[YesAuto Engine Technology] In January, Michigan, which has just entered 2015, is experiencing the coldest season of the year. High winds mixed with blizzards and temperatures around minus 20 degrees even make people wonder whether spring will come again. On the i94 speedway leading to downtown Detroit, various vehicles roared by in the wind and snow, leaving only the unforgettable exhaust sound of the V8 engine. Most of them are already in their old age, and like this automobile city that has experienced great ups and downs, what is left is only the former glory. I know that many people have a special feeling for the American large-displacement V8, but how many of the new cars that have rolled off the production line in Detroit can continue this feeling? What kind of products will the American auto giants seeking revival use to conquer the world again? In the COBO center, the main venue of the 2015 North American Auto Show, I tried to find answers to the questions through the latest powertrains displayed by the two giants GM and Ford.
● GM Group: The trend and sentiment are at the same time
-Cadillac 3.6L V6 twin turbocharged engine
I believe that domestic friends are no strangers to Cadillac ATS. This “3 Series Challenger” from the United States is equipped with a four-cylinder 2.0T engine with excellent performance, so it is full of confidence in terms of power. However, the story is not over yet. Cadillac obviously has another “playmate” for BMW's latest high-performance mid-size car M3/M4, which is ATS-V. Like the 2.0T on the ATS, Cadillac has only one requirement for this V6T engine: it completely suppresses BMW in terms of data.
This 3.6L V6 direct-injection twin-turbocharged engine is actually not a complete “newcomer”. Before ATS-V appeared, a 3.6L V6T engine code-named LF3 used to make the CTS V-Sport model sold in the North American market at 4.6 Accelerate from standstill to 100km/h within seconds. On the ATS-V, the power parameters of the upgraded LF4 engine have been refreshed again. The maximum power of 461Ps (339kW) and the maximum torque of 603N·m make this high performance The 0-60mph (96km/h) acceleration result of the medium-sized car is only 3.9 seconds, which is the same as the M4; the top speed can reach 185mph (298km/h), while the top speed of the opponent M4 is limited to 155mph (249km/h) by the electronic system. .
|BMW M3||Cadillac ATS-V|
|Number of cylinders/arrangement form||In-line 6 cylinders||V-shaped 6-cylinder|
|Air intake method||Twin turbo||Twin turbo|
|Maximum power||431Ps (317kW)/5500-7300rpm||461Ps (339kW)/5750rpm|
|0-60mph (96km/h) acceleration time||3.9 seconds (M-DCT, US version)||3.9 seconds|
|Maximum speed||Electronic speed limit 155mph (249km/h)||185mph (298km/h)|
As the latest member of Cadillac's high-performance family, ATS-V with a “big heart” is clearly ready to compete head-on with the benchmark products of the same level, M3/M4. In addition, it can be seen that in this level of models, Cadillac is not prepared to use a larger displacement V8 engine like another German rival Mercedes-Benz AMG, so in this level of “horsepower arms race”, C 63 AMG still dominates with the “monster-class” M178 V8T engine. The advantages.
-Cadillac 6.2L V8 supercharged engine
Unlike the ATS-V, which has begun to consider the miniaturization of the powertrain, the CTS-V, which was newly unveiled at this North American Auto Show, clearly represents the full strength and ambition of Cadillac's high-performance department. At the new car launch event, the president of Johan de Nysschen (Johan de Nysschen), who entered Cadillac in 2014, could not hide his pride: “Media friends from Europe, I am sorry to inform you that the new CTS-V is equipped with It is the most powerful V8 engine in its class, and its parameters fully exceed the BMW M5 and Mercedes-Benz E 63 AMG!”
The previous CTS has not competed head-on with the 5 series and E-class cars, but adopted a market strategy of “bigger than the 3 series and cheaper than the 5 series”. With the birth of the ATS car series, Cadillac officially pushed the CTS to the position of direct dialogue with the German luxury brand medium and large cars. Its high-performance version of the model CTS-V is no longer obscured, and directly locks its competitors to M5 and E. 63 AMG, and completely suppressed opponents in terms of power parameters. In order to achieve this goal, Cadillac invited the strongest V8 engine in the group. The LT4 engine equipped with the 2015 Corvette Z06 is naturally the best choice: a 6.2L cylinder with a maximum power exceeding 649Ps (477kW). Direct injection supercharged OHV engine.
Mercedes-Benz E 63 AMG
|Air intake method||Twin turbo||Twin turbo||Supercharged|
|Gas distribution structure||
Four valves per cylinder
Four valves per cylinder
Two valves per cylinder
(Optional competitive components)
678N·m/1500-6000rpm; (optional competitive components)
|0-60mph (96km/h) acceleration time||
4.2 seconds (M-DCT);
4.1 seconds (M-DCT,
Optional competitive components)
4.2 seconds/3.7 seconds
(Rear drive/four-wheel drive);
3.6 seconds (S-Model, four-wheel drive)
Electronic speed limit
Electronic speed limit
The previous generation of CTS-V used to be the first four-door model to score 8 points in the New North. What kind of performance the new model with increased power will do is definitely something to look forward to. However, in this age of advocating “energy saving and emission reduction”, are these large-displacement V8 OHV engines of GM a bit “against the sky”? In fact, these American V8 OHVs today have undergone many “modernization” improvements, such as all-aluminum cylinder blocks, in-cylinder direct injection, cylinder cut-off, and variable valve timing, etc. The fuel efficiency and economy are not as unbearable as people think. At the same time, the OHV structure makes the engine more compact, which can bring excellent power density (note: power density simply means to release the same power, the smaller the engine size, the higher the power density). However, it is precisely because of the OHV and the two-valve intake structure that it will soon encounter bottlenecks in the optimization of fuel consumption and combustion efficiency. In other words, this type of engine is developed in a global environment of energy saving and emission reduction. The potential is not great. In this regard, Cadillac President John De Nichen said at the launch site of the new generation of CTS-V: “We do already have a V6 engine with excellent performance, but this does not mean that we will be on top of the CTS-V. Give up the V8. Because in our performance flagship model, the driving experience of the V8 engine is irreplaceable, and it also symbolizes our tradition.”
● Ford Group: Synchronize the world's popularity
At this North American Auto Show, Ford also introduced a number of blockbuster new products, including the high-performance Ford GT that can tease the fascinating car and the new generation of F-150 SVT Raptor. Unlike General Motors, after the baptism of the bankruptcy crisis, Ford has moved closer to Europe in product development. In the past few years, it has “liquidated” local models such as the 500 and the US version of the Focus, and introduced the globally unified version of the Mondeo (Fusion) and Fox, and unswervingly miniaturized and supercharged the powertrain of its models. It seems that within the Ford Group, the importance of the word “feelings” is far less important than in line with international standards, and at this North American Auto Show, we also saw their new EcoBoost engines deployed in the global market.
-Ford 2.3L inline four-cylinder turbocharged engine
Not long ago, when the Chinese called the V6 version of the Mustang a “muscle car”, perhaps it was impossible to imagine that Ford would launch a Mustang with only four cylinders. In history, the four-cylinder turbocharged engine is obviously not the first time to have a relationship with the Mustang, but when people have become accustomed to seeing the Mustang as a representative of American large displacement, Ford is ready to empty the engine compartment. The empty new models are sold to every corner of the world.
Although the “feelings” are no longer there, this four-cylinder engine has not caused criticism in terms of performance. The maximum power of 314Ps (231kW) and the maximum torque of 434N·m have surpassed the V6 engine, and of course the same is true in terms of price. . Good book data also brings good vehicle performance. Our measured 0-100km/h acceleration time is 5.84 seconds, which is worth the fare for its North American price.
|Volkswagen Golf R (seventh generation, Chinese standard)||Ford Mustang EcoBoost (medium standard)|
|Fuel supply method||In-cylinder direct injection + manifold injection||In-cylinder direct injection|
|Maximum power||280Ps (206kW)/5100-6500rpm||314Ps (231kW)/5500rpm|
|0-100km/h acceleration time||5 seconds (official)||5.84 seconds (measured)|
In fact, the Mustang itself is a fun and affordable sports car for young people who are not well-off. Therefore, if you really like the Mustang and can’t afford the V8 Mustang GT or GT350, you don’t need it because of its cabin. What's hidden inside is a small four-cylinder machine and entangled. Better performance and lower taxes, this is an improvement. In fact, in order to let this new era wild horse run across the “grasslands” of the world, Ford seems to have no longer minded our feelings.
-Ford 2.7L V6 twin turbo engine
In addition to the large-displacement V8 engine, when we talk about American feelings, we usually think of those full-size pickup trucks running wild on the intercontinental highway. Of course, we always think that these pickup trucks are inseparable from the V8. However, what many people don’t know is that the F-150, the most-selling full-size pickup truck in the United States, has already been equipped with a six-cylinder engine. In its latest generation, the displacement of the V6 turbocharged engine has been reduced to 2.7. L.
Although the F-150 is basically out of the Chinese market, this 2.7T engine is not exclusive to the US. In 2015, we will see a new generation of domestically produced sharp world produced by Changan Ford. Its top power is this powerful engine on the F-150. Judging from the news we got. The power of this 2.7T engine in the domestic cutting-edge world remains the same, the torque is reduced to 475N·m, but the speed of the output maximum torque is adjusted from the original 3000rpm to the range of 2500-4500rpm. I believe this adjustment also takes into account the domestic More complicated road conditions.
After the introduction of the new generation of sharp world, it will directly lock the competitor to the domestic Toyota Highlander. Therefore, the top version of the sharp world 2.7T model will be aligned with the Highlander 3.5L that also uses the V6 engine. If only from the parameters Look, the advantages of the V6 2.7T are overwhelming, even when compared with the high-power version of the Audi 3.0 TFSI engine across levels.
Although this 2.7T engine does not seem to be stiff enough on the F-150 pickup, it is very powerful for the new generation of sharp world that is about to be launched in China. Perhaps we still have a deep understanding of American pickups. +V8's beautiful fantasy, but looking at the outside world with both eyes open, it seems that many Americans themselves no longer have such an “American dream”.
Although there is no displacement tax in the United States, and the V8 OHV engine is still holding its own final territory, the unavoidable reality is that even the Detroit Big Three cannot stop the global trend. What's more, if you want to conquer the world again in the future, you must come up with products that cater to the future development direction. In this regard, Ford seems to have done more thoroughly. The EcoBoost series supercharged engines have been applied to almost all of its models; GM is in the traditional The high-performance field still adheres to the “V8 muscle feeling”, but in the face of the “rigorous demand” for “energy saving and emission reduction” in Europe, Asia and even the locals, the GM Group, which has global resources, has obviously already developed such a compliance such as ECOTEC. Trendy products. Feelings and the future, which one is more worth pursuing? For us, we can give up everything for a certain feeling, but for the company, looking to the future, winning the market is the most important thing.