1 Increased Heat Dissipation & Increased Thermal Capacity – Brembo High-Performance Brake Rotors are uncompromisingly well designed. One of if not the greatest performance attribute of a Brembo Brake Kit, is the fact that it includes Cross Drilled, Slotted or Type 3 Slotted, Vented Curved 48 Vane Brake Rotors.Now, you’re probably asking yourself what is a Ventilated Brake Rotor, and what does it do? First, you need a greater understanding of how your Brake System functions before you can truly appreciate the benefits of Ventilated Brake Rotor. When you press your Brake Pedal, a series of events occur that allow you to stop your vehicle. When the Brake Pedal is pressed, hydraulic fluid is pushed against the piston. This, in turn, forces the Brake Pads into contact with the Brake Rotor. The frictional forces created by the Brake Pad and Brake Rotor making contact retard the rotational movement of your Car or Trucks axle, thereby slowing down or stopping your vehicle. The Kinetic Energy of your vehicle is transformed into heat. This heat is then absorbed by the Brake Rotors and Brake Pads. Frictional Heat generated by the interface of the Brake Discs and Brake Pads can cause your Brake System to overheat, fade (the temporary or complete loss of braking capabilities due to overheating) and possibly fail. Brake Systems fail most often due to overheating, here’s why; High-Temperatures cause Brake Systems to fail because the heat generated by your Brake System exceeds its heat rating. Brake System failure comes in many forms such as Brake Fade, Local Scoring, Thermoelastic Instability, Premature Wear, Brake Fluid Vaporization, Bearing Failure, and Thermal Cracking. Gao and Lin (2002) – Stated that “Contact temperature is a fundamental factor reflecting the specific power friction influence of the combined effect of Load, Speed, Friction Coefficient and Thermophysical and Durability Properties of the materials of a frictional couple. “– What does this excerpt mean for you, well simply put a Brake System or more Specifically a Brake Rotor with greater heat dissipation will have lower contact temperatures when compared to stock Brake Pads and Brake Rotors. This, in turn, reduces the chances of Brake Fading, Local Scoring, Thermoelastic instability, and Thermal Cracking. Disc Brake Systems are subjected to three primary types of mechanical stress;
- Traction Force – Traction Force is created by the centrifugal effect of the rotation of the wheel and Brake Rotor. Traction force occurs while the vehicle is moving and no braking force is being applied.
- Compression Force – Compression Force occurs as the result of force exerted by the Brake Pad pressing perpendicularly onto the surface Brake Rotor causing the Brake Rotors rotation to slow. This causes your vehicle to slow down or stop.
- Frictional Force – Frictional Force occurs when the Brake Pad rubs against the Brake Rotor. Because your Brake Rotor may be spinning at significant RPM’s (revolutions per minute) this action generates a significant amount of heat.
There are two basic types of Brake Rotors; Full Brake Rotors and Ventilated Brake Rotors. Full Discs were designed to be cost effective and are mass produced. Full Brake Rotors are comprised of a full crown connected to a bowl which is attached to the hub of the vehicle. A consequence of Full Brake Rotors is that they’re of a simple geometric shape. This simple geometric shape is prone to having poor heat dissipation, poor thermal capacity and is also prone to cracking.Ventilated Brake Rotors are of more complex geometric shapes have better performance attributes when compared to Full Brake Rotors. Ventilated Brake Rotors are composed of two crowns. These crowns are called flasks, which are separated by fins. Because of their design, Ventilated Brake Rotors have better cooling properties than Full Brake Rotors, the ventilation between fins increases airflow, promotes convective heat transfer by increasing the exchange of surface discs. Because Ventilated Brake Rotors have better cooling properties, they’re less prone to failure when compared to Full Brake Rotors. Especially when driving high speeds and braking aggressively for sustained periods of time.
Here’s why Brake Rotor Ventilation is so important;
The Brake Rotor consumes the major part of the heat during friction coupling (when the brake pads contact the brake rotor to retard is rotation, and slow or stop it) usually greater than 90%. This is why Brake Rotors with greater cooling properties (for example brake rotors that have vanes) perform better than Brake Rotors that have poor cooling attributes.Now that you have a rudimentary understanding of Brake Rotors and Brake Rotor Ventilation, we’re going to dive deeper into what makes Brembo Vented Curved 48 Vane Rotors so unique. The shape of the vanes greatly influences the air flow speed through the Brake Rotor, as well as the pressure that will occur due to air flow through the disc. The larger the amount of air that can pass through a Brake Rotor, the cooler that rotor will be. Galindo-Lopez and Trovic concluded that if one or more vanes are added between existing vanes, the cooling properties of the Brake Rotor will increase because there are a greater number of surfaces to be cooled. In addition, the rate of the Brake Rotor cooling would also increase.
Brembo’s Vented Curved 48 Vane Brake Rotors were designed to increase Brake System performance here’s how they do it;
- Vanes in the Brake Rotor allow for better airflow which in turn allows for better heat dissipation.
- Better Brake Rotor airflow lowers contact temperatures this ensures a lower overall rotor temperature. This is pertinent because it will keep your Brake System from fading, overheating and reduces thermal stress on the brake system.
- During periods of sustained driving at high rates of speed Brembo’s Vented Curved 48 Vane Brake Rotors will continue to stay cool even during tight or hard cornering ensuring you maximum control over your vehicle.
, In Conclusion, the most significant advantage to High-Performance Brake System or Big Brake Kit is not its stopping power. But instead its ability to dissipate, this is what allows to drive at high speeds on the race track or winding road and repeatedly brake aggressively with no issues.
2 Highly Technical Design – This is what really makes Brembo High-Performance Brake Systems stand out in a highly crowded marketplace. Brembo Brake Systems go through a series of rigorous tests before they’re ever considered road worthy.Every year Brembo conducts more than 150 tests on the track and covers a distance of 1 million Kilometers (621,000 miles) in road testing, spends 350,000 man-hours testing their Brake Systems utilizing test benches and 200,000 man-hours on-road testing their brake products to ensure the highest levels of quality for their Braking System Products.
Brembo utilizes a multi-step approach to test their products;
Static test benches are the first test Brembo utilizes. This step is crucial in the processes of design, experimentation, and production. This testing phase determines how the Brake Systems will be produced.Brembo utilizes static test benches to ensure their braking products meet or exceed design specifications. These braking products are then subjected to load cycles (Pressure and Braking Torque) which are greater than physically applicable in the real world. Brembo then tests their products on dynamic testing benches. Dynamic Testing Benches allow vehicle dynamics to be simulated through mass and speed. Brembo’s Dynamic Testing Benches were designed in-house to operate autonomously 24-hours a day, 7-days a week. This process allows for development time to be reduced significantly. Brembo is also capable of simulating all approved race tracks in the world, for cars and motorcycles. This allows for Brembo’s products to be pushed to their limits during the testing phase. Brembo Test Benches are also designed to test for NVH (Noise Vibration and Harshness). By testing for these NVH, Brembo develops quitter brakes that vibrate less. Brembo also utilizes Roller Benches (rolling roads) for Cars, Trucks, and Motorcycles. Brembo’s roller benches allow vehicles to reach speeds up 250 km/h (155.343 mph) at temperatures between -30 to 40 ◦C (-22 to 104 ◦F). This Roller Bench allows Brembo to simulate real-world conditions like snow, wet roads, and high speeds. This rigorous and exhaustive testing ensures that Brembo Brakes will stand up to the test of time whether you’re driving on the Street or Track. Brembo Products that are validated on the Static Test Bench, Dynamic Test Bench and Roller Bench (Rolling Road) are then tested on vehicles provided Vehicle OEM vehicle manufactures whom Brembo has direct working relationships. Brembo has an internal team dedicated to testing performance (track testing), comfort, and duration (road testing). Brembo tests its products in full compliance with highway codes. Driving tests include: superfading this test requires an appropriate sequence of braking from sustained speed to zero in full load conditions, an assessment of comfort and feeling (This testing is carried by drivers and who riders who have in-depth knowledge of vehicles and products) and efficiency on wet and dry surfaces.
3 Brembo Brake Systems we’re designed for the highest possible levels of performance – Brembo brings race technology to the streets. A Brembo High-Performance Brake System will give your vehicle best possible braking performance money can buy.
Here are some the most exceptional features of Brembo High-Performance Brake Systems;
Two-Piece Floating Brake Rotors - Brembo Two-Piece Floating Brake Rotors are perfect feature aluminum alloy hat that reduces un-sprung mass which improves handling as well as thermal stress. Brembo’s mounting system was engineered to permit a greater degree of radial and axial float.These characteristics, in conjunction with greater Brake Rotor surface area, improve the dissipation of heat, generated by the repeated and intense thermal stress the brake rotors are subjected to during high-performance driving. In fact, Brembo’s exclusive venting system not only improves cooling capacity but also increases resistance to cracking caused by thermal shock over 40%. Another important reason Two-Piece Brake Rotors are advantageous is the fact that they allow a small degree of flex preventing Brake Rotor Damage due to heat expansion. Brembo’s Radial Mounted Fixed Brake Calipers utilize 4, 6, or 8 Piston Layouts. A common misconception is that more pistons equal more stopping power. While this is partially true, here are the real advantages to multiple Piston Brake Caliper layouts. Multiple Brake Caliper Pistons give your vehicle more stopping power, by creating a larger footprint on the rear of the Brake Pad. This larger footprint means the entire Brake Pad is pressed evenly against the Brake Rotor ensuring a more precise and even friction coupling (When the pad touches the rotor).
What makes Brembo’s Fixed Brake Calipers so unique?
The most significant advantage in utilizing Fixed Brake Calipers is the fact that fixed brake calipers have pistons on both sides of the brake rotor. The result is more even Brake Pad wear, a firmer brake pedal feeling and stronger friction coupling between the Brake Pad and Brake Rotor. This means more Braking Torque and More Stopping Power.Increased Braking Torque – When you press the brake pedal, that force is converted to energy by your vehicles master cylinder. That energy is then carried by brake fluid to the Brake Calipers Pistons which puts pressure onto the pistons. This pressure forces the pistons outward pushing the Brake Pad against the Brake Rotor. This series of events is what stops your vehicle. Brembo Brake Calipers were specifically designed to bite down on Brake Rotors. As stated in the aforementioned section, Brembo Brake Calipers feature 4, 6, or 8 Piston Layouts. Brembo’s opposed multiple pistons contact the Brake Pad with more precision and more even footprint. This is because of the small Piston Diameter and the reduced pressure exerted on each individual piston for a more even braking load. The result is a Greater Braking Torque, uniform Brake Pad Wear. Which in turn will give you better driving performance.
References & Sources Cited
- Brembo.com Article – Testing – A Million Killometers for Perfect Braking Click here to view article
- Brembo.com Webpage – GT Braking Systems Click her to view the webpage
- Brembo.com Webpage – Sport Line Click here to view webpage
- Numerical Investigation of Fluid Flow and Heat Transfer Characteristics on the Aerodynamics of Ventilated Disc Brake Rotors Using CFD. | Authors – Thundil Karuppa Raj RAJAGOPAL*, Ramsai RAMACHANDRAN,
Mathew JAMES, and Soniya Chandrakant GATLEWAR | School of Mechanical and Building Sciences, Vellore In | Original scientific paper
DOI: 10.2298/TSCI111219204R | Author Contact Info – email: [email protected] | Click here to view publication | Publish Dat 2014
- Thermal analysis of both ventilated and full disc brake rotors with frictional heat generation | Authors – A. Belhocinea,∗, C.-D. Chob
, M. Noubyc
, Y. B. Yid, A. R. Abu Bakare | Author & Contributor Information – aFaculty of Mechanical Engineering, USTO Oran University 31000 Oran, Algeria, b
Department of Mechanical Engineering, Inha University, Incheon, 402-751, Republic of Korea, c
Department of Mechanical Engineering, Faculty of Engineering, South Valley University, Qena-83523, Egypt, dDepartment of Mechanical and Materials Engineering, University of Denver, 2390 S York St Denver, CO 80208, USA, eDepartment of Automotive Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai, Malaysia | Publish Date Info – Applied and Computational Mechanics 8 (2014) 5–24, Received 3 March 2014; received in revised form 27 June 2014 | Click here to view publication
- : Ali Belhocine, Abd Rahim Abu Bakar & Mostefa Bouchetara (2016) Thermal and structural analysis of disc brake assembly during single stop braking event, Australian Journal of Mechanical Engineering, 14:1, 26-38, DOI: 10.1080/14484846.2015.1093213 | Click here to view this article
- Shah, Rathin & Shah, Chinmay & Thigale, Swapnil. (2017). Design and analysis of a hydraulic Brake caliper. International Journal of Mechanical Engineering and Technology. 8. 33-41. | Click here to view article
- Stojanovic, Nadica & Grujic, Ivan & Glisovic, Jasna & Saša, Vasiljević. (2019). STUDY THE EFFECT OF VANES SHAPE ON THE CONVECTIVE COOLING OF THE VENTILATED BRAKE DISC. | Click here to view article