What is an electronically controlled throttle system in an automobile?

Electronic throttle control system-intelligent.

Working principle: the amount of the accelerator pedal is transmitted to the accelerator pedal position sensor of the accelerator lever, and the engine electronic control unit sends an instruction to drive the accelerator through the motor to control the throttle opening.

The advantage of controlling throttle opening and ignition timing is that it can reduce the impact during acceleration and deceleration; The shift impact can be reduced when shifting gears, and the ride comfort can be achieved through the comprehensive control of the power train. In addition, in the snow mode (snow driving mode), the throttle opening characteristics related to the accelerator pedal opening are specified to ensure the stability of the vehicle on the wet road.

When VSC (Vehicle Stability Control System) works, it can also control the engine power at the same time to ensure the stability of the vehicle and realize the coordinated control of the vehicle stability control system and the automatic transmission (snow driving mode).

The driver's will (accelerator pedal depression) is detected by the accelerator pedal position sensor with built-in accelerator lever. Throttle opening is matched with various control signals such as EFI, ECT and VSC. The engine ECU determines the appropriate throttle opening, and then the throttle actuator opens or closes the throttle.

The throttle opening is fed back to the engine ECU through the throttle position sensor. The accelerator pedal position sensor and the accelerator position sensor are equipped with main and auxiliary systems, so when the system fails, it can still maintain the function of continuous monitoring to ensure safe operation.