EGR performance balancing restrictor for an engine system

摘要

An engine system includes an exhaust gas recirculation conduit having an inlet in fluid communication with an exhaust conduit and an outlet in fluid communication with an intake air conduit. An exhaust gas recirculation performance balancing restrictor has an uninstalled position wherein the exhaust conduit defines a first backpressure at the inlet of the exhaust gas recirculation conduit. The exhaust gas recirculation performance balancing restrictor also has an installed position in which the exhaust gas recirculation performance balancing restrictor is removably disposed within the exhaust conduit downstream from the inlet of the exhaust gas recirculation conduit. In the installed position, the exhaust gas recirculation performance balancing restrictor provides a fixed flow restriction through the exhaust conduit to generate a second backpressure at the inlet of the exhaust gas recirculation conduit that is greater than the first backpressure.

主权项

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.