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1, p file: the English full name of p is parking, which means parking file/parking file. When parking for a long time, the car should be hung in this gear. At this time, the gear of the transmission system is engaged and the car will not slip. Generally, when parking for a long time, it should be pulled together with the handbrake to ensure parking safety.

2.N gear: the English full name of N is neutre, which stands for neutral, which means the same as the neutral of manual gear. When the gear is set to N gear, the engine is disconnected from the transmission system, the engine is rotating, the gearbox does not move, and the car will not move.

3.D gear: the full English name of D is drive, which stands for forward gear. When the gear is in this position, the car can move forward. At the same time, the automatic gearbox in gear will automatically shift gears according to the speed and throttle, without stepping on the clutch like a walking car. The operation is much simpler and more convenient. Usually use this gear when driving normally.

4.S gear: The English full name of S is sport, which means sport mode, which means that this gear is not available in all cars. When the gear is set to S gear, the gearbox will still shift gears freely, but the shift time will be delayed, so that the engine can keep high speed for a long time, thus increasing the power of the vehicle.

5.R gear: the English full name of R is retro, which stands for reverse gear and the gear to be used when reversing. Most cars now have reversing radar or reversing video images. When the gear is set to R gear, these devices will also start at the same time, which ensures the safety of our reversing. Of course, it is also important to master the rearview mirror to judge the distance when reversing.

Precautions:

The mythical 1: D gear is still engaged when parking for a long time.

When vehicles equipped with automatic transmission encounter traffic jams, some owners often only step on the brake pedal, but the shift lever remains in D (driving gear) without shifting gears. If the time is short, this is allowed. However, if the parking time is long, it is best to shift into N gear (neutral gear) and tighten the parking brake. Because when the shift lever is in the D position, the automatic transmission is generally unable to move forward. If you step on the brake pedal for a long time, it is equivalent to forcibly stopping this forward movement, which makes the transmission oil temperature rise and the oil easily deteriorate, especially when the air conditioning system is working and the engine idle speed is high.

Myth # 2: When driving at high speed or downhill, the N gear will slip.

In order to save fuel, some drivers set the gear lever to N (neutral) when driving at high speed or downhill, which is likely to burn the transmission. At this time, due to the high-speed rotation of the transmission output shaft, the engine runs at idle speed, and the oil supply of the transmission oil pump is insufficient, and the lubrication condition deteriorates. Moreover, for the multi-disc clutch inside the transmission, although the power has been cut off, the passive disc is driven by the wheel to run at high speed, which is easy to cause vibration and slippage and cause adverse consequences. When it is really necessary to slide down a long slope, you can keep the gear lever in the D position, but don't turn off the engine.

Baidu encyclopedia-automatic transmission