What are the advantages and disadvantages of electronic throttle?

Advantages and disadvantages of electronic throttle are as follows: 1, advantages: (1) output: it can achieve the best torque output of the engine in a full range. (2) Accurately control the throttle opening. (3) Improve emission performance: ETC system accurately controls the air-fuel ratio under various working conditions to make the combustion more complete. (4) Higher driving reliability: Redundancy design can make two sensors detect each other, and when one sensor fails, it can be identified in time, which greatly increases the reliability of the system and ensures the driving safety. (5) Multi-choice working modes: The driver can choose different working modes through the mode switch according to different driving needs. There are usually three different modes: normal mode, power mode and snow mode, and the response speed of throttle to accelerator pedal is different. (6) Obtaining altitude compensation: In higher altitude areas, the atmospheric pressure drops, and the oxygen-poor content in the air drops, resulting in a decrease in engine output power. At this time, the electronic throttle control system can compensate the throttle opening according to the functional relationship between atmospheric pressure and altitude, so as to ensure that the relationship between engine output power and accelerator pedal position remains stable. 2. Disadvantages: (1) Delayed throttle start: rich mixture is required for automatic start, and ECU will analyze the current vehicle speed and throttle opening to limit the throttle opening range and fuel injection system from the perspective of fuel economy and reasonable emission. (2) There are many influencing factors: in addition to spring nonlinearity, stick-slip friction and backlash nonlinearity, it is also influenced by the nonlinear damping force generated by the intake air flow and the resistance moment of the spoiler with unstable intake air flow, which leads to that the conventional PID control cannot accurately set the feedback gain and affects the control accuracy. (3) High cost: ETC system adopts intelligent sensor, quick response actuator, high performance control unit and redundant design, which greatly increases the cost. At present, ETC system is only assembled on high-end cars.