Why does fuel consumption increase after more kilometers? Should old cars be like this?

Many people will have that experience. The longer the car is, the greater the fuel consumption will be, especially for cars with more kilometers, and the fuel consumption will expand significantly. Some people think that the old car consumes more fuel and everything is normal, so they don't do inspection and maintenance. In fact, this is also wrong, if the car has no obvious common faults, such as accelerated fatigue, engine oil burning, noise and so on. Only when the fuel consumption increases, the car is definitely not very good, but it can still be repaired after maintenance. The higher travel cost is the fuel cost, and the expansion of fuel consumption will increase a lot of car maintenance costs, so even the old car should be repaired even if the fuel consumption increases.

1. Clean up the carbon deposits in each area. The problem of carbon deposition in old cars is very harmful. Basically, every car has carbon deposition unless it is removed on time from the car. Carbon deposition will either cause poor air intake or poor atomization of automobile gasoline. In short, automobile gasoline can't be completely ignited, and doing the same job needs to consume a lot of automobile gasoline and increase fuel consumption. The first thing to do is to clean up the carbon deposits in old cars. Carefully remove carbon deposits from the top of piston rod, electronic throttle, air intake system and fuel injector. If there is a lot of carbon deposit, it is best to remove it. There is not much carbon deposit, and the hanging infusion bottle can be cleaned without disassembly.

After cleaning up, you must run fast, which is also very core. Because many of the cleaned carbon particles have not been completely discharged, some of them are about to fall, but they have not yet fallen, so they must be cleaned by a large cyclone before they can be cleaned. Otherwise, the carbon deposit will stick to the original place after hardening, and the cleaning effect is not good.

2. Disassembly and replacement of automobile spark plugs. If there is nothing abnormal in the car, the spark plug of the car will not attract people's attention. Even if its function is reduced, it is not damaged, and it will not feel abnormal if it is used again. Automobile gasoline is ignited by the automobile spark plug in the hydraulic cylinder, and the ignition time is particularly critical, so the highest efficiency of automobile gasoline cannot be stimulated too early or too late.

The ignition ability of automobile spark plug is reduced, which will lead to late ignition and should be ignited when reciprocating to the bottom dead center. However, due to the low ignition kinetic energy, it will not be ignited, which will consume a lot of power and cannot be used for work. Just as we push an object with our hands, we can use force when our arms are half deformed, and the energy will be much less when our arms are almost straight. Therefore, automobile spark plugs are also one of the key points to be inspected.

3. Basic maintenance was not completed in time. After buying a new car, most people can maintain it on time. When the car is old, maintenance is not so important. If the maintenance period is delayed, things that cannot be replaced will not be replaced. Dirty automobile oil, air filter and gasoline filter will harm fuel consumption. When the automobile oil is dirty, the friction resistance increases, which not only harms the fuel consumption, but also enlarges the harm. The air filter is dirty, the friction resistance of the air inlet increases, and the air inlet is not smooth, resulting in incomplete incineration. Dirty gasoline filter will reduce steam pressure, and insufficient working pressure of oil pump will also lead to incomplete incineration. Therefore, basic maintenance is also very important, and both new and used cars need to be done on time.

4. Some sensors are degraded, such as oxygen sensor and water temperature sensor. If the data signals of these two sensors are inaccurate, it will also affect fuel consumption. The oxygen sensor can bring an important data signal of gasoline and diesel oil regulation, and the computer can adjust the fuel injection quantity to the best state according to this data signal. If the data signal is inaccurate, the fuel injection quantity will not reach the best condition, which will lead to incomplete incineration. If the temperature data signal guaranteed by the water temperature sensor is too low, the computer will pump more and add rich mixture to make the car reach all normal temperatures, so the fuel consumption will be higher. These two sensors must be tested by computer and analyzed by data flow to confirm whether they are damaged, so they must be checked by professional technicians.