EP0533962A1 - Moteur à combustion interne avec système d'injection - Google Patents

Moteur à combustion interne avec système d'injection Download PDF

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Publication number
EP0533962A1
EP0533962A1 EP91114136A EP91114136A EP0533962A1 EP 0533962 A1 EP0533962 A1 EP 0533962A1 EP 91114136 A EP91114136 A EP 91114136A EP 91114136 A EP91114136 A EP 91114136A EP 0533962 A1 EP0533962 A1 EP 0533962A1
Authority
EP
European Patent Office
Prior art keywords
combustion engine
internal combustion
pump
pressure piece
engine according
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
EP91114136A
Other languages
German (de)
English (en)
Other versions
EP0533962B1 (fr
Inventor
Siegfried Dipl.-Ing. Glaeske
Claus Kühl
Reinhard Dipl.-Ing. Häfner
Hans Dipl.-Ing. Heinsohn
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.)
Caterpillar Motoren GmbH and Co KG
Original Assignee
Krupp Mak Maschinenbau 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 Krupp Mak Maschinenbau GmbH filed Critical Krupp Mak Maschinenbau GmbH
Publication of EP0533962A1 publication Critical patent/EP0533962A1/fr
Application granted granted Critical
Publication of EP0533962B1 publication Critical patent/EP0533962B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004—Joints; Sealings
    • F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors

Definitions

  • the invention relates to an internal combustion engine with an injection system according to the preamble of claim 1.
  • Cylinder heads are known from US Pat. No. 3,845,748, in which the fuel supply to the injection valve takes place via a line led through the cylinder head, which is arranged in a pipe casing and is clamped to the injection valve by means of a pressure screw.
  • a conical tip of the pipe end is received by a corresponding opening in the valve body.
  • the other end of the line is connected to an injection pump, which is arranged approximately parallel to the valve.
  • a connecting line between an injection valve and an injection pump is known, which consists of a tube and a subsequent line, which are clamped together. Due to the position of the injection pump to the valve, the exposed line coming from the pump is bent at right angles. Due to their low elasticity, these types of lines have the disadvantage that vibrations can often damage the pump or the valve, or the relatively free movement of the line means that a tight connection u # in the connection area of the line to the pipe is not completely guaranteed.
  • the object of the invention is to provide a fuel line between an injection valve and an injection pump that bridges deviations of the various connection points during assembly and allows elastic movements between the injection pump and cylinder head within limits, without leaks occurring between the lines and to the injection nozzle and the pump .
  • the fuel line comprises straight line parts which form tensionable pressure pieces and connect the injection pump to the injection valve.
  • the pipelines are tightly connected to the units and to one another in a structurally simple manner via a central clamping bolt in a receptacle housing on the cylinder head.
  • the cylinder head takes over the introduction of force for connecting the lines to one another and to the injection valve and to the injection pump.
  • Tolerance differences can be easily accommodated in the vertical and transverse directions by sliding on the flat sealing surfaces. Even in the transverse direction, an adjustment of these surfaces is easily possible on the injection valve, even by turning it slightly.
  • the tolerance compensation in the transverse direction with regard to the meeting of the radial pressure piece and the cross pressure piece is achieved in that, in addition to the exact dimensional adjustment, both the adapter surface on the cross pressure piece is made very elastic, and the diameter design of the radial pressure piece outside the guide in the cylinder head in its cylindrical part towards the cross pressure piece is very great is designed to be elastic.
  • the shape of the cylindrical receptacle housing preferably cast on to the cylinder head, is designed such that it when the radial pressure piece grows under the heat of the heavy oil compared to the colder cylinder head as a tubular spring.
  • the pump-side receiving housing which holds the transverse pressure piece clamped, is designed as a tubular spring.
  • the pressure and tension screws can also be shaped with spring properties, such as, for example, by plate springs.
  • An internal combustion engine comprises a cylinder head 1 with an integrated injection system, which essentially comprises an injection valve 2 and an injection pump 3. This is arranged immediately adjacent to a receiving housing 4 cast onto the cylinder head 1, which has a receiving channel 5 for a line 7 leading to the pump 3 and consisting of a transverse pressure piece 6 and is held in a pre-tensioned manner in a pump housing 3a, 3b by means of a clamping screw 8.
  • This cross-pressure piece 6 is used to connect another line 10, which leads to the injection valve 2 and consists of a radial pressure piece 9, in the meeting corner area 11 of the two lines 7 and 10 and is clamped together in a liquid-tight manner by means of the tensioning screw 8.
  • the pressure pieces 6 and 9 are arranged at right angles to one another, the radial pressure piece 9 being guided in a bore 12 in the cylinder head 1 up to the injection valve 2. It opens with its free end 13 facing away from the valve 2 into the cast-on housing 4.
  • the transverse pressure piece 6 extends as far as the pump housing 3a, 3b, in that its free end 13a is clamped against a pump element 16 by means of a pressure screw 15 .
  • the receiving housing 4 is connected to the pump housing 3a, 3b via a sliding sleeve 17, through which the transverse pressure piece 6 also runs encapsulated.
  • the radial thrust piece 9 has circumferentially spaced circumferential rings 18 which position it exactly in the bore 12, the precise position of the thrust pieces 6 via the tension screw 8 arranged coaxially with this thrust piece 9 in cooperation with the pressure screw 15 in the pump housing 3a, 3b , 9 is set at right angles to each other.
  • the line connection is made via flat sealing surfaces 19, 20, which are each aligned parallel to one another, e.g. is shown in more detail in Fig. 4.
  • the sealing surfaces 21, 22 between the injection valve 2 and the radial pressure piece 9 and the sealing surfaces 23, 24 between the cross pressure piece 6 and the pump 3 are formed.
  • the receptacle housing 4 and the pump housing 3b form so-called tubular springs which, due to their defined configuration as tubular elements in cross section, are elastically flexible within certain limits, in particular when the radial pressure piece 9 or the transverse pressure piece 6 is elongated.
  • the lines 7 and 10 formed from the pressure pieces 6 and 9 are encapsulated by the pump 3 to the injection valve 2 either via the housing 3a, 3b, 4 and via the sliding sleeve 17 and via the bore 12 in the cylinder head 1, so that an exit from Medium is prevented from the outside.
  • tensioning or pressure screws 8 and 15 tension the pressure pieces 6 and 9 over flat end faces 25, 26.
  • ball elements which are not shown in more detail, can also be arranged in the end face of the screws 8 and 15, which are then directed towards the pressure pieces 6 and 9.
  • connection of the transverse pressure piece 6 to the injection pump 3 can, as shown in FIGS. 2 and 3, be selected in various forms.
  • a flat high-pressure seal is preferably also used here, but a hardened cone connection (cone 16a) is also conceivable.
  • the housing 3a is preferably designed as a tubular spring. However, it can also get the pressure screw 15 assigned elastic properties.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP19910114136 1990-05-19 1991-08-23 Moteur à combustion interne avec système d'injection Expired - Lifetime EP0533962B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19904016190 DE4016190C2 (de) 1990-05-19 1990-05-19 Brennkraftmaschine mit einem Einspritzsystem

Publications (2)

Publication Number Publication Date
EP0533962A1 true EP0533962A1 (fr) 1993-03-31
EP0533962B1 EP0533962B1 (fr) 1994-04-06

Family

ID=6406806

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910114136 Expired - Lifetime EP0533962B1 (fr) 1990-05-19 1991-08-23 Moteur à combustion interne avec système d'injection

Country Status (3)

Country Link
EP (1) EP0533962B1 (fr)
DE (1) DE4016190C2 (fr)
DK (1) DK0533962T3 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1937444B2 (de) * 1969-07-23 1973-08-23 Mtu Friedrichshafen Gmbh Durch steckverbindungen herstellbare kraftstoffleitungsanschluesse an einer fuer jeden zylinder einer brennkraftmaschine vorgesehenen pumpendueseneinheit
DE3309854A1 (de) * 1982-04-19 1983-10-27 Yanmar Diesel Engine Co., Ltd., Osaka Haltevorrichtung fuer das kraftstoffeinspritzventil eines dieselmotors
DE3821826A1 (de) * 1987-06-29 1989-01-26 Usui Kokusai Sangyo Kk Anordnung zum verbinden einer abzweigleitung in einem hochdruck-kraftstoffverteiler
DE4030486A1 (de) * 1989-09-27 1991-04-11 Usui Kokusai Sangyo Kk Verbindungsausfuehrung fuer abzweigverbinder in einer hochdruck-kraftstoffschiene

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845748A (en) * 1972-09-29 1974-11-05 Mack Trucks Fuel injection nozzle holder installation
DE3128523A1 (de) * 1981-07-18 1983-02-03 Motoren-Werke Mannheim AG vorm. Benz Abt. stationärer Motorenbau, 6800 Mannheim Zylinderkopf fuer einen verbrennungsmotor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1937444B2 (de) * 1969-07-23 1973-08-23 Mtu Friedrichshafen Gmbh Durch steckverbindungen herstellbare kraftstoffleitungsanschluesse an einer fuer jeden zylinder einer brennkraftmaschine vorgesehenen pumpendueseneinheit
DE3309854A1 (de) * 1982-04-19 1983-10-27 Yanmar Diesel Engine Co., Ltd., Osaka Haltevorrichtung fuer das kraftstoffeinspritzventil eines dieselmotors
DE3821826A1 (de) * 1987-06-29 1989-01-26 Usui Kokusai Sangyo Kk Anordnung zum verbinden einer abzweigleitung in einem hochdruck-kraftstoffverteiler
DE4030486A1 (de) * 1989-09-27 1991-04-11 Usui Kokusai Sangyo Kk Verbindungsausfuehrung fuer abzweigverbinder in einer hochdruck-kraftstoffschiene

Also Published As

Publication number Publication date
EP0533962B1 (fr) 1994-04-06
DE4016190A1 (de) 1991-11-21
DE4016190C2 (de) 1998-08-13
DK0533962T3 (da) 1994-08-22

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