Second, car maintenance. The purpose of car body maintenance is to keep the car young forever, while the purpose of car interior maintenance is to make the car travel hundreds of thousands of kilometers without major repairs and ensure that the car is in the best technical condition. It mainly includes: maintenance of lubrication system, fuel system, cooling system, braking system and carburetor (injector).
Third, the body is refurbished. Such as diagnosis and treatment of deep scratches, repair of multi-material bumper, repair of hub (cover) hard injury, renovation of leather and chemical fiber materials, renovation of engine color and so on. Automobile maintenance is divided into two categories: regular maintenance and irregular maintenance. Regular maintenance includes: daily maintenance, primary maintenance and secondary maintenance; Non-scheduled maintenance includes running-in maintenance and seasonal maintenance. The main work of car maintenance is nothing more than cleaning, inspection, fastening, adjustment and lubrication. However, with the development of science and technology and automobile industry, various advanced technologies, mainly computers, are widely used in automobiles, which makes the future automobiles gradually intelligent, so the contents of automobile maintenance are endowed with new connotations.
Automobile maintenance is a complex work with high technical content, which is difficult to be completed by drivers themselves and needs to be carried out in automobile maintenance enterprises. At present, there are still some automobile maintenance enterprises in China that stick to the traditional maintenance concept, the maintenance equipment and tools are outdated and backward, and the maintenance methods and means are still the same, which can not meet the needs of modern development. In addition, the service quality of some maintenance enterprises is worrying. In order to reap huge profits, "black-box operation", the old ones are filled with new ones, the inferior ones are filled with good ones, and the maintenance and replacement fees are exorbitant. Therefore, drivers and friends must be reminded that when maintaining their cars, they must choose a maintenance company with strong technical force, reliable service quality and good reputation, instead of not maintaining their cars in order to save trouble and money, so as not to lose big because of small.
How to maintain the car? There are also many car maintenance products on the market now.
In the hot summer, the technical conditions of automobiles, especially engines, have changed due to high temperature, heavy rainfall, heavy dust and strong radiant heat. In order to meet the needs of normal operation of the vehicle, before the arrival of summer, some necessary seasonal inspections and adjustments should be made to the whole vehicle in combination with secondary maintenance:
1, strengthen the use and maintenance of cooling system;
A, pay attention to check the sealing condition of the cooling system, the tightness of the fan belt, the sensitivity of the thermostat and the cooling water temperature, etc. , and pay attention to adequate cooling water.
B, remove the cooling system, including radiator, and scale attached to the water jacket. Because scale has poor thermal conductivity, it will seriously affect heat dissipation.
2. Replace the engine with high-viscosity brand lubricating oil, and shorten the oil change cycle appropriately; Transmission and differential should be replaced with summer thick gear oil; Replace the hub bearing with grease with high dropping point, and carry out inspection and maintenance according to the specified period; Brake fluid may produce air resistance at high temperature, so brake fluid with high boiling point should be used. (not less than 1 15~ 120℃).
3. Adjust the carburetor. Properly reduce the oil level in the float chamber, reduce the oil output of the main nozzle and valve, and appropriately delay the ignition advance angle.
4. Adjustment and maintenance of the charging system. When driving in summer, the battery will be overcharged, the electrolyte will evaporate quickly, and the electrode pads will be easily damaged. Therefore, it is necessary to regularly check the liquid level height and electrolyte specific gravity of the battery (the electrolyte specific gravity is smaller than that in winter), and often add distilled water to the battery; Keep the vent hole on the fuel filler cover unobstructed, otherwise the air pressure inside the battery will increase and the shell will burst; The generator regulator should also be adjusted appropriately to reduce the charging current of the generator.
5. Prevent bursting. The gasoline with corresponding octane number should be selected according to the compression ratio of the engine. If the gasoline grade is lower than the required grade, a knock limiter can be installed. Keep the engine at normal working temperature; Properly delay the ignition advance angle to enrich the mixture.
6. Prevent gas resistance of oil supply system. In summer, the gas resistance of the oil supply system is due to the fact that after the oil supply system is heated, some light fractions in gasoline volatilize into vapor, which exists in gasoline pipelines and gasoline pumps, increasing the flow resistance of gasoline. Coupled with the influence of high temperature in summer, it is easy to cause insufficient or even interruption of engine oil supply, which makes the car unable to drive or difficult to start. Specific measures to prevent gas resistance are:
First, when air resistance occurs during driving, use a damp cloth to cool the gasoline pump or drive the car to the shade to cool down.
B, change the installation position of diaphragm gasoline pump, from the original place near the rear side of the exhaust pipe to a well-ventilated place in front of the exhaust pipe, and install heat insulation board between the gasoline pump and the exhaust pipe.
C, an old one-way oil valve spring can be installed on the inlet and outlet valves of the gasoline pump respectively to improve the gas resistance of the gasoline pump.
D, try to improve or choose a new gasoline pump (such as the original 262 gasoline pump gas resistance is not ideal, can choose 266 gasoline pump, install transistor electric gasoline pump, not limited by the installation location), to prevent gas resistance.
7. Prevent puncture while driving. When the temperature is high in summer, the temperature in the tire will rise, and the internal air pressure will increase, which is easy to puncture. Therefore, when the car is driving in summer, it should pay more attention to the temperature and air pressure of the tire and check it frequently to maintain the specified air pressure standard. When driving at hot noon, you should appropriately slow down the driving speed, stop in the shade every 40~50 kilometers, and continue driving after the tire temperature drops. Don't deflate or pour cold water on the way to reduce the temperature, so as not to accelerate the tire damage, so that your car can be better maintained, used more comfortably and for a longer time. Please take care of her often.