Can a car with automatic transmission put neutral gear when going downhill?

The automatic transmission car uses N gear downhill, and on the surface, it seems that the neutral gear can save fuel, but when the automatic transmission car slides in N gear, because the automatic transmission oil cannot provide effective lubrication and heat dissipation, it is easy to damage the automatic transmission in this way, and the result will outweigh the losses. Therefore, it is recommended to coast with D or other forward gears, and it is strictly forbidden to use N gear.

In addition, when coasting in neutral, once the engine is turned off, the brake booster will lose its effectiveness, and the braking effect will be very poor, which is very dangerous!

From your point of view: downhill with neutral gear is designed to save fuel, for.

Automatic. of more than 98% of the car.

Models. Hang on the downhill slope.

D file. It's the same with neutral. Just as fuel-efficient, because.

Automatic. The car is not in D gear.

Motor. Braking, i.e. the absence of engine obstructions.

Vehicle. The situation of driving. By the way, below. Long slopes. Walk.

Mountain road. To hang in the lowest gear 1 or L gear, so that there is engine braking, improve the driving.

Security. In a word, no matter what the purpose, the automatic car does not need to be in nth gear when going downhill.

It is forbidden to put it in neutral gear while driving, as it will damage the gearbox.

Hello, this is not allowed to be in N gear, it will cause wear and tear inside the gearbox, hang to D gear, thank you.

The automatic transmission car should not use neutral gear during the usual driving process, and the automatic transmission car is absolutely not allowed to coast in neutral gear during operation, and in neutral gear, there are several gear chambers that will burn out the gears because the oil pump does not pump oil. If you coast in neutral for a long time, there is a lot of damage to the vehicle. Automatic neutral has the following functions:

1. For short-term parking, it can be turned off or not.

2. For trailers in case of failure;

3. When waiting for the red light for a short time, you can put it in the "n" position.

When the automatic transmission is going downhill, it is not possible to coast in neutral. Neutral coasting is more fuel-intensive than hanging in D gear, because the gear has been removed when neutral coasting, and the engine is in the idle state, and the engine in the idle state needs to be given a certain amount of oil to let it run at idle.

In D gear, because the wheels work together with the engine, the wheels drive the engine, and there is no need to give the engine an idle fuel supply. Therefore, in D gear, the automatic transmission car is more fuel-efficient in D gear than in neutral gear.

If you slide in neutral with manual transmission, if you are downhill and there is no engine braking, you will load the brakes more when you run in neutral, especially when you go down the slope and keep going down, you only use the brakes to brake, which is the most dangerous neutral coasting.

Manual transmission cars are not allowed to hang neutral gear when going downhill, and the "Implementation of the Road Traffic Safety Law of the People's Republic of China" clearly prohibits turning off the engine or sliding in neutral when going down a steep slope.

According to Article 62 of the Regulations for the Implementation of the Road Traffic Safety Law of the People's Republic of China, driving a motor vehicle shall not engage in the following acts:

1. Drive when the doors and compartments are not closed;

2. Hanging and placing items that obstruct the driver's vision within the front and rear windows of the motor vehicle cab;

3. Dialing and answering handheld**, **TV and other behaviors that hinder safe driving;

4. Turn off the ignition or slide in neutral when going down a steep slope;

5. Throwing objects on the road;

6. Driving a motorcyclist off the handlebar or hanging items on the handlebar;

7. Continuously driving a motor vehicle for more than 4 hours without stopping for a rest or stopping for less than 20 minutes;

8. Honking in areas or road sections where honking is prohibited.

The neutral coasting of the car refers to the operation method in which the driver puts the gear lever in the neutral position, disconnects the connection between the engine and the driving wheel, and uses the inertia of the vehicle to drive while the motor vehicle is driving. For manual transmissions, the gear lever is placed in the middle position; In the case of automatic transmissions, the gear lever is placed in "n" gear.

In the "Road Traffic Safety Law of the People's Republic of China", it is clearly stipulated that when the car is going downhill, it is not allowed to slide in neutral gear and slide in neutral when the engine is turned off. In the driver's license road test, the demerit items listed in the road test are also stipulated to slide in the gap for more than 3 seconds, and the test will not be passed.

So why does the law strictly prohibit neutral sliding, especially downhill neutral sliding?

First, let's take a look at what happens when the car coasts downhill in neutral. When the car slides downhill in neutral gear, the speed of the car gradually increases due to gravity, which is very dangerous. In order to control the speed of the car, we have to press the brakes frequently, when the brakes are too frequent and exceed the heat dissipation capacity of the brakes, the temperature of the brakes will rise rapidly, which will cause the thermal decline of the brakes.

At this time, the friction torque of the brake decreases significantly, the braking force is seriously insufficient, and even the braking force will be completely lost, and the braking distance will become longer or the car cannot be braked at all. There are often some large trucks on the highway that fail to brake after descending a long hill, and this is mainly the reason.

Therefore, it is very dangerous for the car to coast in neutral when it is downhill, and it is very dangerous to rely only on the car's braking system to control the speed!

Hello downhill can not be hung neutral sliding, only brake to control the speed, this is definitely a dangerous hazard, if you do this in a long slope position, the braking system will overheat and suddenly fail, resulting in accidents.

Downhill hanging into neutral gear is not conducive to safe driving, that is to say, there is a high danger, but the small slope of the city road or the intersection traffic light in front of it can be hung into neutral gear according to the actual situation and vehicle speed to carry out vehicle coasting driving, whether this downhill should be hung into neutral gear also depends on the actual situation, long slope steep slope is not recommended to use neutral sliding.

It is not recommended to slide in neutral gear when going down a steep slope, which is not good for safety, and should be in the gear, use the gear to assist the braking.

It's not that you can't, but you can't hang neutral, there is no engine braking, if it is a long slope, the speed will get faster and faster, and the brakes will be overused.

Gliding in neutral while going downhill is a joke of life. When coasting in neutral, the car moves forward by inertia and gravitational acceleration without engine braking, and the speed of the car becomes faster and faster. When driving, the effect of braking does not require engine braking.

There are also a lot of downhills on the highway, especially the sections through the mountains. Some highways also feature downhill roads that are tens of kilometers long. For example, the 27-kilometer section of the Kunming Expressway in Yunnan Province is 27 kilometers long.

The downhill road, with a speed limit of 40 km/h, has been under construction since the road was built, and hundreds of people have been killed in traffic accidents here. Because it is a motorway, the original speed was 100 km/h, and suddenly there was a speed limit of 40 km/h. A lot of people can't react.

This must not be sloppy. You have to obey the speed limit, even if it's 40. Then slow down first, apply the brakes first to reduce the speed from 5th to 4th gear, then switch to 4th gear, and then keep the speed within 40 km/h, of course, you can also use 3rd gear to drive.

Experienced truck drivers know that on long downhill sections, you have to put a low gear on the downhill slope. This is because in the case of low gears, the reverse resistance of the engine can be used to control the speed of the vehicle. The principle of this is to rely on inertia to convert the kinetic energy of the vehicle, part of which is converted into the kinetic energy of the engine compressor.

Without stepping on the accelerator, most of the kinetic energy is lost during the intake and exhaust of the engine, so the speed of the vehicle can be reduced. The lower the gear, the more pronounced the effect. In this way, the frequency of use of the braking system is greatly reduced, which greatly reduces the probability of the occurrence of brake thermal attenuation.

Braking relies on the friction between the brake pads and the brake disc to create resistance, which converts the kinetic energy of the car into thermal energy. When the car is driving at high speeds, the temperature generated by the friction between the brake pads and the brake disc is very high. As you continue to apply the brakes downhill, the sides will continue to rub together.

When the temperature reaches a certain level, the brake pads and brake discs will turn red due to the high temperature, which will affect the braking performance. When braking performance is affected, it needs to be stopped for natural cooling before braking performance is restored. Think about how a car without brakes goes downhill, so it's dangerous to keep applying the brakes on the downhill road.

The correct thing to do is to apply the brakes intermittently and reduce the speed of the car. Control within a controllable range. When you feel that the speed of the car is fast, press the brakes to control the speed.

Once it is back to normal, release the brakes. Repeat this to control the speed of the car. Conclusion:

When going downhill, we must add and decrease gears according to our own speed, do not slide in neutral or go downhill in neutral, and be sure to pay attention to safety when driving outside. The above is the answer to the question, if you have better suggestions or opinions, please leave a message in the comment area to discuss.

At this time, it is not possible to hang neutral, you can hang a first or second gear, so that there is a certain guarantee for your life safety, and it is not easy to have some out-of-control phenomena.

It can be hung on top of the S gear, so that it can be driven at low speeds and keep the speed of the car even. Don't put in neutral, it's a very dangerous behavior.

When the car is going downhill, it should be in low gear to reduce the speed of the car, but not in neutral, which is very dangerous behavior and may cause the braking system to overheat or malfunction.

You can't hang neutral, otherwise it's dangerous.

If it's just a short break, it's over all at once, in fact, you don't need to change gears.

If it's a long slope and the car is getting faster and faster, put 1st gear or the lowest gear of the automatic gear.

Also, don't apply the brakes for a long time. If you step on it for a long time, it means that the gear is too high, and you have to switch to a low gear.

There are two important principles, one is not to apply the brakes for a long time, otherwise the brakes may fail.

The second is to use the braking force of the engine in the low gear to control the speed.

When going downhill, you must learn to use the engine to drag the car, generally when you go downhill, you first change to resist, generally second or third gear, and then don't step on the clutch, don't refuel, the power of the car will slide the engine speed high, the speed will also become faster, and so fast to a certain extent to exceed your expectations when you step on the brakes, and this brake begins to light, wait for the car to slow down a little heavier, wait for the car to be very slow and then let go, let the car slide with gears, to a certain speed when repeating the above action

Remember, you must not coast in neutral gear, and you must not keep pressing on the brakes to go downhill, because if you keep stepping on the brakes, the brake shoes will overheat and burn, and the brakes will fail.

There is also a problem that the hydraulic brakes of the car now have a vacuum booster system, in case the engine turns off when coasting in neutral gear, it can not provide enough vacuum, and the hydraulic braking effect without vacuum assistance is very poor, and it is impossible to let the car stop in a short distance.

If the air brake system does not provide enough usable air pressure for a long time when the engine is turned off, the consequences are still the same.

Therefore, the car cannot coast in neutral when going downhill.

It is strictly forbidden to hang neutral gear when driving in automatic transmission, which will damage the gearbox. The car downhill of the hand degree dynamic gear can be hung neutral, however, it is recommended not to hang neutral gear downhill, which involves the safety of vehicle braking, such as answering the vehicle in the gear when going downhill, if the brake suddenly fails, the gear also has a certain role of drag gear reduction, which can reduce the accident in the range of a small amount. Personal opinion, for informational purposes only.

Why can't the car be in neutral when going downhill? Many drivers are not clear, and you will understand after the analysis.