EP1873363A2 - Pumpe mit variabler Förderleistung und Steuerung dafür - Google Patents

Pumpe mit variabler Förderleistung und Steuerung dafür Download PDF

Info

Publication number
EP1873363A2
EP1873363A2 EP07075612A EP07075612A EP1873363A2 EP 1873363 A2 EP1873363 A2 EP 1873363A2 EP 07075612 A EP07075612 A EP 07075612A EP 07075612 A EP07075612 A EP 07075612A EP 1873363 A2 EP1873363 A2 EP 1873363A2
Authority
EP
European Patent Office
Prior art keywords
pressure
engine
solenoid
pump
oil
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
EP07075612A
Other languages
English (en)
French (fr)
Other versions
EP1873363A3 (de
EP1873363B1 (de
Inventor
Douglas Hunter
Dennis Koenig
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.)
SLW Automotive Inc
Original Assignee
BorgWarner Inc
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 BorgWarner Inc filed Critical BorgWarner Inc
Priority claimed from US10/406,575 external-priority patent/US7018178B2/en
Publication of EP1873363A2 publication Critical patent/EP1873363A2/de
Publication of EP1873363A3 publication Critical patent/EP1873363A3/de
Application granted granted Critical
Publication of EP1873363B1 publication Critical patent/EP1873363B1/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

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
    • F01M1/16—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
    • 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
    • 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
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/01—Load
    • 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
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/05—Speed
    • F04C2270/052—Speed angular
    • 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
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/18—Pressure

Definitions

  • the present invention relates to the control of the output of a variable displacement pump. More specifically, the present invention relates to control of an oil pump for oil pressure control in an internal combustion engine, transmission or the like.
  • a control system for a hydraulic variable displacement vane-type pump wherein input from an engine control unit actuates a solenoid for controlling the engine oil pressure to the desired level under any operating conditions.
  • Figure 1 is a hydraulic schematic showing a first embodiment of the present invention
  • Figure 2 is a hydraulic schematic showing a second embodiment of the present invention
  • Figure 2a is a variation of the second embodiment of the present invention.
  • Figure 3 is a hydraulic schematic showing a third embodiment of the present invention.
  • Figure 4 is a hydraulic schematic showing a forth embodiment of the present invention.
  • Figure 5 is a hydraulic schematic showing a fifth embodiment of the present invention.
  • Figure 6 is a hydraulic schematic showing a sixth embodiment of the present invention.
  • Figure 7 is a hydraulic schematic showing a seventh embodiment of the present invention.
  • Figure 8 is a hydraulic schematic showing an eighth embodiment of the present invention.
  • a method of controlling a variable displacement pump 10 for an engine is provided.
  • the solenoid 26 is normally, or is defaulted to, the closed position when no power is supplied to the solenoid 26.
  • the solenoid 26 When the solenoid 26 is in the closed position there will be high fluid displacement by the pump 10.
  • an emergency event such as when there is an electrical failure, the solenoid 26 will move to its default position so the engine oil pressure will remain high and that the vehicle can continue operating until it can serviced.
  • the solenoid in a closed position the system could also be configured so that there is fluid displacement with the pump 10.
  • the pump is a vane-type variable displacement pump, as set forth in co-pending application Serial No. 10/021,566, filed December 12, 2000 , the specification of which is incorporated by reference herein.
  • the pump is designed for an engine lubrication circuit.
  • the pump is generally shown at 10.
  • the pump 10 may be a vane pump which has the displacement varied by movement of an eccentric ring 11. It is also possible to incorporate other types of pumps, in which the stroke or displacement may be adjusted during operation.
  • a flow control valve 12 is used to mechanically vary the displacement of a pump 10, by moving the eccentric ring 11, based on an engine pilot pressure 14 acting on the flow control valve 12 which controls the volume of oil in each control chamber on each side of the eccentric ring 11.
  • a compression spring 16 acts against a pilot pressure 14 for maintaining some pressure on the flow control valve 12 and to provide a return pressure in absence of the pilot pressure 14.
  • the flow control valve 12 in this particular embodiment is a spool valve such as a three-way spool valve.
  • the flow control valve 12 can be a spool valve of any type of configuration.
  • the flow control valve 12 does not necessarily need to be a spool valve at all, as will be seen in Figure 6.
  • the compression spring 16 gives the spool portion of the valve 12 travel distance that is proportional to the differential between the actual pressure of the system and the desired or target system pressure.
  • the differential pressure is variable by way of a valve 18, which controls the amount of pressure acting on the variable target piston 20 against spring 22 for varying the amount of spring 16 pressure on valve 12.
  • An engine control unit (ECU) 24 monitors the engine conditions and parameters such as temperature, speed and engine load. In this embodiment, the engine control unit 24 monitors the engine conditions pressure, speed, and engine load and then selects a desired oil pressure, and sends the appropriate current to the solenoid 26 acting on valve 18. This varies the pressure acting on the piston 20, changing its position and thereby reducing or increasing target pressure, depending upon the desired engine oil pressure target.
  • the flow control valve 12 then regulates the pump's 10 eccentric ring 11 to maintain target pressure.
  • valve 112a includes a closed center valve portion 112b.
  • the main operating difference is the use of a pressure reducing and regulating valve 128.
  • the regulating valve 128 creates a fixed input pressure for the solenoid valve 118 in that the pressure, which in Figure 1 was taken from the discharge port of the pump 10 into the solenoid control valve 18, is now at a constant pressure and, therefore, provides better control of the variable target pressure acting on piston 120. This ultimately provides improved control over the desired movement of the eccentric ring 111 of the pump 110.
  • Fig. 2a operates in a similar manner as Fig. 2.
  • the main difference between Fig. 2 and Fig. 2a is that the pressure reducing and regulating valve 128 of Fig. 2a creates a fixed target pressure that acts directly on the piston 120.
  • the solenoid 126 opens or closes to further adjust the pressure of fluid acting on the piston 120.
  • the solenoid 126 moves the valve 118a to the closed position there is an increase in variable target pressure.
  • the solenoid 126 moves the valve 118a to the open position the variable target pressure will decrease as the fluid moves to the sump with less resistance.
  • unreduced pressure is fed to the spool valve 112A before pressure the pressure reducing and regulating valve 128 after the filter.
  • this embodiment is also a passive system for controlling oil flow and oil pressure since an engine control unit 124 controls the solenoid 126 for positioning the piston 120, however, the engine control unit 124 does not directly sense oil pressure.
  • the solenoid 326 directly controls the movement of the variable target piston 320.
  • the engine control unit 324 is connected to the solenoid 326 and controls the actuation of the solenoid.
  • the configuration of this embodiment i.e., the solenoid acting directly on the variable target piston 320
  • this embodiment includes a solenoid 426 attached to the flow control spool valve 412 directly, to regulate the stroke or de-stroke conditions of the pump 410.
  • the solenoid 426 is connected directly to the engine control unit 424.
  • the engine control unit 424 samples the pilot pressure from a pressure transducer in the engine circuit in order to make the proper calculations as to the best spool position based on the current actual and target pressures.
  • Return spring 416 provides the return pressure for adjusting the flow control spool valve 412 in absence of solenoid 426 input, and allows for predetermined functions of spool position versus current.
  • FIG. 6 like items referenced in Figure 5 are similarly designated with reference numerals differing by 100.
  • a very simple control mechanism is used by the control solenoid 526 moving a valve 512A for controlling the de-stroke actuator of the pump 510.
  • the solenoid 526 adjusts the pressure acting on the large piston which pushes against the discharge pressure acting on the small piston on the opposite side.
  • An on-stroke return spring is provided for balancing the eccentric control ring against control inputs which can also work alone (as shown).
  • the engine control unit 524 samples the pilot pressure from a pressure transducer in the engine circuit in order to make the proper calculations as to the best valve 512A position.
  • Figure 7 is another embodiment wherein engine control unit 624 directly controls a solenoid 626 which acts directly on either the actuating piston for the eccentric ring or directly on the eccentric ring. This allows direct control of the displacement of the pump 610 based on ECU 624 monitoring of the pilot pressure of the oil pressure circuit.
  • Figure 8 illustrates a further embodiment wherein the solenoid 726 directly actuates the spool flow control valve 712.
  • the ECU 724 is monitoring the engine oil circuit pressure and adjusting the solenoid in accordance with the necessary engine oil pressure, as calculated by the ECU.
  • pressure from the discharge is reduced by the solenoid valve and used to bias the position of the flow control spool valve 712 against the spring for varying the displacement of the pump.
  • Flow across the solenoid can be directed to the inlet port, as shown of the vane pump 710, but can also be drained to the sump.
  • Figures 1 through 4 are passive systems which allow the ECU to monitor engine conditions and provide a pressure target to the pump system, but the pump system is self-regulated to the pressure target by mechanical and hydraulic controls.
  • Figures 5 through 8 provide active control of the oil pressure by the ECU. In these embodiments, the ECU monitors the oil pressure and actively adjusts the system on a real time basis to control oil pressure in the engine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)
EP07075612A 2002-04-03 2003-04-03 Pumpe mit variabler Förderleistung und Steuerung dafür Expired - Fee Related EP1873363B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US36982902P 2002-04-03 2002-04-03
US10/406,575 US7018178B2 (en) 2002-04-03 2003-04-03 Variable displacement pump and control therefore for supplying lubricant to an engine
EP03252133.8A EP1350930B2 (de) 2002-04-03 2003-04-03 Regelbare Verdrängerpump sowie Steursystem dafür

Related Parent Applications (3)

Application Number Title Priority Date Filing Date
EP03252133.8A Division EP1350930B2 (de) 2002-04-03 2003-04-03 Regelbare Verdrängerpump sowie Steursystem dafür
EP03252133.8A Division-Into EP1350930B2 (de) 2002-04-03 2003-04-03 Regelbare Verdrängerpump sowie Steursystem dafür
EP03252133.8 Division 2003-04-03

Publications (3)

Publication Number Publication Date
EP1873363A2 true EP1873363A2 (de) 2008-01-02
EP1873363A3 EP1873363A3 (de) 2008-04-23
EP1873363B1 EP1873363B1 (de) 2010-07-21

Family

ID=38748089

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07075612A Expired - Fee Related EP1873363B1 (de) 2002-04-03 2003-04-03 Pumpe mit variabler Förderleistung und Steuerung dafür

Country Status (1)

Country Link
EP (1) EP1873363B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012009951A1 (de) 2012-05-18 2013-11-21 Thomas Magnete Gmbh Schaltventil mit einer Ventilhülse aus Kunststoff
CN104047665A (zh) * 2014-06-06 2014-09-17 湖南机油泵股份有限公司 一种电磁阀控单作用腔反馈可变排量叶片泵的控制系统
DE102014012306A1 (de) 2014-08-19 2016-02-25 Thomas Magnete Gmbh Steuerventil mit Bauteilen aus Kunststoff

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0945619A1 (de) 1997-09-29 1999-09-29 Hitachi Construction Machinery Co., Ltd. Drehmomentregelungsvorrichtung für eine hydraulische pumpe oder arbeitsvorrichtung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5545014A (en) * 1993-08-30 1996-08-13 Coltec Industries Inc. Variable displacement vane pump, component parts and method
US5876185A (en) * 1996-11-20 1999-03-02 Caterpillar Inc. Load sensing pump control for a variable displacement pump
US6202016B1 (en) * 1999-08-10 2001-03-13 Eaton Corporation Shift on the go transmission system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0945619A1 (de) 1997-09-29 1999-09-29 Hitachi Construction Machinery Co., Ltd. Drehmomentregelungsvorrichtung für eine hydraulische pumpe oder arbeitsvorrichtung

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012009951A1 (de) 2012-05-18 2013-11-21 Thomas Magnete Gmbh Schaltventil mit einer Ventilhülse aus Kunststoff
CN104047665A (zh) * 2014-06-06 2014-09-17 湖南机油泵股份有限公司 一种电磁阀控单作用腔反馈可变排量叶片泵的控制系统
CN104047665B (zh) * 2014-06-06 2016-08-24 湖南机油泵股份有限公司 一种电磁阀控单作用腔反馈可变排量叶片泵的控制系统
DE102014012306A1 (de) 2014-08-19 2016-02-25 Thomas Magnete Gmbh Steuerventil mit Bauteilen aus Kunststoff

Also Published As

Publication number Publication date
EP1873363A3 (de) 2008-04-23
EP1873363B1 (de) 2010-07-21

Similar Documents

Publication Publication Date Title
US7396214B2 (en) Variable displacement pump and control therefor
EP1790855B1 (de) Hydraulisches Pumpensystem mit variablen Durchsatz und Druck
EP2066904B1 (de) Steuersystem und verfahren zur pumpenausgangsdrucksteuerung
KR101753419B1 (ko) 윤활유 펌프 시스템
EP1979616B1 (de) Verstellflügelpumpensystem mit gleitdruck
JP4776203B2 (ja) 可変目標調整器を備えた可変容量形ベーンポンプ
JP5873109B2 (ja) 選択可能な出口圧力を有する油ポンプ
US8512006B2 (en) Hydraulic pump with variable flow and pressure and improved open-loop electric control
US8430645B2 (en) Two stage pressure regulation system for variable displacement hydraulic pumps
EP1873363B1 (de) Pumpe mit variabler Förderleistung und Steuerung dafür
CN112105818B (zh) 汽车可变机械润滑油泵
CN111094700B (zh) 可变排量润滑剂叶片泵
US20040101420A1 (en) Solenoid regulated pump assembly

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AC Divisional application: reference to earlier application

Ref document number: 1350930

Country of ref document: EP

Kind code of ref document: P

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR

17P Request for examination filed

Effective date: 20080529

17Q First examination report despatched

Effective date: 20080626

AKX Designation fees paid

Designated state(s): DE FR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SLW AUTOMOTIVE INC.

AC Divisional application: reference to earlier application

Ref document number: 1350930

Country of ref document: EP

Kind code of ref document: P

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR

REF Corresponds to:

Ref document number: 60333503

Country of ref document: DE

Date of ref document: 20100902

Kind code of ref document: P

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20110426

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 60333503

Country of ref document: DE

Effective date: 20110426

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20111230

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110502

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20190318

Year of fee payment: 17

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 60333503

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20201103