What are the principles and methods of automotive electrical equipment maintenance?

What are the principles and methods of automotive electrical equipment? Automobile electrical equipment, his principle is to communicate a positive power supply and negative circuit, there is a signal line detection method, there is a backward method, some Zhengzhou maintenance from insurance income, some from the electrical appliances to start maintenance.

Replace the broken parts, that is, repair.

1. The composition of the automotive electrical system The electrical system equipped with modern automobiles can be roughly summarized and divided into the following four parts according to their uses: 1. Power supply systemThe power supply system includes batteries, generators and regulators. The first two work in parallel, the generator is the main power source, and the battery is the auxiliary power source.

The generator is equipped with a regulator to automatically adjust the output voltage of the generator to keep it stable when the generator speed increases. 2 Electrical systemThe electrical system on the car can be roughly divided into the following categories: (1) Starting system:

The main part is the starter, whose task is to start the engine. (2) Ignition system: It is an integral part of the gasoline engine, including all components of the electronic ignition system or the traditional ignition system.

Its task is to generate a high-voltage electric spark and ignite the combustible mixture in the cylinders in the order in which the engine works. (3) Lighting system: including all kinds of lights inside and outside the car and the lights necessary to ensure safe driving at night, among which the previous lights are the most important.

Anti-aircraft lighting has also been added to military vehicles. (4) Signal system: including electric horn, buzzer, flasher and various signal lights, etc., which are mainly used to ensure the necessary signals for safe driving.

5) Electronic control system: mainly refers to the device controlled by the microcomputer, including: electronic control ignition device, electronic control fuel injection device, electronic control anti-lock braking device, electronic control automatic transmission device, etc., which are used to improve the dynamics, economy, safety, exhaust purification and control automation performance of the car.

6) Auxiliary electrical appliances: including electric wipers, low-temperature starting preheating devices, air conditioners, cassette recorders, cigarette lighters, anti-theft devices, glass lifters, seat adjusters, etc. There is a growing trend of auxiliary electrical appliances, mainly in terms of comfort, entertainment, and safety.

3. The detection system includes various detection instruments such as voltmeter, ammeter, water temperature gauge, oil pressure gauge, fuel gauge, vehicle speed odometer, engine tachometer and various alarm lights, which are used to monitor the working conditions of the engine and other devices. 4. Power distribution systemThe power distribution system includes junction boxes, circuit switches, safety devices, plug-in parts and wires, etc., to ensure the reliability and safety of line work. Hope!!

The contents of automobile electrical repair include:

1. Maintenance of automobile electrical system;

2. Maintenance of automotive electrical equipment;

3. Maintenance of automotive electrical equipment lines;

4. Maintenance and maintenance of automotive electrical system.

The automotive electrical system includes:

Repair and maintenance of automotive power supply system, starting system, ignition system, lighting and signal system, automotive instrument system, and auxiliary electrical system.

Automotive electrical equipment includes:

Repair and maintenance of automobile batteries, generators, starters, lights, instrument signals, horns, audio, circuits, etc.

Automobile electrical wiring includes:

Repair and maintenance of plugs, wirings, power cords, tie wires, tie points, etc. of automotive electrical appliances.

Automotive electrical system care and maintenance includes:

The maintenance of automobile electrical circuits includes cleaning, lubrication, fastening, and repair.

Dynamo. The maintenance of automobile generator is an important part of automobile electrical appliances, and its function is two parts: to supply the needs of each electricity part; Charge the battery. In order to maintain the constant power generation state of the generator while the car is running, it is necessary to do a good job of maintenance work frequently.

Starter. When the starter is working, the current is large, the speed is high, and it should be noted that the starter starts for no more than 5 seconds each time, and the starter should be turned on twice in a row with an interval of 15s to make the battery recover.

If there are three consecutive starts, it should be stopped for 15 minutes on the basis of inspection and discharge failure. When starting in winter or at low temperatures, corresponding measures should be taken, such as battery insulation to ensure that the battery has sufficient starting capacity, and pre-lubrication of the hand-cranked engine.

Our common car repairs are: engine system failures (oil and water leakage, abnormal noise, unstable idling, poor acceleration, etc.); Faults caused by short or open circuits in electrical wiring; malfunction of electronic components of computer control systems (car computers, sensors); failure of the transmission system of the car (gearbox, differential); Failure of the chassis system (brakes, abnormal noises), failure of the body stability system (the car deviates, the steering wheel is not correct, the steering wheel is shaking); safety system failures (airbags, ABS, etc.); The car has a big problem with fuel consumption; sheet metal painting; Air conditioning system (no cooling, no heating); entertainment systems (radios, CD players, etc.); Body anti-theft (door lock and remote control, anti-theft alarm) and so on.

The content includes the basic knowledge of automotive electrical system, automotive power supply system, starting system, ignition system, lighting and signal, automotive instrument D meter, auxiliary electrical appliances, characteristics of automotive electrical equipment circuits, and reading methods.

Automotive electrical equipment includes: automotive power supply system, starting system, ignition system, lighting and signal system, automotive instrument system, auxiliary electrical system. The circuit and maintenance of automotive electrical equipment mainly includes the maintenance and maintenance of electrical equipment and circuit systems.

Failure of the engine system (oil and water leakage, abnormal noise, unstable idling, poor acceleration, etc.); Faults caused by short or open circuits in electrical wiring; malfunction of electronic components of computer control systems (car computers, sensors); failure of the transmission system of the car (gearbox, differential); Undercarriage failures (brakes, squeaks, etc.).

Hello! Repair batteries, generators, starters, spark plugs, lights, meters, auxiliary appliances, air conditioners, circuit analysis!

1. Battery overhaul.

2. Overhaul of charging system.

3. Overhaul of starting system.

4. Overhaul of ignition system.

5. Automobile light warning signal system.

6. Automobile instrument system.

7. Car assistance and entertainment systems.

8. Automobile air conditioning appliances, etc.

Is the main maintenance content of the car electrical maintenance, he must be**change maintenance**, you put this car, he will change a place after he leaves, or the patient is the engine, it is mainly the engine or ask is bad is other places, and or if it is an electrical bar, he is either the heart or a scorpion, generally those places **mixed to go**, so it depends on the end of the ** these places.

The maintenance content of automobile electrical appliances is mainly for the repair, maintenance and modification of auxiliary electrical equipment on the car.

The main maintenance of automobile electrical, well, basically like lights, wiring, motor batteries.

Hello! The principle of automobile maintenance adheres to the principle of prevention first, regular inspection, and mandatory maintenance. The purpose of car maintenance is to keep the car clean and tidy, find and eliminate hidden faults in time, and prevent early damage to the vehicle, so as to meet the following requirements:

The vehicle is often in good technical condition and ready to go.

Under the condition of reasonable use, it will not stop due to damage on the way, and affect driving safety due to mechanical accidents.

During operation, the consumption of fuel, lubricating materials, accessories and tires is reduced.

The technical condition of each assembly should be balanced as much as possible to extend the mileage between vehicle overhauls.

Reduce vehicle noise and environmental pollution from emitted pollutants.

Vehicle maintenance must be carried out on a regular basis in accordance with the specified mileage or interval time, that is, the maintenance operation must be carried out in strict accordance with the prescribed cycle, and the operation should not be extended or carried out in advance. The provisions of the operation items and operation cycle of maintenance at all levels should be comprehensively considered according to the structural performance of the vehicle, the conditions of use, the law of failure, the quality of accessories and the economic effect. With the change of operating conditions and the adoption of new processes and technologies, the maintenance project and maintenance cycle can be adjusted in time after being approved by the road transport management agency.

Vehicle maintenance operations mainly include cleaning, inspection, replenishment, lubrication, fastening, adjustment, etc. Therefore, except for the failure of the main assembly and the dismantling (disassembly for inspection, measurement, treatment, etc.), the vehicle maintenance operation shall not dismantle the assembly, so as not to waste manpower and material resources, prolong the operation time, and affect the normal technical condition of the assembly or components.

If I can help you! Hope!!

Automobile repair should follow the principle of simple and then complex, easy and difficult, the principle of thinking before acting, the principle of first ripening and then birth, the principle of first up and then down, first outside and then inside, the principle of preparation before use, the principle of priority, repair in the front, replacement in the back.

Auto repair includes auto circuit overhaul, engine overhaul, sheet metal painting, headlight upgrade, new energy vehicle repair, auto beauty and so on. Automobile repair is a general term for the repair or replacement of damaged parts and assemblies in order to eliminate faults and hidden dangers, restore the technical condition or working capacity specified in the automobile assembly. According to the relevant regulations of our country, there are two types of automobile maintenance, a class of automobile maintenance enterprises, engaged in automobile overhaul and assembly repair, and can also be engaged in automobile maintenance, automobile minor repair and automobile special repair.

Automobile circuit maintenance can generally be divided into the following parts. Power supply. It mainly includes batteries, generators and their voltage regulators.

The power supply is 12V low-voltage DC. In the case of automotive electrical repair, it includes the repair of electrical circuits, light bulbs, center console dashboards and other electrical items. The electrical system of automobile electromechanical maintenance mainly includes lighting system, electronic ignition system, weak current multi-electric and audio system.

What are the main responsibilities of an automotive electrician? Inspection and maintenance of automotive electronic control system, including generator, starter, ignition system, engine electronic control unit, computer detection, accident car or fire car wiring, etc. Automobile electromechanical maintenance is mainly based on the maintenance of non-electrical appliances and on-board electrical appliances and circuits, that is, mechanical repair includes mechanical repair and electrician.

There is a difference between them and car mechanics, even if they are all in the electromechanical industry.

1. Familiar with circuit diagrams, able to understand the structure of automobile circuits. 2 Understand the symbols, functions and functions of various electrical accessories. 3. Determine the location of the fault point in the circuit by the fault phenomenon.

This paper first expounds the structure of the electrical system of the automobile, then analyzes the causes of the failure of the electrical equipment and the engine, and finally proposes the daily maintenance measures of the automobile. In order to provide help for the repair of automotive electrical equipment. Why do you need to measure, because if the power is off during the measurement, it is equivalent to the principle of power-off reset for the body computer, and interested friends can test and compare it separately, and the results of the power-off connection multimeter and the connection of the multimeter and then separating the negative electrode line test are different, especially some small leakage tests, this method is more useful.

Jiefang brand trucks, imported Toyota, Blue Bird car electrical equipment, a comprehensive and systematic introduction of its structure, principle, fault diagnosis methods and maintenance operation technology. Electrical equipment maintenance generally includes: daily patrol inspection, regular inspection and testing, planned maintenance, regular maintenance, etc.

Problems that should be paid attention to in the ignition system First of all, in the process of maintenance, it is important to ensure that the electronic ignition system is well laid.

The electrical equipment I know is lights, signal lights, medical disks, alarms, car batteries, generators, and car engines.

The understanding is not particularly comprehensive, and the maintenance is not particularly understood, so I don't know how to maintain.

I only know some basic maintenance tools, and I don't know much about car maintenance, and I don't know much about maintenance.

The engine of the automobile occasionally idles during normal operation, and the engine control center needs to be used to transmit the switch signal to accurately judge the idle speed of the engine. If there is a low potential input problem in the engine idle switch signal when the engine is working, the idle contact of the car engine will be closed, and in order to maintain the normal operation of the car engine, the idle control system can be started to adjust the engine state. The failure of the signal circuit of the automobile engine idle switch will affect the judgment results of the automobile engine control center, affect the accuracy of the judgment, and the given work instructions are also prone to errors, resulting in abnormal engine operation.

The engine of the car starts the headlamp, the air conditioner and so on all need electricity, while consuming the power of the battery, the operation of the car engine also needs to charge the battery, maintain its power, and ensure the normal use of the battery. In the process of long-term use of the battery, sometimes the battery loss fault occurs, which leads to the abnormality of the automobile power system and affects the normal use of the car. The abnormal operation of the automobile starter is one of the typical types of faults in the electrical system of automobiles, and it is also a fault that has a great impact on the overall quality and structure of the vehicle.

The main causes of abnormal failure of the starter are the electromagnetic switch problem of the starter, the quality defect of the engine itself, etc.

When the engine is idling, the engine heats up, sends a signal to the temperature sensor, and takes cooling measures such as reducing the amount of fuel injected and using cooling water. When cooling the car engine, if the cold room temperature sensor fails, the water temperature is too high to alarm, which does not help to reduce the temperature in time, and it is easy to cause the engine temperature to be too high. There are many ways to diagnose and repair automotive electrical systems.

The most commonly used and easiest method is intuitive observation. Fault diagnosis and maintenance personnel need to combine many years of work experience. Preliminary diagnosis of electrical system faults, determination of fault scope and type, problem solving and visual observation method require high experience and technical level of diagnosis and maintenance personnel, and many years of work experience are required.

The visual observation method is generally used to diagnose more obvious electrical system faults, such as the smell of line burning and the abnormal sound of line joints when descending. However, for some faults that are deep and belong to the faults of the internal structural components of the system, the type of fault cannot be accurately judged by the intuitive observation method, and the equipment detection method is often used when diagnosing and repairing the fault of the automobile electrical system, combined with the intuitive observation method, and the fault diagnosis and maintenance method is formulated. The commonly used testing equipment is mainly fault diagnosis instrument, exhaust gas analysis equipment, oscilloscope, etc.

At this stage, with the continuous development of automobile manufacturing process, most automobiles are equipped with fault diagnosis intelligent systems in the design and manufacturing, which can assist in fault diagnosis.