Content provided in partnership with

Automotive Industry

Quieting turbodiesels - WIP - Hydra L.L.C. improves the sound of turbodiesel engines - Brief Article

Automotive Design & Production, Jan, 2002

One of the knocks on diesels is that they are comparatively noisy. Especially turbo-diesels. This is a direct result of vibrations that are transferred From the engine through the muffler and exhaust system. According to Kurt Kushner, general manager of Hydra LLC [Warren, MI], "The turbines in turbo engines inherently have some degree of vibration. It is expensive to eliminate turbocharger noise at its source by replacing vibrating turbines with higher quality, non-vibrating ones. The second option, to redesign the muffler and the exhaust so they don't generate noise, typically increases the muffler's size and the car's weight."

Most Popular Articles in Autos: Service Slants; 2007 utility vehicle buyer's guide: Side-By-Sides are popular; here's who ...; Transmission considerations: beyond the manual gearbox; Buell Motorcycle engineering, innovation, & dedication: in an industry ...; 100 + 10: America's oldest automotive magazine celebrates its 110th year ...; More »

Such noise would be exceedingly unsettling to customers of the 2002 Mercedes 5-Class V8 turbodiesel, so Hydra's parent company, Witzenmann GmbH, worked with DaimlerChrysler to develop a stainless steel decoupling element, the KSE, that's fitted between the exhaust system and the turbocharger. There is an internal tube for exhaust gases surrounded by corrugated, multi-layer bellows. Then a wire mesh ring is wrapped around it to provide further noise muffling.

Automotive Industry

Quieting turbodiesels - WIP - Hydra L.L.C. improves the sound of turbodiesel engines - Brief Article

Automotive Design & Production, Jan, 2002

Find Research Guides for:

Find Featured Titles for: Autos

Most Popular Articles in Autos

Most Popular Publications in Autos