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In the future, cars will drive autonomously; thanks to predictive maintenance, car repair shops can fix possible engine problems before they occur, and thanks to networked tires they can even monitor the condition of the tires. But if a flat tire occurs, then jacks and breakdown kits are required. Self-repairing tires can help in many cases. Michelin's Selfseal technology makes tires even more intelligent and ensures that tires repair themselves in the event of a breakdown - while on the move.
The Selfseal technology!
Despite their robust construction and resilience, tires are not immune to punctures. A nail, screw, or small, sharp-edged piece of metal that drills into the tire while driving, and the journey is suddenly over. Sometimes so abruptly that dangerous situations can arise. Tires that repair themselves the moment the breakdown occurs can prevent such situations and make road traffic safer.
Is not there? Yes, there is! With MICHELIN® Selfseal®, Michelin has developed a technology for cars, off-road vehicles, vans and small trucks that can close holes in the tread immediately - at the moment the hole is made. In conjunction with modern tire pressure monitoring systems and the trend towards networked tires using RFID technology, a system is created that makes driving even safer and more reliable. This is especially true for autonomous driving, because what could be better for the driver of a vehicle in self-driving mode than for the tire to repair itself with a broken nail while driving. The journey can be continued safely and the tire can be expertly checked by a tire specialist at a later point in time.
Tires with self-seal technology do not have to be changed prematurely after a puncture breakdown and can be used until the end of their service life. This should be of particular interest to fleet operators and commercial vehicle use, because thanks to Selfseal technology, freight forwarders, parcel service providers and craft businesses can reduce vehicle breakdowns. This increases efficiency, saves resources and saves money.
"The slightly higher tire weight has no negative effects on the rolling behavior of the self-seal tires and thus on the driving characteristics of the car. On the contrary: the higher mass on the tire tread ensures smoother running.“Mark Perbaums, Executive Vice President Sales Original Equipment at Michelin
A hole is not a hole!
The heart of Michelin's Selfseal technology is a thin layer of a tough sealant based on natural rubber. The layer, which is only a few millimeters thick, is applied to the inside of the tread. If a nail or screw pierces the tire and the sealant, the internal pressure of the tire presses the viscous mass against the foreign body as soon as it penetrates. The air in the tire cannot escape, the tire pressure remains constant. The Selfseal technology ensures that the hole in the tire is reliably sealed and repaired before it occurs. If the foreign body falls out while driving or is removed, the sealant "presses" immediately and closes the tire reliably. Self-seal tires seal around 90 percent of all punctures by nails and screws on the tread up to a diameter of 6 millimeters *.
Less weight, same performance, more space!
The built-in self-seal strip makes the individual tires a little heavier, but overall this technology saves overall weight, because vehicles with self-seal tires do not need a spare wheel or breakdown kit. And that has a positive effect on fuel consumption, because a conventional spare wheel in the trunk increases fuel consumption by up to 0,2 liters per 100 kilometers.
“The slightly higher tire weight has no negative effects on the rolling behavior of the self-seal tires and thus on the driving characteristics of the car,” says Mark Perbaums, Executive Vice President Sales Original Equipment at Michelin. "On the contrary: the greater mass on the tire tread ensures smoother running." MICHELIN tires are upgraded with Selfseal technology on a special assembly line at the Bad Kreuznach location. The sealing compound strip is introduced there using a high-precision process. Michelin offers the Selfseal technology in common summer and winter tires such as the MICHELIN Primacy 4 or the MICHELIN Alpin 5.
The future of puncture protection - already a reality today!
The Selfseal technology also has advantages for car manufacturers: Not only does it offer their customers more safety and comfort, they no longer have to install a spare wheel recess in their vehicles and are therefore more flexible when planning new space and technology concepts. Numerous international automobile manufacturers are already equipping new vehicles with self-seal tires and are thus relying on Michelin technology "Made in Germany".
And the Selfseal technology is also finding its way into the original equipment of autonomous vehicles: NAVYA, a manufacturer of autonomous, driverless and electric shuttle buses, is using Michelin's puncture protection solution for the first time in a light truck with the MICHELIN Agilis CrossClimate Selfseal® tire. The future of puncture protection is already a reality today.
Of course, that wasn't the end of it!
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