EP2093393A1 - Schmierkreislauf und dazugehörige Pumpe - Google Patents

Schmierkreislauf und dazugehörige Pumpe Download PDF

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Publication number
EP2093393A1
EP2093393A1 EP09151707A EP09151707A EP2093393A1 EP 2093393 A1 EP2093393 A1 EP 2093393A1 EP 09151707 A EP09151707 A EP 09151707A EP 09151707 A EP09151707 A EP 09151707A EP 2093393 A1 EP2093393 A1 EP 2093393A1
Authority
EP
European Patent Office
Prior art keywords
pump
oil
engine
crankshaft
variable displacement
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
EP09151707A
Other languages
English (en)
French (fr)
Other versions
EP2093393B1 (de
Inventor
Jérome Portier
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.)
PSA Automobiles SA
Original Assignee
Peugeot Citroen Automobiles SA
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 Peugeot Citroen Automobiles SA filed Critical Peugeot Citroen Automobiles SA
Publication of EP2093393A1 publication Critical patent/EP2093393A1/de
Application granted granted Critical
Publication of EP2093393B1 publication Critical patent/EP2093393B1/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
    • F01M1/00—Pressure lubrication
    • F01M1/02—Pressure lubrication using lubricating pumps
    • 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
    • F01M1/00—Pressure lubrication
    • F01M1/02—Pressure lubrication using lubricating pumps
    • F01M2001/0207—Pressure lubrication using lubricating pumps characterised by the type of pump
    • F01M2001/0238—Rotary pumps
    • 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
    • F01M1/00—Pressure lubrication
    • F01M1/02—Pressure lubrication using lubricating pumps
    • F01M2001/0207—Pressure lubrication using lubricating pumps characterised by the type of pump
    • F01M2001/0246—Adjustable pumps
    • 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
    • F01M1/00—Pressure lubrication
    • F01M1/02—Pressure lubrication using lubricating pumps
    • F01M2001/0253—Pressure lubrication using lubricating pumps characterised by the pump driving means
    • F01M2001/0269—Pressure lubrication using lubricating pumps characterised by the pump driving means driven by the crankshaft

Definitions

  • the invention relates to a lubrication circuit of an internal combustion engine.
  • the circuit described in the present invention makes it possible to reduce the energy losses without penalizing other services, in particular the total volume of oil present in the circuit. This is achieved by the judicious integration of a variable displacement pump, preferably at the end of the crankshaft.
  • the invention also relates to a variable displacement pump capable of being implanted in such a circuit.
  • an internal combustion engine In operation, an internal combustion engine involves many moving mechanical elements. To prevent wear of moving parts, as well as to limit friction and associated energy losses, these parts must be lubricated.
  • the engine therefore comprises a lubricant circuit responsible for supplying oil to the various components of the engine to be lubricated.
  • the lubricant traditionally used in an internal combustion engine is usually oil, we use these two terms in an equivalent way.
  • At least one positive displacement pump generally with fixed displacement, makes it possible to ensure adequate circulation of oil in the circuit. It is usually a pump mechanically actuated by the motor, by direct drive, or through a mechanical link that can be a chain or cascade of gears.
  • the amount of oil required for proper lubrication of the engine depends essentially on its speed. However, the variation of the oil flow rate in the circuit caused by the rotational speed variation of the pump does not correspond to the oil flow variation that would be strictly necessary for the good lubrication of the engine.
  • the pumps are generally sized to provide the maximum flow required. This implies that the pump is oversized for most engine operating points. An excessive quantity of oil is then sent into the circuit, which quantity is generally regulated by a pressure relief valve. If this system provides a mechanically satisfactory response, it generates significant energy losses in the circuit, and a couple of training to impose on the pump higher than it should be to ensure the adequate flow of lubricant.
  • variable displacement pump in the lubrication circuit of an engine.
  • Such pumps include a controller that can be moved to vary the displacement of the pump.
  • a feedback mechanism is generally present: oil pressurized by the pump actuates the control member, which causes the displacement of the displacement of the pump to avoid overpressure in the circuit.
  • This type of pump can be of the "paddle" type.
  • the control member is then a ring, eccentric of the driving axis of the pump and mobile, which allows the variation of the volume of small rooms defined by pallets.
  • the patent US4342545 presents such a pump.
  • small engines can adopt a 3 or even 2-cylinder architecture, which makes it necessary to use a balancing shaft to compensate for the unequal distribution of the masses of inertia inherent in these architectures.
  • the balancing systems are necessarily positioned at the bottom of the engines, thus limiting the capacity of the oil tank.
  • the use of a particulate filter on a diesel engine can cause a phenomenon of dilution of the oil with fuel and the increase of the carbon content (oil wear) during regeneration of the filter by post -injection of fuel into the engine. These phenomena affect the lubricity of the oil.
  • a simple way to counter this phenomenon is to guarantee a maximum volume of oil to limit the dilution rate.
  • the present invention is therefore particularly advantageous in the context of non-exclusive low-cylinder diesel engines, 2 or 3 cylinders and provided with a pollution control system generating pollution or accelerated dilution of the oil.
  • the solution to these problems is to position directly on one of the faces of the engine perpendicular to the axis of rotation of the crankshaft of the engine, and more particularly at the end of the crankshaft, a variable displacement pump ensuring the circulation.
  • lubricant in a lubrication circuit of an internal combustion engine is maximized, while allowing the energy gain associated with the use of a variable displacement pump.
  • the variable displacement pump preferably used is of the pallet type.
  • one of the challenges of the present invention is to use a sufficiently compact device to release volume in the oil tank, without being penalizing in terms of size or implantation.
  • the variable vane pump technology with pallets allows, thanks to a work of optimization and dimensioning at the fairest, to keep substantially the same volume and the same external geometry as a conventional fixed geometry pump.
  • the invention also relates to such a variable displacement vane pump that can be used in a lubricant circuit as described in the invention.
  • the pump is remarkable in that it has a particular interface for its direct actuation by the crankshaft of the engine. More particularly, this interface comprises at least one flat part allowing the rotational drive of the pump by the crankshaft.
  • the present invention is however not limited to the use of this type of pump, and can also relate to a lubrication circuit comprising a variable displacement pump with pinions or any other type of variable displacement pump.
  • the invention therefore relates to a lubrication circuit of a combustion engine comprising a main branch passing through an oil reservoir and the combustion engine and comprising a variable displacement pump, preferably of the pallet type, to ensure the circulation of the oil in the circuit, characterized in that said pump is positioned on one of the faces of the engine perpendicular to the axis of rotation of the crankshaft of the engine.
  • the variable displacement pump is driven directly by the crankshaft, without bringing into play intermediate mechanical transmission elements.
  • the pump is then preferably mounted end crankshaft.
  • the variable displacement pump has a direct drive interface by the crankshaft having at least one flat, and preferably two, ensuring the rotational drive of the pump.
  • Such a pump is also the subject of the present invention.
  • One or more grooves can also be arranged on this interface.
  • the figure 1 shows a partial view of the lubrication circuit of an internal combustion engine with an oil pump implanted in accordance with the present invention.
  • the figure 2 presents a variable displacement oil pump according to the invention.
  • the figure 3 shows the power absorbed as a function of the engine speed with a fixed displacement pump and with a variable displacement pump installed according to the present invention.
  • the lubrication circuit of the present invention comprises a reservoir 1 (oil tank), for containing oil for the lubrication of a motor 2.
  • a pump 3 circulates the oil in the main branch 4 of the circuit, which supplies the engine with lubricant.
  • Pump 3 is a vane-type variable-rate pump. This type of pump is implanted in the prior art in the oil tank 1. In the invention, the pump 3 is located in a zone that does not penalize the volume of the oil tank.
  • the pump 3 is located directly at the end of the crankshaft 5, on a face of the engine 2 perpendicular to the axis of rotation of the crankshaft 5.
  • the pump 3 is rotated directly by the crankshaft 5, without putting into play intermediate transmission system, which could lead to less reliability as well as energy losses.
  • the variable displacement pump preferably used is of the pallet type.
  • the pump presented in figure 2 is an example of a pump designed to be used in a lubrication circuit according to the present invention, and it is also the object.
  • This pump comprises movable vanes 31 and an adjusting ring 32 for varying the displacement of the pump.
  • This ring is mobilized by the pressure of the oil at the pump outlet 33 or, in another variant of the pump, by an oil return expressing the pressure at the engine inlet.
  • the pump presented in figure 2 is not equipped with this return. The oil enters the pump through the inlet 34 and out of the outlet 33.
  • this pump vis-à-vis the variable displacement pumps known in the prior art is to be actuated in rotation around its main axis directly by the crankshaft 5, which has a shape concordant with the interface of the pump created for this purpose.
  • the interface of the pump with the crankshaft is provided with at least one flat part 35, and preferably with two flats, and possibly comprises at least one groove 36.
  • the figure 3 allows to understand the energy gain obtained with the use of a variable displacement pump.
  • the rotational speed of the engine in revolutions per minute (rpm) the ordinate is carried a power index absorbed by the pump.
  • the power consumption index is 1.
  • the dotted line corresponds to the power absorbed by a fixed geometry pump, while the solid line corresponds to the power absorbed by a variable geometry pump on the same application.
  • a discharge valve opens in the case of the use of a fixed geometry pump, but the absorbed power continues to increase in proportion to the speed of rotation of the motor, and therefore the pump.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
EP20090151707 2008-02-25 2009-01-30 Schmierkreislauf und dazugehörige Pumpe Active EP2093393B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0851177A FR2927942A1 (fr) 2008-02-25 2008-02-25 Circuit de lubrification et pompe associee.

Publications (2)

Publication Number Publication Date
EP2093393A1 true EP2093393A1 (de) 2009-08-26
EP2093393B1 EP2093393B1 (de) 2012-12-12

Family

ID=39874008

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20090151707 Active EP2093393B1 (de) 2008-02-25 2009-01-30 Schmierkreislauf und dazugehörige Pumpe

Country Status (3)

Country Link
EP (1) EP2093393B1 (de)
ES (1) ES2397495T3 (de)
FR (1) FR2927942A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113323738A (zh) * 2021-07-19 2021-08-31 奇瑞汽车股份有限公司 发动机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107178400B (zh) * 2017-07-10 2019-06-14 奇瑞汽车股份有限公司 三缸发动机润滑系统

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4342545A (en) 1978-07-24 1982-08-03 General Motors Corporation Variable displacement pump
WO1992015773A1 (en) * 1991-03-05 1992-09-17 Saab Automobile Aktiebolag Hydraulic pump for a vehicle engine
US6179582B1 (en) * 1998-09-10 2001-01-30 Nissan Motor Co., Ltd. Oil pump attachment structure for engine
EP1586750A1 (de) * 2004-04-16 2005-10-19 BorgWarner Inc. Verfahren und Vorrichtung zur mechanischen Verwendung von Flüssigkeit unter Druck aus dem Schmierkreislauf
US7171939B1 (en) * 2005-09-30 2007-02-06 S&S Cycle, Inc. Integrated cam drive and oil pump assembly for motorcycle engines and the like
WO2007087704A1 (en) * 2006-01-31 2007-08-09 Magna Powertrain Inc. Variable displacement variable pressure vane pump system
US20070277751A1 (en) * 2006-06-02 2007-12-06 Ching-Huei Lin Oil pump for motorcycle

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4342545A (en) 1978-07-24 1982-08-03 General Motors Corporation Variable displacement pump
WO1992015773A1 (en) * 1991-03-05 1992-09-17 Saab Automobile Aktiebolag Hydraulic pump for a vehicle engine
US6179582B1 (en) * 1998-09-10 2001-01-30 Nissan Motor Co., Ltd. Oil pump attachment structure for engine
EP1586750A1 (de) * 2004-04-16 2005-10-19 BorgWarner Inc. Verfahren und Vorrichtung zur mechanischen Verwendung von Flüssigkeit unter Druck aus dem Schmierkreislauf
US7171939B1 (en) * 2005-09-30 2007-02-06 S&S Cycle, Inc. Integrated cam drive and oil pump assembly for motorcycle engines and the like
WO2007087704A1 (en) * 2006-01-31 2007-08-09 Magna Powertrain Inc. Variable displacement variable pressure vane pump system
US20070277751A1 (en) * 2006-06-02 2007-12-06 Ching-Huei Lin Oil pump for motorcycle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113323738A (zh) * 2021-07-19 2021-08-31 奇瑞汽车股份有限公司 发动机
WO2023000661A1 (zh) * 2021-07-19 2023-01-26 奇瑞汽车股份有限公司 发动机

Also Published As

Publication number Publication date
FR2927942A1 (fr) 2009-08-28
EP2093393B1 (de) 2012-12-12
ES2397495T3 (es) 2013-03-07

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