| 摘要 |
A valve system (A) for controlling the opening and closing of the intake and exhaust ports (16, 18) of the internal combustion engine's cylinders (C) consists of a shutter valve assembly (B) which opens and closes a row of openings registering with the engine's combustion chamber. The shutter assembly includes a movable shutter ring (28) having a plurality of shutter openings (22, 24) which either register with the intake ports during the intake cycle of the internal combustion engine or with the exhaust ports during the exhaust cycle of the internal combustion engine. A controller (E) regulates the rotation of the shutter ring so that the appropriate ports are in communication with the cylinder for proper intake of fluid and air and the exhaust of fumes from the combustion. An engine management computer (76) determines the precise opening and closing time of the intake and exhaust ports and initiates an electrical signal for commanding the controller to move the shutter ring to the appropriate position, thereby either closing or opening the intake and exhaust ports.
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