Friends who drive all know that the automatic gearbox has four basic gears, namely P, R, N, D, representing parking, reversing, neutral gear, and driving. In fact, in addition to these four basic gears, some cars also have S gear, it is estimated that many people have not used this gear until the sale of cars, but the flexible use of this gear is actually very helpful for the usual use of cars.
Before talking about the S file, we must first popularize a knowledge. For manual models, how much throttle is basically equivalent to the opening size of the throttle, but for automatic models, how much throttle is actually to let the driving computer know how much power the driver needs now. We know that the engine is generally more torque at high speed, when you step on the throttle, the driving computer will think that you need stronger power, so the vehicle will increase the engine speed, but to increase the speed can choose to downshift, or not to downshift.
After the popular science returned to the theme, S gear is the abbreviation of Sport gear, and D gear can make the vehicle forward, but the vehicle's power performance in S gear will be more aggressive. In fact, S gear is not a physical gear in the gearbox, but more like a signal given by the driver to the vehicle. After the driver is hooked up in the S gear, the driving computer will think that the driver wants more power at this time, so it will make special settings for the ECU and gearbox.
After attaching to the S gear, the time for the car to change gears will be delayed, so that the engine can be kept at a high speed as much as possible, and the speed of the power response will also be increased, so as to obtain more torque.
S gear means that the vehicle's power response is faster, so you can use more S gear when you want to drive intensely, but S gear is not only this one use case. If you need to overtake, even if you have a big foot throttle in the D gear, the downshift and high speed will still feel half a beat slower, because most models give priority to smooth driving and fuel saving in D gear. At this time, if you hang up to the S gear, you can clearly feel that the reaction time of the driving computer is faster than that of the D gear, the power response is more rapid, and the downshift is more sharp. Especially when it comes to overtaking some large trucks on national highways, the faster you overtake means that the shorter the time you occupy the opposite lane, the safer it is to drive.
In addition to overtaking, hill climbing is also a car scene with high power requirements. Generally, the slope of the underground garage is relatively steep, and you can try the S block climb. Of course, hanging S gear is also suitable when running mountain roads.
The S gear can get a stronger power performance, but it also comes at a cost. When hanging into the S gear, the gearbox logic is more inclined to the low gear and high speed, and the fuel consumption is bound to increase, so the use of S gear should still be flexible according to the car environment.