What are the automobile diagnosis technologies?

Automobile diagnosis technology is a method and means to test the performance and check the faults of automobiles by using instruments and equipment. Common automobile diagnosis technologies include manual experience diagnosis, simple instrument diagnosis, precision detection diagnosis, artificial intelligence diagnosis and so on. Automobile diagnosis usually includes visual inspection, safety component inspection, dynamic inspection, exhaust and noise inspection, etc. Next, let's look at Bian Xiao. What are the automobile diagnosis technologies?

1, artificial experience diagnosis

Before 1950s, the automobile structure was relatively simple, with few electrical equipment, and the fault diagnosis could be completed by manual experience. At present, the artificial experience diagnosis method is still very effective for the diagnosis of some complex faults.

2. Simple instrument diagnosis

From the early 1950s to the late 1970s, due to the increasingly complex automobile structure, electrical equipment gradually increased. Therefore, in the process of automobile fault diagnosis, it is necessary to test related assemblies and parts with the help of vacuum gauge, pressure gauge, multimeter and oscilloscope to determine their technical status.

3. Accurate detection and diagnosis

From the early 1980s to the early 1990s, due to the increasing electronization of automobiles, the dynamic random faults and functional faults of control systems are increasing. Various precision detection methods with computer technology as the core are widely used, which greatly improves the detection level and accuracy of vehicle state and the accuracy of fault diagnosis. For example, various engine analyzers, computer detectors, and various electronic testing instruments are all necessary instruments for precision testing.

4, artificial intelligence diagnosis

Since 1990s, the number of electronic equipment in automobiles has been increasing day by day, and the models and control technologies are also different. Therefore, fault diagnosis becomes a key problem in automobile maintenance. Various systems developed by applying the theory and technology of artificial intelligence and modern information technology will be helpful for fault diagnosis and problem solving.

Common diagnostic contents of automobile diagnosis

1, visual inspection

Check whether the engine, automobile bottom, electrical system, steering device and various pedal mechanisms are normal; Whether the liquid level height is appropriate; Whether there is oil leakage, water leakage, air leakage and electric leakage. This kind of inspection is basically based on visual inspection.

2. Inspection of related safety components

Inspection of automobile braking performance, steering performance, headlight, front wheel positioning and wheel dynamic balance. The main testing equipment includes brake test bench, front wheel positioning tester, sideslip test bench, lighting tester and wheel dynamic balance testing equipment.

3. Dynamic inspection

Mainly use the engine performance analyzer to check the technical conditions of the engine ignition system and oil supply system; The wear degree of some parts was measured by oil analyzer. The dynamic performance of the automobile is measured by the chassis comprehensive test bench, including the acceleration and sliding performance of the automobile, the output power of the driving wheel and so on.

4, exhaust and noise inspection

The contents of harmful substances such as carbon monoxide, carbon dioxide, hydrocarbons and nitrogen oxides in engine exhaust and the concentration of diesel exhaust are mainly determined by gas analyzer. Measuring automobile noise with sound level meter.