HOLDING MEMBER FOR FUEL INJECTION VALVE

Description

[0001] The present invention relates to a fuel injection relates and to a retaining member for a fuel injection valve according to the preamble part of claim 1.

BACKGROUND ART

[0002] A fuel injection valve and a retaining member for a fuel injection valve of the generic kind are known from JP 2000-54937 A.

DISCLOSURE OF THE INVENTION

PROBLEMS TO BE SOLVED BY THE INVENTION

[0003] Since in a conventional retaining member for a fuel injection valve, a mounting boss is provided to protrude on an outer peripheral surface corresponding to a fitting surface of a cap portion, there is the possibility of occurrence of strain on the fitting surface of the cap portion due to the influence of thermal shrinkage of the mounting boss portion during its molding, and depending on the occurrence of the strain, reliability of liquid tightness of a fitting portion of a fuel inlet portion of a fuel injection valve and the cap portion is lost.

[0004] It is an object of the present invention to provide a fuel injection valve and a retaining member for a fuel inj ection valve capable of securing high liquid tightness of a fitting portion of a fuel inlet portion of the fuel injection valve and a cap portion of the retaining member.

MEANS FOR SOLVING THE PROBLEMS

[0005] In order to attain the above object, according to a first feature of the present invention, there is provided a fuel injection valve and a retaining member for a fuel injection valve according to claim 1.

[0006] It should be noted here that the intake passage member corresponds to a throttle body 1 in the embodiment of the present invention which will be described below.

[0007] According to a second feature of the present invention, in addition to the first feature, the pair of mounting boss portions are disposed so that axes of both the mounting boss portions are on two vertexes of a virtual triangle with an axis of the cap portion as the remaining one vertex of the virtual triangle in the plane view of the retaining member, and the fuel joint portion is disposed in a range of a vertically opposite angle with respect to a vertical angle of the triangle on the axis side of the cap portion.

[0008] According to a third feature of the present invention, in addition to the second feature, a power receiving coupler which is provided to protrude at an outer peripheral portion of the fuel injection valve is disposed in the range of the vertically opposite angle.

[0009] According to a fourth feature of the present invention, in addition to the second feature, the vertical angle is set to be an obtuse angle.

[0010] According to a fifth feature of the present invention, in addition to the second feature, distances to the respective mounting boss portions from the axis of the cap portion are set to be substantially equal.

[0011] According to a sixth feature of the present invention, in addition to the third feature, an angle which is formed by a center line of the fuel joint portion and a center line of the power receiving coupler is set at 50° or more.

EFFECT OF THE INVENTION

[0012] According to the first feature of the present invention, with regard to a retaining member which retains in an intake passage member an exclusively single fuel injection valve, the mounting boss portion is connected to the cap portion at the region which is away in an axial direction from the fitting surface to the fuel inlet portion, on the inner periphery of the cap portion, and therefore, even if thermal shrinkage occurs to the mounting boss portion during molding of the retaining member, its influence is not exerted on the fitting surface. Therefore, the favorable fitting surface without strain can be always secured, and therefore, the fitting surface and the fuel inlet portion which is fitted on the fitting surface via the seal ring are always kept in the favorably sealed state, and leak of the high-pressure fuel can be reliably prevented.

[0013] In addition, a pair of mounting boss portions and one fuel joint portion are disposed in a dispersed manner around the cap portion, and therefore, when a fuel supply pipe is attached to and detached from the fuel joint portion in the state in which the retaining member is mounted to the throttle body during maintenance, the load exerted on the fuel joint portion can be dispersed to both the mounting boss portions via the cap portion with good balance, whereby both the mounting boss portions, and thus the retaining member can be made compact and light.

[0014] Furthermore, the rigidity of a connecting part between the cap portion and the mounting boss portion is made lower than rigidity of the cap portion, and therefore, when attaching and detaching of the fuel supply pipe to and from the fuel joint portion, and attaching and detaching of the power supplying coupler to and from the power receiving coupler are performed during maintenance, if a large load is applied to the cap portion, the thin connecting portion moderately bends, whereby an excessive load can be prevented from being applied to the fitting portion of the fuel inlet portion of the fuel injection valve 10 and the cap portion, and therefore, strain of the fitting portion is avoided to make it possible to prevent leakage of the fuel.

[0015] According to the second feature of the present invention, the pair of mounting boss portions and one fuel joint portion are disposed in a dispersed manner around the cap portion 21, and when the fuel supply pipe is attached to and detached from the fuel joint portion in the state in which the retaining member is mounted to the intake passage member during maintenance, the attachment and detachment can be easily performed without interference of the other components, in addition to which, the load exerted on the fuel joint portion can be dispersed to and supported by both the mounting boss portions via the cap portion with good balance. Therefore, this can contribute to downsizing and reduction in weight of both the mounting boss portions and thus the retaining member.

[0016] According to the third feature of the present invention, the power receiving coupler of the fuel injection valve is also disposed in the range of the vertically opposite angle, and therefore, when the power supplying coupler is attached to and detached from the power receiving coupler in the state in which the fuel injection valve is retained in the intake passage member with the retaining member during maintenance, the load exerted on the fuel injection valve can be dispersed to and supported by both the mounting boss portions via the cap portion with good balance, which also contributes to downsizing and reduction in weight of both the mounting boss portions and thus the retaining member.

[0017] According to the fourth feature of the present invention, when the fuel supply pipe is attached to and detached from the fuel joint portion, the load exerted on the fuel joint portion can be dispersed to and supported by both the mounting boss portions via the cap portion with better balance, and when the power supplying coupler is attached to and detached from the power receiving coupler, the load exerted on the fuel injection valve can be dispersed to and supported by both the mounting boss portions via the cap portion with better balance.

[0018] According to the fifth feature of the present invention, the respective mounting boss portions support the cap portion stably under substantially the same conditions, which can contribute to downsizing and reduction in weight of the retaining member.

[0019] According to the sixth feature of the present invention, attaching and detaching of the fuel supply pipe to and from the fuel joint portion, and attaching and detaching of the power supplying coupler to and from the power receiving coupler can be facilitated without interference with one another during maintenance, which can contribute to enhancement of assemblability.

[0020] The above and other objects, features and advantages of the invention will become apparent from the following description of the preferred embodiment taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 

[FIG. 1] FIG. 1 is a plane view showing a state in which a fuel injection valve is mounted to a throttle body of an engine by using a retaining member.

[FIG. 2] FIG. 2 is a sectional view taken on line 2-2 in FIG. 1.

[FIG. 3] FIG. 3 is a view seen along the arrow 3 in FIG. 1

[FIG. 4] FIG. 4 is a bottom view of the retaining member.

[FIG. 5] FIG. 5 is a sectional view taken on line 5-5 in FIG. 4.

[FIG. 6] FIG. 6 is a view seen along the arrow 6 in FIG. 4

[FIG. 7] FIG. 7 is a sectional view showing a preferred embodiment of the present invention.

[0022] 

EXPLANATION OF REFERENCE NUMERALS AND SYMBOLS

1	intake passage member (throttle body)
4	mounting hole
10	fuel injection valve
11	fuel injection portion
12	fuel inlet portion
14	power receiving coupler
20	retaining member
21	cap portion
22	fitting surface
26	mounting boss portion
27	fuel joint portion
28'	thin connecting portion
30	virtual triangle
33	fuel supply pipe
34	power supplying coupler
A	axis of the mounting boss portion
B	axis of the cap portion
C	center line of the fuel joint portion
D	center line of the power receiving coupler
α	vertical angle of the triangle 30 on the axis side of the cap portion
β	vertically opposite angle
θ	angle formed by the center lines C and D

[0023] In FIGS. 1 to 3, a throttle body 1 as an intake passage member of an engine has an intake path 2 which connects to an intake port of the engine not shown, and a valve shaft 3a of a butterfly type throttle valve 3 which regulates an intake amount of the engine by opening and closing the intake path 2 is rotatably supported by the throttle body 1. A mounting hole 4 which opens to the intake path 2 not shown and a mounting seat 5 which extends in a radial direction from a peripheral edge of an outer end of the mounting hole 4 are formed at a side wall of the throttle body 1 at a downstream side from the throttle valve 3.

[0024] Meanwhile, a single electromagnetic fuel injection valve 10 which is mounted to the throttle body 1 has a fuel injection portion 11 at one end thereof and a fuel inlet portion 12 at the other end. An outer shell 13 of a synthetic resin which is molded to embed a coil portion of an inside is formed at an outer periphery of an intermediate portion between the fuel injection portion 11 and the fuel inlet portion 12, and a power receiving coupler 14 which protrudes to one side of the outer shell 13 is integrally formed at the outer shell 13.

[0025] A cushion ring 15 of rubber having a sealing function is fitted on an outer periphery of a root of the fuel injection portion 11 to abut to an end surface of the outer shell 13. An O-ring 17 as a seal member is fitted to an annular seal groove 16 formed on an outer periphery of the fuel inlet portion 12.

[0026] The fuel injection portion 11 of the fuel injection valve 10 is inserted into the mounting hole 4 of the throttle body 1, and the cushion ring 15 is overlaid on the mounting seat 5. The fuel injection valve 10 is retained by a retaining member 20 of a synthetic resin to compress the cushion ring 15. In other words, the retaining member 20 retains the exclusively single electromagnetic fuel injection valve 10.

[0027] The retaining member 20 will be described by referring to FIG. 1 and FIGS. 4 to 6.

[0028] The retaining member 20 includes a cylindrical cap portion 21 as a main body. An inner peripheral surface of the cap portion 21 is formed by a cylindrical fitting surface 22, and a tapered guide surface 23 which is formed at an inlet side of the fitting surface 22. The fuel inlet portion 12 of the fuel injection valve 10 is fitted in the fitting surface 22 through the guide surface 23, and the O-ring 17 is in close contact with the fitting surface 22.

[0029] A stopper step 24 which extends inward in the radial direction from an inner end of the fitting surface 22, and a recess 25 which is located at a center portion of the stopper step 24 to open to the fitting surface 22 side are formed at a ceiling portion 21a of the cap portion 21, so that an end surface of the fuel inlet portion 12 abuts to the stopper step 24 to restrict insertion depth of the fuel inlet portion 12 into the cap portion 21.

[0030] A pair of cylindrical mounting boss portions 26, 26 which protrude to an outside of the ceiling portion 21a, and a tubular fuel joint portion 27 are integrally formed at the ceiling portion 21a. Both the mounting boss portions 26, 26 are disposed so that their axes A, A are parallel with an axis B of the cap portion 21, and are connected to the ceiling portion 21a of the cap portion 21 via a relatively thin plate-shaped connecting portion 28. Apart of the tubular fuel joint portion 27 becomes a bulged portion 27a of a top surface of the ceiling portion 21a to protrude to one side of the ceiling portion 21a, and an inside of the fuel joint portion 27 communicates with the recess 25 of the inner surface of the ceiling portion 21a. Ribs 29, 29 which connect the bulged portion 27a and the respective mounting boss portions 26 are formed between the bulged portion 27a and the respective mounting boss portions 26.

[0031] In this manner, a pair of mounting boss portions 26, 26 are connected to the ceiling portion 21a of the cap portion 21 at regions away from the fitting surface 22 in an axial direction. These mounting boss portions 26, 26 are disposed so that both of their axes A, A are on two vertexes of a virtual triangle 30 with the axis B of the cap portion 21 as the remaining one vertex of the virtual triangle 30 in the plane view of the retaining member 20. On this occasion, distances between the axes A of the respective mounting boss portions 26 and the axis B of the cap portion 21 are set to be substantially equal. A vertical angle α of the triangle 30 at the side of the axis B of the cap portion 21 is set to be an obtuse angle. The fuel joint portion 27 is disposed in the range of a vertically opposite angle β with respect to the vertical angle α. As shown in FIG. 1, when the retaining member 20 is fitted to the fuel injection valve 10, the position in the rotating direction of the fuel injection valve 10 is restricted so that the power receiving coupler 14 of the fuel injection valve 10 is within the range of the vertically opposite angle β.

[0032] The retaining member 20 formed of the cap portion 21, the mounting boss portions 26, 26, and the fuel joint portion 27 as described above is formed of a synthetic resin by molding, a metal bush 31 is press-fitted in or mold-connected to an inner peripheral surface of each of the mounting boss portions 26. The mounting boss portions 26, 26 are fixed to the throttle body 1 by bolts 35, 35, respectively. A positioning protrusion 32 is integrally provided to protrude at an outer peripheral surface of the cap portion 21. With this positioning protrusion 32 as a reference, the position of the power receiving coupler 14 of the fuel injection valve 10 is restricted, and by the restriction, the fuel joint portion 27 and the power receiving coupler 14 are disposed so that an angle θ formed by center lines C and D of them becomes 50° or more.
Thus, a fuel supply pipe 33 which connects to a discharge port of a fuel pump not shown is connected to the fuel joint portion 27, and a power supplying coupler 34 is connected to the power receiving coupler 14.

[0033] On mounting the fuel injection valve 10 to the throttle body 1, the fuel inlet portion 12 of the fuel injection valve 10 is forced into the cap portion 21 of the retaining member 20 until an end surface of the fuel inlet portion 12 abuts to the stopper step 24, and the O-ring 17 is brought into close contact with the fitting surface 22. Then, with the positional relationship of the power receiving coupler 14 of the fuel injection valve 10 and the mounting boss portions 26, 26 of the retaining member 20 set as described above, the fuel injection portion 11 of the fuel injection valve 10 is inserted into the mounting hole 4 of the throttle body 1, and the cushion ring 15 is placed on the mounting seat 5. Next, the mounting boss portions 26, 26 are fixed to predetermined positions of the throttle body 1 with the bolts 35, 35.

[0034] Thus, the fastening force of the mounting boss portions 26, 26 to the throttle body 1 by the bolts 35, 35 acts on the cushion ring 15 as the compression force via the fuel injection valve 10 from the stopper step 24 of the cap portion 21, and the fuel injection valve 10 is elastically supported by the repulsive force to the compression force.

[0035] During operation of the engine, the high pressure fuel which the fuel pump not shown discharges is supplied to the fuel injection valve 10 through the fuel joint portion 27 of the retaining member 20 from the fuel supply pipe 33, and is injected to the intake port of the engine from the fuel injection portion 11 at a valve opening time of the valve 10.

[0036] Since in the retaining member 20 of the synthetic resin, a pair of the mounting boss portions 26, 26 are connected to the regions, of the cap portion 21, which are away in the axial direction from the fitting surface 22, to which the fuel inlet portion 12 of the fuel injection valve 10 is fitted, even if thermal shrinkage occurs to the mounting boss portions 26, 26 during molding of the retaining member 20, its influence is not exerted on the fitting surface 22, and therefore, the favorable fitting surface 22 without strain can be always secured. Therefore, the fitting surface 22 and the fuel inlet portion 12 which is fitted to the fitting surface 22 via the O-ring 17 are always kept in a favorable sealed state, and a leak of the high pressure fuel can be reliably prevented.

[0037] Especially since both the mounting boss portions 26, 26 are connected to the ceiling portion 21a of the cap portion 21 via the plate-shaped connecting part 28, the influence of the thermal shrinkage of both the mounting boss portions 26, 26 on the fitting surface 22 can be effectively blocked in the plate-shaped connecting part 28. In addition, since the mounting boss portions 26, 26 are connected to a part of the fuel joint portion 27 which is the bulged portion 27a of the upper surface of the ceiling portion 21a of the cap portion 21 via the ribs 29, 29, the connection strength of both the mounting boss portions 26, 26 and the ceiling portion 21a is enhanced, and the fuel injection valve 10 can be firmly retained.

[0038] Since both the mounting boss portions 26, 26 in the plane view of the retaining member 20 are disposed so that both their axes A, A are on two vertexes of the triangle 30 with the axis B of the cap portion 21 as the remaining one vertex of the triangle 30, and the fuel joint portion 27 is disposed in the range of the vertically opposite angle β with respect to the vertical angle α of the triangle 30 on the axis B side of the cap portion 21, a pair of mounting boss portions 26, 26 and one fuel joint portion 27 are disposed in a dispersed manner around the cap portion 21, and when the fuel supply pipe 33 is attached to and detached from the fuel joint portion 27 in the state in which the retaining member 20 is mounted to the throttle body 1 during maintenance, the attaching and detaching can be facilitated without interference of the other components, and moreover, the load exerted on the fuel joint portion 27 can be dispersed to and supported by both the mounting boss portions 26, 26 via the cap portion 21 with good balance. Since the power receiving coupler 14 of the fuel injection valve 10 is also disposed in the range of the vertically opposite angle β, when the power supplying coupler 34 is attached to and detached from the power receiving coupler 14 in the state in which the fuel injection valve 10 is retained in the throttle body 1 with the retaining member 20, during maintenance, the load exerted on the fuel injection valve 10 is dispersed to and supported by both the mounting boss portions 26, 26 via the cap portion 21 with good balance. Thereby, both the mounting boss portions 26, 26, and thus the retaining member 20 can be made compact and light. Such an effect is made further remarkable by especially setting the vertical angle α to be an obtuse angle.

[0039] By setting the distances between the axes A of the respective mounting boss portions 26 and the axis B of the cap portion 21 substantially equal, the respective mounting boss portions 26 can stably support the cap portion 21 under substantially the same conditions, which can also contribute to downsizing and reduction in weight of the retaining member 20.

[0040] Since the fuel joint portion 27 of the retaining member 20 and the power receiving coupler 14 of the fuel injection valve 10 are disposed so that the angle θ which is formed by their center lines C and D becomes 50° or more, during maintenance, attaching and detaching of the fuel supply pipe 33 to and from the fuel joint portion 27, and attaching and detaching of the power supplying coupler 34 to and from the power receiving coupler 14 can be easily performed without interference with one another, which can contribute to enhancement of assemblability.

[0041] Next, a preferred embodiment of the present invention shown in FIG. 7 will be described.

[0042] In this embodiment, in the retaining member 20 of a synthetic resin, a pair of mounting boss portions 26, 26 are connected to the peripheral edge of the opening of the guide surface 23 of the cap portion 21 via a connecting part 28' which is thinner than the cap portion 21, and these mounting boss portions 26, 26 are disposed with small spaces at the sides of the cap portion 21. The other construction is the same as that shown in Figs. 1-6, previous embodiment, and therefore, the redundant explanation will be omitted by assigning the same reference numerals and symbols to the parts corresponding to those shown in Figs 1-6.

[0043] In the preferred embodiment, even if thermal shrinkage occurs to the mounting boss portions 26, 26 during molding of the retaining member 20 of the synthetic resin, the influence of the thermal shrinkage of both the mounting boss portions 26, 26 on the fitting surface 22 in the cap portion 21 can be blocked by the thin connecting portion 28', and the favorable fitting surface 22 without strain can be always secured as in the setup shown in Figs. 1-6.

[0044] The thin connecting portion 28' which connects the cap portion 21 and the mounting boss portions 26, 26 is lower in rigidity than the cap portion 21, and therefore, when attaching and detaching of the fuel supply pipe 33 to and from the fuel joint portion 27 and attaching and detaching of the power supplying coupler 34 to and from the power receiving coupler 14 are performed during maintenance, if a large load is applied to the cap portion 21, the connecting part 28' moderately bends, whereby an excessive load can be prevented from being applied to the fitting portion of the fuel inlet portion 12 of the fuel injection valve 10 and the cap portion 21, and therefore, strain of the fitting portion is avoided to make it possible to prevent the leak of the fuel.

[0045] Although the embodiment of the present invention has been described in detail, it will be understood that the present invention is not limited to the above-described embodiment, and various modifications in design may be made without departing from the subject matter of the invention defined in the claims.

Claims

1. A fuel injection valve and a retaining member for a fuel injection valve which retains in an intake passage member (1) an exclusively single fuel injection valve (10) having a fuel injection portion (11) at one end thereof inserted in a mounting hole (4) provided in the intake passage member (1), and comprises a cap portion (21), a fuel joint portion (27) and a mounting boss portion (26) which are integrally formed of a synthetic resin by molding so as to integrally connect the fuel joint portion (27) and the mounting boss portion (26) to the cap portion (21) which is liquid-tightly fitted on an outer periphery of a fuel inlet portion (12) at the other end of the fuel injection valve (10), the mounting boss portion (26) being connected to the intake passage member (1), the fuel joint portion (27) having an interior communicating with an inside of the cap portion (21),
wherein an inner peripheral surface of the cap portion (21) is formed by a cylindrical fitting surface (22);
a seal member (17) is fitted on an outer periphery of the fuel inlet portion (12) and the fuel inlet portion (12) is fitted in the fitting surface (22) and the seal member (17) is in close contact with the fitting surface (22);
said retaining member (20) is a single retaining member for retaining said single fuel injection valve (10) and has a connecting part (28') connecting between the cap portion (21) and the mounting boss portion (26); and the connecting part (28') is connected to the cap portion (21) at a region of an inner periphery of the cap portion (21), which is away in an axial direction from the fitting surface (22) to the fuel inlet portion (12);
characterized in that
the connecting part (28') is thinner than the wall thickness of the cap portion (21) to make the rigidity of said connecting part (28') lower than the rigidity of the cap portion (21) and in that the mounting boss portion (26) is configured as a pair of mounting boss portions (26, 26),
wherein the pair of mounting boss portions (26, 26) and the fuel joint portion (27) are disposed in a dispersed manner around the cap portion (21).

2. A fuel injection valve and a retaining member for a fuel injection valve according to claim 1,
wherein the pair of mounting boss portions (26, 26) are disposed so that axes (A) of both the mounting boss portions (26, 26) are on two vertexes of a virtual triangle (30) with an axis (B) of the cap portion (21) as the remaining one vertex of the virtual triangle (30) in the plane view of the retaining member (20), and the fuel joint portion (27) is disposed in a range of a vertically opposite angle (β) with respect to a vertical angle (α) of the triangle (30) on the axis (B) side of the cap portion (21).

3. A fuel injection valve and a retaining member for a fuel injection valve according to claim 2,
wherein a power receiving coupler (14) which is provided to protrude at an outer peripheral portion of the fuel injection valve (10) is disposed in the range of the vertically opposite angle (β).

4. A fuel injection valve and a retaining member for a fuel injection valve according to claim 2,
wherein the vertical angle (α) is set to be an obtuse angle.

5. A fuel injection valve and a retaining member for a fuel injection valve according to claim 2,
wherein distances to the respective mounting boss portions (26, 26) from the axis (B) of the cap portion (21) are set to be substantially equal.

6. A fuel injection valve and a retaining member for a fuel injection valve according to claim 3,
wherein an angle (θ) which is formed by a center line (C) of the fuel joint portion (27) and a center line (D) of the power receiving coupler (14) is set at 50° or more.

Ansprüche

1. Kraftstoffeinspritzventil und Halteelement für ein Kraftstoffeinspritzventil, das in einem Einlasskanalelement (1) ausschließlich ein einzelnes Kraftstoffeinspritzventil (10) hält, das an seinem einen Ende einen Kraftstoffeinspritzabschnitt (11) aufweist, der in ein im Einlasskanaielement (1) vorgesehenes Montageloch (4) eingesetzt ist, und einen Kap- z penabschnitt (21), einen Kraftstoffanschlussabschnitt (27) und einen Montagenabenabschnitt (26) aufweist, die einstückig aus Kunstharz durch Abformung geformt sind, um den Kraftstoffanschlussabschnitt (27) und den Montagenabenabschnitt (26) einstückig mit dem Kappenabschnitt (21) zu verbinden, der flüssigkeitsdicht auf einem Außenumfang eines Kraftstoffeinlassabschnitts (12) am anderen Ende des Kraftstoffeinspritzventils (10) sitzt, wobei der Montagenabenabschnitt (26) mit dem Einlasskanalelement (1) verbunden ist, der Kraftstoffanschlussabschnitt (27) einen Innenraum aufweist, der mit einer Innenseite des Kappenabschnitts (21) in Verbindung steht,
worin eine Innenumfangsoberfläche des Kappenabschnitts (21) durch eine zylindrische Sitzoberfläche (22) gebildet ist;
ein Dichtungselement (17) auf einem Außenumfang des Kraftstoffeinlassabschnitts (12) sitzt und der Kraftstoffeinlassabschnitt (12) in die Sitzfläche (22) eingesetzt ist und das Dichtungselement (17) mit der Sitzoberfläche (22) in engem Kontakt steht;
wobei das Halteelement (20) ein einzelnes Halteelement ist, um das einzelne Kraftstoffeinspritzventil (10) zu halten, und ein Verbindungsteil (28') aufweist, das zwischen dem Kappenabschnitt (21) und dem Montagenabenabschnitt (26) angeschlossen ist; und das Verbindungsteil (28') mit dem Kappenabschnitt (21) an einem Innenumfangsbereich des Kappenabschnitts (21) verbunden ist, der in axialer Richtung von der Sitzoberfläche (22) zum Kraftstoffeinlassabschnitt (12) axial entfernt ist,
dadurch gekennzeichnet, dass
das Verbindungsteil (28') dünner ist als die Wanddicke des Kappenabschnitts (21), um die Steifigkeit des Verbindungsteils (28') geringer zu machen als die Steifigkeit des Kappenabschnitts (21), und dass der Montagenabenabschnitt (26) als ein Paar von Montagenabenabschnitten (26, 26) konfiguriert ist,
worin das Paar der Montagenabenabschnitte (26, 26) und der Kraftstoffanschlussabschnitt (27) um den Kappenabschnitt (21) herum verteilt angeordnet sind.

2. Kraftstoffeinspritzventil und Halteelement für ein Kraftstoffeinspritzventil nach Anspruch 1,
worin das Paar von Montagenabenabschnitten (26, 26) so angeordnet ist, dass Achsen (A) beider Montagenabenabschnitte (26, 26) auf zwei Scheiteln eines virtuellen Dreiecks (30) angeordnet sind, wobei, in Draufsicht des Halteelements (20), eine Achse (B) des Kappenabschnitts (21) der eine restliche Scheitel des virtuellen Dreiecks (30) ist,
und der Kraftstoffanschlussabschnitt (27) in einem Bereich eines vertikal gegenüberliegenden Winkels (β) in Bezug auf einen vertikalen Winkel (α) des Dreiecks (30) auf der Seite der Achse (B) des Kappenabschnitts (21) angeordnet ist.

3. Kraftstoffeinspritzventil und Halteelement für ein Kraftstoffeinspritzventil nach Anspruch 2,
worin eine Stromaufnahmekupplung (14), die an einem Außenumfangsabschnitt des Kraftstoffeinspritzventils (10) vorsteht, in dem Bereich des vertikal gegenüberliegenden Winkels (β) angeordnet ist.

4. Kraftstoffeinspritzventil und Halteelement für ein Kraftstoffeinspritzventil nach Anspruch 2, worin der vertikale Winkel (α) auf einen stumpfen Winkel gesetzt ist.

5. Kraftstoffeinspritzventil und Halteelement für ein Kraftstoffeinspritzventil nach Anspruch 2, worin Abstände von der Achse (B) des Kappenabschnitts (21) zu den jeweiligen Montagenabenabschnitten (26, 26) so gesetzt sind, dass sie im Wesentlichen gleich sind.

6. Kraftstoffeinspritzventil und Halteelement für ein Kraftstoffeinspritzventil nach Anspruch 3, worin ein Winkel (α), der durch eine Mittelline (C) des Kraftstoffanschlussabschnitts (27) und eine Mittellinie (D) der Stromaufnahmekupplung (14) gebildet ist, auf 50° oder mehr gesetzt ist.

Revendications

1. Soupape d'injection de carburant et support pour soupape d'injection de carburant qui supporte dans un élément de passage d'admission (1) une soupape d'injection de carburant exclusive unique (10) comprenant une partie d'injection de carburant (11) à une extrémité de celle-ci insérée dans un trou de montage (4) prévu dans l'élément de passage d'admission (1), et comprenant une partie de couvercle (21), une partie de joint de carburant (27) et une partie de bosse de montage (26) qui sont formées intégralement à partir d'une résine synthétique par moulage de manière à connecter intégralement la partie de joint de carburant (27) et la partie de bosse de montage (26) à la partie de couvercle (21) qui est agencée de façon étanche au liquide sur une périphérie extérieure d'une partie d'entrée de carburant (12) à l'autre extrémité de la soupape d'injection de carburant (10), la partie de bosse de montage (26) étant connectée à l'élément de passage d'admission (1), l'intérieur de la partie de joint de carburant (27) communiquant avec l'intérieur de la partie de couvercle (21),
dans laquelle une surface périphérique intérieure de la partie de couvercle (21) est formée par une surface de raccordement cylindrique (22);
un élément de joint (17) est agencé sur une périphérie extérieure de la partie d'entrée de carburant (12), et la partie d'entrée de carburant (12) est agencée dans la surface de raccordement (22), et l'élément de joint (17) est en contact intime avec la surface de raccordement (22);
ledit support (20) est un support unique pour supporter ladite soupape d'injection de carburant unique (10), et comprend une partie de connexion (28') qui établit une connexion entre la partie de couvercle (21) et la partie de bosse de montage (26), et la partie de connexion (28') est connectée à la partie de couvercle (21) à une région d'une périphérie intérieure de la partie de couvercle (21) qui est éloignée dans une direction axiale de la surface de raccordement (22) jusqu'à la partie d'entrée de carburant (12);
caractérisée en ce que:

la partie de connexion (28') est plus mince que l'épaisseur de paroi de la partie de couvercle (21) afin de rendre la rigidité de ladite partie de connexion (28') inférieure à la rigidité de la partie de couvercle (21), et en ce que la partie de bosse de montage (26) est configurée comme une paire de parties de bosse de montage (26, 26),

dans laquelle la paire de parties de bosse de montage (26, 26) et la partie de joint de carburant (27) sont disposées d'une façon dispersée autour de la partie de couvercle (21).

2. Soupape d'injection de carburant et support pour soupape d'injection de carburant selon la revendication 1, dans lesquels la paire de parties de bosse de montage (26, 26) est disposée de telle sorte que les axes (A) des deux parties de bosse de montage (26, 26) soient situés sur deux sommets d'un triangle virtuel (30), où un axe (B) de la partie de couvercle (21) constitue le sommet restant du triangle virtuel (30) dans la vue en plan du support (20), et la partie de joint de carburant (27) est disposée dans une gamme d'un angle verticalement opposé (β) par rapport à un angle vertical (α) du triangle (30) sur le côté d'axe (B) de la partie de couvercle (21).

3. Soupape d'injection de carburant et support pour soupape d'injection de carburant selon la revendication 2, dans lesquels un coupleur de réception de puissance (14) qui est prévu de manière à faire saillie à une partie périphérique extérieure de la soupape d'injection de carburant (10) est disposé dans la gamme de l'angle verticalement opposé (β).

4. Soupape d'injection de carburant et support pour soupape d'injection de carburant selon la revendication 2, dans lesquels l'angle vertical (α) est réglé de manière à être un angle obtus.

5. Soupape d'injection de carburant et support pour soupape d'injection de carburant selon la revendication 2, dans lesquels les distances jusqu'aux parties de bosse de montage respectives (26, 26) à partir de l'axe (B) de la partie de couvercle (21) sont réglées de manière à être sensiblement égales.

6. Soupape d'injection de carburant et support pour soupape d'injection de carburant selon la revendication 3, dans lesquels un angle (α) qui est formé par une ligne centrale (C) de la partie de joint de carburant (27) et une ligne centrale (D) du coupleur de réception de puissance (14) est réglé à 50°, ou plus.

Drawing