Engine inspection and maintenance tips.
1, engine overheating prevention
The ambient temperature is high, and the engine is easy to overheat. The inspection and maintenance ofthe engine cooling system should be strengthened, and the scale in the water tank, water jacket and thedebris embedded between the radiator chips should be removed in time. Carefully check the thermostat, water pump, fan performance, damage should be repaired in time, and pay attention to adjust the tension of the fan belt; Add cooling water in time.
2. Oil check
Oil can play the role of lubrication, cooling, sealing and so on. Before checking the oil, the vehicle should be parked on the flat road, and the vehicle should stop for more than 10 minutes before the inspection, and
the vehicle must be heated again after the night before it is accurate.
To detect the amount of oil, first wipe the dipstick and insert it back, insert it in the end to accurately measure the amount of oil. Generally, there will be a scale indication at the end of the dipstick, respectively, there are upper and lower limits, and the normal state is in between.
To determine whether the oil is deteriorated, you need to use a piece of white paper, drop the oil on it to observe the cleanliness, if there are metal impurities, dark color and pungent smell, it means that it needs to be replaced.
3. Check brake fluid
Brake fluid is also commonly known as brake oil, which provides energy transfer, heat dissipation, corrosion prevention and lubrication for the brake system. In fact, the replacement cycle of brake fluid is relatively long, and you only need to see if the liquid level is in the normal position (that is, the position between the upper limit and the lower limit).
4, coolant check
The coolant keeps the engine operating at normal temperatures. Like brake fluid, the replacement cycle of coolant is also relatively long, and you only need to pay attention to the amount of oil. It is important to pay attention to whether the hose is damaged.
In addition, the color of the coolant will also reflect the deterioration or not, but different coolant colors are different, and the main judgment of the ordinary car is also difficult, requiring professional equipment. Therefore, if the amount of oil and pipeline is normal, the water temperature is high when the vehicle is running, it is necessary to go to the 4S shop or maintenance shop for detection.
5, power steering oil detection
The power steering oil helps reduce the wear of the steering pump and also reduces the steering force of the steering wheel, so if you find that the direction has become heavier than before, there may be a problem with the power steering oil. But electric power steering cars, there is no need to test.
Power steering oil is generally replaced every 2 years 40,000 kilometers, and the maintenance manual is also detailed. The detection method is actually similar to oil, pay attention to the oil level mark on the dipstick. And the oil is also to take the white paper to color, if there is a black situation should be replaced in time.
6, glass water inspection
The inspection of glass water is relatively simple, ensuring that the liquid quantity does not exceed the upper limit scale line, and it is found that less is added in time, and there is no lower limit. It should be noted that the glass water in the rear window of some models should be filled independently.
2. Briefly describe the maintenance content and steps of the automobile engine computer control system?
The engine electronic control system mainly includes electronic fuel injection system, electronic ignition system and other auxiliary control systems. Each has the following effects:
1, Fuel injection control – Electronic Fuel injection system (EFI) In the electronic fuel injection system, the fuel injection control is the most basic and most important control content, the electronic control unit (ECU) mainly determines the basic fuel injection amount according to the intake volume, and then corrects the fuel injection amount according to other sensors (such as coolant temperature sensor, throttle position sensor, etc.), so that the engine can obtain the best concentration under various operating conditions Mixed gas, thereby improving the engine’s power, economy and emissions. In addition to fuel injection control, the electronic fuel injection system also includes injection timing control, fuel cut-off control and fuel pump control.
2, ignition control – Electronic controlled ignition system (ESA) The most basic function of the electronic controlled ignition system is ignition advance Angle control. The system judges the operating conditions and operating conditions of the engine according to the relevant sensor signals, chooses the most ideal ignition advance Angle, ignites the mixture, and thus improves the combustion process of the engine, so as to achieve the purpose of improving the engine power, economy and reducing emission pollution. In addition, the electronically controlled ignition system also has power on time control and deflagration control functions.
3, automobile engine failure maintenance and detection
The common faults of the automobile engine are: 1, the engine at various speeds, the muffler is issued a rhythmic “tuk” sound, and slightly black smoke; 2, the speed can not rise to the high speed, the car driving power is obviously insufficient; 3, the engine is not easy to start; It is not easy to speed up after starting (boredom), the car is weak, and the carburetor is sometimes tempered when the car accelerates rapidly, and even the engine is easy to stall, and the engine temperature is higher; 4, the engine in idle conditions slow acceleration is good, and rapid acceleration, the engine speed can not rise, sometimes carburetor tempering; 5, the engine temperature is normal, working well at low, medium and high speed, after relaxing the accelerator pedal, there is too high speed or idling instability or even flameout; 6, the steering wheel shakes at high speed; 7. Run off while driving. “Engine” is a machine that can convert other forms of energy into mechanical energy, including internal combustion engines (gasoline engines, etc.), external combustion engines (Stirling engines, steam engines, etc.), electric motors, etc.
4, car engine maintenance technology?
The car engine is the machine that provides power for the car and is the heart of the car, affecting the power, economy and environmental protection of the car, and more related to the personal safety of the driver and passengers. An engine is a machine that converts a certain type of energy into mechanical energy, and its role is to convert the chemical energy of liquid or gas combustion into thermal energy after combustion, and then convert the thermal energy into mechanical energy through expansion and output power. The layout of the engine has a great influence on the performance of the car. For cars, the layout of the engine can be simply divided into front, middle and rear three. At present, most models on the market are front-engined, and mid-mounted and rear-mounted engines are only used in a few performance sports cars. For the car engine, we may not understand too much, the following Xiaobian network to introduce you to the car engine maintenance technology, the system composition of the car engine, the classification of the car engine, the car engine cleaning steps, the car engine cleaning precautions.
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Post time: May-18-2024