Nowadays, there are two ways to start the car, one is the traditional key to ignore, the key is inserted into the ignition lock cylinder and rotated, which is also the most common in the current family car. The second is a one-button start, there is a start switch on the car, just step on the brake and press the switch to achieve ignition, eliminating the key link, which is more common in more expensive cars or high-end models of ordinary family cars. When actually using the car, many people will encounter this situation, the vehicle did not turn off after stopping, they did something and forgot not to turn off the ignition, and when they drove again, they rotated the key to ignite, and then they would hear the sound of clicking teeth. After listening to it, it was very distressing, and I went to the 4S store to check if there was any problem. So is this operation harmful to the car, and what parts will be harmed?
First, let's understand why this phenomenon happens. When the car key is rotated to the starting position, the starter will stick out its head and start working, and its head has some gears that stick out just enough to engage with the gears on the flywheel. In this way, the rotation of the starter can drive the flywheel to rotate, and the flywheel can drive the crankshaft and piston to operate, and the various parts will start to work normally. When the engine can be maintained by its normal operation, the head of the starter will retract and will no longer participate in the engine work and will no longer rotate. In other words, the starter only works when the ignition is ignited, and the working time is only about two or three seconds each time.
After understanding the work of the starter, you can know why it makes a clicking sound, because the flywheel is rotating normally, the starter should be sleeping, and the two do not interfere with each other. At this time, the driver forgot and turned the key to the start gear, and then the starter had to work again and stuck his head out again. At this time, because the flywheel is rotating, the teeth of the starter cannot mesh with the teeth on the flywheel, and it will collide and rub with the flywheel, making a clicking sound. At this time, the driver heard the sound, quickly released the key, the starter gear retracted, and the sound disappeared.
Although it sounds loud, generally speaking, once or twice once in a while there is no damage, there are many people who have experienced this situation, and they did not turn off the ignition and ignited it twice, but it did not cause damage to the parts. Because the gear of the starter and the gear of the flywheel collide, the only part that can be damaged is the gear of the two, and there will be no damage elsewhere. And the two gears because they have to bear a lot of force, so they are relatively hard, even if they collide together, you will not have to live or die, there is a situation where who broke whom, and there is almost no encounter in actual maintenance.
What happens if the gear is damaged? I have encountered a situation where a car could not catch fire because a tooth on the flywheel was missing, and only one tooth was lost. It may be that it is not very easy to ignite, and there is a lack of a tooth, when the place where the tooth is rotated and cannot be meshed with the starter, the starter will produce idling, resulting in the flywheel can not rotate, so that it cannot ignite. So why this tooth will fall out is unknown, it may be caused by the second ignition without extinguishing, and there may also be quality problems.
Although collisions generally do not result in a lose-lose situation, it should not be done often, and if there are frequent collisions, it must have an impact on their lifespan. If there are multiple collisions with the same tooth, it is very likely to fall off and be damaged. Whether the flywheel or starter is replaced, the price is relatively high. Therefore, in order to avoid these unnecessary losses, you must check whether the ignition is turned off before starting the vehicle every time, especially if the vehicle stops to do something after driving for a period of time, you should be cautious when igniting. Just look at the tachometer, there is a speed means that it has been started, no speed is not started.
Nowadays, many cars have also added a function to prevent secondary starting, and if the ignition is ignited without stalling, the starter will not work. This greatly improves the prevention of misoperation, avoids the potential injury caused by secondary ignition, and cars with this function do not have to worry. Many cars are started with one button, and the vehicle with one button start will not have this situation, because when the fire is ignited, the start switch will be turned off again, and there will be no secondary ignition.