[YesAuto chassis analysis] The 2015 Guangzhou Auto Show is still held at the Pazhou International Convention and Exhibition Center. Although the growth of China's auto market has slowed this year, automakers have not stopped their pace of releasing new cars. More new energy models will be released at the 2015 Guangzhou Auto Show. Chinese brands have also launched many new cars with competitive appearance and interior design. Behind the environmental protection concept and beautiful design, what changes and innovations have been made in the chassis technology of these new cars? Perhaps we will get some inspiration from the real shots of the “skirt bottoms” of the popular new cars at the Guangzhou Auto Show.
Note: Due to the complicated chassis structure, the chassis structures used by the various models in the article are not the same. Therefore, the order of introduction of each model in the full text is front suspension, rear suspension, and other details of the chassis.
● Small SUV
◆ Changan Automobile Changan CS15
Changan CS15 is a brand new small SUV under Changan Automobile. The body size of the new car is smaller than the Changan CS35, and the wheelbase is 2510mm. The new car is equipped with a 1.5L naturally aspirated engine with a maximum power of 107 horsepower and a peak torque of 145 N·m. The engine is matched with a 5-speed manual gearbox, which will also be equipped with a dual-clutch gearbox in the future.
◆ Changhe Automobile Changhe Q25
Changhe Q25 is a model born after changing the exterior design on the basis of the BAIC Saab X25. Its interior is basically the same as the X25 except for the color. The body size of the new car is 4095/1750/1545mm in length, width and height, and the wheelbase is 2519mm. The car will be equipped with two naturally aspirated engines of 1.3L and 1.5L, which are matched with a 5-speed manual transmission or a 4-speed automatic transmission.
◆ Mianyang Jinbei Zhishang S35
Zhishang S35 is a small SUV owned by Mianyang Jinbei. The length, width and height of the new car are 4025/1725/1644mm respectively, and the wheelbase is 2500mm. The car is equipped with a 1.5L naturally aspirated engine with a maximum power of 102 horsepower and a peak torque of 135 N·m. The transmission system is matched with a 5-speed manual gearbox.
◆ Dongfeng Passenger Vehicle Dongfeng Fengshen AX3
Dongfeng Fengshen AX3 is a brand-new small SUV under Dongfeng Passenger Vehicle, with a pre-sale price range of RMB 69,700 to RMB 897,700. The body size of the new car is 4518/1740/1562mm in length, width and height, and the wheelbase is 2620mm. The new car will provide a 1.5L naturally aspirated engine and a 1.4T turbocharged engine for consumers to choose from. The 1.5L engine has a maximum output of 116 horsepower and the 1.4T engine has a maximum output of 140 horsepower. In terms of the transmission system, a 5-speed manual or 6-speed automatic gearbox will be matched to the engine.
◆ JAC JAC iEV6s
JAC iEV6s is a pure electric small SUV under JAC. The car is expected to be officially launched on the market from March to April next year. The length, width and height of the new car are 4135×1775×1560mm, and the curb weight is 1310kg. The battery pack of JAC iEV6s's pure electric system uses 18650 lithium batteries. In the fast charge mode, the vehicle can be fully charged with 80% power in only 1 hour. The vehicle has a comprehensive cruising range of 253km and a 60km/h constant speed cruising range of 300km. The new car has a top speed of 130km/h and an acceleration time of 11 seconds from 100 kilometers.
As a branch of SUV models, small SUVs are loved by many domestic users and their market share is also increasing. Small SUVs are small, easy to handle, better than normal cars, and cheaper in price. These are the characteristics of small SUVs. The above analysis of 5 new Chinese brand small SUV car chassis. These new car chassis did not neglect the quality control due to the limited cost. Most small SUVs on the market use torsion beam rear suspension. Although this suspension structure is not conducive to comfort settings, it can increase the suspension stroke through reasonable structural layout and the use of long-stroke shock absorbers. It achieves good passability and comfort, and meets the needs of ordinary users for daily car use.
● Compact SUV
◆ Qoros Auto Qoros 5
The Qoros 5 is a new compact SUV released by Qoros Motors the day before the Guangzhou Auto Show, with a pre-sale price of RMB 150,000 to RMB 220,000. The body size of the new car is 4587/1878/1676mm in length, width and height respectively. The car is equipped with a 1.6T turbocharged engine with a maximum power of 156 horsepower and a peak torque of 230 Nm. Matched with the engine is a 6-speed dual-clutch gearbox.
◆ Dongfeng Yueda Kia Kia KX5
Kia KX5 is a compact SUV owned by Dongfeng Yueda Kia, which will be launched in March 2016 . The length, width and height of the new car are 4470/1855/1660mm respectively, and the wheelbase reaches 2670mm. The car will be equipped with a 1.6T turbocharged engine and a 7-speed dual-clutch transmission.
The competition of SUV models broke out from the compact SUV level. The emergence of Honda CR-V, Ford Escape, Volkswagen Tiguan and other models has driven the market's strong demand for SUV models of this level. Major manufacturers want to take a share of the compact SUV market segment, so they apply higher-cost configurations to their new compact SUVs. Therefore, new cars at this level will be equipped with an independent rear suspension that can better balance comfort and handling. Also because of the independent rear suspension, its follow-up products can also easily expand the four-wheel drive function. This is why we can see the reserved space for the central drive shaft of the four-wheel drive system on the chassis of some two-wheel drive models.
● Medium SUV
◆ Beijing Benz Benz GLC class
The Mercedes-Benz GLC-class under Beijing Benz is a replacement product of the GLK-class. The length, width, and height of the new car are 4656mm/1890mm/1685mm, and the wheelbase is 2873mm. Compared with the GLK class, the wheelbase of the new car has been lengthened by 118mm. The car will be equipped with a variety of tuned versions of the 2.0T engine, with maximum power of 184 horsepower (GLC 200), 211 horsepower (GLC 260) and 245 horsepower (GLC 300) depending on the model. In terms of transmission system, the GLC class uses a 9-speed automatic transmission to replace the 7-speed automatic transmission on the GLK class.
The Mercedes-Benz GLC-Class is a replacement model of the Mercedes-Benz GLK-Class, and is a medium-sized SUV under the luxury brand Mercedes-Benz. The chassis structure of the car is more complicated than the Mercedes-Benz GLK class, and the details are better. The front and rear suspensions of the Mercedes-Benz GLC-Class adopt a multi-link structure, which provides more precise wheel positioning for the vehicle to improve the handling performance of the vehicle. In addition, the control arm and wheel bearing housing of the vehicle suspension system are made of lighter aluminum alloy material, which reduces the unsprung mass and improves the suspension response. In terms of chassis details, the Mercedes-Benz GLC class uses a large number of plastic guards to cover the bottom of the body to improve the aerodynamic performance of the vehicle. Compared with the front Macpherson rear multi-link suspension collocation widely used in ordinary brand mid-size SUVs, the suspension control arms and bearing seats are mostly made of steel materials, and only stone-resistant coatings are used to achieve chassis sound insulation and protection , The suspension structure and chassis materials of luxury brand mid-size SUV models such as the Mercedes-Benz GLC class are obviously superior, and they are in a benchmark position in this class of models.
● Small cars
◆ SAIC-GM Chevrolet Lefeng RV
Lefeng RV is a small SUV under SAIC-GM Chevrolet. The car uses a 5-seater layout, with a body length of 4205/1722/1525mm and a wheelbase of 2550mm. The rear seats of the new car can be folded down 4/6, which expands the storage space from 308 liters to 972 liters, and the storage capacity is further improved. Lefeng RV is equipped with a 1.5L naturally aspirated engine, matched with a 5-speed manual gearbox or a 4-speed automatic gearbox.
◆ GAC Toyota Leadership i1
Lingzhi i1 is a pure electric small car owned by GAC Toyota. The car's driving motor has a maximum power of 95 horsepower and cruising range and other parameters, which have not been disclosed by the official.
Similar to the situation of small SUV models, small cars are subject to limited manufacturing costs and can only use a relatively simple torsion beam rear suspension. Therefore, this type of rear suspension is more common in this class of vehicles. Manufacturers generally improve the comfort of torsion beam rear suspension through reasonable structural layout and the use of long-stroke shock absorbers. Both of the two small cars analyzed above use long-stroke shock absorbers.
● Compact car
◆ SAIC-GM Buick Weilang
Weilang is a brand new compact car under Shanghai GM Buick, including Weilang (sedan version), Weilang coupe (hatchback version) and Weilang GS (hatchback sports version) in three different versions. This model is equipped with a 1.5L naturally aspirated engine or a 1.5T turbocharged engine. Among them, the 1.5T turbocharged engine is matched with a 7-speed dual-clutch gearbox; and the 1.5L naturally aspirated engine is matched with a 6-speed manual gearbox or a 6-speed automatic gearbox.
◆ Changan Peugeot Citroen DS 4S
DS 4S is a compact car owned by Changan Peugeot Citroen. The length, width and height of the new car are 4435/1843/1510mm, and the wheelbase is 2715mm. The car will provide three power options of 1.2T, 1.6T and 1.8T. However, the specific power parameters have not been officially announced.
◆ Beijing Hyundai leads
Leading is the sixth-generation ELANTRA model overseas, which is expected to be launched on the market in March next year. The new car will be equipped with a brand-new 1.4T engine, paired with the engine is a dual-clutch gearbox. The new powertrain will also bring a comprehensive improvement to the power performance of the new car.
◆ Chery Automobile Arrizo 5
Arrizo 5 is a new compact car launched by Chery Automobile. The car will be listed in March next year. The length, width and height of the new car are 4572/1825/1482mm in order, and the wheelbase has reached 2670mm. Arrizo 5 will be equipped with a 1.5L naturally aspirated engine with a maximum power of 116 horsepower, matched with a 5-speed manual transmission or CVT continuously variable transmission.
The compact new cars we have shot this time include joint venture brand models and Chinese brand models. These models all adopt the suspension form of the front and rear torsion beams of Macpherson, and the chassis sound insulation and protection are mostly realized by spraying anti-stone coating. Among them, SAIC-GM Buick Weilang increased the vehicle's handling performance by adding Watt connecting rods to the torsion beam rear suspension. Some models with relatively high prices use plastic guards that optimize the aerodynamic performance of the chassis.
● Medium-sized car
◆ Volkswagen (import) 8th generation Passat Travel Edition
The eighth-generation Passat travel version is based on the eighth-generation Passat. The model is expected to be imported for domestic sales. Introduced domestic models may be equipped with 1.8T and 2.0T turbocharged engines. The eighth-generation Passat travel version of the four-wheel drive model uses a fifth-generation four-wheel drive system from Haldex.
◆ Dongfeng Nissan Sima
Dongfeng Nissan introduced a new generation of Maxima into domestic production and named it “Sima” in Chinese. Although the interior, configuration and power parameters of the domestic Simma have not yet been announced, we can see the structure of the suspension system of the car now.
◆ SAIC-GM Chevrolet Malibu XL
Malibu XL is based on the latest overseas Malibu, and will be equipped with 3 powertrains (1.5T, 2.0T and hybrid), which will be officially launched next year. The body length of the Malibu XL is 58mm longer than the old model, and the wheelbase is increased by 91mm. At the same time, the frame and some parts adopt a lightweight design, which reduces the overall weight by 136kg.
This time we selected three medium-sized cars for real chassis shots. These three cars all use the front and rear Macpherson multi-link suspension form, but the specific structure has certain differences. Part of the control arms and bearing seats of Dongfeng Nissan Sima and SAIC-GM Chevrolet Malibu XL are made of aluminum alloy, which reduces the unsprung quality and improves the suspension response; the chassis sound insulation and protection are mainly through spraying and anti-rock coating Layers are realized, and plastic shields are also used in some areas. The eighth-generation Passat travel version introduced in the country by import has made more detailed chassis details, which is mainly reflected in the large-area use of glass fiber guards with better sound insulation performance.
◆ Dongfeng Honda Alison
Dongfeng Honda Alison was officially unveiled at the Guangzhou Auto Show. The new car is equipped with a 2.4L Earth Dream engine code-named K24V6, with a maximum power of 186 horsepower and a peak torque of 243 N·m. Matched with this engine is a CVT continuously variable transmission.
◆ Shanghai Volkswagen Touran L
Touran L is an MPV model launched by Shanghai Volkswagen based on the MQB platform. The model can be equipped with an optional seven-seater layout to meet my country's growing demand for the seven-seater MPV market. The length, width and height of the new car are 4527/1829/1659mm in order, and the wheelbase has reached 2791mm. The introduced domestic Touran L will be equipped with a 1.4T or 1.8T turbocharged engine. Matched with the 1.4T engine is a 7-speed dry dual-clutch gearbox; matched with the 1.8T engine is a 7-speed wet dual-clutch gearbox.
The two MPV models we actually shot this time are Dongfeng Honda Alison and Shanghai Volkswagen Touran L. Due to the differences in the positioning of the two cars, Alysent has a stronger business atmosphere, while Touran prefers home use, so the chassis structure design is not the same. Alysent uses a recessed chassis structure to achieve the maximum space in the car To create a more comfortable second-row seating space; Touran L uses more of the universal design of the MQB platform to shorten the model design cycle and reduce vehicle manufacturing costs. Allison adopts a front MacPherson rear torsion beam suspension, and the lower control arm of the front suspension is made of lighter aluminum alloy; while the Touran L from the MQB platform uses a front Macpherson rear multi-link In the form of suspension, all control arms are made of steel. In terms of chassis protection, Touran L uses a large-area plastic guard plate to make the chassis flatter, improve the aerodynamic performance and sound insulation performance of the chassis; while Ai Lishen mainly achieves chassis protection by spraying anti-stone coating . From the perspective of new MPV cars at the auto show, MPV models differ greatly in chassis structure design according to their uses. This is mainly for the purpose of satisfying the positioning of vehicle models.
Full text summary:
In this article, we have selected small SUVs, compact SUVs, mid-sized SUVs, small cars, compact cars, mid-sized cars and MPV models exhibited at the Guangzhou Auto Show to give you a brief analysis of the new car chassis. The suspension system innovation of the new car is not as fast as the engine gearbox. The suspension structure used on many new models has been in use for many years. Even this year's hot new energy vehicles use suspension structures that are very similar to ordinary gasoline vehicles. The price of a vehicle has a greater impact on the suspension structure and materials of the vehicle. Higher-priced cars are more inclined to use lighter materials and more complex suspension structures to improve suspension response performance and positioning accuracy. For example, the Mercedes-Benz GLC-class front suspension adopts a double wishbone-like multi-link front suspension made of aluminum alloy. We are also pleased to see that some medium-sized cars priced at around 200,000 yuan use more aluminum alloy components on the suspension to reduce the weight of the components and improve the response performance of the suspension, such as SAIC-GM Chevrolet Malibu XL and Dongfeng Nissan Simma. The difference in vehicle positioning leads to the difference in chassis structure. For example, Ai Li Shen uses the recessed chassis structure to maximize the interior space; Touran L uses the general design of the MQB platform more to shorten the vehicle design cycle and reduce vehicle manufacturing costs. . (Photo/Photo by Chang Qinglin from Auto Home / Auto Show Reporting Team)