ERJ staff report (DS)
Weinheim, Germany - Vibracoustic said it has developed a new system to improve comfort when fuel-management systems start and stop the engine to save fuel. The solution on offer: a decoupled pulley with mechanical overrunning clutch.
In modern engine systems, the engine is stopped as the vehicle comes to a standstill and is then started again as it moves on. However, this eco-friendly technology causes annoying noises and vibrations which can irritate the passenger of a vehicle over the course of time, especially when stop-and-go traffic.
The Vibracoustic solution is to fit a soft elastomer spring between crankshaft and belt drive, to decouple annoying crankshaft vibrations at low engine speeds and a mechanical overrunning clutch to eliminate the severe vibrations which arise as the engine is restarted and the vehicle moves on.
Stefan GrÃ¤ber, Head of Business Development in the Torsional Vibration Damper Division, says: "Our product combines the outstanding insulation properties of a standard decoupled pulley in stationary operation with a mechanical overrunning clutch function during engine start. This system extends the durability of all belt drive components and ensures silent, vibration-free operation when the engine is started again by the fuel-saving start-stop system."
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Press release from Vibracoustic