In today's automotive market, most people choose automatic transmission models because automatic transmissions are easier to work with and easier to control than manual transmissions, but automatic transmission models also require study. When an automatic transmission vehicle is driving up or down a hill, if grade is very short, it is normal to use D gear. However, if you encounter a relatively steep grade, you can use L gear or S gear to allow vehicle to gain more traction for climbing a slope; when driving down a large slope, use L or S gear to use engine to control vehicle speed and prevent braking. System thermal degradation. So, how to use automatic transmission while driving up and down hill, today I will give you a brief introduction.
When car is going uphill, trip computer issues upshift and downshift commands depending on driving mode. Therefore, when car is moving uphill, automatic transmission models can use gears such as L gear and S gear to keep engine speed at a higher speed and maintain a relatively large output torque, so that uphill driving is more convenient. . If car shuts off before climbing, you can immediately shift into L or S, which will save car more effort when climbing a slope.
As far as going downhill, if it's a gentle slope, it's usually sufficient to use D and work on brakes. However, if it's a relatively large incline, you still won't be able to use D gear all time. When speed is too high, brake will fail, which is very dangerous. If slope is steep and long, if you press brake in D gear, it will easily cause brake discs to overheat, which will reduce braking efficiency, and braking effect will be greatly reduced. brakes will fail quickly, which is very dangerous. There are also some car owners who directly use N gear to coast downhill and use brakes to control speed. In fact, it is more dangerous. Don't coast in the N gear, though.
Therefore, for relatively large steep slopes, it is best to shift automatic transmission from D to L or S and use full engine braking to drive vehicle forward at a very even speed. , and do not step on it all time. Brake. In short, driving safely on road is the most important thing.