Key Components of a Throttle Body:
Throttle Plate (Butterfly Valve): The primary moving component inside the throttle body. It's a flat, round valve that rotates on a shaft. When the throttle plate opens, more air flows into the engine; when it closes, air flow is restricted.

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 the air-fuel mixture, ignition timing, and other parameters to optimize engine performance.

Idle Air Control Valve (IACV): In vehicles with older throttle bodies, the IACV is responsible for controlling the engine's idle speed by allowing a small amount of air to bypass the throttle plate when it is closed. In modern vehicles with electronic throttle control, the ECU directly controls the throttle plate's position to manage idle speed.

Actuator: In electronic throttle bodies (also known as drive-by-wire systems), an electric motor or actuator moves the throttle plate based on signals from the ECU. This replaces the traditional mechanical linkages used in cable-operated throttle bodies.

The throttle body is a critical component of a vehicle's air intake system that regulates the amount of air entering the engine. This air is then mixed with fuel and ignited to produce power. The throttle body is typically located between the air filter and the intake manifold, and it plays a key role in controlling the engine's power output and overall performance.