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In modern cars, gearbox is a vital part, which directly affects the driving experience and fuel economy of vehicles. This paper will analyze in detail the working principles, advantages and disadvantages and applicable scenarios of three mainstream automatic gearboxes-AT (automatic gearbox), DCT (dual clutch gearbox) and CVT (continuously variable gearbox).

Working principle: AT gearbox realizes the switching of different gears through planetary gear sets and hydraulic torque converter. Its core lies in the use of hydraulic system to control the combination and separation of multiple clutches and brakes, so as to realize smooth gear shifting.

Advantages:

High reliability: because the transmission part mainly depends on gear meshing, the structure is stable and the failure rate is low.

Smooth shifting: The use of hydraulic torque converter makes the shifting process very smooth and the driving experience comfortable.

Sensitive response: it can quickly respond to the driver’s acceleration demand and provide good power output.

Disadvantages:

Higher fuel consumption: The early AT gearbox had higher fuel consumption because the torque converter was not locked. However, the modern AT gearbox has greatly improved this problem by improving the locking range and frequency.

Applicable scene: suitable for daily driving and long-distance travel, especially for drivers who pursue comfort.

Working principle: DCT gearbox consists of two independent clutch systems, one for odd gears and the other for even gears. When shifting gears, fast shifting can be realized by hanging the next gear in advance and switching the clutch.

Advantages:

Fast shifting speed: due to pre-shifting and clutch switching, the shifting process is almost seamless.

Direct power transmission: no hydraulic torque converter, high power transmission efficiency, driving experience close to manual gearbox.

Low fuel consumption: because the clutch is in a fully engaged state most of the time, the power loss is reduced.

Disadvantages:

Overheating problem: dry dual-clutch gearbox is easy to overheat when shifting gears frequently or crawling at low speed, while wet dual-clutch is cooled by gearbox oil, which improves this problem.

Application scenario: Suitable for vehicles that pursue driving pleasure and performance, such as sports cars and some performance cars.

Working principle: CVT gearbox realizes stepless speed change by changing the diameter ratio of two bevel wheels, and the transmission process is continuous and smooth.

Advantages:

Good ride comfort: there is no obvious setback during shifting, and the driving experience is very smooth.

High fuel economy: it can make the engine work in the best efficiency range and reduce fuel consumption.

Disadvantages:

Poor durability: Because the power is transmitted by friction between the steel belt and the bevel wheel, long-term and high-load work will easily lead to wear and slip.

Slow response speed: When accelerating or decelerating rapidly, the response speed of CVT gearbox is slow, which is not suitable for intense driving.

Application scenario: suitable for daily household use and gentle driving, not suitable for large vehicles or sports vehicles.

Through the detailed analysis of AT, DCT and CVT gearboxes, I hope it can help you better understand their characteristics and applicable scenarios, so as to make a more informed choice when buying a car.

Since the advent of Enjoy S9, it has often been compared with 56E. However, Weilai ET7 may feel more competitive pressure, because the price range shows that the price of Enjoy World S9 ranges from 399,800 to 449,800, while Weilai ET7 ranges from 428,000 to 516,000, and the entry-level model of Enjoy World S9 is nearly 30,000 yuan cheaper than ET7.

The two models belong to the category of medium and large cars, with slightly different sizes. The dimension of Enjoy World S9 is 5160mm x 1987mm x 1486mm, and the wheelbase is 3050mm；. Weilai ET7 is 5101mm x 1987mm x 1509mm, with a wheelbase of 3060mm, and the wheelbase of ET7 is over 10mm, while the length of Enjoy S9 is dominant, which is 59mm more.

In terms of power configuration, Enjoy the World S9 with single-motor rear drive and dual-motor four-wheel drive versions. Max version adopts single motor rear drive, with power of 230 kW, CLTC battery life of 816 km and acceleration of 5.98 seconds per 100 km; The Ultra version is a dual-motor four-wheel drive, with a power combination of 160 kW /230 kW, a battery life of 721 km and an acceleration of only 3.9 seconds. On the other hand, Weilai ET7 uses a dual-motor four-wheel drive system, with a total power of 480 kW, a torque of 850 Nm, a maximum speed of 200km/h, and an acceleration of 3.8 seconds per 100 km. The battery options cover Ferrous lithium phosphate and ternary lithium, with a capacity of 75kWh or 100kWh and a cruising range of 550km, 520km, 705km and 665km respectively, which supports rapid power exchange and is super in the country.

The configuration comparison selects Weilai ET7 2024 75kWh administrative signature edition and Enjoy World S9 2024 Ultra Four-wheel Drive flagship edition with similar price. Enjoy World S9 is equipped with a 15.6-inch HarmonyOS 4 system central control panel, which supports a number of advanced car functions, including four-zone speech recognition, continuous speech recognition and facial recognition, and provides entertainment facilities such as 32-inch projection screens for rear passengers. Weilai ET7 is equipped with 12.8-inch central control panel and Banyan system, equipped with 8295 chip. Although it also supports multi-area speech recognition, it is slightly inferior in facial recognition and other functions. There is a display screen behind the front seats to increase the entertainment experience in the back row.

Seat configuration, enjoy the world S9 standard equipped with zero-gravity seats, emphasizing ride comfort, and the rear seat can be adjusted and laid down, equipped with boss key, small table board, etc., with comprehensive functions. Weilai ET7 highlights the leg rest adjustment of the co-pilot’s seat, both of which have their own advantages.

In the field of intelligent driving, Enjoy World S9 is equipped with China ADS 3.0 system for the first time, covering cities and high-speed navigation-assisted driving. Weilai ET7 relies on four NVIDIA Orion-X chips, with a computing power of up to 1016TOPS, which supports NOP+ to enhance navigation assistance, but it is not as rich as the enjoyment S9 in some details and functions.

At a glance, in the business reception scene, Enjoy World S9 is eye-catching, with the intelligent driving system supported by Huawei technology and the luxury configuration in the back row. Weilai ET7 attracts consumers with its convenient power exchange service, high brand recognition and powerful all-round four-wheel drive performance.

Low fuel consumption is in line with the car demand of many office workers. After all, what I think about on my way to and from work every day is definitely not power control, but saving money and ensuring basic transportation needs. What we said today. Let’s take a look at it together.

First of all, from the appearance, Jetta VA3′ s front shape is relatively simple, and the air intake grille adopts dot matrix shape, which looks very sporty. Headlights are fashionable and accord with consumers’ aesthetics. The car is equipped with LED daytime running lights, automatic opening and closing, delayed closing and so on. Coming to the car side, the car body size is 4501MM*1704MM*1479MM, and the car adopts simple lines, giving people a very fashionable and simple feeling. With large-sized thick-walled tires, smooth lines run through the whole car side. In the design of the rear end, the rear end looks very solid, the taillight style is sharp, and the unique exhaust pipe is very streamlined.

In terms of interior, the interior looks very cold and gives people a very tough feeling. The steering wheel design of the car is very stable, and it is made of leather, which gives people an impulse to control it. Take a look at the central control. The car is equipped with a touch-sensitive LCD central control screen, which makes the interior design quite layered, and the overall design of the central control is remarkable. The dashboard and seats give people a good feeling, too. Let’s take a look. The dashboard of this car presents a clean design style and the design is relatively simple. The car adopts imitation leather seats, which are wrapped in place and have good overall comfort.

Jetta VA3 is matched with an automatic manual transmission (AT) gearbox, with an acceleration time of 12.5s per 100 kilometers, which has good power performance and is completely OK for daily use.

Jetta VA3 has good space in the back row, which is no problem to meet the daily travel needs. In addition, the car is equipped with anti-lock braking (ABS), LED daytime running lights, brake assist (EBA/BAS, etc.), braking force distribution (EBD), traction control (ASR/TCS, etc.), main driving airbag, co-pilot airbag, side airbag curtain, front side airbag and other safety configurations.

Do you have the urge to buy a car after reading the whole article? Let me make a summary. The moderate size of the car is a very suitable choice for many families, and the internal space is enough for daily use in families.

　　The key to building a socialist modern country in an all-round way and promoting the great rejuvenation of the Chinese nation lies in the party. General Secretary of the Supreme Leader profoundly pointed out: "The leadership of the Party is directly related to the fundamental direction, future destiny and ultimate success or failure of Chinese modernization." This edition will launch a series of comments from now on, explaining in depth that the key to promoting Chinese modernization lies in the Party.

　　— — Editor

　　New bureau, new atmosphere. Deploy relevant work intensively, set tasks, grab new machines, and sign contracts; Take the initiative to organize investment groups to explore business opportunities overseas; Strive for a good start and hold a centralized commencement ceremony for major projects … … Recently, all localities have gone all out to promote the implementation of the spirit of the 20 th National Congress of the Communist Party of China. From vast fields to prosperous cities, from factory workshops to construction sites, under the leadership of the Party, all walks of life have aroused the spirit of "fighting", "pioneering" and "practical" enthusiasm, and China’s socialist modernization drive has taken on a new look day by day.

　　The mountain has a ridge, and the house is solid because of the beam. The leadership of the party is the "anchor needle" for the continuous development of the cause of the party and the state. Report to the 20th CPC National Congress of the Communist Party of China put forward that "Chinese modernization is the socialist modernization led by the Communist Party of China (CPC)". At the opening ceremony of the seminar for newly-appointed members of the Central Committee, alternate members and leading cadres at the provincial and ministerial levels to study and implement Socialism with Chinese characteristics Thought of the Supreme Leader in the New Era and the Party’s Twentieth Spiritual Congress, General Secretary of the Supreme Leader gave an in-depth explanation of the Party’s leading position in Chinese-style modernization, and profoundly pointed out: "This is a qualitative statement of Chinese-style modernization, and it is fundamental to manage the overall situation. Why should we emphasize the party’s leading position in Chinese modernization? This is because the leadership of the party is directly related to the fundamental direction, future destiny and ultimate success or failure of Chinese modernization. "

　　The modernization of China bears the dreams and expectations of the people of China. After modern times, the country was humiliated, the people suffered hardships and civilization was dusty, and the Chinese nation suffered unprecedented disasters. From the Westernization Movement’s "learning from foreigners to control foreigners", to the Reform Movement of 1898′ s "improving and strengthening the country", and then to the "bourgeois republic" and "revitalizing industry" plan of the Revolution of 1911 & HELIP; … In order to save the nation from peril, countless people with lofty ideals ran and shouted, and various national salvation schemes were introduced in turn, but they all ended in failure. The important task of exploring China’s modernization road has historically fallen on the Communist Party of China (CPC).

　　During the new-democratic revolution, it created fundamental social conditions for the realization of modernization; During the period of socialist revolution and construction, it laid a fundamental political premise and valuable experience, theoretical preparation and material foundation for modernization; In the new period of reform, opening up and socialist construction, it provides a new and energetic institutional guarantee and a material condition for rapid development for Chinese modernization … … Looking back on the course of one hundred years, the Communist Party of China (CPC) shouldered the heavy responsibility of exploring China’s modernization road, United and led the people to make unremitting efforts to profoundly change the direction and process of the development of the Chinese nation after modern times, the future and destiny of the people of China and the Chinese nation, and the trend and pattern of world development. History and practice fully show that the great achievements of Chinese-style modernization have been achieved through long-term exploration and practice led by our party, and have gone through hardships and paid a huge price. History and people chose the Communist Party of China (CPC), and the Communist Party of China (CPC) did not live up to their choice.

　　The road is like a rock, and the traveler has no boundaries. Since the 18th National Congress of the Communist Party of China, the situation that the Party and the country are facing is complicated, the struggle is severe, and the arduous task of reform, development and stability is rare in the world and history. The CPC Central Committee with the Supreme Leader as the core has led the whole party and the people of all ethnic groups in China to forge ahead, continue to advance on the basis of long-term exploration and practice since the founding of New China, especially since the reform and opening up, and constantly achieve innovative breakthroughs in theory and practice, and successfully promote and expand Chinese modernization. The vivid practice and great changes in the new era for ten years have enriched the scientific connotation of Chinese modernization, highlighted the China characteristics of Chinese modernization, defined the essential requirements of Chinese modernization, and broadened the way forward for Chinese modernization. Our Party has not only initially established the theoretical system of Chinese modernization, but also made Chinese modernization clearer, more scientific and more sensible and feasible, vividly explaining that "Chinese modernization is the only correct way to build a strong country and rejuvenate the nation". Facts have eloquently proved that the Party’s establishment of the core position of the Party Central Committee and the whole Party, and the guiding position of the Supreme Leader’s Socialism with Chinese characteristics Thought in the new era reflect the common aspiration of the whole Party, the whole army and the people of all ethnic groups throughout the country, which is of decisive significance to the development of the cause of the Party and the country in the new era and the historical process of promoting the great rejuvenation of the Chinese nation.

　　It is a great theoretical innovation of the 20th National Congress of the Communist Party of China and the latest great achievement of scientific socialism to put forward and elaborate the Chinese modernization theory in general. Socialism with Chinese characteristics is socialism rather than anything else, and Chinese modernization is socialist modernization led by the Communist Party of China (CPC) rather than anything else. Report to the 20th CPC National Congress of the Party clearly put forward the essential requirement of Chinese modernization, and the first thing is to "adhere to the Communist Party of China (CPC)’s leadership"; Clearly put forward the major principles that must be firmly grasped in Chinese modernization. The first one is to "uphold and strengthen the overall leadership of the Party". Adhering to the Communist Party of China (CPC)’s leadership is the most distinctive feature and outstanding advantage of Chinese modernization, and it is the highest principle that must be adhered to in promoting Chinese modernization. We should profoundly realize that the leadership of the Party determines the fundamental nature of Chinese modernization, ensures that the Chinese modernization is anchored to a stable and far-reaching goal, stimulates the strong motive force of building Chinese modernization, and condenses the majestic power of building Chinese modernization. To promote Chinese-style modernization, we must uphold and strengthen the overall leadership of the Party and give full play to the Party’s leading core role of commanding the overall situation and coordinating all parties. Taking the party’s banner as the banner, the party’s direction as the direction, and the party’s will as the will, implementing the party’s leadership in all aspects of the party and state undertakings and making the party always the most reliable backbone of all the people when storms strike, we will certainly be able to ensure the correct direction of China’s socialist modernization and the bright prospects and prosperity of Chinese modernization.

　　Things are sweet and bitter, and those who taste them know; There are dangers in the Tao, and those who follow it know it. Chinese-style modernization is a great achievement of long-term exploration and practice led by our party and a great and arduous cause. The new journey is an expedition full of glory and dreams. The more magnificent the journey is, the more ambitious the goal is, and the more it needs the core steering orientation and the guidance of truth. Unite more closely around the CPC Central Committee with the Supreme Leader as the core, fully implement Socialism with Chinese characteristics Thought of the Supreme Leader in the new era, profoundly understand the decisive significance of the "two establishment", strengthen the "four consciousnesses", strengthen the "four self-confidences" and achieve the "two maintenance", stride forward along the broad road of Chinese modernization, think with one heart and make one effort, work hard and unite, dare to struggle and be good at it.

Although Pentium T90 and Pentium Pony belong to Pentium family, their positioning and design styles are quite different. T90, positioned as a medium-sized SUV, has a magnificent design and tough lines, showing a strong sense of movement and strength. The front face is designed in a family style, and the large air intake grille is matched with sharp LED headlights, which is full of visual impact. The side of the car body, smooth waistline and wide wheel eyebrows show its steady posture, the tail design is well-defined, the penetrating taillights enhance the recognition, and the overall shape shows the domineering of the flagship SUV.

In contrast, Pentium Pony is positioned more close to the people, focusing on urban transportation and family use. The design tends to be small and exquisite, with soft lines, simple front face without losing the sense of fashion, and the small body size makes it easier for the city to shuttle. In the interior, Pentium pony pays attention to practicality and comfort, adopts warm color matching, has simple central control layout, convenient operation and reasonable space utilization, and meets daily travel needs.

The interior of Pentium T90 is more luxurious and technological, wrapped in a large area of soft materials, with exquisite stitching technology, showing high-end quality. The center console is equipped with a large-size touch screen, which integrates rich intelligent interconnection functions, intuitive operation interface and quick response, creating a driving environment where technology and comfort coexist.

The difference in appearance and interior reflects the Pentium brand’s accurate grasp of different market demands. Whether it is the T90 that pursues luxury and strength, or the pony that pays attention to practicality and convenience, it can find a suitable choice in the Pentium family.

It is impossible to simply judge which level is high, and which car to choose depends more on personal preferences and needs.