The power of smart travel, decoding Dongfeng Nissan’s super powerful engine

    The month of May has just passed, and a lot of big news has been made - there is a disturbing ransomware virus, there is a colorful Belt and Road Initiative, and the successful test flight of the domestically produced large aircraft C919 is definitely the most exciting one among them.

But as soon as the domestically produced large aircraft took to the skies, many doubts followed. The most important thing is that the engine of this aircraft is still not domestically produced.

The engine is known as the crown jewel of the industry. There is a wise saying in the aviation field: as long as the thrust is enough, a brick can reach the sky. This shows the importance of the engine. The same is true for cars. The most important thing about whether a car is good or not depends on whether the engine is powerful.

Speaking of this, I have to mention Dongfeng Nissan, which is very powerful in the engine field.

Spray technology

——This technology is only used by BMW except Dongfeng Nissan

    Dongfeng Nissan has just launched a black technology - cylinder bore injection technology.

At the beginning of this year, Dongfeng Nissan introduced Nissan's global third-generation engine. The HR series naturally aspirated engine was introduced to the market for the first time. This series of engines uses a variety of the latest technologies to improve engine emissions and fuel consumption performance and will be equipped in new small SUVs. Enter the car model. Among them, cylinder hole injection technology is included.

Cylinder hole injection is not easy to understand literally. Let's start with the structure of the cylinder - as we all know, automobile engine cylinders are generally made of iron or aluminum alloy.

In order to prevent the cylinder from being in direct contact with high-temperature and high-pressure gas and causing wear, there is a component such as the internal combustion engine cylinder liner. In order to further reduce wear and improve service life, the inner surface of the cylinder liner will also be coated with silicon nitride ceramic coating.

    Cylinder bore injection technology is a landmark advancement in the field of engine manufacturing. This technology achieves a cylinder liner-less design, eliminating the traditional thick cast iron cylinder liner and replacing it with a layer of alloy sprayed film only 0.2 mm thick with core technology.

    Even though the thermal spray film is only as thick as a hair, its durability is stronger than the thick cylinder liner. Moreover, it has many benefits - because it is thin, it has excellent thermal conductivity. Compared with the traditional cast iron cylinder liner, the sprayed cylinder bore can reduce the cylinder bore wall temperature by 15℃~20℃, improving engine performance; secondly, the sprayed layer mirror surface The processing technology makes it form a mirror-like smooth surface, thereby achieving ultra-low friction loss and increasing durability; finally, the cylinder liner was replaced with a coating, which not only reduced the size, but also reduced the weight by 2kg. Cylinder hole injection technology, the fuel saving effect can reach 2.34%.

    Melting spray technology is still a relatively new manufacturing process. For Nissan, early melt spraying technology was applied to the GT-R; apart from Nissan, only the BMW B38 and B48 engines in China use metal melt spraying technology for the inner cylinder wall. Even looking around the world, only the Ford Mustang (or the top version of the Shelby GT350) has this technology.

    Dongfeng Nissan is so willful in using such cutting-edge technology on a "grocery cart".

"Blacker black technology"

Variable compression ratio engines are coming!

    Dongfeng Nissan's advantages in the engine field do not stop there.

    The VQ series engine has long been known to everyone. It is the only engine in the world that has won the "Global Top Ten Engines" award for 14 consecutive years. The application of advanced technologies such as NICS variable air intake control system can effectively improve combustion efficiency and achieve better fuel economy while improving power performance. Currently, Dongfeng Nissan is promoting the application of this mature and advanced engine to more main models.

    Dongfeng Nissan will also introduce a true flagship upgraded version early next year - MR-20DDT. This product integrates the most advanced technologies in the current engine field, in addition to cylinder bore injection, e-VTC, dual injection system, turbocharger In addition to technologies such as compression and integrated exhaust pipes, it especially adopts VCR (variable compression ratio technology) that perfectly matches DST (turbocharging technology).

    The application of these technologies has enabled a qualitative leap in the performance of this engine. Fuel consumption, power performance and emissions will reach unprecedented levels. This engine can reach the level of the once famous VQ3 at the 2.0-liter displacement level of a traditional engine. 5 power and torque level, even higher performance, and emission levels that are comparable to hybrid models.

    In the field of new energy vehicles, Nissan is also a leader in the industry.

    Dongfeng Nissan's battery pack design, development and manufacturing technology for electric vehicles is in an industry-leading position with high safety, high reliability and high environmental protection. Dongfeng Nissan is also very knowledgeable in hybrid power. It has launched a hybrid version of Loulan. At the same time, it has gained reputation and sales; and by 2018, Dongfeng Nissan will be the first among joint venture car companies to introduce mass-produced electric vehicles into China, achieving truly "zero" emissions.

epilogue

Just like a top student needs to be good at all subjects. The engine is only one of the strengths of "Technology Nissan".

Nissan has been exploring the unknown and is committed to researching various intelligent technologies. As Nissan's most important strategic market in the world, as well as a beneficiary and practitioner of Nissan's most cutting-edge technology, Dongfeng Nissan released the "i³ Plan" at the end of last year, which is a layout from the three dimensions of smart mobility technology, smart manufacturing quality, and smart experience. future. Among them, Zhixing Technology, Dongfeng Nissan will take "zero collision, zero emission, zero distance" as its ultimate goal. In addition to the new generation of power, Dongfeng Nissan also continues to make efforts in the fields of intelligent driving and intelligent interconnection.

In the future, what other “black technologies” will Dongfeng Nissan have?

Just wait and see!