[car home reveals new car technology] The team was founded in 1929, entered F1 in 1950, won 16 team championships and 15 drivers’ championships. This prancing horse has achieved unprecedented results in F1. However, it seems that there is always a curse of "frustrated in the stadium and proud of the people" hanging over the heads of Italians. In this way, under the background of poor performance in F1 this year, this civil supercar named SF90 Stradale came to the stage. So can it, like its predecessors, not disgrace Ferrari’s name?
Pay tribute to the great history.
Compared with simple and rude advertising, it is the best proof of our own products or technical strength to go through the test of harsh competitions and get excellent results. The name of this new car just announced by Ferrari is a tribute to the past years. For an automobile company that focuses on designing and manufacturing products that pursue speed limits, glorious history is their military badge.
● Enter the electrification era.
"0-100km/h acceleration time is 2.5 seconds, and 0-200km/h acceleration time is 6.7 seconds". I believe this is the information that most people remember after reading the introduction of SF90 Stradale. Hidden behind this figure is the unremitting efforts of the engineering team. The 3.9T V8 engine that just won the 2019 International Engine Award has made great contributions again, but this time it is not alone, but there are three motors to help.
For Ferrari, it’s not enough to just surpass the opponent, and the victory of the crushing level is what the Italians want. In order to achieve the goal, engineers further optimized the V8 engine with a cylinder angle of 90 degrees, including simple and rude ways to increase the cylinder diameter to 88mm and the displacement to 3990ml. There are also optimization measures to increase injection pressure and reduce flywheel diameter. It is also obvious that the exhaust manifold is changed from steel to Inconel.
The SF90 Stradale has absorbed the development experience of its predecessors. It is equipped with three motors, two of which are located at the front axle and the third is located between the engine and the gearbox at the rear axle. Although it is a performance beast, it can still travel 25km in all-electric eDrive mode. In this mode, only the front axle dual motors work. You don’t have to worry about their insufficient performance. You can easily push the vehicle speed to 135km/h with only two independent front motors, and you can feel the longitudinal acceleration of ≤0.4g in the process.
Only the further development of the engine can not ensure that the new car can fully achieve its goal, and the role of the gearbox in the powertrain is indispensable. SF90 Stradale uses a brand-new 8-speed dual-clutch gearbox based on the existing 7-speed dual-clutch gearbox, and the weight of the whole machine is reduced by 7kg. In order to lose weight, the reverse gear of this gearbox is cancelled, and the function is taken care of by the motor. In terms of performance, the performance of the new clutch with optimized materials is improved by 35%, and the torque can be transmitted as high as 1200N·m during gear shifting operation. In addition, the shift time is further shortened, which is 30% faster than the previous 7-speed dual-clutch gearbox, reaching 200 milliseconds.
For super-running, it is necessary to run fast, steadily and stand still. The solution given by engineers is to use electric drive and traction control system. In addition, the brand-new brake-by-wire system combines hydraulic and electronic braking through electronic control. In general braking state, the motor recovers braking energy to complete deceleration. In case of emergency, the hydraulic braking system will intervene to enhance the braking effect.
Of course, everything is a double-edged sword. The increase of motors and battery packs will lead to an increase in the weight of the whole vehicle. The arduous task before the engineering team is lightweight development. The solution is not difficult for you to guess. Using composite materials on a large scale can improve strength and reduce weight at the same time.
Thanks to the application of new materials, the strength has been improved while losing weight. From the data point of view, the torsional stiffness of the chassis is increased by 20% and 40% compared with the previous platform. In addition, the NVH characteristics have also been improved.
If these are not enough for you, it doesn’t matter, the Italians have prepared another optional version for you-Asset to Fiorano. On it, you can find the shock absorber, carbon fiber door panel, titanium spring and exhaust pipe built according to the racing experience, which will be 30kg lighter than the former. In order to ensure that the surging power output by the engine can be transmitted to the road as much as possible, engineers also put forward higher requirements to Michelin, a tire supplier, which finally provided Italians with a customized version of Michelin Pilot Sport Cup2 tire with softer texture and fewer grooves.
Full text summary:
Whether it is due to regulations or the internal combustion engine technology is close to the bottleneck. This time, SF90 Stradale became the real beginning of legalist school’s development to a higher level of electrification. Aside from emotional factors, the cooperation between the motor and the engine makes its overall performance stronger. For such a supercar with Ferrari logo, the only shortcoming you can find seems to be too expensive. (Text/Figure car home Tang Dynasty)
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