A throttle controller is a process responsible for regulating the rate at which application processing is conducted, either statically or dynamically. A pedal position sensor is connected to the vehicle accelerator pedal that sends signals to the ECU of the vehicle which controls the throttle valve. A throttle controller then is a device that reduces the response time from the accelerator pedal to the engine through electrical signals. These signals increase response time as you depress the gas pedal which results in an increased speed. That means that when you step on your car's gas pedal, instead of opening the throttle, you're activating an accelerator pedal module, which converts the pressure you put on the pedal into an electric signal. That signal is then sent to an electronic control unit, which takes your inputs into account, as well as outside variables, to open the throttle for optimum efficiency and performance.