Porsche, Lamborghini, Ferrari ... ... these ultra-running for most people are unfamiliar and familiar, even if not open, at least seen; even if not seen, whatever the outcome has heard. So, for the high-end ultra-running parts and everyone know how much? Do not worry, let us slowly to open their mystery, today we first talk about its braking system - carbon brakes.
Many people think that carbon ceramic brake discs are expensive, is to force the students, this is really a wrong idea.
Carbon ceramic brake technology
Carbon ceramic brake technology was originally used in the aerospace field. The first application in the United States F16 fighter aircraft.
Due to the aircraft landed on the aircraft carrier or land generated thousands of degrees of high temperature, ordinary metal material braking system is unbearable, there will be extended heat bolt will stop the braking distance. In the aircraft carrier's solution in the use of carbon ceramic composite brake technology to achieve high temperature environment to ensure that the same coefficient of friction and does not appear hot bolt hot melt phenomenon.
We will say that the aircraft carrier is not a cable to brake it, yes, although it is from the World War II began to have this solution, but can not guarantee the aircraft across the aircraft carrier runway and fall into the sea caused serious losses, and then this technology application To the civil aircraft. Automotive applications have been delayed for 30 years.
Carbon ceramic brake system
In the field of automotive brake from the asbestos material to the steel material era, the steel material brake has a difficult problem to solve, but also the vehicle in the high-speed or long-running process of heat generated by the increase in the thermal recession and extend the braking distance or Brake failure.
So naturally think of the use of carbon ceramic brake technology, the carbon ceramic brake disc from the air transfer to the land.
One of the salient features of the carbon ceramic brake system is that it is made of ceramic composite material. The carbon ceramic brake pads themselves and the friction layers on both sides are made of carbon fiber reinforced silicon carbide. The main matrix components are silicon carbide (SiC) and Industrial silicon (Si), carbon fiber (C).
Silicon carbide determines the hardness of the composite material, the role of carbon fiber is to improve the mechanical strength of the material and provide the material for the application of the required fracture toughness, ceramic composite with the same toughness shear fracture characteristics of its high heat load and mechanical load Performance provides protection. Thus, carbon fiber reinforced silicon carbide materials perfectly combine the physical properties of both carbon fiber reinforced carbon (C / C) and polycrystalline silicon carbide ceramics.
Carbon ceramic composites solve the thermal recession, but also have very excellent performance:
Compared with the traditional gray cast iron brake pads, carbon ceramic brake pads reduce the weight of about 60%, non-suspension quality reduced by nearly 23 kg;
Brake friction coefficient has a very high increase in braking response speed and brake attenuation reduced;
The tensile elongation of the carbon-ceramic material varies from 0.1% to 0.3%, which is a very high value for the ceramic material;
The ceramic disc pedal feels extremely comfortable and can produce the greatest braking force at the initial stage of the brake, so there is no need for brake assist to increase the system, while the overall brake is faster and shorter than the traditional brake system;
In order to resist high heat, there is ceramic between the brake piston and the brake pad to heat;
Ceramic brakes have extraordinary durability, if the normal use is life-free replacement, and ordinary cast iron brake discs generally use a few years to be replaced.
These features make carbon fiber reinforced silicon carbide the preferred material for high performance brake systems.
According to statistics, the use of carbon brakes, top sports car from the speed of 300km / h brake to static, only 4 seconds of braking time, the braking process of gravity acceleration can be more than 5G; and from 200km / h brake to static , Only 2.9 seconds, the brake distance of only 65 meters; from 100km / h brake to static, only 1.4 seconds, and 17 meters of the braking distance. It is worth mentioning that during this period the instantaneous temperature of the brake will reach about 1200 ℃. Able to withstand such a high temperature, and has a high coefficient of friction, which is a miracle of carbon ceramic brake disc.
Carbon ceramic brake disc application
Carbon ceramic car brake disc was first opened the mysterious veil, at the 1999 Frankfurt International Automobile Fair (IAA) on. The world's first car-mounted carbon ceramic brake system is Porsche. Porsche in 2001 will be carbon brakes as a matching equipment assembled in the 911GT2 sports car, 911C4S from November 2002 to provide matching, other well-known brands of cars have also begun through the use of this innovative braking technology to improve vehicle safety and Improve pedal comfort. Including Mercedes-Benz CL55AMG, Audi W12 & S8, Bentley, Bugatti and Lamborghini sports car and luxury cars, Ford also plans to use similar products.
The following bring the world's various brands of carbon ceramic composite brake system appreciation (pictures and data from the love car):
1: BREMBO
BREMBO there are two: CCB, CCM, the price of 12 to 16 million range, supply the world's leading automotive brands.
CCB is for - Volkswagen AG (Porsche, Audi, Bentley, Lamborghini, Bugatti) and AMG.
CCM supply - Ferrari, Aston Martin, Chevrolet, Lexus, Nissan Nissan, Pagani, Maserati, Jaguar, Alfa Romeo and McLaren (MP4-12C / 650S).
BREMBO price is the cheapest Chevrolet - Corvette carbon pottery, about 120,000 or so, the most expensive is the Ferrari, about 240,000. By the German SGL Group and Italy Bray Bo two joint venture production.
2: ALCON
High-end atmosphere, the price of about 250,000 yuan.
Alcon's carbon tray produced by the British ST.
3: AP
AP carbon pottery display at the SEMA show, is currently only seen in the F1, temporarily did not find civilian.
Production of the United Kingdom, (PS: the core technology may be derived from the Royal Air Force) for reference only, AP was also military.
4: fusionbrakes
From the United States, at present, FUSION PCCB brake upgrade kit corresponding to the main models to Audi R8, RS4 / 5, Porsche 996Turbo / GT series, 997Turbo / GT series and the latest 991Turbo / GT series, Lamborghini Gallardo before and after the period can be, GT-R corresponding products have also been available. The price is also a lot of money.
5: DACC
Origin from South Korea (South Korea)
PS: spy photos are not clear, the core technology comes from China
6: LEMTH Lema
China's automotive brake core technology brand, just debut for more than three years, is also the world and other brands to discuss cooperation, to provide OEM services.
Carbon pottery material itself, China has a relatively mature technology, and a complete production line, stable production of products. However, due to China's carbon tray research started late, relatively backward technology, carbon ceramic brake disc performance with foreign or there is a certain gap. Brake safety, the protection of the environment both mergers, lightweight trend is bound to lead the fourth revolution in brake technology.
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