1354729 六、發明說明： 【發明所屬之技術領域】 . 本發明係關於一種水冷式引擎汽缸頭構造，尤指一種可增進 汽缸頭之散熱性，以及提升汽紅頭之抗爆震強度之水冷式引擎之 汽&L頭構造。 【先前技術】 按，一般車輛之作動，如機車、全地型車輛…等，乃係將外 • 界導入之新鮮空氣和燃油混合為油氣後，再將油氣輸入引擎燃爆 -產生動力，而推動活塞做往復運動，經由曲軸帶動皮帶變速機構 來進行傳動，以達到行進之目的。 而引擎因散熱方式不同，可分為氣冷式引擎及水冷式引擎二 種，其中，習知水冷式引擎丄，如圖一、二所示，該汽缸本體工 1上方設有汽缸頭12，而汽缸本體1丄内則設有一活塞i 4， 该汽紅本體11設有冷卻水入口111及冷卻水流道112;該 •汽紅頭12設置有一進氣通道121及-排氣通道12 2，於汽 缸頭12之内部具有-燃燒室丄5 ;另於汽缸本體丄 1與汽缸頭 12之間。又有塾片13，該墊片13上開設有穿孔131，藉 由該穿孔1 3 1，可令引擎1中之冷卻水經由穿孔1 3 ]L到達汽 缸頭12中的冷卻水通道12 4，而汽缸組2另設有—冷卻水 出1 2 3藉此/X紅本體工丄及汽缸頭工2中流動之冷卻水， 會通往散熱器（圖中未示出）散熱，以達到冷卻引擎i之目的。 另如圖―、三所示，為制於火星塞1 6裝設與維修，該火 3 29 2基,1 6係从傾斜角度方式安裝於汽缸頭丄2上;另汽缸頭1 2 置Γ進氣閥17及—排氣間18，藉此來供應引擎1燃 —…㈤之進、排氣及燃油。如圖三所示，習用引擎1由於火星 16係以傾斜角度方式安裝於汽紅頭12上，因此該汽缸頭丄 f立於鍵輪室19側形成-較大面積之冷卻水通幻24 ;而該 汽紅頭12的冷卻水流動方向，係由墊片13上之穿孔】3 ^ 〇到汽紅頭12的冷卻水通道12 4内，再由冷卻水出σ丄2 3 机出’错此來將汽缸頭12的熱源帶出，進而來令汽缸頭工2 到散熱之目的。 ，惟、如吾人所知’引擎！之動力係藉由燃油於燃燒室丄5燃 额’藉由雜爆力録塞i 4所產生，因此麵油於燃燒 至15燃爆後，其燃爆力除可推動活塞i 4外，汽缸頭丄2之燃 燒至1 5同樣會受到燃油燃爆力之>1力。因此汽缸頭1 2之冷卻 尺通道12 4至燃燒室15之間的壁12 5之厚度，直接影響了 紅頭1 2抗爆震強度。當汽缸頭1 2之冷卻水通道1 2 4至燃 燒室15之間的壁丄2 5之厚度較厚時，固然可增加汽缸頭丄2 之抗爆震強度，但確也會因壁丄2 5之厚度較厚而造成汽缸頭工 2散熱不良，進而使汽缸頭丄2耐用度降低；惟、如以汽缸頭工 2之冷卻水通道i 2 4至燃燒室15之間的壁12 5較薄厚度來 貝方也8寸，雖然可增進汽缸頭1 2之散熱性，但卻會造成汽缸頭1 2的抗爆震強度大大的降低，因此極容易造成火星塞16、進氣 閥17及排氣閥18三構件之穩固性喪失，進而會使進氣閥17 1354729 ，嚴重者亦會使火星塞16、進氣闕1354729 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a water-cooled engine cylinder head structure, and more particularly to a water-cooled engine which can improve the heat dissipation of a cylinder head and enhance the anti-knocking strength of a steam red head. The steam & L head construction. [Prior Art] According to the general vehicle, such as locomotives, all-terrain vehicles, etc., the fresh air and fuel introduced into the outer boundary are mixed into oil and gas, and then the oil and gas input engine is blasted to generate power. The piston is pushed to reciprocate, and the belt shifting mechanism is driven by the crankshaft to drive to achieve the purpose of traveling. The engine can be divided into two types: an air-cooled engine and a water-cooled engine. The conventional water-cooled engine 丄, as shown in Figures 1 and 2, has a cylinder head 12 above the cylinder body 1. A piston i 4 is disposed in the cylinder body 1 , and the steam red body 11 is provided with a cooling water inlet 111 and a cooling water passage 112 . The steam red head 12 is provided with an intake passage 121 and an exhaust passage 12 2 . The interior of the cylinder head 12 has a -combustion chamber 丄5; and between the cylinder body 丄1 and the cylinder head 12. There is a cymbal 13 which is provided with a perforation 131. The perforation 13 1 allows the cooling water in the engine 1 to reach the cooling water passage 12 4 in the cylinder head 12 via the perforation 13 3 L. The cylinder group 2 is additionally provided with cooling water out of 1 2 3, whereby the cooling water flowing in the /X red body work and the cylinder head 2 will heat to the radiator (not shown) for cooling. The purpose of the engine i. As shown in the figure ―, three, for the installation and maintenance of the Mars plug 1 6 , the fire 3 29 2 base, 16 6 is installed on the cylinder head 丄 2 from the oblique angle; the other cylinder head 1 2 The intake valve 17 and the exhaust chamber 18 are used to supply the intake, exhaust and fuel of the engine 1 (5). As shown in FIG. 3, the conventional engine 1 is mounted on the steam red head 12 at an oblique angle to the Mars 16 system, so that the cylinder head 丄f stands on the side of the key wheel chamber 19 to form a large area of cooling water through the illusion 24; The flow direction of the cooling water of the steam red head 12 is made by the perforation of the gasket 13 3 ^ 〇 into the cooling water passage 12 4 of the steam red head 12, and then the cooling water out σ 丄 2 3 machine is out. The heat source of the cylinder head 12 is taken out, thereby causing the cylinder head 2 to dissipate heat. , but, as I know it, the engine! The power is generated by the fuel in the combustion chamber 丄5 burning amount by the miscellaneous explosive force recording i 4, so after the surface oil is burned to 15 after the explosion, its explosive force can push the piston i 4, the cylinder The burning of the head 丄 2 to 15 will also be subject to the fuel blasting force > 1 force. Therefore, the thickness of the wall 12 5 between the coolant passage 12 4 of the cylinder head 12 and the combustion chamber 15 directly affects the anti-knocking strength of the red head 12. When the thickness of the wall 丄 2 5 between the cooling water passage 12 24 of the cylinder head 12 and the combustion chamber 15 is thick, the knocking strength of the cylinder head 丄 2 can be increased, but it is also due to the niche 2 The thicker thickness of 5 causes the cylinder head 2 to dissipate heat poorly, thereby reducing the durability of the cylinder head 丄2; however, if the cooling water passage i 2 4 of the cylinder head 2 is to the wall 12 5 between the combustion chambers 15, The thickness of the shell is also 8 inches, although it can improve the heat dissipation of the cylinder head 12, but it will cause the knocking strength of the cylinder head 12 to be greatly reduced, so it is easy to cause the spark plug 16, the intake valve 17 and The stability of the three components of the exhaust valve 18 is lost, which in turn causes the intake valve 17 1354729, and in severe cases, the spark plug 16, the intake 阙
爆震強度，造成 及排氣閥18的密閉性喪失， 1 7及排氣龆1 Q 4技i、. 2構造， 極度的難以兼顧之困擾。 又，如+人所知般，汽叙 A缸頭12之局部高溫係位於火星塞1The knocking strength causes the loss of the airtightness of the exhaust valve 18, and the exhaust enthalpy 1 Q 4 technology i, . 2 structure, extremely difficult to balance. Also, as known by +, the local high temperature of the steam cylinder A cylinder head 12 is located in the spark plug 1
• 帛上述引擎1之汽缸頭12的冷卻水流動方式， 旬习降溫目的。習 ，明顯未能對於火 星塞16及排氣則8處形成較多的冷卻水流動，是以習用上述 引擎1之汽叙頭i 2構造’明顯無法使汽叙頭丨2達成均勾降溫 目的。因此如何能有效解決，制引擎丄之汽紅頭2 2構造所存 在之有上述二大缺失，實為機車業者亟待解決的一大課題。 【發明内容】 為解決習用汽缸頭無法兼顧散熱性及抗爆震強度之缺失，進 鲁 而提升汽缸頭之散熱性，以及提升汽缸頭之抗爆震強度之目的。 本發明之主要技術手段，乃在提供一種水冷式引擎汽缸頭構 造’ δ亥引擎至少包括有》缸本體、汽叙頭及一墊片，該汽缸本體 上方設有汽缸頭’而汽缸本體内則設有一活塞，該汽缸本體設有 冷卻水入口及冷卻水流道；汽本體與汽缸頭之間設有塾片，該 墊片上至少設有一冷卻水通口；該汽缸頭設有冷卻水通道及冷卻 水出口，以及穿設連通於燃燒室之火星塞及至少一進氣閥及一排 氣閥，其中該火星塞係以傾斜及偏置方式被安裝在汽缸頭上，其 5 1354729 主要在於：該汽缸頭之冷卻水通道上設置有第一凸肋及第二凸 • 肋，該第—凸肋係由鏈輪室之内側壁向進氣閥方向延設，該第二 • 凸肋係由火星塞座向鏈輪室延設，藉由該第-凸肋及第二凸肋之 上端及下端，分別連結於冷卻水通道的上壁及下壁，藉此該第一 凸肋及第二凸肋可於冷卻水通道上形成補強柱，藉此可增進汽缸 頭之散熱性，以及提升汽缸頭之抗爆震強度。 本發明之次要技術手段在於’藉由第—凸肋所形成之緩流口 _ 的阻擋’可確保汽缸頭局部高溫之火星塞座及排朗處獲得較多 -的冷卻水，來進行降溫之動作，進而可使汽缸頭達到均勻降溫之 目的。 本發明之又一技術手段在於，藉由第二凸肋與閥壁所產生之 文氏官效應，更可使火星塞座、進氣閥及排氣閥處散熱效果增加。 【實施方式】 為使責審查員能更易於了解本發明之構造及所能達成之功 • 效，茲配合圖式說明如後： . 本發明之水冷式引擎2，如圖四、五所示，至少包括有汽缸 本體3、汽缸頭4及一墊片5。 該汽缸本體3上方設有汽缸頭4，而汽缸本體3内則設有一 活塞31，該汽缸本體3設有冷卻水入口 3 3及冷卻水流道3 2 ;汽缸本體3與汽缸頭4之間設有墊片5，該墊片5上至少設 有一冷卻水通口51 ;該汽缸頭4設有冷卻水通道4 2與冷卻水 出口4a，以及穿設連通於燃燒室41之火星塞6及至少一進氣 6 1354729 闊7及一排氣閥8 (以下圖式中以四閥門式為例），其中嗦火星夷 6係以傾斜及偏置方式被安裝在汽缸頭4上，汽缸頭4之a、土 通道4 2上方至少開設一洩砂孔4 3，於該洩砂孔4 3上密封 封閉元件4 31，藉此來將洩砂孔4 3予以密封；汽缸頭4之△ 卻水通道4 2上另至少設有第一凸肋44及第二凸肋45， 一凸肋44及第二凸肋45間隔著洩砂孔43。藉此引擎 冷卻水分別經由汽缸本體3之冷卻水流道3 2、墊片$之^ 通口 5 1及汽缸則之冷卻水通道4 2及冷卻水出口 4 a 到冷卻引擎2之目的。 # 次請配合圖五、六參閱，該汽缸頭4之冷卻水通道4 2上之 第-凸肋4 4，係由鏈輪室9之内側壁9 a向進氣们方向延 設，並於近進氣閥7處形緩流σ 4 4 2，且該第—凸肋〇之上 端及下端分別連結於冷卻水通道4 2的上壁4 2工及下壁〇 ^該汽紅頭4之冷卻水通道4 2上之第二凸肋4 5，係:火星 塞座6 a向鏈輪室9延設至财孔4 3外騎，且該第二凸肋4 5之上端及下端分別連結於冷卻水通道4 2的上壁4 2丄及下辟 42 2 ;藉此、藉由該第—凸肋4 4及第二凸肋4 $之設置，ς =水通則2上絲賴錄，_可斯_4的 強度。另凸肋4 4之前端具有係可辅折部4 (或·弓弧部），藉此進而與進氣闕7形成-緩流σ442， 進而可限制冷卻水流向進氣閥7處。 7 1354729 本發明之實施，請配合圖五、六、七參閱，本發明如圖七所 示，於墊片5上分別開設第一冷卻水通口 51 a、第二冷卻水通 口 51b、第三冷卻水通口 51c ’該三個冷卻水通口 51 a、 51b、51c皆係位於汽缸本體3之軸線3 a的鏈輪室9側的 同一側；再請配合圖六參閱，該第一冷卻水通口 51 a恰位於排 氣閥8處，而該第二冷卻水通口51b、第三冷卻水通口51 c 則係位於鏈輪室9之内側壁9 a側，且該第二冷卻水通口 51 I b、第三個冷卻水通口 51 c分別位於第一凸肋44之二側；藉 此、該冷卻水由汽缸本體3之冷卻水流道3 2經墊片5之冷卻水 通口 51之第一冷卻水通口 51 a、第二冷卻水通口 51b、第 三冷卻水通口51c進入汽缸頭4之冷卻水通道42内，該第一 冷卻水通口 51 a由於係位於排氣閥8處，因此可以直接對較高 溫的排氣閥8進行降溫之動作，該第一冷卻水通口 51 a流出之 冷卻水對排氣閥8進行降溫後，經第一流道4 2 a流經火星塞座 # 6 3後由冷卻水出口 4 a流出；該第二冷卻水通口 51b與火星 塞座6 a相對應’藉此由第二冷卻水通口 51b進入冷卻水通道 4 2之冷卻水’其一部份被第一凸肋4 4於進氣閥7所形成之緩 μ 口 4 4 2所阻撞’減少由第二冷卻水通口 51b進入冷卻水通 道4 2之冷卻水流向進氣閥7處，因此可以確保由第二冷卻水通 口51b流人的冷卻水大部份可以直接流向火星塞座6 3處，流 向火星基座6 a處的冷卻水恰被第二凸肋45之導引及間隔，分 別由第2 b流經火星塞座6 a與排關8之間，以及第 8 1354729 三流道4 2 c流經火星塞座6 a與進氣閥7之間，另可藉由第二 凸肋4 5與閥壁所產生之文氏管效應，更對火星塞座6 a、進氣 閥7及排氣閥8降溫效果具有加成效應，而後再由冷卻水出口 4 » a流出；該第三冷卻水通口 5 1 c流入冷卻水通道4 2之冷卻 水’由於可被第一凸肋44之阻擋又係靠近進氣閥7處，因此可 以直接對進氣閥7處進行降溫之動作，而後再由第四流道4 2 d 由冷卻水出口 4 a流出。 _ 本發明之功效在於，藉由在該汽缸頭4之冷卻水通道4 2上 設置第一凸肋44及第二凸肋4 5，且藉由該第一凸肋44及第 一凸肋4 5之上端及下端，分別連結於冷卻水通道4 2的上壁4 21及下壁4 2 2，藉此該第一凸肋44及第二凸肋4 5可於冷 卻水通迢4 2上形成補強柱，而可提升汽缸頭4的抗爆震強度， 藉此冷卻水通道4 2之下壁4 2 2 (即燃燒室的上側）可以以較 薄的壁來實施，進而更可增進汽缸頭4的散熱效果。另藉由第一 φ凸肋44之阻擋’可確保汽虹頭4局部高溫之火星塞座6 &及排 氣閥8處獲得較多的冷卻水，來進行降溫之動作，進而可使汽紅 頭4達成均勻降溫之目的。再者、藉由第二凸肋4 5之設置’所 產生之文氏效應，更可使火星塞座6 a處散熱效果增加。 紅、上所述，本發明藉由上述之水冷式引擎汽缸頭構造，能有 效解決習知汽叙頭之缺生，并&士 ^ 、並此有效提升汽缸頭冷卻散熱及抗爆 展強度之功效，進—舟证且2丨敬 " ^ ^延長引擎之使用壽命，已較習用者增進功 放，頁已具有新穎性及進步性之要件，差依法提出發明之申請， 9 祈請貴審杳委 -女貝之稍’惠賜為 、 【圖式簡單說明】 專利之審疋，至感德便。 圖-係習知引擎之立體分解圖。 圖二係習知祕本體及紐歡局部触示意圖。 圖二係§知紐頭之局部剖面俯视示意圖。 圖四係本發明之引擎分解圖。 圖五係本發明之汽缸本體及汽缸頭之局部剖面示意圖。 圖六係本發明之實施例。 圖七係本發明之冷卻水通口之實施例。 【主要元件符號說明】 1引擎 11汽缸本體 111冷卻水入口 112冷卻水流道 12汽缸頭 121進氣通道 122排氣通道 12 3冷卻水出口 12 4冷卻水通道 1 3 1穿孔 1 6火星塞 1 8排氣閥 3 2冷卻水流道 1 2 5壁 1 3墊片 1 4活塞 1 5燃燒室 1 7進氣閥 1 9鏈輪室 2水冷式引擎 3汽叙本體 31活塞 1354729 4汽缸頭 5墊片 3 3冷卻水入口 3 a軸線 4 1燃燒室 4 2冷卻水通道 4 2 1上壁 4 2 2下壁 4 2 a第一流道 4 2 b第二流道 4 2 c第三流道 4 2 d第四流道 4 3洩砂孔 4 31封閉元件 4 4第一凸肋 4 41轉折部 4 4 2緩流口 4 5第二凸肋 4 a冷卻水出口 51冷卻水通口 • 6火星塞 7進氣閥 8排氣閥 9鏈輪室 51 a第一冷卻水通口 51b第二冷卻水通口 51c第三冷卻水通口 6 a火星塞座 9 a内側壁 11• The cooling water flow pattern of the cylinder head 12 of the above engine 1 is used for the purpose of cooling. Xi, obviously not able to form more cooling water flow for the Mars plug 16 and exhaust, the use of the above engine 1 steam head i 2 structure 'obviously can not make the steam head 丨 2 to achieve the purpose of cooling . Therefore, how to solve it effectively, there are two major shortcomings in the structure of the engine's steam red head 2 2, which is a major issue for the locomotive industry. SUMMARY OF THE INVENTION In order to solve the problem that the conventional cylinder head cannot balance the heat dissipation and the anti-knocking strength, the heat dissipation of the cylinder head and the anti-knocking strength of the cylinder head are improved. The main technical means of the present invention is to provide a water-cooled engine cylinder head structure. The δH engine includes at least a cylinder body, a steam head and a gasket. The cylinder body is provided with a cylinder head ' while the cylinder body is a piston is disposed, the cylinder body is provided with a cooling water inlet and a cooling water flow passage; a slab is disposed between the steam body and the cylinder head, and the gasket is provided with at least one cooling water port; the cylinder head is provided with a cooling water passage and a cooling water outlet, and a spark plug connected to the combustion chamber and at least one intake valve and an exhaust valve, wherein the spark plug is mounted on the cylinder head in an inclined and offset manner, wherein the main body is 5:354729 a first rib and a second rib are disposed on the cooling water passage of the cylinder head, and the first rib is extended from the inner side wall of the sprocket chamber toward the intake valve, and the second rib is formed by Mars The plug is extended to the sprocket chamber, and the upper and lower ends of the first rib and the second rib are respectively connected to the upper wall and the lower wall of the cooling water passage, whereby the first rib and the second convex Ribs can form reinforcement on the cooling water passage , Whereby the cylinder head can enhance the heat dissipation properties, and to enhance the anti-knocking strength of the cylinder head. The secondary technical means of the present invention is that 'the blockage of the slow flow port _ formed by the first ribs can ensure that the spark plug at the local high temperature of the cylinder head and the cooling water at the venting position obtain more cooling water to cool down. The action can further achieve the purpose of uniform cooling of the cylinder head. Another technical means of the present invention is that the heat dissipation effect of the Mars plug, the intake valve and the exhaust valve can be increased by the Venturi effect generated by the second rib and the valve wall. [Embodiment] In order to make it easier for the examiner to understand the structure of the present invention and the functions and effects that can be achieved, the following description is provided with the following description: The water-cooled engine 2 of the present invention is shown in Figs. At least the cylinder body 3, the cylinder head 4 and a gasket 5 are included. A cylinder head 4 is disposed above the cylinder body 3, and a piston 31 is disposed in the cylinder body 3. The cylinder body 3 is provided with a cooling water inlet 33 and a cooling water passage 3 2; and between the cylinder body 3 and the cylinder head 4 a gasket 5 having at least one cooling water port 51; the cylinder head 4 is provided with a cooling water passage 42 and a cooling water outlet 4a, and a spark plug 6 passing through the combustion chamber 41 and at least An intake air 6 1354729 wide 7 and an exhaust valve 8 (in the following figure, a four-valve type is taken as an example), wherein the Xinghu Xingyi 6 system is mounted on the cylinder head 4 in a tilting and offset manner, and the cylinder head 4 a, at least a sand venting hole 4 3 is formed above the soil passage 4 2 , and the sealing member 4 31 is sealed on the sand venting hole 4 3 , thereby sealing the sand blasting hole 4 3; the damper water channel of the cylinder head 4 Further, at least one of the first rib 44 and the second rib 45 is disposed on the second side, and a rib 44 and a second rib 45 are spaced apart from the sand venting hole 43. Thereby, the engine cooling water is passed through the cooling water flow path 3 of the cylinder body 3, the gasket 5, the port 5 1 and the cooling water passage 4 2 of the cylinder and the cooling water outlet 4 a to the purpose of cooling the engine 2, respectively. #次Please refer to Figure 5 and Figure 6. The first rib 4 4 of the cooling water passage 4 of the cylinder head 4 is extended from the inner side wall 9 a of the sprocket chamber 9 toward the air intake. The intake valve 7 is shaped like a slow flow σ 4 4 2 , and the upper end and the lower end of the first rib are respectively connected to the upper wall of the cooling water passage 4 2 and the cooling of the lower wall 该The second rib 4 5 on the water passage 4 2 is: the Mars plug 6 a is extended to the sprocket chamber 9 to the outer hole 4 3 , and the upper end and the lower end of the second rib 4 5 are respectively connected to The upper wall 4 2 丄 and the lower ridge 42 2 of the cooling water passage 4 2; thereby, by the arrangement of the first rib 4 4 and the second rib 4 $, ς = water 2 2 is on the silk, _ The strength of the s4. Further, the front end of the rib 4 4 has a detachable portion 4 (or a bow portion), thereby forming a slow flow σ 442 with the intake port 7, thereby restricting the flow of the cooling water to the intake valve 7. 7 1354729 The implementation of the present invention, please refer to FIG. 5, 6 and 7. Referring to FIG. 7 , the first cooling water port 51 a and the second cooling water port 51 b are respectively disposed on the gasket 5 . The three cooling water ports 51c' are located on the same side of the sprocket chamber 9 side of the axis 3a of the cylinder body 3; The cooling water port 51 a is located at the exhaust valve 8 , and the second cooling water port 51 b and the third cooling water port 51 c are located on the inner side wall 9 a side of the sprocket chamber 9 , and the second The cooling water port 51 I b and the third cooling water port 51 c are respectively located on two sides of the first rib 44; thereby, the cooling water is cooled by the cooling water channel 3 2 of the cylinder body 3 via the gasket 5 The first cooling water port 51a, the second cooling water port 51b, and the third cooling water port 51c of the water port 51 enter the cooling water passage 42 of the cylinder head 4, and the first cooling water port 51a is It is located at the exhaust valve 8, so that the lower temperature exhaust valve 8 can be directly cooled, and the first cooling water port 51 a is cooled. After the exhaust valve 8 is cooled, it flows through the spark plug seat # 6 3 through the first flow passage 4 2 a and then flows out through the cooling water outlet 4 a; the second cooling water port 51 b corresponds to the spark plug 6 a ' Thereby, the cooling water that enters the cooling water passage 4 from the second cooling water port 51b is partially blocked by the first rib 4 4 formed by the intake valve 7 The cooling water entering the cooling water passage 4 2 from the second cooling water port 51b flows to the intake valve 7, so that it is ensured that most of the cooling water flowing from the second cooling water port 51b can directly flow to the spark plug 6 At 3, the cooling water flowing to the base of the Mars 6a is guided and spaced by the second rib 45, respectively, flowing through the 2b b between the spark plug 6a and the drain 8, and the 8 1354729 third stream The road 4 2 c flows between the spark plug 6 a and the intake valve 7 , and the venturi effect generated by the second rib 4 5 and the valve wall, the spark plug 6 a, the intake The cooling effect of the valve 7 and the exhaust valve 8 has an additive effect, and then flows out from the cooling water outlet 4 » a; the third cooling water port 5 1 c flows into the cooling water of the cooling water passage 42 'Because it can be blocked by the first rib 44 and close to the intake valve 7, it is possible to directly cool the intake valve 7, and then the fourth flow passage 4 2 d from the cooling water outlet 4a Flow out. The effect of the present invention is that the first rib 44 and the second rib 4 5 are disposed on the cooling water passage 4 2 of the cylinder head 4, and the first rib 44 and the first rib 4 are provided by the first rib 44 and the first rib 4 5, the upper end and the lower end are respectively connected to the upper wall 4 21 and the lower wall 42 2 of the cooling water passage 4 2 , whereby the first rib 44 and the second rib 45 are available on the cooling water passage 4 2 Forming a reinforcing column to increase the knocking strength of the cylinder head 4, whereby the lower wall 4 2 2 of the cooling water passage 4 2 (ie, the upper side of the combustion chamber) can be implemented with a thinner wall, thereby further enhancing the cylinder The heat dissipation effect of the head 4. In addition, by the blocking of the first φ rib 44, it can ensure that the steaming plugs 6 & and the exhaust valve 8 of the local high temperature of the steam head 4 obtain more cooling water to perform the cooling action, thereby enabling the steam Red head 4 achieves the purpose of even cooling. Furthermore, by the Venturi effect generated by the arrangement of the second ribs 45, the heat dissipation effect at the spark plug 6a can be increased. Red, as described above, the present invention can effectively solve the shortcomings of the conventional steam head by using the above-mentioned water-cooled engine cylinder head structure, and effectively improve the cooling and anti-explosive strength of the cylinder head. The effect, the entrance-boat certificate and the 2 丨敬" ^ ^ extend the service life of the engine, has improved the power amplifier than the applicator, the page has the requirements of novelty and progressiveness, the application for invention according to law, 9 pray for expensive The trial committee - the female shell is slightly 'Hui gift, 'Simplified illustrations】 Patent trial, to the sense of virtue. Figure - is a three-dimensional exploded view of the familiar engine. Figure 2 is a schematic diagram of the body of the mystery and the local touch of the knot. Figure 2 is a schematic plan view of a partial section of the § Known head. Figure 4 is an exploded view of the engine of the present invention. Figure 5 is a partial cross-sectional view of the cylinder body and cylinder head of the present invention. Figure 6 is an embodiment of the invention. Figure 7 is an embodiment of the cooling water port of the present invention. [Main component symbol description] 1 engine 11 cylinder body 111 cooling water inlet 112 cooling water flow channel 12 cylinder head 121 intake passage 122 exhaust passage 12 3 cooling water outlet 12 4 cooling water passage 1 3 1 perforated 1 6 spark plug 1 8 Exhaust valve 3 2 cooling water flow channel 1 2 5 wall 1 3 gasket 1 4 piston 1 5 combustion chamber 1 7 intake valve 1 9 sprocket chamber 2 water-cooled engine 3 steam body 31 piston 1354729 4 cylinder head 5 gasket 3 3 cooling water inlet 3 a axis 4 1 combustion chamber 4 2 cooling water channel 4 2 1 upper wall 4 2 2 lower wall 4 2 a first flow channel 4 2 b second flow channel 4 2 c third flow channel 4 2 d Fourth flow passage 4 3 sand release hole 4 31 closing member 4 4 first rib 4 41 turning portion 4 4 2 slow flow port 4 5 second rib 4 a cooling water outlet 51 cooling water port • 6 spark plug 7 Intake valve 8 exhaust valve 9 sprocket chamber 51 a first cooling water port 51b second cooling water port 51c third cooling water port 6 a Mars plug 9 a inner side wall 11