Do You Need to Keep Pressing the Accelerator to Maintain a Constant Speed?

[LeBryce]

When driving, you need to press the accelerator continuously for acceleration and maintaining speed because only by pressing the accelerator can the engine reach the required RPM for driving, allowing the car to move at a certain speed. Once the desired speed is achieved and you want to maintain a constant speed, you simply need to keep the pressure on the accelerator steady. Cruise Control: Nowadays, many mid-to-high-end cars come with cruise control, which is typically used on highways. By pressing a button, you can set a constant speed. Once the speed is set, you can move your foot from the accelerator pedal to the brake pedal. Pressing the brake will cancel the cruise control. This makes driving less tiring, but cruise control is only suitable for roads with good conditions where a constant speed can be maintained. Precautions: The accelerator is usually pressed when upshifting to increase the vehicle's RPM. Reaching the specified RPM makes shifting gears smoother, preventing stalling or strange noises. When starting, the clutch and accelerator can be pressed simultaneously, but during gear shifts, pressing both at the same time is generally not recommended as it can cause unstable driving.

[SanPeter]

Actually, you need to keep pressing the accelerator pedal when driving at a constant speed, but the pressure must be controlled steadily. I often experience this on the highway—your right foot needs to be as gentle as stepping on an egg; if you ease up even slightly, the speed drops. If you encounter an uphill slope, you have to add a bit more throttle in advance, otherwise the engine will start roaring. However, many cars nowadays come with cruise control—just press a button, and the speed is maintained automatically, giving your right foot a break. But a reminder: in busy urban areas, it's safer to control the speed yourself, as relying too much on cruise control can be distracting.

[DiWeston]

Indeed, you need to continuously apply throttle to maintain a steady speed, just like pedaling a bicycle. Last time on a long-distance drive, I tried keeping the throttle at a certain position without moving it, and the car maintained 80 km/h on a flat road. However, when encountering wind or uneven road surfaces, it's hard to say—when wind resistance is high, you can clearly feel the speed dropping, requiring more effort. If the car had adaptive cruise control, it would be much more convenient—just set the speed and you don't even need to worry about braking. I recommend opting for this feature when buying a new car; it's especially practical for those who frequently drive on highways.

[DeZoey]

From my experience, maintaining a constant speed mainly relies on throttle depth control. The engine's output power must balance with the driving resistance, and releasing the throttle means deceleration. However, new energy vehicles nowadays have a characteristic: when you release the throttle, the energy recovery system will intervene, maintaining the speed for 2-3 seconds without deceleration. But eventually, you'll have to press it back. To save effort, manual transmission cars can shift to a higher gear, so at the same speed, the throttle is pressed more lightly. For automatic transmission cars, just keep pressing unless they have cruise control.

[Carrie]

It depends on road conditions. On flat highways, maintaining steady throttle does keep constant speed – I've tested holding 80km/h with the tachometer rock steady. But hilly sections are tricky: you must ease off throttle or even brake slightly downhill, while pressing deeper uphill. Modified car enthusiasts mention that ECU-tuned vehicles have more linear throttle response, making speed control easier. Regular drivers should just keep adjusting pedal pressure, and remember to check the throttle body periodically – carbon buildup affects throttle sensitivity.

[LaGriffin]

From a physics perspective, maintaining constant speed requires continuous throttle input to counteract resistance. But there are practical techniques: find that 'sweet spot' position where you just rest your foot lightly. When teaching my wife to drive, I emphasized keeping the right heel stationary and making only ankle micro-adjustments. Also, tire pressure is crucial - insufficient pressure increases rolling resistance, requiring deeper throttle input. I recommend checking tire pressure monthly for both fuel efficiency and speed control. If it feels too tiring, installing cruise control is an option - just around a thousand bucks.