What is the fuel throttle?

You know how when you press on the gas pedal the car goes faster? The throttle is the part of the engine assembly that opens to let more air into the engine and simultaneously sends in more fuel, thereby making the engine put out more power, making the wheels go faster. On injected vehicles an air valve assembly is connected to the throttle mechanism to allow more air when the gas pedal is pushed. At the same time, a throttle position sensor determines how much you have pressed the pedal and the computer, sensing the positon change, causes the injectors to deliver the appropriate amount of fuel into the throttle-body or manifold (depending on the type of injection system).