A car equipped with a continuously variable transmission is called a continuously variable transmission car. Continuously variable transmission is different from automatic transmission. Continuously variable transmission is a kind of automatic gearbox, also called CVT gearbox. Compared with ordinary automatic gearbox, it has smoother shifting, no impact and lower fuel consumption. Its disadvantages are high maintenance cost and shorter service life than ordinary automatic gearbox.
It is worth noting that the novice CVT is:
1, climbing a long slope with D gear under heavy vehicle load will easily lead to overheating of CVT gearbox. When climbing continuously, it is recommended to shift the L gear to keep the maximum torque output of the engine to complete the uphill. When climbing uphill with L gear, the contact arc radius (speed ratio) is constantly changing according to the speed and torque, and the amplitude is limited in a very small range.
2. Don't step on the accelerator deeply after the 2.CVT model starts, because the engine speed will increase instantly when stepping on the accelerator deeply, but the speed will not increase greatly, which will waste fuel and cause great wear and tear on engine parts (especially when the car is cold and the oil temperature is low).
3. For CVT models with supercharged power (T power), don't step on the accelerator deeply near the engine speed of supercharged intervention, because the turbine intervention is too fast at this time, and the pulley will slip, which is why it is difficult for small-displacement supercharged engines to match the CVT gearbox.
4, CVT new car running-in period D file starts, slowly refueling. D-speed automatic transmission, allowing the on-board computer to optimize control. Press the brake pedal when shifting gears. From D to manual, you don't need to step on the brake pedal, just dial it. You can also start manually in 1 gear after you are familiar with manual gear. The combination of manual and automatic is the best scheme to complete running-in.
Extended data
variable drive
The concept of continuously variable transmission was put forward by Leonardo da Vinci more than 500 years ago. CVT will replace planetary gear automatic transmission in some cars.
Since 1886 applied for the patent of the first continuously variable transmission, this technology has been improved and improved. Three automakers (including General Motors, Audi, Honda and Nissan) are designing power transmission systems around CVT.
The continuously variable transmission is different from the traditional automatic transmission. It has no gearbox consisting of a group of gears, that is, it has no interlocking gears. The most common type of CVT can run on a well-designed pulley system, which can provide infinite variability between the highest gear and the lowest gear without discontinuous steps or gear shifting.
Most cvts have only three basic components:
1, high-power metal or rubber belt
2. Variable input "drive" pulley
3. Output "driven" pulley
CVT also has various microprocessors and sensors, but the above three components are the key components to realize this technology.
References:
Baidu Encyclopedia: Continuously Variable Speed Cars