A throttle is a device that controls the flow of fuel or air into an engine, regulating its power and speed. In vehicles, it is often connected to the accelerator pedal, allowing the driver to increase or decrease the engine's output. This control is essential for smooth acceleration and deceleration. In modern vehicles, throttles can be mechanical or electronic. Electronic throttles, known as drive-by-wire systems, use sensors and actuators to manage engine performance more precisely. This technology enhances fuel efficiency and reduces emissions, contributing to better overall vehicle performance and environmental impact.