Patent ID: 6320285
Filing Date: 2001-11-20
Classification: F02D,H02K

Abstract:
A throttle valve control apparatus comprising:a throttle valve;a DC torque motor for driving the throttle valve, the DC torque motor including a stator with a coil wound therearound, and a needle including permanent magnets, the needle being rocked within a predetermined working angle range, wherein a magnetic path is formed within the stator, and a magnetic flux quantity is generated within the stator by the permanent magnets and by the coil when current flows in the coil, wherein the sum of the magnetic flux quantities caused by the permanent magnets and the coil is not saturated while a working angle of the needle is in a repulsion region where the needle repulses the stator and magnetic flux is saturated while the working angle of the needle is in an attraction region where the needle is attracted to the stator;throttle opening sensor for outputting information regarding an opening of the throttle valve; anda controller which controls the DC torque motor when receiving signals from the throttle opening sensor.