranged to cause a computer or a processor to determine whether the vehicle is accelerating/decelerating/turning/tilting at a rate/angle that exceeds a predetermined rate/angle, by analyzing data from an accelerometer or other sensors for example, and/or to send a signal to actuator means 38 that are arranged to displace the flow control means 22 of the oil feeding system accordingly.

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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)
  • Lubrication Of Internal Combustion Engines (AREA)
EP07107616.0A 2007-05-07 2007-05-07 Ölzufuhrsystem Active EP1990508B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07107616.0A EP1990508B1 (de) 2007-05-07 2007-05-07 Ölzufuhrsystem

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07107616.0A EP1990508B1 (de) 2007-05-07 2007-05-07 Ölzufuhrsystem

Publications (2)

Publication Number Publication Date
EP1990508A1 true EP1990508A1 (de) 2008-11-12
EP1990508B1 EP1990508B1 (de) 2015-07-08

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ID=38235323

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EP07107616.0A Active EP1990508B1 (de) 2007-05-07 2007-05-07 Ölzufuhrsystem

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EP (1) EP1990508B1 (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010015326A1 (de) * 2010-04-17 2011-10-20 Bayerische Motoren Werke Aktiengesellschaft Vorrichtung zum Absaugen von Schmiermittel
CN104863660A (zh) * 2014-12-19 2015-08-26 北汽福田汽车股份有限公司 动力总成润滑装置、利用其的润滑方法以及润滑系统
FR3061371A1 (fr) * 2016-12-22 2018-06-29 Renault S.A.S Machine electrique refroidie a circulation de fluide caloporteur controlee.
CN111237028A (zh) * 2020-03-24 2020-06-05 厦门林巴贺航空发动机股份有限公司 一种油底壳回油机构以及发动机
CN111561369A (zh) * 2019-02-13 2020-08-21 翰昂系统巴德霍姆堡有限责任公司 具有干式油底壳的冷却润滑系统
JP2020133633A (ja) * 2019-02-13 2020-08-31 ハンオン システムズ バート ホンブルク ゲーエムベーハー ドライサンプを備える冷却潤滑システム
CN112627931A (zh) * 2021-01-18 2021-04-09 武汉新港大洋汽车零部件有限公司 一种湿式油底壳及组件
CN112983593A (zh) * 2021-03-26 2021-06-18 重庆骐速科技有限公司 一种自动适应发动机倾斜的油底壳系统
CN113623096A (zh) * 2021-08-11 2021-11-09 东风越野车有限公司 一种油箱、供油系统和车辆
DE102021213688A1 (de) 2021-12-02 2023-06-07 Zf Friedrichshafen Ag Ölansaugung in einem Getriebegehäuse eines Kraftfahrzeugs
CN111237028B (zh) * 2020-03-24 2024-10-22 厦门林巴赫航空发动机有限公司 一种油底壳回油机构以及发动机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1866280A (en) * 1927-02-17 1932-07-05 Packard Motor Car Co Internal combustion engine
FR2196004A5 (de) * 1972-08-08 1974-03-08 Lancia Automobili
US6260534B1 (en) * 1998-12-28 2001-07-17 Motorenfabrik Hatz Gmbh & Co. Kg Oil pickup system for an internal combustion engine, notably a single-cylinder diesel engine
FR2860548A1 (fr) * 2003-10-07 2005-04-08 Renault Sa Crepine d'alimentation pour pompe a l'huile

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1866280A (en) * 1927-02-17 1932-07-05 Packard Motor Car Co Internal combustion engine
FR2196004A5 (de) * 1972-08-08 1974-03-08 Lancia Automobili
US6260534B1 (en) * 1998-12-28 2001-07-17 Motorenfabrik Hatz Gmbh & Co. Kg Oil pickup system for an internal combustion engine, notably a single-cylinder diesel engine
FR2860548A1 (fr) * 2003-10-07 2005-04-08 Renault Sa Crepine d'alimentation pour pompe a l'huile

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010015326A1 (de) * 2010-04-17 2011-10-20 Bayerische Motoren Werke Aktiengesellschaft Vorrichtung zum Absaugen von Schmiermittel
CN104863660A (zh) * 2014-12-19 2015-08-26 北汽福田汽车股份有限公司 动力总成润滑装置、利用其的润滑方法以及润滑系统
FR3061371A1 (fr) * 2016-12-22 2018-06-29 Renault S.A.S Machine electrique refroidie a circulation de fluide caloporteur controlee.
CN111561369A (zh) * 2019-02-13 2020-08-21 翰昂系统巴德霍姆堡有限责任公司 具有干式油底壳的冷却润滑系统
JP2020133633A (ja) * 2019-02-13 2020-08-31 ハンオン システムズ バート ホンブルク ゲーエムベーハー ドライサンプを備える冷却潤滑システム
CN111237028A (zh) * 2020-03-24 2020-06-05 厦门林巴贺航空发动机股份有限公司 一种油底壳回油机构以及发动机
CN111237028B (zh) * 2020-03-24 2024-10-22 厦门林巴赫航空发动机有限公司 一种油底壳回油机构以及发动机
CN112627931A (zh) * 2021-01-18 2021-04-09 武汉新港大洋汽车零部件有限公司 一种湿式油底壳及组件
CN112983593A (zh) * 2021-03-26 2021-06-18 重庆骐速科技有限公司 一种自动适应发动机倾斜的油底壳系统
CN113623096A (zh) * 2021-08-11 2021-11-09 东风越野车有限公司 一种油箱、供油系统和车辆
DE102021213688A1 (de) 2021-12-02 2023-06-07 Zf Friedrichshafen Ag Ölansaugung in einem Getriebegehäuse eines Kraftfahrzeugs

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