EP1236895B1 - Elektromagnetische Pumpe - Google Patents

Elektromagnetische Pumpe Download PDF

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Publication number
EP1236895B1
EP1236895B1 EP20020004697 EP02004697A EP1236895B1 EP 1236895 B1 EP1236895 B1 EP 1236895B1 EP 20020004697 EP20020004697 EP 20020004697 EP 02004697 A EP02004697 A EP 02004697A EP 1236895 B1 EP1236895 B1 EP 1236895B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
casing
oil
piston element
stroke
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
EP20020004697
Other languages
English (en)
French (fr)
Other versions
EP1236895A1 (de
Inventor
Pierluigi Dell'orto
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.)
Dell Orto SpA
Original Assignee
Dell Orto 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 Dell Orto SpA filed Critical Dell Orto SpA
Publication of EP1236895A1 publication Critical patent/EP1236895A1/de
Application granted granted Critical
Publication of EP1236895B1 publication Critical patent/EP1236895B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
    • F04B17/046—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the fluid flowing through the moving part of the motor
    • 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
    • F01M3/00—Lubrication specially adapted for engines with crankcase compression of fuel-air mixture or for other engines in which lubricant is contained in fuel, combustion air, or fuel-air mixture
    • F01M3/02—Lubrication specially adapted for engines with crankcase compression of fuel-air mixture or for other engines in which lubricant is contained in fuel, combustion air, or fuel-air mixture with variable proportion of lubricant to fuel, lubricant to air, or lubricant to fuel-air-mixture
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two

Definitions

  • the present invention concerns an electromagnetically operated pump for the precise and controlled feeding of oil to two-stroke internal-combustion engines.
  • the present invention concerns a pump of this type, with the object to improve its characteristics as far as structural simplicity, and metering precision and easiness are concerned, all being very important in view of the special use for which said pump is intended.
  • the pump according to the invention has the features detailed in the characterising part of claim 1).
  • the pump according to the invention comprises a casing 1, containing a cylinder 2 and a piston element 3, axially movable into the cylinder 2 and crossed by a pipe 4 connected with branches 5 and 6 - for oil inlet and outlet respectively - of the casing 1.
  • a chamber 7 for pumping the oil to be fed delimited by the plane surface 8 of the casing 1, onto which bears the cylinder 2, and by the bottom end 9 of the piston element 3.
  • an electromagnetic coil 10 fed with pulse current in strict correlation with the running of the two-stroke engine to be equipped with the pump.
  • said coil 10 When energized, said coil 10 controls the movements of the piston element 3 towards the chamber 7, against the action of a spring 11 which acts in an opposite sense when the coil 10 is de-energized.
  • Two ball valves 12, 13, are provided in the casing 1 close to the oil pumping chamber 7, the first of said valves cooperating with the bottom end 9 of the piston element 3, in correspondence of the outlet of the pipe 4.
  • the valve 12 when the piston element 3 is moved by the electromagnetic coil 10, the valve 12 is closed while the valve 13 opens; viceversa, the valve 13 closes when the piston element 3 is moved by the spring 11 and while the valve 12 opens.
  • an abutment 14 is formed on the piston element 3, close to the end opposite to the bottom end 9, said abutment 14 being apt to cooperate with the inner surface 15 of a cup 16, apt to stop the cylinder 2 into the casing 1.
  • Said cup 16 bears in fact with its projecting peripheral edge 17 onto said cylinder 2 and is pressed against the same by a stout Belleville spring 18 engaging the plane surface 19 of the casing 1.
  • the stroke of the piston element 3 into the cylinder 2 is thereby limited by the cooperation, on one side, between the abutment 14 and the inner surface 15 of the cup 16, and on the other side, between the bottom end 9 of the piston element 3 and the plane surface 8 of the casing 1.
  • Said stroke determines the capacity (or volume) of the pumping chamber 7 and the metering of the oil to be fed.
  • the figure of the accompanying drawing illustrates the pump according to the invention with the chamber 7 full of oil, the piston element 3 having its bottom end 9 spaced apart from the plane surface 8 of the casing 1 and the abutment 14 in contact with the inner surface 15 of the cup 16.
  • the coil 10 When, in operation, the coil 10 is energized, the piston element 3 moves towards the plane surface 8 compressing the oil into the chamber 7, while the valve 12 closes the pipe 4 into which flows the oil let in through the branch 5.
  • the oil pressure in the chamber 7 opens the valve 13 and the oil is fed through the branch 6 into the engine.
  • the pumping of the oil is carried out by energizing the electromagnetic coil 10.
  • the piston element 3 stops, with the chamber 7 empty, when the bottom element 9 thereof cooperates with the plane surface 8 of the casing 1.
  • the pump described heretofore has a very simple structure and its working is very reliable; but, above all, it can be very easily adapted, at extremely reduced costs, to the most different requirements of capacity: the volume of the oil pumping and metering chamber 7 (namely, the amount of oil being fed at each piston stroke C) can in fact be easily adjusted, not only by acting on the axial position of the abutment 14 of the piston element 3, but also by simply replacing the existing cup 16 with a similar cup in which the projection of its peripheral edge 17 differs from the inner surface 15 thereof, or even by varying with a simple mechanical operation the projection in the cup 16 being used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)
  • Reciprocating Pumps (AREA)
  • External Artificial Organs (AREA)

Claims (1)

  1. Elektromagnetisch betriebene Pumpe zum Zuführen von genauen und gesteuerten Mengen von Öl an Zweitakt-Verbrennungsmotoren, der Bauart, die in einem Gehäuse (1) umfaßt: einen Zylinder (2), ein Kolbenelement (3) mit einer durchgehenden Leitung (4), das axial bewegbar in dem genannten Zylinder (2) ist; eine Pump- und Abmeßkammer (7) für das zuzuführende Öl, an dem unteren Ende (9) des Kolbenelements (3); wobei der Hub des Kolbenelements (3) auf der einen Seite durch eine ebene Oberfläche (8) des Gehäuses (1) entsprechend der genannten Kammer (7) begrenzt ist, und auf der anderen Seite durch ein Lagerelement (15); starke Federmittel (18), die zwischen dem genannten Lagerelement (16) und dem Gehäuse (1) angeordnet sind, um den Zylinder (2) darin festzuhalten; eine elektromagnetische Spule (10) außerhalb des Zylinders (2), um die Bewegungen des Kolbenelements (3) gegen die Wirkung der Federmittel (11) zu kontrollieren, und Ventilmittel (12, 13), die in dem genannten Gehäuse (1) in der Nähe des genannten Endes (9) aufgenommen sind, wobei eines der genannten Ventilmittel (12) mit dem genannten Kolbenelement (3) zusammenwirkt, dadurch gekennzeichnet, daß das genannte Lagerelement (16) in Form eines Bechers (16) ausgebildet ist und eine innere Oberfläche (15) und einen in axialer Richtung vorspringenden, über den Umfang verlaufenden Rand (17) aufweist, wobei die genannte innere Oberfläche (15) einen Endanschlag des Kolbenhubs bildet und der genannte über den Umfang verlaufende Rand (17) auf dem Ende des Zylinders (2) gegenüber von dem der Kammer (7) aufliegt.
EP20020004697 2001-03-01 2002-02-28 Elektromagnetische Pumpe Expired - Lifetime EP1236895B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2001MI000420A ITMI20010420A1 (it) 2001-03-01 2001-03-01 Pompa comandata da elettromagnete
ITMI010420 2001-03-01

Publications (2)

Publication Number Publication Date
EP1236895A1 EP1236895A1 (de) 2002-09-04
EP1236895B1 true EP1236895B1 (de) 2006-06-28

Family

ID=11447070

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020004697 Expired - Lifetime EP1236895B1 (de) 2001-03-01 2002-02-28 Elektromagnetische Pumpe

Country Status (4)

Country Link
EP (1) EP1236895B1 (de)
DE (1) DE60212743T2 (de)
ES (1) ES2266326T3 (de)
IT (1) ITMI20010420A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2874961A1 (fr) * 2004-09-06 2006-03-10 Peugeot Motocycles Sa Systeme de commande du fonctionnement d'une pompe electrique d'huile de lubrification d'un moteur a deux temps
DE102009006630B4 (de) 2009-01-29 2016-12-15 Continental Automotive Gmbh Hochdruckpumpe

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4306842A (en) * 1978-06-28 1981-12-22 Jidosha Kiki Co., Ltd. Electromagnetic pumps
GB8709082D0 (en) * 1987-04-15 1987-05-20 Eaton Sa Monaco Electrical fluid pump
DE4130166C1 (de) * 1991-09-11 1993-03-11 Lang Apparatebau Gmbh, 8227 Siegsdorf, De
IT1299987B1 (it) * 1998-04-27 2000-04-04 Magneti Marelli Spa Pompa volumetrica.

Also Published As

Publication number Publication date
DE60212743D1 (de) 2006-08-10
ITMI20010420A1 (it) 2002-09-01
ES2266326T3 (es) 2007-03-01
DE60212743T2 (de) 2007-06-28
EP1236895A1 (de) 2002-09-04

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