Does Engine Speed Affect Fuel Consumption?

[VanThomas]

Engine speed and fuel consumption are not directly proportional, and they do not influence each other. Each engine has its most economical and fuel-efficient operating range. Only when the engine speed remains within this range does it achieve higher fuel efficiency. Both excessively low and high speeds are not fuel-efficient driving methods. Fuel consumption refers to the amount of fuel consumed per 100 kilometers. It depends not only on the work done by the engine but also on the distance traveled by the car. The longer the distance traveled, the higher the fuel consumption naturally becomes. Engine speed is determined by the engine's power and the number of gears in the transmission. For vehicles with more gears, the efficiency of power delivery is also higher. The higher the crankshaft speed of the engine, the greater the power output. Power represents the work done per unit of time, which is related to time but not distance. Engine speed refers to the power output at a specific moment, not the work done over a period of time. Therefore, the relationship between engine speed and fuel consumption is not a direct proportional one.