With a drive-by-wire throttle system, there is direct physical connection between the accelerator pedal and the throttle body.

Drive-By-Wire Throttle

An electronic throttle control system that uses electronic signals to control the throttle opening instead of mechanical linkage.

Accelerator Pedal

A pedal in a vehicle that controls the amount of fuel or power sent to the engine, regulating speed.

Throttle Body

A component in the air intake system of an internal combustion engine that controls the amount of air flowing into the engine, in response to the driver's accelerator pedal input.