JP4136213B2 - Fuel tank module - Google Patents

Fuel tank module Download PDF

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Publication number
JP4136213B2
JP4136213B2 JP22788299A JP22788299A JP4136213B2 JP 4136213 B2 JP4136213 B2 JP 4136213B2 JP 22788299 A JP22788299 A JP 22788299A JP 22788299 A JP22788299 A JP 22788299A JP 4136213 B2 JP4136213 B2 JP 4136213B2
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Japan
Prior art keywords
valve
fuel tank
fuel
cut
tank
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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 - Lifetime
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JP22788299A
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Japanese (ja)
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JP2001018667A (en
Inventor
隆 長井
里美 和田
和巳 春田
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Aisan Industry Co Ltd
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Aisan Industry Co Ltd
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Priority to JP22788299A priority Critical patent/JP4136213B2/en
Publication of JP2001018667A publication Critical patent/JP2001018667A/en
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Publication of JP4136213B2 publication Critical patent/JP4136213B2/en
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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】
本発明は自動車の燃料タンクに関し、詳しくは、複数の部品を組み立てて、より高い機能を有する一部品とする、いわゆる燃料タンクモジュールに関するものである。
【0002】
【従来の技術】
従来、内燃機関の燃料系統における蒸発燃料処理装置としては、図に示すように、金属製の燃料タンク49の最上部にORVR差圧弁50およびカットオフバルブ
【0003】
ORVR差圧弁50は、燃料給油時、燃料タンク49内の燃料蒸気圧が上昇するのでダイアフラム弁53がダイアフラムスプリング54に抗して開き、燃料タンク49内の蒸発燃料が矢印のようにながれ、ゴムホース52を経由してキャニスタ70内の吸着剤71aに吸着される。燃料満タン時は、浮子弁55が燃料中に沈むので浮力により浮子弁座50aを閉鎖し、蒸発燃料の流れは遮断される。また、カットオフバルブ60は、車両横転時に、燃料タンク49内の燃料がキャニスタ70を経て外部に流出するのを防止するための開閉弁で、車両横転時にはカットオフ弁スプリング63の付勢により、カットオフ弁64がカットオフ弁座60aに当接してカットオフバルブ60を閉止するよう構成される。また、カットオフバルブ60には、万一カットオフ弁64がカットオフ弁座60aに食い付いてしまった場合に、燃料タンク49内の圧力を逃がすための正圧安全弁65を有する。一方、キャニスタ70内に設けられた正負圧チェックバルブ84は、燃料タンク49内の圧力を逃がすための開閉弁で、例えば、燃料タンク49内が冷やされ圧力が低下した場合、負圧チェック弁84aが開いて圧力を逃がし、また、燃料タンク49内の圧力が上昇した場合は、ダイアフラム弁84bを開いて圧力を逃がすことにより燃料タンク49の破損を防止するよう構成されている。
【0004】
【発明が解決しようとする課題】
したがって、燃料タンク49内部は常に蒸発燃料で満たされており、燃料タンク49内圧の上昇によって、ゴム製のグロメット51、61および図示しない燃料ポンプモジュール用ガスケットを透過して僅かではあるが蒸発燃料が大気中に放出される。これらの放出量は、ORVR規制がさほど厳しくない場合には問題になる量ではないが、規制がさらに厳しくなった場合には僅かな放出量が問題となる。また、昨今のモジュール生産のための部品の一体化、コスト低減のための点数削減に対応した自動車部品のモジュール化の要請が強く望まれている。そこで本発明は、蒸発燃料の大気中への放出量を低減させるとともに、モジュール生産を可能とする燃料タンクモジュールを提供することを課題とする。
【0005】
【課題を解決するための手段】
前記課題の解決を目的としてなされた請求項1の発明は、燃料タンク内の圧力または燃料の浮力によって、燃料タンクとキャニスタとを結ぶ通路を開閉する一つまたは複数の開閉弁の弁室壁、または燃料ポンプのポンプハウジング固定部が、燃料タンクカバーに一体成形されていることを特徴とする。
【0006】
【作用】
上述のように、請求項1の発明においては、ORVR差圧弁、カットオフバルブ、燃料ポンプ等を、シール部材を介さずに燃料タンクカバーに一体成形して気密を保持するようにしたので、燃料タンク内の蒸発燃料がシール部材を通して大気中に漏洩することがない。なお、前記各部品の作用については、従来技術と同様であるため説明は省く。
【0007】
【発明の実施の形態】
本発明の望ましい実施形態について図面を参照して説明する。図1は本発明の第1の実施形態に係る燃料タンクモジュールの断面図、図2はタンクカバーの上面図および正面断面図である。図2において、樹脂製のタンクカバー1にはORVR差圧弁を構成するための浮子弁室壁1a、カットオフ弁を構成するためのカットオフ弁室壁1bおよび弁座部1cならびに正圧安全弁室1dおよびパイプ部1i、図示しない燃料ポンプを収容するポンプハウジング17(図1参照)を固定するためのポンプハウジング固定部1eおよび燃料通路部1fならびに電気コネクタ部1g、等が一体成形されている。浮子弁室壁1aには弁座を構成するための弁座部1hが一体成形されている。図1において、燃料タンク40のタンクカバー1の浮子弁室壁1a内には浮子弁2、スプリング3が組み込まれ、カバー4がスナップ固定され、浮子弁室5を形成している。また、弁座部1hにはゴム製の弁部材6が装着され弁座7を構成している。
【0008】
浮子弁室5上部にはダイアフラム弁アッセンブリ20が溶着されている。ダイアフラム弁アッセンブリ20は、弁座部21とカバー部22とから成り、弁座部21とカバー部22とでダイアフラム弁23外周のビード部23aを圧着して気密を保持して溶着される。ダイアフラム弁23とカバー部22との間にはスプリング24が装着され、ダイアフラム弁23をダイアフラム弁座21aに押圧してダイアフラム弁アッセンブリ20を構成する。また、カバー部22にはダイアフラム室22a圧力を給油管85(図5参照)の入口部85a(図5参照)に連通するためのパイプ部22bが形成されている。また、弁座部21にはキャニスタ70(図5参照)の吸着剤貯蔵室71(図5参照)に連通するパイプ部21bが形成されている。浮子弁室5とダイアフラム弁アッセンブリ20とでORVR差圧弁50(図5参照)を構成する。
【0009】
一方、カットオフ弁室壁1b内にはカットオフ弁8が装着されスプリング9を介してカバー11がカットオフ弁室壁1b下端にスナップ固定され、弁座部1cと共働してカットオフバルブ60(図5参照)を構成する。正圧安全弁室1d内にはスプリング12、チェックボール13が装着され、弁座14が圧入されて正圧安全弁15を構成している。正圧安全弁室1dおよびカットオフバルブ室16はパイプ部1iを経由してキャニスタ70(図5参照)の正負圧チェックバルブ84(図5参照)に連通する。ポンプハウジング固定部1eには図示しない燃料ポンプを内蔵するポンプハウジング17がスナップ固定され、ポンプハウジング17の下端には燃料フィルタ18がスナップ固定される。ポンプハウジング17には燃料残量を計示するためのセンダゲージ19が装着されている。図示しない燃料ポンプの図示しない燃料通路部が図示しないOリングを介してタンクカバー1の燃料通路部1f(図2参照)に連結され、エンジンに給油される。また、図示しない燃料ポンプの図示しない電気回路部がタンクカバー1の電気コネクタ部1g(図2参照)に連結され、電気的に制御される。タンクカバー1とタンク本体26との接合部1j、26aは気密を保持して溶着され燃料タンク40を構成している。
【0010】
次に、本発明の第2の実施形態の構成について、図3を参照して説明する。図3において、予め組み付けられたカットオフバルブ31のフランジ部31aがタンクカバー32に溶着固定されて気密を保持している。0RVR差圧弁33およびポンプハウジング17のタンクカバー32への装着形態については、第1の実施形態と同様なので説明は省く。次に、本発明の参考例の構成について、図4を参照して説明する。図4において、予め組み付けられた0RVR差圧弁34、カットオフバルブ35、燃料ポンプモジュール36のそれぞれのフランジ部34a、35a、36aがタンクカバー37に溶着固定され気密を保持している。
【0011】
【発明の効果】
本発明は上述のように構成されているので以下の効果を奏する。すなわち、0RVR差圧弁、カットオフバルブ、燃料ポンプモジュールがゴム製のシール部材を介さず、直接タンクカバーに気密を保持して一体的に形成されているので、シール部材からの蒸発燃料の大気中への流出がない。また、自動車のモジュール生産に対応した燃料タンクのモジュール化が可能となる。
【図面の簡単な説明】
【図1】本発明の第1の実施形態に係るタンクモジュールの縦断面図である。
【図2】図2(a)は本発明の第1の実施形態に係るタンクモジュールのタンクカバーの上面図である。図2(b)はその正面断面図である。
【図3】本発明の第2の実施形態に係るタンクモジュールのカバーアッセンブリの縦断面図である。
【図4】図4(a)は本発明の参考例に係るタンクモジュールのカバーアッセンブリの上面図である。図4(b)はその正面断面図である。
【図5】従来技術を示す蒸発燃料処理装置の断面模式図である。
【符号の説明】
5 浮子弁室
20 ダイアフラム弁アッセンブリ
31 カットオフバルブ
33 0RVR差圧弁
34 0RVR差圧弁
35 カットオフバルブ
36 燃料ポンプモジュール
40 燃料タンク
50 0RVR差圧弁
60 カットオフバルブ
70 キャニスタ
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automobile fuel tank, and more particularly to a so-called fuel tank module in which a plurality of parts are assembled into a single part having a higher function.
[0002]
[Prior art]
Conventionally, as an evaporative fuel processing device in a fuel system of an internal combustion engine, as shown in FIG. 5 , an ORVR differential pressure valve 50 and a cut-off valve are provided at the uppermost portion of a metal fuel tank 49.
In the ORVR differential pressure valve 50, when fuel is supplied, the fuel vapor pressure in the fuel tank 49 rises, so that the diaphragm valve 53 opens against the diaphragm spring 54, and the evaporated fuel in the fuel tank 49 flows as shown by an arrow. 52 is adsorbed by the adsorbent 71a in the canister 70. When the fuel is full, the float valve 55 sinks into the fuel, so the float valve seat 50a is closed by buoyancy, and the flow of evaporated fuel is cut off. The cut-off valve 60 is an on-off valve for preventing the fuel in the fuel tank 49 from flowing out through the canister 70 when the vehicle rolls over. By the bias of the cut-off valve spring 63 when the vehicle rolls over, The cut-off valve 64 is configured to contact the cut-off valve seat 60a and close the cut-off valve 60. Further, the cut-off valve 60 has a positive pressure safety valve 65 for releasing the pressure in the fuel tank 49 in the event that the cut-off valve 64 bites into the cut-off valve seat 60a. On the other hand, the positive / negative pressure check valve 84 provided in the canister 70 is an on-off valve for releasing the pressure in the fuel tank 49. For example, when the fuel tank 49 is cooled and the pressure decreases, the negative pressure check valve 84a. Is opened to release the pressure, and when the pressure in the fuel tank 49 increases, the diaphragm valve 84b is opened to release the pressure, thereby preventing the fuel tank 49 from being damaged.
[0004]
[Problems to be solved by the invention]
Therefore, the inside of the fuel tank 49 is always filled with the evaporated fuel, and by the increase in the internal pressure of the fuel tank 49, the evaporated fuel passes through the rubber grommets 51 and 61 and a fuel pump module gasket (not shown) slightly. Released into the atmosphere. These released amounts are not problematic when the ORVR regulations are not so strict, but a small amount of emitted matters when the regulations become more strict. In addition, there is a strong demand for modularization of automobile parts corresponding to the integration of parts for recent module production and the reduction of points for cost reduction. Accordingly, an object of the present invention is to provide a fuel tank module that can reduce the amount of evaporated fuel released into the atmosphere and enables module production.
[0005]
[Means for Solving the Problems]
The invention of claim 1, which has been made for the purpose of solving the above-mentioned problem, is a valve chamber wall of one or more on-off valves that opens and closes a passage connecting the fuel tank and the canister by pressure in the fuel tank or fuel buoyancy . Alternatively, the pump housing fixing portion of the fuel pump is integrally formed with the fuel tank cover .
[0006]
[Action]
As described above, in the first aspect of the invention, the ORVR differential pressure valve, the cut-off valve, the fuel pump, etc. are integrally formed in the fuel tank cover without using the seal member so that the airtightness is maintained. The evaporated fuel in the tank does not leak into the atmosphere through the seal member. The operation of each component is the same as that of the prior art, and will not be described.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of a fuel tank module according to the first embodiment of the present invention, and FIG. 2 is a top view and a front sectional view of a tank cover. In FIG. 2, a resin tank cover 1 has a float valve chamber wall 1a for constituting an ORVR differential pressure valve, a cut-off valve chamber wall 1b and a valve seat portion 1c for constituting a cut-off valve, and a positive pressure safety valve chamber. 1d and the pipe portion 1i, a pump housing fixing portion 1e for fixing a pump housing 17 (see FIG. 1) for housing a fuel pump (not shown), a fuel passage portion 1f, an electrical connector portion 1g, and the like are integrally formed. A valve seat portion 1h for constituting a valve seat is integrally formed on the float valve chamber wall 1a. In FIG. 1, a float valve 2 and a spring 3 are incorporated in a float valve chamber wall 1 a of a tank cover 1 of a fuel tank 40, and a cover 4 is snap-fixed to form a float valve chamber 5. Further, a rubber valve member 6 is mounted on the valve seat portion 1 h to constitute a valve seat 7.
[0008]
A diaphragm valve assembly 20 is welded to the upper part of the floating valve chamber 5. The diaphragm valve assembly 20 includes a valve seat portion 21 and a cover portion 22. The bead portion 23 a on the outer periphery of the diaphragm valve 23 is crimped between the valve seat portion 21 and the cover portion 22 and is welded while maintaining airtightness. A spring 24 is mounted between the diaphragm valve 23 and the cover portion 22, and the diaphragm valve assembly 20 is configured by pressing the diaphragm valve 23 against the diaphragm valve seat 21a. Further, the cover portion 22 is formed with a pipe portion 22b for communicating the pressure of the diaphragm chamber 22a with the inlet portion 85a (see FIG. 5) of the oil supply pipe 85 (see FIG. 5). The valve seat portion 21 is formed with a pipe portion 21b communicating with the adsorbent storage chamber 71 (see FIG. 5) of the canister 70 (see FIG. 5). The floating valve chamber 5 and the diaphragm valve assembly 20 constitute an ORVR differential pressure valve 50 (see FIG. 5).
[0009]
On the other hand, a cut-off valve 8 is mounted in the cut-off valve chamber wall 1b, and a cover 11 is snap-fixed to the lower end of the cut-off valve chamber wall 1b via a spring 9, and cooperates with the valve seat portion 1c to cut off the cut-off valve. 60 (see FIG. 5). A spring 12 and a check ball 13 are mounted in the positive pressure safety valve chamber 1d, and a valve seat 14 is press-fitted to constitute a positive pressure safety valve 15. The positive pressure safety valve chamber 1d and the cut-off valve chamber 16 communicate with the positive / negative pressure check valve 84 (see FIG. 5) of the canister 70 (see FIG. 5) via the pipe portion 1i. A pump housing 17 containing a fuel pump (not shown) is snap-fixed to the pump housing fixing portion 1e, and a fuel filter 18 is snap-fixed to the lower end of the pump housing 17. The pump housing 17 is equipped with a sender gauge 19 for measuring the remaining fuel amount. A fuel passage portion (not shown) of a fuel pump (not shown) is connected to a fuel passage portion 1f (see FIG. 2) of the tank cover 1 via an O-ring (not shown) and is supplied to the engine. Further, an electric circuit portion (not shown) of a fuel pump (not shown) is connected to an electric connector portion 1g (see FIG. 2) of the tank cover 1 and is electrically controlled. The joint portions 1j and 26a between the tank cover 1 and the tank body 26 are welded while maintaining airtightness to constitute a fuel tank 40.
[0010]
Next, the configuration of the second exemplary embodiment of the present invention will be described with reference to FIG. In FIG. 3, the flange portion 31a of the cut-off valve 31 assembled in advance is welded and fixed to the tank cover 32 to maintain airtightness. Since the 0RVR differential pressure valve 33 and the mounting form of the pump housing 17 to the tank cover 32 are the same as those in the first embodiment, the description thereof will be omitted. Next, the configuration of a reference example of the present invention will be described with reference to FIG. In FIG. 4, the flange portions 34a, 35a, and 36a of the 0RVR differential pressure valve 34, the cut-off valve 35, and the fuel pump module 36 that are assembled in advance are welded and fixed to the tank cover 37 to maintain airtightness.
[0011]
【The invention's effect】
Since this invention is comprised as mentioned above, there exist the following effects. That is, the 0RVR differential pressure valve, the cut-off valve, and the fuel pump module are formed integrally with the tank cover so as to be airtight without passing through the rubber seal member. There is no outflow. In addition, the fuel tank can be modularized for automobile module production.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a tank module according to a first embodiment of the present invention.
FIG. 2 (a) is a top view of the tank cover of the tank module according to the first embodiment of the present invention. FIG. 2B is a front sectional view thereof.
FIG. 3 is a longitudinal sectional view of a cover assembly of a tank module according to a second embodiment of the present invention.
FIG. 4 (a) is a top view of a cover assembly of a tank module according to a reference example of the present invention. FIG. 4B is a front sectional view thereof.
FIG. 5 is a schematic cross-sectional view of an evaporative fuel processing apparatus showing the prior art.
[Explanation of symbols]
5 Float valve chamber 20 Diaphragm valve assembly 31 Cutoff valve 33 0RVR differential pressure valve 34 0RVR differential pressure valve 35 Cutoff valve 36 Fuel pump module 40 Fuel tank 50 0RVR differential pressure valve 60 Cutoff valve 70 Canister

Claims (1)

燃料タンク本体と燃料タンクカバーとが組み合わされて密閉された燃料タンク空間を形成するものであって、燃料タンク内の圧力または燃料の浮力によって、燃料タンクとキャニスタとを結ぶ通路を開閉する一つまたは複数の開閉弁を備える燃料タンクモジュールにおいて、
前記開閉弁の弁室壁、または燃料ポンプのポンプハウジング固定部が、前記燃料タンクカバーに一体成形され、かつ前記燃料タンク内に突出して設けられることにより、前記燃料タンク本体と前記燃料タンクカバーとが溶着されており、シール部材を必要としないことを特徴とする燃料タンクモジュール。
The fuel tank body and the fuel tank cover are combined to form a sealed fuel tank space, and one that opens and closes the passage connecting the fuel tank and the canister by the pressure in the fuel tank or the buoyancy of the fuel Or in a fuel tank module comprising a plurality of on-off valves,
A valve chamber wall of the opening and closing valve or a pump housing fixed part of the fuel pump, the integrally molded to the fuel tank cover, and the Rukoto protrudes into the fuel tank, the fuel tank cover and the fuel tank body, And a fuel tank module characterized in that a sealing member is not required .
JP22788299A 1999-07-07 1999-07-07 Fuel tank module Expired - Lifetime JP4136213B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22788299A JP4136213B2 (en) 1999-07-07 1999-07-07 Fuel tank module

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Application Number Priority Date Filing Date Title
JP22788299A JP4136213B2 (en) 1999-07-07 1999-07-07 Fuel tank module

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Publication Number Publication Date
JP2001018667A JP2001018667A (en) 2001-01-23
JP4136213B2 true JP4136213B2 (en) 2008-08-20

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004116359A (en) * 2002-09-25 2004-04-15 Honda Motor Co Ltd Fuel injection device module
JP2004190491A (en) * 2002-12-06 2004-07-08 Hitachi Unisia Automotive Ltd Fuel feeding device
DE10318844A1 (en) * 2003-04-25 2004-11-11 Siemens Ag Fuel tank
US20060213553A1 (en) * 2005-03-22 2006-09-28 Vaughn K. Mills & Kenneth M. Spink Low profile overfill limit device with reverse flow capability
JP4672463B2 (en) * 2005-06-30 2011-04-20 本田技研工業株式会社 Fuel tank structure
JP2020062921A (en) 2018-10-16 2020-04-23 株式会社デンソー Vehicle structure
DE102019104333A1 (en) * 2019-02-20 2020-08-20 Röchling Automotive SE & Co. KG Vehicle liquid tank with integrated float valve
CN110005556B (en) * 2019-04-30 2024-04-09 浙江中马园林机器股份有限公司 Oil inlet structure of two-stroke gasoline engine

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