EP0617200B1 - Kolbenpumpe zur Zuführung von Gasöl zu Dieselmotoren - Google Patents

Kolbenpumpe zur Zuführung von Gasöl zu Dieselmotoren Download PDF

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Publication number
EP0617200B1
EP0617200B1 EP94104394A EP94104394A EP0617200B1 EP 0617200 B1 EP0617200 B1 EP 0617200B1 EP 94104394 A EP94104394 A EP 94104394A EP 94104394 A EP94104394 A EP 94104394A EP 0617200 B1 EP0617200 B1 EP 0617200B1
Authority
EP
European Patent Office
Prior art keywords
piston
gas oil
pump
chamber
inlet
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
EP94104394A
Other languages
English (en)
French (fr)
Other versions
EP0617200A1 (de
Inventor
Lucio Bugatti
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.)
OMB Srl
Original Assignee
OMB Srl
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Filing date
Publication date
Application filed by OMB Srl filed Critical OMB Srl
Publication of EP0617200A1 publication Critical patent/EP0617200A1/de
Application granted granted Critical
Publication of EP0617200B1 publication Critical patent/EP0617200B1/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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/12—Valves; Arrangement of valves arranged in or on pistons
    • F04B53/125—Reciprocating valves
    • F04B53/127—Disc valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/043—Arrangements for driving reciprocating piston-type pumps
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F04B53/144—Adaptation of piston-rods
    • F04B53/147—Mounting or detaching of piston rod
    • 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
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

Definitions

  • This invention relates to a piston pump for feeding gas oil to Diesel engines of motor-cars in general.
  • this invention relates to a piston pump utilizable at a delivery pressure from 0,5 to 6 bars and capable of replacing both the present membrane pumps provided for low and middle-powered Diesel engines (up to about 13,000 cm3) and the present piston pumps installed on high-powered Diesel engines (over 13,000 cm3).
  • EP-A-00277/7 discloses a piston pump for feeding fuel internal combustion engines including the features defined in the preamble of claim 1.
  • a further drawback is due to the fact that the membrane of the pump is directly in touch with the engine oil, even though in some applications it has been tried to utilize a rubber protection gasket. Such direct touch with the engine oil may actually cause several breakdowns in the pump, with the ensuing stanstill of the machine. A typical case is the breaking of the membrane due to an excessive increase in the oil pressure in the sump.
  • Another drawback is the loss of engine oil from the membrane breather, if the pump is provided with a gasket on the stem.
  • the object of this invention is to solve all of these drawbacks. More particularly, the object of this invention is to provide a piston pump for feeding gas oil to Diesel engines, such as to allow to correct and overcome the limits of present pumps, independently on whether they are membrane or piston pumps.
  • the piston pump for feeding gas oil to Diesel engines of the present invention comprises: a pump casing, containing the cylinder in which the piston slides, which provides for the external connections through a fuel outlet union, and in some cases also an inlet fuel union, and the seat for the priming hand pump; a pump lid which may or may not have the fuel intake union and the seat for the priming hand pump; a control bar which transforms the rotatory motion of the engine cam into a rectlinear motion, transmitting it to the piston in the pump casing cylinder; a piston which slides within the cylinder and which receives the motion from the control bar, being in thiw ways pushed upwards, and which comprises holes which allow fuel to pass in both directions; two fuel inlet and outlet valves which allow fuel to pass in one only direction; a pressure spring which pushes back the piston, once it is driven by the control bar, to the starting position; and a damp
  • the pump subject matter of this invention shown in a version without priming hand pump and in the stages of fuel end intake and exhaust, is essentially constituted by:
  • valve (5a) closes and at the same time valve (5b) opens, causing a reduction in the volume of said chamber (22), through holes (26) of piston (4).
  • the fuel contained in said chamber (24) is therefore exhausted through the outlet union (25) during the already described following intake stage.
  • Damper (7) being made from plastic material, allows to obtain a noiseless contact between piston (4) and control bar (3).
  • Such variant provides for the presence of a priming hand pump (20), fastened to lid (2) parallelly to the control bar (3)/piston (4) system, and is shown both during the end intake and exhaust stages and during the compression or transfer stage.
  • Said priming pump (20) is an accessory utilized in the most various pumps, even though in some cases, as for the pump described above, it may be omitted, as the engine is already provided with one such pump in other parts of the feeding plant.
  • It comprises a hand-piston (9), with a return spring (10), a lid (11) and an O-ring gasket (12) and a lip-kasket (13), also from NBR or SBR rubber which encure the tightness between said piston and said lid.
  • Such variant is different from the preceding one in that the two inlet (5a) and outlet (5b) valves are not arranged on the same axis, but on axes that are parallel to one another, and in that the priming hand pump (20) is inserted on the pump casing, orthogonally to the control bar(3)/piston (4) system.
  • the pump can be much shorter than the pumps of the solutions described above, while keeping the same performances, and allow the interchangeability with the piston versions known to prior art, but with a greater adaptability to the sizes of the engine pieces.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • High-Pressure Fuel Injection Pump Control (AREA)

Claims (8)

  1. Kolbenpumpe zum Liefern von Kraftstoff an Dieselmotoren bei Kraftfahrzeugen im allgemeinen, umfassend:
    - ein Pumpengehäuse (1), das durch eine Befestigungseinrichtung (27) an dem Motor (29) befestigt wird und einen Zylinder umfaßt,
    - einen Kolben (4), der in den Zylinder gleitet und den Zylinder in zwei Kammern unterteilt, eine erste obere Kammer (22) und eine zweite untere Kammer (24); wobei der Kolben (4) mit mindestens zwei Löchern (26) für die Überleitung des Kraftstoffs von der ersten Kammer (22) an die zweite Kammer (24) versehen ist;
    - einen ersten Einlaßanschluß (23) zum Einlaß des Kraftstoffs aus einem Tank;
    - einen zweiten Auslaßanschluß (25) für die Abgabe des Kraftstoffs von der zweiten Kammer (24) an den Motor;
    - eine Steuerstange (3), die in dem Pumpengehäuse (1) gleitet, zwischen einer Motornocke und dem Kolben (4) angeordnet ist und die Drehbewegung der Nocke in eine geradlinige Bewegung des Kolbens (4) überführt;
    - ein erstes Einlaßventil (5a), das den Kraftstoffeinlaß von dem Einlaßanschluß (23) in die erste Kammer (22) ermöglicht;
    - ein zweites Auslaßventil (5b), das mit dem Kolben (4) verbunden ist, um den Kraftstoffauslaß von der ersten Kammer (22) zu ermöglichen, wobei der Raum der ersten Kammer (22) zwischen dem ersten Ventil (5a) und dem zweiten Ventil (5b) vorgesehen ist, und
    - eine Druckfeder (6), die zwischen dem ersten Ventil (5a) und dem zweiten Ventil (5b) angeordnet ist, und auf die Ventile (5a,5b) drückt und deshalb auf den Kolben (4),
    dadurch gekennzeichnet,
    daß ein Dämpfer (7) zwischen dem Kolben (4) und der Steuerstange (3) angeordnet ist, wobei der Dämpfer (7) an dem Ende (3') der Steuerstange (3) befestigt und mit einem Flansch (7') versehen ist.
  2. Kolbenpumpe nach Anspruch 1,
    dadurch gekennzeichnet,
    daß das erste Einlaßventil (5a) und das zweite Auslaßventil (5b) auf derselben Achse angeordnet sind.
  3. Kolbenpumpe nach Anspruch 1 oder 2,
    dadurch gekennzeichnet,
    daß der erste Einlaßanschluß (23) auf einem Deckel (2) des Pumpengehäuses (1) angebracht ist.
  4. Kolbenpumpe nach irgendeinem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet,
    daß sie eine Einspritzhandpumpe (20) umfaßt, die parallel zu der Steuerstange (3) und dem Kolben (4) angeordnet ist.
  5. Kolbenpumpe nach Anspruch 1,
    dadurch gekennzeichnet,
    daß das erste Einlaßventil (5a) und das zweite Auslaßventil (5b) parallel zueinander angeordnet sind.
  6. Kolbenpumpe nach Anspruch 5,
    dadurch gekennzeichnet,
    daß eine Einspritzhandpumpe (20) orthogonal zur Steuerstange (3) und dem Kolben (4) angeordnet ist.
  7. Kolbenpumpe nach irgendeinem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet,
    daß der Dämpfer (7) aus Kunststoffmaterial besteht.
  8. Gebrauch der Kolbenpumpe nach irgendeinem der vorhergehenden Ansprüche zum Liefern von Biodiesel und arktischem Dieselkraftstoff.
EP94104394A 1993-03-24 1994-03-21 Kolbenpumpe zur Zuführung von Gasöl zu Dieselmotoren Expired - Lifetime EP0617200B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI930569 1993-03-24
ITMI930569A IT1270970B (it) 1993-03-24 1993-03-24 Pompa a pistone per l'alimentazione di carburante gasolio ai motori disel di autoveicoli in generale.

Publications (2)

Publication Number Publication Date
EP0617200A1 EP0617200A1 (de) 1994-09-28
EP0617200B1 true EP0617200B1 (de) 1997-10-01

Family

ID=11365486

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94104394A Expired - Lifetime EP0617200B1 (de) 1993-03-24 1994-03-21 Kolbenpumpe zur Zuführung von Gasöl zu Dieselmotoren

Country Status (4)

Country Link
EP (1) EP0617200B1 (de)
AT (1) ATE158846T1 (de)
DE (1) DE69405895D1 (de)
IT (1) IT1270970B (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19918122A1 (de) * 1999-04-22 2000-11-23 Bosch Gmbh Robert Kolbenpumpe

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2185145A (en) * 1937-06-03 1939-12-26 Timken Roller Bearing Co Fuel pump
US2290829A (en) * 1939-09-29 1942-07-21 Timken Roller Bearing Co Fuel pump
WO1981001176A1 (en) * 1979-10-18 1981-04-30 Caterpillar Tractor Co Single acting piston pump

Also Published As

Publication number Publication date
ITMI930569A0 (it) 1993-03-24
EP0617200A1 (de) 1994-09-28
ATE158846T1 (de) 1997-10-15
ITMI930569A1 (it) 1994-09-24
DE69405895D1 (de) 1997-11-06
IT1270970B (it) 1997-05-26

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