First of all, if there is only one person sitting in the car, the car will indeed tilt. Some friends may have seen someone get on the bus at the roadside, and the whole car will collapse and sink after getting on the bus. This situation is only that the suspension spring of the car is compressed.
Southwest Jiaotong University has a master's thesis "Dynamic Analysis and Improved Design of Automobile Elastic Suspension System". Suspension system is a kind of elastic connection device in automobile, which is used to buffer and absorb the energy between connected parts and transmit the force and torque between them.
To put it simply: suspension can buffer and absorb the force transmitted by the car to the wheel, and the force transmitted by the wheel to the car is the same. Therefore, the car will not be bumpy all the time when it crosses the bad road, and it will be solved under the car. In the general family car suspension, the buffer element is a steel spring.
Friends who have repaired cars may have seen it. When the car is lifted, there is a big and thick spring on each wheel suspension. For example, a suspended spring, similar to a spring buried in Simmons. So, aren't people sleepy when they lie in bed? But after people get up, isn't the bed flat again Something like that
Springs used in suspension have long service life.
Then some friends may think, since it is a spring, won't it deform after a long time? Just like a pressed ballpoint pen, "click click" is pressed to the back, and "click click" cannot be played out, which is boring. The long-term failure of the spring is technically called "metal fatigue".
Tianjin University has a master's thesis "Fatigue Life Analysis and Optimal Design of Automobile Suspension Components". Fatigue refers to the phenomenon that materials or parts are suddenly brittle after a period of time under the action of dynamic load. When we were young, the metal pieces we played with didn't always "arch Mao Mao" from side to side. We turned around here, turned around, and pinched the back and broke it. This is the principle of metal fatigue.
The bearing capacity of suspension spring is very strong.
The suspension spring used in the car is for the elephant. It may not be able to move, let alone sit on it. The spiral spring steel used in cars is generally 55 Si and 2 Mn.
According to the national standard GB/T 1222-20 16 spring steel, the tensile strength and yield strength of 60 Si and 2 Mn spring steel should not be lower than 1570MPa. As we said before, 1200MPa is equivalent to pushing eight Passats on your finger, which is very powerful. Suspension springs are really as thick as fingers. So: let alone 1 person, even if it is full of five people, this weight is not a fraction of 1 Passat, and naturally it will not cause particularly obvious damage to the spring.
Suspension springs have a long life.
The spring is not only strong in itself, but also has a long life. Zhongtian Iron and Steel Group published an article in Modern Metallurgy, which mentioned this point in the fatigue test and fracture analysis of 60 Si 2 Mn steel spring. When the finished spring is subjected to fatigue test, it should meet the technical requirements of not breaking for 200,000 times.
Well, the influence of a person sitting on the spring is very, very small, and the life of the spring is very, very long. Don't worry that a person sitting and driving will overturn the car. Besides, the suspension spring is actually many times stronger than Simmons.
A good model is equipped with air suspension and will not tilt.
Most of the "spring steel" mentioned just now is used by some family cars. More upscale passenger cars, trucks, or luxury cars are already using air suspension, so they will not tilt.
In Hunan University's master thesis "Research on the Control System of Electronic Control Air Suspension for Advanced Passenger Cars", the description of air suspension is as follows. The air spring used in the air suspension is filled with high-pressure gas, which can control the height of the car body.
The air spring for air suspension is simply a balloon, but it is super strong and can support a whole car. The height adjustment function includes an automatic level control device to prevent the car from tilting. This paper describes this function as follows: when the number of passengers and goods on the car changes, the height of the car body can be controlled to keep a certain value to keep the car body level.
For example, if there is a person sitting in the driver's seat, the left front wheel may be slightly inflated. You put two boxes of apples in the trunk, and then 1 box of wine. It is possible that the inflation of the rear two wheels will be relatively high, and both are automatically controlled by the computer. We don't have to worry at all, and we can't feel it.
Driving alone has a greater psychological impact on people.
Often driving alone, you should be more worried about your mentality. For example, when you see a beautiful girl or a handsome boy sitting in the co-pilot of someone else's car on the road, you will inevitably feel a little jealous.
Master thesis of Hunan Normal University, The Influence of Gratitude on Jealousy: The Interlocking Mediating Role of Social Support and Self-efficacy. Definition of jealousy: jealousy is an inherent and automatic social behavior of human beings. It is a complex mixed emotion that individuals show when they realize and yearn for some advantage that others have, but fail to get it, which will damage their self-esteem.
Driving alone will not affect the car, but it will affect the mentality.
Generally speaking, driving alone often, with only one driver in the car for a long time, will not affect the car at all. It's just that driving alone often may lead to jealousy, which will inevitably be seen on the road and affect your mentality.
Many people think that 300,000 cars are not good cars.
There is also a jealous situation: the car you drive is cheaper, and when you see that other people's cars are expensive, you will also be jealous of driving Mercedes-Benz, BMW and Audi cars with a price of 300,000 to 400,000.