EP0307637A1 - Commande de soupape pour moteur à combustion interne par pompe à piston rotatif à entraînement excentré - Google Patents

Commande de soupape pour moteur à combustion interne par pompe à piston rotatif à entraînement excentré Download PDF

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Publication number
EP0307637A1
EP0307637A1 EP88113278A EP88113278A EP0307637A1 EP 0307637 A1 EP0307637 A1 EP 0307637A1 EP 88113278 A EP88113278 A EP 88113278A EP 88113278 A EP88113278 A EP 88113278A EP 0307637 A1 EP0307637 A1 EP 0307637A1
Authority
EP
European Patent Office
Prior art keywords
valve
rotary
piston pump
outlets
pump
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.)
Withdrawn
Application number
EP88113278A
Other languages
German (de)
English (en)
Inventor
Ewald Dipl.-Ing. Junghans
Gabriel Tittizer
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.)
Interatom Internationale Atomreaktorbau GmbH
Original Assignee
Interatom Internationale Atomreaktorbau GmbH
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 Interatom Internationale Atomreaktorbau GmbH filed Critical Interatom Internationale Atomreaktorbau GmbH
Publication of EP0307637A1 publication Critical patent/EP0307637A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/06—Control
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/24—Bypassing

Definitions

  • the present invention relates to a rotary piston pump according to the preamble of claim 1 and its use for controlling the valves of an internal combustion engine.
  • a device for valve control controlled by means of a rotary slide valve is known, in which the characteristics of hydraulically actuated valves which are acted upon from a central pressure source are changed in that two sets of rotatable links act as a function of different operating parameters the machine variable passage for the hydraulic fluid is created. Because of the different viscosity of the hydraulic fluid at the different operating temperatures of the machine, an exact valve control cannot be achieved with a device of this type.
  • the object of the present invention is a rotary piston pump with a characteristic adapted to this need, which acts only intermittently on the valves and works both as a pressure and as a suction pump, these work cycles each being assigned to one of the valve movements, the opening or the closing.
  • the valve control should take place within a closed circuit which is independent of the lubricating oil circuit of the machine, so that the most suitable fluid can be used for both purposes.
  • the second claim describes the preferred use of the pump according to the invention, which is made possible by its intermittent and alternating effect in one direction or the other.
  • the period of use during which the pump does not deliver externally corresponds to the period of time during which the controlled valve remains closed.
  • the embodiment according to claim 4 allows the closing movement of the valve to be accomplished without the aid of springs due to the suction effect of the pump, which means that when the valve is opened it is not just the force of the same Springs must be overcome.
  • the pump acts as a pressure pump as long as the piston is moved radially outwards by the action of the eccentric and as a suction pump as soon as this movement is reversed.
  • the opening and closing of the first outlets takes place by means of a rotary slide valve, which is preferably fastened on the pump shaft itself in accordance with the proposal made in claim 7.
  • the characteristic of the rotary valve can be changed, so that the duration of the periods during which the first outlets are closed or opened also changes, so that the period during which the valves are opened or closed also changes accordingly.
  • Eccentrics 2 are formed on a driven shaft 1 and perform a reciprocating wobble movement during one revolution of the shaft 1. Conveyed by roller bearings 3, this movement is communicated to pistons 4, which are displaceable in correspondingly radially arranged cylinder spaces 6 in a pump housing 5.
  • the empty spaces of the housing 5 are filled with a hydraulic fluid, so that when the pistons 4 move radially outward, this is displaced into a respective channel 7 which bifurcates into first outlets 8 and second outlets 9.
  • the first outlets 8 open out on the circumference of a rotary slide valve 10, which is provided on a part of this circumference with recesses 11, from which further channels 12 extend back into the interior of the housing 5.
  • the first outlets 8 are located on the circumference of the rotary valve opposite one of the recesses 11, the hydraulic fluid conveyed by the piston 4 is conveyed back via the further channels 12 into the housing 5, where it fills exactly the space that was released by the outward movement of the piston 4. There is no external pumping action. If, on the other hand, the first outlets lie opposite those parts of the circumference of the rotary slide valve 10 which are not taken up by the recesses 11, the latter are blocked and the pumped fluid is conveyed through the second outlets 9 into the interior of an actuating cylinder 13 in which the shaft designed as a piston of a valve 14 is moved so that the valve 14 opens.
  • the rotary slide is longitudinally displaceable and its dimensions have an axially different profile, so that changing parts of the circumference are taken up by the same.
  • the time period can be varied during which the first outlets 8 remain open and no pumping action is exerted on the actuating cylinder 13; the duration of the time during which the valve 14 remains closed can be varied accordingly.
  • the circuit in question is equipped with a check valve 15 pressurized source 16 connected to additional hydraulic fluids.
  • the shaft 1 is expediently driven from the crankshaft thereof in any of the ways known to the person skilled in the art, as described, for example, in FIG. B. have been developed for driving camshafts.
  • one of the two eccentrics 2 will control an inlet valve and the other of these will control an outlet valve.
  • each eccentric 2 is assigned a corresponding number of pistons 4 distributed over the circumference, so that the valves of the respective group are actuated one after the other in the desired sequence.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Rotary Pumps (AREA)
  • Valve Device For Special Equipments (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)
EP88113278A 1987-08-26 1988-08-16 Commande de soupape pour moteur à combustion interne par pompe à piston rotatif à entraînement excentré Withdrawn EP0307637A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3728511 1987-08-26
DE3728511 1987-08-26

Publications (1)

Publication Number Publication Date
EP0307637A1 true EP0307637A1 (fr) 1989-03-22

Family

ID=6334550

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88113278A Withdrawn EP0307637A1 (fr) 1987-08-26 1988-08-16 Commande de soupape pour moteur à combustion interne par pompe à piston rotatif à entraînement excentré

Country Status (7)

Country Link
US (1) US4898129A (fr)
EP (1) EP0307637A1 (fr)
JP (1) JPS6469708A (fr)
KR (1) KR890004080A (fr)
CN (1) CN1031582A (fr)
BR (1) BR8804346A (fr)
DE (1) DE8717455U1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5125372A (en) * 1990-03-23 1992-06-30 Gondek John T Hydraulically operated engine valve system
US5090366A (en) * 1990-03-23 1992-02-25 Gondek John T Hydraulically operated engine valve system
JPH06272522A (ja) * 1993-01-21 1994-09-27 Nippon Soken Inc 弁駆動装置
US5582818A (en) * 1994-01-27 1996-12-10 Ajinomoto Co., Inc. Ultraviolet screening powder and cosmetics
JPH10176654A (ja) * 1996-12-16 1998-06-30 Unisia Jecs Corp ポンプ装置
GB0504058D0 (en) * 2005-02-26 2005-04-06 Stein U B P Valvetrain control by digital displacement
CN108644094B (zh) * 2018-07-11 2023-10-03 珠海格力节能环保制冷技术研究中心有限公司 活塞压缩机曲轴、活塞压缩机及制冷系统
CN113202726B (zh) * 2021-06-11 2022-04-22 李建云 一种间歇性调节装置及阀门控制系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2306131A (en) * 1940-01-29 1942-12-22 Lossau Earl Hydraulic valve lifting mechanism
FR1506443A (fr) * 1966-10-26 1967-12-22 Hispano Suiza Lallemant Soc Perfectionnements apportés aux pompes à pistons du type à barillet, notamment auxpompes hydrauliques de ce genre
US3682565A (en) * 1970-08-31 1972-08-08 Donald L Yarger Multiple piston pump apparatus
FR2480853A1 (fr) * 1980-04-22 1981-10-23 Renault Commande hydraulique de soupapes de moteur a combustion interne

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4258672A (en) * 1978-10-20 1981-03-31 Hietikko Calvin N Variable lift camming apparatus and methods of constructing and utilizing same
DE3010839A1 (de) * 1980-03-21 1981-10-01 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzpumpe
DE3017276A1 (de) * 1980-05-06 1981-11-12 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzpumpe fuer brennkraftmaschinen
DE3243348A1 (de) * 1982-11-24 1984-05-24 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzpumpe
DE3342993A1 (de) * 1982-12-06 1984-06-07 Nissan Motor Co., Ltd., Yokohama, Kanagawa Steuereinrichtung fuer die treibstoffeinspritzmenge bei einem verbrennungsmotor
US4644924A (en) * 1984-10-09 1987-02-24 Stanadyne, Inc. Fuel injection pump with spill control mechanism

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2306131A (en) * 1940-01-29 1942-12-22 Lossau Earl Hydraulic valve lifting mechanism
FR1506443A (fr) * 1966-10-26 1967-12-22 Hispano Suiza Lallemant Soc Perfectionnements apportés aux pompes à pistons du type à barillet, notamment auxpompes hydrauliques de ce genre
US3682565A (en) * 1970-08-31 1972-08-08 Donald L Yarger Multiple piston pump apparatus
FR2480853A1 (fr) * 1980-04-22 1981-10-23 Renault Commande hydraulique de soupapes de moteur a combustion interne

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 10, Nr. 163 (M-487)[2219], 11. Juni 1986, Seite 112 M 487; & JP-A-61 16 216 (HONDA GIKEN KOGYO K.K.) 24-01-1986 *

Also Published As

Publication number Publication date
US4898129A (en) 1990-02-06
BR8804346A (pt) 1989-03-21
CN1031582A (zh) 1989-03-08
JPS6469708A (en) 1989-03-15
DE8717455U1 (fr) 1989-01-05
KR890004080A (ko) 1989-04-19

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