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Goodbye, high displacement engine

Issuing time:2021-09-28 10:36

I don't know when it started, but car companies have become increasingly stingy with the installation of large displacement engines. Many D-class cars have started using 2.0T engines. With the continuous promotion of "carbon neutrality", it seems that large displacement engines are one step closer to saying goodbye to us. Recently, according to foreign media reports, General Motors has cancelled the ever powerful 6.2L V8 turbocharged engine, which was installed in the 2019 Corvette C7 ZR1 model and only serves the Corvette. Its high power of 563kW, but now, this powerful engine has officially declared "goodbye".

In fact, the power of a large displacement engine may not necessarily be higher than that of a lower displacement turbocharged engine, but the calmness brought by a large displacement is not comparable to that of a turbocharged machine. This is also why some veteran car enthusiasts are inevitably excited when they mention large displacement engine models. However, this era should no longer belong to large displacement engines.

What is more noteworthy is that perhaps the gradual decline of large displacement engines reflects the trend of engine extinction. According to a power system engineer from a well-known domestic brand, the development of engines is almost close to the ceiling version, and parameters such as thermal efficiency have reached a level that is difficult to improve. In the trend of new energy vehicles, perhaps only small displacement engines have room for survival, and may become an auxiliary part of automotive power in the future, empowering extended range electric vehicles and hybrid vehicles.

The era of small and large car displacements is gone forever

Large displacement engines have always been an important source of confidence for ultra luxury car models, but in recent years, a large number of ultra luxury car models equipped with large displacement engines have successively exited the historical stage.

In mid-2020, Bentley officially announced the discontinuation of the 6.75L V8 engine, which had a glorious history of 61 years. Bentley launched the Mulsanne 6.75 Edition special edition to commemorate the discontinuation of this V8 engine; In 2018, Audi released the next-generation 6.0T W12 engine version of the A8 model, while the current Audi A8L adopts a 3.0T+48V mild hybrid system across the entire range... In addition, General Motors has cancelled the ever powerful 6.2L V8 turbocharged engine, and many large displacement engines and models equipped with large displacement engines have disappeared.

Not only ultra luxury car models, but also general luxury, high-end and even ordinary car models are gradually becoming obsessed with small displacement engines. From the Mercedes Benz 1.3T GLB to the Nissan 1.5T three cylinder Qashqai, countless models have become obsessed with small displacement engines, and even the 2.0T engine can be seen in many D-class models. It seems that in this era, the 2.0T is already considered a relatively large displacement among car models for sale.

In fact, compared to models equipped with large displacement engines, models equipped with small displacement engines have more advantages. From the perspective of manufacturing costs, high displacement models have more complex powertrain structures and are much more expensive in terms of vehicle design and manufacturing costs. In terms of usage costs, for the same model, high displacement models have higher fuel consumption and higher operating costs than low displacement models, while maintenance costs also increase accordingly. And these require consumers to pay for them, which is also the reason why high displacement models have always been a nostalgic toy for a few people.

In addition, under the vision of "carbon neutrality", emission regulations are becoming increasingly stringent, and domestic credit policies have always been a headache for car companies, coupled with the rise of new energy vehicles. The overall environment is no longer conducive to the reckless sale of high displacement car models in the market. Firstly, they cannot achieve high sales volume, and secondly, they cannot reduce costs and bring higher profits to car companies. It is only natural for them to be abandoned.

Will the ultimate goal of the engine be power assistance?

Large displacement engines are fading away, while small displacement engines may also struggle to maintain their current status. Data shows that the sales volume of new energy passenger vehicles in August was 307000 units, a year-on-year increase of 206.5%. Among them, the sales volume of pure electric passenger vehicles was 251000 units, a year-on-year increase of 214.8%; The sales of plug-in hybrid passenger cars reached 56000 units, a year-on-year increase of 173.8%. In August, the penetration rate of new energy passenger vehicles reached 19.8%, setting a new historical high.

The rapid development of new energy vehicles seems to be saying to car engines: you should step down now. Of course, from the current market perspective, fuel powered vehicles still hold a huge market share, and the exit of fuel powered vehicles from the historical stage is not an overnight thing. But it cannot be denied that the ceiling of engine development seems to have been reached.

A power system engineer from a well-known domestic brand told the editor of "Daoge Talks about Cars" that it is basically difficult to improve the thermal efficiency of car engines to around 40%, and the technology has reached its ceiling, with little potential for further development. In the context of rapid development of new energy vehicles, the traditional research and development of engines is even more lacking in necessity.

In fact, many car companies have already decided to halt the development of fuel powered models or engines. Previously, Volkswagen announced that it would no longer develop fuel powered models after 2026; Honda announces decision to stop developing new diesel engines; The news that Audi will stop developing gasoline or diesel engines in the first quarter of this year has also caused a stir... Car companies seem to be killing off gasoline models or engines.

So, is the engine really saying goodbye to us? The above-mentioned engineer told the editor of "Daoge Talks about Cars" that perhaps only small displacement engines have survival space, and may become an auxiliary part of car power in the future, empowering extended range electric vehicles and hybrid vehicles. It is worth noting that many car companies are already doing this, and the results are good. For example, Ideal Auto has been selling its 1.2T three cylinder range extender on the Ideal ONE for several months, and BYD's Snapdragon plug-in hybrid 1.5L engine has been included in the DM-i model, causing a shortage of demand for multiple hybrid models from BYD... Perhaps the former mainstay (engine) will really become an auxiliary in the future.

The wheels of history are rolling forward, and the fuel engines that have accompanied the development of the automotive industry for over a hundred years may really be about to exit the historical stage, just like the steam engines used in ships and other industries in the past. Of course, this may not necessarily be a bad thing for consumers and the entire automotive industry, but the nostalgia for the roaring engine may only be seen in documentaries in the future.


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