EP1537335A1 - Dispositif de regulation de la puissance de pompage d'une pompe a lubrifiant d'automobile - Google Patents

Dispositif de regulation de la puissance de pompage d'une pompe a lubrifiant d'automobile

Info

Publication number
EP1537335A1
EP1537335A1 EP03740393A EP03740393A EP1537335A1 EP 1537335 A1 EP1537335 A1 EP 1537335A1 EP 03740393 A EP03740393 A EP 03740393A EP 03740393 A EP03740393 A EP 03740393A EP 1537335 A1 EP1537335 A1 EP 1537335A1
Authority
EP
European Patent Office
Prior art keywords
oil
piston
pump
combustion engine
pressure
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
EP03740393A
Other languages
German (de)
English (en)
Other versions
EP1537335B1 (fr
Inventor
Peter Scholl
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche AG
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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of EP1537335A1 publication Critical patent/EP1537335A1/fr
Application granted granted Critical
Publication of EP1537335B1 publication Critical patent/EP1537335B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/18—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber
    • F04C14/22—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members
    • F04C14/223—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members using a movable cam
    • F04C14/226—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members using a movable cam by pivoting the cam around an eccentric axis
    • 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
    • F01M1/16—Controlling lubricant pressure or quantity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C2/3441—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
    • F04C2/3442—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation the surfaces of the inner and outer member, forming the working space, being surfaces of revolution
    • 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

Definitions

  • the invention relates to a device for regulating the pump output of a lubricant pump for an internal combustion engine according to the preamble of patent claim 1.
  • a control valve is connected upstream of the interior of the piston valve, by means of which the differential pressure between the front and rear of the piston valve can be changed and the opening oil pressure can thus be adjusted.
  • a vane pump with variable delivery volume is known, in which the volume flow can be adjusted by changing the position of the cam ring relative to the rotor axis of rotation.
  • an additional limitation of the delivery volume depending on the temperature and / or the speed of the engine is proposed. This requires complex temperature-dependent actuators as well as additional pressure control systems which, in addition to the maximum oil pressure limitation, cause an adjustment of the stroke ring of the vane pump and thus, if necessary, a reduction in the delivered oil volume flow.
  • the drive power required for supplying lubricating oil to the internal combustion engine can be controlled in a simple manner in a vane cell pump as a function of operating parameters of the internal combustion engine.
  • This enables the oil pressures required for the various operating states of the engine to be set or adjusted, so that, owing to the reduced power consumption compared to an uncontrolled oil pump, there is further fuel saving potential.
  • the proposed device for reducing the oil pressure can be easily retrofitted to vane pumps that are already in operation. As a result of the features specified in the subclaims, further advantageous refinements and improvements of the regulation of the pump output of a lubricant pump according to the invention are possible.
  • the force directed against the engine oil pressure on the piston rear side of the pressure control valve is generated by a spiral spring which is guided and supported in a receiving opening provided on the rear side of the piston.
  • a valve element is integrated in a hydraulic line leading from the control valve to the tank, via which the oil flow that can be returned to the suction side of the oil pump can be adjusted
  • the oil pressure or the oil volume flow conveyed by the oil pump is controlled depending on operating parameters of the internal combustion engine, such as speed, load or engine oil temperature.
  • FIG. 1 is a schematic overall view of a device for controlling the pumping capacity of a vane pump in a first operating position
  • Fig. 2 shows the device in a second operating position
  • Fig. 3 is a graphical representation of an operating point-dependent oil pressure control
  • Fig. 4 is a block diagram for a calibrated oil pressure control. Description of the embodiment
  • the vane pump 2 shown schematically in FIGS. 1 and 2 has a rotor 4 which is connected in a rotationally fixed manner to a drive shaft 6. Radially outwardly extending recesses 8 are provided in the rotor 4, in which longitudinally displaceable rotor blades 10 are received in a known manner.
  • the rotor 4 and the rotor blades 10 accommodated therein are enclosed by a cam ring 12, so that corresponding oil delivery spaces 14 are formed between the rotor 4, cam ring 12 and between two adjacent rotor blades 10.
  • the cam ring 12 is pivotally mounted about an axis 16 at a point fixed to the housing; its position with respect to the rotor axis of rotation can thus be changed in order to set a specific oil flow rate per revolution.
  • the cam ring 12 has a hinge tongue 18 opposite the bearing axis 16, which is provided with a guide pin 20 which cooperates with a link window 22 of an actuating rod 24 in the manner of a link guide.
  • the actuating rod 24 is connected to the outer circumference of an actuating piston 28 guided in a pressure control valve 26.
  • a first pressure chamber 36 is formed between the housing 32 and the piston front side 34 and is connected to the pressure side of the vane pump 2.
  • a receiving opening 38 is provided in the adjusting piston 28, in which a spiral spring 40 is received or guided.
  • the spiral spring 40 is supported at one end on the bottom of the piston rear side 37 and at its other end on a closure element 42 of the pressure control valve 26.
  • a second pressure chamber 44 is formed between the closure element 42 and the piston rear side and is connected to the inlet 50 of a control valve 52 via an opening 46 provided in the closure element 42 and a hydraulic line 48 connected to it.
  • the input 50 of the control valve 52 is monitored by an actuating piston 54, which is controlled by an electromagnet 56 provided on the control valve 52.
  • the output 58 of the control valve 52 is connected to the oil tank or the oil reservoir 60 of the internal combustion engine, in which the suction side of the vane pump 2 is in turn opens.
  • the two pressure chambers 36 and 44 formed in the pressure control valve 26 are connected via a throttle formed in the actuating piston 28, which in the present exemplary embodiment is designed as a stepped bore 62.
  • the functioning of the device for regulating the pump output of the vane pump is explained in more detail below.
  • the vane pump which is rigidly driven by the engine of the internal combustion engine, delivers a specific oil volume flow to the consumers of the internal combustion engine as a function of operating parameters, which are explained in more detail with reference to the control diagram in FIG. 3.
  • the pressure room which is rigidly driven by the engine of the internal combustion engine, delivers a specific oil volume flow to the consumers of the internal combustion engine as a function of operating parameters, which are explained in more detail with reference to the control diagram in FIG. 3.
  • the pressure room which is rigidly driven by the engine of the internal combustion engine
  • the oil volume flow delivered by the vane pump 2 can be between a maximum delivery amount
  • a zero delivery rate can be set continuously.
  • the control of the pressure control valve 26, which is explained in more detail below, can, as already explained at the outset, further reduce the drive power consumed by the vane pump 2 as a function of operating parameters, such as speed, oil temperature or load state of the internal combustion engine, and the oil delivery quantity and
  • the control piston 54 of the control valve 52 is controlled via a characteristic field stored in the engine control unit. In the position of the actuating piston 54 shown in FIG. 1, the inlet 50 of the control valve 52 is completely closed; so that the pressure in the first and in the second pressure chamber 36, 44 is the same, so that the
  • adjusting piston 28 assumes a position within the valve bore 30 due to the spiral spring 40, in which the eccentricity of the position of the cam ring 12 is maximum with respect to the rotor axis of rotation of the vane pump 2. If the actuating piston 54 releases the input 50 (see FIG. 2), a certain oil volume flow flows via the stepped bore 62 via the hydraulic line 48 to the oil reservoir 60 and thus to
  • any oil volume flows that are adapted to the corresponding oil pressure requirement of the engine can be set depending on the oil temperature and speed of the internal combustion engine. For example, at low speeds a significantly lower oil pressure is required for an adequate bearing supply than at high speeds. Extremely high or low oil temperatures require a higher oil pressure, on the one hand to meet the higher cooling requirements of the bearings and on the other hand to be able to compensate for the line pressure loss and the bearing inlet pressure at low oil temperatures. In addition, if the engine's high load condition is signaled by the position of the throttle valve, a higher oil pressure is required than for small and medium-sized loads.
  • Self-calibration is also provided in connection with the proposed operating point-dependent oil pressure control. As illustrated in FIG. 4, the target oil pressure is compared with the actual oil pressure. If the actual oil pressure deviates from the target oil pressure by a previously defined ⁇ p, the control curve is indicated by a Correction factor shifted until the ⁇ p meets the specified criterion.
  • the background for the proposed self-calibration is the fact that the oil requirement of the engine changes over its service life due to bearing wear, pump wear or changing oil viscosity.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Fuel-Injection Apparatus (AREA)
EP03740393A 2002-08-28 2003-07-01 Dispositif de regulation de la puissance de pompage d'une pompe a lubrifiant d'automobile Expired - Lifetime EP1537335B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10239364 2002-08-28
DE10239364A DE10239364A1 (de) 2002-08-28 2002-08-28 Einrichtung zur Regelung der Pumpleistung einer Schmiermittelpumpe für eine Brennkraftmaschine
PCT/EP2003/006971 WO2004020831A1 (fr) 2002-08-28 2003-07-01 Dispositif de regulation de la puissance de pompage d'une pompe a lubrifiant d'automobile

Publications (2)

Publication Number Publication Date
EP1537335A1 true EP1537335A1 (fr) 2005-06-08
EP1537335B1 EP1537335B1 (fr) 2008-09-24

Family

ID=31724118

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03740393A Expired - Lifetime EP1537335B1 (fr) 2002-08-28 2003-07-01 Dispositif de regulation de la puissance de pompage d'une pompe a lubrifiant d'automobile

Country Status (6)

Country Link
US (1) US7549848B2 (fr)
EP (1) EP1537335B1 (fr)
JP (1) JP2005520096A (fr)
AT (1) ATE409285T1 (fr)
DE (2) DE10239364A1 (fr)
WO (1) WO2004020831A1 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
WO2012120213A1 (fr) 2011-03-10 2012-09-13 Peugeot Citroen Automobiles Sa Systeme de lubrification d'un moteur thermique, comprenant une pompe a huile a cylindree variable

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US20070231161A1 (en) * 2004-09-20 2007-10-04 Mathew Williamson Pump with Selectable Outlet Pressure
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TR201819627T4 (tr) 2004-12-22 2019-01-21 Magna Powertrain Usa Inc Değişken kapasiteli pompayı çalıştırmaya yönelik yöntem.
US9181803B2 (en) 2004-12-22 2015-11-10 Magna Powertrain Inc. Vane pump with multiple control chambers
DE102005006703A1 (de) * 2005-02-15 2006-08-17 Audi Ag Vorrichtung und Verfahren zur Schmierölversorgung
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DE102005038204A1 (de) * 2005-08-12 2007-02-15 Dr.Ing.H.C. F. Porsche Ag Einrichtung zur Steuerung der Schmierölversorgung für Antriebsaggregate
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Also Published As

Publication number Publication date
JP2005520096A (ja) 2005-07-07
DE10239364A1 (de) 2004-03-18
ATE409285T1 (de) 2008-10-15
DE50310547D1 (de) 2008-11-06
US20050232785A1 (en) 2005-10-20
EP1537335B1 (fr) 2008-09-24
US7549848B2 (en) 2009-06-23
WO2004020831A1 (fr) 2004-03-11

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