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List of the contents of this article:

• 1, What is the speed of the car
• 2, What does car speed mean
• 3 
  、What is the appropriate speed of the car

Car What is the speed of rotation?

The speed mainly depends on the speed and gear. It is enough to maintain it at about 3000. In addition, low-speed and high-speed, which are harmful to the engine, should also be avoided. The most fuel-efficient driving state is driving in a straight line at a uniform speed. The most fuel-efficient speed is 60 to 80 kilometers per hour for small-distment vehicles and 80 to 100 kilometers per hour for medium-distment vehicles.

The idle speed of automatic transmission is about 5-10km/h, depending on the specific model: generally speaking, the engine speed of automatic transmission is higher than that of manual transmission, generally 800-1000r/min.If you don't step on the accelerator when idling in D gear, the speed of the car is about 5-10km/h; the idle state refers to the working state when the engine is idling.

When the speed reaches 120 km/h, the speed is generally 3400 rpm.

Speed (km/h)=[tire width (mm)×(aspe ratio/100)×2+hub diameter(inch)×24]×14159×60/1000/final transmission ratio/corresponding transmission ratio×engine speed(rpm).

According to the most common engine, the 4-cylinder 6-displacement, the 5-speed 4000 rpm speed is about 130-140 km/h. But this is conditional. It depends on the gears. The specific car is also different, such as the weight of the car, the shape, the width and size of the tires, etc.Generally speaking, the higher the speed, the faster the speed.

What does car speed mean

1. The speed of the car in the speed table refers to the engine speed, that is, the engine engine The speed per minute of the crankshaft reflects the working condition of the engine. The tachemometer shows the speed of the car.

2. The speed of the car engine refers to the high or low speed of the engine, which is related to the number of works per unit time or the size of the effective power of the engine, that is, the effective power of the engine changes with the different speeds. Therefore, when explaining the size of the effective power of the engine, its corresponding speed must also be indicated.

3. The speed of a car refers to the speed of the engine. The speed of the engine is related to the number of works per unit time or the size of the effective power of the engine, that is, the effective power of the engine changes with different speeds. Therefore, when explaining the size of the effective power of the engine, its corresponding speed must also be indicated.

What is the appropriate speed of the car

The car tachmeter 2200-2500 is normal.Cars all have a speed pointer, so you can control the approximate speed of the car by yourself. During driving, the engine speed of a car is about 2200-2500, which is most appropriate. No matter in which gear, the engine speed is kept at about 2200-2500.

Car tachymeter 2200 to 2500 is normal. Generally speaking, the tachometer is divided into several areas. The white scale area is the safe speed range, the red scale part is the dangerous speed range, and some models are also divided into green areas, which indicates that the speed is the more economical range of the engine.

Generally, the speed is also between 1000 and 3500. At about 3000 rpm, the engine output torque is the largest, and then it is inversely proportional to the speed.

Extended data: When driving, the engine speed of general electric injection vehicles is most suitable for about 2200-2500.No matter which gear, it is most economical to keep the engine speed at about 2200-2500. Add a little more oil when changing gears than normal driving conditions, so that the speed can reach a little more than 2500.