EP2549094A2 - Einspritzventil für Verbrennungsmotoren - Google Patents

Einspritzventil für Verbrennungsmotoren Download PDF

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Publication number
EP2549094A2
EP2549094A2 EP12176384A EP12176384A EP2549094A2 EP 2549094 A2 EP2549094 A2 EP 2549094A2 EP 12176384 A EP12176384 A EP 12176384A EP 12176384 A EP12176384 A EP 12176384A EP 2549094 A2 EP2549094 A2 EP 2549094A2
Authority
EP
European Patent Office
Prior art keywords
filter
injection valve
fuel
region
embodied
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Withdrawn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
EP12176384A
Other languages
English (en)
French (fr)
Other versions
EP2549094A3 (de
Inventor
Alp Durus
Dogan Vardar
Duygu Kandemir
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
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2549094A2 publication Critical patent/EP2549094A2/de
Publication of EP2549094A3 publication Critical patent/EP2549094A3/de
Withdrawn legal-status Critical Current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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/165—Filtering elements specially adapted in fuel inlets to 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
    • F02M2200/27—Fuel-injection apparatus with filters

Definitions

  • the present invention relates to an injection valve for internal combustion engines, which essentially comprises a valve body; an input region existing in said body, through which the fuel enters; a filter housing which is provided inside said body in order for the fuel to be cleaned at said input region; a filter which is connected into the filter housing.
  • Said injection valves essentially comprise a valve body; and a valve member which is axially movable so as to function as a piston inside said body.
  • said valve member (it is called needle in the related technical field) sprays fuel to the combustion chamber of the engine.
  • the fuel which arrives at the injection valve from the fuel depot of the vehicle, comprises particles with several sizes and shapes. When these particles are sprayed to the combustion chamber, the performance of the vehicle decreases, and besides, these particles give harm to the parts during the passage thereof through the injection valve and after certain duration, the injection valve becomes useless.
  • pluralities of filter applications are improved inside the injection valve.
  • filters, which function according to the breaking principle, and filters, which function according to the filtering principle are the filter types used in particle filtering process.
  • the filters which function according to the breaking principle, are embodied in a cylindrical manner.
  • This filter system is disclosed in the patent application DE 2009 029 312 A1 and some improvements are realized.
  • the particles inside the fuel, which pass through these channels with a high pressure, are fragmented because of mechanical friction, abrasion and thermal effects and as a result, cleaned fuel is sprayed to the combustion chamber by the needle.
  • the vibration existing in the engine, helps the filtering process.
  • Such filters are connected in a snap-fit manner to the filter housing, embodied inside the injection valve, by nailing process.
  • Another filter system is disclosed in the patent application DE 102 20 632 A1 in the most general form thereof and the filter here functions according to the filtering principle.
  • On the filters which function according to this principle there are holes which are opened by laser; and the fuel arriving at the injection valve is filtered as it is passing this filter; and the particles accumulate on the filler and the filtered fuel is sprayed to the combustion chamber by means of the needle.
  • the filter is connected in a snap-fit manner to the filter housing, embodied on the injection valve, by nailing process.
  • the present invention relates to an axially fixed filter which cleans the particles existing inside the fuel entering into the injection valve which sprays fuel to the combustion chamber in internal combustion engines, in order to eliminate the abovementioned problems and to bring new advantages to the related technical field.
  • the main object of the present invention is to provide an injection valve where the filter, which is connected to the filter housing of an injector spraying fuel to the combustion chamber in internal combustion engines, is prevented from moving axially during the operation of the injector.
  • Another object of the present invention is to provide an injection valve where the filter of the injection valve, which is in connection onto the engine, can be fixed and removed without giving damage to the injection valve body and in an easy manner.
  • an injection valve for internal combustion engines which essentially comprises a valve body; an input region which exists in said body and through which the fuel enters; a filter housing which is provided inside said body in order for the fuel to be cleaned at said input region; a filter which is connected into the filter housing, Said injection valve comprises a screwing surface with a certain length on the internal surface of the filter housing; and an outer screw with a certain length so as to correspond to the screwing surface on the filter.
  • said screwing surface is embodied to the region which is adjacent to the inlet existing in the input region of the finer housing.
  • said filter is a grooved filter.
  • said outer screw is embodied on the grooved filter so as to be adjacent to the upper part.
  • the filter is a filter cartridge.
  • the filter cartridge has a wide region which is at a certain length and it has a narrow region at the continuation of the wide region and the outer screw is embodied to said wide region.
  • the screwing surface and the outer screw are embodied in the form of M3,5 x 0,6.
  • an injection valve (10) is disclosed which is improved for preventing the axial movement of the injection valve filter inside the filter housing, which sprays fuel to the combustion chamber of internal combustion engines.
  • the injection valve (10) is generally embodied in a cylindrical form and it comprises two main regions, namely the needle region (20) and an input region (30) around the needle region (20).
  • the needle region (20) comprises members for providing fuel spraying process in a controlled manner to the combustion chamber (not illustrated in the figures) by the injection valve (10).
  • a channel (11) is embodied between the needle region (20) and the input region (30).
  • a wider region is embodied when compared with the diameter of the channel (11); and this region is defined as the filter housing (32).
  • an inlet (31) part is embodied for providing the fuel to enter into the injection valve (10).
  • a screwing surface (321) which has a length of L and which has M3,5 x 0.6 dimensions, is embodied to the region of the filter housing (33) which is dose to the inlet (31) part.
  • filter housing (32) In the injection valve (10), two types of filters can be connected to the filter housing (32). These filter types are called namely the grooved filter (40) and the filter cartridge (50).
  • the grooved filter (40) is generally embodied so as to be cylindrical. On the lateral surface of the grooved filter (40) and beginning from the upper part (43), an outer screw (41) with a certain length and with a dimension of M3,5 x 0,6 is embodied. At the upper part (43), where the outer screw (41) is embodied, three grooves (42) are embodied so that there is an angle of 120 degrees in between on the cross section towards the lower part (44) and these grooves (42) end around the upper part (43). In the same manner, there are three grooves (42) which are embodied on the lateral surface from the upper part (43) towards the lower part (44) and which have an angle of 120 degrees with respect to each other on the cross section.
  • the grooves (42) end at a certain distance from the upper part (43) and at a vicinity of the outer screw (41) opened. Thanks to this, openings are embodied, which are called groove (42) and which exist on the two directions of the cylinder bases and which have an angle of 120 degrees with respect to each other and these grooves (42) extend orthogonally 35 to the cross sections of the upper and the lower part (43, 44).
  • groove (42) there are six grooves (42) where In one direction there are three grooves and in the other direction there are also three grooves.
  • the grooves (42) in both directions are embodied so as not to coincide with each other.
  • the filter cartridge (50) is embodied so as not to have a base and so as to have a hollow cylinder form; and at the side where the base is open, the diameter is wider than the diameter of the side where the base is closed.
  • This region is defined as the wide region (51).
  • the wide region (51) has a certain length and an outer screw (41) with said determined length and with dimensions of M3,5 x 0,6 is embodied here.
  • the cylinder diameter narrows after a certain length. The diameter stays fixed until the end of the cylinder beginning from the region where the diameter narrows. This region is defined as the narrow region (52).
  • holes (521) are embodied on the narrow region by means of the laser method; and the filter cartridge (50) has a screen-like appearance when viewed from above, the holes (521) have a diameter which is smaller than the diameter of the particles inside the fuel.
  • the input region (30), existing on the injection valve (10), is the region where fuel enters the system.
  • a filter which has properties suitable to the fuel to be used, is connected to the filter housing (32) embodied at the input region (30).
  • the grooved filter (40) or the filter cartridge (50), in connection with the filter housing (32), provides the fuel entering into the injection 20 valve (10) to be cleaned.
  • the channel (11), which is embodied between the input region (30) of the injection valve (10) and the needle region (20) in just the opposite direction, provides the fuel to be transferred to the needle region (20) of the input region (30).
  • the members, existing inside the needle region (20), spray fuel to the combustion chamber of the engine in a controlled manner and at a certain pressure.
  • the needle which functions as a valve member, opens and closes the spraying hole existing on the bottom point of the injection valve (10).
  • the fuel, arriving to the input region (30). is filtered in the filter region and the passage of the particles inside the fuel to the needle region (20) is prevented.
  • the filtering process is realized in two different ways depending on the characteristic of the filter used.
  • the grooved filters (40) clean the fuel with the help of mechanical friction and abrasion and with the help of the thermal effects.
  • the particles inside the fuel hit the groove (42) walls and they are thereby fragmented and the fragmented harmless particles are distributed into the fuel.
  • the filter cartridges (50) clean the fuel using the accumulation method. While the fuel , which enters into the filter cartridge (50), pass through the holes (521) which are opened by laser, the particles inside the fuel accumulate inside the filter cartridge (50) and the clean fuel exit through the filter cartridge (50).
  • the injection valve (10) essentially exists in connection with the combustion chamber of the engine.
  • the injection valve (10) is in connection where the part comprising the needle region (20) is inside the combustion chamber and where the other parts thereof are outside the combustion chamber.
  • the fuel which is transferred to the injection valve (10) by means of the fuel pump which is one of the pieces belonging to the engine fixtures, enters into the body (12) through the input region (30).
  • the fuel which will advance inside the channel (11), arrives at the filter region and the particles inside the fuel are deactivated by means of the affects which will be different depending on the characteristic of the filter used.
  • the fuel, whose filtering process is completed, is transferred to the needle region (20) by means of the channel (11); and the fuel is sprayed to the combustion chamber under high pressure in a cont rolled manner by the systems which are in connection inside the needle region (20).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP12176384.1A 2011-07-18 2012-07-13 Einspritzventil für Verbrennungsmotoren Withdrawn EP2549094A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TR2011/07061A TR201107061A2 (tr) 2011-07-18 2011-07-18 İçten yanmalı motorlar için bir enjeksiyon valfi.

Publications (2)

Publication Number Publication Date
EP2549094A2 true EP2549094A2 (de) 2013-01-23
EP2549094A3 EP2549094A3 (de) 2013-11-20

Family

ID=46514187

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12176384.1A Withdrawn EP2549094A3 (de) 2011-07-18 2012-07-13 Einspritzventil für Verbrennungsmotoren

Country Status (2)

Country Link
EP (1) EP2549094A3 (de)
TR (1) TR201107061A2 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016043302A (ja) * 2014-08-21 2016-04-04 株式会社日本自動車部品総合研究所 フィルタ
WO2020112362A1 (en) * 2018-11-29 2020-06-04 Caterpillar Inc. Filter for fuel injectors

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4608166A (en) 1985-04-01 1986-08-26 Filtertek, Inc. Press fit filter
DE10220632A1 (de) 2001-05-10 2002-12-12 Denso Corp Filter und Brennstoffeinspritzeinrichtung mit demselben
EP1296057A1 (de) 2001-09-19 2003-03-26 Filtertek, Inc. Integrierter Kraftstofffilter und Kalibrierungsrohr für ein Kraftstoffeinspritzventil
DE102009029312A1 (de) 2009-09-09 2011-03-10 Robert Bosch Gmbh Kraftstoffeinspritzvorrichtung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU945485A1 (ru) * 1980-12-22 1982-07-23 Ярославский завод дизельной аппаратуры Форсунка дл дизел
DE10238569A1 (de) * 2002-08-22 2004-03-04 Siemens Ag Injektor für ein Kraftstoff-Einspritzsystem eines Verbrennungsmotors sowie Filtervorrichtung
FR2874973B1 (fr) * 2004-09-09 2009-02-13 Renault Sas Circuit d'alimentation en combustible sous pression a moyens de filtrage et d'amortissement

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4608166A (en) 1985-04-01 1986-08-26 Filtertek, Inc. Press fit filter
DE10220632A1 (de) 2001-05-10 2002-12-12 Denso Corp Filter und Brennstoffeinspritzeinrichtung mit demselben
EP1296057A1 (de) 2001-09-19 2003-03-26 Filtertek, Inc. Integrierter Kraftstofffilter und Kalibrierungsrohr für ein Kraftstoffeinspritzventil
DE102009029312A1 (de) 2009-09-09 2011-03-10 Robert Bosch Gmbh Kraftstoffeinspritzvorrichtung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016043302A (ja) * 2014-08-21 2016-04-04 株式会社日本自動車部品総合研究所 フィルタ
WO2020112362A1 (en) * 2018-11-29 2020-06-04 Caterpillar Inc. Filter for fuel injectors

Also Published As

Publication number Publication date
TR201107061A2 (tr) 2012-07-23
EP2549094A3 (de) 2013-11-20

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