The first thing that caught Zhang Lan's eye was a variety of dense mechanical and electronic equipment in the engine compartment, the original all-aluminum 3.6-liter V-shaped six-cylinder naturally aspirated engine has been improved beyond recognition, although I don't know what the internal structure has been changed, but the intake and exhaust system, circulating cooling system are all very different from the original "Snow Leopard" off-road vehicle, and the two turbo increases seem to be proudly declaring their existence.

The huge air intake head and two sets of turbocharging devices made Zhang Lan immediately feel the excellent improvement of this car's power performance. All kinds of carbon fiber parts are all over the engine compartment, on the top, two engine compartment balance bars composed of carbon fiber rods, showing Zhang Lan the extraordinary stability of this car: ordinary cars are not equipped with engine compartment balance bars at all, ordinary modified racing cars are only equipped with one, this car is actually equipped with two in front of the engine compartment, and it is a lighter weight, higher strength carbon fiber material, I really don't know how stable this car will be after running.

"What is the maximum power and maximum torque of this engine?" Zhang Lan asked.

"The maximum power is 298 horsepower, and the output is output when the engine speed reaches 5,500 rpm," said Xiao Chenxi, "and the maximum torque is 510 Nm. m, this data can be said to be the best of all the cars at present, the weight of the whole vehicle is 1811 kilograms, which meets the 1750 kilograms stipulated by the organizing committee, of course, we have a 500-liter large built-in fuel tank, although this guy is an oil tiger, but don't worry too much about feeding it. ”

Zhang Lan nodded, there is a reason why there is such a huge difference in the power and torque of this car, the off-road vehicles participating in the Dakar Rally are different from ordinary rally cars, although the requirements for power are also very high, but relatively speaking. Because for the Dakar car, which runs in the desert for the vast majority of the stage, there is very little opportunity to increase the speed of the car to more than 200 kilometers per hour, and the relatively low power is acceptable; But on the contrary, the requirements for torque output are more important than ordinary rally cars, because the cars participating in the Dakar Rally need the engine to always maintain a strong explosive force, and the strength of the engine's explosive power is directly related to the torque output of the engine.

"Looking at the paint on the ground, it seems that the main structure of the body has not changed much," Alice said proudly. "In fact, the chassis and body structure of the whole car have all been replaced with an aviation tensile steel pipe welded truss structure, which is not only lighter, but also has higher strength, better ductility and stronger resistance to twisting! plus the way of honeycomb structure flooring. It is guaranteed to reduce the weight of the car floor even further! ”

"Of course, in order to further strengthen the body chassis. Lightweight carbon fiber chassis balance bars are a natural must-have. Alice continued to introduce Zhang Lan, proudly looking like she was introducing the most proud child to others, "In addition. All parts of the body are made of carbon fiber, not only the main structure of the body, but even the doors are made of carbon fiber materials to ensure that the car can reduce weight to the greatest extent! The built-in roll cage is also made of reinforced carbon fiber construction, and the body is connected together to ensure the strength of the body and the roll cage. As for how many carbon fibre parts are used, you just have to open the door and take a look. ”

With Alice's words. The doors were slowly opened. Zhang Lan glanced inside, and suddenly sweated wildly: I haven't paid attention to it outside. But opened the door and got into the eye. The unique glaze-like color of the carbon fiber material can be seen everywhere, and even the main material of the center console has been changed to carbon fiber. In addition, a variety of electronic devices are densely packed throughout the center console, especially in front of the navigator, and it is also full of various satellite navigation devices and electronic compasses and other navigation equipment necessary for racing cars when driving in the desert.

The special racing car small-diameter steering wheel and racing flame-retardant five-point safety seat make the car in front of you just a dozen eyes, and a strong professional racing feeling hits you. Looking back, there are no more second-row seats on the original three-door Snow Leopard off-roader, replaced by a huge fuel tank sandwiched between the roll cages!

"And that's not all, the gearbox uses a 6-speed Ricardo-type sequential semi-automatic gearbox with a mechanical direct gear selector;" Looking at Zhang Lan's surprised look, Alice's little vanity in her heart was greatly satisfied, and she was able to surprise Zhang Lan, indicating that her efforts during this time were not in vain, and she continued to introduce to Zhang Lan proudly, "The driving mode still inherits the constant four-wheel drive system of our Snow Leopard 3.6-liter off-road vehicle, using a higher strength mechanical center differential lock, and the front and rear Xtrac automatic locking differentials. In terms of the design of the suspension system, the front and rear axles adopt a double wishbone design, and each wheel adopts a double-spring double-suspension structure with a new hydraulic anti-roll bar system; As for the design of the avoidance system of the whole car, this is also what we are most proud of: we have adopted a two-way soft and hard adjustable Donerre suspension, which is by far the most comfortable suspension device, at least to ensure that the driver is not too sad at high speeds! ”

After looking at the internal structure of the body, Zhang Lan retracted his head, and then noticed that the roof was no longer the straight roof structure of the original "Snow Leopard" off-road vehicle, but a large arc-shaped roof similar to that of the company car. Instead of having one or two huge fins, as is the case with the cars that are now competing in the Dakar Rally, one or two huge definite wings are all the rage.

It is clear that in terms of aerodynamic design, the Alice "Snow Leopard" racing car is far ahead of the cars of its era.

This new type of small and multiple fixed wind wing structure has not appeared in the previous Dakar Rally, Zhang Lan thought, if he is not mistaken, this aerodynamic structure should have first appeared in the Volkswagen Touareg racing car in 200 years, and then this unique structure with its excellent aerodynamic characteristics, will immediately become popular in the Dakar Rally car group cars. ,

"The cooling system has been specially strengthened to ensure that the engine can maintain sufficient heat dissipation efficiency in the hot desert, even in hot weather above 50 degrees Celsius, which is enough to ensure the normal operation of the engine," said Alice. The horsepower of the engine increases, so that the rigidity of the original girder of our car is not enough to cope, coupled with the undulating desert terrain, the degree of strain in a day when driving at high speed is more severe than running on the medium-speed highway for a year, if the girder is not handled well, maybe the car will have structural problems halfway. ”

Zhang Lan knows that the Dakar Rally is different from ordinary rallies and endurance races, and the reason why the Dakar Rally has such a special status in the world is related to the racing path chosen for this event: because there are almost no roads where this event has been driven! That's just that, and what makes all the riders even more troublesome is that all the routes are rugged and difficult, and the steel beams are constantly twisting in the process, which can easily lead to metal fatigue and often weld cracks.

So the Dakar's racing girders had to be improved and strengthened before the race. In addition to effectively ensuring the safety of the rider, the well-designed body roll cage can also play the role of auxiliary girder and improve the overall frame rigidity.

"We designed the roll cage to be welded directly to the upper layer of the body girder, and the front, middle and rear parts of the roll cage are connected to the girder, so as to form a double-layer beam, which can greatly improve the torsion and folding resistance of the frame in the rugged desert." Seeing that Zhang Lan was interested in this, Xiao Chenxi explained to him on the side.

Zhang Lan nodded, as if this design was also the most popular design for the cars that participated in the Dakar Rally in later years. This kind of design that combines safety and performance was welcomed by racing drivers as soon as it appeared, but Zhang Lan felt a little funny: Is this design still popular because of herself?

"As for the modification of the suspension system, because the more uneven the ground and the higher the speed, the longer the suspension travel must be, so as to offset the impact caused by high-speed driving, so for the suspension modification of our racing car, the first thing is to increase the suspension travel and strengthen the corresponding suspension parts." Alice added, "Because the front suspension of our car is independent, the A-arms of the body will not only be reinforced, but also lengthened to increase the travel. After the A arm is lengthened, the rocker arm angle is smaller than that of the short A arm under the same stroke, so that the power output of the transmission half shaft is more direct, and the driving stability is also increased. ”

I sweat! Zhang Lan opened her mouth and was a little speechless, are these professional designs really something that these two girls who claim to have a deep understanding of machinery can come up with? Feelings themselves have been underestimating their abilities before? It's low-key! pretending to be a pig and eating a tiger, I didn't expect these two girls to pretend to be a pig and eat a tiger and almost ate themselves.

"In addition, the hard axle housing had to be welded to prevent axle deformation during high-intensity driving twisting. For the differentials, we use a large-ratio anti-slip differential (LSD) and for insurance, we also install a fully lockable differential lock to deal with wheel slippage in extreme situations. Xiao Chenxi followed what Alice said and added it to Zhang Lan.

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