Automatic gears are introduced as follows:

1, P-parking gear: when the parking is not used, the gear in this, this time the wheels are in a mechanical hold state, can prevent slipping.

2. R-Reverse gear: used when reversing.

3, N-neutral gear: temporary parking (such as red lights), with this gear. Note that this gear indicates neutral, and to prevent the vehicle from skidding on the slope, be sure to apply the brakes.

4. D-Forward gear: Use this gear when moving forward.

5, L - low gear: in the downhill, or down a long distance slope, put the gear here, can limit the car's gear automatically only in the lowest gear (equivalent to the first gear of a manual car), can make the car in the downhill using the engine power for braking, the driver does not need to step on the brakes for a long time leading to brake pads overheating and dangerous.

6, S indicates sports mode: when you put in this gear, the gears can be freely switched, only the shift timing is delayed, allowing the engine to maintain a high speed for a period of time, so that the power of the car increased. In this gear will cause fuel consumption to increase.

Automatic principle

Engine power is transmitted through the transmission, the transmission is also a key indicator of the impact of fuel consumption, generally speaking, automatic transmission than manual transmission fuel consumption is higher than 10%. Whether manual or automatic transmission, the more gears the more fuel efficient.

Automatic transmissions, which utilize a planetary gear mechanism to change speed, can automatically change speed according to the degree of the accelerator pedal and speed changes. The driver only needs to manipulate the accelerator pedal to control the speed of the car.

Generally speaking, there are several types of automatic transmissions commonly used in automobiles: hydraulic automatic transmissions, hydraulic transmission automatic transmissions, electric transmission automatic transmissions, step mechanical automatic transmissions and stepless mechanical automatic transmissions.

The most common is the hydraulic automatic transmission. Hydraulic automatic transmission is mainly composed of hydraulic control gear transmission system, mainly contains automatic clutch and automatic transmission two major parts. It is able to shift gears automatically according to the opening of the gas pedal and the speed of the vehicle.