What is the optimal engine speed?
2 Answers
During normal driving, the optimal engine speed for most fuel-injected vehicles is generally around 2200-2500 RPM. Here are some additional details: 1. Fuel efficiency: Regardless of the gear, maintaining engine speed at around 2200-2500 RPM is most fuel-efficient. 2. Principle of fuel efficiency: The economical speed range for most vehicles is between 60-90 km/h, which is the most fuel-efficient speed range. Both excessively high and low speeds are detrimental to fuel efficiency. At low speeds, the piston movement speed is reduced, leading to incomplete combustion. At high speeds, increased air intake velocity results in greater intake resistance. 3. Gear shifting: When shifting gears, slightly increase the throttle compared to normal driving to raise the engine speed to slightly above 2500 RPM. If shifting below 2000 RPM, the speed will drop after shifting, creating a sensation of gear disengagement and requiring additional throttle to compensate, which actually consumes more fuel.
As a commuter driving to work every day, I find that the most comfortable engine speed range is between 1500 and 2500 RPM. This ensures smooth driving and fuel efficiency, with manageable fuel consumption that's easy on the mind. In city traffic with frequent stops and starts, the engine speed naturally stays around 2000 RPM, while cruising on the highway at 1800 RPM proves more economical. The engine doesn't get overworked, noise levels remain low, making it ideal for family cars. Remember not to stomp on the accelerator too hard—otherwise, the RPM will spike and fuel costs will climb rapidly. Just keep the needle on the dashboard in the mid-to-low range.
