What is the speed when not pressing the accelerator?
3 Answers
Starting in first gear without pressing the accelerator results in a speed of around 8. Starting in second gear without pressing the accelerator yields a speed of approximately 10-11. Starting in third gear without pressing the accelerator achieves a speed of 19-20. Vehicle speed is an important indicator for measuring automobile performance. Vehicle Speed: Vehicle speed refers to the distance a vehicle travels per unit of time, commonly referred to as speed, with standard units being kilometers per hour or meters per second. Vehicle speed is one of the three parameters used to describe traffic flow and holds significant importance in traffic flow theory research. Automobile Accelerator: The accelerator, also known as the "throttle" or "gas pedal," is the control device that regulates engine power (thrust).
The speed when not pressing the accelerator isn't a fixed number—it's influenced by various factors. From my years of driving experience, if you suddenly release the accelerator while cruising steadily on flat ground, the car will gradually decelerate. For instance, when I'm driving at 100 km/h on the highway and let go of the accelerator, the speed might drop by 10-20 km per minute, eventually reaching idle speed (around 5-10 km/h) or coming to a complete stop. Road conditions play a significant role: deceleration is faster uphill, while the car may even accelerate downhill. Heavier vehicles or those with high wind resistance will slow down more gradually. Automatic transmission cars often exhibit idle creep, allowing them to move slowly on their own, whereas manual transmission cars might stall if the accelerator is released. Safety first—speed can be unpredictable when off the throttle, so keep an eye on the dashboard and the distance to the car ahead, using the brake to help stabilize speed and avoid accidents.
I commute with an automatic car, and during daily driving, the speed changes noticeably without pressing the accelerator. In city traffic jams, when I release the accelerator, the speed drops from 40-50 km/h to a crawling idle state (about 5 km/h), and it almost comes to a complete stop before red lights. The automatic transmission allows the car to move forward in small steps at low speeds, saving effort on the pedals; manual cars require more caution, as releasing the accelerator too quickly or on an uphill slope can easily stall the engine. Weather and road conditions are crucial: rain causes faster deceleration, while downhill slopes may lead to coasting acceleration. I prefer not to rely solely on the accelerator for deceleration, always being ready to control the speed with the brakes. This helps maintain a safe following distance, especially during peak hours, reducing the risk of rear-end collisions or sudden stops.
