The combination of electronic technology and automobile technology forms a new technology-automobile electronic technology. With the improvement of automotive electronic technology, automotive electronization has reached a fairly high level. Automotive electronics technology has become a symbol of the development of a country's automobile industry. The function of suspension in automobile is to connect the car body and the wheels, support the wheels with proper rigidity, absorb the impact of the road surface, and improve the comfort and ride comfort of the vehicle. It can also stabilize the driving of the car and improve the handling. The ride comfort and handling stability of suspension are a pair of contradictory relations. Under the control of its electronic control device, the electronically controlled suspension can make dynamic adaptive adjustment according to the information received from the outside or the change of the state of the vehicle itself, that is, the electronically controlled suspension has no fixed suspension stiffness and damping coefficient. In this way, it can be adjusted automatically with the change of road conditions and the different requirements of driving needs, which fundamentally solves the contradiction between riding comfort and handling stability and improves the performance of the car.

First, the source of the theme

The topic "Structural control principle and maintenance of electronically controlled suspension system" comes from the graduation thesis topic published by Hubei Automobile Institute.

Second, the current situation at home and abroad

The utilization rate of electronically controlled suspension in foreign high-speed buses and luxury city buses is close to 100%, and the utilization rate of medium and heavy trucks and cars has exceeded 80%. Some luxury cars gradually take electronic control as the standard on the train, and it is more and more widely used in some special vehicles, such as instrument cars, ambulances, container transport vehicles and other vehicles that require high impact resistance. Compared with developed countries such as Europe and America, the research and application of automobile suspension technology in China is still in an obvious backward position. With the introduction of high-end bus manufacturing technology and the improvement of people's comfort requirements,

The national standard for passenger car classification requires the gradual application of electronically controlled suspension. At present, there are many companies with air suspension projects in China, but few companies really have the design, development and manufacture of electronically controlled suspension systems. Most domestic companies with agency nature but no actual design ability often have inherent shortcomings in technical links such as design matching. However, due to various reasons, most of these research results remain in theory, and the industrial conversion rate is very low. As early as 1950s, China began to study the electrically controlled spring, and 1957 Changchun Automobile Research Institute began to study the air suspension technology. Many related experts, scholars and university research institutions have done a lot of fruitful work for many years and achieved many important research results.

Third, the research content and comprehensive analysis

This topic mainly studies the structure, working principle, fault types and causes of electronically controlled suspension system.

Its maintenance method.

By consulting related books and online search materials, the main research contents of this topic are as follows:

(1) Overview of Electronic Control Suspension System

(2) Sensor of electronic suspension system

(3) Electronic control module of electronic control suspension system

(4) Fault diagnosis and detection of electronic control suspension system.