[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.
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.
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.
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.