WO2022218871A1 - Adaptateur annulaire pour injecteur et procédé de fabrication associé - Google Patents
Adaptateur annulaire pour injecteur et procédé de fabrication associé Download PDFInfo
- Publication number
- WO2022218871A1 WO2022218871A1 PCT/EP2022/059509 EP2022059509W WO2022218871A1 WO 2022218871 A1 WO2022218871 A1 WO 2022218871A1 EP 2022059509 W EP2022059509 W EP 2022059509W WO 2022218871 A1 WO2022218871 A1 WO 2022218871A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wall
- adapter
- injector
- projections
- forming
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 19
- 239000000463 material Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 239000007769 metal material Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000000446 fuel Substances 0.000 description 11
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000000137 annealing Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000008407 joint function Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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
- 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
- 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
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
-
- 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
- F02M2200/9053—Metals
Definitions
- the present disclosure relates to an annular adapter for arranging an injector in a cylinder head of an engine, and an associated manufacturing method.
- An engine in particular a gasoline direct injection engine or GDI (from the English "gasoline direct-injection"), comprises a plurality of hollow cylinders defining a combustion chamber in which combustion of a mixture fuel-air occurs.
- the fuel arrives in the cylinder from a fuel pump.
- the fuel pump is connected to an injection rail which receives the fuel and distributes it to a plurality of injectors, each injector being arranged in a cylinder head of a respective cylinder. A portion of one end of the injector enters the combustion chamber, allowing fuel to be introduced into each cylinder.
- the injector is in particular housed in an intake pipe included in the cylinder head.
- a space exists between a side wall of the injector and a wall of the intake manifold, so that a clearance appears between the injector and the cylinder head.
- the play which is particularly significant when the injection rail is fixed to the injector, can damage the injector and/or the cylinder head, or even move the injector from its position in the intake manifold.
- the adapter may for example be a ring allowing a degree of freedom of the injector when it is installed in the cylinder head, while retaining the portion of the end of the injector in the combustion chamber.
- the adapter may comprise a plurality of wings which fit into a notch of the injector.
- wings can have a low resistance to the mechanical stresses induced when the injector is operational, that is to say, when the fuel passes through the injector when the engine is running.
- the adapter can be held in position on the injector by means of a surface projecting over the entire circumference of an internal face of the ring and fitting into the notch of the injector.
- the adapter may include a adapter part and a part for holding the adapter part in position.
- An object of the present invention is to provide an adapter for placing the injector in the cylinder head, the adapter having sufficient resistance against the mechanical stresses to which the adapter is subjected.
- Such stresses can for example be between 700 N and 1100 N when the injector is not operational, that is to say, when the fuel does not pass through the injector.
- the mechanical stresses to which the adapter is subjected may for example be between 1200 N and 3500 N due to the pressure exerted by the fuel passing through the injector.
- Another object of the present invention is to provide such an adapter having a low manufacturing cost.
- JP S62 294763 A describes a forged seal for an injector, which comprises an annular flat body and has an annular projection on each of the faces of the ring.
- annular adapter for arranging an injector in a cylinder head of an engine cylinder, the adapter having a body comprising an internal wall and an external wall, the internal wall comprising a plurality of projections intended to come into contact with the injector, the adapter being obtained by cold forming.
- the adapter is obtained by cold stamping.
- the plurality of projections extends substantially perpendicular to the internal wall.
- the internal wall comprises between four and six projections.
- the internal wall comprises five projections.
- the plurality of projections is made in one piece with the internal wall.
- the adapter is made of metallic material, preferably stainless steel.
- a diameter of the outer wall is between 10 mm and 20 mm, preferably between 13 mm and 16 mm.
- the body has an annular shape.
- an adapter for placing an injector in a cylinder head of an engine cylinder comprising:
- the body comprising an internal wall and an external wall;
- the cold forming includes cold stamping.
- the method further comprises applying an anneal to the adapter after forming the body and the plurality of protrusions.
- forming by cold heading comprises one or more of the following steps:
- each projection 32 is formed integrally with the internal wall 25, the displacement of material forming hollow portions (33).
- the invention also relates to an adapter as disclosed in this text, installed around the injector. Brief description of the drawings
- FIG. 1 shows a front view of an example of an assembly formed by an injector inserted into the cylinder head of an engine cylinder and connected to an injection rail.
- FIG. 2 shows a front view of the assembly example of FIG. 1 in which the injector is surrounded by an adapter according to an embodiment of the present invention for placing the injector in the cylinder head according to the present invention.
- FIG. 3 shows a schematic perspective view from below of the adapter of figure 2.
- FIG. 4 shows a schematic perspective view from above of the adapter of figure 3.
- FIG. 5 shows a schematic view in longitudinal section of the adapter of figure 3.
- Figures 1 and 2 show an injector 10 installed in a cylinder head 11 of a cylinder 12 of an engine (not shown), such as, for example, a direct injection engine of gasoline or GDI (from the English “gasoline direct-injection”).
- a first end 13 of the injector 10 is arranged in an intake manifold 14 included in the cylinder head 11.
- An injection rail 15 is connected to the injector 10.
- the rail 15 is for example fixed on a second end 16 of the injector 10 opposite the first end 13.
- the rail 15 makes it possible to supply the injector 10 with fuel, this fuel then being ejected by the injector 10 inside the cylinder 12.
- the intake manifold 14 comprises a housing 17 delimited by a wall 18.
- the housing 17 has a shape substantially complementary to a shape of the first end 13 of the injector 10 , so as to be able to install the first end 13 of the injector 10 in the intake manifold 14.
- a portion 34 of the first end 13 protrudes inside the cylinder 12.
- a space 19 exists between the injector 10 and the wall 18 of the intake manifold
- an adapter 20 is installed around the injector 10.
- the adapter 20 will now be described with reference to Figures 3 to 5.
- the adapter 20 is for example annular.
- the adapter 20 comprises a body 21 comprising an upper wall 22, a lower wall 23, an outer wall 24 and an inner wall 25.
- the body 21 has a substantially annular section, but any other section is possible.
- a passage 26 delimited by the inner wall 25 passes through the body 21 between the upper wall 22 and the lower wall 23 in a longitudinal direction L1.
- the passage 26 is shaped to receive the injector 10.
- the passage 26 has for example a substantially cylindrical shape, without this being limiting.
- the upper wall 22 comprises a rim 27 and a bearing surface 28.
- the bearing surface 28 extends substantially transversely to the longitudinal direction L1 between the flange 27 and the inner wall 25 of the adapter 20.
- a bend 29, visible in Figure 5 is formed between the inner wall 25 and bearing surface 28.
- bearing surface 28 is substantially inclined.
- the support surface 28 gradually sinks in the longitudinal direction L1 from the elbow 29 to the edge 27.
- the flange 27 extends in the direction L1 from the outer wall 24 and protrudes from the bearing surface 28 in the longitudinal direction L1.
- the bearing surface 28 thus forms a recessed surface.
- the injector 10 rests on the upper wall 22, in particular on the bearing surface 28, when it is received in the passage 26.
- the elbow 29 has a ball joint function allowing angular movement of the injector 10 with respect to adapter 20 when it is installed in passage 26.
- the bottom wall 23, visible in FIG. 3, comprises a main surface 30 and a recessed zone 31 which are substantially perpendicular to the longitudinal direction L1.
- the main surface 30 extends between the outer wall 24 and the recessed area 31.
- the recessed zone 31 extends between the main surface 30 and the internal wall 25.
- the lower wall 23 is intended to come into contact with a support zone 35
- the outer wall 24 is intended to face the wall 18 of the housing 17.
- the outer wall 24 and the wall 18 are substantially spaced from each other, which allows a degree of freedom of the injector 10 when it is installed in the cylinder head 11.
- the outer wall 24 has a substantially cylindrical shape, without this being limiting.
- a diameter D1 of the outer wall 24 is for example between 10 mm and 20 mm, preferably between 13 mm and 16 mm.
- the inner wall 25 comprises a plurality of projections 32.
- the plurality of projections 32 comprises for example between four and six projections 32, preferably five projections 32. Of course, any other number of projections 32 is possible.
- the projections 32 are for example regularly distributed on the internal wall 25, but any other distribution is possible.
- Each projection 32 extends substantially perpendicular to the inner wall 25 so as to penetrate the passage 26.
- each projection 32 is intended to come into contact with the injector 10 when it is installed in the passage 26
- each projection 32 is at the same height in the longitudinal direction L1 as the recessed zone 31, but any other position of the projection 32 on the internal wall 25 is possible.
- a hollow portion 33 extends in the longitudinal direction L1 between each projection 32 and the upper wall 22.
- Each hollow portion 33 has for example a width substantially equal to a width of the respective projection 32.
- the plurality of projections 32 is made in one piece with the inner wall 25 as will be explained below.
- the adapter 20 is made of metallic material, preferably stainless steel.
- the plurality of projections 32 makes it possible to hold the adapter 20 in position relative to the injector 10.
- the injector 10 provided with the adapter 20 can be transported while limiting the risks of detachment of the adapter 20.
- Each projection 32 can be subjected to a stress of between 50 N and 500 N during the installation of the injector 10 in the passage 26, and once it is placed in said passage 26.
- each projection 32 being substantially perpendicular to the internal wall
- the adapter 20 is obtained by cold forming, which improves its mechanical properties.
- the adapter 20 is capable of withstanding stresses greater than or equal to 3500 N without undergoing deformations, which prevents damage to the adapter 20 when the engine is in operation and, consequently, the injector 10 operational.
- the stress to which the adapter 20 is subjected can be between 1200 N and 3500 N.
- Cold forming also makes it possible to easily adapt the dimensional characteristics of the adapter 20 to each injector 10 and each cylinder head 11.
- Cold forming makes it possible, for example, to manufacture adapters 20 having a diameter D1 smaller than the adapters known from the prior art, so that the lower wall 23 can come into contact with the support zone 35.
- the method includes forming the body 21 of the adapter 20 by cold forming.
- the body 21 is in particular formed by applying cold forming to a wire (not shown) made of the same material as the adapter 20.
- a piece of wire that is to say a section, is used.
- the wire extends in a longitudinal direction and has, for example, a substantially circular cross section having a diameter smaller than the diameter of the outer wall 24 of the body 21 as defined above.
- the cross section of the wire has for example a diameter of between 7 mm and 10 mm.
- Cold forming includes, for example, cold stamping.
- Cold stamping makes it possible to deform the wire by displacement of material from one or more forces applied to the wire.
- the upper 22, lower 23, outer 24 and inner 25 walls as described above are thus formed.
- the section of the body 21 formed is for example substantially annular.
- the formation of the body 21 by cold stamping comprises the application of a force in the longitudinal direction of the wire on a portion of the cross section some thread.
- This force causes a displacement of material in the longitudinal direction of the wire, so as to create a cavity passing through the wire longitudinally.
- the formation of the body by cold stamping can then comprise the application of a force to the cavity in a direction substantially transverse to the longitudinal direction of the wire, so as to enlarge the cavity and form the passage 26 (i.e. i.e. the diameter of the inner wall).
- Forming the body 21 by cold stamping can also include crushing the wire in its longitudinal direction in order to flatten it.
- the method further comprises the formation of the plurality of projections 32 by cold forming on the internal wall 25.
- each projection 32 is formed by cold stamping applied to the internal wall 25, so that each projection 32 is formed in one piece with the internal wall 25.
- Each projection 32 is for example formed by applying a force causing a displacement of material of the internal wall 25.
- the hollow portion 33 associated with each projection 32 is thus formed.
- the projections 32 formed extend substantially perpendicular to the inner wall 25 and are, for example, four to six in number, preferably five.
- the method may further comprise the application of annealing to the adapter 20.
- the annealing allows relaxation of the internal stresses generated by the cold heading.
- cold forming makes it possible to increase the manufacturing volumes of adapters 20, which contributes to reducing the manufacturing cost of each adapter 20.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22721395.6A EP4323634A1 (fr) | 2021-04-12 | 2022-04-08 | Adaptateur annulaire pour injecteur et procédé de fabrication associé |
CN202280027169.9A CN117203421A (zh) | 2021-04-12 | 2022-04-08 | 用于喷射器的环形转接器及相关制造方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FRFR2103762 | 2021-04-12 | ||
FR2103762A FR3121715A1 (fr) | 2021-04-12 | 2021-04-12 | Adaptateur annulaire pour injecteur et procede de fabrication associe |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022218871A1 true WO2022218871A1 (fr) | 2022-10-20 |
Family
ID=75954096
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2022/059509 WO2022218871A1 (fr) | 2021-04-12 | 2022-04-08 | Adaptateur annulaire pour injecteur et procédé de fabrication associé |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP4323634A1 (fr) |
CN (1) | CN117203421A (fr) |
FR (1) | FR3121715A1 (fr) |
WO (1) | WO2022218871A1 (fr) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62294763A (ja) * | 1986-06-13 | 1987-12-22 | Tokyo Gasket Kogyo Kk | インジエクシヨン・ノズル用シ−ルガスケツト |
GB2310250A (en) * | 1996-02-17 | 1997-08-20 | Bosch Gmbh Robert | Fuel injection valve for internal combustion engines |
US5954343A (en) * | 1995-10-17 | 1999-09-21 | Mitsubishi Denki Kabushika Kaisha | Seal ring |
US20070228662A1 (en) * | 2003-08-22 | 2007-10-04 | Ferdinand Reiter | Compensating Element for a Fuel Injector |
DE102011003957A1 (de) * | 2011-02-10 | 2012-08-16 | Elringklinger Ag | Dichtelement |
-
2021
- 2021-04-12 FR FR2103762A patent/FR3121715A1/fr active Pending
-
2022
- 2022-04-08 EP EP22721395.6A patent/EP4323634A1/fr active Pending
- 2022-04-08 CN CN202280027169.9A patent/CN117203421A/zh active Pending
- 2022-04-08 WO PCT/EP2022/059509 patent/WO2022218871A1/fr active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62294763A (ja) * | 1986-06-13 | 1987-12-22 | Tokyo Gasket Kogyo Kk | インジエクシヨン・ノズル用シ−ルガスケツト |
US5954343A (en) * | 1995-10-17 | 1999-09-21 | Mitsubishi Denki Kabushika Kaisha | Seal ring |
GB2310250A (en) * | 1996-02-17 | 1997-08-20 | Bosch Gmbh Robert | Fuel injection valve for internal combustion engines |
US20070228662A1 (en) * | 2003-08-22 | 2007-10-04 | Ferdinand Reiter | Compensating Element for a Fuel Injector |
DE102011003957A1 (de) * | 2011-02-10 | 2012-08-16 | Elringklinger Ag | Dichtelement |
Also Published As
Publication number | Publication date |
---|---|
EP4323634A1 (fr) | 2024-02-21 |
CN117203421A (zh) | 2023-12-08 |
FR3121715A1 (fr) | 2022-10-14 |
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