Valve conduit of three-valve cylinder head for motorcycle

• Main Authors: XIHUAI YUAN, ZHONGZHU LI, QIU ZHOU
• Format: Patent
• Language: English
• Published: 23.03.2005
• Edition: 7
• Subjects: BLASTING; CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES; ENGINE PLANTS IN GENERAL; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; WEAPONS

The utility model relates to a valve conduit of three-valve cylinder head for motorcycle, in particular to the motorcycle engine. The present motorcycle engine cylinder head is pressed in the direct circular tube-shaped valve guide. The materials and the coefficient of thermal expansion of the cylinder head and the valve guide are different. The gap between them is increased to result into problems of the cylinder head sound and the oil leakage when the cylinder head is heated in working. According to the problems above, the valve conduit of three-valve cylinder head for motorcycle with a simple structure is provided to solve the problems of the sounding and the oil leakage due to the heat expansion. The technical proposal adopted is that the guiding pipe hole of the three-valve engine cylinder head 1 is provided with a valve guide 3; an O-shaped sealed ring 4 is provided between the lower end face of the ring disk on the center top part outer wall of the valve guide 3 and the ring on the upper end of the guiding pipe hole of the three-valve engine cylinder head 1.