Important experiments of science and engineering need data, important models of economics need demonstration, and liberal arts seem easy to write, but it takes a lot of time to study the literature, with high repetition rate and difficult to change. You are writing about a brand of automobile chassis. You need to find the basic information of this chassis and analyze the structure of the chassis slightly. Moreover, since the topic of your thesis is limited to one brand, the information you can use will be limited and it may be more complicated to write.
Maintenance of automobile chassis;
First, prevent the chassis from hitting the floor, because the chassis is the part closest to the ground except the tires. When there are big stones or potholes on the road surface, the chassis will be in close contact with these protrusions on the road surface, which is what we call mopping the floor. This situation is uncertain, so it is easy to damage the parts located in the chassis, such as the broken shell of the three-way catalyst, the cracking of the engine oil pan, the cracking of the gearbox shell or the deformation of the suspension system, which may bring fatal injuries to the vehicle. In view of this situation, the maintenance personnel in general 4S shops will suggest that you install engine guards on the car, or provide so-called "chassis armor" for chassis protection, so that even if the bottom is dragged, the guards will touch the ground first, which will not damage important parts, and can protect the chassis to a certain extent.
Second, anti-corrosion. Generally, new cars will be sprayed with anti-primer when they leave the factory. However, after the baking of the ground and the invasion of rain, acid rain or seawater, the oxidation of the paint surface will accelerate, and the parts of the chassis will rust and corrode, which will eventually lead to the loosening of the whole vehicle structure and bring security risks. If the chassis accidentally contacts with acidic liquid, clean the chassis with a large amount of fresh water or neutral cleaning agent as soon as possible to reduce its corrosion.