200400318 玖、發明說明： 【發明所屬之技術領域】 本發明係關於用電動泵將燃料槽内的燃料壓力升高，再 利用壓力控制閥將升壓的燃料調節至規定的壓力，將該燃 料向著燃料喷射閥而供給的車輛用之燃料供給裝置。特別 是關於電動泵在燃料槽内的配置。 【先前技術】 習知的燃料供給裝置如日本專利特開平8 — 1 9 3 5 5 2號公 報中所示，在燃料槽内配置著粗濾器，電動泵、壓力控制 閥，在電動泵的泵吸入通路上安裝著過濾器，朝電動泵的 泵部吸入的燃料槽内的燃料經由過濾器除去異物。 另外，將由粗濾器淨化的乾淨燃料供給至壓力控制閥的 燃料室内。用以調壓之剩餘燃料則通過回流燃料孔排出至 燃料槽内。 【發明内容】 (發明欲解決之問題） 在這種燃料供給裝置中使用的燃料槽内，燃料是從例如 給油孔供給至燃料槽内的。在給油時，微小的灰塵可能與 燃料一起侵入燃料槽内，隨著車輛的長期使用，大量的灰 塵積集在燃料槽的底部。 在車輛運轉時，為了調節燃料壓力，利用壓力控制閥使 剩餘的燃料通過回流燃料孔排出至燃料槽内，故當將剩餘 的燃料直接排出至燃料槽内時，由於燃料流動，激烈地攪 拌堆積在燃料槽底部的灰塵，使灰塵浮游並混入燃料中。 5 312/發明說明書(補件)/92-08/92114366 200400318 另一方面，在上述車輛運轉時，由於電動泵通過過濾 連續地將燃料槽内的燃料吸入至泵部中，使得在泵部中 壓的燃料向外部輸出，故在電動泵的泵作用期間，由於 濾器過濾混入很多灰塵的高灰塵濃度的燃料，因此，過 器有在短時間内就被堵塞之虞。 當灰塵將過濾器堵塞時，從電動泵輸出的輸出燃料減 少，過濾器的内部壓力升高，會造成過濾器的過濾部（ 如濾網）變形或破壞等。另外，雖藉由短時間内更換過 器或進行清掃可以消除過濾器的堵塞，但保養的頻率高 不實用。 又，在車輛停止時，當從給油孔向燃料槽内供給燃料 時，燃料的流入激烈地檟：拌堆積在燃料槽底部的灰塵， 灰塵浮游在燃料槽内的燃料中，特別是灰塵堆積在過濾 的過濾部上面，會產生與上述相同的問題。 本發明是考慮到上述問題而提出的，其目的是要提供 種可抑止由堆積在燃料槽底部的灰塵所造成的過濾器堵 塞，另外還可抑止電動泵的輸出性能降低、過濾器的變 和破壞，更可提高過濾器的保養性能的車輛用之燃料供 裝置。 (解決問題之手段） 為了達到上述目的，本發明的車輛用之燃料供給裝置 第一特徵為，利用電動泵將燃料槽内的燃料升壓，該升 的燃料由壓力控制閥調節至規定壓力，再供給至燃料喷 閥，在泵吸入通路中安裝著過濾器的電動泵固定地收納 312/發明說明書(補件)/92-08/92114366 器 升 過 濾 例 滤 而 使 器 形 給 的 壓 射 配 6 200400318 置在燃料槽内，而過濾器蓋配置在上述過濾器的 上，該過濾器蓋圍繞著過濾器的大致全周，並且 燃料槽内開口的開口部；另外，壓力控制閥的回 路的下游開口部向著過濾器蓋的内部而開口。 又，本發明的第二特徵為，除了上述第一特徵 述過濾器蓋係由橡膠材料製成，且在過濾器蓋的 突出設置有向著過濾器的過濾部的壁部。 又，本發明的第三特徵為，除了上述第一或第 外，在上述過濾器蓋的重力方向的内壁上，貫穿 料孔。 更且，本發明的第四特徵為，除了上述第一特 有上述過濾、器的電動泵固定在支持板構件上，而 件則整體地固定在封閉燃料槽開口的蓋構件上， 面，上述過濾器蓋由橡膠材料製成，並且在從内 端向上延伸的支持臂上整體地形成接合突起部， 合突起部與支持板構件的接合溝接合，將過濾器 支持板構件上。 另外，本發明的第五特徵為，除了上述第三特 在上述内壁上貫穿設置的燃料孔設在回流燃料通 開口部的投影面的外面。 根據本發明第一特徵，在電動泵的泵吸入通路 過濾器，在上述過濾器的外周邊上配置著過濾器 圍繞過濾器的大致全部周邊，同時具有朝燃料槽 的開口部。 3IV發明說明書(補件)/92-08/92114366 外周邊 具有向著 流燃料通 以外，上 内壁上， 二特徵 設置有燃 徵外，具 支持板構 另一方 壁的一側 使上述接 盍安裝在 徵外，將 路的下游 上安裝著 蓋，該蓋 内部開口 200400318 另外壓力控制閥的回流燃料通路的下游開口部，向著過 濾器蓋的内部開口。 因此，當引擎運轉時，從回流燃料通路向燃料槽排出的 回流燃料，不直接排出至燃料槽内，而是排出至過濾器蓋 的内部，因此，回流燃料不與堆積在燃料槽底部的灰塵攪 混，可將沒有混合灰塵的燃料槽内的燃料，通過過濾器蓋 的開口供給至過濾器。 另外，當引擎停止時，通過燃料槽的給油孔將燃料送至 燃料槽内時，在給油的短時間内，堆積在燃料槽底部的灰 塵可被給油燃料攪混，藉此使灰塵浮游在燃料槽内；但灰 塵因自身的質量而再次落下至下方，僅有微量堆積在過濾 器蓋的上面，故灰塵不會附著在過濾器的過濾部上面。因 此，由於不將浮游之含有堆積在燃料槽底部的灰塵的燃料 供給過濾器，故可抑止上述灰塵造成的過濾器堵塞，可防 止電動泵輸出的輸出燃料量減少，並可防止過濾器變形和 破損。 又，根據本發明第二特徵，由於過濾器蓋以橡膠材料製 成，同時，在過濾器蓋的内壁設有壁部，特別是用橡膠材 料製成過濾器蓋，因此容易製造内壁包圍過濾器四周的呈 袋孔形的過濾器蓋。另外，當過濾器蓋内的燃料向泵吸入 通路内吸入時，過濾器蓋内的壓力降低，過濾器的整個内 壁與過濾器的過濾部接觸變形，但在這種狀況下，只有壁 的前端部與過濾器的過濾部接觸，故過濾器的過濾面積不 會減小。 8 312/發明說明書(補件)/92-08/92114366 200400318 又，根據本發明第三特徵，由於在過濾器蓋的重力方向 的内壁上貫穿設置有燃料孔，故燃料槽内的燃料相對於電 動泵的最低使用燃料位置由燃料孔的位置決定。 更且，根據本發明的上述第四特徵，過濾器蓋用橡膠材 料製成，並且在從内壁的一側端向上延伸的支持臂上整體 形成接合突起部。另一方面，電動泵固定在支持板構件上， 支持板構件固定在封閉燃料槽開口部的蓋構件上，在該支 持板構件上貫穿設置接合溝，過濾器蓋的接合突起部與支 持板構件的接合溝接合。因此，非常容易並確實地將過濾 器蓋安裝在過濾器的外周邊上，而過濾器則安裝在固定於 支持板構件上的電動泵的泵吸入通路上。 甚又，根據本發明的第五特徵，由於將設在過濾器蓋内 壁上的燃料孔配置在回流燃料通路下游開口部的投影面外 面，因此，從回流燃料通路排出至過濾器内的回流燃料通 過燃料孔不直接排出至燃料槽内，不會攪拌燃料槽底部的 灰塵而使之在燃料槽内的燃料中浮游。 【實施方式】 以下利用圖1來說明本發明的車輛用燃料供給裝置的一 實施例。T為在内部貯存燃料的燃料槽，其上部的開口 T A 由蓋構件K關閉。蓋構件K利用例如螺栓、螺絲等，透過 襯墊，可自由裝拆地安裝在燃料槽T上。 燃料供給裝置是以下列方式構成的。 1為用焊接等方法固定在蓋構件K上、由向著燃料槽T 延伸的鐵板等剛性材料製成的支持板構件。在支持板構件 9 312/發明說明書(補件)/92-08/921143 66 200400318 1的下方，貫穿設置有接合溝1 A。接合溝1 A的形狀只要是 與後述的過濾器蓋的接合突起部能接合的形狀即可，不一 定限於本實施例的長溝。P為由泵部PA和馬達部Μ構成的 電動泵，本實施例中的泵部Ρ Α之構成係於泵室P A 1内可自 由轉動地配置著作成圓板狀的葉輪PA2，而葉輪PA2由馬 達部Μ帶動旋轉。在泵室PA1内從底部向下方突出的泵吸 入通路ΡΑ3和向著馬達部Μ周圍的室的輸出孔ΡΑ4呈開 口，從泵室P A1向著馬達部Μ周圍的室輸出的燃料，朝著 從上部向上突出的泵輸出通路ΡΑ5。 這種電動泵Ρ，利用圖中沒有示出的緊固構件等固定地 安裝在支持板構件1上。緊固支持方法可適當選擇。 R為將由電動泵Ρ的泵輸出通路ΡΑ5輸出的燃料壓力調 整至規定壓力的壓力控制閥，其以如下方式構成。 2為在圖中的右端開口且呈有底杯狀的控制閥殼體，3 為在圖中左端開口且呈有底杯狀的蓋，由隔膜構成的間隔 體4由在控制閥殼體2和蓋3的開口部上形成的環部夾持。 另外，由控制閥殼體2和間隔體4的左側面形成燃料室 5，而由蓋3和間隔體4的右側面形成彈簧室6。 又，在燃料室5中，設有調節器燃料流入通路7和回流 燃料通路8的開口 ，其中，回流燃料通路8透過閥座8 A， 向燃料室5開口，上述閥座的開口由與間隔體4同步移動 的閥體9控制。 另，1 0為壓縮設置在彈簧室6内，並將閥體9壓向閥座 8 A側的彈簧。上述壓力控制閥R由機器螺釘等鎖緊在蓋構 10 312/發明說明書(補件)/92-08/92114366 200400318 件K上。（壓力控制閥R也可以固定在支持板構件1上）。 F為過濾器，其構成如下所述。 1 1為一端向上方開口，同時另一端透過環部向右方開口 的連接管，支持臂Π A則從環部再向左方延伸。作成袋狀 的過濾部1 2配置在環部和支持臂1 1 A的外周邊上。上述過 濾部較佳由合成樹脂網製成，這時，連接管1 1也可用合成 樹脂材料製成。圖2中清楚地示出上述支持臂1 1 A和過濾 部1 2。 藉由使過濾器F的連接管1 1的上方開口與電動泵P的 泵吸入通路PA3連接，可將過濾器F安裝在電動泵P上。 電動泵P的泵輸出通路PA5與形成在蓋構件K上的第一管 路1 3配管連接。 又，由於如後所述，壓力控制閥R鎖緊在蓋構件K上， 這時，壓力控制闊R的調節器燃料流入通路7與在蓋構件 K上形成的第二管路1 4配管連接。 根據上述，過濾器F的連接管1 1與電動泵P的泵吸入 通路P A 3固定連接，而該電動泵P則安裝在固定於蓋構件 K上的支持板構件1上，電動泵P的泵輸出通路P A 5則與 蓋構件K的第一管路1 3配管連接。 又，壓力控制閥R鎖緊固定在蓋構件K上，調節器燃料 流入通路7與蓋構件K的第二管路1 4配管連接。 當燃料槽T的開口 TA被蓋構件K封閉時，可將含有過 濾器F的電動泵P和壓力控制閥R配置在燃料槽T内。 另外，由於第一管路1 3和安裝著燃料喷射閥J的燃料 11 312/發明說明書(補件)/92-08/92114366 200400318 分配管D透過第一燃料管1 4 A連接，同時，在該第 管1 4 A内配置著粗濾器E，因此，從電動泵P向著 配管D的第一燃料管1 4 A内的燃料中的異物被粗濾 去。 另外，由於第二燃料管1 5從粗濾器E下游的第· 管14A分支出來，第二燃料管15又與第二管路14 因此，在下游側的第一燃料管1 4 A中所流動的燃料 分透過第二燃料管1 5、第二管路1 4、調節器燃料流 7，流入壓力控制閥R的燃料室5内。 採用以上的構成，則在車輛運轉時，當電動泵P 部Μ驅動，泵部PA的葉輪PA2在泵室PA1内轉動# 過濾器F淨化的燃料槽Τ内的燃料，透過泵吸入通 被吸入至泵室P A1内，而由泵室P A1升壓的燃料， 出孔PA4、馬達部Μ外周邊的室、泵輸出通路PA5 管路1 3，供給至第一燃料管1 4 Α内，在第一燃料管 流動的燃料中的異物被粗濾器E除去，再供給至下 第一燃料管1 4 A。 另一方面，在該下游側的第一燃料管1 4 A内流動 的一部分，透過第二燃料管1 5、第二管路1 4和調 料流入通路7，流入壓力控制閥R的燃料室5内， 料室5，同時透過間隔體4克服彈簧1 0的彈力，伯 離開閥座8 A，在規定壓力下與彈簧1 0平衡，藉此 第一燃料管1 4 A内流動的燃料壓力調節至規定壓力 此，可透過第一燃料管1 4 A將具有規定燃料壓力的 312/發明說明書(補件)/92-08/92114366 一燃料 燃料分 器E除 -燃料 連接， 的一部 入通路 的馬達 f，已由 路PA3 透過輸 和第一 1 4 A内 游側的 的燃料 節器燃 充滿燃 L閥體9 可將在 。因 燃料供 12 200400318 給燃料分配管D。 如上所述，當為了調壓而使閥體9離開閥座8A且使閥 座8A開放時，在燃料室5内的燃料透過閥座8A、回流燃 料通路8，排出至燃料槽T内。 本發明的車輛用之燃料供給裝置的結構如下所述。 2 0為圍繞過濾器F的大致全部周邊，同時具有向著燃料 槽T内部開口的開口部2 0 A的過濾器蓋。更具體地說，過 濾器蓋2 0作成圍繞過濾器F的四周，即作成圍繞過濾器F 的過濾部1 2的底面、上面和兩個側面的袋孔形，開口部 2 0 A在上面開口而形成。（另外，所謂圍繞過濾器F的四周， 也包含圍繞連接管1 1 )。 另外，由於支持臂2 0 C從過濾器蓋2 0的一側端2 0 B (圖 中的左端）向上方延伸，故在其上端附近整體地形成由小 直徑部2 0 D和大直徑部2 0 E構成的接合突起部2 0 F。另外， 過濾器蓋2 0與含有連接管1 1的過濾器F的外周邊面對著 配置，同時在上面貫穿設置的開口部2 0 A與電動泵P的下 表面PB面對，配置在其下端附近；在這種狀態下，設在支 持臂2 0 C上的接合突起部2 0 F，與支持板構件1的接合溝 1 A接合，使過濾器蓋2 0安裝在支持板構件1上。 如上所述，含有連接管1 1的過濾器F的過濾部1 2配置 在過濾器蓋2 0的内部2 0 G中，過濾器蓋2 0的内部和燃料 槽T内透過開口部2 0 A連通。具體地說，透過在過濾器蓋 2 0上方的開口部2 0 A和電動泵P的下端外周邊之間形成的 間隙S而連通。 13 312/發明說明書(補件)/9108/92114366 200400318 另外，根據本發明，壓力控制閥R的回流燃料通路8的 下游開口 8 B，與過濾器蓋2 0的内部2 0 G連通。換句話說， 上述下游開口部8B不直接向燃料槽T内開口 。本實施例 中，下游開口部8 B在過濾器蓋2 0的一側端2 0 B上開口， 但開口位置不限於向著過濾器蓋2 0的内部2 0 G内。 其次，利用圖1和圖2來說明該裝置的作用。 首先，在車輛停止時，當從燃料槽T的給油孔（圖中沒 有示出）向燃料槽T内供給燃料時，由於燃料槽T内的燃 料受到很大的攪拌，因此堆積在燃料槽T的底部TB上的灰 塵與燃料混合，在燃料槽T内浮游。 這種浮游的灰塵，經過一段時間，因其本身具有質量而 再次向下落下，但因過濾器F的過濾部1 2的大致整個周邊 配置在過濾器蓋20的内部20G内，因此，落下的灰塵不會 堆積在過濾器F的過濾部1 2上（特別是在過濾部1 2的表 面）。另外，灰塵會從開口部2 0 A的間隙S侵入過濾器蓋 20的内部20G中，但間隙S受到電動泵P的下端附近的限 制，使灰塵不能大量地侵入過濾器蓋2 0内。 其次，對在車輛運轉時進行說明；從壓力控制閥R的回 流燃料通路8排出的回流燃料，透過回流燃料通路8的下 游開口 8 B而排出至過濾器蓋2 0的内部2 0 G中，該燃料再 透過過濾器F而被吸入至電動泵P的泵部PA中。 如上所述，由於從回流燃料通路8的下游開口 8 B排出 的回流燃料不攪拌堆積在燃料槽T底部TB上的灰塵，因此 該灰塵不與燃料槽T内的燃料混合、浮游。因此，由於通 14 312/發明說明書(補件)/92-08/92114366 200400318 過過濾器蓋2 0的開口 2 0 A的間隙S而從燃料槽T内流入過 濾器蓋2 0的内部2 0 G内的燃料中不含有灰塵，可以抑止灰 塵堵塞過濾器F的過濾部1 2。 由此，可以抑止因過濾器F的過濾部1 2被堵塞而造成 的電動泵Ρ的輸出量的減少。另外，還可以抑止由於過濾 器F的過濾部1 2内的壓力升高造成的過濾部1 2的變形和 破損。更可以延長灰塵附著和堆積在過濾部1 2上的時間， 因此可降低過濾器F的保養頻率。此外，由於過濾器蓋2 0 可以遮斷從回流燃料通路8的下游開口 8 Β排出的回流燃料 的排出聲，因此，噪音不會向外部洩露。 又，2 0 J為從過濾器蓋2 0的内壁2 Ο Η向著過濾器F的過 濾部1 2而突出設置的壁，在本實施例中，表示了從過濾器 蓋20的上面向過濾部12的上表面突出設置的上部壁 20J1，及從過濾器蓋20的下表面向過濾部12的下表面突 出設置的下部壁2 0 J 2。該過濾器蓋2 0由橡膠材料製成。 如上所述，當由於燃料從過濾器蓋2 0的内部2 0 G被吸入至 過濾器F内，而使過濾器蓋2 0内部2 0 G内的壓力降低時， 或即使燃料槽Τ内的液面變動大時，過濾器蓋2 0的内壁 2 Ο Η也不會全面地與過濾部1 2接觸。亦即，只有上部壁2 0 J 1 和下部壁2 0 J 2的前端2 0 J 3與過濾部1 2接觸，而過濾器蓋 2 0的内壁2 Ο Η則不全面地接觸。因此，在這種情況下，可 以確保過濾部1 2的充分的過濾面積，不會使電動泵Ρ的輸 出性能惡化。 又，由於過濾器蓋2 0由橡膠材料製成，因此，當前端 15 312/發明說明書(補件)/92-08/92114366 200400318 2 0 J 3與過濾部1 2接觸時，不會損壞過濾部1 2。更且，即 使過濾器蓋2 0與燃料槽T的底部TB接觸，也不會產生衝 撞打擊聲。 又，由於電動泵P固定在固定於蓋構件K上的支持板構 件1上，過濾器蓋2 0也安裝在支持板構件1上，電動泵P 和過濾器蓋安裝在共用的支持板構件1上，因此，可以正 確地將過濾器蓋2 0配置在安裝於電動泵P上的過濾器F 的外周邊上。 另外，當過濾器蓋2 0由橡膠材料製成，同時在過濾器 蓋2 0的支持臂2 0 C上設有接合突起部2 0 F，並在支持板構 件1上設置接合溝1A，則將過濾器蓋2 0配置在過濾器F 的外周邊上時，可以彈性地改變過濾器蓋2 0，將過濾器蓋 2 0配置在過濾器F的外周邊上，並且使過濾器蓋2 0的接 合突起部2 0 F與支持板構件1的接合溝1 A接合，藉此，可 以提高過濾器蓋2 0在過濾器F的外周邊上的安裝性，和過 濾器蓋2 0在支持板構件1上的安裝性，並大大改善裝配性 能，又，過濾器蓋2 0圍繞著過濾器F的整個周邊而作成袋 孔形，經由使用橡膠材料，可以容易地製造袋孔形的過濾 器蓋2 0。亦即，在本實施例中，即使在過濾器蓋的一側端 20B和支持臂20C上有凹槽部分（undercut)，利用橡膠材 料的變形，也可以製成袋孔形。 2 0 L為在過濾器蓋2 0的重力方向的内壁2 0 Η 1上設置的 燃料孔。 這裏，所謂重力方向的内壁2 0 Η1是指除了過濾器蓋2 0 16 312/發明說明書(補件)/92-08/92114366 200400318 的上表面、下表面以外的側面的内壁，它是與在燃料 内形成的燃料液面X — X大致垂直的内壁。由於在重力 的内壁2 0 Η 1上貫穿設置燃料孔2 0 L，在燃料孔2 0 L的 位於燃料槽Τ内的燃料液面X — X上之前時，貯存在燃 Τ内的燃料流入過濾器蓋2 0的内部2 0 G内，以電動泵 該燃料吸出。設置燃料孔2 0 L可以調整燃料槽Τ内的 無用殘留量（即電動泵吸不出去的燃料）。亦即，當燃 2 0 L的位置太高時，燃料無用殘留量太多，這是不好 但當燃料孔2 0 L的位置太低時，堆積在燃料槽Τ底部 上的灰塵會流入，也不好；考慮到這點，應如上所述 當選擇燃料孔2 0 L的高度位置。 另外，當設置上述燃料孔2 0 L時，也可將該燃料孔 回流燃料通路8的下游開口部8 Β的投影面的外面。所 在投影面的外面是指使燃料孔2 0 L偏離下游開口 8 Β的 線。藉此，可以防止從回流燃料通路8的下游開口 8 Β 大量地排出至過濾、器蓋2 0内的回流燃料，從燃料孔 流入至燃料槽Τ内，因此不會攪拌燃料槽Τ内的燃料 灰塵混入燃料中。 另外，如本實施例，當使用在葉輪P A 2的表面和背 有多個葉片槽的閉葉片形的再生泵部作為泵部PA時， 室PA1内產生的蒸氣，可與在泵室PA1内壓力升高的 的一部分一起通過蒸氣排出通路P A 6，從電動泵P的 P B排出至過濾器蓋2 0的内部。藉此，含有從蒸氣排 路P A 6排出的蒸氣的燃料不會攪拌堆積在燃料槽T的 312/發明說明書(補件)/92-08/92114366 槽T 方向 開口 料槽 P將 燃料 料孔 的， TB 地適 設在 謂設 延長 猛烈 20L 、使 面具 在泵 燃料 下面 出通 底部 17 200400318 TB上的灰塵，同樣可消除由灰塵造成的問題。 圖3表示本發明的車輛用之燃料供給裝置的另一個實施 例。本實施例只對與上述第1實施例中的粗濾器配置不同 的部分進行說明。（相同的結構部分用相同的元件符號表 示，說明從略）。 粗濾器Ε配置在連接電動泵Ρ的泵輸出通路P A 5和第一 管路1 3的燃料管路上，與電動泵P、壓力控制閥R —起放 置在燃料槽T内部。另外，粗濾器E的流入側通路EA與電 動泵P的泵輸出通路P A 5連接，粗濾器E的輸出側通路Ε B 透過第一管路1 3和第一燃料管1 4 A，與燃料分配管D連接。 又，由於第二燃料管15從第一管路13分支出來，第二 燃料管1 5透過第二管路1 4與壓力控制閥R的調節器燃料 流入通路7連接。藉由此實施例，除了具有與上述實施例 同樣的作用和效果以外，由於粗濾器E可配置在燃料槽T 内，因此，燃料槽T外面的空間可增大，對於車輛其他構 成零件的配置自由度可提高，配管作業容易。 (發明效果） 如上所述，根據申請專利範圍第1項之發明，在泵吸入 通路上安裝著過濾器的電動泵，固定地收裝配置在燃料槽 内，另外，在上述過濾器的外周邊上配置著過濾器蓋，該 蓋圍繞過濾器的大致全部周邊，同時具有在燃料槽内開口 的開口部，又由於壓力控制閥的回流燃料通路的下游開口 部向著過濾器蓋的内部開口 ，因此在向燃料槽内供給燃料 和從回流燃料通路排出回流燃料時，燃料不攪拌堆積在燃 18 312/發明說明書(補件)/92-08/92114366 200400318 料槽底部的灰塵，可以抑止灰塵造成的過濾器堵塞，可 防止電動泵輸出量的減少和過濾器的變形和破損，更可 高過濾器的保養性能。 又，根據申請專利範圍第2項之發明，由於過濾器蓋 橡膠材料製成，同時，在過濾器蓋的内壁上突出設置向 過濾器的過濾部突出的壁，因此即使過濾器蓋向内部產 變形時，過濾器蓋的内壁也不會全面地與過濾器的過濾 接觸，不會減少過濾器的過濾面積。 又，因為過濾器蓋用橡膠材料製成，即使壁的前端與 濾器的過濾部接觸，也不會損傷過濾部，更且，即使過 器蓋與燃料槽接觸，也不會產生衝擊聲和滑動聲。 又，根據申請專利範圍第3項之發明，由於在過濾器 的重力方向的内壁上貫穿設置燃料孔，因此可以經由選 與過濾器蓋的開口部不同的燃料孔的開口位置，而適當 選擇燃料槽内的燃料無用殘留量。 根據申請專利範圍第4項之發明，由於具有過濾器的 動栗固定在支持板構件上，而支持板構件整體地固定在 閉燃料槽開口的蓋構件上，另一方面，上述的過濾器蓋 橡膠材料製成，同時，在從内壁的一側向上延伸的支持 上整體地形成接合突起部，上述接合突起部與支持板構 上的接合溝接合，將過濾器蓋安裝在支持板構件上，又 於具有過濾器的電動泵和過濾器蓋安裝在共用的支持板 件上，因此可正確地將過濾器蓋配置在過濾器的過濾部 外周邊上。 312/發明說明書(補件)/92-08/92114366 以 提 用 著 生 部 過 滤 蓋 擇 地 電 封 由 臂 件 由 構 的 19 200400318 另外，經由使設在由橡膠材料製成的過濾器蓋的支持臂 上的接合突起部，與支持板構件上的接合溝接合，可將過 濾器蓋配置在過濾器的過濾部的外周邊上，這時可使過濾 器蓋彈性變形，因此可提高過濾器蓋的安裝性能。 另外，利用橡膠材料製造過濾器蓋，特別是為了圍繞過 濾器的過濾部而將過濾器蓋作成袋孔形時，含有凹槽部 分，為優點之一。 又另，根據申請專利範圍第5項之發明，由於在内壁上 貫穿設置的燃料孔設在回流燃料通路下游開口部的投影面 外面，因此，從回流燃料通路排出至過濾器蓋内的燃料不 會經由燃料孔排出至燃料槽外，不會攪拌燃料槽中的灰塵。 【圖式簡單說明】 圖1為表示本發明車輛用之燃料供給裝置的一實施例的 主要部分縱截面圖。 圖2為圖1中的Y — Y線的縱截面圖。 圖3為表示本發明的車輛用之燃料供給裝置的其他實施 例的主要部分縱截面圖。 (元件符號說明） 1 支持板構件 1A 接合溝 2 控制閥殼體 3 蓋 4 間隔體 5 燃料室 20 312/發明說明書(補件)/92-08/921M366 200400318 6 彈簧室 7 調節器燃料流入通路 8 回流燃料通路 8 A 閥座 8B 下游側開口 9 閥體 10 彈簧 11 連接管 1 1 A 支持臂 12 過濾部 13 第一管路 14 第二管路 1 4 A 第一燃料管 15 第二燃料管 2 0 過濾器蓋 20A 開口部 2 0 B 一端側 2 0 C 支持臂 2 0 D 小直徑部 2 0 E 大直徑部 2 0 F 接合突起部 20G 内部 20H 内壁 20H1 重力方向内壁 21200400318 (1) Description of the invention: [Technical field to which the invention belongs] The present invention relates to raising the fuel pressure in a fuel tank by using an electric pump, and then using a pressure control valve to adjust the boosted fuel to a predetermined pressure, and the fuel is directed toward A fuel supply device for a vehicle that is supplied by a fuel injection valve. In particular, the arrangement of the electric pump in the fuel tank. [Prior Art] A conventional fuel supply device is disclosed in Japanese Patent Laid-Open No. 8-1 9 3 5 5 2 with a coarse filter, an electric pump, a pressure control valve, and a pump in the electric pump disposed in the fuel tank. A filter is attached to the suction passage, and foreign matter is removed from the fuel in the fuel tank sucked into the pump portion of the electric pump through the filter. In addition, clean fuel purified by the primary filter is supplied into a fuel chamber of a pressure control valve. The remaining fuel for pressure regulation is discharged into the fuel tank through the return fuel hole. SUMMARY OF THE INVENTION (Problems to be Solved by the Invention) In a fuel tank used in such a fuel supply device, fuel is supplied into the fuel tank from, for example, a fuel supply hole. When fueling, tiny dust may invade the fuel tank together with the fuel. With the long-term use of the vehicle, a large amount of dust accumulates at the bottom of the fuel tank. When the vehicle is running, in order to adjust the fuel pressure, the remaining fuel is discharged into the fuel tank through the return fuel hole through a pressure control valve. Therefore, when the remaining fuel is directly discharged into the fuel tank, the fuel is stirred and accumulated fiercely due to the flow of fuel. Dust at the bottom of the fuel tank, which allows the dust to float and mix into the fuel. 5 312 / Invention Manual (Supplement) / 92-08 / 92114366 200400318 On the other hand, when the above-mentioned vehicle is running, the electric pump continuously sucks the fuel in the fuel tank into the pump section by filtering. The pressurized fuel is output to the outside. During the pumping action of the electric pump, the filter may filter the fuel with a high dust concentration in which a lot of dust is mixed. Therefore, the filter may be blocked in a short time. When the filter is clogged with dust, the output fuel output from the electric pump is reduced, and the internal pressure of the filter is increased, which may cause deformation or damage to the filter part (such as the filter). In addition, although the filter can be eliminated by replacing or cleaning the filter in a short period of time, the frequency of maintenance is not practical. In addition, when the vehicle is stopped, when the fuel is supplied into the fuel tank from the oil supply hole, the inflow of the fuel is violently stirred: the dust accumulated on the bottom of the fuel tank, the dust floats in the fuel in the fuel tank, especially the dust is deposited on The same problem as described above occurs in the upper part of the filter. The present invention has been made in consideration of the above-mentioned problems, and an object thereof is to provide a method for suppressing filter clogging caused by dust accumulated on the bottom of a fuel tank, and also for suppressing a decrease in output performance of an electric pump, a change in a filter, and the like. Destroyed fuel supply device for vehicles that can improve filter maintenance performance. (Means for Solving the Problem) In order to achieve the above object, a first feature of the fuel supply device for a vehicle of the present invention is to use an electric pump to boost the fuel in a fuel tank, and the liter of fuel is adjusted to a predetermined pressure by a pressure control valve. The fuel pump is supplied to the fuel injection valve, and the electric pump with a filter installed in the pump suction path fixedly accommodates 312 / Invention Manual (Supplement) / 92-08 / 92114366. 6 200400318 is placed in the fuel tank, and the filter cover is arranged on the above filter. The filter cover surrounds the entire circumference of the filter and has an opening in the fuel tank. In addition, the The downstream opening portion opens toward the inside of the filter cover. A second feature of the present invention is that, in addition to the first feature, the filter cover is made of a rubber material, and a wall portion facing the filter portion of the filter is provided on a protrusion of the filter cover. A third feature of the present invention is that, in addition to the first or second aspect, the inner wall of the filter cover in the direction of gravity penetrates a material hole. Furthermore, the fourth feature of the present invention is that, in addition to the above-mentioned first electric pump having the above-mentioned filter, the filter is fixed to the supporting plate member, and the piece is integrally fixed to the cover member that closes the opening of the fuel tank. The device cover is made of a rubber material, and an engagement protrusion is integrally formed on a support arm extending upward from the inner end, and the engagement protrusion is engaged with the engagement groove of the support plate member to attach the filter support plate member. A fifth feature of the present invention is that, in addition to the third feature, a fuel hole provided through the inner wall is provided outside the projection surface of the return fuel passage opening. According to a first feature of the present invention, the pump suction passage filter of the electric pump has a filter disposed on an outer periphery of the filter, and the filter surrounds substantially the entire periphery of the filter and has an opening toward the fuel tank. 3IV Invention Specification (Supplement) / 92-08 / 92114366 The outer perimeter is provided with a flow of fuel to the outside, on the upper inner wall, two features are provided with a flammable outer wall, and one side of the other wall with a support plate structure allows the above connection to be installed on In addition, a cover is installed on the downstream side of the road, and the inside of the cover is 200400318, and the downstream opening of the return fuel passage of the pressure control valve is opened toward the inside of the filter cover. Therefore, when the engine is running, the return fuel discharged from the return fuel path to the fuel tank is not directly discharged into the fuel tank, but is discharged into the filter cover. Therefore, the return fuel is not related to the dust accumulated on the bottom of the fuel tank. Stirring can supply the fuel in the fuel tank without mixed dust to the filter through the opening of the filter cover. In addition, when the engine is stopped, when the fuel is sent into the fuel tank through the fuel hole of the fuel tank, the dust accumulated on the bottom of the fuel tank can be mixed by the fueled fuel in a short time of fueling, thereby allowing the dust to float on the fuel tank. However, due to its own mass, the dust falls to the bottom again, and only a small amount of dust accumulates on the top of the filter cover, so the dust will not adhere to the top of the filter portion of the filter. Therefore, since the floating fuel containing dust accumulated on the bottom of the fuel tank is not supplied to the filter, the filter clogging caused by the dust can be suppressed, the amount of output fuel output from the electric pump can be prevented from being reduced, and the deformation of the filter and the filter can be prevented. damaged. In addition, according to the second feature of the present invention, since the filter cover is made of a rubber material, and the inner wall of the filter cover is provided with a wall portion, particularly the filter cover is made of a rubber material, it is easy to manufacture the inner wall to surround the filter. Peripheral filter cover in the shape of a pocket. In addition, when the fuel in the filter cover is sucked into the pump suction passage, the pressure in the filter cover is reduced, and the entire inner wall of the filter is deformed in contact with the filter portion of the filter. However, in this case, only the front end of the wall is deformed. Since the part is in contact with the filtering part of the filter, the filtering area of the filter does not decrease. 8 312 / Invention Specification (Supplement) / 92-08 / 92114366 200400318 According to the third feature of the present invention, since the fuel hole is provided through the inner wall of the filter cover in the direction of gravity, the fuel in the fuel tank is relatively The minimum fuel position of the electric pump is determined by the position of the fuel hole. Furthermore, according to the above-mentioned fourth feature of the present invention, the filter cover is made of a rubber material, and an engaging protrusion is integrally formed on the support arm extending upward from one end of the inner wall. On the other hand, the electric pump is fixed to a support plate member, the support plate member is fixed to a cover member that closes the opening of the fuel tank, an engagement groove is penetrated through the support plate member, and the engagement protrusion of the filter cover and the support plate member Of the joint groove. Therefore, it is very easy and secure to attach the filter cover to the outer periphery of the filter, and the filter to the pump suction path of the electric pump fixed to the supporting plate member. Furthermore, according to the fifth feature of the present invention, since the fuel hole provided on the inner wall of the filter cover is arranged outside the projection surface of the downstream opening of the return fuel passage, the return fuel discharged from the return fuel passage into the filter The fuel holes are not directly discharged into the fuel tank, and the dust at the bottom of the fuel tank is not stirred and floated in the fuel in the fuel tank. [Embodiment] An embodiment of a fuel supply device for a vehicle according to the present invention will be described below with reference to Fig. 1. T is a fuel tank for storing fuel inside, and an opening T A at an upper portion thereof is closed by a cover member K. The cover member K is detachably attached to the fuel tank T through a gasket using bolts, screws, or the like, for example. The fuel supply device is configured in the following manner. 1 is a support plate member made of a rigid material such as an iron plate extending toward the fuel tank T, which is fixed to the cover member K by welding or the like. Below the supporting plate member 9 312 / Invention Specification (Supplement) / 92-08 / 921143 66 200400318 1, a joint groove 1 A is provided therethrough. The shape of the engagement groove 1A is not limited to the long groove of this embodiment, as long as it can be engaged with the engagement protrusion of the filter cover described later. P is an electric pump composed of a pump portion PA and a motor portion M. The pump portion PA in this embodiment is configured such that an impeller PA2, which is formed in a disc shape, is rotatably arranged in the pump chamber PA1, and the impeller PA2 The motor section M drives the rotation. The pump suction passage PA3 protruding downward from the bottom in the pump chamber PA1 and the output hole PA4 toward the chamber surrounding the motor section M are opened, and the fuel output from the pump chamber P A1 toward the chamber surrounding the motor section M is directed from the upper part. Pump output path PA5 protruding upward. This electric pump P is fixedly mounted on the support plate member 1 by a fastening member or the like not shown in the figure. The fastening support method can be appropriately selected. R is a pressure control valve that adjusts the fuel pressure output from the pump output passage PA5 of the electric pump P to a predetermined pressure, and is configured as follows. 2 is a control valve housing which is opened at the right end in the figure and has a bottom cup shape, 3 is a cover which is opened at the left end in the figure and has a bottom cup shape, and a spacer composed of a diaphragm 4 is provided by the control valve housing 2 It is clamped with the ring part formed in the opening part of the cover 3. A fuel chamber 5 is formed on the left side of the control valve housing 2 and the spacer 4, and a spring chamber 6 is formed on the right side of the cover 3 and the spacer 4. The fuel chamber 5 is provided with openings for the regulator fuel inflow path 7 and the return fuel path 8. The return fuel path 8 penetrates the valve seat 8A and opens to the fuel chamber 5. The opening of the valve seat is separated from the gap. The valve body 9 of the body 4 moves synchronously. In addition, 10 is a spring provided in the spring chamber 6 in compression and pressing the valve body 9 toward the valve seat 8A side. The pressure control valve R is locked on the cover structure 10 312 / Invention Specification (Supplement) / 92-08 / 92114366 200400318 K by a machine screw or the like. (The pressure control valve R may be fixed to the support plate member 1). F is a filter, and its structure is as follows. 1 1 is a connecting pipe with one end opening upwards and the other end opening through the ring to the right, and the support arm Π A extends from the ring to the left. The bag-shaped filter section 12 is arranged on the ring section and the outer periphery of the support arm 1 1A. The above-mentioned filter portion is preferably made of a synthetic resin mesh. In this case, the connecting pipe 11 may also be made of a synthetic resin material. The above-mentioned support arm 1 A and the filter portion 12 are clearly shown in FIG. 2. The filter F can be attached to the electric pump P by connecting the upper opening of the connection pipe 11 of the filter F with the pump suction passage PA3 of the electric pump P. The pump output passage PA5 of the electric pump P is connected to the first pipe 13 formed in the cover member K by piping. As described later, the pressure control valve R is locked to the cover member K. At this time, the regulator fuel inflow path 7 of the pressure control valve R is connected to the second pipe 14 formed in the cover member K. According to the above, the connection pipe 11 of the filter F is fixedly connected to the pump suction passage PA 3 of the electric pump P, and the electric pump P is mounted on the support plate member 1 fixed to the cover member K. The pump of the electric pump P The output passage PA 5 is connected to the first pipe 13 of the cover member K. In addition, the pressure control valve R is locked and fixed to the cover member K, and the regulator fuel inflow path 7 is connected to the second line 14 of the cover member K. When the opening TA of the fuel tank T is closed by the cover member K, the electric pump P and the pressure control valve R including the filter F can be arranged in the fuel tank T. In addition, since the first pipe 13 and the fuel 11 312 / invention specification (supply) / 92-08 / 92114366 200400318 installed with the fuel injection valve J are connected through the first fuel pipe 1 4 A, at the same time, in The primary filter E is disposed in the first tube 14A. Therefore, foreign substances in the fuel in the first fuel tube 14A from the electric pump P toward the pipe D are roughly filtered. In addition, since the second fuel pipe 15 is branched off from the first pipe 14A downstream of the pre-filter E, the second fuel pipe 15 and the second pipe 14 are flown through the first fuel pipe 14 A on the downstream side. The divided fuel passes through the second fuel pipe 15, the second pipe 14, and the regulator fuel flow 7 and flows into the fuel chamber 5 of the pressure control valve R. With the above structure, when the electric pump P is driven by the motor P, the impeller PA2 of the pump PA rotates in the pump chamber PA1. The fuel in the fuel tank T purified by the filter F is sucked in through the pump and sucked in. Into the pump chamber P A1, and the fuel boosted by the pump chamber P A1 is supplied to the first fuel pipe 14 4 A through the hole PA4, the chamber outside the motor section M, and the pump output passage PA5 pipe 13; The foreign matter in the fuel flowing through the first fuel pipe is removed by the pre-filter E, and then supplied to the lower first fuel pipe 14 A. On the other hand, a part of the flow in the first fuel pipe 1 4 A on the downstream side passes through the second fuel pipe 15, the second pipe 14, and the flavor inflow passage 7 and flows into the fuel chamber 5 of the pressure control valve R. At the same time, the material chamber 5 passes through the spacer 4 to overcome the elastic force of the spring 10, and leaves the valve seat 8 A, and is balanced with the spring 10 under a predetermined pressure, thereby adjusting the pressure of the fuel flowing in the first fuel pipe 14 A To the prescribed pressure, a portion of the 312 / Invention Specification (Supplement) / 92-08 / 92114366 with a prescribed fuel pressure can be removed through the first fuel pipe 1 4 A into the fuel passage, and a part of the fuel connection can be entered. The motor f, which has been filled by the road PA3 through the first 14 A internal fuel side fuel bank, is filled with the L valve body 9 and can be used. For fuel supply 12 200400318 to fuel distribution pipe D. As described above, when the valve body 9 is separated from the valve seat 8A and the valve seat 8A is opened for pressure adjustment, the fuel in the fuel chamber 5 passes through the valve seat 8A and the return fuel passage 8 and is discharged into the fuel tank T. The structure of the fuel supply device for a vehicle of the present invention is as follows. 20 is a filter cover that surrounds substantially the entire periphery of the filter F and has an opening portion 20 A that opens toward the inside of the fuel tank T. More specifically, the filter cover 20 is formed to surround the periphery of the filter F, that is, to form a bag hole shape that surrounds the bottom surface, the upper surface, and both sides of the filter portion 12 of the filter F, and the opening portion 20 A is opened on the upper surface. And formed. (In addition, the surrounding of the filter F includes the surrounding connecting pipe 1 1). In addition, since the support arm 20 C extends upward from the one side end 20 B (the left end in the figure) of the filter cover 20, the small diameter portion 20 D and the large diameter portion are integrally formed near the upper end thereof. 2 0 E constitutes a bonding protrusion 2 F. In addition, the filter cover 20 and the outer periphery of the filter F including the connection pipe 11 are arranged to face each other, and the opening portion 20 A penetratingly provided on the upper face faces the lower surface PB of the electric pump P, and is arranged thereon. Near the lower end; in this state, the engagement protrusion 2 0 F provided on the support arm 20 C is engaged with the engagement groove 1 A of the support plate member 1 so that the filter cover 20 is mounted on the support plate member 1 . As described above, the filter section 12 including the filter F of the connection pipe 11 is arranged in the inside 20 G of the filter cover 20, and the inside of the filter cover 20 and the fuel tank T penetrate the opening section 2 0 A. Connected. Specifically, it communicates through a gap S formed between the opening portion 20 A above the filter cover 20 and the outer periphery of the lower end of the electric pump P. 13 312 / Description of the Invention (Supplement) / 9108/92114366 200400318 In addition, according to the present invention, the downstream opening 8 B of the return fuel passage 8 of the pressure control valve R communicates with the inside 20 G of the filter cover 20. In other words, the downstream opening portion 8B does not open directly into the fuel tank T. In this embodiment, the downstream opening portion 8 B opens at one end 20 B of the filter cover 20, but the opening position is not limited to the inside 20 G toward the filter cover 20. Next, the operation of the device will be described using FIG. 1 and FIG. 2. First, when the vehicle is stopped, when fuel is supplied into the fuel tank T from an oil supply hole (not shown) in the fuel tank T, the fuel in the fuel tank T is greatly stirred, so it accumulates in the fuel tank T. The dust on the bottom TB is mixed with fuel and floats in the fuel tank T. After a period of time, this floating dust drops down again due to its own mass. However, since substantially the entire periphery of the filter portion 12 of the filter F is disposed in the inside 20G of the filter cover 20, Dust does not accumulate on the filter portion 12 of the filter F (especially on the surface of the filter portion 12). In addition, dust enters the inside 20G of the filter cover 20 through the gap S of the opening 20 A, but the gap S is restricted by the vicinity of the lower end of the electric pump P, so that dust cannot enter the filter cover 20 in a large amount. Next, the operation of the vehicle will be described; the return fuel discharged from the return fuel passage 8 of the pressure control valve R is discharged through the downstream opening 8 B of the return fuel passage 8 into the interior 2 G of the filter cover 20, This fuel passes through the filter F and is sucked into the pump portion PA of the electric pump P. As described above, since the return fuel discharged from the downstream opening 8B of the return fuel passage 8 does not agitate the dust accumulated on the bottom TB of the fuel tank T, the dust does not mix with the fuel in the fuel tank T and float. Therefore, due to 14 312 / Invention Specification (Supplement) / 92-08 / 92114366 200400318, the gap S through the opening 2 0 A of the filter cover 2 flows into the inside of the filter cover 2 0 from the fuel tank T. The fuel in G does not contain dust, and it is possible to prevent dust from blocking the filter portion 12 of the filter F. As a result, it is possible to suppress a decrease in the output of the electric pump P due to the clogging of the filter portion 12 of the filter F. In addition, it is possible to suppress deformation and breakage of the filter portion 12 due to an increase in pressure in the filter portion 12 of the filter F. Further, the time for dust to adhere to and accumulate on the filter section 12 can be prolonged, so that the maintenance frequency of the filter F can be reduced. In addition, since the filter cover 20 can block the exhaust sound of the return fuel discharged from the downstream opening 8B of the return fuel passage 8, the noise does not leak to the outside. 2 J is a wall protruding from the inner wall 2 壁 of the filter cover 20 toward the filter portion 12 of the filter F. In this embodiment, the filter portion 20 is shown from the upper surface of the filter cover 20 to the filter portion. An upper wall 20J1 protruding from the upper surface of 12 and a lower wall 2 0 J2 protruding from the lower surface of the filter cover 20 facing the lower surface of the filter portion 12. The filter cover 20 is made of a rubber material. As described above, when fuel is sucked from the inside 20 G of the filter cover 20 into the filter F, the pressure in the inside 20 G of the filter cover 20 decreases, or even if the pressure in the fuel tank T When the liquid level fluctuates greatly, the inner wall 2 Η of the filter cover 20 does not come into full contact with the filter portion 12. That is, only the front end 20 J 3 of the upper wall 20 J 1 and the lower wall 20 J 2 are in contact with the filter portion 12, and the inner wall 2 0 Η of the filter cover 20 is not in full contact. Therefore, in this case, it is possible to ensure a sufficient filtering area of the filtering section 12 without deteriorating the output performance of the electric pump P. In addition, since the filter cover 20 is made of a rubber material, the front end 15 312 / Invention Specification (Supplement) / 92-08 / 92114366 200400318 2 0 J 3 does not damage the filter when it contacts the filter part 12. Department 1 2. Moreover, even if the filter cover 20 comes into contact with the bottom TB of the fuel tank T, no impact sound is generated. Since the electric pump P is fixed to the support plate member 1 fixed to the cover member K, the filter cover 20 is also attached to the support plate member 1, and the electric pump P and the filter cover are attached to the common support plate member 1. Therefore, the filter cover 20 can be accurately arranged on the outer periphery of the filter F mounted on the electric pump P. In addition, when the filter cover 20 is made of a rubber material, and at the same time, a support protrusion 2 0 F is provided on the support arm 20 C of the filter cover 20, and an engagement groove 1A is provided on the support plate member 1, When the filter cover 20 is disposed on the outer periphery of the filter F, the filter cover 20 can be flexibly changed, the filter cover 20 can be disposed on the outer periphery of the filter F, and the filter cover 20 can be changed. The engagement protrusions 20F are engaged with the engagement grooves 1A of the support plate member 1, whereby the attachment of the filter cover 20 to the outer periphery of the filter F and the filter cover 20 to the support plate can be improved. The mountability on the component 1 greatly improves the assembly performance. The filter cover 20 is formed into a bag-hole shape around the entire periphery of the filter F. By using a rubber material, a bag-hole-shaped filter cover can be easily manufactured. 2 0. That is, in this embodiment, even if there is an undercut on the side end 20B of the filter cover and the support arm 20C, the shape of the bag hole can be formed by the deformation of the rubber material. 2 0 L is a fuel hole provided on the inner wall 20 Η 1 of the filter cover 20 in the direction of gravity. Here, the inner wall 2 0 Η1 in the direction of gravity refers to an inner wall on a side surface other than the upper surface and the lower surface of the filter cover 2 0 16 312 / Invention Specification (Supplement) / 92-08 / 92114366 200400318. The fuel liquid level X-X formed inside the fuel is substantially perpendicular to the inner wall. Because the fuel hole 20 L is provided through the inner wall 20 Η 1 of gravity, the fuel stored in the fuel tank flows into the filter before the fuel hole 20 L is located on the fuel liquid level X — X in the fuel tank T. This fuel is sucked out by the electric pump inside 20 G of the cap 20. Setting the fuel hole 20 L can adjust the amount of unwanted residue in the fuel tank T (that is, the fuel that cannot be sucked out by the electric pump). That is, when the position of burning 20 L is too high, the amount of useless residual fuel is too much, which is not good, but when the position of the fuel hole 20 L is too low, the dust accumulated on the bottom of the fuel tank T will flow in, It is also not good; considering this, the height position of the fuel hole 20 L should be selected as described above. When the fuel hole 20 L is provided, the fuel hole may be returned to the outside of the projection surface of the downstream opening 8B of the fuel passage 8. The outside of the projection surface is a line that deviates the fuel hole 20 L from the downstream opening 8B. This prevents a large amount of the return fuel discharged from the downstream opening 8B of the return fuel passage 8 into the filter and the cap 20 from flowing into the fuel tank T from the fuel hole, so the fuel in the fuel tank T is not stirred. Dust gets into the fuel. In addition, as in this embodiment, when a closed vane-shaped regeneration pump unit having a plurality of blade grooves on the surface of the impeller PA 2 and the back is used as the pump unit PA, the vapor generated in the chamber PA1 can be compared with that in the pump chamber PA1. Part of the increased pressure passes through the vapor discharge passage PA 6 and is discharged from the PB of the electric pump P into the filter cover 20. Thereby, the fuel containing the vapor discharged from the vapor discharge path PA 6 will not be agitated and accumulated in the fuel tank T 312 / Invention Specification (Supplement) / 92-08 / 92114366 The open tank T in the direction of the tank T will open the fuel hole. The TB ground is suitable for dust that is set to extend fiercely 20L, so that the mask can pass through the bottom 17 200400318 TB under the pump fuel, which can also eliminate the problems caused by dust. Fig. 3 shows another embodiment of the fuel supply device for a vehicle according to the present invention. In this embodiment, only the parts different from the pre-filter configuration in the first embodiment will be described. (The same structural parts are indicated by the same component symbols, and the description is omitted). The pre-filter E is arranged on the fuel line connecting the pump output passage P A 5 of the electric pump P and the first pipe 13, and is placed inside the fuel tank T together with the electric pump P and the pressure control valve R. In addition, the inflow-side passage EA of the pre-filter E is connected to the pump output passage PA 5 of the electric pump P, and the output-side passage E B of the pre-filter E passes through the first pipe 13 and the first fuel pipe 14 A, and is separated from the fuel. Piping D is connected. Since the second fuel pipe 15 is branched from the first pipe 13, the second fuel pipe 15 is connected to the regulator fuel inflow passage 7 of the pressure control valve R through the second pipe 14. With this embodiment, in addition to having the same function and effect as the above-mentioned embodiment, since the pre-filter E can be arranged in the fuel tank T, the space outside the fuel tank T can be increased, and the arrangement of other constituent parts of the vehicle can be increased. The degree of freedom can be increased, and piping work is easy. (Effects of the Invention) As described above, according to the invention of claim 1 in the scope of patent application, the electric pump in which a filter is installed in the pump suction passage is fixedly housed in a fuel tank, and the filter is provided on the outer periphery of the filter. A filter cover is disposed on the filter cover. The cover covers substantially the entire periphery of the filter and has an opening opening in the fuel tank. The downstream opening of the return fuel passage of the pressure control valve opens toward the inside of the filter cover. When supplying fuel to the fuel tank and discharging the recirculated fuel from the recirculation fuel path, the fuel does not agitate and accumulate the dust accumulated on the bottom of the fuel tank. The clogging of the filter can prevent the reduction of the output of the electric pump and the deformation and damage of the filter, and can improve the maintenance performance of the filter. In addition, according to the invention of claim 2 in the scope of the patent application, the filter cover is made of rubber material, and at the same time, the inner wall of the filter cover is provided with a wall protruding toward the filter portion of the filter. When deformed, the inner wall of the filter cover will not be in full contact with the filtering of the filter, and the filtering area of the filter will not be reduced. In addition, because the filter cover is made of rubber material, even if the front end of the wall is in contact with the filter portion of the filter, the filter portion is not damaged, and even if the filter cover is in contact with the fuel tank, there is no impact noise and sliding. sound. In addition, according to the invention in claim 3, since fuel holes are provided through the inner wall of the filter in the direction of gravity, the fuel can be appropriately selected through the opening position of the fuel hole that is different from the opening portion of the filter cover. Unwanted fuel remaining in the tank. According to the invention of claim 4 in the scope of patent application, since the movable pump having the filter is fixed to the support plate member, the support plate member is integrally fixed to the cover member that closes the opening of the fuel tank. On the other hand, the filter cover described above It is made of rubber material, and at the same time, an engaging protrusion is integrally formed on the support extending upward from one side of the inner wall, the engaging protrusion is engaged with an engaging groove on the support plate structure, and the filter cover is mounted on the support plate member, Since the electric pump and the filter cover having the filter are mounted on a common support plate, the filter cover can be accurately arranged on the outer periphery of the filter portion of the filter. 312 / Instruction of the Invention (Supplement) / 92-08 / 92114366 In order to refer to the filter cover of the living part, the electric seal is selectively made by the arm piece 19 200400318 In addition, the filter cover made of rubber material is used The engagement protrusion on the support arm is engaged with the engagement groove on the support plate member, and the filter cover can be arranged on the outer periphery of the filter portion of the filter. At this time, the filter cover can be elastically deformed, and the filter cover can be improved. Installation performance. In addition, when the filter cover is made of a rubber material, especially when the filter cover is formed into a bag-hole shape so as to surround the filter portion of the filter, the inclusion of a recessed portion is one of the advantages. In addition, according to the invention in claim 5 of the scope of patent application, since the fuel hole penetratingly provided on the inner wall is provided outside the projection surface of the downstream opening of the return fuel passage, the fuel discharged from the return fuel passage into the filter cover is not. It is discharged to the outside of the fuel tank through the fuel hole, and does not stir the dust in the fuel tank. [Brief Description of the Drawings] Fig. 1 is a longitudinal sectional view of a main part showing an embodiment of a fuel supply device for a vehicle according to the present invention. FIG. 2 is a longitudinal sectional view taken along a line Y-Y in FIG. 1. Fig. 3 is a longitudinal sectional view of a main part showing another embodiment of the fuel supply device for a vehicle according to the present invention. (Description of component symbols) 1 Support plate member 1A Joint groove 2 Control valve housing 3 Cover 4 Spacer 5 Fuel chamber 20 312 / Invention manual (Supplement) / 92-08 / 921M366 200400318 6 Spring chamber 7 Regulator fuel inflow path 8 Return fuel passage 8 A Valve seat 8B Downstream opening 9 Valve body 10 Spring 11 Connection pipe 1 1 A Support arm 12 Filter section 13 First pipe 14 Second pipe 1 4 A First fuel pipe 15 Second fuel pipe 2 0 Filter cover 20A Opening part 2 0 B One end side 2 0 C Support arm 2 0 D Small diameter part 2 0 E Large diameter part 2 0 F Engagement protrusion 20G Inner 20H Inner wall 20H1 Gravity direction inner wall 21
312/發明說明書(補件)/92-08/92114366 200400318 20 J 壁 2 0 J 1 上部壁 2 0 J 2 下部壁 2 0 J 3 下部壁前端 2 0 L 燃料孔 D 燃料分配管 E 粗滤恭 F 過濾器 K 蓋構件 Μ 馬達部 Ρ 電動泵 Ρ Α 泵部 PA1 泵室 PA2 葉輪 Ρ A3 泵吸入通路 Ρ A 4 輸出孔 PA5 泵輸出通路 PA6 蒸氣排出通路 PB 下表面 R 壓力控制閥 S 間隙 T 燃料槽 TA 燃料槽上部開口 TB 燃料槽底部 22312 / Invention (Supplement) / 92-08 / 92114366 200400318 20 J Wall 2 0 J 1 Upper wall 2 0 J 2 Lower wall 2 0 J 3 Front end of lower wall 2 0 L Fuel hole D Fuel distribution pipe E Rough filtration F Filter K Cover member M Motor section P Electric pump P A Pump section PA1 Pump chamber PA2 Impeller P A3 Pump suction passage P A 4 Output hole PA5 Pump output passage PA6 Vapor discharge passage PB Lower surface R Pressure control valve S Clearance T Fuel Tank TA Fuel tank top opening TB Fuel tank bottom 22
312/發明說明書(補件)/92-08/92114366 200400318 x 液面線起點 γ 縱截面線起點 312/發明說明書(補件)/92_〇8/921 Μ366312 / Invention Specification (Supplement) / 92-08 / 92114366 200400318 x Start of Liquid Level Line γ Start of Vertical Section Line 312 / Invention Specification (Supplement) / 92_〇8 / 921 Μ366