Idle speed control valve is controlled by the ignition switch power supply, as long as the ignition switch to the ON position, idle speed control valve is energized, the engine computer to control its circuit Ground. When the engine operating parameters deviate from normal, they use the valve to adjust the idle speed. Idle speed by controlling air bypass the throttle body to adjust. After engine start, idle speed control valve on the feed rate increases over time, the engine idle speed increase of about 150r/min-300r/min. When the engine coolant temperature is low, the idle speed control valve is open, to get the proper fast idle. Depending on the engine computer coolant temperature, idle speed control valve by changing the transmitted signal strength to control the idle speed control valve plunger position. Stepper motor type idle control valve is the world's most widely used as a current idle speed control device. EFI systems for automotive air bypass channel opening, thereby regulating bypass gas, the engine speed to reach the required target. Structural principle: permanent magnets in the rotor, stator excitation coil form and the rotary motion into linear motion of the feed screw and valve components. It uses the system to convert the signal supply control step, the rotor can forward and also can be reversed so that the valve (screw ) To adjust the telescopic movement pass in order to achieve the purpose of air cross-section, so as to stabilize idle speed, and achieve the desired idle speed. |
