JPH0618085Y2 - Fuel outflow prevention valve - Google Patents

Fuel outflow prevention valve

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Publication number
JPH0618085Y2
JPH0618085Y2 JP1987004936U JP493687U JPH0618085Y2 JP H0618085 Y2 JPH0618085 Y2 JP H0618085Y2 JP 1987004936 U JP1987004936 U JP 1987004936U JP 493687 U JP493687 U JP 493687U JP H0618085 Y2 JPH0618085 Y2 JP H0618085Y2
Authority
JP
Japan
Prior art keywords
valve
valve body
weight
chamber
fuel
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 - Lifetime
Application number
JP1987004936U
Other languages
Japanese (ja)
Other versions
JPS63115966U (en
Inventor
修 向井
賢一 久保田
Original Assignee
東北三國工業株式会社
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
Application filed by 東北三國工業株式会社 filed Critical 東北三國工業株式会社
Priority to JP1987004936U priority Critical patent/JPH0618085Y2/en
Publication of JPS63115966U publication Critical patent/JPS63115966U/ja
Application granted granted Critical
Publication of JPH0618085Y2 publication Critical patent/JPH0618085Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【考案の詳細な説明】 ［産業上の利用分野］ 本考案は車両用の燃料タンクと、該燃料タンク内の燃料
が蒸発して発生した燃料蒸気を捕捉する燃料蒸気捕集
部、例えば活性炭などの吸着剤を内蔵するキャニスタと
の間に配置して、車両が転倒又は著しく傾斜したとき
に、燃料タンク内の燃料が燃料蒸発捕集部の中に流入す
るのを防止する燃料流出防止弁の改良に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a fuel tank for a vehicle, and a fuel vapor collection unit for capturing fuel vapor generated by evaporation of fuel in the fuel tank, such as activated carbon. Of the fuel outflow prevention valve for preventing the fuel in the fuel tank from flowing into the fuel evaporative trap when the vehicle falls over or is significantly inclined. Regarding improvement.

［従来技術］ 車両が転倒又は著しく傾斜したときに、燃料タンク内の
燃料が流出して燃料蒸気捕集部、例えばキャニスタの中
に流入するのを防止する燃料流出防止弁としては、特開
昭56-151253号内に開示されている第５図に示す構成の
もの、又図面は省略するが特開昭61-266883号開示の構
成、及び公報に開示されていないが現在数多く生産され
ている第６図の構成のものがあって、何れも車両の転倒
又は傾斜時、球状の重錘が円錐状の斜面に沿って転動す
ることによって閉弁する構成である。第５図において符
号１は弁筐体、２は燃料蒸気捕集部に連通する開口部、
３は前記弁筐体１の内部に形成された円錐状の斜面、４
は球状の重錘、５は蓋体、６は燃料タンクの上部空間に
連通する開口部、７は弁体であってＯリング８が装着さ
れ、９が前記Ｏリング８と協同して弁作用をする弁座で
ある。車両が傾斜すると、弁筐体１も傾斜し、重錘４が
斜面３に沿って側方に移動して弁体７を押し上げＯリン
グ８が弁座９に着座して開口部６からの燃料の流入、従
って開口部２からの燃料の流出が防止される。第６図に
おいては１１は弁筐体、１２は燃料タンク上部空間に連
通する開口部、１３は燃料蒸気捕集部に連通する開口
部、１４は球状弁体、１５は弁衝部材、１６は前記弁衝
部材１５を案内する筒状案内部の端面であって前記球状
弁体１４と協同して弁作用をする弁座を形成し、１７は
前記球状弁体１４を閉弁方向に付勢するスプリング、１
８は球状の重錘で、前記弁衝部材１５を介し、前記スプ
リング１７の力に抗して球状弁体１４を押し下げ、車両
が正常の姿勢にあるときに開弁作用をする。第７図は弁
衝部材１５の第６図におけるVII-VII断面矢視図であ
る。第８図は車両が転倒又は傾斜し（但し図面は直立姿
勢に画いてある）、斜面１９に沿って球状の重錘１８が
移動して弁衝部材１５に重力が作用しなくなり、スプリ
ング１７の力によって球状弁体１４が弁座１６に着座し
た状態を示している。２０は前記斜面１９に燃料蒸気の
通路として形成した放射状の溝である。[Prior Art] As a fuel outflow prevention valve for preventing the fuel in a fuel tank from flowing out and flowing into a fuel vapor collection unit, for example, a canister when a vehicle falls or is significantly inclined, there is disclosed in Japanese Patent Application Laid-Open No. The structure shown in FIG. 5 disclosed in Japanese Patent No. 56-151253, or the structure disclosed in Japanese Patent Laid-Open No. 61-266883 (not shown) and not shown in the official gazette, but many are now being produced. There is a configuration shown in FIG. 6, and each of them has a configuration in which a valve is closed by rolling a spherical weight along a conical slope when the vehicle falls or leans. In FIG. 5, reference numeral 1 is a valve housing, 2 is an opening communicating with the fuel vapor collection portion,
3 is a conical slope formed inside the valve housing 1;
Is a spherical weight, 5 is a lid, 6 is an opening communicating with the upper space of the fuel tank, 7 is a valve and an O-ring 8 is attached, and 9 is a valve action in cooperation with the O-ring 8. It is a valve seat that operates. When the vehicle tilts, the valve housing 1 also tilts, the weight 4 moves laterally along the slope 3, pushes up the valve body 7, and the O-ring 8 is seated on the valve seat 9 and the fuel from the opening 6 is discharged. Of the fuel and thus the fuel flowing out of the opening 2 is prevented. In FIG. 6, 11 is a valve housing, 12 is an opening communicating with the upper space of the fuel tank, 13 is an opening communicating with the fuel vapor collecting section, 14 is a spherical valve element, 15 is a valve impact member, and 16 is An end surface of a tubular guide portion that guides the valve impact member 15 forms a valve seat that cooperates with the spherical valve body 14 to perform a valve action, and 17 urges the spherical valve body 14 in a valve closing direction. Spring, 1
Reference numeral 8 denotes a spherical weight, which pushes down the spherical valve body 14 through the valve impact member 15 against the force of the spring 17 and opens the valve when the vehicle is in a normal posture. FIG. 7 is a sectional view of the valve member 15 taken along the line VII-VII in FIG. FIG. 8 shows that the vehicle has fallen or tilted (however, the drawing is drawn in an upright posture), the spherical weight 18 moves along the slope 19, the gravity does not act on the valve impact member 15, and the spring 17 The state where the spherical valve body 14 is seated on the valve seat 16 by the force is shown. Reference numeral 20 is a radial groove formed in the slope 19 as a passage for fuel vapor.

第５図の構成と第６図乃至第８図の構成の長所，短所に
ついては言及しない。本考案は第６図乃至第８図に示す
構成の燃料流出防止弁の改善に関するものである。The advantages and disadvantages of the configuration of FIG. 5 and the configurations of FIGS. 6 to 8 will not be mentioned. The present invention relates to an improvement of the fuel outflow prevention valve having the structure shown in FIGS. 6 to 8.

［従来技術の問題点］ 最近の車両では艤装上燃料タンクの形状が扁平化して燃
料タンク内の燃料の蒸発面積が大きくなる傾向にあるこ
と、及びアルコールを混入したガソリン即ちガスホール
が燃料として使用されるようになったことによって、又
燃料供給にインジェクションシステムが使用されている
車両では常時燃料が燃料タンクに戻されているため、燃
料タンク内の燃料の蒸発量が増大する傾向にある。その
ため従来使用して来た第６図乃至第８図の構成の燃料流
出防止弁では弁の径ｄｍ（第６図及び第８図参照）が小
さく燃料蒸気の流れの抵抗が大きく、燃料タンク内の圧
力が過度に上昇するという問題が発生している。例えば
従来、燃料タンク内圧力が水柱800mmにおさまるように
弁径が定められていたが、同一弁径では蒸発量の増大に
よって水柱2000mm程度まで上昇する。この対策として第
９図に示すように弁の径を拡大してＤｍとすると、車両
が転倒しないのに何等かの原因によって一旦球状弁体１
４が弁座１６に着座して閉弁すると、従来と同径の球状
の重錘１８の重力では開弁不能となり、燃料タンク内で
発生した燃料蒸気は流出できなくなって極めて危険であ
るという新たな問題が発生した。これを更に具体的に述
べる。即ち例えば車両走行中の振動によって球状の重錘
１８が跳上がると、スプリング１７の力によって球状弁
体１４は弁衝部材１５を伴って押し上げられて弁座１６
に着座する。燃料タンク内の燃料蒸気圧をｐkg/m2とす
ると球状弁体１４が着座後はスプリング１７の力に加え
てπ／４Ｄ２ｐkgの閉弁力が作用し、これは弁径ｄｍの
ときの燃料蒸気圧の閉弁力π／４ｄ２ｐkgよりも大きい
から、弁径拡大前の重錘１８の重力では、重錘１８が跳
上がり後、元の位置に復帰しようとしても球状弁体１４
を押し下げて開弁させることができないことがあるのは
当然である。球状の重錘１８の径を大きくして重量を増
せば開弁可能となることも当然であるが、仮に弁径を２
倍にすると、球状の重錘１８の重量は４倍とする必要が
あり、重錘の径は 即ち１．６倍弱としなければならない。この種の燃料流
出防止弁の弁筐体１１の大きさは球状の重錘１８の大き
さによって左右されるから、球状の重錘１８の大きさに
変更を加えることなく弁径を拡大したいところである。[Problems of the prior art] In recent vehicles, the shape of the fuel tank is flattened due to outfitting, and the evaporation area of the fuel in the fuel tank tends to be large, and gasoline or gas holes mixed with alcohol is used as fuel. As a result, the fuel is always returned to the fuel tank in the vehicle in which the injection system is used for fuel supply, so that the evaporation amount of the fuel in the fuel tank tends to increase. Therefore, in the fuel outflow prevention valve of the configuration shown in FIGS. 6 to 8 which has been used conventionally, the valve diameter dm (see FIGS. 6 and 8) is small, and the flow resistance of the fuel vapor is large. There is a problem of excessive pressure rise. For example, conventionally, the valve diameter was set so that the pressure in the fuel tank would be 800 mm in the water column, but with the same valve diameter, the water column rises to approximately 2000 mm due to an increase in the evaporation amount. As a countermeasure against this, if the diameter of the valve is enlarged to Dm as shown in FIG. 9, the spherical valve element 1 is temporarily suspended for some reason even if the vehicle does not fall.
When 4 is seated on the valve seat 16 and closed, the valve cannot be opened by the gravity of the spherical weight 18 having the same diameter as the conventional one, and the fuel vapor generated in the fuel tank cannot flow out, which is extremely dangerous. Problem occurred. This will be described more specifically. That is, for example, when the spherical weight 18 jumps up due to the vibration while the vehicle is traveling, the spherical valve body 14 is pushed up together with the valve impact member 15 by the force of the spring 17, and the valve seat 16 is moved.
Sit down. When the fuel vapor pressure in the fuel tank is set to pkg / m 2 , after the spherical valve body 14 is seated, in addition to the force of the spring 17, a closing force of π / 4D 2 pkg acts, which is when the valve diameter is dm. Since the valve closing force of the fuel vapor pressure is larger than π / 4d 2 pkg, the weight of the weight 18 before the valve diameter enlargement causes the spherical valve element 14 to return to the original position after the weight 18 jumps up.
Of course, it may not be possible to push down to open the valve. Naturally, the valve can be opened by increasing the diameter of the spherical weight 18 and increasing the weight, but if the valve diameter is 2
When the weight is doubled, the weight of the spherical weight 18 needs to be quadrupled, and the diameter of the weight is That is, it should be 1.6 times less. Since the size of the valve housing 11 of this type of fuel outflow prevention valve depends on the size of the spherical weight 18, the valve diameter can be increased without changing the size of the spherical weight 18. is there.

［考案の目的］ 第６図乃至第８図に示す構成の燃料流出防止弁におい
て、球状の重錘１８の重量、従って球の径を増大させる
ことなく、実質的に弁径ｄを拡大できる弁構成を提供す
ること。[Object of the Invention] In the fuel outflow prevention valve having the structure shown in FIGS. 6 to 8, a valve capable of substantially increasing the valve diameter d without increasing the weight of the spherical weight 18, and hence the diameter of the sphere. Providing a configuration.

［考案の構成］ 燃料タンクの上部空間に連通する開口部を有し弁体が配
置されている弁室と、燃料蒸気捕集部に連通する開口部
を有し車両の転倒乃至傾斜を感知する球状の重錘が配置
されている重錘室とを有し、前記弁室と前記重錘室とを
区画する壁体の中心部を貫通する透孔が前記弁室から前
記重錘室への燃料蒸気通路を形成し、該透孔の前記弁室
側の端部に前記弁体と協同して弁作用をする弁座が形成
され、前記球状の重錘と前記弁体との間には車両が正常
な姿勢にあるとき前記球状の重錘の重力を前記弁体に伝
達して前記弁体を開弁させる弁衝部材が前記透孔と同心
に配置され、前記弁体に対して前記弁座の反対側の、前
記弁室の空間には車両の転倒乃至傾斜時、前記弁体に閉
弁力を与えるスプリングが配置されている燃料流出防止
弁において、前記弁体が第１の弁体と第２の弁体とから
なり、前記第１の弁体と前記弁座とを以て第１の弁（大
径の弁）を構成し、前記第１の弁体には前記第２の弁体
と協同して第２の弁（小径の弁）を構成する弁座が形成
され、前記第２の弁体と一体に形成又は結合された前記
弁衝部材が、前記透孔内を摺動自在の案内部材によって
案内される構成とする。[Construction of the Invention] A valve chamber having an opening communicating with the upper space of the fuel tank, in which the valve element is arranged, and an opening communicating with the fuel vapor collection unit are provided to detect a fall or tilt of the vehicle. A weight chamber in which a spherical weight is arranged, and a through hole penetrating the central portion of the wall that divides the valve chamber and the weight chamber from the valve chamber to the weight chamber. A fuel vapor passage is formed, and a valve seat that cooperates with the valve body to perform a valve action is formed at an end of the through hole on the valve chamber side, and a valve seat is formed between the spherical weight and the valve body. When the vehicle is in a normal posture, a valve impact member that transmits the gravity of the spherical weight to the valve body to open the valve body is arranged concentrically with the through hole, and the valve body is provided with respect to the valve body. A fuel outflow prevention valve in which a spring that gives a valve closing force to the valve body is arranged in the space of the valve chamber on the side opposite to the valve seat when the vehicle falls or is inclined. In the above, the valve body comprises a first valve body and a second valve body, and the first valve body and the valve seat constitute a first valve (a large diameter valve). A valve seat that forms a second valve (small-diameter valve) in cooperation with the second valve body is formed in the valve body of the second valve body, and the valve seat formed integrally with or connected to the second valve body. The member is guided by a guide member slidable in the through hole.

［実施例］ 第１図乃至第４図は本考案の実施例の構成及び作用の説
明図である。第１図において符号１０１は弁筐体であっ
て、図に示していない車両の燃料タンクの上部空間に連
通する開口部１０２を有し第１の弁体１０３と第２の弁
体１０４とからなる弁体１０５が配置されている弁室１
０６と、図に示してない燃料蒸気捕集部、例えばキャニ
スタに連通する開口部１０７を有し球状の重錘１０８が
配置されている重錘室１０９とが形成されている。１１
０は前記弁室１０６と前記重錘室１０９とを区画する壁
体であって、中心部に透孔１１１が穿設され、該透孔１
１１の前記弁室１０６側の開口端部に前記第１の弁体１
０３の球面に形成された上面と協同して弁作用をする弁
座１１２が形成されている。該弁座１１２と前記第１の
弁体１０３とを以て第１の弁即ち大径の弁（弁径Ｄ）が
構成される。１１３は前記第１の弁体１０３の下面に形
成され該第１の弁体１０３の下側に配置されている第２
の弁体１０４の平面に形成された上面と協同して、第２
の弁即ち小径の弁（弁径ｄ）を構成する、前記弁座１１
２よりも小径の弁座である。１１４は弁体１０５を閉方
向に付勢するスプリング、即ち第１の弁体１０３を弁座
１１２に、第２の弁体１０４を弁座１１３に着座させる
方向に付勢するスプリングである。前記第２の弁体１０
４は上部が大径に、下部が小径に形成されて該小径部
で、前記スプリング１１４が前記第２の弁体１０４に同
心に位置ぎめされている。１１５は車両が正常な姿勢に
あるとき、前記球状の重錘１０８の重力を前記第２の弁
体１０４に伝達する弁衝部材であって、前記第２の弁体
１０４と一体に結合、又は一体に形成され、前記第１の
弁体１０３の中心部の透孔を貫通して、該第１の弁体１
０３を摺動自在に案内すると共に、案内部材１１６の内
周面に案内され、該案内部材１１６は前記透孔１１１に
摺動自在に案内される。該案内部材１１６の下端面は前
記第１の弁体１０３の球面に形成された上面の頂部と当
接する。第２図は第１図のII−II拡大断面矢視図であっ
て、透孔１１１の内周面と案内部材１１６の花弁状に形
成された外周面との間、及び案内部材１１６の内周面
と、弁衝部材１１５の花弁状に形成された外周面との間
にはそれぞれ燃料蒸気の通路１１７及び１１８が形成さ
れている。１１９は車両が正常の姿勢にあるときの球状
の重錘１０８を安定させるための円錐面状の斜面、１２
０は燃料蒸気の通路を形成するため円錐面状の斜面１１
９に放射状に形成された溝である。次に本考案の燃料流
出防止弁の作用を上述した実施例によって説明する。[Embodiment] FIGS. 1 to 4 are explanatory views of the configuration and operation of an embodiment of the present invention. In FIG. 1, reference numeral 101 denotes a valve housing, which has an opening 102 communicating with an upper space of a fuel tank of a vehicle (not shown) and includes a first valve body 103 and a second valve body 104. Valve chamber 1 in which the valve body 105 is arranged
06 and a fuel vapor collecting portion (not shown), for example, a weight chamber 109 having an opening 107 communicating with a canister and having a spherical weight 108 arranged therein are formed. 11
Reference numeral 0 is a wall that divides the valve chamber 106 and the weight chamber 109, and a through hole 111 is formed at the center thereof.
The first valve body 1 is provided at the opening end of the valve chamber 106 on the valve chamber 106 side.
A valve seat 112 that cooperates with the upper surface formed on the spherical surface of 03 to perform a valve action is formed. The valve seat 112 and the first valve body 103 constitute a first valve, that is, a large-diameter valve (valve diameter D). Reference numeral 113 denotes a second valve which is formed on the lower surface of the first valve element 103 and which is arranged below the first valve element 103.
In cooperation with the upper surface formed on the plane of the valve body 104 of the second
Valve seat 11 which constitutes a valve of the above, that is, a valve of a small diameter (valve diameter d).
It has a smaller diameter than 2. Reference numeral 114 denotes a spring that biases the valve body 105 in the closing direction, that is, a spring that biases the first valve body 103 on the valve seat 112 and the second valve body 104 on the valve seat 113. The second valve body 10
Reference numeral 4 denotes an upper portion having a large diameter and a lower portion having a small diameter, and the spring 114 is concentrically positioned with respect to the second valve body 104 in the small diameter portion. Reference numeral 115 denotes a valve striking member that transmits the gravity of the spherical weight 108 to the second valve body 104 when the vehicle is in a normal posture, and is integrally connected to the second valve body 104, or The first valve body 1 is formed integrally and penetrates through the through hole in the center of the first valve body 103.
03 is slidably guided and guided by the inner peripheral surface of the guide member 116, and the guide member 116 is slidably guided in the through hole 111. The lower end surface of the guide member 116 contacts the top of the upper surface formed on the spherical surface of the first valve body 103. 2 is an enlarged cross-sectional view taken along the line II-II of FIG. 1 and shows a portion between the inner peripheral surface of the through hole 111 and the outer peripheral surface of the guide member 116 formed in a petal shape, and the inner portion of the guide member 116. Fuel vapor passages 117 and 118 are formed between the peripheral surface and the petal-shaped outer peripheral surface of the valve striking member 115, respectively. Reference numeral 119 denotes a conical slope for stabilizing the spherical weight 108 when the vehicle is in a normal posture, 12
0 is a conical slope 11 for forming a passage for fuel vapor
9 is a groove formed radially. Next, the operation of the fuel outflow prevention valve of the present invention will be described with reference to the above-mentioned embodiment.

［作用］ 第１図は車両が正常姿勢にあるときの状態であって、重
錘１０８は斜面１１９によって最低位置におさまってい
るから、重錘１０８の重力が弁衝部材１１５を介して第
２の弁体１０４に、又案内部材１１６、第１の弁体１０
３の重力が直接第２の弁体１０４に作用し、第２の弁体
１０４は案内部材１１６と第１の弁体１０３とを伴って
下降し、第１の弁体１０３と弁座１１２とが離れて開弁
している。従って燃料タンクの上部空間で発生した燃料
蒸気は通路１１７（第２図）を通り、重錘室１０９、開
口部１０７を通って燃料蒸気捕集部に流入する。[Operation] FIG. 1 shows a state in which the vehicle is in a normal posture. Since the weight 108 is kept at the lowest position by the slope 119, the gravity of the weight 108 passes through the valve impact member 115 to the second position. Of the valve body 104, the guide member 116, the first valve body 10
The gravity of 3 directly acts on the second valve body 104, the second valve body 104 descends together with the guide member 116 and the first valve body 103, and the first valve body 103 and the valve seat 112 move. Are open apart. Therefore, the fuel vapor generated in the upper space of the fuel tank flows through the passage 117 (FIG. 2), the weight chamber 109 and the opening 107, and flows into the fuel vapor collecting portion.

車両が転倒又は傾斜すると、重錘１０８は第３図に示す
ように重錘室１０９の片側に寄って重錘１０８の重力が
第２の弁体１０４に作用しなくなる。第１の弁体１０３
及び第２の弁体１０４が共にスプリング１１４によって
押し上げられて、第１の弁体１０３が弁座１１２に着座
し、第２の弁体１０４は最初から弁座１１３に着座して
いるから転倒，傾斜によって燃料タンク内の燃料が流出
して燃料蒸気捕集部に流入するのを防止できる。When the vehicle falls over or leans, the weight 108 approaches one side of the weight chamber 109 as shown in FIG. 3, and the gravity of the weight 108 does not act on the second valve body 104. First valve body 103
And the second valve body 104 are both pushed up by the spring 114, the first valve body 103 is seated on the valve seat 112, and the second valve body 104 is seated on the valve seat 113 from the beginning, and thus falls. The inclination can prevent the fuel in the fuel tank from flowing out and flowing into the fuel vapor collection unit.

第３図の状態は車両走行中の振動によって重錘１０８が
跳上がった場合にも起る。跳上がった後落下したとき第
４図の状態となる。重錘１０８の重力が弁衝部材１１５
に作用すると、第２の弁体１０４と弁座１１３とを以て
構成される第２の弁の弁径ｄは小さいから、燃料蒸気圧
力ｐkg/cm2によって発生する閉弁力π／４ｄ2ｐが小さ
く、第１の弁径Ｄが大きくなった分だけ重錘を大きくし
なくても、重錘１０８の重力によって第２の弁体１０４
は容易に押し下げられて、第２の弁体１０４と弁座１１
３との接触が解かれる。燃料タンクの上部空間から弁室
１０６内に導かれた燃料蒸気は弁衝部材１１５と案内部
材１１６の内周面との間に形成される通路１１８（第２
図）を通って重錘室１０９に流出して弁室１０６内の燃
料蒸気圧力ｐが低下し、第１の弁体１０３に作用する燃
料蒸気圧力ｐによる閉弁力が小さくなって第１の弁体１
０３と案内部材１１６とが自重によって第２の弁体１０
４上に落下し、第１図の状態に復帰する。The state shown in FIG. 3 also occurs when the weight 108 jumps up due to vibration while the vehicle is running. When it jumps up and then falls, the state shown in FIG. 4 is obtained. The gravity of the weight 108 causes the valve thrust member 115.
The valve diameter d of the second valve constituted by the second valve body 104 and the valve seat 113 is small, so that the valve closing force π / 4d 2 p generated by the fuel vapor pressure pkg / cm 2 is Even if the weight is small and the weight is not increased by the increase in the first valve diameter D, the weight of the weight 108 causes the second valve element 104 to move.
Is easily pushed down and the second valve body 104 and the valve seat 11
The contact with 3 is released. The fuel vapor introduced from the upper space of the fuel tank into the valve chamber 106 has a passage 118 (second passage) formed between the valve impact member 115 and the inner peripheral surface of the guide member 116.
The fuel vapor pressure p in the valve chamber 106 is decreased by passing through the drawing) to the weight chamber 109, and the valve closing force due to the fuel vapor pressure p acting on the first valve body 103 is reduced to the first value. Disc 1
03 and the guide member 116 by their own weight, the second valve body 10
4 and then returns to the state shown in FIG.

［効果］ 本考案の燃料流出防止弁は、燃料蒸気の流れの抵抗を小
さくするため弁の径を大きくしてもまず径の小さい弁を
開弁し、次に径の大きい弁を開弁することによって、重
錘の重量、従って径を増大させる必要がなく、弁筐体を
大きくしないで済むという効果があり、又逆に言えば弁
の径が同じならば弁筐体を小さくすることができるとい
う効果がある。[Effects] In the fuel outflow prevention valve of the present invention, the valve with the smaller diameter is opened first and then the valve with the larger diameter is opened even if the diameter of the valve is increased in order to reduce the resistance of the flow of fuel vapor. This has the effect that there is no need to increase the weight of the weight and hence the diameter, and it is not necessary to increase the size of the valve housing. Conversely, if the diameters of the valves are the same, the valve housing can be made smaller. The effect is that you can do it.

【図面の簡単な説明】[Brief description of drawings]

第１図から第４図に至る各図は本考案の燃料流出防止弁
の構成及び作用を説明する図、第５図は特開昭56−1512
53号の中で開示されている燃料流出防止弁の構成を示す
図、第６図から第９図に至る各図は本考案によって改良
が加えられる燃料流出防止弁の構成及び作用を説明する
図である。 符号の説明： １０１…弁筐体、 １０２…燃料タンク上部に連通する開口部、 １０３…第１の弁体、１０４…第２の弁体、 １０５…弁体（１０３と１０４の総称） １０６…弁室、 １０７…燃料蒸気捕集部に連通する開口部、 １０８…球状の重錘、１０９…重錘室、 １１０…弁室１０６と重錘室１０９との間の壁体、 １１１…透孔、１１２…弁座、１１３…弁座、 １１４…スプリング、１１５…弁衝部材、 １１６…案内部材、 １１７，１１８…燃料蒸気の通路、 １１９…円錐状の斜面、１２０…溝。1 to 4 are views for explaining the structure and operation of the fuel outflow prevention valve of the present invention, and FIG. 5 is for JP-A-56-1512.
The figure showing the structure of the fuel outflow prevention valve disclosed in No. 53, and the drawings from FIG. 6 to FIG. 9 are views for explaining the structure and operation of the fuel outflow prevention valve improved by the present invention. Is. Explanation of reference numerals: 101 ... Valve housing, 102 ... Opening part communicating with upper part of fuel tank, 103 ... First valve body, 104 ... Second valve body, 105 ... Valve body (general term of 103 and 104) 106 ... Valve chamber, 107 ... Opening part communicating with fuel vapor collecting section, 108 ... Spherical weight, 109 ... Weight chamber, 110 ... Wall between valve chamber 106 and weight chamber 109, 111 ... Through hole , 112 ... Valve seat, 113 ... Valve seat, 114 ... Spring, 115 ... Valve impinging member, 116 ... Guide member, 117, 118 ... Fuel vapor passage, 119 ... Conical slope, 120 ... Groove.

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 昭50−45710（ＪＰ，Ｕ) 実開 昭48−53616（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliographic references Sho 50-45710 (JP, U)

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項１】燃料タンクの上部空間に連通する開口部１
０２を有し弁体１０５が配置されている弁室１０６と、
燃料蒸気捕集部に連通する開口部１０７を有し車両の転
倒又は傾斜を感知する球状の重錘１０８が配置されてい
る重錘室１０９とを有し、前記弁室１０６と前記重錘室
１０９とを区画する壁体１１０の中心部を貫通する透孔
１１１が前記弁室１０６から前記重錘室１０９への燃料
蒸気通路を形成し、該透孔１１１の前記弁室１０６側の
端部に弁体１０５と協同して弁作用する弁座１１２が形
成され、前記球状の重錘１０８と前記弁体１０５との間
には車両が正常な姿勢にあるとき、前記球状の重錘１０
８の重力を前記弁体１０５に伝達して前記弁体１０５を
開弁させる弁衝部材１１５が前記透孔１１１と同心に配
置され、前記弁体１０５に対して前記弁座１１２の反対
側の、前記弁室１０６の空間には前記弁体１０５に閉弁
力を与えるスプリング１１４が配置されている燃料流出
防止弁において、前記弁体１０５が第１の弁体１０３と
第２の弁体１０４とからなり、前記第１の弁体１０３と
前記弁座１１２とを以て第１の弁（大径の弁）を構成
し、前記第１の弁体１０３には前記第２の弁体１０４と
協同して第２の弁（小径の弁）を構成する弁座１１３が
形成され、前記弁衝部材１１５は前記第２の弁体１０４
と一体に形成又は結合されて前記透孔１１１内を摺動自
在の案内部材１１６の内周面に摺動自在に案内されると
共に該内周面との間に燃料蒸気の通路１１８が形成さ
れ、前記第１の弁体１０３は中心部に透孔が穿設されて
いて前記弁衝部材１１５に摺動自在に案内されると共に
該弁衝部材１１５との間に燃料蒸気の通路１１８が形成
され、前記壁体１１０の中心部を貫通する透孔１１１と
前記案内部材１１６との間に燃料蒸気の通路１１７が形
成されている燃料流出防止弁。1. An opening 1 communicating with an upper space of a fuel tank.
02 and a valve chamber 106 in which the valve element 105 is arranged,
A weight chamber 109 having an opening 107 communicating with the fuel vapor collection unit, and a spherical weight 108 for detecting a vehicle tipping or tilting, and a valve chamber 106 and the weight chamber. A through hole 111 penetrating a central portion of a wall body 110 that separates from the valve 109 forms a fuel vapor passage from the valve chamber 106 to the weight chamber 109, and an end portion of the through hole 111 on the valve chamber 106 side. A valve seat 112 that cooperates with the valve body 105 to form a valve is formed, and when the vehicle is in a normal posture between the spherical weight 108 and the valve body 105, the spherical weight 10
A valve impact member 115 for transmitting the gravity of 8 to the valve body 105 to open the valve body 105 is arranged concentrically with the through hole 111, and is provided on the opposite side of the valve seat 112 with respect to the valve body 105. In a fuel outflow prevention valve in which a spring 114 that gives a valve closing force to the valve body 105 is arranged in the space of the valve chamber 106, the valve body 105 includes a first valve body 103 and a second valve body 104. The first valve body 103 and the valve seat 112 constitute a first valve (a large-diameter valve), and the first valve body 103 cooperates with the second valve body 104. And a valve seat 113 forming a second valve (small-diameter valve) is formed, and the valve impact member 115 serves as the second valve body 104.
Is integrally formed with or connected to the inner peripheral surface of the slidable guide member 116 in the through hole 111, and a fuel vapor passage 118 is formed between the inner peripheral surface and the inner peripheral surface. The first valve element 103 is provided with a through hole in the center thereof and is slidably guided by the valve impact member 115, and a fuel vapor passage 118 is formed between the first valve element 103 and the valve impact member 115. A fuel outflow prevention valve in which a fuel vapor passage 117 is formed between the guide member 116 and the through hole 111 penetrating the central portion of the wall 110.
JP1987004936U 1987-01-19 1987-01-19 Fuel outflow prevention valve Expired - Lifetime JPH0618085Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1987004936U JPH0618085Y2 (en) 1987-01-19 1987-01-19 Fuel outflow prevention valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1987004936U JPH0618085Y2 (en) 1987-01-19 1987-01-19 Fuel outflow prevention valve

Publications (2)

Publication Number Publication Date
JPS63115966U JPS63115966U (en) 1988-07-26
JPH0618085Y2 true JPH0618085Y2 (en) 1994-05-11

Family

ID=30786061

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1987004936U Expired - Lifetime JPH0618085Y2 (en) 1987-01-19 1987-01-19 Fuel outflow prevention valve

Country Status (1)

Country Link
JP (1) JPH0618085Y2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100333861B1 (en) * 1999-08-06 2002-04-25 류정열 A float valve used in a fuel supply system of an automobile

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4710126U (en) * 1971-02-24 1972-10-06
JPS4853616U (en) * 1971-10-15 1973-07-11
JPS5249778Y2 (en) * 1973-08-24 1977-11-11

Also Published As

Publication number Publication date
JPS63115966U (en) 1988-07-26

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