Eine Ventilbetätigungsvorrichtung für Brennkraftmaschine mit zwei obenliegenden Nockenwellen

• Main Author: NAKAGOMI, AKIRA
• Format: Patent
• Language: German
• Published: 11.10.2001
• 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

A valve operating apparatus for DOHC engine allowing to improve the fuel consumption, in DOHC engines, is provided with by reducing the weight of the shaft system of valve operating mechanism and lowering the driving force for the dynamic valve and, at the same time, permitting to improve the durability and the silence of the transmission system and, moreover, assuring a good combustion even for engines having smaller bore diameter. A first and a second cam shafts (1,2) for opening/closing the intake/exhaust valve are arranged side by side on a cylinder head, a first transmission means (4) is disposed at a shaft end of the first cam shaft (1) positioned at one face side of the engine and, at the same time, shaft ends of the first and second cam shafts (1,2) located at the other face side of the engine are linked for the transmission of the driving power by a second transmission means (5). And the driving power from a crank shaft is transmitted to the first transmission means (4), and moreover, the shaft diameter of the second cam shaft (2) is formed smaller than that of the first cam shaft (1).