Patent ID: 6622695
Filing Date: 2003-09-23
Classification: F02B,F02D,Y02T

Abstract:
An intake control system that is mounted in an internal combustion engine and controls quantity of intake air, the intake control system comprising:an intake control valve disposed in an intake passage of each cylinder of the engine; a rotary solenoid actuator that drives the intake control valve to open and to close in a direction corresponding to a direction of current supplied to the rotary solenoid actuator when the rotary solenoid actuator is supplied with the current; and a spring that is connected with a shaft of the intake control valve or a rotor of the rotary solenoid actuator and holds the intake control valve at a neutral position in which the intake passage is half opened when the rotary solenoid actuator is not supplied with the current, wherein the rotary solenoid actuator is constructed with a rotor made of a ferromagnetic material and a stator that is made of a ferromagnetic material and is disposed with a plurality of electromagnetic coils, wherein the rotor and the stator are disposed so that air gaps formed between the rotor and the stator change length thereof in a rotational direction of the rotor, and wherein the plurality of electromagnetic coils are disposed so that magnetic flux is generated mainly through the air gap formed from the rotor to a direction in which the rotor is to be rotated among the air gaps.