How to solve the problem when the idle speed is too high?

In order to avoid the sudden increase of the accessory resistance torque driven by the engine when the engine is idling, and the engine is idling or flameout, a control signal is output when the electrical signal related to the increase of the accessory resistance torque is received, and the idle intake air volume is adjusted in advance through the idle control actuator. When the idle speed control system is running at high speed, it not only uses the engine speed sensor, throttle position sensor, speed sensor and engine coolant temperature sensor to obtain the information of engine speed, idle condition and engine temperature, but also provides the information of whether to use the automobile air conditioner. After the switch is turned on, high-speed rotation control will be carried out, so that the engine has appropriate power output and the air-conditioning compressor can operate normally. The battery voltage provides information about whether the battery charge is low and whether the battery load is high.

After the gear is installed, high-speed idle control will be carried out to prevent the resistance from increasing after the automatic gear pump cuts off the driving gear, which will lead to the decrease of engine speed. Provide electric load increase letters to idle control systems such as taillight relay or rear window fog relay, judge the increase of electric load according to the connection signals of these electrical relays, and carry out high-speed idle control to prevent the engine speed from decreasing due to the increase of generator load. When the engine starts, adjust the idle speed control valve to the maximum position to facilitate the engine starting. After starting, according to the engine speed and temperature signals, the opening of the idle control valve gradually decreases. When the engine is idling, the engine speed sensor provides a speed signal.

An ignition switch that provides an engine start signal and a rear start signal. Control of idle speed control valve during operation of activated carbon canister solenoid valve. In some cars, the idle speed control system adjusts the ventilation of the idle channel according to the opening of the movable cartridge valve to prevent the engine from idling. In addition to the throttle position sensor used to judge the idle state, the engine speed sensor is also used to provide the engine speed signal in the idle state. The solenoid valve of the movable cartridge valve provides the opening signal of the solenoid valve of the movable cartridge valve. After the movable plug-in solenoid valve is opened, the opening of the idle speed control valve is controlled to stabilize the idle speed. If the power is lost or the load is high, the high-speed idle operation control will be carried out to make the generator charge the battery at idle speed.

Idle speed deviation correction control, that is, learning correction control of idle speed control system. Due to external reasons such as the aging of engine parts, if the engine idle speed deviates from the original set value, controlling the idle speed control valve will control the preset opening and correct the engine idle speed to the set value. Idle speed control system component structure, DC motor. The rotation of the power part of the idle speed control actuator is controlled by the driving circuit. Convert the rotary motion of the transmission into the linear motion of the throttle control arm limiter. When the idle speed adjustment control signal is output, the motor power supply is turned on through the driving circuit, and the angle corresponding to the control signal pulse is rotated. After passing through the transmission mechanism, the throttle control arm moves to the limit and the throttle opening changes at idle speed.