Air-Fuel Ratio

The air-fuel ratio (AFR) is the ratio of air to fuel in an engine's combustion mixture. It’s crucial for efficient and clean engine operation. A proper AFR ensures complete combustion, maximizing power and fuel economy while reducing emissions. If there's too much air (lean mixture), the engine may run cooler and less efficiently; too much fuel (rich mixture) can cause engine problems and pollution. Modern vehicles use sensors to continuously monitor and adjust AFR for optimal performance, typically aiming for a ratio around 14.7:1 for gasoline engines, meaning 14.7 parts air to 1 part fuel.