Patent ID: 6672283
Filing Date: 2004-01-06
Classification: F01L,F02B,F02D,F02M,Y02T

Abstract:
An internal combustion engine for a marine drive comprising an engine body, a member movable relative to the engine body, the engine body and the member together defining a variable-volume combustion chamber, an air induction device being arranged to introduce air to the combustion chamber, the air induction device comprising an intake port that provides a connection between the air induction device and the combustion chamber, an intake valve movable relative to the intake port between an open position and closed position such that the intake valve can selectively inhibit air flow into the combustion chamber, a valve actuator rotatably journaled relative to the engine body, the valve actuator moving the intake valve at a preset angular position of the valve actuator, a valve actuator driving arrangement being adjustably connected to the valve actuator such that the preset angular position can be advanced or delayed through movement relative to the valve actuator driving arrangement, a setting mechanism being interposed between the valve actuator driving arrangement and the valve actuator, the setting mechanism arranged to adjust the preset angular position of the valve actuator relative to the valve actuator driving arrangement, the setting mechanism capable of adjusting the valve actuator between a first limit angular position and a second limit angular position, the first limit angular position being advanced relative to the second limit angular position, a sensor arranged to sense an amount of the air within the induction device, and a control system adapted to control the setting mechanism based upon the signal of the sensor, the control system adapted to control the setting mechanism to set the valve actuator to an adjusted angular position that is advanced relative to a current angular position when the signal indicates that the amount of the air increases and a change rate of the amount is greater than a preset change rate.