[car home Jinhua Preferential Promotion Channel] At present, preferential activities are being carried out in Jinhua area, with a maximum discount of 132,400 yuan and a minimum starting price of 327,500 yuan. If you are interested in this model, you may wish to click "Check the car price" in the quotation form to get a higher discount.

The exterior design of BMW i4 is unique and full of futuristic feeling. The front face adopts the iconic double kidney air intake grille, but unlike traditional fuel vehicles, the i4 air intake grille is designed to be closed, which shows its electric identity. The grille is surrounded by blue decorative strips, which further emphasizes its electric characteristics. On the whole, the exterior lines of BMW i4 are smooth, and the body contour is dynamic, showing a modern and luxurious style.

BMW i4 adopts a streamlined body design, with a body size of 4785*1852*1455mm and a wheelbase of 2856mm. The front tread is 1601mm and the rear tread is 1630mm, which ensures the stability and handling of the vehicle. The side lines of the car body are elegant and smooth. With 18-inch rims, the front tyre size is 245/45 R18 and the rear tyre size is 255/45 R18, which enhances the sense of movement and visual effect of the car.

The interior design of BMW i4 is full of modernity and technology. The 14.9-inch touch screen of the center console is a highlight in the car, which integrates multimedia system, navigation, telephone and air conditioning voice recognition control system, providing drivers with rich information and entertainment functions. The steering wheel is made of leather, which supports manual adjustment up and down and back and forth, providing excellent grip and comfort. In the interior seat, a variety of materials are provided, including imitation leather, genuine leather and leather /Alcantara mix and match. The main and co-pilot seats have electric adjustment functions, including front and rear adjustment, backrest adjustment, height adjustment, leg rest adjustment and lumbar support adjustment, which increases the comfort of riding. The front seats are also equipped with heating function, which further enhances the riding experience. In addition, the car is equipped with multiple USB and Type-C interfaces, which is convenient for passengers to charge the equipment. At the same time, the front row is also equipped with wireless charging function, which facilitates the charging of mobile phones.

The BMW i4 is equipped with a powerful motor with a maximum power of 210kW and a maximum torque of 400 Nm, which provides a powerful power output and a smooth acceleration experience for the vehicle.

Car home’s evaluation of BMW I4 is impressive. He mentioned: "The configuration parameters of 3, 5 and X3 of the I series are almost the same, only the shell has been changed. I want to buy i4 at a cost of more than 100,000 yuan, just for a personality. Of course, it is still imported, so there is no need to do such a thing as buying it home and deducting the label. At first glance, the big nostrils are not mediocre. When I drive out, people are guessing at 600,000. I am sorry. " This not only shows the charm of i4, but also reflects its unique position in the market.

2006

Geely Automobile bought a 19.97% stake in British Manganese Copper Holdings, saving the company on the verge of bankruptcy.

2009

Geely successfully acquired DSI, the second largest automatic transmission company in the world.

2010

Geely’s final equity acquisition agreement for Volvo Car Company was signed in Gothenburg, and it acquired 100% equity of Volvo Car Company and related assets (including intellectual property rights).

2013

Geely bought all the shares of London Taxi Company from Manganese Copper Holdings.

2017

Zhejiang Geely Holding Group signed a final agreement with Malaysian DRB-HICOM Group to acquire 49.9% shares of Proton, a subsidiary of DRB-HICOM, and 51% shares of Lotus, a luxury sports car brand.

2018

Geely Group acquired 9.69% of Daimler’s shares through its overseas capital entities and has the corresponding voting rights.

Yes, the expansion speed of Geely Holding in recent years is like a bamboo. Not only Geely Holding, but also Geely Automobile has rapidly expanded its product camp in recent years, and can’t wait to let its products set foot in every track. On October 9th, Geely was officially listed, and this brand-new A0 pure electric car once again strengthened the Geely boutique new energy product camp.

The new car has launched five versions of Xingyuan and Xingyuan UP series, and the price range is 69,800-98,800 yuan.

At the same time, GEOME has officially become the Galaxy Smart Boutique Series, which explains why Xingyuan, as a product of Galaxy Series, put GEOME’s logo on the front face.

From the appearance, more than one media teacher said that at first glance, the smart feeling is very strong. But this is not a problem. After all, smart and Xingyuan can be regarded as the difference between being born and being born. The overall shape is round and full, providing 7 body colors, all of which are candy colors, which are very young.

The body size is 4135×1805×1570mm and the wheelbase is 2650mm, which has surpassed the competing products at the same level.

In terms of interiors, thanks to the GEA-based architecture, the cockpit "room rate" is as high as 85%. The whole system comes standard with a true five-seat spatial layout. The overall design of the cockpit is simple and fresh. Although simple, it is not simple, and the storage space has become the killer of the star wish.

70L front trunk +375-1320L trunk space +28L rear storage space+the only 10L oversized passenger drawer at the same level+the largest double-deck armrest space layout at the same level. As far as this storage configuration is concerned, it is really terrible for A0 products.

In terms of power, Geely Xingyuan adopted a solution with 11-in-1 electric drive+rear drive+multi-link suspension +AI virtual adjustment as the core technical route, so as to maximize the driving and control potential of the car. The 11-in-1 intelligent electric drive has the highest integration level, the lightest mass and the smallest volume, and also has the strongest power of 85kW and the highest working efficiency of 89%, making the maximum speed of Geely Xingyuan reach 140km/h and 0 ~ 50 K. Combined with rear drive, front and rear suspension of the whole system and axle load ratio close to 50: 50, the control is more flexible.

In addition, the intelligent field comes standard with the Galaxy Flyme Auto developed by Geely and the industry’s first unbounded space to realize the three-terminal interconnection of car, cloud and mobile phone. Galaxy Flyme Auto is an intelligent cockpit system built by deep integration of Geely Automobile and Xingji Meizu. It has strong interconnection ability, and realizes application circulation, intelligent voice and other functions through the non-inductive interconnection of mobile phones and automobiles, and realizes rich ecological extension.

Geely Star is willing to let Geely’s brand-new intelligent technology cover the A0-class car market. Not only that, Geely is unambiguous in expanding its product camp and will never hesitate. It can be said that the price of 69,800 yuan is not excessive as a homologous product. As a scooter for urban travel, Xingyuan does have certain competitiveness.

　　The air intake grille of the 2018 Land Rover Executive Edition is more luxurious than the original sturdy horizontal grille, and it has both luxury and domineering. On the day when the family is becoming more and more popular, inheritance is indispensable. The suspended roof, the clamshell starter hood and the shark’s side air intake are all reserved. The 2018 Land Rover Range Rover adopts a more aggressive plan, which is a good combination of sturdiness and elegance. The surface adopts a new cellular net plan, new Atlas side gills, new taillights and tailpipes.

Vehicle Configuration Price Color Current Vehicle Status

　　21018 Extended VOGUE Extended Range Rover Gasoline

　　2018 Range Rover Executive vogue Extended 3.0 Gasoline HSE

　　Sliding panoramic sunroof mahogany interior driver’s assistance package (blind spot assistance and lane-merging assistance) All-terrain feedback Second-generation terrain smart card heads-up display front seat ventilation heating+rear seat heating ring shadow electric suction door steering wheel heating front refrigerator 20-wheel foot electric tailgate electric rear sunshade 20-inch wheel hub, 8-speed automatic transmission, two-speed transfer case, full-time four-wheel drive, light-sensitive matrix LED headlights and cleaning, front and rear fog lights, induction wiper, light attenuation front windshield, Anti-glare inside and outside rearview mirror, multi-function steering wheel, cruise control, ambient light, aluminum alloy welcome pedal with lighting, keyless entry, keyless start, front refrigerator, electric suction door, electric adjustable front and rear seats, mahogany interior, 380W advanced audio, four-zone air conditioning, front and rear electric eyes, reflection, lane departure warning, full-size spare tire, foot-sensing electric tailgate, CD/DVD player, front and rear seats. Now the car procedures are neat and the colors are neat.

　　2018 American Range Rover Executive Gasoline

　　Configuration: Land Rover Range Rover Executive 3.0 Gasoline American Standard Black 2018 HSE package (20-inch 12-frame 1065 alloy wheels 8-speed automatic transmission terrain response dynamic stability control system steep slope descent control system sliding panoramic sunroof electric suction door perforation Windsor leather seats 20 front seat heating and rear electric adjustment heating rear seat heating steering wheel three zones temperature control aluminum pedal with Land Rover Range Rover lettering interactive drive display 10-inch touch screen 3 80w advanced sound system Apple system controls the front and rear electric eyes, and the rear reflection lane keeps the power. The tailgate is parallel to the road. Traffic signs identify cruise, constant speed, driver status monitoring, clear exit monitoring, 360 parking assistance, rear traffic monitoring), big driver package (parallel radar ranging lane deviation), visual assistance package (high-end LED headlights and signature DRL and car high beam auxiliary head-up display, and the front fog lights can be configured with indoor atmosphere lights), 825W advanced sound system. 20-way heating and ventilation front seat and heating and ventilation inclined electric rear seat ebony roof 4-zone temperature control ionization air purifier basic rear seat convenience package basic internal protection package 110V socket chrome-plated wheel lock is complete in color, and the car is sufficient.

　　2018 Middle East Land Rover Range Rover Executive Gasoline

　　Configuration: sliding panoramic sunroof, gesture sunroof sunshade, matrix headlights, LED lights, headlight cleaning, fog lights, 380W wheels, electric suction door, smart card, second-generation terrain, reflection, foot-sensing electric tailgate, shark cheeks with the same color on the car body, lane departure warning, front seat heating, refrigerator, four-wheel drive air conditioning, driving assistance (automatic braking, driver status monitoring, blind spot monitoring, and monitoring of incoming cars on both sides)

　　2018 Euro Land Rover Range Rover Executive Gasoline

　　Configuration: 18 models of gasoline administration, panoramic sliding sunroof, smart card, second-generation terrain feedback, electric folding rearview mirror, solid wood interior, three-zone air conditioner, 20-inch wheel hub, electric suction door, refrigerator, full-size spare tire, foot-sensing electric tailgate, xenon LED lamp, front and rear electric eyes, fog lights, reflection, ATPC all-terrain process control system, front seat heating, headlight cleaning with complete colors, and sufficient cars.

It can be sold all over the country and enjoy nationwide warranty.

　　Do business with sincerity and treat people with faith! A handshake, forever friends!

　　Business address: Zone H, Floor 1, Pacific International Automobile City, Haibin No.9 Road, Tianjin Port Bonded Area

　　Foreign car buyers can take the high-speed train to Tanggu to get off the bus, and can pick up the plane.

　　24-hour VIP hotline and WeChat: 13752491333 Manager Li (same as WeChat)

　　Name of merchant: Tianjin Jinxiang Automobile Sales Co., Ltd.

　　Store Address: Zone H, Floor 1, Pacific International Automobile City, Haibin No.9 Road, Tianjin Port Bonded Area

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　　Disclaimer: The above car purchase preferential information is provided by the comprehensive dealers of this website, and the price fluctuates greatly due to market factors, which is only for car purchase reference; The distributor is responsible for its authenticity, accuracy and legality, and this website does not provide any guarantee or assume any legal responsibility.

Yichexun?A few days ago, Harley’s brand-new road gliding and avenue gliding were officially launched. The configuration of the two cars was upgraded, the fairing was completely designed, and it was also equipped with a brand-newMilwaukee-Eight ^? 117 V Model a twin-cylinder engine. Avenue gliding costs 388,800 yuan, and highway gliding costs 408,800 yuan.

Street Glide boulevard gliding

The iconic bat wing fairing has a new look, the outline is carved as a whole, and LED lighting and shunt vents are fully integrated. With the help of computational fluid dynamics (CFD), the design of the fairings for avenue gliding optimizes the aerodynamic efficiency and improves the comfort of riders.

Road Glide highway gliding

The outline of the shark nose fairing is carved as a whole, and LED lighting and newly designed windshield are fully integrated, giving a new vitality. With the help of computational fluid dynamics (CFD) to improve aerodynamic efficiency, Highway glidingThe fairing is completely designed on the basis of the original frame fairing, which optimizes the road performance and rider comfort.

The two cars are equipped with brand-newMilwaukee-Eight ^? 117  1923cc V Model A twin-cylinder engine, with maximum power of 78kW/4600rpm and maximum torque of 176Nm/3250rpm, can produce 105 horsepower. With the increase of displacement, torque and horsepower, the new engine adopts a brand-new liquid-cooled cylinder head, which further optimizes riding comfort, especially in low-speed driving and hot weather.

The new car is equipped with a new 12.3-inch high-definition full-color TFT touch screen, which is more sensitive to touch and has navigation and SKYLINE OS infotainment system.

Driving mode provides more control and confidence under various driving conditions by electronically adjusting performance attributes and safety technical intervention level. Each driving mode (road, sports, rainy day, user-defined) provides a specific combination of settings, and also has settings such as engine braking, anti-lock braking system (C-ABS) and traction control system (C-TCS).

The brand-new avenue gliding is 8kg lighter than the old one, and the road gliding is 7.26kg lighter than the old one, which comprehensively improves the vehicle performance. The brand-new two cars are designed to improve driving comfort. The fairing redesigned according to aerodynamics and the brand-new engine are both beautiful while improving performance. Although the price is expensive, it is worth it!

[car home Fuzhou Preferential Promotion Channel] Recently, a large-scale preferential activity was launched in Fuzhou, with the highest preferential margin reaching 45,000 yuan and the lowest starting price reduced to 204,900 yuan. If you are interested in this model, please click "Check the car price" in the quotation form to get a higher discount.

Faw-Volkswagen CC’s exterior design is fashionable and atmospheric, the front face adopts family-style design language, the air intake grille adopts hexagonal design, and the interior is decorated with chrome banners, with sharp LED headlights, creating a strong visual impact. The overall style tends to be luxurious, the body lines are smooth, the side of the body adopts streamlined design, showing an elegant body outline, the tail design is simple and fashionable, and the overall shape is very in line with modern aesthetics.

The body size of FAW-Volkswagen CC is 4869*1870*1459mm, the wheelbase is 2841mm, the front tread is 1586mm and the rear tread is 1572 mm.. The lines on the side of the car are smooth and elegant. The front tires and the rear tyre size are both 245/45 R18, and with 18-inch rims, it shows a sporty and exquisite style.

The interior of FAW-Volkswagen CC adopts a simple and fashionable design style. The layout of the center console is simple, and the 9.2-inch central control screen is clear and easy to use, which supports voice recognition control of multimedia systems, navigation, telephones and air conditioners. The steering wheel is made of leather, which feels comfortable and supports manual adjustment up and down and back and forth. The front and rear seats are made of leather /Alcantara mixed materials. The front seats have heating function, and can be adjusted back and forth, height adjustment (4-way) and lumbar support (4-way), bringing comfortable driving experience to drivers and passengers. Sufficient USB and Type-C interfaces are provided under the seat, which is convenient for passengers to charge electronic equipment. In addition, the rear seats support proportional tilting, which increases the flexibility of the interior space.

FAW-Volkswagen CC is equipped with a 2.0T turbocharged engine with a maximum power of 137kW and a maximum torque of 320N·m, with excellent power performance. With the 7-speed wet dual-clutch gearbox, the acceleration and shift of the vehicle are smoother and the driving experience is improved.

The owner of car home praised the appearance of FAW-Volkswagen CC. He thought that the appearance design of this car was unique and attractive, the body lines were smooth and full of strength, and the overall design was like a swimming fish, fashionable and dynamic. He specifically mentioned that the headlight design is unique, the air intake is domineering, and the design of the small tail and tail is icing on the cake, making the whole car very attractive from any angle. As the owner said, "It’s very cool to drive this car out", the design of FAW-Volkswagen CC undoubtedly brought the driver a high turn-back rate and pride.

　　[car home Engine Disassembly] It’s human nature to like new things, and you won’t miss an important new car like brand-new (|). But I’m sorry, the new car hasn’t come on the market yet, and even the test drive report hasn’t been seen yet, but it doesn’t matter. Let’s take a look at the new 1.5T GDI engine on the new GS5 first.

● Basic information of engine

　　We noticed that the cylinder diameter/stroke ratio of GAC, a brand-new 1.5T GDI engine, has become smaller. This change of long stroke is helpful to improve the engine torque and make the engine respond better at low speed.

　　However, by comparing the power parameters of the three engines in the above table, we can intuitively see that the same 1.5T engine has different tuning and the maximum power/torque is different. Take the maximum horsepower as follows: Honda 177Ps＞ > Chuanqi 171Ps＞ > Great Wall 169Ps, but the maximum torque is reversed: Great Wall 285N·m＞ > Chuanqi 265ps. Chuanqi’s self-positioning in this "challenge" is quite clear. The setting of power parameters is not blindly adjusted upwards, but on the premise of ensuring power and torque, the output speed of maximum power is lowered and the output speed range of peak torque is widened.

　　Of course, Chuanqi 1.5T GDI engine, as one of the "three big parts" of the whole vehicle, is an important factor that many consumers consider before buying a car. This disassembly is more to help consumers clarify the advantages and disadvantages of Chuguangqi 1.5T GDI engine. AB: What is the difference (highlight) between Chuanqi GS5 1.5TG DI and GS4 1.5T engine in 2019? What gains can these highlights bring?

● What are the highlights of GAC’s 1.5T GDI compared with the previous 1.5T?

Highlight 1: change from manifold injection to in-cylinder direct injection

　　First of all, the biggest difference between this 1.5T GDI and GS4 1.5T engine lies in its name-GDI (in-cylinder direct injection). The most direct benefit of changing the fuel injection system from manifold injection to in-cylinder direct injection is that the engine power performance is improved and the harmful gases in the exhaust gas are relatively reduced. Moreover, we know that the first-tier cities in China will soon implement the more stringent national six emission standards. As a car company, GAC must be ahead of the policy, so this engine adopts in-cylinder direct injection technology to achieve the national six emission standards.

　　It is worth mentioning that "National VI" refers to a national policy standard for automobile exhaust emission. After the implementation of the "National VI" emission standard, it will be divided into two stages: "National VI A" and "National VI B", which will be implemented on July 1, 2020 and July 1, 2023 respectively. In some emission standards, "National VI B" is more than twice as strict as "National VI A" )

　　It is worth mentioning that with the help of turbocharger, a higher compression ratio means that the engine is more efficient, can improve more power performance, and saves more fuel, etc. After all, the working feature of direct injection engine is to directly inject fuel into the cylinder, and use the air flow in the cylinder and the fuel on the piston surface to achieve better atomization effect.

　　Direct injection engine has a good performance in working uniformity and performance under full load, and even the problem of working instability of cold car has been significantly improved. Of course, things are two-sided. While the engine enjoys the power improvement brought by high compression ratio, it is also a test for the fixation of high-pressure fuel rail and the fuel pump pressure of the fuel supply system.

　　The "dadada" sound of direct injection engine during fuel injection has always been a headache for engine NVH engineers. We can see their solutions on GAC 1.5T GDI this time:

　　When the engine is running in the compression stroke, the pressure in the cylinder is very large. For in-cylinder direct injection engines, ordinary fuel pumps can’t meet the demand. Another important feature of in-cylinder direct injection engine is that the fuel supply pressure of fuel pump is very high, so that gasoline can be effectively injected into the high-pressure combustion chamber.

　　Because of the combustion characteristics of gasoline, the compression ratio of ordinary engines can’t be designed too high, otherwise it is easy to knock, so most direct injection engines will divide the fuel injection process into two stages, that is, two injections. The GAC 1.5T GDI engine made a small breakthrough in fuel injection-The strategy of "three injections per cycle" is adopted under the specific working condition of "high load and low speed"(It can be understood that the fuel is injected three times per cycle only when the vehicle starts, and it is injected twice in other working conditions): The first-stage pre-injection (which occurs in the intake stroke and the crank angle is about 360°~180°CA) can take away a lot of heat in the cylinder under the action of gasoline volatilization, and reduce the cylinder temperature, so as to achieve a lower ignition angle, and to effectively suppress the probability of knocking and ensure stable combustion. The second and third main fuel injection (which occurs at the end of compression stroke and before power stroke, and the crank angle is about 0°CA) can bring higher exhaust temperature and accelerate the light-off of three-way catalyst.The advantage isTo achieve a rapid start, reduce engine emissions, meet the national six B emission standards, and reduce fuel consumption.

Highlight 2: Switch to exhaust gas turbocharger with lower inertia.

　　Although turbocharging technology is not a brand-new technology, it is the mainstream development direction to apply turbocharging technology to small displacement engines. Thanks to the ingenious design of turbine blades, the low inertia exhaust gas turbocharger provided by Borgwarner can take into account both high speed and high power and low speed and high torque.

Highlight 3: The three-way catalytic converter has added more precious metals.

　　Engineers have made a lot of efforts to purify the exhaust gas in order to make the exhaust gas from the 1.5T GDI engine meet the national sixth B emission regulations. The biggest highlight is the adoption of a brand-new three-way catalytic converter and the addition of more precious metals in the catalytic converter, thus reducing the light-off temperature to 270℃. What is the concept of 270℃? Let me give you an example for your reference: the light-off temperature of the three-way catalytic converter in the general national standard is 400℃, and the difference between them is 130℃.

　　The author jokingly said here: the exhaust gas discharged by an engine that can meet the national six B emission regulations should be cleaner than the air in many cities, right? Is that engine like a walking "air purifier"?

There are 25 small games in the double tour, all of which can unlock the trophy of "Little Game Tycoon", which are distributed in shacks, big trees, Rose’s room, cuckoo clock, snow ball, garden and attic.

Double-row mini-games introduction

1. shacks

There are two games in the double row shack, beating Cody and turning the switch.

> > > summary of the location of two-person shack games < < <

2. Big trees

There are two games in the tree for two, tug-of-war and toilet plug.

> > > summary of the location of two-person tree games < < <

3. Rose’s room

There are seven games in Rose’s room, such as tank brothers, spacewalk, laser tennis, rodeo, feeding reptiles, batting teams and stars among birds.

> > > Summary of Little Game Location in Rose’s Room for Two < < <

4, cuckoo clock

There are two games in the cuckoo clock, horse racing and bombing route.

> > > Summary of the location of the cuckoo clock game for two people < < <

5. Snow ball

There are four games in the snow ball for two, namely, icicle throwing, shuffleboard, snowball fight and ice racing.

> > > summary of the location of snow ball games for two people < < <

6. Garden

There are three games in the garden for two, namely, garden swing, larva basket and snail race.

> > > summary of the location of small games in the garden for two people < < <

7. Attic

There are five games in the attic for two, including toy racing, chess, music chair, volleyball and track and field players.

> > > summary of the location of small games in the attic for two people < < <

25 mini-games are equivalent to the collection of this book, so don’t worry about missing them. If you accidentally miss a mini-game, you can go to a specific chapter through [Chapter Selection] in the menu and look for it again. However, it is suggested that all small games should be collected as soon as Zhou Mu is available, so as not to waste time. Most small games are easy to find.

You can check the collection progress in the chapter selection interface, which will show the number of small games in each chapter, the uncollected ones will be displayed in gray and the collected ones will be displayed in yellow. You can also play these games at any time in the "Small Games" menu. Two players will compete for high scores, and the player with high scores will win, but there is no reward for small games, so you don’t need to play all these games, just find and unlock them.

The purple tambourine mark will appear when the character is close to the small game, so be sure to pay attention to it during the search.

　　　　[XCAR Technology Original]

　　　　Since the day when the automobile was invented, a "bad guy" who followed the vehicle along with it also appeared at the same time, and that was noise. In order to give users the best driving experience, in the past decades or even hundreds of years, car manufacturers have been fighting the "bad guy" of noise endlessly.

　　　　Now, automobile manufacturers will adjust their vehicles through strict noise control standards to ensure that each vehicle can achieve a good level of noise and vibration suppression when leaving the factory. Recently, the author was lucky enough to participate in and experience the NVH test of Changan Auchan. In the test, I experienced Changan Automobile’s emphasis on the development of Auchan’s NVH. So what "magic weapons" did Changan Automobile use to control Auchan’s NVH? Let’s continue to look down.

1. What is NVH?

　　　　NVH is the abbreviation of Noise, Vibration and Harshness. Noise and vibration are easy to understand. To put it bluntly, the roughness of acoustic vibration is those uncomfortable feelings, such as harsh, roaring sound and uneven vibration. NVH is the core index to measure the comfort and quality of a car, and the feeling it brings to users is also the most direct.

　　　　According to statistics, four of the top 10 complaints of consumers about automobiles are about NVH, namely, engine noise, tire noise, wind noise and body noise. About one-third of the complaints of the whole vehicle are related to the NVH problem of vehicles, and nearly 20% of the research and development expenses of major car companies are spent on solving the NVH problem of vehicles.

　　　　It can be seen that NVH is very important for both the vehicle itself and the brand, because it can give consumers the most intuitive impression and directly affect consumers’ perception of the "texture" of the vehicle, so it is an important task for all car companies to develop NVH well. At present, NVH is mainly determined by these points: government regulations, customer requirements, company needs and technical capabilities, competing models.

　　　　At present, automobile sound control has gone through three development stages:

　　　　1. Reduce noise: solve the error state of NVH and reduce noise.

　　　　2. Sound quality control: make the sound comfortable, meet the requirements of specific customer groups, and the sound of the vehicle model is personalized.

　　　　3, sound quality DNA: the model is personalized and the brand voice is differentiated.

　　　　Through the above three stages, the transition from noise control to sound design has been realized.

Second, the control of Auchan NVH

　　　　The vehicle noise that we can hear is usually generated by the noise source and transmitted through the channel to reach our ears. Generally, noise sources and transmission channels are controlled to reduce noise. Simply put, this is the transmission of sound in physics, and noise reduction should be suppressed from the source and propagation.

　　　　Generally speaking, vehicle noise is mainly divided intoAir soundandStructural sound：

　　　　Air sound sources: engine radiation noise, air inlet noise, air outlet noise, tire radiation noise, etc.

　　　　Structural sound sources: engine vibration, exhaust hook vibration, chassis vibration, transmission bearing vibration and so on.

　　　　Two kinds of sound sources are transmitted through the car body, and the air sound source reaches our ears through the car body barrier and car body sound absorption; The structural sound source reaches our ears through the body structure, bracket and vibration isolator. These two kinds of sound sources are transmitted and attenuated to form the interior noise together.

　　　　After understanding the generation of noise, let’s see what anti-noise and vibration capabilities Auchan has. Auchan, as an MPV model with high hopes from Chang ‘an, naturally invested a lot in NVH. We found many NVH development achievements on Auchan’s car body.

　　　　In the overall design, Auchan has optimized the acoustic vibration transmission structure such as modeling, powertrain, car body and chassis suspension, so as to reduce the noise source and isolate the transmission of vibration and noise outside the car.

　　　　The first is engine noise suppression. Auchan’s 1.5L naturally aspirated engine has done a number of treatments in silence, including valves, fuel injectors, air intake systems, silent pulleys, etc., which reduced the engine noise at the source. According to official data, the idle noise value of Auchan is only 39 decibels.

　　　　Auchan soundproofed the engine to reduce the noise from being transmitted into the cab through the front wall, fender, hood and other channels. The composite sound insulation and absorption material is pasted under the hood, which can absorb and reduce the noise of the engine and suppress the vibration of the hood.