Renault Explains F1 Engine Throttles

This article was is re-produced from F1Technical.net in its entirety . It is an excerpt from Renault F1 Q&A. Enjoy. A throttle has come to be associated with any part that controls the power of an engine – such as the accelerator pedal – but in actual fact it is a hydraulically operated mechanism used to increase or decrease inlet gases to the engine. In a V8 there are eight throttles on the top of the engine unit that control the amount of air that enters each of the engine cylinders from the airbox. When the throttles are open, air enters the engine unit. Fuel will be injected just before the inlet valve and hence the combustion chamber, and the spark plug will ignite the fuel and oxygen content in the air. The throttle therefore dictates the amount of fuel burned on each cycle to produce efficient power. When the throttle is closed, no air enters the engine and the combustion process is temporarily suspended. All the throttle valves are controlled via the accelerator ped...