Patent ID: 8783028
Filing Date: 2014-07-22
Classification: F01N,F02B,F02M,Y02T

Abstract:
1. A method of adjusting a backpressure at an inlet of an exhaust gas recirculation conduit of an engine system to improve at least one of an emission characteristic and an efficiency characteristic, the engine system including an internal combustion engine having an intake manifold and an exhaust manifold, an intake air conduit extending from an air inlet to the intake manifold, an exhaust conduit extending from the exhaust manifold to an exhaust outlet, the exhaust gas recirculation conduit having the inlet in fluid communication with the exhaust conduit and an outlet in fluid communication with the intake air conduit, and an aftertreatment component disposed along the exhaust conduit downstream from the exhaust manifold, the method comprising: measuring a pressure in the exhaust conduit with a pressure sensor to determine a first backpressure at the inlet of the exhaust gas recirculation conduit prior to installation of an exhaust gas recirculation performance balancing restrictor; selecting and removably disposing the exhaust gas recirculation performance balancing restrictor within the exhaust conduit downstream from the exhaust manifold to provide a fixed flow restriction through the exhaust conduit to generate a second backpressure at the inlet of the exhaust gas recirculation conduit which is greater than the first backpressure.