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发明授权
US5456225A Valve operating device for internal combustion engine 失效
内燃机用阀门操作装置

Valve operating device for internal combustion engine
摘要：
A valve operating device for use in an internal combustion engine for varying operating characteristics of a pair of engine valves (20) in multi-stages depending upon operating conditions of the engine. A cam shaft (31) is provided with a high-speed cam (32), a pair of medium-speed cams disposed on opposite sides of the high-speed cam (32), and a pair of low-speed cams (34) disposed between the medium-speed cams (33) and the high-speed cam (32). A rocker shaft (35) is provided with a first free rocker arm (36) in sliding contact with the high-speed cam (32), a pair of driving rocker arms (37) operatively connected to the pair of engine valves (20), respectively, and in sliding contact with the low-speed cams (34), and a pair of second free rocker arms (38) disposed with the driving rocker arms (37) interposed between the second free rocker arms (38) and the first free rocker arm (36) to be in sliding contact with the medium-speed cams (33). First and second connection switching means (39, 40) are provided and separately switchable between states for selectively connecting the various rocker arms for operating the driving rocker arms (37) and engine valves (20) in low-speed, medium-speed and high-speed operating ranges of the engine.
摘要（中）：

一种用于内燃机的阀操作装置，用于根据发动机的操作条件多级地改变一对发动机气门（20）的工作特性。 凸轮轴（31）设置有高速凸轮（32），设置在高速凸轮（32）的相对侧上的一对中速凸轮和一对低速凸轮（34）， 设置在中速凸轮（33）和高速凸轮（32）之间。 摇臂轴（35）设置有与高速凸轮（32）滑动接触的第一自由摇臂（36），与所述一对发动机气门（20）可操作地连接的一对驱动摇臂（37） 和与低速凸轮（34）滑动接触的一对第二自由摇臂（38），其中驱动摇臂（37）设置在第二自由摇臂（38）和第一自由摇臂 自由摇臂（36）与中速凸轮（33）滑动接触。 提供第一和第二连接切换装置（39,40），并且可以在状态之间单独地切换，以选择性地连接用于以低速，中速和高速操作驱动摇臂（37）和发动机气门（20）的各种摇臂 - 发动机的速度工作范围。

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