Exhaust System Adaptive Valve
Faurecia Emissions Control Technologies
2016 - PACE Award Winner
What: Less exhaust noise, better fuel economy
Innovation: Faurecia has developed a device for mitigating undesirable low-frequency exhaust noise that results when automakers use fuel-saving technologies such as cylinder deactivation and multispeed transmissions. The Exhaust System Adaptive Valve is a spring-loaded, self-regulating valve that presents exhaust gas flows with a variable restriction, suppressing low-frequency acoustic energy. This innovation allows automakers to extend the range of the cylinder-deactivation mode, further improving fuel economy.
First Customer: General Motors
Judge's Citation: Driven by CAFE fuel economy requirements, OEM's have incorporated fuel saving technologies such as cylinder deactivation and high gear count with lower displacements. These strategies present challenges of increased low frequency noise that is readily apparent unless additional measures are taken. Unlike traditional approaches Faurecia's Adaptive Valve™ enables fuel-saving powertrain strategies while offering refined NVH with reduced package space (10-15L) and system mass (5-10 Kg). The Adaptive value addresses NVH concerns by presenting gas flow with a variable restriction. This suppresses low frequency acoustic energy. This extends the operating range of the cylinder deactivation mode, yielding further improvements to fuel efficiency beyond what is possible without the value. It also eases the transition in and out of cylinder deactivation modes, making it imperceptible to vehicle occupants. The Adaptive Valve™ was initially launched on General Motor's Full Size Hybrid. Other products and OEMs are adopting the Adaptive Valve™ technology.
<Web site: faurecia.com