EGR Emission Control Exhaust Valves

NO_x emission reduction using Exhaust Gas Recirculation (EGR)

Benefits of Low Pressure (LP) EGR over conventional High Pressure (HP) EGR

• No scavenging means increased turbo effectiveness and increased efficiency
• Easier Re-circulation at high loads with variable-geometry turbocharger
• Larger particulate matter

Long Loop EGR using Helical’s Low Pressure (LP) EGR Valve

• High turbo effectiveness & high MPG
• EGR already been filtered via DPF
• Can be used in conjunction with High Pressure Loop (HP) EGR

Helical’s Low Pressure (LP) EGR Valve

• Fast response <170 milliseconds both directions
• Can be made to various diameters
• Robust design and quiet operation

Acoustic Exhaust Valves
EGR