Does the engine’s efficiency typically increase with a correct fuel/air ratio?

The engine’s efficiency is greatly influenced by the fuel/air ratio, which is the proportion of fuel to air in the combustion process. When the correct fuel/air ratio is maintained, combustion occurs more completely, maximizing the energy extracted from the fuel. This efficient combustion leads to a higher thermal efficiency, causing the engine to produce more power with less fuel consumption.

In contrast, an improper fuel/air mixture can lead to incomplete combustion. A mixture that is too rich (excess fuel) or too lean (insufficient fuel) does not burn optimally, resulting in wasted fuel and decreased efficiency. Therefore, the correct fuel/air ratio is vital for achieving the best performance from an engine.

While modern engines may employ advanced technology to optimize fuel/air ratios and thus enhance efficiency, the fundamental principle remains that a correct ratio improves efficiency, making the response affirmatively true for all engines.