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BorgWarner launches new silent chain for Hyundai, KIA GDI engines

ABR Staff Writer Published 13 September 2011

BorgWarner has launched its new silent chain for the balance shaft drive on Hyundai's Theta II four-cylinder gas direct-injection (GDI) and turbo-GDI engines, which power the Hyundai Sonata and Kia Sorento, K5 and Sportage for the US and South Korea.

The new silent chain are designed to withstand the harsh environment and stresses of GDI engines, it delivers lower noise, vibration and harshness (NVH) and greater durability compared with roller chain systems for balance drive applications.

BorgWarner Morse TEC president and general manager James Verrier said the company's new silent chain technology enables GDI engine designers to take advantage of a simplified balance shaft drive system with lower cost, lower noise and better durability than roller chain drives.

"BorgWarner engineers are constantly innovating new technologies to improve engine efficiency and performance. We are pleased to launch this new silent chain with Hyundai and Kia," Verrier said.

The shaft drives are used to help reduce engine vibration, when the inline engines lack the inherent stability of the V-shape in V6 and V8 engines.

The new silent chain features an inverted tooth profile that reduces surface pressure for added wear resistance.

Compared with roller chain drives, the company's silent chains for balance shaft drives enable a lower-cost balance drive system capable of running at higher speeds with the benefits of both lower NVH and greater durability.

In addition to the new silent chain, the company also supplies balance shaft drive components including the tensioner, control arms and guides.