The throttle of an automatic car is controlled.

First of all, use the throttle to control the upshift (fuel saving)

As we all know, under normal circumstances, when the speed reaches about 2000 rpm, the computer will control the upshift (when the speed suddenly drops by several hundred rpm), and the upshift speed is relatively fixed. But as long as you change the refueling rhythm, you can change the upshift speed. For example, a car usually upshifts at 2200 rpm. When the speed rises to 1800 rpm, you can suddenly release the throttle, and the computer will immediately control the upshift after releasing the throttle.

When you want to drive, the shift speed is low. When you release the throttle, the computer will think that the load is reduced. At this time, the car does not need a large torque output, so it will control the upshift in advance, which can reduce the engine speed at the same speed. The vernacular is to control the speed in a relatively low range, which is more fuel efficient! ! !

Second, use the throttle to control the downshift (safety)

Similarly, you can also use the throttle to downshift in advance. As long as the car suddenly steps on the accelerator (even if it is released immediately after stepping on it, and then slowly steps on the accelerator), the computer will immediately control the downshift. Similarly, if you suddenly step on the accelerator deeply, the computer will think that the load will increase at this time and the car needs more torque output, so it will take measures to downshift and increase torque to obtain better acceleration performance.

For example, when overtaking, you can step on the accelerator deeply and then release it, so that the transmission will downshift faster, accelerate better and be safer.