Combined EGR valve and cooler by-pass

An exhaust gas valve assembly for an engine having an exhaust and an intake, comprising:

• an exhaust gas recirculation passage for receiving exhaust gas from said exhaust manifold, an exhaust gas recirculation bypass passage, and an exhaust gas recirculation cooler;
• an exhaust gas valve operably associated with said exhaust gas recirculation bypass passage and said exhaust gas recirculation cooler, wherein said exhaust gas valve includes a semi-circular disc that rotates to control the flow of exhaust gas;
• and
• an actuator for operating said exhaust gas valve;
• wherein said actuator controls said exhaust gas valve to direct exhaust gas exclusively through said exhaust gas recirculation cooler, said actuator controls said exhaust gas valve to direct exhaust gas exclusively through said exhaust gas recirculation bypass passage, said actuator controls said exhaust gas valve to direct exhaust gas simultaneously through both said exhaust gas recirculation cooler and said exhaust gas recirculation bypass passage, and said actuator controls said exhaust gas valve to simultaneously prevent exhaust gas flow through both of said exhaust gas recirculation cooler and said exhaust gas recirculation bypass passage.

An exhaust gas valve assembly for an engine having an intake and an exhaust, comprising:

• an exhaust gas recirculation cooler operable for receiving exhaust gas from the exhaust, and delivering said exhaust gas to the intake;
• an exhaust gas recirculation bypass passage operable for receiving exhaust gas from the exhaust, bypassing said exhaust gas recirculation cooler, and delivering said exhaust gas to the intake;
• a single valve operably associated with said exhaust gas recirculation cooler and said exhaust gas recirculation bypass passage, said single valve being selectively operable for opening and closing flow from said exhaust to said exhaust gas recirculation cooler, said single valve also being operable for opening and closing flow from said exhaust to said exhaust gas recirculation bypass passage, and said single valve being operable for prohibiting flow to both said exhaust gas recirculation cooler and said exhaust gas recirculation bypass passage, said single valve also operable for metering flow therebetween;
• and
• said single valve having a housing, and a solid semi-circular disc located inside said housing, wherein said semi-circular disc is rotated inside said housing controlling the flow of exhaust gas.