Drive up to 120 at high speed, coast to 100, and then accelerate to 120, can you save fuel?Many drivers are particularly concerned about the fuel consumption of their cars and have been thinking about how to drive more fuel-efficient. Someone came up with the idea of saving fuel by relaxing the throttle when driving at a speed of 120 km/h, and then pressing the accelerator when the speed drops to 100 km/h, accelerating the car to 120 km/h, and then repeating this operation. So can this really save fuel? Theoretically, this method can indeed save fuel, but it requires a certain amount of driving skills to be able to translate theory into practical results.
The principle of this method is related to the load on the vehicle's engine. When the engine of the vehicle reaches a certain speed, say 2500 rpm, the load is relatively high. If the engine is continuously supplied with fuel at this time, the engine will always be under high load, and the natural energy consumption will be more. When the engine is under high load, reducing the amount of fuel supplied will reduce the load and thus the fuel consumption. It then accelerates, and so on, saving fuel by reducing the load during the deceleration phase.
Although the vehicle will increase fuel consumption during the acceleration phase, it is still fuel-efficient overall as long as the fuel consumption during the deceleration phase is higher than during the acceleration phase. This method of fuel economy only exists in theory, because it is not easy to keep the vehicle under load at optimal efficiency and needs to be had.
It takes five or six years of driving experience to be proficient.
This fuel-efficient trick requires superb right foot throttle control, colloquially known as the "** right foot". It's not easy to master this art. Without this technology, fuel savings may be compromised and may even lead to increased fuel consumption.
Without the right foot, it is difficult for the car to steadily reduce its speed to 100 kilometers per hour when decelerating, usually directly to 80 or 70 kilometers per hour. This results in a large speed difference between 80 km/h and 120 km/h, and relatively high fuel consumption during reacceleration, which offsets the fuel savings when decelerating.
In fact, even if you master the right foot, for private cars, the fuel saving effect is not very significant, perhaps only half a liter of fuel can be saved in a two-hour trip. The main ones who can really benefit from this trick are large truck drivers, who may be able to save two or three liters of gas in a two-hour trip. According to the calculation of 8 pieces of diesel 8 yuan a liter, it is equivalent to saving 26 per day4 yuan, nearly 800 yuan a month.
Compared to private cars, truck drivers have a more unique approach to fuel efficiency. Some drivers use the "hill slide" technique, which turns off the engine directly when the vehicle is going downhill, and the engine load drops to zero. However, this approach is extremely risky and can cause the vehicle to lose power and become unusable even with the steering wheel and brakes. Although the "Slippery Pie" can save fuel, it can endanger the life of the motorist in an emergency.
In fact, when driving a private car, it is quite dangerous to rely only on the so-called "**right foot". You know, on the highway, we have to keep a safe distance at all times, following the vehicles in front and behind and keeping a proper distance. After all, the speed of the car is always changing, and if the vehicles in front and behind are at a constant speed, then the distance between our car and other cars will also change all the time. If you are not careful, you can collide.
What's worse is that even if there is no accident, if the car in front of us keeps changing gears, it is likely that we will directly hit it. In addition, although this way of driving can save fuel, it is a waste of time. It may save half a liter of fuel, but it will take an extra half an hour to get to the destination. So, I'm not in favor of this so-called "right foot" approach. While it may be possible to save fuel, safety hazards and wasted time are the real problems.