Patent ID: 8333073
Filing Date: 2012-12-18
Classification: F01N,F02B,F02D,F02M,Y02T,Y10T

Abstract:
1. An internal combustion engine comprising an exhaust gas pipe for taking exhaust gases from a combustion chamber of the engine, an intake pipe for supplying air to the combustion chamber, a turbo charging system with a high-pressure turbine that interacts with a high-pressure compressor and a low-pressure turbine that interacts with a low-pressure compressor for recovery of energy from an exhaust gas flow of the engine and pressurizing of intake air of the engine, which high-pressure turbine is connected to the low-pressure turbine via a duct, and an exhaust gas pressure regulator located in the duct between the high-pressure turbine and the low-pressure turbine, wherein the exhaust gas pressure regulator is self regulating and opens automatically when pressure upstream of the exhaust gas pressure regulator is above a predetermined pressure, the exhaust gas pressure regulator comprising a piston centered on, arranged to move in a direction parallel to, and obstructing flow along an axial centerline of the duct to regulate a flow area of the duct.