All aluminum engines are becoming more and more popular, but why does Volkswagen EA888 insist on not

The advantage of all-aluminum engine is light weight, fuel saving is achieved by reducing weight, in the same displacement of the engine, the use of aluminum block engine, can reduce the weight of about 20 kilograms, and the weight of the vehicle is reduced by 10%, and the fuel consumption can be reduced by 6% 8%. Due to the light specific gravity of aluminum, the structural strength per unit volume of aluminum is less than that of cast iron, so the volume of aluminum cylinder block is usually larger than that of cast iron, and it is difficult to achieve the compactness and small volume of cast iron cylinder block. The second is corrosion resistance and strength, aluminum is easy to chemically react with the water produced during combustion, therefore, the corrosion resistance is far less than that of cast iron cylinder blocks, especially for supercharged engines with higher temperature and pressure requirements.

From these, it can be seen that in fact, the advantages of all-aluminum engine for ordinary vehicles are not particularly obvious, because ordinary vehicles are to maintain daily travel, although the vehicle is light and can save fuel and speed up, but it is not suitable for Volkswagen brand models. <>

Why didn't the Volkswagen EA888 engine be replaced with an all-aluminum engine? Mine is not necessary, Volkswagen sales in the world are very good, but in China accounts for half of the world's sales, in the domestic auto market, Volkswagen mainly sells compact and medium-sized cars, of which the sedan is Lavida, Bora, Passat, Magotan-based, and SUV is based on Tiguan L and Tanyue and other models, the ** of these vehicles is about 10-300,000, it can be said that it is a relatively ordinary price area, after all, compared with ultra-luxury models, Volkswagen still has a large gap. In terms of engines, Volkswagen is mainly based on turbocharged engines, of course, there are also naturally aspirated engines, and turbocharged engines, it is the Volkswagen EA888 engine.

Volkswagen EA888 engine is a very good power, although when it was first listed, it had the problem of burning oil, but after the third generation of updated development, now Volkswagen turbocharged engine, it can be said that it is not worse than other joint venture engines on the market. Judging from the models carried, this engine is mainly installed in the Passat, Magotan, Phaion, Tiguan L, Tanyue and other mainstream medium and large cars, it can be said that it is the main force of the Volkswagen engine, the Volkswagen model is higher than the Japanese, Volkswagen EA888 is a greater attraction point, because its performance is much higher than the Volkswagen EA211, and the Volkswagen EA211 is an engine level that is difficult for many domestic brands to achieve. <>

There is no need to change the Volkswagen EA888 engine, because the advantages of this engine are obvious, and consumers will not buy it because the vehicle is equipped with this engine, but they all want to buy their own Volkswagen models equipped with this engine. There is also the engine can not be developed and manufactured casually, throughout the Volkswagen engine, in fact, there are not a few, because the engine is very complex, the design is quite simple, but in the factory commissioning, this is a very slow process, which is more expensive than the replacement model, the current Volkswagen EA888 engine is very popular, so there is no need for Volkswagen to waste money to change to an all-aluminum engine.

In the past, engines were cast iron, but nowadays, with the increasing use of aluminum in automobile structures, all-aluminum engines are becoming more popular. The all-aluminum engine is of great significance for the lightweight design and fuel economy of automobiles, and has also been favored by many automobile manufacturers. But there are two sides to everything, is an all-aluminum engine necessarily better than a cast iron engine?

Why does the Volkswagen EA888 keep checking the cast iron engine and not working, is it for cost reasons or something else? Today we will talk about whether the all-aluminum engine is good or not.

Cost control is necessary, the wool comes out of the sheep, first of all, the question I asked at the beginning of the article: Is an all-aluminum engine necessarily better than a cast iron engine? If you don't take into account the design cost, it must be that the all-aluminum engine is better, such as some luxury sports cars.

However, for the family car level of tens of thousands to more than 200,000 yuan, cost control is a very important indicator. Although aluminum is lighter, it is weaker, and some people say that a good aluminum alloy will be stronger than steel, and this is true. But the premise is that there is enough cost and technology to support it.

The cost of high-strength aluminum alloy is very high, so there will be a cylinder liner inlaid with cast iron in the all-aluminum cylinder block, which is a clever countermeasure. Even so, the extra cost of design process and coating is much larger, and if these homework is not done, the engine life will be much shorter. So from this point of view, it may not be a good thing that the Volkswagen EA888 does not use an all-aluminum engine.

In recent years, many car companies have pursued lightweight, and even we can see some 5W level cars on the market have also been replaced with all-aluminum engines. Some people say that this is a strategy for car companies to plan to scrap, shorten the service life of core components on the car, speed up the iteration of models, and shorten the replacement cycle. The definition of all-aluminum is vague, and the owner is careful to "change the concept" In fact, the definition of all-aluminum engine in today's market is very vague, like the all-aluminum cylinder block inlaid with cast iron cylinder liner mentioned above, which is also claimed to be an all-aluminum engine.

Whether it is true or not all-aluminum owners may not be able to understand clearly when buying a car, and in fact, they don't need to care too much. 、

The density of aluminum is small, so the material volume is larger, and the cost mentioned above needs to be added, that is, because aluminum is small in density, when it is necessary to ensure strength, the need for a larger volume of material also means a higher cost. Moreover, Volkswagen also has to install the engine on a small car, which is more natural and cannot be satisfied, and the internal design involves the whole body, and Volkswagen must have calculated this account.

In general, the Volkswagen EA888 does not use an all-aluminum design due to multiple considerations of cost and model design, and for ordinary consumers, there is no need to worry too much about the material of the engine. For a family car in this class, the material of the engine does not make special sense.

Volkswagen has its own technical expertise for cast iron EA888, which retains the advantages of cast iron while being as lightweight as possible. Cast iron engine has the advantages of stability, high temperature resistance, high pressure, wear resistance, easy forging, and low cost.

Because the public is still more confident in their own technology, they generally will not replace it.

All-aluminum engines are becoming more and more popular, but Volkswagen EA888 insists on using it because Volkswagen has its own unique design and processing technology for cast iron, which can make the engine as lightweight as possible while retaining the original advantages of cast iron.

The EA888 engine is not an all-aluminum engine, this engine uses an aluminum alloy cylinder head and a cast iron block. Although the weight of the cast iron block is higher, the cast iron block can withstand higher temperatures and pressures, so the reliability and durability of the cast iron block is better.

The EA888 engine is not an all-aluminum engine, this engine uses an aluminum alloy cylinder head and a cast iron block. Although the weight of the cast iron block is higher, the cast iron block can withstand higher temperatures and pressures, so the reliability and durability of the cast iron block is better.

It is precisely because of the use of cast iron cylinder blocks that Volkswagen's EA888 engine has such a high potential for modification.

The engine block with a high potential for modification can withstand higher temperatures and pressures, so that the block can withstand higher power.

If the strength of the cylinder block is not enough, it is easy to cause the engine to burst after increasing the power.

The EA888 engine is a turbocharged in-cylinder direct injection engine, and the EA888 engine has been developed into the third generation of products.

The third-generation EA888 engine has an exhaust manifold integrated into the cylinder head, which improves the thermal efficiency of the engine and improves the power of the engine.

The third-generation EA888 engine can be seen on many models, such as the Magotan Passat, Golf GTI, Golf R, Audi S3 and so on.

The EA888 engine is mated to a dual-clutch transmission.

The dual-clutch gearbox has a fast shift speed and high transmission efficiency, which can give the driver a driving feeling of clean shifting.

The dual-clutch transmission is a product developed based on a manual transmission, which is similar in structure to a manual transmission.

Volkswagen's EA888 engine is not a wither-resistant all-aluminum EA888 engine is not an all-aluminum engine. This engine has an aluminum alloy cylinder head and a cast iron block. Although the weight of the cast iron block is higher, the cast iron block can withstand higher temperatures and pressures, so the reliability and durability of the cast iron block is better.

It is precisely because of the use of a cast iron block that Volkswagen's EA888 engine has such a high potential for modification. The engine block with high potential for modification can withstand higher temperatures and pressures, and only then can the block withstand higher power. If the strength of the cylinder block is not enough, it is easy to cause the engine cylinder after increasing the power.

The EA888 engine is a turbo Zengshenchun pressure in-cylinder direct injection engine, and the EA888 engine has been developed to the third generation. The third-generation EA888 engine has an exhaust manifold integrated into the cylinder head. This design can improve the thermal efficiency and power of the engine.

The third-generation EA888 engine can be seen on many models, such as the Magotan Passat, Golf GTI, Golf R, Audi S3 and so on. The EA888 engine is mated to a dual-clutch transmission. The dual-clutch gearbox has a fast shift speed and high transmission efficiency.

This gearbox gives the driver a feeling of neat gear shifting. The dual-clutch transmission is a product developed on the basis of the manual transmission. The structure of such a gearbox is similar to that of a manual gearbox.

Millions of car purchase subsidies.

Advantages: In-cylinder direct injection: Mercedes-Benz has also had in-cylinder direct injection, but only Volkswagen and Audi are proficient in using in-cylinder Mofengchun direct injection technology.

In the past, the Volkswagen engine first mixed oil and gas in the intake pipe and then injected into the engine for combustion, but the new generation Volkswagen EA888 is very precise to inject fuel directly into the engine, so that the gasoline can be fully burned and obtain higher power. At the same time, it has a low blind speed output, saving 15% of fuel.

2.The third-generation EA888 engine adopts a forward and reverse intake manifold layout, which reduces the length of the exhaust pipe and makes the overall structure more compact.

3.Water-cooled turbocharging technology, the engine's turbocharging and exhaust pipe are integrated design, which shortens the volume of parts and improves the stability of the car.

4.The silent timing chain is designed with Ki, and the small partner does not need to check and replace the belt frequently, and the mute effect is better.

5.The position of the new balance shaft is more reasonable, and the centrifugal force generated by the crankshaft and chain drive is exactly the opposite of the centrifugal force generated by the crankshaft, so that a little vibration can be filtered out during the driving process, and the drive is smoother.

Disadvantages: Not only the Volkswagen series, but also the Audi series, the engine basically has the same disadvantage: burning engine oil. Although the new generation EA888 has improved somewhat, the burning of engine oil has not been greatly improved.

Millions of car purchase subsidies.

Volkswagen EA888 engine is powerful, low noise, very fuel-efficient, high engine integration, low fuel consumption; Because of its strong modification ability, it is deeply liked by the public and keeps up with the trend of the times.

The third-generation EA888 features a reverse arrangement with the intake manifold at the front and the exhaust manifold at the rear, which is unchanged from the second-generation model. The biggest feature of this layout is that it is compact and has a short exhaust line, but it also has problems such as weak power output at low speeds, but with the popularization of variable valve technology in the engine, the gap between the upright layout and the reverse layout is becoming more and more obvious. However, for Volkswagen cars, which currently generally adopt a platform-based design, a more compact structure is favored.

Because this model is not suitable for an all-aluminum engine. But the all-aluminum engine is quieter, the fuel consumption is lower, and the manufacturing technology is also very advanced.

I think it's because the Volkswagen EA888 engine sells Jingzhao technology is very mature, the failure rate is very low, and the fuel consumption is also very low.

Because the quality of Volkswagen's engine is very stable, coupled with the relatively mature technology. So Volkswagen did not replace the engine.