Turbocharger System Exhaust Bypass Valve

Abstract

The Environmental Protection Agency (EPA) is currently developing clean homogeneous charge compression ignition (HCCI) engine technologies. This concept requires high levels of intake pressure, which is typically obtained using twin turbochargers. At high engine speeds, the low-speed turbocharger is bypassed to prevent overspeeding. Dr. Andrew Moskalik, from the EPA, has asked us to design and build an exhaust bypass valve able to function at high temperatures and pressures with high efficiency in both the open and closed position.