CN102180433B - Fuel injection system - Google Patents

Fuel injection system Download PDF

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Publication number
CN102180433B
CN102180433B CN2010106227858A CN201010622785A CN102180433B CN 102180433 B CN102180433 B CN 102180433B CN 2010106227858 A CN2010106227858 A CN 2010106227858A CN 201010622785 A CN201010622785 A CN 201010622785A CN 102180433 B CN102180433 B CN 102180433B
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China
Prior art keywords
adaptor union
fuel
protrusion
fuel pipe
connection body
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CN102180433A (en
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关原敦史
加藤哲史
三吉启司
平松义也
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Toyoda Gosei Co Ltd
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Toyoda Gosei Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies

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  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

The invention discloses a fuel injection system (FS), which comprises an oiling port (20), a pipe joint part (23) and a fuel pipe (50) equipped with a conductive layer for being connected with the pipe joint part (23). The pipe joint part comprises a connection body (25), a disengaging protruding part (26) connected with the outer circumferential surface of the connection body (25) so as to be ring-shaped with the external diameter thereof greater than the inner diameter of the fuel pipe and a grounding connection part (31). The grounding connection part equipped with a fastening part (32) is arranged on the outer circumferential surface of the connection body so as to be protruded with an L-shaped cross-section thereof. An insertion gap (31s) is between the grounding connection part and the outer circumferential surface of the connection body is defined. The fastening part (32) is equipped with a connection protruding part (32b). The end portion of the pipe joint end (51) is allowed to pass through the disengaging protruding part (26). The pipe joint end (51) is pressed to be arranged on the connection body (25) so as to be fit into the insertion gap. Therefore, the connection protruding part is electrically connected with the external layer of the pipe joint end.

Description

Fuel filling system
Technical field
The present invention relates to a kind of fuel filling system, be used for injecting fuel oil to the fuel tank of self-propelled vehicle etc., more specifically, the present invention relates to utilize the conducting parts of self-propelled vehicle that human body grounding is set, thereby, when opening or closing the operation of fuel tank locking cap (fuel filler cap), can reach the purpose that discharges human body institute static electrification by fuel pipe.
Background technology
Usually, as such fuel filling system, known a kind of mechanism, fuel oil injects fuel tank by the resin fuel pipe, and the resin fuel pipe is connected with oil filling port (filler neck).In such mechanism, need there be a kind of human body for the operation oiling that the mechanism of ground connection is provided, by the conductive component that is arranged on the vehicle body human body institute static electrification is released into body side, grips fuel tank locking cap to open or to produce when closing fuel tank locking cap uncomfortable sensation to avoid the operator.About such grounding path, known a kind of structure by the metal filament that is connected with oil filling port, makes fuel tank locking cap be connected with body-side member.Yet, in this conventional structure, the complicated and trouble of the erection work of grounded metal silk.In addition, owing to adopt the metal connection end, can run into the problem of getting rusty.
On the other hand, known a kind of technology is constructed grounding path (JP-A-11-118073) by formed the fuel filler pipe skin by conductive rubber.Yet, this structure applications when the resin fuel filler pipe, is required to guarantee and being electrically connected of oil filling port.
Summary of the invention
Consider the problems referred to above that prior art exists, one object of the present invention is to provide a kind of fuel filling system, and it can utilize the resin fuel filler pipe that grounding path is set conveniently, reliably.
The present invention has considered solution at least a portion problem, and the present invention can following form maybe should be used for realizing.
[Application Example 1]
According to Application Example 1, a kind of fuel filling system is provided, it has the oil filling port that electroconductive resin forms, and have adaptor union portion and be connected to the fuel pipe of adaptor union portion, and has a conductive layer that is formed by electroconductive resin at skin, conductive layer constitutes by the grounding path of oil filling port to fuel pipe, and wherein, adaptor union portion comprises:
Connect body, it forms fuel gallery, and the adaptor union end of fuel pipe can be plugged in this connections body, reaches the far-end near-end of predetermined length apart that is connected body with this;
Anti-detachment protrusion is arranged at the outer peripheral face that connects body, becomes ring-type thereby give prominence to, and its external diameter is greater than the internal diameter of fuel pipe; And,
The ground connection connecting portion has clinching portion, be set to from the outer peripheral face that connects body, give prominence to from near-end, become and have the roughly configuration in L shaped cross section, and limit itself and connect insertion gap between the outer peripheral face of body, cross over anti-detachment protrusion with the terminal part that allows the adaptor union end, therefore press-fit to enter with force fit thereon and insert the gap, make the ground connection connecting portion be suitable for being electrically connected the outer peripheral face of adaptor union end, and wherein
Clinching portion has basal plane and is connected protrusion, basal plane limits the radial height of inserting the gap, make this radial height be equal to or less than the end thickness of adaptor union end, and the connection protrusion that is arranged at basal plane is outstanding dwindling a part of inserting the gap from basal plane, thereby is pressed into the skin of adaptor union end.
According to the fuel filling system of Application Example 1, be press fit in the adaptor union portion by the ground connection connecting portion at part place fuel pipe, can guarantee the electrical connection at this place like this.Just, when the adaptor union end with fuel pipe is positioned in the adaptor union portion, the anti-detachment protrusion inwall of adaptor union end of nipping, thus stop fuel pipe to break away from from adaptor union portion.At the state that stops fuel pipe to come off, the end of ground connection connecting portion holding tube tip side, the end of adaptor union end are force-fitted in the insertion gap that is defined between clinching portion and the connection body outer peripheral face.Simultaneously, connect protrusion and be formed in the clinching portion of ground connection connecting portion, sting the skin of inlet pipe tip side by means of connecting protrusion, guarantee thus to be electrically connected.When in the oil-feed port that grease compressor grease is inserted oil filling port by grounding path, human body institute static electrification can discharge rapidly.
Owing to utilize fuel pipe that grounding path is provided, can save and must between oil filling port and body-side member, arrange ground path, make the structure of grounding path and attended operation more simple and convenient thus.
[Application Example 2-3]
According to Application Example 2, connect protrusion and form the ridge of extending along the direction of insertion of fuel pipe.According to Application Example 3, connect body and have the elongation protrusion, it is formed on the outer peripheral face in the face of the connection body that connects protrusion.By adopting these structures, can further guarantee the electrical connection between grounding path and the adaptor union end skin.
According to Application Example 4, in the position that week upwards separates at a predetermined angle with the ground connection connecting portion, resistance is revolved projection and is arranged on the near-end that connects body, thereby from its outstanding end face with the adaptor union end of nipping.Because the projection end face of adaptor union end of nipping is revolved in resistance, thereby can stop the adaptor union end to rotate.Therefore, resistance is revolved projection and has been reduced the risk that dislocation takes place the connection protrusion that approaches or be fixed in the outer field ground connection connecting portion of adaptor union end, therefore, improves aspect the reliability of electrical connection of grounding path guaranteeing.
Description of drawings
Fig. 1 illustrates the schematic diagram that injects the fuel filling system of fuel oil according to the embodiment of the present invention to fuel tank.
Fig. 2 is the cutaway view of amplification of the part of the oil filling port shown in Fig. 1 and fuel pipe.
Fig. 3 is the axonometric drawing that the connecting bridge between adaptor union portion and the fuel pipe is shown.
Fig. 4 is the semisectional view that the connecting bridge between adaptor union portion and the fuel pipe is shown.
Fig. 5 illustrates the semisectional view that fuel pipe is connected to adaptor union portion state before.
Fig. 6 is near the axonometric drawing of ground connection connecting portion that adaptor union portion is shown.
Fig. 7 is near the cutaway view of ground connection connecting portion that adaptor union portion is shown.
Fig. 8 is cutaway view, illustrates near the ground connection connecting portion of adaptor union portion when observing with the rectangular direction of fuel pipe direction of insertion.
The specific embodiment
(1) schematic construction of fuel filling system FS
Fig. 1 is the schematic diagram that is used for injecting to fuel tank the fuel filling system of fuel oil that illustrates according to embodiment of the present invention.Fuel filling system FS is used to the motor vehicle fuel case to inject fuel oil, and comprises: fuel tank locking cap FC; Oil filling port 20; Fuel pipe 40,50, it is connected in oil filling port 20; Pipe maintaining part PH, it is used for fuel pipe 40,50 is fixed in body-side member (figure omits not shown); And, fuel tank attaching parts (not shown), it is used for making fuel pipe 40,50 end to be connected with fuel tank.Fuel pipe 40 is resin tubes, is formed by polyethylene, and it is connected in fuel tank with oil filling port 20.One end of fuel pipe 40 is set to be suitable for connecting the adaptor union end 41 of oil filling port 20, and its other end is connected in the fuel tank attaching parts, these parts and fuel tank weld together.Fuel pipe 50 is breather pipes, when being used for refueling to fuel tank feasible from fuel tank inside to outside exhaust, and fuel pipe 50 is formed by the multiple-layer laminated resin material that forms.That is, internal layer is formed by polyethylene, and it possesses good fuel oil impermeability, and skin adds carbon by polyethylene and forms, thereby gives electric conductivity.By adopting this structure, when injecting fuel oil to fuel tank, when taking off fuel tank locking cap FC, 20 when injecting fuel oils from grease compressor grease to oil filling port, and fuel oil injects fuel tank by the filling passage that is made of oil filling port 20 and fuel pipe 40.At this moment, fuel pipe 50 allows the fuel-steam in the fuel tank to discharge from fuel tank, thereby fuel oil is added fuel tank smoothly, and fuel pipe 50 also is used as the part of grounding path simultaneously, to eliminate human body institute static electrification.Hereinafter the structure to constituent elements is described.
(2) structure of the constituent elements of fuel filling system FS
(2)-1 oil filling port 20
Fig. 2 is the cutaway view of amplification that the part of oil filling port 20 among Fig. 1 and fuel pipe 40 and fuel pipe 50 is shown.In Fig. 2, oil filling port 20 comprises: oil filling port body 21, and it connects together oil-feed port 21a with fuel-displaced port 21b, and constitutes filling passage 20P, and filling passage 20P constitutes the part of fuel oil injection channel; And, metal erecting device 35, its inboard from oil filling port body 21 extends to the outside, and fuel lid removably is installed in this device.
Oil filling port body 21 is for example to have added the injection-molded parts that the polyethylene of carbon forms by electroconductive resin, and comprises adaptor union portion 22 and 23 in the bottom of these parts.This adaptor union portion 22 is such parts, and it has fuel-displaced port 21b, and this fuel-displaced port connects fuel pipe 40.A plurality of annular protrusion 22a are formed in the adaptor union portion 22, and it struts the adaptor union end 41 of fuel pipe 40, thereby stop fuel pipe 40 to break away from from oil filling port 20.Adaptor union portion 23 is formed in the part of oil filling port body 21 sidepieces, connects fuel pipe 50 on it.A plurality of annular protrusions are formed in the adaptor union portion 23, and it struts the adaptor union end 51 of fuel pipe 50, thereby stop fuel pipe 50 to break away from from oil filling port 20.
Fig. 3 is the axonometric drawing that the connecting bridge between adaptor union portion 23 and the fuel pipe 50 is shown, Fig. 4 is the semisectional view that the connecting bridge between adaptor union portion 23 and the fuel pipe 50 is shown, and Fig. 5 is illustrated in the semisectional view that adaptor union portion 23 is connected state before with fuel pipe 50.In Fig. 3, adaptor union portion 23 comprises: close end 24, and it forms passage; Base portion is connection body 25 cylindraceous, and it forms the flow path that enters the interior week of this connection body 25 from close end 24; Anti-detachment protrusion 26, it is arranged on the peripheral part that connects body 25, and is outstanding from connecting body 25 with ring-type; And projection 34 is revolved in ground connection connecting portion 31 and resistance.Shown in Figure 4 and 5, anti-detachment protrusion 26 comprises first to fourth cyclic lug 26a, 26b, and 26c, and 26d, it is arranged according to the order of sequence successively from the distal side.The first cyclic lug 26a is positioned at the far-end that connects body 25, forms mitriform, and its far-end from connection body 25 is widened gradually on diameter or expanded, and shows the right angle contraction at interior Zhou Fangxiang greatly towards connecting body 25.Thus, in the time of on fuel pipe 50 being press fit into connection body 25, the first cyclic lug 26a helps to arrange fuel pipe 50, and, even unexpected of the extraterrestrial fuel pipe 50 that pulls out, also be not easy to make fuel pipe 50 to come off from connecting body 25.The second cyclic lug 26b position, and forms with the first cyclic lug 26a and separates enough distances more close to the near-end that connects body 25 than the position of the first cyclic lug 26a, to hold O shape circle betwixt.The 3rd cyclic lug 26c and Fourth Ring shape protrusion 26d form than the second cyclic lug 26b more close to the near-end that is connected body 25, and have and the first cyclic lug 26a similar shapes.
Fig. 6 is the axonometric drawing that near the situations ground connection connecting portion 31 of adaptor union portion 23 are shown, and Fig. 7 is near the cutaway view of situation that the ground connection connecting portion 31 of adaptor union portion 23 is shown.Ground connection connecting portion 31 is arranged in the adaptor union portion 23 at the certain position at the place, end of close end 24, to give prominence to and to extend axially from it.Ground connection connecting portion 31 by at itself with connect the adaptor union end 51 that keeps fuel pipe 50 between the outer surface of body 25, constitutes a part of grounding path.Ground connection connecting portion 31 has roughly L shaped cross section, and the part of ground connection connecting portion 31 is inserted gap 31S and is defined between the two facing to the outer peripheral face that connects body 25, and this part constitutes clinching portion 32.Clinching portion 32 has basal plane 32a, is made for the thickness t 1 that the radial height h1 that inserts gap 31S is equal to or less than fuel pipe 50.Fig. 8 is cutaway view, and near the layout of the ground connection connecting portion 31 of adaptor union portion 23 when watching with the rectangular direction of the direction of insertion of fuel pipe 50 is shown.Connect protrusion 32b and be formed on the basal plane 32a of clinching portion 32, it is from the outstanding part of inserting gap 31S with constriction of basal plane 32a.Connecting protrusion 32b forms carinate as what extend in the direction of insertion of fuel pipe 50 in a measure.Inclined surface 32c is formed on the insertion end that connects protrusion 32b, with the wideer space of restriction between Fourth Ring shape protrusion 26d and connection protrusion 32b, thereby is conducive to adaptor union end 51 is injected this insertion gap 31S.On the surface of the connection body 25 of elongation protrusion 25a below being formed at facing to the position that connects protrusion 32b.Connect protrusion 32b and be pressed against the adaptor union end 51 of fuel pipe 50 together with elongation protrusion 25a, thereby reduce the thickness of fuel pipe 50.Thus, connect the nip outer 50a of fuel pipe 50 of protrusion 32b, increasing the area of contact between ground connection connecting portion 31 and the outer 50a, thereby strengthen electrical connection.
As shown in Figure 3, resistance is revolved projection 34 and is formed at adaptor union portion 23.It is a plurality of protrusions that projection 34 is revolved in resistance, and it stops fuel pipe 50 to rotate with respect to adaptor union portion 23.In the present embodiment, formed two resistances in the zone of adaptor union portion 23 and revolved projection 34 (only illustrating 1 among the figure), the corresponding position of revolving projection 34 in the formation resistance does not form ground connection connecting portion 31, thereby is making progress these parts week each other with 120 ° of intervals separately.Resistance is revolved projection 34 and is respectively had the sharp-pointed salient 34a of wedge-like, and the sharp-pointed salient 34a of wedge-like has acute angle at its end.The height that the sharp-pointed salient 34a of wedge-like has is substantially equal to the thickness of fuel pipe 50.By means of the end face of the fuel pipe 50 of nipping, the sharp-pointed salient 34a of wedge-like is suitable for stoping fuel pipe 50 to rotate.
(2)-2 metal erecting device 35
In Fig. 2, the metal erecting device 35 that illustrates is made of metal, it comprises inner cylinder portion 36 and urceolus portion 38, dismantled and assembled mode is equipped with fuel tank locking cap FC on inner cylinder portion 36, grease compressor grease guide portion 37 one modes are formed at the bottom of inner cylinder portion 36, and urceolus portion 38 forms from inner cylinder portion 36 upper bend.Inner cylinder portion 36 has the opening 36a near fuel tank locking cap FC, and has negative thread 36b, and it is used for screwing in the external screw thread FCa on the fuel tank locking cap FC.Grease compressor grease guide portion 37 is by inner cylinder portion 36 undergauges, and is included in the porthole 37a of its underpart, and this porthole 37a is used for fuel oil is inducted into fuel pipe 40 from grease compressor grease.Urceolus portion 38 is tubular spares, and its upper bend from inner cylinder portion 36 forms, with the upper end around oil filling port body 21, and the top that keeps oil filling port body 21.
(3) function of embodiment and advantage
Function and advantage that the structure of the embodiment of the invention provides are described hereinafter.
(3)-1
As shown in Figure 1, 2, in fuel filling system FS, by outer 50a and the pipe maintaining part PH of oil filling port body 21, adaptor union portion 23, ground connection connecting portion 31, fuel pipe 50, grounding path forms from metal erecting device 35 and extends to body-side member.When among the oil-feed port 21a that grease compressor grease is inserted oil filling port 20, human body institute static electrification can discharge rapidly by grounding path.
(3)-2
Along the part place of the grounding path of fuel filling system FS, fuel pipe 50 is press fit in the adaptor union portion 23 by ground connection connecting portion 31, can guarantee the electrical connection at this place like this.That is to say, as shown in Figure 7, when the adaptor union end 51 of fuel pipe 50 is arranged in the adaptor union portion 23, anti-detachment protrusion 26 inwall of adaptor union end 51 of nipping, thus stop adaptor union end 51 to break away from from adaptor union portion 23.At the prevention state that comes off, the end of adaptor union end 51 is force-fitted in the insertion gap 31S of ground connection connecting portion 31, remain in this place by this, and, connecting protrusion 32b is formed in the clinching portion 32, it stings the outer 50a of inlet pipe tip side 51, by this, has increased the area of contact between the two and has guaranteed conduction.
(3)-3
Utilize fuel pipe 50 to obtain grounding path.Therefore, eliminated from oil filling port 20 to body-side member the essentiality of arranging grounding jumper, thus, the structure that makes grounding path is with to be connected work more simple and convenient.
(3)-4
As shown in Figure 8, connect body 25 and have elongation protrusion 25a, in the position facing to connection protrusion 32b, this elongation protrusion 25a is formed at the outer surface that connects body 25.Therefore, can further dwindle in the space that connects between protrusion 32b and the connection body 25, further guarantee to connect the electrical connection between body 25 and the adaptor union end 51 thus.
(3)-5
As shown in Figure 3, resistance revolve projection 34 in circumferential arrangement in a plurality of positions that separate at a predetermined angle with ground connection connecting portion 31, with the end face of the adaptor union end 51 of nipping, thereby stop 51 rotations of adaptor union end.Therefore, resistance is revolved projection 34 and has been reduced the risk that dislocation takes place the connection protrusion 32b of ground connection connecting portion 31 that approaches or be fixed in the outer 50a of adaptor union end 51, therefore, is improved aspect the reliability of electrical connection of grounding path guaranteeing.
(3)-6
Connecting protrusion 32b is arranged in axially with the relative fuel pipe 50 of elongation protrusion 25a.Therefore, the rotation stopping effect is strengthened, and, can not disturb the insertion operation of fuel pipe 50 by any way.
Though the present invention is described according to its particular specific embodiment, but to those skilled in the art, can easily carry out multiple modification and improvement to above-mentioned embodiment, or be applied to other field, and not depart from purpose of the present invention, spirit and scope.All these are changed all in claim scope of the present invention.For example, can adopt following variation.
In the specific embodiment, although grounding path is arranged on the fuel pipe 50 for ventilation, the present invention is not limited to this, and grounding path can also be arranged on for the fuel pipe 40 that adds fuel oil.

Claims (4)

1. fuel filling system, it has the oil filling port (20) that is formed by electroconductive resin, and have adaptor union portion (23) and the fuel pipe (50) that is connected with described adaptor union portion (23), and this fuel pipe (50) has the conductive layer that is formed by electroconductive resin at skin, and be configured to the grounding path of structure from described oil filling port (20) to described fuel pipe (50), wherein
Described adaptor union portion (23) comprising:
Connect body (25), it forms fuel gallery, and the adaptor union end (51) of described fuel pipe (50) can be plugged to this connection body (25);
Anti-detachment protrusion (26), it is arranged at the outer peripheral face of described connection body (25), becomes ring-type with outstanding, wherein, described anti-detachment protrusion (26) inwall of described adaptor union end (51) of nipping, thus stop described adaptor union end (51) to break away from from described adaptor union portion (23); And
Ground connection connecting portion (31), it has clinching portion (32), this ground connection connecting portion (31) is set on the outer peripheral face of described connection body (25) outstanding from described near-end, become and have the roughly configuration in L shaped cross section, and limit insertion gap (31S) between the outer peripheral face of itself and described connection body (25), and, cross over described anti-detachment protrusion (26) by the terminal part that allows described adaptor union end (51), thus, described adaptor union end (51) press-fits in connecting body (25) to press fit in the described insertion gap (31S), make described ground connection connecting portion (31) be suitable for being electrically connected with the outer peripheral face of described adaptor union end (51), and wherein
Described clinching portion (32) has basal plane (32a) and is connected protrusion (32b), described basal plane (32a) limits the radial height in described insertion gap (31S), make it be equal to or less than the end thickness of described adaptor union end (51), and, the described connection protrusion (32b) that is arranged at described basal plane (32a) is given prominence to a part of inserting gap (31S) to dwindle from this basal plane (32a), thereby is pressed into the skin of described adaptor union end (51).
2. fuel filling system according to claim 1, wherein
Described connection protrusion (32b) forms the ridge of extending along the direction of insertion of described fuel pipe (50).
3. fuel filling system according to claim 2, wherein
Described connection body (25) has elongation protrusion (25a), and it is formed at the outer peripheral face of described connection body (25) in the position in the face of described connection protrusion (32b).
4. according to the described fuel filling system of arbitrary claim among the claim 1-3, wherein
In the position that week upwards separates at a predetermined angle with described ground connection connecting portion (31), the near-end that projection (34) is arranged on described connection body (25) is revolved in resistance, thereby from its outstanding end face with the described adaptor union end (51) of nipping.
CN2010106227858A 2009-12-25 2010-12-24 Fuel injection system Active CN102180433B (en)

Applications Claiming Priority (2)

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JP2009-294772 2009-12-25
JP2009294772A JP5321444B2 (en) 2009-12-25 2009-12-25 Fuel supply device

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CN102180433A CN102180433A (en) 2011-09-14
CN102180433B true CN102180433B (en) 2013-08-07

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JP6156184B2 (en) * 2014-02-21 2017-07-05 豊田合成株式会社 Fuel supply device
JP6283912B2 (en) * 2014-03-25 2018-02-28 三桜工業株式会社 Grounding structure of fuel supply system
JP6160871B2 (en) * 2014-03-27 2017-07-12 豊田合成株式会社 Vehicle fueling device
JP6418038B2 (en) 2014-06-09 2018-11-07 豊田合成株式会社 Fuel supply device
JP2017538614A (en) * 2014-10-17 2017-12-28 イリノイ トゥール ワークス インコーポレイティド System and method for grounding a fuel injection system
JP6350269B2 (en) * 2014-12-24 2018-07-04 豊田合成株式会社 Fuel supply system
DE102015114116A1 (en) * 2015-08-26 2017-03-02 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Pipe connector for connecting a fuel line of a fuel supply for a motor vehicle engine
JP2018069856A (en) * 2016-10-26 2018-05-10 住友理工株式会社 Refueling device
JP6784740B2 (en) 2018-11-01 2020-11-11 本田技研工業株式会社 Refueling device
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CN102180433A (en) 2011-09-14
JP2011131824A (en) 2011-07-07

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