WO2017084901A1 - A fuel injector with corrosion protection - Google Patents

A fuel injector with corrosion protection Download PDF

Info

Publication number
WO2017084901A1
WO2017084901A1 PCT/EP2016/076782 EP2016076782W WO2017084901A1 WO 2017084901 A1 WO2017084901 A1 WO 2017084901A1 EP 2016076782 W EP2016076782 W EP 2016076782W WO 2017084901 A1 WO2017084901 A1 WO 2017084901A1
Authority
WO
WIPO (PCT)
Prior art keywords
spray pipe
fuel injector
fuel
engine block
induction coil
Prior art date
Application number
PCT/EP2016/076782
Other languages
French (fr)
Inventor
Mete ALTIN
Original Assignee
Robert Bosch Gmbh
Bosch Sanayi Ve Ticaret Anonim Sirketi
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, Bosch Sanayi Ve Ticaret Anonim Sirketi filed Critical Robert Bosch Gmbh
Priority to EP16794974.2A priority Critical patent/EP3377755B1/en
Publication of WO2017084901A1 publication Critical patent/WO2017084901A1/en

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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/005—Fuel-injectors combined or associated with other devices the devices being sensors
    • 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
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • F02M53/04—Injectors with heating, cooling, or thermally-insulating means
    • F02M53/06—Injectors with heating, cooling, or thermally-insulating means with fuel-heating means, e.g. for vaporising
    • 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
    • F02M2200/24—Fuel-injection apparatus with sensors
    • F02M2200/248—Temperature sensors

Definitions

  • the present invention relates to fuel injectors used for spraying fuel into the combustion chamber in internal combustion engines.
  • Fuel injectors in general provide spraying fuel with desired intervals into the combustion chamber in internal combustion engines.
  • the fuel which passes in a controlled manner through the valve region defined inside fuel injectors, passes through the spray pipe extending inside the engine block, and it arrives at the spray tip opened to the combustion chamber provided in the engine, and it is sprayed into the combustion chamber.
  • the acidic gases formed as a result of the explosions which occur in the combustion chamber, enter between the spray pipe and the engine block, and they lead to corrosion outside of the spray pipe, in other words, they lead to corrosion in the fuel injector.
  • the present invention relates to a fuel injector, 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 where corrosion between the spray pipe of the fuel injector and the engine block is prevented.
  • the present invention relates to a fuel injector having at least one spray pipe, in order to be used for providing spraying of fuel into the combustion chamber in a controlled manner in internal combustion engines. Accordingly, there is at least one induction coil connected to said spray pipe in order to increase the temperature in the vicinity of the spray pipe.
  • the periphery of the spray pipe is heated by means of the induction coil. By means of this, condensation and corrosion formation at the periphery of the spray pipe is prevented.
  • the induction coil at least partially surrounds the spray pipe.
  • the spray pipe is heated along the periphery thereof.
  • control unit connected to the temperature sensor.
  • the induction coil is activated.
  • the control unit activates the induction coil.
  • the spray pipe is positioned in an opening provided on the engine block.
  • the subject matter fuel injector (10) comprises an injector body (20) wherein the valve elements (21 ) are positioned.
  • the tip of said spray pipe (22) is defined as a spray tip (23).
  • the fuel injector (10) In order to provide reaching of the fuel, exiting the fuel injector (10), at the combustion chamber (32) formed inside the engine block (30), the fuel injector (10) is fixed to at least one opening (31 ) provided on the engine block (30).
  • the spray pipe (22) of the fuel injector (10) is positioned inside said opening (31 ).
  • there is at least one temperature sensor (40) which measures the temperature of the critical region (50) defined between the spray pipe (22) and the wall of the opening (31 ) provided on the engine block (30).
  • Said temperature sensor (40) transfers the measurement values to a control unit (60).
  • the fuel exiting the spray tip (23), reaches the combustion chamber (32).
  • the gases formed after the explosions occurring in the combustion chamber (32) try to enter into the critical region (50) defined between the engine block (30) and the spray pipe (22).
  • the gases, which enter between the spray pipe (22) and the engine block (30), condense in cases where the engine operates under low load and cools, and said gases may lead to corrosion in the critical region (50).
  • the control unit (60) can activate the induction coil (70) depending on the measured temperature value.
  • control unit (60) checks the amount of load applied to the motor, and it can activate the induction coil (70) in case of low loads, and the heating process can be realized.
  • the control unit (60) checks the amount of load applied to the motor, and it can activate the induction coil (70) in case of low loads, and the heating process can be realized.
  • the temperature between the inner wall of the opening (31 ) and the spray pipe (22) decreases under a predetermined critical value
  • the temperature is increased by means of the induction coil (70)
  • the condensation formation in the critical region (50) is prevented.
  • corrosion in the critical region (50) is also prevented.

Landscapes

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

Abstract

The present invention relates to a fuel injector (10) having at least one spray pipe (22), in order to be used for providing spraying of fuel into the combustion chamber (32) in a controlled manner in internal combustion engines. As an improvement, the subject matter fuel injector (10) comprises at least one induction coil (70) connected to said spray pipe (22) in order to increase the temperature in the vicinity of the spray pipe (22).

Description

SPECIFICATION
A FUEL INJECTOR WITH CORROSION PROTECTION TECHNICAL FIELD
The present invention relates to fuel injectors used for spraying fuel into the combustion chamber in internal combustion engines. PRIOR ART
Fuel injectors in general provide spraying fuel with desired intervals into the combustion chamber in internal combustion engines. The fuel, which passes in a controlled manner through the valve region defined inside fuel injectors, passes through the spray pipe extending inside the engine block, and it arrives at the spray tip opened to the combustion chamber provided in the engine, and it is sprayed into the combustion chamber. The acidic gases, formed as a result of the explosions which occur in the combustion chamber, enter between the spray pipe and the engine block, and they lead to corrosion outside of the spray pipe, in other words, they lead to corrosion in the fuel injector.
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, 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 where corrosion between the spray pipe of the fuel injector and the engine block is prevented.
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 relates to a fuel injector having at least one spray pipe, in order to be used for providing spraying of fuel into the combustion chamber in a controlled manner in internal combustion engines. Accordingly, there is at least one induction coil connected to said spray pipe in order to increase the temperature in the vicinity of the spray pipe. Thus, when desired, the periphery of the spray pipe is heated by means of the induction coil. By means of this, condensation and corrosion formation at the periphery of the spray pipe is prevented.
In a preferred embodiment of the subject matter invention, the induction coil at least partially surrounds the spray pipe. Thus, the spray pipe is heated along the periphery thereof.
In a preferred embodiment of the subject matter invention, there is at least one temperature sensor connected to the spray pipe.
In a preferred embodiment of the subject matter invention, there is at least one control unit connected to the temperature sensor. Thus, when the temperature around the spray pipe decreases below a pre-calculated value, the induction coil is activated. In another embodiment, when the load applied to the motor is reduced, it is expected that the temperature will decrease, and the control unit activates the induction coil.
In a preferred embodiment of the subject matter invention, the spray pipe is positioned in an opening provided on the engine block.
BRIEF DESCRIPTION OF THE FIGURES
In Figure 1 , a representative view of the subject matter fuel injector is given. REFERENCE NUMBERS
10 Fuel injector
20 Injector body
21 Valve element
22 Spray pipe
23 Spray tip
24 Fuel channel
30 Engine block
31 Opening
32 Combustion chamber
40 Temperature sensor
50 Critical region 60 Control unit
70 Induction coil
THE DETAILED DESCRIPTION OF THE INVENTION
In this detailed description, the subject matter fuel injector (10) is explained with references to examples without forming any restrictive effect only in order to make the subject more understandable. As can be seen in Figure 1 , the subject matter fuel injector (10) comprises an injector body (20) wherein the valve elements (21 ) are positioned. There is at least one spray pipe (22) extending outwardly from said injector body (20). The tip of said spray pipe (22) is defined as a spray tip (23). There is at least one fuel channel (24) extending through the injector body (20) towards the spray tip (23). The fuel, which is transferred to the fuel channel (24) under the control of the valve elements (21 ) inside the injector body (20), advances along the spray pipe (22), and it passes through the spray tip (23), and it exits the fuel injector (10).
In order to provide reaching of the fuel, exiting the fuel injector (10), at the combustion chamber (32) formed inside the engine block (30), the fuel injector (10) is fixed to at least one opening (31 ) provided on the engine block (30). The spray pipe (22) of the fuel injector (10) is positioned inside said opening (31 ). There is an induction coil (70) which at least partially surrounds the periphery of the spray pipe (22). By means of said induction coil (70), the spray pipe (22) and the inner wall of the opening (31 ) can be heated when desired. Moreover, there is at least one temperature sensor (40) which measures the temperature of the critical region (50) defined between the spray pipe (22) and the wall of the opening (31 ) provided on the engine block (30). Said temperature sensor (40) transfers the measurement values to a control unit (60). In said embodiment, the fuel, exiting the spray tip (23), reaches the combustion chamber (32). The gases formed after the explosions occurring in the combustion chamber (32) try to enter into the critical region (50) defined between the engine block (30) and the spray pipe (22). The gases, which enter between the spray pipe (22) and the engine block (30), condense in cases where the engine operates under low load and cools, and said gases may lead to corrosion in the critical region (50). By means of the induction coil (70) provided in the vicinity of the spray pipe (22), the critical region (50) is heated, and condensation and thus corrosion are prevented. The control unit (60) can activate the induction coil (70) depending on the measured temperature value. In an alternative embodiment, the control unit (60) checks the amount of load applied to the motor, and it can activate the induction coil (70) in case of low loads, and the heating process can be realized. By means of said embodiment, when the temperature between the inner wall of the opening (31 ) and the spray pipe (22) decreases under a predetermined critical value, the temperature is increased by means of the induction coil (70), the condensation formation in the critical region (50) is prevented. Thus, corrosion in the critical region (50) is also prevented. 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 (10) having at least one spray pipe (22), in order to be used for providing spraying of fuel into the combustion chamber (32) in a controlled manner in internal combustion engines, characterized by comprising at least one induction coil (70) connected to said spray pipe (22) in order to increase the temperature in the vicinity of the spray pipe (22).
2. An engine block (30) according to Claim 1 , characterized in that the induction coil (70) at least partially surrounds the spray pipe (22).
3. An engine block (30) according to Claim 1 , characterized by comprising at least one temperature sensor (40) connected to the spray pipe (22).
4. An engine block (30) according to Claim 3, characterized by comprising at least one control unit (60) connected to the temperature sensor (40).
5. An engine block (30) according to Claim 1 , characterized in that the spray pipe (22) is positioned in an opening (31 ) provided on the engine block (30).
PCT/EP2016/076782 2015-11-16 2016-11-07 A fuel injector with corrosion protection WO2017084901A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16794974.2A EP3377755B1 (en) 2015-11-16 2016-11-07 A fuel injector with corrosion protection

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2015/14396 2015-11-16
TR201514396 2015-11-16

Publications (1)

Publication Number Publication Date
WO2017084901A1 true WO2017084901A1 (en) 2017-05-26

Family

ID=57288381

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/076782 WO2017084901A1 (en) 2015-11-16 2016-11-07 A fuel injector with corrosion protection

Country Status (2)

Country Link
EP (1) EP3377755B1 (en)
WO (1) WO2017084901A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2559798A (en) * 2017-02-20 2018-08-22 Delphi Int Operations Luxembourg Sarl Fuel injector
WO2022133563A1 (en) * 2020-12-22 2022-06-30 Robert Bosch Limitada Device for heating fuel

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05288131A (en) * 1992-04-02 1993-11-02 Nippondenso Co Ltd Fuel supply device of internal combustion engine
JPH10238424A (en) * 1997-02-21 1998-09-08 Denso Corp Fuel injector
WO2004025112A1 (en) * 2002-09-11 2004-03-25 Vaporate Pty Ltd Fuel delivery system
WO2007109219A2 (en) * 2006-03-17 2007-09-27 Continental Automotive Systems Us, Inc. Variable inductive heated injector
DE102011085680A1 (en) * 2011-11-03 2013-05-08 Continental Automotive Gmbh Heating coil for an injection valve and injection valve

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010265774A (en) * 2009-05-12 2010-11-25 Nippon Soken Inc Starter and starting method for internal combustion engine
US8884198B2 (en) * 2010-01-22 2014-11-11 Continental Automotive Systems, Inc. Parametric temperature regulation of induction heated load

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05288131A (en) * 1992-04-02 1993-11-02 Nippondenso Co Ltd Fuel supply device of internal combustion engine
JPH10238424A (en) * 1997-02-21 1998-09-08 Denso Corp Fuel injector
WO2004025112A1 (en) * 2002-09-11 2004-03-25 Vaporate Pty Ltd Fuel delivery system
WO2007109219A2 (en) * 2006-03-17 2007-09-27 Continental Automotive Systems Us, Inc. Variable inductive heated injector
DE102011085680A1 (en) * 2011-11-03 2013-05-08 Continental Automotive Gmbh Heating coil for an injection valve and injection valve

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2559798A (en) * 2017-02-20 2018-08-22 Delphi Int Operations Luxembourg Sarl Fuel injector
GB2559798B (en) * 2017-02-20 2020-03-11 Delphi Automotive Systems Lux Fuel injector
WO2022133563A1 (en) * 2020-12-22 2022-06-30 Robert Bosch Limitada Device for heating fuel
US12006897B2 (en) 2020-12-22 2024-06-11 Robert Bosch Limitada Device for heating fuel

Also Published As

Publication number Publication date
EP3377755B1 (en) 2021-05-26
EP3377755A1 (en) 2018-09-26

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