Adjustment principle of idle speed adjustment screw of cable accelerator

Throttle can be divided into two categories, one is the traditional cable throttle, the other is the electronic throttle, and their working principles are different. The traditional engine throttle control mechanism works through a cable (soft steel wire) or a pull rod, one end of which is connected with the throttle pedal and the other end is connected with the throttle linkage plate. However, this kind of throttle has gradually faded out of people's sight. For example, most throttles are electronic throttles. The electronic throttle mainly uses the throttle position sensor to control the throttle opening according to the energy required by the engine, so as to adjust the intake air.

When the driver operates the accelerator pedal, the accelerator pedal position sensor generates a corresponding voltage signal and inputs it into the throttle control unit. The control unit first filters the input signal to eliminate the influence of environmental noise, and then analyzes the driver's intention according to the current working mode, pedal movement and change rate, calculates the basic demand for engine torque, and obtains the basic expected value of the corresponding throttle opening.

Then it communicates with the vehicle control unit through CAN bus to obtain other working conditions information and various sensor signals, such as engine speed, gear position, throttle position, air conditioning energy consumption, etc. So as to calculate the total torque required by the vehicle. By compensating the expected throttle angle, the optimal throttle opening is obtained, and the corresponding voltage signal is sent to the drive circuit module to drive the control motor to make the throttle reach the optimal opening position.