Pumped egr system

F - Mech Eng,Light,Heat,Weapons – 02 – M

Patent

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F02M 25/07 (2006.01)

Patent

CA 2403498

An exhaust gas recirculation system for an internal combustion engine includes an exhaust manifold (50) and at least one exhaust flow control valve (41, 42, 43, 44) located between the engine and the exhaust manifold (50). The exhaust flow control valve (41) diverts a portion of the exhaust gas from each cycle of one cylinder (31) and feeds that diverted portion to another of the cylinders (32) through an exhaust gas recirculation passage (411), bypassing the exhaust manifold (50), whereby an exhaust stroke of a piston within the one cylinder (31) serves to pump exhaust gas through the exhaust control valve (41) in another cylinder (32).

L'invention concerne un système de recirculation des gaz d'échappement destiné à un moteur à combustion interne, comprenant un collecteur de gaz d'échappement (50) et au moins une soupape de limitation de débit des gaz d'échappement (41, 42, 43, 44) située entre le moteur et le collecteur de gaz d'échappement (50). La soupape de limitation de débit des gaz d'échappement (41) détourne une partie des gaz d'échappement de chaque cycle d'un cylindre (31) et la conduit vers un des autres cylindres (32) par un passage de recirculation des gaz d'échappement (411) contournant le collecteur de gaz d'échappement (50). Au cours d'un temps d'échappement d'un piston dans ledit cylindre (31), le gaz d'échappement est pompé à travers la soupape de limitation de débit des gaz d'échappement (41) vers un autre cylindre (32).

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