But sometimes I don't notice, do I? Or this road is really not easy to walk, so you need protective measures such as engine guard plate and chassis armor.
What damage will the chassis suffer from frequent bad roads?
In order to avoid damaging the chassis, we must first know: where may be injured.
For example, when a girlfriend is angry, she will ask "What's wrong with you?" Then ask, "How do you compensate?" Right?
There is a paper in "Automobile and Safety" magazine, and the knowledge of automobile chassis maintenance says that there are two main reasons for the damage of automobile chassis.
Drag it to the end
1 type is called "bottom drag", including foreign body impact.
Especially when the road conditions are poor, there will be potholes on the road from time to time, or a "kang" big stone, "gong" sound and so on.
If there are no protective measures for the chassis, the chassis parts may be damaged: the shell of the three-way catalyst is cracked, the engine oil pan is cracked, the gearbox shell is cracked or the suspension system is deformed.
corrode
Another kind of damage is corrosion.
In rainy and snowy weather, in addition to the corrosion of rain itself, the soil on the rotten road surface and the snow melting agent used on the road in winter will aggravate this corrosion.
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How to avoid chassis damage? Good driving habits can avoid some situations that drag the bottom.
Let me talk about it first: how to avoid dragging the bottom?
Many friends may think that only cars need to worry about this problem. I drive an SUV with a high chassis, so there is no problem.
But in fact, the chassis height of the car is not so different from that of the small SUV that is now selling well.
Let me give you an example. For example, the minimum ground clearance of 202 1 Corolla 1.2T Pioneer Edition is 152mm, which is 15 cm. The ground clearance of Audi Q3 is only 152mm, which is the same height.
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The SUV is large, mostly in the upper part, and the chassis is still low. Therefore, at this time, driving habits are more important. Good driving habits can avoid many situations that may damage the chassis.
There is a paper in "Automobile and Safety" magazine, which says in "Driving Skills on Potted Roads" that bad roads are mainly divided into mild bad roads and severe bad roads.
A slightly rotten road refers to a road with some potholes.
Pay a little attention when driving, don't get too close to the car. The rocks and dust rolled up by the car in front will not only damage the chassis, but also block our driver's view.
If it is a bad road, such as mud, pull it over there. Before driving, you can consider raising your seat a little and leaning back straight to see more clearly.
Generally, this road is relatively high on both sides and in the middle. At this time, you should learn to observe the wheel tracks on the road.
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If the wheel tracks have been pressed deeply, we should consider avoiding these tracks to prevent them from hitting the chassis, because they are just two sunken tire tracks. Or trapped in a pit, the same is true.
This is like saying: In winter, when you see a few people in front of you, they slipped "hey" and "hey", and you know that there may be ice on the road ahead.
You just go around and don't slip with them, okay?
Chassis corrosion can be simply prevented by cleaning.
The easiest way to avoid chassis corrosion is to clean the chassis.
There is a paper in "Driving Park" magazine, "Talking about chassis rust prevention", saying that high-pressure water jet can clean the original sediment on the chassis.
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If there is too much sludge on the chassis, clean it again with degreasing cleaning agent.
In addition, when cleaning yourself, be careful not to use alkaline cleaners, such as washing powder. Otherwise, it will affect the antirust effect of the chassis.
This is like: we should wash our hands after eating crayfish, and if we can't wash them clean, we should use hand sanitizer.
But isn't it much more convenient for you to put on gloves and pick them after eating? It is useless to wear 1 layer, but wear 2 layers; The second floor is useless. Wear the third floor.
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There are also some comprehensive protection measures. Similarly, the car chassis has something similar to gloves, which can prevent the bottom from being dragged and corrosion.
If you often take a bad road, you can also see how well the chassis protection of the car itself is done after cleaning the chassis.
If you have a thin layer of paint, or none at all, then the chassis protection I will talk about later can be considered.
Type 1 is called: engine lower guard plate.
There is a paper in the magazine "Automobile Maintenance", which mentioned the discussion about the practicability of installing the engine bottom guard.
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When the chassis is impacted, the fender will disperse the impact force and then impact the oil pan to protect the oil pan.
However, the installation of fender is not omnipotent. If the impact force exceeds the bearing limit of the guard plate, the oil pan will still break.
Moreover, after installing the fender, the ground clearance of the car may be shortened by 20 to 50 mm. Pay special attention when driving: it turns out that you didn't knock your ass when you drove there, but you did it after installing this thing.
The second type is chassis encapsulation. The flexible polyester material is sprayed on the chassis to achieve the effects of corrosion prevention, rust prevention and collision prevention.
It's like: we send an electronic product with a sponge or something on it, which will explode when pinched. I really like to pinch it.
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The principle of chassis armor and chassis molding is similar, but the effect will be better.
There is a paper in Electromechanical Information magazine, which mentioned the armor and plastic packaging of automobile chassis protection measures.
Chassis armor is made of rubber and polyester materials, which not only has the function of plastic sealing of chassis, but also has the function of sound insulation and noise reduction.
In addition, the construction thickness is also different: the chassis plastic is only 2mm, the chassis armor is generally around 4mm, and some areas may reach more than 5 mm.
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Of course, the price of chassis armor is also slightly more expensive.
There is a reference on the car maintenance technology online: the price of chassis plastic packaging is generally 2, 300 yuan; Chassis armor, cheap 2300, expensive thousands.
We talked about this before, but it is not sold in China at present.
When driving on bad roads, the methods to avoid chassis injury can be summarized as follows: In order to minimize the risk of chassis injury, when driving on bad roads, try to keep a certain distance from the car in front, and the seat will be raised and straightened, so that the line of sight will be better.
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At the same time, pay attention to the traces of driving on the road and avoid concave places.
If you often take a bad road, it is still recommended to protect the chassis. Engine fender, chassis sealant and chassis armor can all be seen, which is effective.