Patent ID: 6247447
Filing Date: 2001-06-19
Classification: F02D

Abstract:
In a throttle valve controller for an internal combustion engine comprising first driving means for driving a throttle valve only in a predetermined throttle opening range, and second driving means for driving said throttle valve against a spring by using a throttle wire,the improvement wherein said first driving means is an electromagnetic actuator wherein a rotatable rotor and at least one magnetomotive force source are integrally incorporated through a magnetic path, said rotor being provided on a peripheral edge thereof with an integral magnet magnetized with a north pole and a south pole or separate magnets magnetized in opposite directions to have a north pole and a south pole, respectively, wherein three pole pieces are provided on a peripheral edge of an opening in which said rotor is provided, and two connecting magnetic paths are provided to connect pole pieces opposite to each other in polarity produced by said at least one magnetomotive force source, andsaid second driving means limits said predetermined throttle opening range, in which said throttle valve is driven by said first driving means, to a small throttle opening range in which idle speed control can be effected.