Patent ID: 6595184
Filing Date: 2003-07-22
Classification: F02D,Y02T

Abstract:
An intake control system of a multi-cylinder internal combustion engine, the intake control system comprising:a plurality of intake control valves disposed in intake passages of the respective cylinders of the engine; a plurality of rotary solenoid actuators, wherein each rotary solenoid actuator holds the intake control valve at a neutral position where the intake passage is half-opened when the rotary solenoid actuator is not energized and drives the intake control valve open or close in accordance with a direction of energization when the rotary solenoid actuator is energized; a plurality of opening degree sensors for detecting opening degrees of the respective intake control valves; a crank angle sensor for detecting rotation speed of the engine; and a controller that regulates the opening degree of each intake control valve by driving each rotary solenoid actuator based on signals inputted from the opening degree sensors and the crank angle sensor in order to converge the rotation speed of the engine to a lower limit rotation speed above which the engine is operable during an idling operation of the engine.