The material code you provided, 1020004684, corresponds to a specific component found in the concrete line pump and concrete trailer pump manufactured by Zoomlion Heavy Industry and Sany Heavy Industry, respectively. The model number associated with this component is 57EA41-2.7-009, which refers to the throttle stepper motor.

The throttle stepper motor serves a vital function in controlling the throttle or engine speed of the concrete line pump or concrete trailer pump. Its primary role is to regulate the fuel intake to the engine, thereby controlling the power output and the speed of the pump.

The throttle stepper motor operates based on stepper motor technology, which allows for precise control of the throttle position in small increments or steps. It receives signals from the pump's control system, which determines the desired throttle position based on the operational requirements.

By adjusting the throttle position, the stepper motor effectively controls the engine speed, which directly impacts the pump's output flow rate and pressure. It enables operators to regulate the concrete pumping process according to the specific needs of the job, such as adjusting the flow rate for different types of concrete or controlling the pressure during pumping.

The stepper motor's precise control over the throttle position also contributes to the overall efficiency and fuel economy of the concrete pump. By optimizing the engine speed and power output, it helps to ensure that the pump operates at the most efficient levels, minimizing fuel consumption and reducing unnecessary wear on the engine.