JP3862908B2 - Automotive fuel gas piping structure - Google Patents

Automotive fuel gas piping structure Download PDF

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Publication number
JP3862908B2
JP3862908B2 JP36481599A JP36481599A JP3862908B2 JP 3862908 B2 JP3862908 B2 JP 3862908B2 JP 36481599 A JP36481599 A JP 36481599A JP 36481599 A JP36481599 A JP 36481599A JP 3862908 B2 JP3862908 B2 JP 3862908B2
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JP
Japan
Prior art keywords
fuel gas
supply pipe
gas supply
gas
seal member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP36481599A
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Japanese (ja)
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JP2001182622A (en
Inventor
孝宏 大竹
昌三 井上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hino Motors Ltd
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Hino Motors Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Priority to JP36481599A priority Critical patent/JP3862908B2/en
Publication of JP2001182622A publication Critical patent/JP2001182622A/en
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Publication of JP3862908B2 publication Critical patent/JP3862908B2/en
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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
    • Y02T10/30Use of alternative fuels, e.g. biofuels

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

Description

【0001】
【発明の属する技術分野】
本発明は、燃料ガス容器に蓄納されているガスを燃料とする自動車の燃料ガス配管構造に関するものである。
【0002】
【従来の技術】
燃料ガス容器に蓄納されている天然ガスやLPガスを燃料として用いるバス車両では、一般に燃料ガス容器を床下に設置しているが、低床のバス車両においては床下への設置スペースがないため、屋根上に設置し、燃料ガス容器から車両後部のエンジンに燃料ガス供給管を配管結合している。ところで、前記燃料ガス供給管から車室内に漏洩してもこれが室内に影響を及ぼしてはならない安全対策を施す必要がある。その手段とし特開平8−99543号で燃料ガス供給管を筒状シール部材で覆った燃料タンクのシール内配管固定構造が提供されている。
【0003】
【発明が解決しようとする課題】
上記特開平8−99543号では燃料ガス供給管の固定のために内面に係止部を膨出成形したジョイント部材を筒状シール部材の端部に設け、このジョイント部材を車体に固着した構造であるが、筒状シール部材とジョイント部材を結合しなければならず、この部位はガス洩れに対し不利な構造となっている。
【0004】
本発明の目的は、燃料ガス容器に蓄納されているガスを燃料とする自動車において、万一のガス漏れ時には直ちに外気に排出して安全を確保した自動車の燃料ガス配管構造を提供することである。
【0005】
【課題を解決するための手段】
上記の目的を達成するため本発明は、屋根上に燃料ガス容器を設置し、前記燃料ガス容器とエンジンルーム内のエンジンとを屋根上から車室内を通して燃料ガス供給管を配管結合した自動車において、前記エンジンルームと屋根部との間の前記燃料ガス供給管に外気に連通した通気可能なガス抜きチューブを沿わせて弾性材の筒状シール部材内を貫通させ、この筒状シール部材を止め具にて車体に締め付け固定したことを特徴とするものである。
【0006】
【発明の実施の形態】
以下本発明の実施の形態を図面に基づいて説明する。図1及び図2において、11はバス車両であり、車両後部には隔壁によって車室10と区画されたエンジンルーム12内にエンジン9が搭載されている。
【0007】
前記バス車両11の屋根3の上には燃料ガス容器1が取付部材2を介して設置されており、この燃料ガス容器1と前記エンジン9とは燃料ガスを供給するための屋根3上を通る車室外配管4と屋根上から車室10内を通過する車室内配管4aによって配管結合している。
【0008】
本発明は前記車室内配管4aに特徴を有するものであり、その具体的な構造について図3乃至図5に基づいて説明する。図3において40は車室外配管4から延長している燃料ガス供給管であり、エンジンルーム12内に導かれエンジン補機類7に結合したガス充填口8に接続されている。このガス充填口8は前記燃料ガス容器1から燃料ガスが供給される他に、例えば、ガスの補給所でガス供給ホースをガス充填口8に接続して燃料ガス容器1に補給するものである。
【0009】
前記燃料ガス供給管40にはガス抜きチューブ50を沿わせている。この抜きチューブ50は燃料ガス供給管40等から万一ガスが漏洩した場合にはこれを吸い込み外気に漏洩ガスGを排出するものであり、多数の***50aが開けられている。尚、***50の他にチューブ自体が網状の筒でも良い。前記燃料ガス供給管40とこれに沿わせているガス抜きチューブ50をゴム又は樹脂等による弾性材の筒状シール部材60内を貫通させ、前記燃料ガス供給管40とガス抜きチューブ50を筒状シール部材60で覆っている。前記車室外配管4を含む燃料ガス供給管40の材質はステンレスが、また、ガス抜きチューブ50の材質はナイロンが適当であるがこれに限定するものではない。
【0010】
前記燃料ガス供給管40とガス抜きチューブ50を貫通している筒状シール部材60を介してクリップバンド等の止め具5にて車体10a等に複数箇所で締め付け固定したものである。この場合、筒状シール部材60はゴム又は樹脂等による弾性材で伸縮性があるため筒状シール部材60の上からクリップバンド等の止め具5にて燃料ガス供給管40とガス抜きチューブ50を締め付けても十分に固定される。しかも、筒状シール部材60には継ぎ目を作ることなく燃料ガス供給管40とガス抜きチューブ50を固定することができる。
【0011】
前記筒状シール部材60内を貫通している燃料ガス供給管40は前記の通りエンジン補機類7に結合したガス充填口8に接続されており、ガス抜きチューブ50は、その上端は屋根の上方に取り出されて漏洩ガスGを外気に排出し、下端はガス充填口8の近くで外気に開放されている。
【0012】
本発明は上記の通りの構造であるから、屋根上から車室10内を通してエンジンルーム12内に導かれる車室内配管4aは燃料ガス供給管40とガス抜きチューブ50とが筒状シール部材60中を貫通しているため、この燃料ガス供給管40から万一ガス漏れが生じたとしても、ガス抜きチューブ50で吸い込んで漏洩ガスGを屋根の上方より車外に速やかに排出される。
【0013】
また、筒状シール部材60は断熱作用を持っており、燃料充填時における燃料ガス供給管40の低温化による車室10内等への結露を防止する。さらに、燃料ガス供給管40より生じる結露水Wはガス抜きチューブ50で吸い込んでガス充填口8の近くで外気に開放されている下端から車外に排出する。このガス抜きチューブ50の下端は結露水Wのみならず漏洩ガスGも排出することができる。
【0014】
尚、前記筒状シール部材60はクリップバンド等の止め具5にて締め付けており、この締め付け部位は図5で示すように遮断されているが、止め具5間では図4で示すように空間を有しているため、この空間に存在するガス抜きチューブ50より漏洩ガスGや結露水Wを吸い込んで車室10外へ確実に排出することができる。
【0015】
【発明の効果】
以上述べたように本発明によると、筒状シール部材に継ぎ目を作ることなく燃料ガス供給管とガス抜きチューブを固定することができるため、燃料ガス供給管から万一ガスが漏洩しても車室内に漏洩したガスが侵入することがなく、漏洩ガスは燃料ガス供給管に沿わせ、かつ燃料ガス供給管と共に筒状シール部材で覆っているガス抜きチューブから車室外へ速やかに排出するため安全が確保される。また、筒状シール部材による断熱作用により燃料充填時における燃料ガス供給管の低温化による車室内等への結露を防止し、燃料ガス供給管より生じる結露水はガス抜きチューブを介して車室外へ排出することができる利点がある。
【図面の簡単な説明】
【図1】本発明の配管構造の概略を示すバス車両の側面図
【図2】本発明の配管構造の概略を示すバス車両の後面図
【図3】本発明の配管構造の要部を示す図2のA矢視部の断面図
【図4】図3のB−B線断面図
【図5】図3のC−C線断面図
【符号の説明】
1 燃料ガス容器
2 取付部材
3 屋根
4 車室外配管
4a 車室内配管
5 止め具
7 補機類
8 ガス充填口
9 エンジン
10 車室
11 バス車両
12 エンジンルーム
40 燃料ガス供給管
50 ガス抜きチューブ
50a ***
60 筒状シール部材
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fuel gas piping structure of an automobile that uses gas stored in a fuel gas container as fuel.
[0002]
[Prior art]
In bus vehicles that use natural gas or LP gas stored in fuel gas containers as fuel, fuel gas containers are generally installed under the floor, but low floor bus vehicles do not have space for installation under the floor. It is installed on the roof, and a fuel gas supply pipe is piped from the fuel gas container to the engine at the rear of the vehicle. Incidentally, it is necessary to take safety measures that should not affect the interior of the vehicle even if it leaks from the fuel gas supply pipe. As a means therefor, Japanese Patent Application Laid-Open No. Hei 8-99543 provides a fuel tank in-seal pipe fixing structure in which a fuel gas supply pipe is covered with a cylindrical seal member.
[0003]
[Problems to be solved by the invention]
In Japanese Patent Laid-Open No. 8-99543, a joint member is formed at the end of a cylindrical seal member, and a joint member is formed on the inner surface to fix the fuel gas supply pipe. However, the cylindrical seal member and the joint member must be joined, and this portion has a disadvantageous structure against gas leakage.
[0004]
SUMMARY OF THE INVENTION An object of the present invention is to provide a fuel gas piping structure for an automobile that uses a gas stored in a fuel gas container as fuel and immediately discharges it to the outside air in the event of a gas leak to ensure safety. is there.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a vehicle in which a fuel gas container is installed on a roof, and the fuel gas container and the engine in the engine room are pipe-coupled to the fuel gas supply pipe from the roof through the vehicle interior. The fuel gas supply pipe between the engine room and the roof is provided with a ventable gas vent tube communicating with the outside air so as to pass through the inside of the cylindrical seal member made of an elastic material. It is characterized in that it is fastened and fixed to the vehicle body.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, reference numeral 11 denotes a bus vehicle, and an engine 9 is mounted in an engine room 12 partitioned from a vehicle compartment 10 by a partition wall at the rear of the vehicle.
[0007]
A fuel gas container 1 is installed on the roof 3 of the bus vehicle 11 via an attachment member 2, and the fuel gas container 1 and the engine 9 pass over the roof 3 for supplying fuel gas. The outside piping 4 is connected to the outside piping 4 by the inside piping 4a that passes through the inside of the passenger compartment 10 from the roof.
[0008]
The present invention is characterized by the vehicle interior piping 4a, and a specific structure thereof will be described with reference to FIGS. In FIG. 3, reference numeral 40 denotes a fuel gas supply pipe extending from the vehicle interior piping 4, and is connected to a gas filling port 8 led into the engine room 12 and coupled to the engine accessories 7. In addition to the fuel gas being supplied from the fuel gas container 1, the gas filling port 8 replenishes the fuel gas container 1 by connecting a gas supply hose to the gas filling port 8 at a gas replenishment station, for example. .
[0009]
A gas vent tube 50 is provided along the fuel gas supply pipe 40. The vent tube 50 sucks gas from the fuel gas supply pipe 40 or the like and discharges the leaked gas G to the outside air, and has a large number of small holes 50a. In addition to the small holes 50, the tube itself may be a net-like tube. The fuel gas supply pipe 40 and the gas vent tube 50 extending along the fuel gas supply pipe 40 are passed through a cylindrical seal member 60 made of an elastic material such as rubber or resin, and the fuel gas supply pipe 40 and the gas vent tube 50 are cylindrical. Covered with a seal member 60. Stainless steel is suitable for the material of the fuel gas supply pipe 40 including the vehicle exterior piping 4, and nylon is suitable for the material of the gas vent tube 50, but it is not limited to this.
[0010]
The fuel gas supply pipe 40 and the gas vent tube 50 are clamped and fixed to the vehicle body 10a and the like by a fastener 5 such as a clip band through a cylindrical seal member 60 penetrating the fuel gas supply pipe 40 and the gas vent tube 50. In this case, since the cylindrical seal member 60 is an elastic material such as rubber or resin and has elasticity, the fuel gas supply pipe 40 and the gas vent tube 50 are connected to the stopper 5 such as a clip band from above the cylindrical seal member 60. Even if it is tightened, it is sufficiently fixed. Moreover, the fuel gas supply pipe 40 and the gas vent tube 50 can be fixed to the cylindrical seal member 60 without creating a seam.
[0011]
The fuel gas supply pipe 40 penetrating through the cylindrical seal member 60 is connected to the gas filling port 8 coupled to the engine accessories 7 as described above, and the upper end of the gas vent tube 50 is a roof. It is taken out upward to discharge the leaked gas G to the outside air, and the lower end is opened to the outside air near the gas filling port 8.
[0012]
Since the present invention has the structure as described above, the vehicle interior piping 4a led from the roof through the vehicle interior 10 into the engine room 12 includes the fuel gas supply tube 40 and the gas vent tube 50 in the cylindrical seal member 60. Therefore, even if a gas leak occurs from the fuel gas supply pipe 40, the gas is sucked into the gas vent tube 50 and the leaked gas G is quickly discharged out of the vehicle from above the roof.
[0013]
In addition, the cylindrical seal member 60 has a heat insulating action, and prevents condensation in the passenger compartment 10 or the like due to the low temperature of the fuel gas supply pipe 40 during fuel filling. Further, the dew condensation water W generated from the fuel gas supply pipe 40 is sucked by the degassing tube 50 and discharged from the lower end opened to the outside near the gas filling port 8 to the outside of the vehicle. The lower end of the degassing tube 50 can discharge not only the dew condensation water W but also the leakage gas G.
[0014]
The tubular seal member 60 is fastened by a stopper 5 such as a clip band, and the tightened portion is blocked as shown in FIG. 5, but the space between the stoppers 5 is shown in FIG. Therefore, the leaked gas G and the dew condensation water W can be sucked from the gas vent tube 50 existing in this space and can be reliably discharged out of the passenger compartment 10.
[0015]
【The invention's effect】
As described above, according to the present invention, the fuel gas supply pipe and the gas vent tube can be fixed without creating a seam in the cylindrical seal member. Therefore, even if gas leaks from the fuel gas supply pipe, There is no intrusion of leaked gas into the room, and the leaked gas is safely discharged along the fuel gas supply pipe and from the gas vent tube covered with the cylindrical seal member together with the fuel gas supply pipe. Is secured. In addition, the heat insulating action by the cylindrical seal member prevents condensation in the vehicle interior due to the low temperature of the fuel gas supply pipe when filling the fuel, and the dew condensation water generated from the fuel gas supply pipe goes out of the vehicle compartment through the gas vent tube. There is an advantage that can be discharged.
[Brief description of the drawings]
FIG. 1 is a side view of a bus vehicle showing an outline of the piping structure of the present invention. FIG. 2 is a rear view of the bus vehicle showing an outline of the piping structure of the present invention. 2 is a cross-sectional view taken along the arrow A in FIG. 2. FIG. 4 is a cross-sectional view taken along the line BB in FIG. 3. FIG. 5 is a cross-sectional view taken along the line CC in FIG.
DESCRIPTION OF SYMBOLS 1 Fuel gas container 2 Mounting member 3 Roof 4 Car exterior piping 4a Car interior piping 5 Stopper 7 Auxiliary machinery 8 Gas filling port 9 Engine 10 Car interior 11 Bus vehicle 12 Engine room 40 Fuel gas supply pipe 50 Gas vent tube 50a Small hole 60 Cylindrical seal member

Claims (1)

屋根上に燃料ガス容器を設置し、前記燃料ガス容器とエンジンルーム内のエンジンとを屋根上から車室内を通して燃料ガス供給管を配管結合した自動車において、前記エンジンルームと屋根部との間の前記燃料ガス供給管に外気に連通した通気可能なガス抜きチューブを沿わせて弾性材の筒状シール部材内を貫通させ、この筒状シール部材を止め具にて車体に締め付け固定したことを特徴とする自動車の燃料ガス配管構造。In a vehicle in which a fuel gas container is installed on a roof, and a fuel gas supply pipe is piped and connected between the fuel gas container and the engine in the engine room from the roof through the vehicle interior, the space between the engine room and the roof part is A fuel gas supply pipe is provided with a ventable degassing tube that communicates with the outside air, penetrates through a cylindrical seal member made of an elastic material, and the cylindrical seal member is fastened and fixed to the vehicle body with a stopper. Automobile fuel gas piping structure.
JP36481599A 1999-12-22 1999-12-22 Automotive fuel gas piping structure Expired - Fee Related JP3862908B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP36481599A JP3862908B2 (en) 1999-12-22 1999-12-22 Automotive fuel gas piping structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP36481599A JP3862908B2 (en) 1999-12-22 1999-12-22 Automotive fuel gas piping structure

Publications (2)

Publication Number Publication Date
JP2001182622A JP2001182622A (en) 2001-07-06
JP3862908B2 true JP3862908B2 (en) 2006-12-27

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101601043B1 (en) * 2010-08-27 2016-03-09 현대자동차주식회사 Fuel supply system of vehicle
CN108271366B (en) * 2016-10-25 2018-11-20 今治造船株式会社 Gas pipeline system and ship including gas pipeline system

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