|BorgWarner’s new electric butterfly EGR valve technology will debut with a leading commercial engine manufacturer in 2010. Click to enlarge.|
BorgWarner is introducing an electric butterfly EGR (exhaust gas recirculation) valve for diesel applications. The EGR valve was developed to deliver precise, responsive flow control combined with high flow capability, excellent sealing, corrosion resistance and reliable operation in the most severe operating environments. The technology will debut with a leading commercial engine manufacturer in 2010.
Recirculating exhaust gas and combining it with an air and fuel mixture reduces the combustion temperatures that produce NOx emissions. New engine concepts for commercial diesel vehicles require greater use of state-of-the-art EGR systems to meet ever stricter emissions standards, according to Roger Wood, BorgWarner Engine Group President.
BorgWarner’s electric butterfly EGR valve features a brushless DC motor actuator with a gear train that has already proven its robustness and reliability in turbocharger applications. The brushless motor offers high durability and enhanced power-to-weight ratio.
Sensors within the motor provide feedback to a closed-loop control system to position the valve and ensure precise control of recirculated exhaust gas. All major components, including the housing and valve, are built with stainless steel to resist corrosion. The butterfly valve design provides excellent sealing and reliable operation within the harsh diesel exhaust system environment.
In addition to commercial diesel engine and vehicle applications, BorgWarner’s butterfly EGR valve can also be applied to diesel passenger car applications and is easily integrated with an EGR cooler and cooler bypass valve.
BorgWarner Turbo & Emissions Systems is a leading global producer of turbochargers, exhaust gas recirculation valves and other engine air management systems for passenger cars, light trucks and commercial vehicles. These systems are designed to improve fuel economy, reduce emissions and enhance vehicle performance.