EP2529104B1 - Kraftstoffeinspritzsystem mit integriertem hochdruckspeicher - Google Patents

Kraftstoffeinspritzsystem mit integriertem hochdruckspeicher Download PDF

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Publication number
EP2529104B1
EP2529104B1 EP10800951.5A EP10800951A EP2529104B1 EP 2529104 B1 EP2529104 B1 EP 2529104B1 EP 10800951 A EP10800951 A EP 10800951A EP 2529104 B1 EP2529104 B1 EP 2529104B1
Authority
EP
European Patent Office
Prior art keywords
pressure
distribution element
cylinder head
accumulator
fuel injection
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.)
Active
Application number
EP10800951.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2529104A1 (de
Inventor
Friedrich Boecking
Sakae Sato
Sylvain Besancon
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2529104A1 publication Critical patent/EP2529104A1/de
Application granted granted Critical
Publication of EP2529104B1 publication Critical patent/EP2529104B1/de
Active 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F02M63/0265—Pumps feeding common rails
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/022—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type having an accumulator storing pressurised fuel during pumping stroke of the piston for subsequent delivery to the injector
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/40—Fuel-injection apparatus with fuel accumulators, e.g. a fuel injector having an integrated fuel accumulator

Definitions

  • the invention relates to a fuel injection system of an internal combustion engine with a high-pressure pump and a high-pressure accumulator according to the preamble of claim 1.
  • Such a fuel injection system is known from EP 1 101 931 A2 known.
  • This fuel injection system comprises a high-pressure pump and a high-pressure accumulator, wherein a high-pressure outlet of the high-pressure pump is connected to the high-pressure accumulator, which has at least one accumulator outlet for connection to a fuel injector.
  • the high pressure accumulator is directly adapted to the high pressure pump.
  • the high-pressure pump has a pump housing with a cylinder head, in which a pump piston is guided in a cylinder bore. A high pressure outlet of the cylinder bore opens into a cylinder head wall of the cylinder head.
  • the high-pressure accumulator is designed as a distribution element cooperating with the high-pressure outlet.
  • the distribution element has an alignment device cooperating with the high-pressure outlet or cylinder head, so that the at least one accumulator outlet is aligned in a precisely defined position relative to the high-pressure pump.
  • the high-pressure pump has a plurality of pump elements, each with its own cylinder heads and the Hoch horrspelcher is connected to the cylinder heads.
  • the cylinder heads are surrounded by a common pump housing part to which the high-pressure accumulator is attached.
  • the high pressure accumulator is cuboid and covers the pump housing part and the cylinder heads arranged therein. It is both an attachment of the cylinder heads to the high-pressure accumulator and the attachment the high-pressure accumulator on the pump housing part required, so that the production and assembly of the high-pressure pump with the high-pressure accumulator is very expensive.
  • a similar fuel injection system is in EP 0 881 380 A1 disclosed.
  • This fuel injection system has a high-pressure pump with two pump elements, each having a cylinder head.
  • the two cylinder heads are surrounded by a common pump housing part and are each connected to a high-pressure accumulator.
  • the cylinder-tube high-pressure accumulator is formed either as a separate part which is fixed in unspecified manner, or the high-pressure accumulator is integrally formed on the pump housing part. Also in this fuel injection system either a complex installation of the high-pressure accumulator is required or the pump housing part with the one-piece high-pressure accumulator is very expensive to produce.
  • a fuel injection system which comprises a high pressure pump and a high pressure accumulator.
  • the high pressure accumulator is formed as a cooperating with a high pressure outlet of the high pressure pump distribution element and has a plurality of storage outlets.
  • the high-pressure pump has a pump housing with a cylinder head, in which a pump piston is guided in a cylinder bore.
  • the high-pressure accumulator is accommodated in a pump housing part with which the cylinder head is connected.
  • the connection between the high-pressure outlet of the cylinder head and the high-pressure accumulator runs through the pump housing part, which must therefore have a sufficient high-pressure resistance.
  • this fuel injection system is thus expensive to manufacture and requires high material costs, since the cylinder head, pump housing part and high-pressure accumulator must be made of high pressure resistant material.
  • the invention is based on the object to provide a fuel injection system that is compact, inexpensive to produce and easy to assemble.
  • the distribution element is cylindrical or cup-shaped and is attached to a arranged on the cylinder head wall of the cylinder head pipe.
  • the distribution element with a pot-shaped configuration is particularly suitable because it can be easily manufactured and the cup-shaped interior provides a sufficiently large storage capacity for the high-pressure accumulator.
  • the distribution element can also be designed as a cylindrical tube, in which case the at least one storage output can then be attached laterally to the cylindrical tube-shaped distribution element.
  • the distribution element has one, two, three or four storage outlets.
  • the storage outlets are preferably arranged at an angle deviating from 0 ° relative to the cylinder longitudinal axis thereof. This arrangement allows only the adaptation of more than one memory outlet to the distribution element, but on the other hand makes the exact Ausrich tion of the distribution element necessary to connect the at least one connecting line to the fuel injector without adjustment work can.
  • the distribution element is fastened by means of a holding part on the neck on the cylinder head wall.
  • a holding part the distribution element can be precisely aligned, for example by a corresponding mark (or an alignment device explained below) to the cylinder head and then secured by means of the holding member to the neck of the cylinder head wall.
  • the holding part is a clamping screw which is bolted to the cylinder head wall, for example, with the connecting piece formed as a threaded neck.
  • the clamping screw has a retaining flange which rests on an annular flange of the expelling element.
  • the clamping screw can also be designed as a double-acting screw with a right-hand and a left-hand thread and cooperate with corresponding threads on the cylinder head and the distribution element.
  • the distribution element opposite the connection side on the high-pressure outlet or the cylinder head has a connection opening for a closure cover or a high-pressure accumulator pressure sensor. This embodiment is particularly advantageous to apply when the distribution element is cylindrical tube-shaped.
  • FIG. 1 the high-pressure pump of a fuel injection system of an internal combustion engine to a pump housing with a cylinder head 1, wherein a partially illustrated pump piston 2 is guided in a cylinder bore of the cylinder head 1 and the fuel from a pressure chamber 3 via a high-pressure outlet 4, in which a pressure holding valve 5 is turned on in promotes a high-pressure accumulator 23.
  • the high pressure outlet 4 opens into a cylinder head wall 6 of the cylinder head 1 of the high pressure pump.
  • annular threaded connector 7 is formed, in which a cup-shaped distribution element 8, the interior of which forms the high-pressure accumulator 23, is used.
  • the high-pressure pump may be installed in a cylinder head of the internal combustion engine and then has no own drive shaft but is driven by a shaft of the internal combustion engine, for example, the camshaft.
  • the high-pressure pump may also have its own drive shaft, which is driven by the internal combustion engine.
  • the cup-shaped distribution element 8 has an annular flange 9 on which a corresponding retaining flange 10 of a clamping screw 11 engages.
  • the clamping screw 11 is screwed to the threaded connector 7 and presses the distribution element 8 to the cylinder head wall 6 of the cylinder head 1 of the high-pressure pump.
  • the cup-shaped distribution element 8 has a sealing geometry 12 on the side facing the cylinder head wall 6. Alternatively, a seal is inserted between the corresponding components.
  • two storage outlets 13a, 13b in which lines for connection to fuel injectors can be screwed, are started in the bottom wall by way of example.
  • the number of accumulator outlets 13 (for example two, three or four) depends on the number of cylinders of the internal combustion engine, since each cylinder unit is assigned a fuel injector.
  • the distribution element still has a connection 14, to which a high-pressure accumulator pressure sensor 15 can be connected. With the high-pressure storage pressure sensor, the fuel pressure in the high-pressure accumulator 23 for controlling the amount of fuel to be replenished is determined.
  • FIG. 2 shows the cup-shaped distribution element 8, which is provided with alignment means 16 in the form of three circumferentially distributed lugs. These lugs engage in corresponding recesses in the threaded connector 7 (or vice versa) and ensure accurate alignment of the distribution element 8 to the cylinder head wall 6.
  • the number of lobes preferably corresponds to the number of storage outlets 13 to ensure accurate allocation and alignment.
  • two storage outlets 13 as well as the lugs are arranged opposite one another (180 °), while three storage outlets, as well as the lugs, are arranged at 120 ° and four storage outlets are rotated by 90 ° relative to one another.
  • the threaded connector 7a is integrated directly into the cylinder head 1 and the clamping screw 11a is designed as a double-acting screw with a right-hand and a left-hand thread.
  • the distribution element 8a here also has an external thread 17, such that when the tensioning screw 11a is screwed together, the distribution element 8a is bolted to the threaded connector 7a.
  • the further embodiment of the distribution element 8a is analogous to the FIG. 1 ,
  • FIG. 4 is the distribution element 8b cylindrical tube-shaped and screwed with a nozzle 18 which cooperates with the cylinder head wall 6 by means of a clamping screw 11 b.
  • the nozzle 18 corresponds functionally to the threaded connector 7, 7a.
  • the clamping screw 11b is supported on a clamping ring 19, which is inserted into a circumferential groove of the nozzle 18, and at the same time screwed into an internal thread of the distribution element 8b.
  • An alignment device, not shown, and a sealing geometry are provided between the nozzle 18 and the distribution element 8b.
  • a closure lid 21 is screwed into a connection opening 20 of the distribution element 8b.
  • the high-pressure accumulator can also be screwed in here.
  • the closure cover 21 screwed into the connection opening 20 has a recess 22 which causes a radial pressure to be exerted on the screw connection by the fuel pressure acting within the recess 22. This compensates for any expansion of the distribution element 8b and thus increases the effectiveness of the seal.
  • FIG. 5 shows in a cross-sectional view of the distribution element 8b with, for example, two memory outlets 13a, 13b and another terminal 14 for the rail pressure sensor.
  • the number of actual accumulator outlets 13 (for example two, three or four) depends on the number of cylinders of the internal combustion engine, since each cylinder unit is assigned a fuel injector.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP10800951.5A 2010-01-27 2010-12-29 Kraftstoffeinspritzsystem mit integriertem hochdruckspeicher Active EP2529104B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010001252A DE102010001252A1 (de) 2010-01-27 2010-01-27 Kraftstoffeinspritzsystem mit integriertem Hochdruckspeicher an einem Zylinderkopf
PCT/EP2010/070871 WO2011091937A1 (de) 2010-01-27 2010-12-29 Kraftstoffeinspritzsystem mit integriertem hochdruckspeicher

Publications (2)

Publication Number Publication Date
EP2529104A1 EP2529104A1 (de) 2012-12-05
EP2529104B1 true EP2529104B1 (de) 2014-08-06

Family

ID=43797069

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10800951.5A Active EP2529104B1 (de) 2010-01-27 2010-12-29 Kraftstoffeinspritzsystem mit integriertem hochdruckspeicher

Country Status (8)

Country Link
US (1) US9068543B2 (ru)
EP (1) EP2529104B1 (ru)
JP (1) JP5491643B2 (ru)
KR (1) KR101835894B1 (ru)
CN (1) CN102770659B (ru)
DE (1) DE102010001252A1 (ru)
RU (1) RU2568024C2 (ru)
WO (1) WO2011091937A1 (ru)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10041435B2 (en) * 2014-12-16 2018-08-07 Fca Us Llc Direct injection fuel system with controlled accumulator energy storage and delivery
US9593653B2 (en) * 2015-01-21 2017-03-14 Ford Global Technologies, Llc Direct injection fuel pump system

Family Cites Families (32)

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DE1903305B2 (de) * 1969-01-23 1977-09-15 Vickers Gmbh, 6380 Bad Homburg Mengenregler in form eines dreiwegeventils
BE791450A (fr) * 1971-11-18 1973-03-16 Fitzgerald William M B Generateur de puissance
DE2303076A1 (de) 1972-05-24 1973-12-13 Iomec Verfahren und vorrichtung fuer die format-einteilung von sektoren und fuer die adressierung von datensaetzen bei speicherplatten-kassetten
JPS4943618U (ru) * 1972-07-25 1974-04-17
US3918851A (en) * 1972-11-10 1975-11-11 William Maurice Bar Fitzgerald High velocity shaft seal
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JPS50114519A (ru) 1974-02-25 1975-09-08
JPS5417696Y2 (ru) * 1974-02-28 1979-07-06
JPS5417696A (en) 1977-07-08 1979-02-09 Maekawa Seisakusho Kk Moving article position indicator in sealed container
US4275693A (en) * 1977-12-21 1981-06-30 Leckie William H Fuel injection timing and control apparatus
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Also Published As

Publication number Publication date
RU2568024C2 (ru) 2015-11-10
JP2013518209A (ja) 2013-05-20
RU2012136542A (ru) 2014-03-10
DE102010001252A1 (de) 2011-07-28
CN102770659B (zh) 2015-05-20
US9068543B2 (en) 2015-06-30
US20120279473A1 (en) 2012-11-08
KR20120112655A (ko) 2012-10-11
JP5491643B2 (ja) 2014-05-14
CN102770659A (zh) 2012-11-07
EP2529104A1 (de) 2012-12-05
KR101835894B1 (ko) 2018-03-07
WO2011091937A1 (de) 2011-08-04

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