lean air-fuel mixture

A lean air-fuel mixture refers to a combustion condition in an internal combustion engine where the ratio of air to fuel is higher than the stoichiometric ideal. This means there is more air and less fuel in the mixture, resulting in more efficient fuel usage and reduced emissions. However, running too lean can cause engine knocking, overheating, and potential damage due to higher combustion temperatures. Understanding and optimizing lean air-fuel mixtures is essential for improving engine performance, fuel economy, and meeting environmental regulations.