NEW YORK — The vehicle industry's quest for quieter cars is driving demand for noise-dampening components, a development Pirelli Tyre is meeting with tire technology it claims reduces road noise by up to 25 percent.
Introduced in 2013, the Pirelli Noise Cancelling System (PNCS) uses a sound-absorbing polyurethane foam attached to the tire's innerliner, which absorbs vibrations produced when air inside the tire is compressed as the tire is squashed against the road. This noise is transmitted from the tire to the wheel hub and eventually reaches the inside of the car's cabin via the steering and suspension components.
From a couple of fitments that year with German car maker Audi A.G., homologations of PNCS-equipped tires grew to 78 in 2017 and doubled last year to over 150, Pirelli said.
Tires equipped with this technology carry special markings on the sidewall, which depict a speaker and soundwaves with a bar through them, next to the PNCS symbol.
Owners of vehicles equipped with PNCS technology are advised to always buy appropriately marked tires specifically made for their cars, in order to continue to enjoy the advantages. Pirelli also notes that maintaining the correct tire pressures also helps to contain road noise.
This sponge used is an open-cell foam that maximizes the working surface of the material, intensifying the deadening of vibration and therefore reducing noise, Pirelli said.
"Alongside tire development, Pirelli also works every day on technology designed to improve the lives of each and every motorist: Run Flat and Seal Inside minimize the risks associated with punctures, while PNCS improves comfort on journeys," Maurizio Boiocchi, Pirelli's executive vice president of technology and innovation, said.
"These specialties are much in demand from premium and prestige car makers, helping to ensure the highest standards of quality."
Of Pirelli's 3,100 OE homologations, more than 770 are linked with one or more of these specialties, the company said, and more than 720 are marked tires that identify the actual car manufacturer.