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When talking about a car model, the first thing you should talk about is the appearance of its car. In terms of the appearance of the car, the BMW family-style sports appearance is adopted. The middle net grille on the front face is very large, and the eagle-eye headlights on both sides are quite huge. After the headlights on both sides are lit, they look very energetic. The lines on the side create a feeling of being ready to go, which looks very sporty. In addition, with the 18-inch wheel hub style, the sports atmosphere is even stronger. The shape of the rear of the car still looks beautiful, and the taillights are equally beautiful, especially the brake lights, which echo each other with the front daytime lights.

In terms of decoration, this car is also very high-end luxury. The steering wheel is made of leather, which feels good and makes people feel energetic when driving. In the central control area, there are door handles, etc., which are covered and wrapped with a lot of plastic, leather, wood and metal materials. It is simple to touch and feel, equipped with a 10.25-inch floating central control panel, which shows clearly and has a high resolution. The front row is also equipped with a dual-temperature automatic air conditioning control system to freely debug the most comfortable space atmosphere. The front and rear seats are relatively spacious and can firmly grasp the family.

The length, width and height are 5175×1900×1520mm respectively, and the wheelbase has reached 3105 mm. In the same class, the wheelbase of BMW 5 Series ranks fourth. The interior space of the car is relatively spacious at the same level, the height and width of the car are ideal, and the legroom in the back row will not feel cramped, which belongs to the upper-middle level at the same level. The design of skylight also increases the subjective space feeling of front and rear passengers. Among the models of the same price and class, the trunk volume of BMW 5 Series ranks 28th. The storage space in the car is quite satisfactory and basically sufficient. The interior space of the luggage compartment is relatively regular, with very good longitudinal depth and high expansibility, and the space performance is generally ideal.

The BMW 5 Series is equipped with a 2.0 engine with a maximum output of 190kW and a maximum torque of 400Nm. The power performance of the 2.0 engine on the BMW 5 Series is quite satisfactory, and the low torque is weak and the hysteresis can be felt. The official measured acceleration of BMW 5 Series is 6.5S, ranking 30th among the medium and large-sized cars with more than 800,000.

The active/passive safety configuration of BMW 5 Series is complete, includingAutomatic parking、Zero tire pressure endurance tire、Automatic parking、Steep slope descent、hill start assist control、knee airbag、HUD head-up display、Anti-lock braking (ABS)、Braking force distribution (EBD/CBC, etc.)、Brake assist (EBA/BAS, etc.)、Traction control (ASR/TCS, etc.)、Active noise reduction、Engine start and stop、Side safety air curtain、Wireless charging of mobile phone、night vision system、LED daytime running lights、Forward reversing radar、Tire pressure monitoring、Steering wheel heating、Body stability control (ESP/DSC, etc.)、Rear reversing radar、Fatigue reminder、Remote parking、Child seat interface、Lane keeping (LKAS)Equal configuration.

Among them,Automatic parkingYou can avoid stepping on the brakes for a long time or needing to pull frequently;Steep slope descentCan safely pass through steep slope road conditions at low speed;knee airbagReduce the injury of the car interior to the occupant’s knees in the secondary collision.

If the above data and participation can’t fully understand the BMW 5 Series, then we can give you a more comprehensive reference based on the word-of-mouth information of users who have purchased the BMW 5 Series in history. It can be seen that what everyone is most satisfied with the BMW 5 Series is that it likes the screen. In addition, the sense of technology and the beautiful interior are also the points that everyone likes it.

　　On September 24th, the highly anticipated HarmonyOS Zhixing Zhijie R7 coupe SUV was officially unveiled at the 2024 Huawei Autumn New Product Launch Conference. This luxury SUV, which integrates Huawei’s cutting-edge technology, has attracted the attention of many consumers with the strong blessing of Huawei’s Gankun Zhijia and the pre-sale price of 268,000 yuan.

　　Yu Chengdong, Chairman of Huawei BG and Chairman of BU, a smart car solution, said that in the intellectual world R7, HUAWEIADS 3.0 advanced intelligent driving system will be put on the bus, which adopts a revolutionary end-to-end architecture to upgrade intelligent driving, intelligent parking and active safety.

　　It is worth mentioning that for Shenzhen Yinwang Intelligent Technology Co., Ltd., which was previously registered by Huawei, a few days ago, Xu Zhijun, the rotating chairman of Huawei, responded to industry concerns for the first time. "At present, it is still in the first stage. When the second batch of car companies will come in, there is no clear plan, but they are in contact with all car companies."

　　HarmonyOS Zhixing released the first smart SUV model.

　　At the press conference, Yu Chengdong said that as of September 9th, the number of reservations for Huawei’s M9 had exceeded 140,000 units, while that for Zhijie R7 had exceeded 30,000 units in less than two weeks. This data not only shows the strong performance of Huawei smart cars in the market, but also reflects consumers’ high recognition and expectation of Huawei brand and its smart car products.

　　At the press conference of Zhijie R7, Yin Tongyue, Party Secretary and Chairman of Chery Holding Group Co., Ltd. said that Zhijie, as the first priority strategic project of Chery, has a research and development team of more than 1,000 people and has invested 10 billion yuan.

　　It can be seen that under the deep accumulation in the field of ICT, Huawei and domestic car companies are constantly drawing new blueprints for smart electric vehicles and smart driving. HarmonyOS Zhixing, as the core driving force of this strategy, is empowering the whole automobile industry with unprecedented depth and breadth, and pushing it to a higher level of industrial upgrading.

　　"With the blessing of Huawei’s Gankun Zhijia, the vehicle can not only cope with complex road conditions independently, but also show accuracy when parking." Yu Chengdong said that as a pure electric SUV, Zhijie R7 is equipped with Huawei Whale 800V high-voltage battery platform, with 800V high-voltage fast charging, 802km long battery life and more than 80,000 cooperative charging networks. The Max version and Ultra version of Zhijie will start mass delivery on October 15th, and the Pro version will start mass delivery on November 15th.

　　According to the official data released by HarmonyOS Zhixing, in August this year, HarmonyOS Zhixing delivered 33,699 new cars, including 31,216 new cars delivered by Wenjie, and the remaining 2,483 vehicles were delivered by Enjoying S9 and Zhijie S9, but the official delivery volume of specific models has not been announced yet.

　　It is expected that Huawei BU independence will be completed by the end of this year.

　　While HarmonyOS Zhixing continues to expand its product lineup, Huawei BU is also seeking a more independent operation mode and a broader technical cooperation prospect. Since Huawei Car BU formally established Shenzhen Yinwang Intelligent Technology Co., Ltd., a subsidiary of smart cars (with Yinwang) at the beginning of this year, all kinds of speculations in the industry around Yinwang have remained high. Especially in recent years, Aouita and () have successively taken shares, which makes Yinwang become the focus of public opinion.

　　In this regard, Xu Zhijun, the rotating chairman of Huawei, said that the company is still in the first stage, and started to operate as an independent company, and also introduced the investment from the first two car companies, including Aouita and Cyrus. In its view, in terms of automobile business, Huawei has clearly focused on three intelligences: intelligent driving, intelligent cockpit and intelligent vehicle control, which is precisely the field where Huawei has superior technology and capabilities and can reflect market value.

　　"At the end of this year, I hope to finish the first step and load all assets and personnel into the hope. When the second batch of car companies will come in, there is no clear plan. But we are in contact with all car companies. " Xu Zhijun said that Yinwang is reconstructing the cooperative relationship between automakers and component suppliers, and is also reconstructing the business model, from the original simple trading relationship to a value-sharing relationship.

　　Hope not only operates independently, but also receives long-term support from Huawei. The new company will continue to use two core brands-Gankun Zhijia and HarmonyOS Cockpit, and lead the intelligent second half of the automobile industry together with its partners.

　　Xu Zhijun believes that the change of this relationship is mainly reflected in two aspects. On the one hand, the product chain and value chain have been extended and upgraded in enterprise innovation; On the other hand, as an independent company with diversified equity, Yinwang is deeply bound to the automobile factory as a community sharing interests and risks.

　　When asked whether Huawei will insist on holding shares? Xu Zhijun said that without this idea, Huawei hopes that the more friends, the better. "At present, Huawei BU has a research and development team of more than 7,000 people, and has invested more than 40 billion yuan in research and development." Xu Zhijun revealed that in the most difficult period, the annual loss was more than 8 billion yuan. However, after hard work, a number of strategic cooperation models have been listed.

　　"Whether it is BU or Hope, it has passed the most difficult period. It has achieved profitability in the first half of this year and is expected to achieve full-year profitability." Talking about the future and challenges of Yinwang, Xu Zhijun said that the investors introduced by Yinwang must be strategic investors, not financial investors. Hope to closely combine with partners to realize risk sharing and benefit sharing. In operation, Yinwang will also abide by the independent business model and trading model and treat all customers equally.

　　[Gearbox Technology] With the increasing publicity of major car companies in recent years, dual gearboxes are rapidly being accepted by ordinary consumers. The rapid and large-scale popularization has also fully exposed its shortcomings, especially the low-speed frustration, abnormal noise and poor stability of some gearboxes. So, the problem can’t be avoided?

　　Even if you are not the owner, it seems that you can easily tell the shortcomings mentioned above when you mention the dual-clutch gearbox, especially the dry dual-clutch gearbox. After everyone has experienced its extremely fast shift speed advantage, it is not difficult that it also has obvious shortcomings. To get the answers to these questions, we must first talk about the basics.

■ What is the gearbox thinking?

　　For me, the gearbox can be said to be the best partner. The characteristics of low speed, low speed and high torque are revived by the gearbox, which can make the engine release high torque in the low speed range and low torque in the high speed range, so as to meet the different needs of vehicle climbing, traction or fuel economy. All this is the credit of gearbox gear selection, so why does it shift gears?

　　When the vehicle is running, the gearbox computer will judge the state of the vehicle through the data transmitted by various sensors, and then it will operate. This process is actually quite similar to our human thinking about life in a daze. Put yourself in the position of thinking about the problems and personal status, and then give solutions, and then the process of practice is exactly the same as that of human beings. This is just a series of actions on the gearbox, which are completed in milliseconds.

■ Can the problems of frustration and abnormal sound be avoided?

　　The development engineer is the person who has the most say in all kinds of situations of dual-clutch gearbox and the methods and means to solve the defects. As it happens, the editorial department just bought a new 7-speed dry-type one, so we consulted its engineer in charge of the development of dual-clutch gearbox on related issues.

■ Not only software, but also hardware optimization can reduce frustration.

　　From the problems we have collected, it seems that some dry dual-clutch gearboxes have been criticized by many people for shifting at low speed, so where does this feeling come from? Can it be effectively changed only by adjusting the software control strategy?

　　In fact, there is a similar semi-linkage state in the power transmission process of dual-clutch gearbox, in order to reduce the wear of clutch plates. Therefore, the engineer will combine the clutch pressure plate with the friction plate as soon as possible. At this time, if the difference between the output speed of the engine and the output speed of the transmission is relatively large, there will also be setbacks.

　　The previous 7-speed dry dual-clutch gearbox with code DQ200 used mechanical control arm and sleeve to squeeze diaphragm deformation. From the structural point of view, its transmission efficiency is higher. After being optimized for hydraulic system, it can better filter vibration, thus further reducing the occurrence of frustration.

　　In addition, when it comes to low-speed gear shifting, some friends may feel that the performance of the gearbox is slightly different in the same speed range after the "cold car" state and the "hot car". This phenomenon actually does not only appear in the dual-clutch gearbox, but also exists in AT, etc.

　　In addition to the optimization of these gearboxes mentioned above, the ride comfort of vehicles is actually related to the engine. Its torque response speed is also one of the factors that influence driving experience. At the same time, the powertrain mounting design also affects the driver’s perceived ride comfort to some extent. Therefore, it can be said that the optimization of powertrain ride comfort is a far more complicated project than imagined.

■ Where does the abnormal sound come from?

　　The sound generated during the operation of the gearbox, or those unpleasant abnormal noises, will drive the user crazy more than frustration, so where is the source of the abnormal noise? How to optimize it?

■ Poor stability of dry dual clutch?

　　When it comes to dry dual-clutch gearbox, poor stability or prone to thermal protection is also a problem that people give more feedback. Compared with the natural "weakness" of gearbox structure, how do engineers solve this part of the problem in the development process?

　　In the testing process, the development team conducted a longer related test for congested road conditions, and simulated the extreme conditions that car owners would encounter in their daily driving on roads with severe congestion and long creep. Finally, through the improvement of clutch plate material and control strategy, the gearbox assembly reaches the design goal of 320 thousand km maintenance-free

Full text summary:

　　At present, in the domestic market, consumers often regard whether to use the dual-clutch gearbox as the standard to judge the technical maturity of a car. However, compared with the wet dual-clutch, the dry dual-clutch gearbox is more prone to overheating in the face of urban congestion and creeping road conditions because its clutch assembly has no oil to dissipate heat. The structural differences make it at a disadvantage in terms of stability. In addition, in the process of its work, the sound generated by the fork and clutch plate also affects the use experience to a certain extent. From the engineer’s point of view, the problem can be solved to some extent by software control strategy. In addition, some problems can be solved at the hardware level by using hydraulic control system and replacing clutch plate materials. (Text/Figure car home Tang Dynasty)