EP3303818A1 - A fuel injector having a composite element - Google Patents

A fuel injector having a composite element

Info

Publication number
EP3303818A1
EP3303818A1 EP16725824.3A EP16725824A EP3303818A1 EP 3303818 A1 EP3303818 A1 EP 3303818A1 EP 16725824 A EP16725824 A EP 16725824A EP 3303818 A1 EP3303818 A1 EP 3303818A1
Authority
EP
European Patent Office
Prior art keywords
fuel injector
composite material
humidity
chip powder
element made
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
EP16725824.3A
Other languages
German (de)
French (fr)
Other versions
EP3303818B1 (en
Inventor
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 EP3303818A1 publication Critical patent/EP3303818A1/en
Application granted granted Critical
Publication of EP3303818B1 publication Critical patent/EP3303818B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F02M61/166—Selection of particular materials
    • 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
    • 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
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
    • 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
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/858—Mounting of fuel injection apparatus sealing arrangements between injector and engine
    • 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
    • F02M2200/90—Selection of particular materials
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9015—Elastomeric or plastic materials

Definitions

  • the present invention relates to a fuel injector having an element made of a material which provides sealing.
  • thermoplastic derived (preferably polyamide 66) materials are placed to the top section of the metal fuel injector by means of plastic injection so as to contact the body and so as to cover the electrical fixture.
  • thermoplastic derived (preferably polyamide 66) materials are placed to the top section of the metal fuel injector by means of plastic injection so as to contact the body and so as to cover the electrical fixture.
  • liquid leakages may occur in the intermediate region between the two surfaces.
  • the holding between two different materials is weaker than the holding between two same materials, liquid leakages may occur between the metal body and the plastic material placed thereon. Due to this leakage, corrosion occurs because of the contact of the liquid to the metal body, and the usage lifetime of the fuel injectors decreases.
  • the humidity, leaking to the fuel injector, can advance through the cables, and it can reach the sensitive electrical fixture, and it can lead to corrosion and/or short circuit. This can lead to small-scaled or big-scaled problems.
  • the present invention relates to a fuel injector having an element made of polymer based composite material, for eliminating the above mentioned disadvantages and for bringing new advantages to the related technical field.
  • the main object of the present invention is to provide a fuel injector whose usage lifetime is increased.
  • the present invention is a fuel injector having an element made of polymer based composite material developed for preventing medium humidity and for providing sealing. Accordingly, said composite material comprises chip powder which absorbs the humidity in the medium. Thus, the humidity is restrained by the chip powder.
  • said chip powder proportion is between 50 % and 90 %.
  • the polymer material is a thermoplastic polymer material.
  • the polymer material can be easily shaped by means of the thermal process.
  • the subject matter sealing material is a composite material comprising polymer and wood chip powder. Predetermined proportions of chip powders are added into the material which comprises polymer, and they are compressed under high pressure. In the preferred application, the chip powder proportion within the composite material changes between 50 % and 90 %.
  • thermoplastic material is used as the polymer material.
  • the chip powder, provided in the composite material absorbs the humidity existing in the medium, and it does not give the liquid out since the periphery thereof is encircled with plastic material molecules.
  • said plastic-chip powder composite material is produced by means of the plastic injection method, however, alternative production methods like extrusion, etc. can also be used optionally.
  • the motor block functions in fuel media, there is always evaporated fuel and water in the medium.
  • the humidity is absorbed and restrained by means of chip powder before it reaches sensitive electronic fixture and metal surface, and as a result of this, the corrosion and deterioration of the fuel injector are prevented and thus, the usage lifetime increases.
  • composite material can also be used in the trim fixtures of vehicles. Thanks to the improved plastic-chip powder composite material, the holding surface between the metal and the polymer material increases, and as a result of this, the holding force also increases.
  • said polyamide-chip powder composite material is used in the pieces of the fuel injector which are provided on the side facing outside of the motor block.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

The present invention is a fuel injector having an element made of polymer based composite material developed for preventing medium humidity and for providing sealing, characterized in that said composite material comprises chip powder which absorbs the humidity in the medium.

Description

SPECIFICATION
A FUEL INJECTOR HAVING A COMPOSITE ELEMENT TECHNICAL FIELD
The present invention relates to a fuel injector having an element made of a material which provides sealing. PRIOR ART
In the present art, thermoplastic derived (preferably polyamide 66) materials are placed to the top section of the metal fuel injector by means of plastic injection so as to contact the body and so as to cover the electrical fixture. However, in this method, since the thermal expansion coefficients of plastic and metal materials are different, liquid leakages may occur in the intermediate region between the two surfaces. At the same time, since the holding between two different materials is weaker than the holding between two same materials, liquid leakages may occur between the metal body and the plastic material placed thereon. Due to this leakage, corrosion occurs because of the contact of the liquid to the metal body, and the usage lifetime of the fuel injectors decreases.
The humidity, leaking to the fuel injector, can advance through the cables, and it can reach the sensitive electrical fixture, and it can lead to corrosion and/or short circuit. This can lead to small-scaled or big-scaled problems.
As a result, because of all of the abovementioned problems, an improvement is required in the related technical field.
BRIEF DESCRIPTION OF THE INVENTION
The present invention relates to a fuel injector having an element made of polymer based composite material, for eliminating the above mentioned disadvantages and for bringing new advantages to the related technical field. The main object of the present invention is to provide a fuel injector whose usage lifetime is increased. In order to realize all of the abovementioned objects and the objects which are to be deducted from the detailed description below, the present invention is a fuel injector having an element made of polymer based composite material developed for preventing medium humidity and for providing sealing. Accordingly, said composite material comprises chip powder which absorbs the humidity in the medium. Thus, the humidity is restrained by the chip powder.
In a preferred embodiment of the subject matter invention, said chip powder proportion is between 50 % and 90 %.
In another preferred embodiment of the subject matter invention, the polymer material is a thermoplastic polymer material. Thus, it can be easily shaped by means of the thermal process. THE DETAILED DESCRIPTION OF THE INVENTION
In this detailed description, the subject matter fuel injector, having an element made of polymer based composite material, is explained with references to examples without forming any restrictive effect only in order to make the subject more understandable.
The subject matter sealing material is a composite material comprising polymer and wood chip powder. Predetermined proportions of chip powders are added into the material which comprises polymer, and they are compressed under high pressure. In the preferred application, the chip powder proportion within the composite material changes between 50 % and 90 %. As the polymer material, thermoplastic material is used. The chip powder, provided in the composite material, absorbs the humidity existing in the medium, and it does not give the liquid out since the periphery thereof is encircled with plastic material molecules. Preferably said plastic-chip powder composite material is produced by means of the plastic injection method, however, alternative production methods like extrusion, etc. can also be used optionally.
Since the motor block functions in fuel media, there is always evaporated fuel and water in the medium. By means of said composite material, the humidity is absorbed and restrained by means of chip powder before it reaches sensitive electronic fixture and metal surface, and as a result of this, the corrosion and deterioration of the fuel injector are prevented and thus, the usage lifetime increases. Besides the use in fuel injectors, composite material can also be used in the trim fixtures of vehicles. Thanks to the improved plastic-chip powder composite material, the holding surface between the metal and the polymer material increases, and as a result of this, the holding force also increases. In the preferred application, after the fuel injector is positioned on the motor block, said polyamide-chip powder composite material is used in the pieces of the fuel injector which are provided on the side facing outside of the motor block.
The protection scope of the present invention is set forth in the annexed Claims and cannot be restricted to the illustrative disclosures given above, under the detailed description. It is because a person skilled in the relevant art can obviously produce similar embodiments under the light of the foregoing disclosures, without departing from the main principles of the present invention.

Claims

1 . A fuel injector having an element made of polymer based composite material developed for preventing medium humidity and for providing sealing, characterized in that said composite material comprises chip powder which absorbs the humidity in the medium.
2. A fuel injector having an element made of polymer based composite material according to Claim 1 , characterized in that said chip powder proportion is between 50 % and 90 %.
3. A fuel injector having an element made of polymer based composite material according to Claim 1 , characterized in that the polymer material is a thermoplastic polymer material.
EP16725824.3A 2015-05-25 2016-05-23 A fuel injector having a composite element Active EP3303818B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR201506267 2015-05-25
PCT/EP2016/061550 WO2016188944A1 (en) 2015-05-25 2016-05-23 A fuel injector having a composite element

Publications (2)

Publication Number Publication Date
EP3303818A1 true EP3303818A1 (en) 2018-04-11
EP3303818B1 EP3303818B1 (en) 2020-02-19

Family

ID=56087248

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16725824.3A Active EP3303818B1 (en) 2015-05-25 2016-05-23 A fuel injector having a composite element

Country Status (2)

Country Link
EP (1) EP3303818B1 (en)
WO (1) WO2016188944A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4212277A (en) * 1978-03-06 1980-07-15 The Bendix Corporation Economy throttle body for hot fuel handling
DE4325980C2 (en) * 1993-08-03 2003-06-26 Bosch Gmbh Robert Device for the common electrical contacting of several electrically excitable units of internal combustion engines
US6640783B2 (en) * 2001-02-15 2003-11-04 Delphi Technologies, Inc. Composite fuel rail with integral damping and a co-injected non-permeation layer
DE10229899A1 (en) * 2002-07-03 2004-01-29 Siemens Ag Process for producing a seal on an injector and injector with improved high-pressure seal
DE112004000356D2 (en) * 2003-03-27 2006-02-23 Siemens Ag Direct injection valve in a cylinder head

Also Published As

Publication number Publication date
WO2016188944A1 (en) 2016-12-01
EP3303818B1 (en) 2020-02-19

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