A cooling apparatus of an engine includes a cooling fan, a fan housing, and a shroud guiding cooling air from the fan housing to the outer circumferential surface of an engine body portion. Further, a cooling air passage passing throughout in a cylinder head from one side surface of the cylinder hea
A cooling apparatus of an engine includes a cooling fan, a fan housing, and a shroud guiding cooling air from the fan housing to the outer circumferential surface of an engine body portion. Further, a cooling air passage passing throughout in a cylinder head from one side surface of the cylinder head to the other side surface thereof is formed in the cylinder head, and a narrowed or throttle guide portion which guides the cooling air from the interior of the fan housing to an inlet opening of the one side surface of the cooling air passage is formed in the shroud.
대표청구항▼
1. A cooling apparatus of an engine, the cooling apparatus comprising: an engine body portion including a cylinder and a cylinder head connected to the cylinder, the cylinder head having a front surface, a right side surface, a rear surface, and a left side surface;a crankshaft extended in a right a
1. A cooling apparatus of an engine, the cooling apparatus comprising: an engine body portion including a cylinder and a cylinder head connected to the cylinder, the cylinder head having a front surface, a right side surface, a rear surface, and a left side surface;a crankshaft extended in a right and left direction;a cooling fan fixed to one end of the crankshaft;a fan housing surrounding the cooling fan;a shroud guiding cooling air discharged from an interior of the fan housing to an outer circumferential surface of the engine body portion;a cooling air passage formed in a cross-shape in the cylinder head and including a first cooling air passage and a second cooling air passage, the first cooling air passage and the second cooling air passage being included in a same plane that is orthogonal to a center line of the cylinder,wherein the first cooling air passage has an inlet opening in the front surface of the cylinder head; anda narrowed guide portion formed in the shroud, the narrowed guide portion guiding the cooling air to the inlet opening of the first cooling air passage,wherein the second cooling air passage is parallel to the crank shaft and extends from the right side surface to the left side surface of the cylinder head, and the first cooling air passage is orthogonal to the second cooling air passage,wherein the first cooling air passage is orthogonal to the second cooling air passage and the center line of the cylinder, and the first cooling passage extends from the front surface to the rear surface of the cylinder head, andwherein the shroud and the narrowed guide portion guide the cooling air generated in the interior of the fan housing located at a right side or a left side of the engine body portion to the inlet opening of the first cooling passage so as to allow the cooling air to flow in a front-rear direction in the first cooling air passage. 2. The cooling apparatus of claim 1, wherein each of the left surface, the right surface, and the rear surface includes an outlet opening, and wherein the cooling fan and the shroud including the narrowed guide portion are configured to force cooling air into the inlet opening such that the cooling air exits each of the outlet openings. 3. The cooling apparatus of claim 1, wherein the cylinder head includes an exhaust passage defined by a forming wall, and an outer surface of the forming wall forms a portion of the cooling air passage. 4. The cooling apparatus of claim 1, wherein the cylinder head includes an exhaust passage defined by a forming wall, and the cooling air passage passes near the forming wall. 5. The cooling apparatus of claim 1, wherein the cooling air passage supplies the cooling air flowing through the cooling air passage to an ignition plug. 6. The cooling apparatus of claim 1, wherein the cylinder head further comprises two pushrod insertion holes and an exhaust passage, andwherein the first cooling air passage passes between the pushrod insertion holes, and the second cooling air passage passes between one of the pushrod insertion holes and the exhaust passage.
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이 특허에 인용된 특허 (1)
Hudson Eric B. (Hilbert WI), Cam pulley and cylinder head arrangement for an overhead cam engine.
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