Throttle Body Unit

Throttle Body Assembly:

Throttle Body Unit
The throttle Body assembly is a downdraft design. The throttle Body is mounted on the intake manifold plenum. The VCM uses the throttle Body in order to control the air flow into the engine, thereby, controlling the engine output.

The throttle valve within the throttle Body is opened by the driver through the accelerator controls. During the engine idle, the throttle valve is almost closed, and the Idle Air Control (IAC) valve handles the air flow control.

The throttle Body also provides the location for mounting the Throttle Position (TP) sensor. The throttle Body also senses changes in the engine vacuum due to the throttle valve position. The vacuum ports are located at, above, or below the throttle valve in order to generate the vacuum signals that are needed by the various components.