DETAIL:

Sliding contact at a slight angle naturally induces vibration. Think chalk. 

Manufacturing tolerances for each brake component and for each vehicle’s hub-caliper mountings, accumulate at final vehicle assembly such that every caliper must be at a slight, unknowable angle that contacts the disc edge-first The result is brake NVH, with each brake having a unique NVH ‘signature’including some that squeal. 


Despite research over decades no universal ‘fix’ for brake NVH exists. Chamfers, slots and shims only work sometimes and only by chance. (see below)


My NuPad solution is to have a very slightly raised pad center such that the very first disc contact establishes an on-center-wear-plane, not from the perimeter as now, and at each caliper’s unique angle. This finally eliminates brake’s NVH source and, in turn, eliminates endless and expensive warranty claims to replace what are otherwise perfectly good brakes.


I have devised several NuPad solutions. I can convert samples of your existing pads to -NuPads- for your evaluation. I can also provide a method for evaluation. 


In addition to the primary NVH benefit, NuPad also reduces: polluting brake dust resulting from from grinding chamfers and slots; and the need for shims. 

NuPads are safer from larger friction surface area, cheaper (no grind operation) quieter, longer lasting from more friction volume, lighter from a possible smaller pad and plate and with less dust release in use from slower wear

                

In addition, NuPad is a ‘no-cost’ solution. Manufacturing and evaluation methods have been devised for confidential discussion.


The NuPad pending patent application, and new, yet to be filed applications, with world potential, are for sale. They offer the potential for decades of huge earnings from a small purchase price. New process patent application to be filed.


NuPad invention follows on my first brake invention BondFace, (now called NRS) sold to Nucap Industries who have sold over a billion NRS brake pad backing plates.


Contact: Winston MacKelvie, Inventor, (90+) 

winstonworks@me.com Tel 1-450-243-6850 Txt 1-450-330-4293 

www.inventure.ca

Some Background


Traditional friction chamfering is not a NVH fix but does reduce safety from its smaller contact area and increases pad wear from reduced friction volume, and increases toxic brake dust from faster wear, chamfering also results in brakes too big and heavy for what is functionally a smaller pad. Unneeded weight reduces EV range, fuel economy, performance, and handling. Brake shims are another no-fix (8 per car), that cost OEM’s more millions. 


Expert Quotes:

“Brake noise, even for vehicle manufacturers, continues to be the single largest brake warranty item, even after many hundreds of hours are spent on both brake dynamometer and vehicle to eliminate brake noises for each new vehicle platform,” observes Bob Peters chief engineer, friction material engineering with Akebono Brake Corporation. “The fact is that brake noise is nearly impossible to simulate on the computer and, consequently, most noise mitigation work is done on actual parts, using both special noise dynamometers and on the vehicle. This is expensive and time-consuming.” [and unsuccessful]

    https://thebrakereport.com/aftermarket-search-quieter-brake/

 

“In the last few decades, there have been extensive studies on analysis and investigation of disc brake vibrations done by many researchers around the world on the possibility of eliminating brake vibration to improve vehicle users' comfort. Despite these efforts, still no general solution exists.”

    https://www.researchgate.netpublication258725751


“Friction-induced vibration and noise emanating from car disc brakes is a source of considerable discomfort and leads to customer dissatisfaction. The high frequency noise above 1 kHz, known as squeal, is very annoying  and very difficult to eliminate.” 

    https://www.researchgate.net/publication/258994745_Recent_Studies_of_Car_disc_Brake_Squeal

   

“New Jersey lawsuit claims genuine Audi replacement brake pads and rotors are defective on Q7 model.

Audi Q7 squeaky brakes have caused a class-action lawsuit filed for all New Jersey  citizens who had brakes installed by Audi dealers between July 19, 2012, to the  present.”

“BMW was hit this week with a class action lawsuit over excessive brake squeal. In July, we reported that a similar law suit against Audi was settled.” The Brake Report Aug 8 2021

 Media News  

  

“In the last few decades, there have been extensive studies on analysis and investigation of disc brake vibrations done by many researchers around the world on the possibility of eliminating brake vibration to improve vehicle users' comfort. Despite these efforts, still no general solution exists.”  

www.researchgate.netpublication258725751 


“…. I hate brake squeal, I actually have an existing noise on my truck, tried 2 sets of different pads and rotors front and back and still can’t get rid of the noise!”

    J. Dutton, Florida, Auto parts salesperson