Patent ID: 7621128
Filing Date: 2009-11-24
Classification: F01N,F02B,F02M,Y02T,Y10T

Abstract:
1. A method for directing exhaust gas through an exhaust gas recirculation system, comprising the steps of: providing an engine having an intake, and an exhaust; providing an exhaust gas recirculation passage, an exhaust gas recirculation cooler, and an exhaust gas recirculation bypass passage; providing a single valve operably associated with said exhaust gas recirculation passage, said exhaust gas recirculation cooler, and said exhaust gas recirculation bypass passage; providing said single valve with a housing; providing said single valve with a solid semi-circular disc positioned in said housing; actuating the single valve to direct the flow of exhaust gas from said exhaust gas recirculation passage exclusively through said exhaust gas recirculation bypass passage; actuating said single valve to direct the flow of exhaust gas from said exhaust gas recirculation passage exclusively through said exhaust gas recirculation cooler; actuating said single valve to simultaneously prevent the flow of exhaust gas from said exhaust gas recirculation passage through both of said exhaust gas recirculation bypass passage and said exhaust gas recirculation cooler; actuating said single valve to direct the flow of exhaust gas from said exhaust gas recirculation passage partially through said exhaust gas recirculation bypass passage or partially through said exhaust gas recirculation cooler; and rotating said solid semi-circular disc in said housing to direct exhaust gas to flow through said exhaust gas recirculation cooler, and block the flow of exhaust gas to said exhaust gas recirculation bypass passage.