In terms of speed and rpm, a small number of friends believe that the two are closely related, showing a positive correlation increase, but this is not the case. Speed and speed do have a certain correlation, but the correlation between the two is a complex multi-link, not simply to increase the speed will be able to improve the speed, the two factors between the link also include torque, range and transmission form and the proportion of output power. In addition, when it comes to fuel consumption, many riders also think that the correlation between the two is very strong, but in fact, the correlation between the two is also complex and diverse. However, in general, the fuel consumption of cars with a higher rate of change in speed is faster, and the speed of rotational speed is mostly reflected in the speed of fuel consumption of the car. As a result, to some extent, most people who start to the car like to choose a low-speed car, thinking that this car is more cost-effective. Is this understanding correct?
In most family cars on the market, this view is one-sided, but it does make sense. There is no positive correlation between vehicle speed and speed, but both have ranges of interval values. Generally speaking, the minimum speed of a private car is in the speed range of 60km/h to 80km/h, and when it rises, the speed often increases accordingly. When the ordinary family car is cruising at high speed, the speed is also infinitely close to the maximum, and when the cruising speed reaches 120km/h, its engine speed is generally about 3500 rpm, but in the range of 1200 ~ 4000 rpm, it belongs to the normal value range. As mentioned above, lower speed cars are more cost-effective, so for ordinary family cars, when the speed reaches 120km/h, how much speed is normal? Remember this speed, lower than that is a good car!
First of all, since the speed and speed are not completely positively correlated, please make it clear that the relationship between the speed obtained according to the model, engine, operating condition, and the state of the car is not exactly the same. As mentioned earlier, in addition to these subjective influencing factors, objectively the influencing factors between the two should include torque, measuring range and transmission form, each power ratio, etc. How should the rider understand these influencing factors? First look at the torque, low torque very much affects the speed of the engine. In general, low torque is inversely proportional to speed, the weaker the engine, when the car accelerates to high-speed cruising, the speed becomes correspondingly higher, on the contrary, the stronger the engine with low torque, the lower the speed of the vehicle in high-speed cruise. In general, when a car is driving, the most common resistance is resistance to wind and road friction.
When the car is cruising at high speed to 120 per hour, wind resistance and road friction are the main overcoming tasks faced by the car, and generally require 30 kilowatts of electricity to support the operation of the engine. Cars of the same weight, sports private cars and SUVs have relatively high engine power. Most lower-power household vehicles often require about 3,000 rpm to maintain an output power of up to 30 kilowatts, that is, to cruise at a high speed of 120 kWh. Like a low-torque engine-configured car, it may be possible to cruise at 120 rpm at less than 2000 rpm. Therefore, in the case of the same transmission, the stronger the power and the greater the torque, the easier it is to reduce the speed in the state of high-speed driving. In addition, in addition to the torque of the engine affecting the speed of the car, the impact of the number of gear changes of the transmission on the speed is also obvious.
In short, the wider the gear ratio range of the transmission under the same power conditions and the same torque, the lower the speed of the high-speed cruiser. Models with many transmission shift positions such as caie 9AT, 8AT, and general 9AT have a wide range of gear ratios, and the speed is also below 2000, and the car is mostly cruising at a high speed of 120 per hour. Conversely, cars with few transmission shifts, such as manual transmissions and CVT transmissions, tend to not drop anywhere even if the power input is strong and the speed is accelerated. Finally, the type of engine is also the key to affecting the speed of the car. The wider maximum torque speed platform brings a wider peak torque speed range to the engine, bringing stronger power to the car, and at this point, it can also make the car spin at a lower speed after high speed. That is to say, the wider the platform of the maximum torque speed of the engine, the stronger the power, the lower the speed.
It is the two typical representatives of turbocharged engines and naturally aspirated engines. The turbocharged engine's maximum torque speed platform is wider and more powerful, enabling cruising operations at higher speeds at lower speeds. In addition to the distinction between the two types of turbocharging and self-priming, the inner diameter of the pipeline of the engine is two types of differentiation that affect the same speed. Engine types are generally divided into two types: short stroke large diameter and long stroke small diameter. Large-diameter, short-stroke engines tend to squeeze out more power at higher speeds, so they typically get higher speeds and higher fuel consumption. Typical short-stroke, large-diameter engines include the French-based high-speed engine and the Honda Redhead K20A engine. In contrast, most common family cars are long-stroke, small-bore engines, which are fuel consumption-focused and tend to have lower speeds at high cruising speeds. In summary, while maintaining a high-speed cruise speed of 120 per hour, models with a speed of less than 2000 are usually good cars, and such performance can be carried out in a variety of models such as General Motors, BMW, and Audi, and maintain a speed of about 1700 in some models
Conversely, low-displacement intake and vans typically need to reach 3000, 3500 or higher rpm to complete a 120-speed cruise. The quality of the car can not only be judged by the speed of high-speed cruising, but in summary, most of the cars with low speed during high-speed cruising are usually cars with strong power, high fuel consumption and many gears, which are recognized by the market as good cars.