But what we are going to talk about today is still the traditional internal combustion engine. Among the five gasoline engines that won this honor, there is no light mixing and no motor, which is completely exploring the limits of internal combustion engines. Let's take a look at the advantages of these award-winning engines that are the light of internal combustion engines.
BMW 3.0L turbocharged inline six-cylinder gasoline engine
Representative model: BMW M340i
BMW's inline six-cylinder engine is definitely one of Ward's top ten regulars. From the list of previous winners since 1995, we can see that we have only missed three times in 25 years.
Besides M340i, this B58TU engine is also used in BMW's Z4M40 roadster and 2020 X3M40i and X4M40i models. In fact, last year this B58? The 3.0L turbocharged inline six-cylinder engine won the Top Ten Engine Award, and this year's latest B58TU version has been optimized in terms of turbine impeller and compression ratio.
The turbocharger of this engine is integrated in the steel exhaust manifold, which can improve the response speed of the turbocharger and provide more power. At the same time, the mass of turbine impeller is reduced by 25%, which further accelerates the response speed.
In addition, compared with the previous compression ratio of 1 1.0: 1, this year's latest version is reduced to 10.2: 1. The lower compression ratio can offset the boost lag caused by the large turbine, and at the same time, the boost power is increased from 107 horsepower.
Thanks to the improvement of cooling effect and the reduction of parts weight, internal friction and emissions, the latest version of the straight six engine has achieved further data in terms of power performance, energy saving and emission reduction. Defending the top ten engines is definitely the biggest compliment to BMW.
Ford 2.3-liter turbocharged inline four-cylinder gasoline engine
Representative model: Ford Mustang? Ecoboost？ HPP
This engine is not the first time on the list. As early as 20 17, he won the top ten awards for his outstanding performance on Fox RS.
The engine mounted on Mustang is now changed from the horizontal layout on Fox RS to the vertical layout, but the overall structure of the engine remains unchanged. The model tested by the judges is a mustang? In HPP models, the back pressure of the turbine with larger diameter is lower, the boost is as high as 1.5bar, and the lifting power reaches 146 horsepower.
Of course, this engine actually has a great influence on domestic consumers. The exhaust volume of 2.3L greatly reduced the taxes and fees of Xinye Horse in China market, and its popularity and market share increased rapidly. Moreover, Ford's 2.3T engine is really not an idle generation: the maximum power of 365,438+04 horsepower and the maximum torque of 434n·m completely exceed the previous 3.7L naturally aspirated engine.
General 6.2-liter naturally aspirated V8 gasoline engine
Representative model: Chevrolet Corvette Stingray
After talking about the small-displacement turbocharged Mustang, let's talk about the typical American performance car-Chevrolet Corvette. From small to general? Shielding V8 series engines have also won awards in succession. After all, as a staunch pure fuel party, what kind of magic did GM give it?
However, this year's V8 is actually different from last year's award-winning version: this year's engine is 6.2L mounted on the new Chevrolet Corvette Stingray(C8)? V8 engine, code name LT2, belongs to the general small? Shielding "New Member" in V8 Series.
So where is the new one? First of all, the front engine was changed to the middle engine. The air intake and exhaust of this engine need to be redesigned. The volume of the whole intake chamber increased by 19%, and the exhaust was changed to upward layout to optimize the exhaust efficiency. The camshaft was further strengthened and the dry oil pan was replaced.
Coupled with the brand-new 8-speed dual-clutch gearbox (shifting speed is within 100 milliseconds), Ward's top ten judges agree that this powertrain makes the brand-new Corvette gain linear and abundant power performance in the full speed range, which is also enough for daily driving instead of walking.
Although the technology is far from advanced, such a large displacement will not save much oil, but in the United States, you can own a "6-liter V8 large displacement" for less than $60,000. Do you think it smells good?
Hyundai 1.6 liter turbocharged inline four-cylinder gasoline engine
Representative model: Hyundai Sonata
Korean products have won awards for two consecutive years, and this year they are still relatively traditional gasoline engines. More notably, it is also a small-displacement turbocharged model, which is one of the trends today.
For any car company, it is prudent to update and sell pillar models, even if it is a change, but it becomes more radical in the process of this replacement, not only referring to the change of design, but also including the replacement of powertrain at the same time, which is very rare at present.
In the era of electrification, Koreans choose to rely on more mechanical structures to further adjust the valve timing. They named it CVVD, which is a continuous full name? Variable? Valve? Duration, based on the original intake valve timing, this technology increases the intake valve opening time through the motor and connecting rod.
When the vehicle is driving at a constant speed, the valve is gradually closed during the compression stroke of the engine, which is beneficial to reducing compression resistance and improving fuel efficiency. When the engine is under high load, the CVVD system controls the intake valve to close at the beginning of the compression stroke to increase the air in the combustion chamber and inject more fuel, thus improving the torque.
With the increasingly strict emission and fuel consumption regulations, most car companies of some sizes choose the technical route to further tap the potential of internal combustion engines. The good news for domestic consumers is that this engine will be introduced into domestic production after some adjustments in the future.
An inline four-cylinder gasoline engine with a daily output of 2.0 liters and variable compression ratio.
Representative model: Nissan Teana (Teana)
Another "player" who won the second prize, Nissan won the prize last year with a 2.0T four-cylinder gasoline engine equipped with VC-TURBO variable compression ratio technology. At that time, it was a QX50 from finidi. With the continuous progress of technology, we once again saw this engine in the award list a few years later, but this time it came with a new generation of nature.
Variable compression ratio is an unavoidable word in this engine, but in fact the first engine to make variable compression ratio is not Nissan, but Saab. 1990, Saab obtained relevant patents and named the variable compression ratio technology it developed as "Saab? Variable? Compression "(SVC). Subsequently, Citroen, Volkswagen and other companies have also demonstrated their same type of variable compression ratio technology, but due to high cost and technical difficulty, they have never entered the mass production stage.
Different from other variable compression ratio technologies, Nissan's scheme uses four connecting rods to realize the change of compression ratio. When the compression ratio needs to be adjusted, the motor starts to rotate clockwise, driving the A connecting rod, controlling the eccentric shaft to follow counterclockwise, pushing the C connecting rod upward, affecting the corresponding changes of the L connecting rod and the U connecting rod, and finally increasing the combustion chamber area and reducing the compression ratio.
Apart from the variable compression ratio, this engine is not behind in other aspects. Atkinson and Otto cycle double cycle can make the vehicle match different cycles in different compression ratio scenarios, so that the power is stronger at low compression ratio and the fuel economy is better at high compression ratio. Technologies such as mixed injection and integrated exhaust manifold design also help the engine achieve higher fuel efficiency.
For traditional energy engines, the improvement of efficiency and power brought by new energy is simple and direct, but this does not mean that traditional energy engines have reached a real performance bottleneck. In this year's "Ward's Top Ten Engines and Powertrains", five gasoline engines won awards, indicating that internal combustion engines still have potential to be tapped. However, new energy is the inevitable spontaneous combustion in today's automobile market, so in the next article, we will focus on the hybrid power system and new energy power system to see which direction the current power system is developing.
This article comes from car home, the author of the car manufacturer, and does not represent car home's position.