What is a throttle body?

A throttle body is a critical component of an internal combustion engine that controls the amount of air entering the engine. It's typically located between the air filter box and the intake manifold.

• Function: The primary function of the throttle%20body is to regulate airflow. This airflow, in turn, affects the engine's power output and speed. The driver controls the throttle body's opening via the accelerator pedal.

• Components: A typical throttle body includes:

  • Throttle Plate (Valve): A rotating disc that opens and closes to control airflow.
  • Throttle Position Sensor (TPS): This sensor monitors the position of the throttle plate and sends this information to the engine control unit (ECU). The ECU uses this data to adjust fuel injection and ignition timing. Learn more about throttle%20position%20sensor.
  • Idle Air Control (IAC) Valve: This valve allows a small amount of air to bypass the throttle plate when it's closed, ensuring the engine idles smoothly. Sometimes, this function is integrated electronically. Find out more about idle%20air%20control%20valve.
  • Throttle Body Housing: The main structure that holds all the components.

• Types:

  • Mechanical Throttle Body: Uses a direct mechanical linkage (throttle cable) between the accelerator pedal and the throttle plate.
  • Electronic Throttle Body (Drive-by-Wire): Uses sensors and actuators to control the throttle plate based on the accelerator pedal position. This system offers more precise control and allows for features like traction control and cruise control.

• Maintenance: A dirty throttle body can cause problems like rough idling, poor acceleration, and decreased fuel economy. Regular cleaning with a throttle body cleaner can help prevent these issues. Throttle%20body%20cleaning is a common maintenance procedure.