How to drive an automatic car downhill safely?

The car will automatically accelerate when going downhill, and if the speed is too fast, there may be brake failure, control failure, etc., which is very dangerous. Therefore, when going downhill, especially long downhill and long steep slopes, you must control your speed to avoid losing control.

When going downhill, don't make the mistake of thinking that you can slow down at any time as long as you apply the brakes. Frequent use of braking can cause the braking device to overheat, and the car will cause bubbles of fuel in the pipes due to high temperatures, causing the engine to stall or brake poorly. Therefore, when going downhill, it is necessary to use the method of engine braking as the main and foot brake as the auxiliary method for deceleration operation.

For manual transmission models, many people know to put the gear in 1st or 2nd gear when going downhill, and use the engine brake to control the speed of the car. In fact, there is a similar way of automatic transmission, automatic transmission seems to have only one D gear, but in fact, many automatic transmissions also have "snow gear" or "3 2 1 gear", and some have it.

S-gear" or manual mode, which can be used to brake the engine by limiting upshifts on downhill slopes. If you don't have these gears, such as electronic gears, there is actually a manual mode, which operates similarly to the above method. There are also cup stops, which are generally equipped with paddle shifters, and the effect is similar.

If it is some SUV models, it is usually equipped with HDC steep hill descent function, which is a more foolish operation, when encountering a steep slope, press HDC, the driver can also smoothly pass through the steep downhill section without stepping on the brake pedal, at this time, the HDC device will automatically control each wheel, move forward slightly faster than the walking speed, at this time the driver can fully focus on controlling the steering wheel.

The HDC system works in conjunction with the engine brakes and the ABS anti-lock braking system to keep the vehicle "low speed without losing tire grip" when descending steep slopes. The HDC must be in the gearbox position.

When in 1st gear or reverse gear (there are two types of forward downhill and reverse downhill downhill), the system basically sets the upper speed limit.

Although the automatic transmission is indeed much more comfortable than the manual transmission, it is not possible to drive the automatic transmission car when it is always hung in D gear, and you still have to switch different gears in different road sections. For example, when the automatic transmission is uphill, just stepping on the accelerator is actually a wrong operation.

When going downhill, it is safer to brake and slow down from time to time, of course, you should observe the road conditions before and after the slope, keep a safe distance from the car in front, and sound the horn appropriately to remind.

For general downhill roads, no special operation is required, and normal driving is fine. When the slope is large and the distance is short, you can go downhill with brake control; Another example is that the slope is very gentle, and the braking force of the engine can control the speed of the car.

The gear is in neutral, step on the brake lightly, put your hand on the handbrake, keep driving at a constant speed, and always pay attention to the car situation ahead.

When you are going downhill, you must choose to release the accelerator and put your foot on the brake. It's safer to go downhill this way.

When the automatic transmission car goes downhill, you can adjust the gear to manual, hang the appropriate gear according to the speed, and then cooperate with the brakes.

The first is downhill, you need to shift gears to 1st or L (low) and use the foot brakes at the same time. However, frequent foot brakes may cause the brake device to overheat, causing poor braking problems. Don't hang up the nth gear.

For downhill descents, it is generally enough to brake with the D gear. If the slope is very steep, use L gear to control the speed or manual mode acceleration and deceleration to control the speed.

Second, downhill, be careful not to slide in neutral. Many car owners should hang neutral gear when going downhill, thinking that this can reduce fuel consumption, but they don't know that this operation is wrong. It will cause great damage to the gearbox, especially if the oil supply will stop for a long time, which is an irreparable loss to the gearbox.

Since the automatic transmission needs lubrication, when the gear is placed in N gear during driving, the oil pump cannot supply oil to lubricate normally, which will cause the internal parts of the transmission to heat up and be damaged. As a result, the damage to the automatic transmission when coasting in neutral is very significant.

The second is to keep your distance. The safety distance refers to the necessary distance between the vehicle behind and the vehicle in front to avoid an accidental collision with the vehicle in front. Maintaining a safe distance between vehicles is the most direct, effective, extensive and fundamental way to prevent rear-end collisions.

When a motor vehicle is driving on a highway at a speed of more than 100 kilometers per hour, it should keep a distance of more than 100 meters from the vehicle in front of it in the same lane. The minimum distance should not be less than 50 meters.

Also, don't keep going downhill and don't keep applying the brakes. Because automatic transmission cars are generally D gear to the end, although there is basically nothing wrong, but in fact, when going downhill, if you have been in D gear and keep stepping on the brakes, there is still a certain danger. When the car is going downhill, pressing the brakes all the time will cause the brake disc temperature to rise sharply, and too high a temperature will cause the air on the side of the brake disc to expand, creating a gap between the brake discs.

The brake pads and brake discs are widened, which is easy to cause brake failure. Accidents are easy to happen at this time. Therefore, it is a dangerous way to operate an automatic transmission car downhill and only apply the brakes.

You should put in L gear, then keep driving at a low speed, and be ready to brake at any time, so that it is safest to drive downhill.

When driving, you should drive slowly, you should often choose the brake, you can choose the manual mode to limit the relevant posts. You can also choose to combine a low gear or a related limit.

The automatic transmission can choose to engage in L gear, and of course, it can also drive downhill by increasing and decreasing gears.

The safest way to drive an automatic car downhill is as follows:

First of all, I would like to state to you that it is not advisable to step on the brakes in D gear on long downhill sections, and stepping on the brakes in D gear may cause thermal decline of the braking system due to continuous braking, and finally cause brake failure.

If your car is in automatic manual gear (M) or has a low gear (L), then using these two gears is the safest way to go downhill.

The manual automatic car can be transferred to the manual transmission mode in the downhill section, and the speed and speed of the vehicle can be controlled by using the addition and subtraction of the manual mode, but it must be used after the operation is familiar, and it is not recommended that you turn to the manual transmission emergency in the case of unfamiliarity.

The safest way for an automatic car to drive on very long downhill sections is to control your speed while keeping the braking system in good effect, so you can use either M or low gear (L).

Automatic:

Automatic transmission, as the name suggests, does not require the driver to manually change gears, and the vehicle will automatically select the appropriate gear according to the speed and traffic conditions. There are six gears on a general automatic transmission car, from top to bottom: P, R, N, D, S, and L.

The car that drives the automatic transmission only uses the parking gear P gear, the reverse gear R gear, the neutral N gear, and the forward gear D gear can fully meet the needs of general driving, and if you encounter some special driving environments, you need to use other functional gears. Therefore, if you are able to choose the right way to control the controls, the car with an automatic transmission will perform better than the manual transmission.

Many of the cars are now automatic, because it is more convenient for the automatic transmission to go downhill, in fact, there is a different difference between the automatic transmission downhill and the manual transmission, when this software is down, you can turn the clutch to the rear that is, the direction of the forward, as long as you don't care about it, lightly step on the accelerator to go down, and then you can safely drive downhill.

This is actually not a troublesome thing, after all, the automatic transmission car is already very simple, unlike the manual transmission of the car downhill also need to change the clutch shift is very troublesome, this gear only needs to hold down a gear to move forward, although downhill also requires a certain clutch to drive forward, and then lightly step on the brake to adjust the speed.

1. Automatic transmission downhill method.

One of the most important ways to go downhill in automatic transmission is to hang the gear in the forward direction, and then don't care about it, when it comes to downhill, lightly step on the accelerator to drive forward, if you feel that the speed is faster, you can click the brake, so that it is very convenient to go downhill, not very difficult, and many people know that downhill automatic transmission must be much better than manual transmission, after all, manual transmission downhill to adjust various gears is more troublesome.

Second, the difference between automatic transmission and manual transmission downhill.

There is a big difference between the two, especially the manual one to the downhill speed may be to adjust the gear to the high level, if the speed slows down, you also need to adjust to the low gear, and also to step on the clutch, these are very complex operations, now since there is an automatic transmission after the downhill road is very convenient, even in the uphill road is also the most advantageous automatic transmission, of course, the person who is used to the manual transmission is still more convenient to open the automatic transmission, but the person who is used to the automatic transmission and then return to open the manual transmission is more troublesome. <>

3. Is it safe to go downhill with automatic transmission?

In fact, the automatic transmission downhill is still very safe and the performance of the manual transmission is the same, but it is said that it is such a big downhill, there is no need to hang so many gears, and it is relatively easy, many female friends are more familiar with the automatic transmission, and they will not be very afraid of the downhill road, and the women who used to drive the manual transmission are very worried about going downhill or uphill, once they can't go down or can't go up, it will be very troublesome, so now they won't worry about these important problems, because the automatic transmission downhill is still very safe. <>

You can look at the downhill road again and change gears and control the speed of the car, which is the safest way. The best way is to control your own speed, hold the steering wheel, pull the handbrake in time, and shift the car.

Hang directly in D gear, properly control the brakes, and pay attention to the handling of the automatic transmission car during driving. You can reasonably control the speed, change the low gear, pay attention to the brakes, pay attention to the functions and systems of the car, pay attention to the traffic flow, and avoid the phenomenon of brake pad damage.

You need to learn to brake the engine, and replace the brake in this way, so that you can better solve the problem and reduce the speed as much as possible, as long as you don't coast in neutral.

When the automatic transmission goes downhill, first of all, you need to pay attention to the need to change gears, you need to keep the forward gear, and then drive downhill slowly, but you should be careful not to step on the accelerator, or gently tap the accelerator, and descend downhill at a balanced speed.

Many people are very afraid of driving the automatic transmission downhill, because they always feel that the trouble of this block downhill is a little nervous, and they don't know if the gear will hang and so on, in fact, other operations don't need to worry too much, just go downhill normally.

First, focus on slowness.

Automatic downhill transmission may have certain advantages over manual transmission. First of all, it is necessary to focus on slowness, because the speed should be slow, and not too fast, when the downhill itself is a danger, if the man's car is too fast, he can also have some problems with the manual transmission of the car, if you drive fast, there will be problems, so you must be slow, especially the steep slope, you must control the accelerator and brake. <>

2. There is no need to change gears downhill.

And there is no need to change gears when going downhill, if it is the forward gear, it has been attached to the forward unit, and there is no need to adjust the gear to the back in this way, otherwise it will distract your energy, but it will make you more and more tired, and even some dangerous situations, so the downhill is in the forward unit, and then gently click the brake on the line, as long as you gently step on the brake, the car will be slightly more stable. So be sure to pay attention to the downhill and don't need to hang gears. <>

3. Pay attention to speed.

Of course, you also need to pay attention to maintaining the speed of the car, moving forward steadily, the speed of the car is relatively fast, and then add yourself a little bit of the accelerator, you may drive faster, so this speed must be reduced. Only after the speed is reduced, then on the downhill road, the automatic car will be more stable to drive, and it feels relatively safe, so you don't have to worry too much, just pay attention to the throttle and speed, and drive down slowly.

Hang the gear in the right position, apply the brakes slightly when going downhill, pay attention to control the speed, and never coast in neutral gear. It is necessary to pay attention to safety issues, but also to pay attention to road conditions, pay attention to speed control, but also pay attention to the distance between vehicles, pay attention to the risk when going downhill, and pay attention to the driving situation of the vehicle.

Automatic vehicles must brake lightly when going downhill, put their feet under the brake pedal, and use idle speed to slide down, pay attention to not step on the accelerator at this time, and not suddenly hang neutral.

When the car is going downhill, it should be put into L gear, and it should also be lightly braked when going downhill, and the speed can be controlled by hanging into L gear when braking lightly, and it should be noted that when going downhill, do not brake sharply, and do not step on the accelerator.

They will choose to coast in N gear, which is actually equivalent to neutral gear, and they think that coasting in neutral gear can be more fuel-efficient. But in fact, it is also very dangerous to do this, and you need to step on the brakes to do it. The correct downhill gear method should be wrong like this, but the difference is that if you hook up to S gear in sport mode, the trip computer will think that you need high revs and high torque to overtake or climb, which will make the engine work at high rpm, while L gear will not have such a problem.

<> if the vehicle is going downhill, it will also slide by default when you release the throttle, if it is in a long downhill section you can only brake for a long time, but long-term braking will cause the braking force to decrease, that is, the brakes are ineffective, resulting in a hidden function that threatens safety, if the car does not have this function, then it is still relying on the low gear of the gearbox to contain the speed. As for how to hang the low gear, the manual automatic model switches to the M gear is to manually control the gear, and the pure automatic transmission model switches to the L gear or the digital 3, 2, 1 gear.

The low gear of the transmission has a certain engine braking function, if it can be directly engaged in the low gear when going downhill, so as to make reasonable use of the engine braking, and at the same time use the brake pedal to control the downhill speed of the vehicle. When going uphill, it is recommended to also use a low gear, so that the gearbox is automatically shifted downhill for a long time, it is recommended to have S gear with brakes or manual mode 1st gear with brakes, make full use of the engine braking to change the low gear in advance before going down a long slope, and do not wait until after going down a long slope to change gears. Sometimes the speed of the gearbox is too fast, and there will be a situation that the gear cannot be hung up, especially for heavy vehicles.

There is also the downhill slope to drive as far as possible.

Hang L gear, or manual mode to choose 1 gear, this is mainly to use engine braking to control the speed, reduce the brake burden, to prevent brake failure caused by brake overheating, automatic transmission car long downhill is best to take the safest way of driving: depending on the road conditions hang a relatively low speed gear (generally in gear), so that the car can be kept at a relatively safe speed limit, will not be caused by a long downhill negligence caused by excessive speed.