200938424 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種在藉由走行風冷卻引擎之跨坐型車輛 中，特別是減低引擎外面之冷卻效果不均勻之技術。 【先前技術】 ' 以往有將引擎配置於由前方承受車輛之走行所產生之走 風之位置，藉由走行風冷卻該引擎之機車。在專利文獻 1所揭示之車輛中，藉由配置於引擎前方之蓋（在專利文獻 ❹ 1中為護腿板）將走行風引導至引擎。 [專利文獻1]日本特開2002-145 155號公報 【發明内容】 [發明所欲解決之問題] 然而’在機車中，由於引擎之外形而有走行風難以接觸 之部分，故有在引擎外面發生冷卻效果不均勻之情形。例 如，有將火星塞安裝於汽缸蓋之側面，將其安裝位置設置 藝於向内側凹入之位置之引擎。此情形，由引擎前方流過來 之走行風不能圓滑地流到火星塞之安裝位置，而有該安裝 位置難以被走行風充分冷卻之情形。 此點如專利文獻1所揭示之車輛，也可考慮藉由配置於 引擎前之車體蓋等將走行風引導至引擎外面之方法。然 而’因引擎之配置位置或走行風難以接觸之部分之位置， 有時欲將該車體蓋成型為藉由車體蓋將走行風引導至引擎 外面並不容易。 本發明係鑑於上述問題所完成者，其目的在於提供一種 136090.doc 200938424 擎外面之冷卻效果不均勻之跨坐 利用簡單之構造可減低引 型車輛。 [解決問題之技術手段] 為解決上述問題，本發明之跨坐型車輛包含引擎，其係 1 己置於由前方承受車輛之走行所產生之走行風之位置；、及 導壁，其細由前述引擎之外面突出，並與前述走行風相 向之方式安裝於前述引擎，將前述走行風引導至前述 之外面。200938424 IX. Description of the Invention: [Technical Field] The present invention relates to a technique for reducing the uneven cooling effect outside the engine in a straddle type vehicle that is cooled by an air-cooled engine. [Prior Art] 'In the past, the engine was placed at a position where the vehicle was driven by the front, and the locomotive of the engine was cooled by the wind. In the vehicle disclosed in Patent Document 1, the traveling wind is guided to the engine by a cover disposed in front of the engine (a leg shield in Patent Document ❹ 1). [Patent Document 1] Japanese Laid-Open Patent Publication No. 2002-145 No. 155 [Invention] [The problem to be solved by the invention] However, in the locomotive, there is a part in the locomotive that is difficult to contact due to the shape of the engine, so it is outside the engine. A situation in which the cooling effect is uneven. For example, there is an engine in which the spark plug is attached to the side of the cylinder head and its mounting position is set to a position recessed toward the inside. In this case, the running wind flowing from the front of the engine cannot smoothly flow to the installation position of the spark plug, and the installation position is difficult to be sufficiently cooled by the running wind. In this regard, as the vehicle disclosed in Patent Document 1, a method of guiding the traveling wind to the outside of the engine by a vehicle body cover or the like disposed in front of the engine may be considered. However, it is not easy to form the body cover by guiding the wind to the outside of the engine by the body cover due to the position of the engine or the position of the part where the wind is difficult to contact. The present invention has been made in view of the above problems, and an object thereof is to provide a straddle with an uneven cooling effect outside the 136090.doc 200938424. The simple structure can be used to reduce the lead vehicle. [Technical means for solving the problem] In order to solve the above problem, the straddle type vehicle of the present invention includes an engine which is placed at a position where the traveling wind generated by the vehicle is carried forward by the front; and a guide wall whose fine is The outer surface of the engine protrudes and is attached to the engine in such a manner as to face the traveling wind, and guides the traveling wind to the outer surface.
❹ 依據本發明’即使在引擎外面產生走行風難以接觸之部 分之情形，也可藉由導壁將走行風引導至該❹，故可減 低引擎外面之冷卻效果不均勻。又，因導壁係安裝於引擎 之構件，故與將車體蓋成型為該車體蓋將走行風引導至引 擎外面之情形相比，可利用簡單之構造將走行風引導至引 擎外面。又’上述跨坐型車輛係搭乘者跨坐在座墊上之車 輛，例如機車（含速克達）、或雪車、四輪貨車等。 【實施方式】 以下，一面參照圖式一面說明有關本發明之一實施型 態。圖1係本發明之實施型態例之機車1之侧面圖，圖2係 機車1前部之放大側面圖。 如圖1所示’機車1具有前輪3、後輪4、車體架20、前擒 泥板30、整流板39、遮板40、導壁50、及引擎60。又，車 體架20包含有頭管21、主管22、及向下管23。 頭管21係位於車體架20之前端，可旋轉地支持配置於其 内側之操向軸（未圖示）。主管22之前端與向下管23之上端 136090.doc • 6 · 200938424 (前端）連接於頭管21。主管22係由頭管21向後方延伸，下 管23係由頭管21向斜下方延伸。在主管22之上侧配置有貯 存燃料之燃料箱5,在該燃料箱5之後方，配置可供搭乘者 跨坐之座墊6。 在上述操向軸之上端及下端，安裝有上托架8與下托架 ' 7。上托架8與下托架7係藉由其左右之端部保持著左右一 對之前懸架9之上部。前懸架9係設成向斜下方延伸，藉由 其下端部％支持前輪3之車轴。又，前懸架9係正立式之懸 ^ 架，其下部具有外管9a，在該外管9a由上方插通内管9b。 在外管9a之上端’形成直徑大於該外管％之其他部分之大 徑部9c。 前擋泥板30係配置於一對前懸架9之間，由上方覆蓋著 前輪3。圖3係在圖2之m所示之方向看前擋泥板3〇之情形 之該前播泥板30之立體圖。 如圖2或圖3所示，前擋泥板3〇具有上面部3〇a、後側面 ⑩ 部3〇b及前側面部30c。上面部30a係形成以前輪3之車軸為 中〜彎曲，且位於前輪3之斜上方。後側面部3〇b係設成由 上面部30a之左右緣向下方延伸，位於前輪3之側方且前懸 架9之内側(車寬方向之中心側)(參照圖3)。前側面部3〇。係 設成由上面部30a之左右緣向下方延伸，位於前輪3之側方 且别懸架9之前（參照圖3)。如圖3所示，前側面部3〇c係朝 向外S 9a之外周面之車寬方向外側之位置向斜後方延伸。 即’前側面部3〇C係形成隨著接近於前懸架9,逐漸向側方 擴大藉此在車輕之走行時，可形成沿著前侧面部30c 136090.doc 200938424 向後方’至外管9a之側方之走行風之圓滑之氣流A1。 如圖2所示，整流板39係在上下方向較長之板狀之構 件，設於外管9a之後方》又，整流板39如圖3所示，係配 置成由外管9a之外周面向車寬方向之中心侧傾斜，其後端 緣39b比前端緣39a更靠近中心側。藉此，可形成由外管％ 之側方沿著整流板39向斜後方之圓滑之走行風之氣流A2。 又，如圖3所示，整流板39在其内側具有板狀之安裝部 39c^此安裝部39(；例如係被螺栓固定於設於外管％之大徑 ❹ °卩9c之凸台9d。又，如圖2所示，在整流板39之後方，配 置制動軟管13。此制動軟管13係連接於夾著與前輪3同時 旋轉之制動碟11之卡鉗12。 引擎60係被走行風冷卻之空冷式引擎，配置於由前方 (Fr所不之方向）承受車輛之走行時通過前擋泥板之上方 及左右兩侧而流向車體後方之走行風之位置。詳言之，如 圖2所不，引擎6〇係在前擋泥板3〇之後方配置成露出於 ❹外部。又，引擎60係位於主管22之下方且向下管23之後方 (參照圖1)’被主管22所懸架’並被設於向下管23之前端之 托架23a所支持。 如圖2所不’引擎60係包含收容曲轴（未圖示）之曲軸箱 61内°卩形成》飞缸（未圖示）之汽缸體62、内部形成使燃料 燃燒用之燃燒室之汽缸蓋63、及蓋著該汽缸蓋63之蓋Μ。 *軸I目61位於引擎6〇之下部，汽缸體以係以使汽缸之軸線 朝向斜上方之方式設於曲軸箱61之上部。汽缸蓋63係安裝 於π缸體62之上部。又’在汽缸蓋63之侧面㈣，安裝有 136090.doc 200938424 對含有送至燃燒室之空氣與燃料之混合氣點火之火星塞 65。火星塞65係由汽缸蓋63之外面***人，其前端部達到 燃燒室。又，在汽缸蓋63與汽缸體62之外面，形成冷卻片 60a 〇 圖4係圖2所示之IV-IV線之剖面圖。如圖4所示，在汽缸 蓋63之側面6孙設有向内側凹入之凹部63a。構成此凹部 - 63a之側壁63f係位於比側面63b之其他部分更裡側（内側）。 在凹部63a之底壁63h，形成***火星塞65之塞孔63卜 ❿ 又，如圖2所示，在火星塞65，蓋著連結該火星塞65與點 火線圈（未圖示）之塞蓋65ae又，在凹部63a之側方，配置 有將走行風引導至凹部63a之導壁5〇。有關此導壁5〇，容 後再詳加說明。 如圖2所示，在引擎60之前且前擋泥板3〇之後方，配置 有遮板40〇遮板40可將通過前擋泥板3〇之上方及側方之走 行風引導至引擎60。圖5係遮板40之正面圊，圖6係遮板4〇 ❹ 及導壁50之側面圖。如圖5所示，遮板40具有位於汽缸蓋 63及汽缸體62之前之前側導板42、位於該前側導板42之左 右兩側之外框41、41、與位於前侧導板42之左右兩側且外 框41、41之内侧（車寬方向之中心侧）之内框43、43。又， -在圖ό中’將外框4 1及内框43局部切剖，以顯示配置於其 内側之前側導板42。 外框41、41係在向下管23之左右，被該向下管23所支 持。詳言之，在向下管23之上端與主管22之間設有加強板 28(參照圖1)。在此加強板28安裝有向側方延伸之擇條49、 136090.doc 200938424 49。如圖5所示，在撐條49、49之前端，設有圓柱狀之減 震器49a、49a。外框41係在前側導板42之上方，具有向向 下管23側延伸之上面部41a，在此上面部41a之前端形成抓 住該減震器49a之安裝部41b。 又’在設於向下管23之下端之托架23a，安裝有向側方 延伸之撐條48、48 ^在外框41之下緣形成有向向下管23侧 突出之安裝部41c ’在此安裝部41c固定撐條48之前端。 則側導板42係在向下管23與外框41之間具有略水平地配 置之複數橫板42L、42R»複數（在此為3個）橫板42L·係在向 下管23之左側配置成上下排列，複數（在此為3個）橫板42R 係在向下管23之右側配置成上下排列。複數橫板42L、42R 係將沿著向斜下方彎曲之上面部3〇a流向斜下方之走行風 引導至引擎60侧。在各橫板42L之間、與各橫板42R之間， 設有支持此等之支柱部42a。 前側導板42係在其中央具有沿著向下管23之外周面向上 下延伸’且配合該外周面形狀彎曲之支持部42e，在該支 持部42e形成向側方突出之安裝部42f。在向下管23形成向 側方突出之托架23b、23b，安裝部42f係被螺栓47固定於 托架23b。 内框43、43係位於前側導板42之左右兩側，在外框41、 41之内側（車寬方向之中心側）配置成向上下方向延伸。在 左側之内框43 ’形成由該内框43之下端緣向内側突出之板 狀之導板43a。此導板43a之前端位於離開向下管23之位 置。又，内框43、43係與前侧導板42—體地被形成。 136090.doc 200938424 又，在向下管23之侧方，配置有依照搭乘者之操作發出 警報聲之警報器71。此警報器71位於設在向下管23之右側 之複數橫板42R中位於最上方之橫板42R、與右侧之外框 41之上面部41a之間之空間之後，露出於車輛前方。 詳細說明有關導壁50〇圖7係由内側（引擎6〇側）挑望導 壁50之側面圖，圖8係導壁50之正面圖。 導壁50係將由引擎60之前方流過來之走行風引導至引擎 60之侧面之金屬製之構件，由引擎60之側面向侧方突出， 以與走行風相向之方式安裝於該引擎60。詳言之，導壁5〇 係在形成於汽缸蓋63之凹部63a之側方向側方突出，並設 成將走行風引導至該凹部63a(參照圖4)。如圖4所示，導壁 50係向側方延伸’並彎曲，向前方延伸。而，其前端緣 50a位於比汽缸蓋63之前面63i更前面（參照圖6)。 導壁50係配置成將走行風引導至凹部63a，並形成將該 走行風由凹部63a向後方排出用之空氣流通路。詳言之， 如圖4所示，導壁5〇之後端緣50e係位於凹部63a之前後方 向之中央部之侧方，構成凹部63a之後側之壁63d位於比後 端緣50e更後方。藉此，不僅可形成由導壁5〇側向凹部63a 之則侧之空氣流通路B2，也形成由凹部63a之後側向車體 後方之空氣流通路B3。 導壁50係沿著汽缸蓋63之侧面63b向前方延伸，構成被 側面63b與導壁5〇所包圍之空氣流通路Bi。詳言之，導壁 5〇具有側面部50b ’該側面部50b係設成由側面63b向側方 大出後’沿著侧面63b向前方延伸。側面部5〇b之上緣及下 136090.doc 200938424 緣係向侧面63b側彎曲，導壁5〇具有由該側面部5〇b之上緣 及下緣向側面63b側延伸之上面部50(;與下面部50d(參照圖 8) °此等上面部5(^與下面部5〇d之端緣係沿著側面63b向 前方延伸’上面部50(;與下面部5〇d構成空氣流通路扪之上 面及下面。又，如圖4所示’下面部50d係形成使其前端緣 50h向車寬方向之外側斜斜地延伸。排氣管66係通過前端 緣50h之前而設在遮板4〇之導板43a之内側向下方延伸。 如圖7所示’導壁50係形成隨著向前方移動，與引擎6〇 之側面63b共同構成之空氣流通路B1之剖面逐漸變大。詳 言之’上面部50c係對下面部50d向上方傾斜成隨著向前方 移動’使上面部50c與下面部50d之距離逐漸變大。又，如 圖4所示’側面部5015係對引擎6〇之侧面63b傾斜成其前側 比後側更位於侧方（車寬方向之外側）。 如圖5或圖6所示’遮板40之前側導板42位於導壁50之 前。即’左侧之橫板42L位於導壁50之前，該橫板42L將走 行風引導至導壁50所形成之空氣流通路bi(參照圖4)。如 圖4所示，導壁50之前端緣5〇a係比遮板40之外框41更靠近 車寬方向之中心側’位於比外框41之後端緣4 1 d更前方， 由側方被外框41所覆蓋。又，如圖6所示，形成於内框43 之導板43a係位於下面部50d之前，與該下面部50d平行地 被設置。 如上所述，導壁50係被安裝於引擎60。詳言之，在汽缸 蓋63之侧面63b之上下分離之2個位置，形成向側方突出， 且形成有螺栓孔之凸台63j、63e。在導壁50之車寬方向之 136090.doc 12 200938424 中心側之端緣形成安裝部50f、50g，該安裝部5〇f、5〇§被 螺栓59、58固定於凸台63j、63e。 如以上所說明，機車！包含有引擎6〇與導壁5〇，引擎6〇 係配置於由前方承受車輛之走行所產生之走行風之位置， • 冑壁％係由汽缸蓋63之外面突出，並以與走行風相向之方 式安裝於引擎60,將走行風引導至引擎6〇之外面。依據機 • 車1 ’即使在汽缸蓋《之外面有難以接觸走行風之部分（在 卩上之說明中，為凹部63a)之情形，也可藉由導壁50將走 行風引導至該部分，故可減低汽缸蓋63之外面之冷卻效果 均。又，因導壁50係安裝於引擎6〇之構件故可利用 簡單之構造將走行風引導至汽缸蓋63之外面。即，即使在 引擎60之配置位置及凹部63a之位置有改變之情形，也可 藉由改變導壁50之安裝位置等而容易地將走行風引導至y 擎60之外面。 又，在機車！*，導壁50係由汽缸蓋63之側面6外突出 φ 後，向前方延伸。藉此，可有效地將由前方流過來之走行 風引導至汽缸蓋63之側面63 b。 又，導壁50係具有沿著汽缸蓋63之側面63b向前方延伸 之侧面部50b、及由該側面部5〇b之緣向側面63b延伸之上 面部50c與下面部50d。藉此，可抑制側面部5〇b所承受之 走行風不被引導至汽缸蓋63之側面63b而迂迴過侧面部5〇b 流向車體後方。 又，導壁50係沿著汽缸蓋63之側面63b向前方延伸構 成被該側面63b與該導壁50所包圍之空氣流通路B1，導壁 136090.doc 13 200938424 5〇係形成隨著向前方移動，空氣流通路扪之剖面逐漸變 大。藉此，可利用導壁50承受更多之走行風。 又導壁50係由汽缸蓋63之側面63b突出後，向前方延 伸，其前端50a位於比汽缸蓋63更前方。藉此，可利用導 壁50承受碰到汽缸蓋63而變成亂流前之走行風。 又，導壁50係沿著汽缸蓋63之側面63b向前方延伸，構 ' 成被該側面6外與該導壁5〇所包圍之空氣流通路B1，在導 壁5〇之前，配置有將走行風引導至空氣流通路B1之第2導 壁（在以上之說明中，為遮板4〇)。藉此，可有效地將走行 風引導至空氣流通路B1。 又上述第2導壁係配置於引擎60之前，將走行風引導 至該引擎60之遮板40。藉此，與設置將走行風引導至導壁 5 0之專用之構件之情形相比，可減少零件個數。 又導壁50係由汽紅蓋63之側面63b突出後，向前方延 伸，位於比遮板40之後端緣41d更前方。藉此，可圓滑地 ❿ 將遮板40所形成之走行風之氣流引導至導壁50所構成之空 氣流通路B1。 又，導壁50係具有下面部5〇d，其係構成空氣流通路扪 之下面，第2導壁（在以上之說明中，為遮板4〇)係具有板部 (在以上之說明中，為導板43a)，其係在該下面部5叼之 前，向該下面部50d之延伸方向延伸。藉此，可更有效地 將走行風引導至空氣流通路B1。 又’在汽虹蓋63之側面63b形成向内側凹入之凹部63a， 導壁50係配置成將走行風引導至凹部63a，並形成可將被 136090.doc 14· 200938424 導壁50引導之走行風由該凹部63 a排出用之空氣流通路 B3。藉此’可使流入凹部63a之走行風圓滑地由該凹部63a 流出，故可增加凹部63a之冷卻效果。 又，凹部63 a係形成於引擎60之側面63b，導壁50係配置 成可形成將被該導壁50引導至凹部63 a之前述走行風向後 方排出之空氣流通路B3。藉此，可使流入凹部63a之空氣 • 向後方排出，使凹部63a之空氣流通路B2、B3之空氣流變 得圓滑。 又’引擎60係包含内部形成燃燒室之汽缸蓋63，導壁5〇 係以由汽缸蓋63之側面63b突出之方式被安裝於引擎6〇， 將走行風引導至汽缸蓋63之側面63b。藉此，可增加產生 多量之熱之汽缸蓋63之冷卻效果。 又，汽缸蓋63係具有火星塞65 ,其係由該汽缸蓋“之侧 面63b***該汽缸蓋之燃燒室；導壁5〇係將走行風引導至 汽缸蓋63之側面63b之火星塞65之安裝位置（在以上之說明 ❹ 中，為凹部63a)〇藉此，可增加火星塞65或其附近之冷卻 效果。 又，在機車1中，火星塞65之安裝位置係設置於由汽缸 蓋63之側面63b向内側凹入之位置（在以上之說明中，為凹 邛63a)。藉此，即使在走行風難以流向凹部“a之情形， 也可藉由導壁50所引導之走行風冷卻凹部—，可減低引 擎60之外面之冷卻效果之不均。 又，本發明並不限於以上說明之機車i，可作種種之變 更。例如，在以上之說明中，導壁50將走行風引導至作為 I36090.doc 200938424 引擎60之夕卜品士 & 卸之Η缸蓋63之側面63b。但，導壁50也可設 成冬走行風引導至引擎60之外面之其他部分。例如，導壁 〇也可°又成將走行風引導至汽缸體02、及汽缸蓋63之背面 62g、63g 〇 又’引擎60雖以空冷式之引擎加以說明，但引擎6〇也可 為水冷式之引擎。此情形，也可以冷卻水冷卻引擎60，並 將導壁女褒成可將走行風引導至該冷卻水不能充分冷卻之 部分。 ❹❹ According to the present invention, even if a portion of the engine outside which is difficult to contact with the traveling wind is generated, the traveling wind can be guided to the crucible by the guide wall, so that the uneven cooling effect outside the engine can be reduced. Further, since the guide wall is attached to the engine member, the traveling wind can be guided to the outside of the engine by a simple structure as compared with the case where the vehicle body cover is formed into the vehicle body cover to guide the traveling wind to the outside of the engine. Further, the above-mentioned straddle-type vehicle is a vehicle in which a rider sits on a seat cushion, such as a locomotive (including a speed keda), a snowmobile, a four-wheeled truck, or the like. [Embodiment] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a side view of a locomotive 1 according to an embodiment of the present invention, and Fig. 2 is an enlarged side view of a front portion of the locomotive 1. As shown in Fig. 1, the locomotive 1 has a front wheel 3, a rear wheel 4, a body frame 20, a front slab 30, a rectifying plate 39, a shutter 40, a guide wall 50, and an engine 60. Further, the body frame 20 includes a head pipe 21, a main pipe 22, and a down pipe 23. The head pipe 21 is located at the front end of the body frame 20, and rotatably supports a steering shaft (not shown) disposed on the inner side thereof. The front end of the main pipe 22 and the upper end of the down pipe 23 136090.doc • 6 · 200938424 (front end) are connected to the head pipe 21. The main pipe 22 extends rearward from the head pipe 21, and the lower pipe 23 extends obliquely downward from the head pipe 21. A fuel tank 5 for storing fuel is disposed above the main pipe 22, and a seat cushion 6 for the rider to straddle is disposed behind the fuel tank 5. Upper and lower brackets 8 and 7 are mounted at the upper and lower ends of the steering shaft. The upper bracket 8 and the lower bracket 7 hold the upper and lower portions of the front suspension 9 by the left and right ends thereof. The front suspension 9 is provided to extend obliquely downward, and the axle of the front wheel 3 is supported by the lower end portion thereof. Further, the front suspension 9 is an upright type suspension frame having an outer tube 9a at its lower portion, and an inner tube 9b is inserted through the outer tube 9a from above. A large diameter portion 9c having a diameter larger than the other portion of the outer tube % is formed at the upper end '' of the outer tube 9a. The front fender 30 is disposed between the pair of front suspensions 9, and is covered with the front wheel 3 from above. Fig. 3 is a perspective view of the front dredging plate 30 in the case where the front fender 3 is viewed in the direction indicated by m in Fig. 2. As shown in FIG. 2 or FIG. 3, the front fender 3 has an upper surface portion 3A, a rear side portion 10b, and a front side portion 30c. The upper face portion 30a forms an axle of the front wheel 3 which is medium to curved and is located obliquely above the front wheel 3. The rear side surface portion 3〇b is provided to extend downward from the left and right edges of the upper surface portion 30a, and is located on the side of the front wheel 3 and inside the front suspension frame 9 (center side in the vehicle width direction) (see Fig. 3). Front side portion 3〇. It is arranged to extend downward from the left and right edges of the upper surface portion 30a, and is located on the side of the front wheel 3 and before the suspension 9 (see Fig. 3). As shown in Fig. 3, the front side surface portion 3〇c extends obliquely rearward toward the outer side of the outer peripheral surface of the outer surface S9a in the vehicle width direction. That is, the front side portion 3〇C is formed to gradually expand to the side as it approaches the front suspension 9, thereby forming a rearward side to the outer tube along the front side portion 30c 136090.doc 200938424 when the vehicle is lightly traveling. The sleek airflow A1 of the wind on the side of 9a. As shown in Fig. 2, the rectifying plate 39 is a plate-like member that is long in the vertical direction, and is disposed behind the outer tube 9a. Further, as shown in Fig. 3, the rectifying plate 39 is disposed so as to be surrounded by the outer circumference of the outer tube 9a. The center side of the vehicle width direction is inclined, and the rear end edge 39b is closer to the center side than the front end edge 39a. Thereby, it is possible to form the airflow A2 which is smoothly slanted rearward from the side of the outer tube % along the rectifying plate 39. Further, as shown in Fig. 3, the rectifying plate 39 has a plate-like mounting portion 39c on its inner side (for example, a mounting portion 39; for example, a boss 9d which is bolted to a large diameter ❹ 卩 9c provided in the outer tube %) Further, as shown in Fig. 2, behind the rectifying plate 39, a brake hose 13 is disposed. This brake hose 13 is connected to a caliper 12 that sandwiches the brake disc 11 that rotates simultaneously with the front wheel 3. The engine 60 is driven. The air-cooled air-cooled engine is placed in the position of the traveling wind that flows to the rear of the vehicle body through the upper and left and right sides of the front fender when the vehicle is traveling from the front (in the direction not in the direction of Fr). 2, the engine 6 is disposed behind the front fender 3〇 to be exposed outside the crucible. Further, the engine 60 is located below the main pipe 22 and is behind the lower pipe 23 (refer to FIG. 1). The 22 suspensions ' are supported by brackets 23a provided at the front end of the down tube 23. As shown in Fig. 2, the engine 60 includes a crankcase 61 that houses a crankshaft (not shown). a cylinder block 62 (not shown), a cylinder head 63 internally forming a combustion chamber for burning fuel, and a cylinder cover 63 63. The shaft I mesh 61 is located below the engine 6〇, and the cylinder block is disposed above the crankcase 61 so that the axis of the cylinder faces obliquely upward. The cylinder head 63 is attached to the π cylinder 62. Upper part. Also on the side (four) of the cylinder head 63, 136090.doc 200938424 is installed on the spark plug 65 containing the mixture of air and fuel sent to the combustion chamber. The spark plug 65 is inserted from the outside of the cylinder head 63. The front end portion reaches the combustion chamber. Further, on the outer surface of the cylinder head 63 and the cylinder block 62, a cooling fin 60a is formed, and FIG. 4 is a cross-sectional view taken along line IV-IV shown in FIG. 2. As shown in FIG. The side surface 6 of the cover 63 is provided with a concave portion 63a recessed toward the inner side. The side wall 63f constituting the concave portion - 63a is located on the inner side (inner side) of the other portion of the side surface 63b. At the bottom wall 63h of the concave portion 63a, the insertion of Mars is formed. Further, as shown in Fig. 2, the spark plug 65 is covered with a plug cover 65ae that connects the spark plug 65 and an ignition coil (not shown), and is disposed on the side of the recess 63a. There is a guide wall 5〇 for guiding the traveling wind to the concave portion 63a. About this guide wall 5〇, after the tolerance As shown in Fig. 2, before the engine 60 and behind the front fender 3, a shutter 40 is disposed, and the shutter 40 can guide the wind passing over the front fender 3 and the side. To the engine 60. Fig. 5 is a front view of the shutter 40, and Fig. 6 is a side view of the shutter 4 and the guide wall 50. As shown in Fig. 5, the shutter 40 has a front face of the cylinder head 63 and the cylinder block 62. The side guides 42 are located on the left and right outer frames 41 and 41 of the front side guide 42 and on the left and right sides of the front side guide 42 and on the inner side of the outer frames 41 and 41 (the center side in the vehicle width direction). Inner frames 43, 43. Further, in the figure, the outer frame 4 1 and the inner frame 43 are partially cut away to show the side guide 42 disposed on the inner side thereof. The outer frames 41, 41 are attached to the left and right of the down tube 23, and are supported by the down tube 23. In detail, a reinforcing plate 28 (refer to Fig. 1) is provided between the upper end of the down tube 23 and the main pipe 22. Here, the reinforcing plate 28 is fitted with a strip 49, 136090.doc 200938424 49 extending laterally. As shown in Fig. 5, cylindrical shock absorbers 49a, 49a are provided at the front ends of the stays 49, 49. The outer frame 41 is above the front side guide 42 and has an upper surface portion 41a extending toward the downward tube 23 side, and the front end portion 41a has a mounting portion 41b for gripping the damper 49a. Further, in the bracket 23a provided at the lower end of the down tube 23, the stays 48, 48 extending to the side are attached. ^ The lower edge of the outer frame 41 is formed with a mounting portion 41c' which protrudes toward the downward tube 23 side. This mounting portion 41c fixes the front end of the stay 48. Then, the side guide 42 is provided with a plurality of horizontal plates 42L, 42R» between the lower tube 23 and the outer frame 41. The plurality of horizontal plates 42L are disposed on the left side of the down tube 23. The arrangement is arranged up and down, and a plurality of (here, three) horizontal plates 42R are arranged on the right side of the down tube 23 so as to be arranged up and down. The plurality of horizontal plates 42L and 42R are guided to the engine 60 side along the running wind which is inclined obliquely downward from the upper surface portion 3〇a. A pillar portion 42a that supports these is provided between each of the horizontal plates 42L and between the horizontal plates 42R. The front side guide 42 has a support portion 42e extending in the center thereof along the outer circumferential surface of the down tube 23 and curved in the shape of the outer peripheral surface. The support portion 42e forms a mounting portion 42f that protrudes laterally. The brackets 23b and 23b projecting laterally are formed in the down tube 23, and the attachment portion 42f is fixed to the bracket 23b by bolts 47. The inner frames 43, 43 are located on the left and right sides of the front side guide 42 and are disposed inside the outer frames 41 and 41 (on the center side in the vehicle width direction) so as to extend in the vertical direction. The inner frame 43' on the left side forms a plate-like guide plate 43a projecting inward from the lower end edge of the inner frame 43. The front end of this guide 43a is located away from the down tube 23. Further, the inner frames 43, 43 are integrally formed with the front side guide 42. 136090.doc 200938424 Further, an alarm 71 that emits an alarm sound in accordance with the operation of the rider is disposed on the side of the down tube 23. This alarm 71 is located in the space between the upper horizontal plate 42R and the upper surface 41a of the right outer frame 41 of the plurality of horizontal plates 42R provided on the right side of the down tube 23, and is exposed to the front of the vehicle. DETAILED DESCRIPTION Referring to the guide wall 50, Fig. 7 is a side view of the guide wall 50 from the inside (engine 6 〇 side), and Fig. 8 is a front view of the guide wall 50. The guide wall 50 guides the traveling wind flowing from the front of the engine 60 to the metal member on the side of the engine 60, and protrudes laterally from the side of the engine 60 to be attached to the engine 60 so as to face the running wind. More specifically, the guide wall 5 is protruded laterally on the side of the recess 63a formed in the cylinder head 63, and is provided to guide the traveling wind to the recess 63a (see Fig. 4). As shown in Fig. 4, the guide wall 50 is extended to the side and bent to extend forward. Further, the front end edge 50a is located forward of the front face 63i of the cylinder head 63 (refer to Fig. 6). The guide wall 50 is disposed to guide the traveling wind to the concave portion 63a, and to form an air flow passage for discharging the traveling wind backward from the concave portion 63a. More specifically, as shown in Fig. 4, the leading edge 50e of the guide wall 5A is located on the side of the central portion in the front direction of the recess 63a, and the wall 63d on the rear side of the recess 63a is located rearward of the rear edge 50e. Thereby, not only the air flow path B2 on the side opposite to the concave portion 63a from the guide wall 5, but also the air flow path B3 on the rear side of the vehicle body behind the concave portion 63a can be formed. The guide wall 50 extends forward along the side surface 63b of the cylinder head 63, and constitutes an air flow path Bi surrounded by the side surface 63b and the guide wall 5'. More specifically, the guide wall 5 has a side surface portion 50b' which is formed to extend laterally from the side surface 63b and then extends forward along the side surface 63b. The upper edge of the side surface portion 5〇b and the lower edge 136090.doc 200938424 are curved toward the side surface 63b side, and the guide wall 5〇 has an upper surface portion 50 extending from the upper edge and the lower edge of the side surface portion 5〇b toward the side surface 63b side ( With the lower portion 50d (see Fig. 8), the upper surface portion 5 (the end edge of the lower surface portion 5〇d extends forwardly along the side surface 63b) the upper surface portion 50 (the air portion is formed with the lower portion 5〇d). Further, as shown in Fig. 4, the lower portion 50d is formed such that its front end edge 50h extends obliquely toward the outer side in the vehicle width direction. The exhaust pipe 66 is disposed before the front end edge 50h. The inner side of the guide plate 43a of the plate 4A extends downward. As shown in Fig. 7, the guide wall 50 is formed to gradually move toward the front, and the air flow path B1 formed in conjunction with the side surface 63b of the engine 6 is gradually enlarged. More specifically, the 'upper face portion 50c is inclined upward toward the lower portion 50d so as to move forward' so that the distance between the upper face portion 50c and the lower portion 50d becomes larger. Further, as shown in Fig. 4, the side portion 5015 is paired with the engine. The side surface 63b of the 6〇 is inclined such that its front side is located more laterally than the rear side (outside of the vehicle width direction). As shown in FIG. 5 or FIG. The front side guide 42 of the shutter 40 is located before the guide wall 50. That is, the left side horizontal plate 42L is located before the guide wall 50, and the horizontal plate 42L guides the traveling wind to the air flow path bi formed by the guide wall 50 (refer to 4), as shown in FIG. 4, the front end edge 5〇a of the guide wall 50 is located closer to the center side of the outer frame 41 than the rear end edge of the outer frame 41. The side is covered by the outer frame 41. Further, as shown in Fig. 6, the guide plate 43a formed on the inner frame 43 is located in front of the lower surface portion 50d, and is disposed in parallel with the lower surface portion 50d. As described above, The wall 50 is attached to the engine 60. In detail, at two positions separated above and below the side surface 63b of the cylinder head 63, bosses 63j, 63e projecting laterally and having bolt holes are formed. 136090.doc 12 200938424 The end edge of the center side forms mounting portions 50f and 50g, and the mounting portions 5〇f and 5〇 are fixed to the bosses 63j and 63e by bolts 59 and 58. As explained above, The locomotive consists of an engine 6 〇 and a guide wall 5 〇, and the engine 6 配置 is placed in a walking wind generated by the front of the vehicle. The sill wall % is protruded from the outer surface of the cylinder head 63 and is attached to the engine 60 so as to face the running wind, and guides the traveling wind to the outside of the engine 6 。. According to the machine • the car 1 'even outside the cylinder head In the case where it is difficult to contact the portion of the traveling wind (in the description of the crucible, the recess 63a), the traveling wind can be guided to the portion by the guide wall 50, so that the cooling effect on the outer surface of the cylinder head 63 can be reduced. Since the guide wall 50 is attached to the engine 6 〇, the traveling wind can be guided to the outside of the cylinder head 63 by a simple structure. That is, even if the position of the engine 60 and the position of the recess 63a are changed, the traveling wind can be easily guided to the outside of the yoke 60 by changing the mounting position of the guide wall 50 or the like. Also, in the locomotive! *, the guide wall 50 protrudes outward from the side surface 6 of the cylinder head 63 and then extends forward. Thereby, the running wind flowing from the front can be efficiently guided to the side surface 63 b of the cylinder head 63. Further, the guide wall 50 has a side surface portion 50b extending forward along the side surface 63b of the cylinder head 63, and a surface portion 50c and a lower surface portion 50d extending from the edge of the side surface portion 5b to the side surface 63b. Thereby, it is possible to prevent the traveling wind that is received by the side surface portion 5b from being guided to the side surface 63b of the cylinder head 63 and returning to the rear side of the vehicle body by the side surface portion 5b. Further, the guide wall 50 extends forward along the side surface 63b of the cylinder head 63 to constitute an air flow path B1 surrounded by the side surface 63b and the guide wall 50. The guide wall 136090.doc 13 200938424 Moving, the profile of the air flow path is gradually enlarged. Thereby, the guide wall 50 can be used to withstand more running winds. Further, the guide wall 50 is protruded forward by the side surface 63b of the cylinder head 63, and its front end 50a is located further forward than the cylinder head 63. Thereby, the guide wall 50 can be subjected to the running wind before hitting the cylinder head 63 and becoming turbulent. Further, the guide wall 50 extends forward along the side surface 63b of the cylinder head 63, and constitutes an air flow path B1 surrounded by the side surface 6 and the guide wall 5, and is disposed before the guide wall 5? The traveling wind is guided to the second guide wall of the air flow path B1 (in the above description, it is a shutter 4). Thereby, the running wind can be efficiently guided to the air flow path B1. Further, the second guide wall is disposed before the engine 60, and guides the traveling wind to the shutter 40 of the engine 60. Thereby, the number of parts can be reduced as compared with the case of providing a dedicated member for guiding the traveling wind to the guide wall 50. Further, the guide wall 50 is protruded forward by the side surface 63b of the steam red cover 63, and is located forward of the end edge 41d of the shutter 40. Thereby, the airflow of the traveling wind formed by the shutter 40 can be smoothly guided to the air flow passage B1 constituted by the guide wall 50. Further, the guide wall 50 has a lower portion 5〇d which constitutes the lower surface of the air flow path 扪, and the second guide wall (in the above description, the shutter 4〇) has a plate portion (in the above description) The guide plate 43a) extends in the extending direction of the lower surface portion 50d before the lower surface portion 5'. Thereby, the traveling wind can be guided to the air flow path B1 more efficiently. Further, a recess 63a recessed inwardly is formed on the side 63b of the caviar cover 63, and the guide wall 50 is configured to guide the traveling wind to the recess 63a and form a guide which can be guided by the 136090.doc 14·200938424 guide wall 50. The air is discharged from the concave portion 63a by the air flow path B3. Thereby, the running wind of the inflow concave portion 63a can be smoothly flowed out from the concave portion 63a, so that the cooling effect of the concave portion 63a can be increased. Further, the concave portion 63a is formed on the side surface 63b of the engine 60, and the guide wall 50 is disposed so as to form an air flow path B3 for discharging the guide wind 50 to the rear side of the concave portion 63a. Thereby, the air flowing into the concave portion 63a can be discharged rearward, and the air flow in the air flow paths B2, B3 of the concave portion 63a can be made smooth. Further, the engine 60 includes a cylinder head 63 that internally forms a combustion chamber, and the guide wall 5 is attached to the engine 6A so as to protrude from the side surface 63b of the cylinder head 63, and guides the traveling wind to the side surface 63b of the cylinder head 63. Thereby, the cooling effect of the cylinder head 63 which generates a large amount of heat can be increased. Further, the cylinder head 63 has a spark plug 65 which is inserted into the combustion chamber of the cylinder head by the side surface 63b of the cylinder head; the guide wall 5 is used to guide the traveling wind to the spark plug 65 of the side 63b of the cylinder head 63. The mounting position (in the above description, the recess 63a) is thereby increased in cooling effect of the spark plug 65 or its vicinity. Further, in the locomotive 1, the mounting position of the spark plug 65 is provided by the cylinder head 63. The position where the side surface 63b is recessed toward the inner side (in the above description, it is the concave concavity 63a). Thereby, even in the case where it is difficult for the traveling wind to flow to the concave portion "a, the wind can be cooled by the guide wall 50. The recesses - can reduce the unevenness of the cooling effect on the outer surface of the engine 60. Further, the present invention is not limited to the locomotive i described above, and various changes can be made. For example, in the above description, the guide wall 50 guides the running wind to the side 63b which is the I36090.doc 200938424 engine 60 and the unloading cylinder head 63. However, the guide wall 50 can also be configured to guide the winter wind to other portions of the exterior of the engine 60. For example, the guide wall 〇 can also guide the running wind to the cylinder block 02 and the back faces 62g, 63g of the cylinder head 63. The engine 60 is described by an air-cooled engine, but the engine 6 can also be water-cooled. Engine. In this case, it is also possible to cool the water-cooled engine 60 and to guide the female guides to guide the running wind to the portion where the cooling water is not sufficiently cooled. ❹
又’在以上之說明中，作為跨坐型車輛，雖以機車1為 例加以說明’但本發明例如也可適用於四輪貨車等。 【圖式簡單說明】 圖1係有關本發明之實施型態之機車之側面圖。 圖2係上述機車之前部之放大側面圖。 圖3係圖2之III所示之方向之前擋泥板之立體圖。 圖4係阊2所示之IV-IV線之剖面圖。 圖5係遮板之正面圖。 圖6係遮板及導壁之側面圖。 圖7係由内側（引擎側）挑望導壁之側面圖。 圖8係導壁之正面圖。 【主要元件符號說明】 1 機車 3 前輪 4 後輪 7 下托架 136090.doc 16- 200938424 ❹ ⑩ 8 上托架 9 前懸架 20 車體架 21 頭管 22 主管 23 向下管 30 前擋泥板 39 整流板 40 遮板 41 外框 42 前側導板 43 内框 50 導壁 50b 側面部 50c 上面部 50d 下面部 60 引擎 61 曲轴箱 62 汽缸體 63 汽缸蓋 63a 凹部 63b 汽缸蓋之側面 A1、A2、B1、B2、B3 空氣流通路 136090.doc -17-Further, in the above description, the locomotive 1 is described as an example of the straddle type vehicle. However, the present invention is also applicable to, for example, a four-wheeled truck or the like. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a side view of a locomotive relating to an embodiment of the present invention. Figure 2 is an enlarged side elevational view of the front portion of the locomotive. Figure 3 is a perspective view of the front fender in the direction shown in III of Figure 2. Figure 4 is a cross-sectional view taken along line IV-IV of Figure 2. Figure 5 is a front view of the shutter. Figure 6 is a side view of the shutter and the guide wall. Fig. 7 is a side view showing the guide wall from the inner side (engine side). Figure 8 is a front elevational view of the guide wall. [Main component symbol description] 1 Locomotive 3 Front wheel 4 Rear wheel 7 Lower bracket 136090.doc 16- 200938424 ❹ 10 8 Upper bracket 9 Front suspension 20 Body frame 21 Head tube 22 Main tube 23 Down tube 30 Front fender 39 Rectifier 40 Shutter 41 Outer frame 42 Front side guide 43 Inner frame 50 Guide wall 50b Side part 50c Upper part 50d Lower part 60 Engine 61 Crankcase 62 Cylinder block 63 Cylinder head 63a Recessed part 63b Side faces A1, A2 of cylinder head B1, B2, B3 air flow path 136090.doc -17-