Careful drivers may find that when the vehicle is turned off, the brakes can’t be stepped on. Many drivers wonder why this is so. Some drivers may consider that if the car stalls during driving, will the brakes fail? How do I park my car?
After the flameout, why can’t the brakes be pressed?
After the car is turned off, some cars are hard to step on the brakes, and some cars are empty and unresponsive. This phenomenon has also been discovered by many drivers. The specific reason is simply that the car brakes need the engine to work to generate vacuum to provide brake power. After the engine is turned off, the vacuum required for brake power is gone, so the brakes can’t be stepped on.
Cann’t you step on the brakes when you’re driving?
According to the above theory, after the car is turned off, the brakes should really be stuck, but this is only limited to automatic cars. Because after the automatic car is turned off, the engine immediately stops rotating, even if it is hung in the D gear, the wheels can’t drive the engine to rotate, and without rotation, it can’t produce vacuum power.
However, the manual transmission car is different. After the engine is turned off, as long as it is not in neutral, the rotation of the wheels can still reverse the rotation of the engine. As long as the engine rotates, it can continue to generate vacuum and provide braking assistance. Therefore, when the manual transmission car is turned off during driving, don’t put it in neutral, keep the original gear and just step on the brake, which can also give the engine a reverse braking force and make it easier to stop.
What should I do if I turn off the engine while driving?
How to stop the car when the automatic brake fails? Remember these operations to save your life. No matter what car it is, the brake is always the most critical core, which is directly related to the safety of all of us. It is a creepy thing for every driver to hear that the brakes are out of order. When encountering such things, we must be calm and often panic, and blind operation will only brew a bigger accident. The essence of the difference between automatic transmission and manual transmission is that the gears of automatic transmission are divided into P, R, D, L, S and N. Although there are so many gears in automatic cars, most car owners like to use D gear when driving, because this gear is really convenient to operate. But what should you do once the brakes of an automatic car fail and the speed is at a high speed of 120 yards?
When the brakes fail, the first thing to do is to calm down, don’t be very impatient, and don’t touch the west. If you turn the steering wheel wrong, there will probably be an accident. The first thing you have to do is to turn on the double flash in the car. Only when the double flash is turned on, the people behind will know that there is something wrong with your car, and they will pay attention. When they approach you, they will slow down and bypass you. If your car is automatic, you can switch to manual mode, which is a car that can reduce the gear and brake automatically. You can also shift the second gear first, and then shift the L gear, but be careful not to shift the P gear or the R gear to avoid accidents. If these don’t work, you need to find some objects and make full use of friction to reduce the speed and achieve the braking effect.
Rational use of control vehicles. Automatic transmission When it is found that the brake of the vehicle is out of order, first release the accelerator pedal, and put the gear on the manual transmission to lower the gear from the high gear to the low gear in turn. Among them, the braking effect of automatic transmission vehicles is generally not as obvious as that of manual transmission vehicles, and some vehicles will prohibit automatic gearbox downshifting in order to protect the gearbox, so the gears should be lowered in turn after each downshift. Similarly, when pulling, the brake release button should be pressed and pulled continuously, and it cannot be pulled to death. The same is true for electronics. After pulling, press it until the vehicle stops and hangs in the parking gear. If the brakes suddenly fail when the car is driving at high speed, it can be braked directly by electronics. After starting the electronics, the braking system will brake the four wheels slightly lower than the full braking, and the full braking will only be carried out when the speed of the car slows down or is close to a stop. However, it is worth reminding that in the process of emergency braking, if the vehicle is turned off, the electronic function still works. It should be noted that the electronic switch must be held, and only in this way can the braking effect be achieved. It’s useless if you just pull it and let it go.
1. Don’t hesitate to step on the brakes immediately.
After the vehicle is turned off, the vacuum of brake booster will not be lost immediately, and the brake will not fail immediately, but there is no power booster system, and the brake pedal is hard to step on, which can not achieve normal braking effect. But our top priority is not to hesitate. We should put on the brakes at once and use a little more strength. Usually, we can stop the car.
When braking, don’t step on it twice, because stepping on the first foot will consume the vacuum, and the braking effect will be greatly weakened when stepping on the second foot, so you need to step on it once, and you can’t choose to use the point brake method.
2. Don’t hit the direction
The engine not only provides braking power, but also provides steering power for the steering wheel. When the engine is turned off, the steering pump that provides power for the steering wheel will also lose power. At this time, the force required to turn the steering wheel is very large, and it is hard for an adult to turn, making it even more difficult for girls to turn. So at this time, we should not beat the steering wheel, so as not to turn back, just grasp the direction and keep the vehicle straight.
control
After the brake fails, it can be used to brake, but it should be controlled properly, and the car should not be pulled suddenly because of panic, otherwise the steel wire rope will be broken because of excessive force, which will make the car fail, or the rear wheel of the car will be locked and the car will be out of control.
The correct way is: in high-speed driving, the first thing to do is to loosen the throttle and slow down by downshifting. When the speed is slightly stable and obviously drops, pull the car to stop slowly, and tighten, loosen, tighten and loosen it several times to slow down the car. It should be noted that when pulling the handle of the car, you should press the safety button of the handle, so that the handle can be operated freely in the process of tightening and loosening, and the car can be prevented from locking when tightening.
The electronics of some models also have the function of assisting emergency braking (this function needs to consult the manufacturer or dealer). If extreme conditions occur during driving, you can first release the throttle and operate the electronic button to brake the vehicle. This situation is somewhat complicated. By pulling up the button, the vehicle will brake urgently. Note: at this time, the braking of the vehicle is not mechanical parking. Under high speed, the emergency braking is to hydraulically brake all four wheels through the ESP control unit with a force slightly less than the full braking force, and when the vehicle is close to the static state, it can be slowed down or parked directly by electronics.
Forced downshift
In this way, manual transmission and automatic transmission are different. A car with manual transmission should first step on the clutch to the end, then retreat into neutral and then release the clutch. Then step on the accelerator as much as possible, and then step on the clutch to the end. At this time, retreat to the low gear, put the clutch in a semi-linkage posture and put it back. Automatic transmission vehicles can adjust the gear by shifting paddles and manual modes.
Emergency lane avoidance
If the above methods still can’t brake, you need to turn on the double flash at this time to avoid hurting innocent vehicles. At the same time, it is necessary to find some suitable sections to slow down. It is a good choice to have that kind of emergency escape or uphill road.
Why did it stall?
When the vehicle stops, it can’t be started by ignition, and it is ready to drive away. We must first check what causes the flameout. Usually, there are three reasons:
1. Device failure
Generally, the ignition coil, capacitor and electronic ignition module fail. Usually, there is no problem in the initial ignition, but it will turn off after a period of time, and then it will turn off after a period of time, so frequently.
2. Circuit failure
In case of flameout caused by low-voltage power failure during driving, the switch and fuse box of the starter should be checked at this time.
3. Oil circuit failure
There is no oil in the fuel tank, the gasoline pump is damaged, the oil pipe is broken, and the oil inlet is blocked, all of which may cause the car to stall during driving. The car stall caused by oil circuit failure is usually difficult to start again, but sometimes it can be re-ignited.
When the car turns off during driving, you should first be calm and don’t panic. If the brakes really can’t stop the car, you can choose to pass, but be careful not to pull the brake line too hard, so it will not pay off. There is another way to quickly put N gear, and then start the car by ignition during driving, but at this time, you must pay attention to the surrounding vehicles, and if necessary, you can turn on the double flash to remind the surrounding vehicles. When you start up, you still have to park the vehicle on the side of the road slowly, and then get off the bus to check the vehicle failure.