[YesAuto Chassis Analysis] Divided by model size, the compact SUV Dongfeng Nissan Qashqai is slightly larger than the small SUV Changan Suzuki Fengyu, but from the attention of netizens, the “dislocation” competition between these two cars is still It’s very fierce, because their price ranges overlap to a certain extent. According to the manufacturer’s guide price, 160,000 can buy all Fengyu models, including the top 1.6L CVT four-wheel drive elite, or the 2.0L elite version. Qashqai, so choosing Fengyu with a four-wheel drive system or a slightly larger Qashqai has become a problem for consumers. Therefore, in order to give you more guidance, we put them on the lift, and look at the difference between the two from the perspective of chassis technology.
● Model introduction
From the perspective of the chassis, we can find that the two cars have chosen the MacPherson independent suspension in the front suspension structure, but there are differences in the rear suspension structure. The Qashqai uses a multi-link type. Structure, Fengyu adopts torsion beam structure. In addition, there are many differences between the two vehicles in terms of work materials and chassis details. Let's understand them in detail below.
● Front suspension part
The front suspension structure and materials of Qashqai and Fengyu are similar, and there is no obvious difference in the level of lightweight. The overall design also conforms to the positioning of their home SUV. Perhaps if you want to know which one is better or worse, we have to take a closer look at the details of the front part of the chassis.
● Comparison of details such as front suspension
During the braking process, the vehicle will distribute more braking force to the front wheels than the rear wheels in order to cope with the greater load that the vehicle's center of gravity moves forward to the front axle when braking. Of course, the pros and cons of braking performance are not only dependent on the braking force exerted by the brake calipers, but also related to the adhesion coefficient of the tires to the ground, the weight of the vehicle, the ABS control system and even the body attitude control. From the perspective of structural configuration and brand selection, Qashqai and Fengyu are not the same, let's take a look at their real test performance.
On Qashqai and Fengyu, suspension control arms, shock absorbers, springs, anti-roll bars, steering tie rods, steering knuckles, wheels, etc. are all unsprung masses. The mass of these components is related to the dynamic response of the suspension and steering system. Directly, the lighter the unsprung mass, the faster the dynamic response of the vehicle's handling and stability. This is why models that pursue more performance, on the basis of ensuring the structural rigidity and reliability, do this part of the lightweight design regardless of cost, such as using lighter aluminum alloy material or hollowing out weight reduction design.
Both cars use cast iron steering knuckles, and have different shapes after lightweight structural design and strength analysis. Casting in the field of ordinary passenger cars is a very suitable process for building steering knuckles, because it can achieve more complex design and ensure good structural strength, so cast iron steering knuckles are especially common in ordinary family cars. . Casting and forging aluminum alloy materials have gradually become standard on luxury brand models or sports cars that pay more attention to lightweight design. But needless to say, cast and forged aluminum alloy materials are obviously more expensive than cast iron materials in terms of manufacturing costs.
Through comparison, we found that Qashqai and Fengyu have different structural forms of the front subframe. However, this is not the most essential and important difference, because what is interesting is the rear suspension. Why do you say that? Let's look at it next.
● Rear suspension structure comparison
The reason why Qashqai’s suspension is very similar to the above three cars is that Nissan X-Trail, Qashqai and Renault Correga are all from the same Nissan CMF platform, and the Nissan C platform used by the Venus T70 is the same as that of the previous generation Qashqai and X-Trail. Platform (CMF platform is the latest technology platform developed by Nissan based on C platform technology), so they are inextricably linked. This also reveals that with the development of platform technology, perhaps the chassis of future models will become more and more similar (to learn more about the relationship between the chassis and the platform, please read “Auto Show Revelation: Platform Sharing Strategy from the Chassis”).
It is worth mentioning that if we put our vision on the global market, we also found that on the overseas diesel version of the Nissan Qashqai, the rear suspension adopts a torsion beam structure, which is different from the aforementioned Fengyu rear suspension. The frame is somewhat similar. However, based on the consideration of the four-wheel drive transmission structure, the torsion beam in the rear suspension of Fengyu has its own special design.
The simple structure of the suspension does not mean lack of performance. Just as the torsion beam structure can also achieve different bounce trends of the left and right wheels to a certain extent, coupled with the comprehensive setting of spring stiffness and shock absorber damping, this structure also It can achieve good stability and comfort. From this point of view, the performance of the torsion beam suspension is not absolutely weaker than the traditional independent suspension.
From the perspective of the rear suspension structure, Qashqai and Fengyu show a big difference, one is a multi-link structure, and the other is a torsion beam structure. It can be said that this reveals the different emphases of Suzuki and Nissan's chassis design, such as cost considerations, overall space layout considerations of the body, and the reasons for the technical origins of each platform.
● Four-wheel drive system
In Fengyu's product line, the four-wheel drive system only appears in the top models of each displacement level. If you compare the two-wheel drive version of Fengyu and Qashqai, Fengyu will have a more competitive advantage in terms of price. .
● Comparison of rear suspension details
● Comparison of other details
Although a plastic shield looks simple, it actually has many functions. It can not only improve the ability of the chassis to resist stone attacks, but also has a certain sound insulation effect, and can allow air to pass through the bottom of the car more smoothly, reduce the generation of air turbulence, and improve the aerodynamic characteristics of the bottom of the car.
Qashqai completely covered the bottom part of the engine compartment with a whole piece of plastic guard, but the bottom part of the passenger compartment did not use any guard. Fengyu uses plastic guards in both parts, but the guards used do not completely cover the engine compartment.
In general, it can be said that Qashqai and Fengyu have a big difference in chassis technology, which is mainly reflected in the difference in the rear suspension structure and the configuration of the four-wheel drive system. Qashqai’s rear suspension uses a theoretically more comfortable and stable multi-link structure, and the body size is larger than Fengyu; although Fengyu uses a relatively simple torsion beam rear suspension And the body size is also small, but the four-wheel drive system makes it look like a four-wheel drive model “though small and complete.”
If the budget is around 150,000 to 60,000, it is indeed a problem whether to buy the top-equipped 1.6L CVT four-wheel drive elite Fengyu or to choose the 2.0L CVT elite Qashqai. For friends who pay more attention to cost-effectiveness, I think Fengyu is more suitable for you, because such a budget can buy a richer configuration of Fengyu. It is not only equipped with a four-wheel drive system with multiple clutch differentials, but also Its xenon headlights also look stronger than the halogen lights on the 2.0L CVT Elite Qashqai. In addition, Fengyu is more kind in terms of keyless entry system, sunroof configuration, and spare tires. It is worth mentioning that this 1.6L model can currently enjoy the national purchase tax reduction policy. To get this discount, Qashqai can only choose the 1.2T version. However, for those who are more concerned about body size, the more elegant Qashqai is more suitable for you. In addition, compared with Fengyu's torsion beam rear suspension, Qashqai's rear multi-link suspension will surely satisfy you in terms of comfort performance. In short, if you choose Fengyu or Qashqai, you still have the right to speak.