1356124 _ 第97106416號專利申請案 100年8月22日修正替換頁 九、發明說明： 【發明所屬之技術領域】 本發明係關於將燃料箱内的燃料壓送到車輛用之内燃 機的喷射器等之車輛用燃料供給裝置，詳言之，係關於提 高該裝置的維護性之構造。 【先前技術】 先前技術在捕捉燃料中所含之塵埃等夾雜物，將燃料 穩定供給至安裝於例如引擎之燃料喷射裝置的喷射器 (injector)這一方面，廣為人知者係藉由燃料泵的吸入口所 具備的例如尼龍等的篩網所構成之網目較大的過濾器 (strainer)，首先將燃料箱内的夾雜物予以去除。然後，對 於通過該過濾器之夾雜物’或者含有在構成燃料泵之馬達 部產生之電刷（Wh)、整流子（eGmmuta㈣等的磨耗粉之 夾雜物，利用配設在燃料泵的下游侧（表示就燃料通路來看 ，燃料粟的τ—段）之高廢過濾器（仙岭例如紙製的過滤 單元來加以捕捉。 〜 然而’前述過濾器係位於燃料供給中之所謂最上游的 位置，為了在燃料箱内的燃料少時也能進行供給，一般而 言係使前述過濾器位在該燃料箱的最底部。辦料少時，又即 使油面因為加減速或姿勢變化而變化，燃料泵也能夠 影響而確實地吸㈣料，此點受到特別是機動二輪車（例如 摩托車等之二輪車輛）所要求\絲要求料㈣是為了防 止.減速時或是下坡行走時，剩得很少的燃料往燃料箱前 方移動’«110而從_的㈣露出，之後即使踩油門， 319986修正本 5 1356124 第97106416號專利年請案 100年8月22日修正替換頁 敬 L ιυυ干a月以日修正朁; 、也不會升尚而無法加速之所謂的引擎喘自（吸不 ^油）現—象。因此，有如下所述之技術曾經揭示：從燃料 供給系統回來的剩餘燃料保持在燃料保持室，並藉由連通 手段使燃料保持室所保持的燃料流通至過滤器收納室，夢 ^即使在燃料泵因為車輛的姿勢變化等而無法經由過滤 裔而吸引到燃料箱内的燃料之狀態，也可以使燃料從辦料 保持室流通到過濾、器收、納室，而毫無阻礙地將燃料供給至 内燃機的燃料供給系統（參照例如專利文獻〗）。 — 文獻1係在其裝置中組裝人周知之所謂壓力調 即态（preSSUre regulat〇r)，亦即將燃料泵吐出的燃料的壓力 保持在預定值，且將保持在預定值的結果而多餘的燃料從 吐出口排出之壓力調節器，然:而，考慮到燃料供給系統的 2局（layout)、裴置外形尺寸的限制、或者將剩餘燃料用的 官路（亦即回流管（return pipe))配設在燃料箱的外部所能得 到的剩餘燃料的冷卻效果等各點的情況，將壓力調節器配 設在燃料箱外的作法亦廣為人知。在此種情況中，也還是 著眼於剩餘燃料，使回流管沿著燃料箱的底面吐出燃料， 利用此吐出所產生的負壓將燃料箱底面的燃料引導到副油 箱（subtank)，使之具備所謂的喷射泵(jetpump)機能，L且 將利用該喷射泵機能而蓄積在副油箱的燃料，蓄積在嗖有 止回閥使燃料不會洩漏到副油箱外之一室、以及另一室， 並藉由在引擎啟動的同時使兩室間相連通的電磁闕，而毫 無阻礙地供給燃料（參照例如專利文獻2) ^ 笔 (專利文獻1) WO2006/134641號公報（第5頁第25行至 319986修正本 6 1356124 第97106416號專利申請案 100年8月22日修正替換^ * 第6頁第2行、第5圖） 一' -(專利文獻2)日本特開平3_25376〇號公報（第2〇段落第 15行至第23段落第12行、第丨圖） 【發明内容】 (發明所欲解決之課題） 一般而言，在機動二輪車的情況，除了燃料箱的高度 方向的限制外，有鑒於加速時燃料會偏向後方，還必須符 合希望儘可能地將包含過滤器的燃料泵配置到燃料箱的後 方之期望’此點與近年來日益加速薄形化之燃料箱的形狀 相付也與下述之現狀相關：亦即使車輛的框架通過燃料 箱的長度方向的大致f心會導致燃料箱形狀之鞍形化為 了避開該鞍形部分而不得已配設到燃料箱的後方之現狀。 因此，就機動二輪車而言，在考慮到乘坐者的姿勢之情況， 毋庸說，會要求通往喷射器之供給管路，亦即輸送管及回 流管佈設在專利文獻2之第1圖紙面上的下方，而非上方， 換言之，會採取專利文獻j之第5圖所示的佈局（1叮〇以）。 在此情況，進行車輛的維護等而將燃料箱拆下之際， 由於回流管位在比燃料箱低的位置，因此從回流管將通往 例如噴射器的軟管（hose)拆下，必然會發生因為所謂的虹 吸現象而使得燃料箱，尤其是副油箱内的燃料通過回流管 而漏出之問題，不過現狀是對此問題並沒有报好的辦法。 本發明係有鑑於上述問題而完成者，其目的在獲得一 種即使固接在一凸緣部（封閉燃料箱底部的開口之凸緣部） 的回流管開口後，燃料也不會從該開口洩漏之車輛用燃料 319986修正本 7 1356124 - 第97106416號專利申請案 100年8月22日修正替換頁 - 供給裝置。 」· <：解_決課題之手段） 本發明之車輛用燃料供給裝置，係具備有：經由過濾 器（strainer)將燃料箱的燃料予以吸入，並在昇壓後予以吐 出之燃料泵；收容該燃料泵之泵箱（pump case);填裝於上 述燃料箱的開口部，將從上述燃料泵吐出的燃料供給到内 燃機的燃料供給系統之輸送管（delivery pipe);以及固接有 回流管（return pipe)及撐條（stay)之凸緣部，其中該回流管 係讓未在上述内燃機的燃料供給系統消耗掉的剩餘燃料回 到上述燃料箱者，該樓條係供安裝上述泵箱者，上述剩餘 燃料用的流路係設於上述泵箱，而且，在上述回流管與上 述剩餘燃料用的流路之間，存在有由液密地固接於上述回 流管之喷嘴部及上述泵箱所具備的喉部（throat)所構成的 喷射泵(jet pump)，且在上述喷嘴部配設有燃料止回閥 (check valve)者。 (發明之效果） 本發明係如以上的說明，藉由將壓力調節器配設在燃 料箱外，而可提供伴隨著剩餘燃料的冷卻效果之燃料泵吐 出性能的提昇、以及維護性可兩立之尤其適合於機動二輪 車之車輛用燃料供給裝置。 【實施方式】 實施形態1 第1圖係本發明實施形態1之車輛用燃料供給裝置（以 下稱為燃料供給裝置）之外觀斜視圖，第2圖係顯示將第1 8 319986修正本 1356124 第97106416號專利申請案 100年8月22曰修正替換頁 -圖之燃料供給裂置設置於，例如機動二輪車的燃料箱 .·—的内部之狀態的斷面圖。 第2圖中，本發明實施形態丨之燃料供給裝置ι〇ι， 係透過襯墊（packing)2及凸緣部3以螺栓4固定在設於機 動二輪車之燃料箱i的底部la之開口部lb。如第2圖所 示，在燃料箱1中燃料5充滿到油面5a的情況，燃料5 亦充滿到泵箱6,此燃料如後所述，通過吸入過濾器（過濾 器）7(參照第3圖）而由燃料泵8加壓後予以吐出，此吐出 的燃料經過高壓過濾器9,而由固接於凸緣部3之輸送管 1〇供給至未圖示之内燃機的燃料供給系統。在内燃機的燃 料供給系統中，藉由例如壓力調整器將燃料保持在預定的 壓力，在此保持動作下剩餘，亦即未消耗掉燃料，會通過 固接在凸緣部3之回流管u，再回到燃料供給裝置1〇1， 此「剩餘燃料之回流」即為本發明的本質部份。 如第1圖所示，燃料供給裝置1〇1從其外觀面可大致 區分為.凸緣部3 ;以溝槽6a嵌合於固接在該凸緣部3之 撐條12,朝紙面上的下方滑動而與凸緣部3抵接之例如絕 緣树月曰製的泵箱6 ;以溝槽i a喪合於樓條12，同樣朝 紙面上的下方滑動而與泵箱6抵接之例如絕緣性樹脂製的 過濾器箱13 ;液密地固接於回流管n而載置於預定的位 ，，且藉由如上所述之泵箱6與凸緣部3之抵接，而由泵 箱6加以卡合之例如絕緣性樹脂製的喷嘴部1 * ;以及為了 ，***之s亥泵箱6及過濾器箱13固定於紙面上的位置（以 谷易了解的方式說，係防止朝上方之拔脫），而覆 蓋在過濾 9 319986修正本 ^56124 第97106416號專利申請案 _1〇〇年8月22日修正替換頁 器箱13的上面，且以螺辞15 (St_16。 螺接於偉條12之擋止件 在此’根據將第1圖中系箱6的—a 第3圖，針對機能面進行㈣。切去而繪製的 ㈣與吸入過遽器二:二的内部設有分隔燃 的上方***眩《 77隔壁6b，將燃料泵8從紙面上 的上方***，將吸入過濾器7從紙面上 吸入過遽器7液密地安裝於燃料果8之未圖 ，，將 後，如前所述，將喷嘴部14載置収位=:人 於揮條12。另-方面，亦如前所述，將輸送管：固接至° 二：Γ隻並:Γ藏有高壓過遽器9之過遽器箱13嵌合於 以及燃…之™液 衣j °又於過濾器箱13之對應的孔。 輸送管10及回流答丨& 4‘*,丄t s 11係在紙面上凸緣部3的下部彎 ’與凸緣部3平行’且其前端加工成為連接部10a 未圖以^接到未圖示之内燃機的嘴射器㈣叫之同樣 = = 可以容易地裝拆。另外，燃料栗8之 ==16係連接到凸緣部3所具備之未圖示的連接 Α由該連接器而連接到同樣未圖示之控制電路或電 連接：:==2101的動作進行說明。通過 β絲泵予以驅動時，燃料泵8之未圖示的葉輪 疋，使得燃料箱1内的燃料5在吸入過減器7去掉 雜物後進入揪料！ s 〜器7去除掉夾 ^加以吐出:==j果8予以加壓，再從吐出部 …、後，從吐出部8a吐出的燃料，由高壓過 319986修正本 10 100年8月22日修正替換頁 濾器9將其中通過吸入過渡器7之夾雜物，或者含有在構 成燃料栗8之未圖示的馬達部產生之電刷、整流子等的磨 耗粉之夾雜物加以捕捉後，經由輸送管1〇以及軟管(h〇se) 而供給至内燃機之喷射器。 在，，根據第3圖簡單說明將燃料5導入吸入過濾器 過g相6具有栗收納部&及燃料儲存槽&，如 燃料5係充滿在此粟收納部6c及燃料儲存槽Μ中。 = =6c的底部(亦即分隔壁峋及燃料儲存槽Μ的底 於兮連通孔6、通過此連通孔^而到達吸人過攄器7。關 於该連通孔6e的形狀、數日莖 號公報(相當於本的有 略二步:說:該連通孔6e並非本案的重要部份，因此省 而到喷:器消耗掉的燃料，係通過回流管η 相對之喷= /:: 14具備有與泵箱6之喉部Μ (剩餘婵料用的、 該喉部6g係位在設於泵箱6之 的下部，然而，當燃料5的油 下降，就會由於喷射孔2〇a的 嘴部14附近的燃料5 、射而產生負昼’將嘴 及燃料儲存样Μ 路紆而送入泵收納部6c 假設由於車體傾斜等而使得吸=下降之情況’ 續將燃料供給到喷射器。：;露出’也能夠持 部4來構成周知的喷射^。就疋利用喷嘴部Η及喉 319986修正本 11 *1356124 第97106416號專利申請案 1〇〇年8月22日修正替換頁 • 接著根據第1圖詳細說明上述通過回流流路6f而將 ·燃料5送入栗收納部6c及燃料儲存槽6d之内容。回流流 ，路6f係設在泵箱6的軸方向上’燃料5會一次沿此回流流 路6f而朝,,、氏面上刖頭所示方向上升。回流流路^的上部 具備有分別與泵收納部6c及燃料儲存槽6d相連通之切縫 (sht^hl，6h2,通過此切縫6Μ，仙2使燃料5儲存於泵箱& 中。此處要說明的是，本實施形態中，係藉由到達果收納 部6c及燃料儲存槽6d的底部之區隔壁&(同時參照第3 圖），而將泵收納部6c及燃料儲存槽“區隔開來，'此點， 如同到此為止之說明所清楚表示的，係因為在構造上將過 濾器箱13配置在泵收納部6c的上部，因此基於將泵收納 部6c之用於燃料儲存之機能加以備份（backup)之想法，而 設置轴方向的高度與過濾器箱13大致一致之燃料儲存槽 6d，以防止如前面[先前技術]中所述的二輪車特有的課 題，亦即引擎的喘息現象之發生。因此。將符號6d所代表 之部分稱為「燃料儲存槽」。 接下來，根據第4及第5圖說明本案之重要部份亦即 喷射泵18的構造。第4圖係燃料供給裝置的斷面圖，第5 圖係構成喷噶部的一部件亦即喷嘴蓋（n〇ZZle Cap)的外觀 斜視圖。 如前所述’噴射泵18係由喷嘴部14及喉部6g所構 成，其中’喷嘴部14係如第4圖所示，由：透過〇形環 19而液密地固接於回流管η之喷嘴體2〇 ;以與該噴嘴體 20之前述的喷射孔20a相對的方式安裝於喷嘴體2〇之燃 12 319986修正本 •1356124 第97106416號專利申請案 | 100年8月22曰修正替換頁' ;止回間2】；以及從喷嘴體20的開口部20b將該燃料止 回閥h安裝上後，透過〇形環24而液密地將該開口部2仙 予乂封閉之喷嘴蓋22所構成。其尹燃料止回間2】如盆名， 係防止燃料逆流者，具體言之，係具有在紙面上的右方向 上使燃料5通過（前述之朝回流流路6f之送入），在左方向 上不使燃料5通過之機能，只要是由例如鴨嘴（duckb叫 狀的橡膠所構成之周知的止回閥即可。 將該燃料止回閥21液密地插接於喷嘴體2〇的筒部 二c後，為了防止此插接鬆開，亦即防止燃料止回閥幻脫 洛+，而以如前述之噴嘴蓋22封閉開口部2〇b，同時利用噴 嘴蓋22的端面22a抑制燃料止回閥21的移動。噴嘴蓋u 係以例如絕緣性樹脂形成，且如第5圖所示，具備有：上 述之端面22a;成為剩餘燃料的流路之槽縫（siit)22b;封閉 開口部20b之蓋部22c;以及從該蓋部22。延設，用以與 設在噴嘴體20之未圖示的扣合凸部作卡扣（snap叫嵌合 之扣合凹部22d。換言之，兼具有封閉供上述燃料止回^ 21插接用的開口部2〇b以及抑制燃料止回閥21的移動之 機能，同時具有確保剩餘燃料的流路之形狀。 從第4圖可清楚看出，燃料止回閥21與噴嘴蓋η係 配置在同軸上。此係要藉由將兩構件配置在同轴上，而有' 效地抑制燃料止回閥21的移動，以防範前述燃料$往紙面 上左方之流出於未然。因此，在車輛的維護等中，從回流 管11將軟管拆下，燃料5也不會通過回流管u而漏出: 不會對維護作業造成任何阻礙。因而’可提供除了不會發 319986修正本 13 •1356124 -第97106416號專利申請案 100年8月22日佟正替換頁 * 生引擎之喘息現象之高可靠性外，還具備有提高維護性之 -· 良好的附加價值之燃料供給裴置。 實施形態2 > 開口部20b之封閉，可考慮固接、壓入等手段，惟考 量到作業的容易性、以及防止剩餘燃料之壓力上升所致之 脫落等點，因此以利用卡扣（snap fit)之嵌合作為實施形態 1而說明如上。實施形態2中，將針對著眼於上述剩餘燃 料之壓力上升，使可靠性更加提高之燃料供給裝置進行說 明。第6圖係本實施形態2中與第4圖相當之圖。 如第6圖所示，本實施形態2中，係使蓋部22c的空 間中具備有洩壓閥（relief valve)23。洩壓閥23係周知之所 謂的燃料釋放閥，當剩餘燃料的壓力超過預定值時，閥23c 會抵抗彈簧23b的彈壓而向紙面上左方移動，藉此形成用 以釋放燃料之排出孔。換言之，剩餘燃料的壓力超過預定 值的話’就會在該洩壓閥23將剩餘燃料朝紙面上箭頭方向 排出’藉此而可將包含回流管Π之剩餘燃料路徑中的壓力 保持一定。因此，可提供除了實施形態1的效果之外，還 有助於更加提高内燃機之燃料供給系統全體的可靠性之燃 料供給裝置。 【圖式簡單說明】 第1圖係本發明實施形態1之燃料供給裝置的外觀斜 視圖 第2圖係顯示將第1圖之燃料供給裝置設置於車輛， 例如機動二輪車的燃料箱的内部之狀態的斷面圖。 14 319986修正本 川 6124 第3圖係將第i 0 第9<7106416號專利申諳牵 視圖 圖中泵箱的一 -部份切掉所見之外觀斜 【主 第4圖係本發明實施形態1之燃料供給赵 ^ - |^1 斷面圖 〇 第5圖係本發明實施形態i中之喷嘴蓋的外 第6圖係本發明實施形態2中與第4圖相’寻Θ° 要元件符號說明】 田之圖。 1 燃料箱 la 底部 lb 開口部 2 襯塾 3 凸緣部 4 螺栓 5 燃料 5a 油面 6 泵箱 6a，13a溝槽 6b 分隔壁 6c 泵收納部 6d 燃料儲存槽 6e 連通孔 6f 回流流路 6g 喉部 6hl，6h2 切縫 6i 區隔壁 7 吸入過濾器 8 燃料泵 8a 吐出部 9 高壓過濾器 10 輸送管 10a，11a 連接部 11 回流管 12 撐條 13 過濾器箱 14 喷嘴部 15 螺絲 16 擋止件 18 喷射泵 19, 24 〇形環 20 喷嘴體 20a 喷射孔 20b 開口部 20c 筒部 319986修正本 15 •1356124 第97106416號專利申請案 100年8月22曰修正替換頁 21 燃料止回閥 22 喷嘴蓋 22a 端面 22b 槽缝 22c 蓋部 22d 卡合凹部 23 洩壓閥 23a 閥 23b 彈簧 101 燃料供給裝置 16 319986修正本1356124 _ Patent No. 97106416, the entire disclosure of the patent application, the disclosure of the present invention, the disclosure of the present invention, the present invention relates to an ejector for pumping fuel in a fuel tank to an internal combustion engine for a vehicle, etc. The vehicle fuel supply device is, in detail, a structure for improving the maintainability of the device. [Prior Art] The prior art captures impurities such as dust contained in fuel to stably supply fuel to an injector mounted to a fuel injection device such as an engine, and is widely known as a suction by a fuel pump. A strainer having a large mesh, which is composed of a mesh such as nylon, which is provided in the mouth, first removes inclusions in the fuel tank. Then, the inclusions passing through the filter or the inclusions containing the brush (Wh) and the commutator (eGmmuta (four)) generated in the motor portion of the fuel pump are disposed on the downstream side of the fuel pump ( In the case of the fuel passage, the high-purification filter of the fuel mill's τ-segment) is captured by a filter unit such as paper. However, the filter is located in the so-called most upstream position in the fuel supply. In order to supply the fuel in the fuel tank, the filter is generally placed at the bottom of the fuel tank. When the material is small, even if the oil surface changes due to acceleration/deceleration or posture change, the fuel The pump can also influence (4) the material, which is required by the motor-driven two-wheeled vehicle (such as a two-wheeled vehicle such as a motorcycle). The wire is required to prevent the vehicle from decelerating or walking downhill. Less fuel moves to the front of the fuel tank '«110 and is exposed from _ (four), even after stepping on the throttle, 319986 amend this 5 1356124 patent 97106416 patent year request for August 22, 100 correction replacement Page LL ιυυ干 a month to correct 朁;, will not rise and can not accelerate the so-called engine whip (sucking no oil) now-like. Therefore, the following techniques have been revealed: from fuel The remaining fuel returned from the supply system is held in the fuel holding chamber, and the fuel held by the fuel holding chamber is circulated to the filter accommodating chamber by the communication means, and even if the fuel pump is unable to pass the filter by the posture change of the vehicle or the like The state of the fuel sucked into the fuel tank can also be such that the fuel is circulated from the material holding chamber to the filter, the receiver, and the chamber, and the fuel is supplied to the fuel supply system of the internal combustion engine without any hindrance (see, for example, Patent Document). - Document 1 is a so-called pressure-regulating state (preSSUre regulat〇r) known in its installation, that is, the pressure of the fuel pumped by the fuel pump is kept at a predetermined value and will remain at a predetermined value and is redundant. a pressure regulator that discharges fuel from the discharge port, but considers the layout of the fuel supply system, the size of the device, or the remaining fuel. It is also known that the way in which the pressure regulator is disposed outside the fuel tank is known in the case where the road (that is, the return pipe) is disposed at various points such as the cooling effect of the remaining fuel that can be obtained outside the fuel tank. In this case, attention is also paid to the remaining fuel, and the return pipe discharges fuel along the bottom surface of the fuel tank, and the fuel generated on the bottom surface of the fuel tank is guided to the subtank by the negative pressure generated by the discharge, so that the so-called injection is provided. The pump (jetpump) function, L, will use the jet pump function to accumulate fuel in the auxiliary tank, accumulate in a chamber with a check valve so that the fuel does not leak into the chamber outside the auxiliary tank, and in another chamber, and in the engine The electromagnet that communicates between the two chambers is activated at the same time, and the fuel is supplied without any hindrance (see, for example, Patent Document 2) ^ Pen (Patent Document 1) WO2006/134641 (page 5, line 25 to 319986, revision) 6 1356124 Patent application No. 97106416, revised on August 22, 100, replaces ^ * page 6, line 2, figure 5) - 'Patent Document 2> Japanese Patent Laid-Open No. 3_25376 No. 2 (paragraph 2) 15 lines to 2 3 paragraphs, line 12, and drawings) [Summary of the Invention] In general, in the case of a motorcycle, in addition to the limitation of the height direction of the fuel tank, the fuel is biased toward the rear in view of acceleration. It must also meet the expectation that the fuel pump containing the filter should be disposed as far as possible behind the fuel tank. This point is related to the shape of the increasingly accelerated fuel tank in recent years. Even if the frame of the vehicle passes through the substantially f-center of the length direction of the fuel tank, the saddle shape of the fuel tank shape may be undesired to the rear of the fuel tank in order to avoid the saddle portion. Therefore, in the case of a motorcycle, in consideration of the posture of the occupant, it is needless to say that the supply line to the ejector is required, that is, the conveying pipe and the return pipe are disposed on the first drawing surface of Patent Document 2. Below, not above, in other words, the layout shown in Figure 5 of Patent Document j (1). In this case, when the fuel tank is removed for maintenance of the vehicle or the like, since the return pipe position is lower than the fuel tank, the hose leading to, for example, the ejector is removed from the return pipe, which is inevitable. There is a problem that the fuel tank, especially the fuel in the auxiliary fuel tank, leaks through the return pipe due to the so-called siphon phenomenon, but the current situation is that there is no good way to report this problem. The present invention has been made in view of the above problems, and an object thereof is to obtain a fuel which does not leak from the opening even after being fastened to a return pipe opening of a flange portion (the flange portion of the opening closing the bottom of the fuel tank) The vehicle fuel 319986 is amended by the method of the present invention, which is incorporated herein by reference. The vehicle fuel supply device of the present invention includes a fuel pump that sucks fuel of a fuel tank through a strainer and ejects it after boosting; a pump case for accommodating the fuel pump; and a fuel pipe that is supplied from the fuel pump to a delivery pipe of a fuel supply system of the internal combustion engine; and a recirculation valve a return pipe and a flange portion of the stay, wherein the return pipe is for returning the remaining fuel that is not consumed in the fuel supply system of the internal combustion engine to the fuel tank, and the floor is for installing the pump In the tank, the flow path for the remaining fuel is provided in the pump box, and between the return pipe and the flow path for the remaining fuel, there is a nozzle portion that is liquid-tightly fixed to the return pipe and A jet pump composed of a throat provided in the pump box, and a fuel check valve is disposed in the nozzle portion. (Effects of the Invention) As described above, the present invention can provide an improvement in the discharge performance of the fuel pump accompanying the cooling effect of the remaining fuel and the maintenance performance by providing the pressure regulator outside the fuel tank. It is particularly suitable for a vehicle fuel supply device for a motorcycle. [Embodiment] FIG. 1 is a perspective view showing the appearance of a fuel supply device for a vehicle (hereinafter referred to as a fuel supply device) according to Embodiment 1 of the present invention, and FIG. 2 is a view showing a modification of the first 8 319 986. Patent Application No. Aug. 22, pp. 22, pp., pp., pp., pp. In the second embodiment, the fuel supply device ι〇ι of the embodiment of the present invention is fixed to the opening of the bottom portion la of the fuel tank i provided in the motorcycle by the bolts 4 through the packing 2 and the flange portion 3. Lb. As shown in Fig. 2, in the case where the fuel 5 is filled in the fuel tank 1 to the oil level 5a, the fuel 5 is also filled into the pump box 6, and this fuel passes through the suction filter (filter) 7 as described later (refer to 3)), the fuel pump 8 is pressurized, and then discharged, and the discharged fuel passes through the high-pressure filter 9, and is supplied to the fuel supply system of the internal combustion engine (not shown) by the transfer pipe 1A fixed to the flange portion 3. In the fuel supply system of the internal combustion engine, the fuel is maintained at a predetermined pressure by, for example, a pressure regulator, and remains in the holding operation, that is, the fuel is not consumed, and is passed through the return pipe u of the flange portion 3, Returning to the fuel supply device 1〇1, the "return of residual fuel" is an essential part of the invention. As shown in Fig. 1, the fuel supply device 1〇1 can be roughly divided into a flange portion 3 from its outer surface; the groove 6a is fitted to the stay 12 fixed to the flange portion 3 toward the paper surface. The pump box 6 which is slid downward and abuts against the flange portion 3, for example, is insulated from the pump box 6; the groove ia is slid to the floor 12, and is slid toward the lower side of the paper surface to abut the pump box 6, for example The filter case 13 made of an insulating resin is fixed to the return pipe n in a liquid-tight manner and placed at a predetermined position, and is abutted by the pump box 6 and the flange portion 3 as described above, and is pumped by the pump The nozzle portion 1 to which the case 6 is engaged is, for example, an insulating resin; and the position where the inserted pump box 6 and the filter case 13 are fixed to the paper surface (in the manner known by the valley, it is prevented from The upper part is unplugged, and the cover is covered in the filter. 9 319986, the patent application No. 56124, the patent application No. 97106416, the upper page of the replacement page box 13 is corrected on August 22, and the thread is 15 (St_16. The stopper of Yu Wei 12 is here (according to the figure 3 of the box 6 in Fig. 1 , the function surface is carried out (4). The cut (4) and the inhalation are drawn. 2: The inside of the second is provided with a partitioned upper glare "77 partition 6b, the fuel pump 8 is inserted from above the paper surface, and the suction filter 7 is sucked from the paper by the suction device 7 to be liquid-tightly attached to the fuel fruit. 8 is not shown, after that, as described above, the nozzle portion 14 is placed in the position =: the person is in the swing 12. On the other hand, as described above, the conveying pipe is fixed to the ° 2: Γ 并 Γ Γ Γ Γ Γ Γ Γ Γ 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压 高压4'*, 丄ts 11 is a lower portion of the flange portion 3 on the paper, which is bent in parallel with the flange portion 3, and the front end thereof is processed to be a connecting portion 10a (not shown). It is also possible to attach and detach the same ==, and the fuel pump 8 == 16 is connected to the flange (not shown) provided in the flange portion 3, and is connected to the control circuit (not shown) by the connector. Or the operation of the electrical connection::==2101. When the β-wire pump is driven, the impeller (not shown) of the fuel pump 8 causes the fuel 5 in the fuel tank 1 to be After entering the reducer 7 to remove the foreign matter, it enters the dip! s ~ 7 removes the clip ^ and discharges it: ==j The result is pressurized, and then the fuel discharged from the discharge portion 8a is discharged from the discharge portion 8a. High Pressure 319986 Amendment 10Aug. 22, 100, the correction replacement page filter 9 incorporates the inclusions in the suction transition device 7 or the brushes, commutators, etc. generated in the motor portion (not shown) constituting the fuel pump 8 After the inclusions of the abrasion powder are captured, they are supplied to the injector of the internal combustion engine via the transfer pipe 1〇 and the hose. The fuel 5 is introduced into the suction filter through the g phase according to the description of Fig. 3 6 has a chest storage portion & and a fuel storage tank & the fuel 5 is filled in the mill storage portion 6c and the fuel storage tank. The bottom of the ==6c (that is, the bottom of the partition wall and the fuel storage tank 兮 is connected to the 兮 communication hole 6 through the communication hole 。. The shape of the communication hole 6e, the number of days of the stem Bulletin (corresponding to this, there are two steps: saying: the communication hole 6e is not an important part of the case, so the fuel consumed by the sprayer is saved by the return pipe η relative to the spray = /:: 14 There is a throat Μ with the pump box 6 (the remaining portion of the throat 6g is located at the lower part of the pump box 6, however, when the oil of the fuel 5 drops, it will be due to the injection hole 2〇a The fuel 5 in the vicinity of the mouth 14 generates a negative 昼 'The nozzle and the fuel storage sample are conveyed to the pump accommodating portion 6c. It is assumed that the suction/fall is caused by the inclination of the vehicle body, etc.' The device can be used to hold the part 4 to form a well-known spray. ^ Use the nozzle section and the throat 319986 to correct this 11 *1356124 Patent Application No. 97106416, revised August 22, 2011 Next, the fuel 5 is sent to the chestnut accommodating portion 6c and the fuel storage through the return flow path 6f as described in detail with reference to Fig. 1 . The content of the groove 6d. The return flow, the path 6f is provided in the axial direction of the pump box 6. 'The fuel 5 will be directed toward the return flow path 6f at a time, and rises in the direction indicated by the boring head on the surface of the pump. The upper portion is provided with a slit (sht^hl, 6h2) which communicates with the pump accommodating portion 6c and the fuel storage tank 6d, respectively, and the fuel 5 is stored in the pump box & through the slit 6 。. In the present embodiment, the pump housing portion 6c and the fuel storage tank are "separated" by the partition wall & (see also FIG. 3) which reaches the bottom of the fruit storage portion 6c and the fuel storage tank 6d. In this regard, since the filter case 13 is disposed in the upper portion of the pump accommodating portion 6c in terms of the structure, it is based on the function of the pump accommodating portion 6c for fuel storage. With the idea of backing up, a fuel storage tank 6d having a height in the axial direction substantially the same as that of the filter box 13 is provided to prevent the problem of the unique problem of the two-wheeled vehicle as described in the prior [prior art], that is, the breathing phenomenon of the engine. Occurs. Therefore, the part represented by the symbol 6d is called "burning". Next, the structure of the jet pump 18, which is an important part of the present invention, will be described based on the fourth and fifth figures. Fig. 4 is a cross-sectional view of the fuel supply device, and Fig. 5 is a view of the squirting portion. The component is also a perspective view of the nozzle cover (n〇ZZle Cap). As described above, the jet pump 18 is composed of a nozzle portion 14 and a throat portion 6g, wherein the nozzle portion 14 is as shown in Fig. 4 The nozzle body 2 is liquid-tightly fixed to the nozzle body 2 through the ring-shaped ring 19; the nozzle body 2 is mounted on the nozzle body 2 so as to face the injection hole 20a of the nozzle body 20; 1356124 Patent Application No. 97106416 | Aug. 22, pp. 22, pp. 32; correction of the replacement page 2; and the installation of the fuel check valve h from the opening 20b of the nozzle body 20, through the 〇 ring 24 The nozzle cover 22 in which the opening portion 2 is closed is liquid-tightly closed. The Yin fuel check room 2] is a pot name, which is to prevent fuel from flowing backwards. Specifically, the fuel 5 is passed in the right direction on the paper surface (the aforementioned return flow to the return flow path 6f), on the left The function of not passing the fuel 5 in the direction is as long as it is a well-known check valve composed of, for example, a duckbill (a rubber-like rubber). The fuel check valve 21 is liquid-tightly inserted into the nozzle body 2 After the tubular portion 2c, in order to prevent the insertion of the plug, that is, to prevent the fuel check valve from being detached, the opening 2b is closed by the nozzle cover 22 as described above, while the end face 22a of the nozzle cover 22 is used to suppress The movement of the fuel check valve 21. The nozzle cover u is formed of, for example, an insulating resin, and as shown in Fig. 5, the end surface 22a is provided, and a slit (22) which is a flow path of the remaining fuel; a lid portion 22c of the opening portion 20b; and a lid portion 22 extending from the lid portion 22 for engaging with a snap protrusion portion (not shown) provided in the nozzle body 20 (in other words, a snap-fit recess portion 22d). And having an opening portion 2〇b for closing the fuel check 21 and the fuel check valve 2 The function of the movement of 1 has the shape of the flow path for ensuring the remaining fuel. As is clear from Fig. 4, the fuel check valve 21 and the nozzle cover η are arranged coaxially. This is achieved by arranging the two members. On the coaxial side, the movement of the fuel check valve 21 is effectively suppressed to prevent the aforementioned fuel from flowing out to the left of the paper. Therefore, in the maintenance of the vehicle or the like, the hose is fed from the return pipe 11. With the fuel removed, the fuel 5 will not leak through the return pipe u: it will not cause any obstacles to the maintenance work. Therefore, it can be provided in addition to the 319986 amendment. 13 • 1356124 - Patent Application No. 97106416, August 22, 2005 In addition to the high reliability of the breathing phenomenon of the engine, there is also a fuel supply device that improves the maintainability - a good added value. Embodiment 2 > The closing of the opening 20b can be considered In the meantime, the ease of the work and the prevention of the drop of the pressure of the surplus fuel are considered, and the fitting by the snap fit is described as the first embodiment. Form 2 A fuel supply device in which the reliability of the remaining fuel is increased and the reliability is further improved will be described. Fig. 6 is a view corresponding to Fig. 4 in the second embodiment. As shown in Fig. 6, the present embodiment In the second aspect, the space of the lid portion 22c is provided with a relief valve 23. The pressure relief valve 23 is a so-called fuel release valve known as a valve, and the valve 23c resists the spring when the pressure of the remaining fuel exceeds a predetermined value. The spring pressure of 23b moves to the left side of the paper surface, thereby forming a discharge hole for releasing the fuel. In other words, if the pressure of the remaining fuel exceeds a predetermined value, the remaining fuel is discharged toward the arrow on the paper side at the pressure relief valve 23. 'The pressure in the remaining fuel path containing the return line 保持 can be kept constant. Therefore, in addition to the effects of the first embodiment, it is possible to provide a fuel supply device which contributes to further improving the reliability of the entire fuel supply system of the internal combustion engine. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing the appearance of a fuel supply device according to a first embodiment of the present invention. Fig. 2 is a view showing a state in which the fuel supply device of Fig. 1 is installed in a vehicle, for example, a fuel tank of a motorcycle. Sectional view. 14 319986 Amendment Benchuan 6124 Fig. 3 is a view of the appearance of the pump box in the first embodiment of the first embodiment of the present invention. Fig. 5 is a cross-sectional view of the nozzle cover of the embodiment i of the present invention. The second embodiment of the present invention is the same as the fourth figure. Description] The map of the field. 1 Fuel tank la Bottom lb Opening 2 Lining 3 Flange 4 Bolt 5 Fuel 5a Oil level 6 Pump box 6a, 13a Groove 6b Partition wall 6c Pump storage part 6d Fuel storage tank 6e Communication hole 6f Return flow path 6g Throat Part 6hl, 6h2 slit 6i area partition wall 7 suction filter 8 fuel pump 8a discharge part 9 high pressure filter 10 delivery pipe 10a, 11a connection part 11 return pipe 12 stay 13 filter case 14 nozzle part 15 screw 16 stopper 18 Jet pump 19, 24 Cylinder ring 20 Nozzle body 20a Injection hole 20b Opening portion 20c Cylinder portion 319986 Revision 15 • 1356124 Patent Application No. 97106416, August 22, pp. Amendment Replacement Page 21 Fuel Check Valve 22 Nozzle Cover 22a End face 22b Slot 22c Cover portion 22d Engagement recess 23 Pressure relief valve 23a Valve 23b Spring 101 Fuel supply device 16 319986 Revision