Why many direct injection engines, turbocharged engines are recommended to change spark plugs for 20

The material used in the spark plug has a decisive impact on the replacement cycle, the mainstream spark plug on the market has copper core, nickel alloy core, platinum core, iridium core, copper core is recommended to be replaced every 2-30,000 kilometers, the cycle of nickel alloy is slightly longer than that of copper core, it can be replaced at about 4-60,000 kilometers, and the spark plug metal characteristics of iridium and platinum core are relatively stable, and the oxidation resistance is good, so the service life will be relatively long, and the platinum core is recommended to be replaced every 80,000 kilometers; The iridium core is recommended to be replaced every 100,000 kilometers.

There is a difference between the requirements of the spark plug for the naturally aspirated engine and the turbocharged engine, not that there is a special spark plug for turbocharging, but there are precautions when choosing. Because the liter power of the turbocharged engine is larger than that of the naturally aspirated engine of the same displacement, the instantaneous temperature and pressure of the oil-gas mixture are also greater, so the relative wear is more serious, and it is necessary to use the first spark plug to extend the service life.

It seems that there is no need to change the spark plug for 20,000 kilometers for the direct injection engine, and it is generally enough to change the spark plug once every 30,000 kilometers at the earliest.

It should be said that this is completely over-maintenance, there is no need for normal times, replace the spark plug after 20,000 kilometers, and replace the spark plug for about 3 to 40,000 kilometers.

Hello, direct injection and turbocharging have slightly higher requirements for spark plugs than others, but 20,000 kilometers to replace spark plugs is relatively early.

The requirements for spark plugs for direct injection in the cylinder are higher.

The working environment of the spark plug in the combustion chamber is relatively harsh.

Turbocharged. Engine and naturally aspirated engine spark plugs.

General, but it is not recommended that the engine spark plug of the large turbocharger is mainly used for turbocharging, engines with high compression ratio, and ordinary self-aspirated engine spark plugs, which are mainly used for engines with low performance or low compression ratio. An engine converts a certain form of energy into mechanical energy.

of the machine. It has little function as a chemical energy transfer of liquids or gases.

After combustion, it is converted into heat energy, and then the heat energy is converted into mechanical energy through expansion and output power. The power of the car comes from the engine. The engine is the heart of the car, providing power for the walking of the car, and the power, economy and environmental protection of the car.

To put it simply, the engine is an energy conversion mechanism, that is, the thermal energy of gasoline (diesel) is converted into mechanical energy by pushing the piston to work when the combustion gas expands in the sealed cylinder, which is the most basic principle of the engine. All the structure of the engine is for the energy conversion service, although the engine has gone through more than 100 years of history with the car, whether it is in the design, manufacturing, technology or performance, control has been greatly improved, its basic principle is still unchanged, this is a rich creative era, those engine designers, continue to integrate the latest technology with the engine, the engine into a complex mechatronics.

products, so that the engine performance to reach the degree of near-perfection, the world's famous automobile manufacturers will also take the performance of the engine as a competitive highlight, first, the automobile engine.

role. The automobile engine is a device that provides power for the car, is the heart of the car, and is an energy conversion device, which is to convert the thermal energy of gasoline (diesel) into mechanical energy by expanding the gas after combustion in the sealed cylinder, pushing the piston to do work. According to different power**, automobile engines can be divided into diesel engines, gasoline engines, electric vehicle motors, and hybrids.

Second, the classification of automobile engines.

1. According to the working mode of the air intake system, it can be divided into four types: naturally aspirated, turbocharged, mechanically supercharged and double supercharged.

2. According to the piston movement mode, it can be divided into two types: reciprocating piston internal combustion engine and rotary piston engine.

3. According to the cylinder arrangement type, it is divided into in-line engine, V-type engine, W-type engine and horizontally opposed engine.

4. According to the number of cylinders, it can be divided into single-cylinder engine and multi-cylinder engine. Modern cars mostly use three-cylinder, four-cylinder, six-cylinder, and eight-cylinder engines.

5. According to different cooling methods, it can be divided into water-cooled engine and air-cooled engine. The water-cooled engine cools evenly, works reliably, and has a good cooling effect, and is widely used in modern automotive engines.

6. According to the number of strokes, it can be divided into four-stroke internal combustion engine and two-stroke internal combustion engine. Four-stroke internal combustion dissipators are widely used in automobile engines.

The function of the automobile spark plug is to ignite the mixture of the combustion chamber through the electric spark generated by the ignition coil and the electric spark generated by the ignition coil, and cooperate with the ignition system and the oil supply system to make the engine work. Spark plugs are divided into oaks according to their calorific value, including cold type and hot type; According to the material of the electrode, there are nickel alloy rackets, iridium alloys, platinum, etc.

Generally speaking, the design life of nickel alloy spark plugs is 20,000 kilometers, and this metal is widely used in low-end spark plugs. The design life of iridium alloy is 3-40,000 km; Platinum spark plugs have a design life of 60,000 km. In the usual maintenance process, attention should be paid to the working condition of the spark plug, if there is carbon and oil on the spark plug, it can be cleaned with gasoline or detergent and dried with compressed air, not scraped with a knife or burned with gasoline to prevent damage to the electrode and porcelain insulator; Generally, when the spark plug fails, it will lead to poor engine work, such as difficult starting, unstable idling, poor acceleration, urgent refueling and tempering, excessive exhaust gas, and increased fuel consumption. So why do the spark plugs used in the direct injection engine have to be replaced for 20,000 kilometers?

The reason is that the engine load of the direct injection engine itself is higher, the cylinder pressure is relatively large, the combustion temperature is high, and compared with the naturally aspirated engine, it will accelerate the ablatation of the spark plug electrode and reduce the service life of the spark plug, so we must regularly check and replace the spark plug, and we cannot ignore the inspection of the ignition system because of the small number of kilometers. Since the replacement of spark plugs is relatively simple, many car owners replace them after buying accessories online, but they must make sure that the parts model is the same as the original car. Nowadays, there are more and more direct injection turbocharged engines in the cylinder, and the phenomenon of melting and breaking due to the wrong type (calorific value) of the replaced spark plug is increasing.

Summary. The spark plug of the engine with direct injection in the cylinder is relatively easy to produce carbon deposits, so the frequency of replacement must be higher than that of the ordinary engine in the later stage, and the engine compression ratio of the turbine voltage gas is relatively high, and the heat is relatively high, which is easy to lead to spark plug ablation, so it is also relatively early to replace the spark plug.

Why many direct injection engines, turbocharged engines are recommended to change spark plugs for 20,000 kilometers

Dear, this question is up to me, it takes a little time to type, please be patient, thank you!

The spark plug of the engine with direct injection in the cylinder shot is more prone to carbon deposit, so the frequency of replacement is definitely higher than that of the ordinary engine in the later stage, and the engine compression ratio of the turbine voltage gas attack is relatively high, and the heat is relatively high, which is easy to lead to spark plug ablation, so it is also relatively early to replace the spark plug.

Summary. Dear car owners, it is generally recommended to replace the spark plug of the engine with direct injection in the cylinder every 30,000 kilometers, but it also depends on the specific situation. If there is no rust found after 30,000 kilometers of dismantling and inspection, it can be postponed for replacement; If the car does not reach 30,000 kilometers and has idle shaking, it is recommended to replace it in advance.

Dear car owners, Qi Yinpin is generally recommended to replace the spark plug of the engine with direct injection in the cylinder every 30,000 kilometers, but it also depends on the specific situation. If there is no rust found after 30,000 kilometers of dismantling and inspection, it can be postponed for replacement; If the car does not reach 30,000 kilometers and has idle shaking, it is recommended to replace it in advance.

QX80 engine.

Replace the words. It is recommended to replace the parts of the original car. No need to mess up the brand.

If it's convenient, you can tell me about the specific model.

Infiniti QX80

Eight-cylinder engine.

Now the engine is idling or driving normally and no problems are found.

How many kilometers have you been dear?

10,000 km. It's time for you to change this kilometer, dear, okay, thank you!

No thanks, replace it in advance, dear. This belongs to the category of maintenance. Don't wait until it's damaged to replace it.

The replacement cycle of turbocharged spark plugs is linked to the material of the spark plugs, if it is an ordinary spark plug, it is usually replaced once every 40,000 kilometers, and if it is a platinum spark family head plug, it can be replaced at 80,000 kilometers.

The impact of the spark plug material on the replacement cycle is decisive, and the turbocharged engine power is greater than that of the naturally aspirated engine, so it is more suitable to use the spark plug, most of the turbocharged engines use the spark plug is nickel alloy, and the more advanced is platinum, the stability of the metal characteristics of the two is relatively high, and the oxidation function is relatively good, the service life is relatively long, the service life of nickel alloy is 4-60,000 kilometers, The life span of platinum is 80,000 kilometers.