EP3377739B1 - An engine block which protects fuel injector against corrosion - Google Patents

An engine block which protects fuel injector against corrosion Download PDF

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Publication number
EP3377739B1
EP3377739B1 EP16791038.9A EP16791038A EP3377739B1 EP 3377739 B1 EP3377739 B1 EP 3377739B1 EP 16791038 A EP16791038 A EP 16791038A EP 3377739 B1 EP3377739 B1 EP 3377739B1
Authority
EP
European Patent Office
Prior art keywords
engine block
spray pipe
fuel injector
fuel
channel
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
EP16791038.9A
Other languages
German (de)
French (fr)
Other versions
EP3377739A2 (en
Inventor
Mete ALTIN
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
Bosch Sanayi ve Ticaret AS
Original Assignee
Robert Bosch GmbH
Bosch Sanayi ve Ticaret AS
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 AS filed Critical Robert Bosch GmbH
Publication of EP3377739A2 publication Critical patent/EP3377739A2/en
Application granted granted Critical
Publication of EP3377739B1 publication Critical patent/EP3377739B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
    • F01N13/105—Other arrangements or adaptations of exhaust conduits of exhaust manifolds having the form of a chamber directly connected to the cylinder head, e.g. without having tubes connected between cylinder head and chamber
    • 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
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • 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
    • F02M2200/05—Fuel-injection apparatus having means for preventing corrosion

Definitions

  • the present invention relates to fuel injectors used for spraying fuel into the combustion chamber in internal combustion engines, and relates to engine blocks whereon said injectors are placed.
  • 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.
  • WO 02/097259 A1 discloses a fuel injector mounted in a bore in the intake manifold and heated by exhaust gas from the exhaust system, the exhaust gas flowing around the injector tip mounted in its bore and being returned to the exhaust system, the exhaust gas heating the injector in order to enhance fuel evaporation after injection.
  • the present invention relates to an engine block, 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 an engine block where corrosion between the spray pipe of the fuel injector and the engine block is prevented.
  • the present invention as defined in claim 1 relates to an engine block where a fuel injector having at least one spray pipe is fixed, in order to be used for providing spraying of fuel into the combustion chamber in a controlled manner in internal combustion engines.
  • said engine block comprises at least one channel wherein hot exhaust gases circulate in order to increase the temperature in the vicinity of said spray pipe.
  • hot exhaust gases are transferred into the channel and thus, the periphery of the spray pipe is heated. By means of this, condensation and corrosion formation at the periphery of the spray pipe is prevented.
  • the channel at least partially surrounds the spray pipe and is connected to the exhaust system of the internal combustion engine.
  • the spray pipe is heated along the periphery thereof.
  • control unit connected to the temperature sensor.
  • the control unit provides transfer of hot exhaust gases to the channel.
  • 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) is fixed to at least one opening (31) provided on the engine block (30).
  • Said channel (33) at least partially surrounds the periphery of the fuel injector (10).
  • the channel (33) is connected to the exhaust system (not illustrated in the figures) of the engine. In other words, the hot gases formed after combustion in the combustion chamber (32) can be transferred into the channel (33) when desired.
  • 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 hot exhaust gases formed in the combustion chamber (32) are transferred into the channels (33), and the periphery of the critical region (50) is heated. Thus, condensation and thereby corrosion are prevented.
  • the control unit (60) can provide transfer of the hot gases into the channel (33) depending on the measured temperature value.
  • control unit (60) checks the amount of load applied to the motor, and it can provide transfer of hot exhaust gases to the channel (33) in case of low loads.
  • the critical region (50) is heated without needing additional energy, and thereby corrosion is prevented.

Description

    TECHNICAL FIELD
  • The present invention relates to fuel injectors used for spraying fuel into the combustion chamber in internal combustion engines, and relates to engine blocks whereon said injectors are placed.
    • 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.
  • WO 02/097259 A1 discloses a fuel injector mounted in a bore in the intake manifold and heated by exhaust gas from the exhaust system, the exhaust gas flowing around the injector tip mounted in its bore and being returned to the exhaust system, the exhaust gas heating the injector in order to enhance fuel evaporation after injection.
  • 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 an engine block, 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 an engine block 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 as defined in claim 1 relates to an engine block where a fuel injector having at least one spray pipe is fixed, in order to be used for providing spraying of fuel into the combustion chamber in a controlled manner in internal combustion engines. Accordingly, said engine block comprises at least one channel wherein hot exhaust gases circulate in order to increase the temperature in the vicinity of said spray pipe. Thus, when desired, hot exhaust gases are transferred into the channel and thus, the periphery of the spray pipe is heated. By means of this, condensation and corrosion formation at the periphery of the spray pipe is prevented.
  • According to the invention, the channel at least partially surrounds the spray pipe and is connected to the exhaust system of the internal combustion engine. 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, hot exhaust gases are transferred to the channel. In another embodiment, when the load applied to the motor is reduced, it is expected that the temperature will decrease, and the control unit provides transfer of hot exhaust gases to the channel.
  • 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 engine block and of the fuel injector provided on said engine block 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
    33 Channel
    40
    Temperature sensor
    50
    Critical region
    60
    Control unit
    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). On the engine block (30), there is at least one channel (33) provided in the vicinity of the fuel injector (10). Said channel (33) at least partially surrounds the periphery of the fuel injector (10). The channel (33) is connected to the exhaust system (not illustrated in the figures) of the engine. In other words, the hot gases formed after combustion in the combustion chamber (32) can be transferred into the channel (33) 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). In order to prevent said corrosion, the hot exhaust gases formed in the combustion chamber (32) are transferred into the channels (33), and the periphery of the critical region (50) is heated. Thus, condensation and thereby corrosion are prevented. The control unit (60) can provide transfer of the hot gases into the channel (33) 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 provide transfer of hot exhaust gases to the channel (33) in case of low loads. By means of said embodiment, the critical region (50) is heated without needing additional energy, and thereby corrosion is 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. The scope of the invention is defined by the appended claims.

Claims (4)

  1. An engine block (3) where a fuel injector (10) having at least one spray pipe (22) is fixed, in order to be used for providing spraying offuel into the combustion chamber (32) in a controlled manner in internal combustion engines, characterized in that said engine block (30) comprises at least one channel (33) at least partially surrounding said spray pipe (22) and being connected to the exhaust system of the internal combustion engine, wherein hot exhaust gases circulate in order to increase the temperature in a critical region (50) defined between the engine block (30) and said spray pipe (22).
  2. An engine block (30) according to claim 1, characterized by comprising at least one temperature sensor (40) assigned to said critical region (50) connected to the spray pipe (22).
  3. An engine block (30) according to claim 2, characterized by comprising at least one control unit (60) connected to the temperature sensor(40).
  4. 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).
EP16791038.9A 2015-11-16 2016-11-07 An engine block which protects fuel injector against corrosion Active EP3377739B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2015/14417A TR201514417A2 (en) 2015-11-16 2015-11-16 An engine block which protects fuel injector against corrosion
PCT/EP2016/076786 WO2017084902A2 (en) 2015-11-16 2016-11-07 An engine block which protects fuel injector against corrosion

Publications (2)

Publication Number Publication Date
EP3377739A2 EP3377739A2 (en) 2018-09-26
EP3377739B1 true EP3377739B1 (en) 2020-06-17

Family

ID=57233483

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16791038.9A Active EP3377739B1 (en) 2015-11-16 2016-11-07 An engine block which protects fuel injector against corrosion

Country Status (3)

Country Link
EP (1) EP3377739B1 (en)
TR (1) TR201514417A2 (en)
WO (1) WO2017084902A2 (en)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1967243A (en) * 1926-12-31 1934-07-24 Hesselman Motor Corp Ltd Internal combustion engine
FR1536850A (en) * 1967-09-15 1968-08-16 Daimler Benz Ag Method for injecting an adjustable quantity of fuel into the compression stroke of an internal combustion engine with independent ignition, and internal combustion engine for carrying out the method
IT1118641B (en) * 1979-05-22 1986-03-03 Fiat Ricerche INTERNAL COMBUSTION ENGINE WITH COMMAND IGNITION AND PETROL INJECTION IN THE CYLINDER
US5950596A (en) * 1997-10-28 1999-09-14 Brunswick Corporation Fuel injector deflector
JP2002161827A (en) * 2000-11-29 2002-06-07 Toyota Motor Corp Fuel system for internal combustion engine
BR0210121A (en) * 2001-06-01 2004-04-06 Vaporate Pty Ltd Fuel distribution system for an internal combustion engine
US6779513B2 (en) * 2002-03-22 2004-08-24 Chrysalis Technologies Incorporated Fuel injector for an internal combustion engine
US6874467B2 (en) * 2002-08-07 2005-04-05 Hitachi, Ltd. Fuel delivery system for an internal combustion engine
CN202851218U (en) * 2012-09-20 2013-04-03 金华三人科技有限公司 Fuel injection system using heat pipe technology to take heat from exhaust gas for diesel evaporation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2017084902A2 (en) 2017-05-26
WO2017084902A3 (en) 2018-02-15
TR201514417A2 (en) 2017-02-21
EP3377739A2 (en) 2018-09-26

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