Abstract: A cylinder head defines an inlet port having an exit. A valve seat insert defines a seat cut surface that is disposed adjacent to the exit of the inlet port. A cross section of the inlet port parallel to a centerline of the inlet port defines a long turn edge of the inlet port cross section. The long turn edge of the inlet port cross section defines a flow path trajectory of the inlet port. The seat cut surface and the flow path trajectory are substantially aligned to extend the flow path trajectory of the long turn edge of the inlet port cross section across the seat cut surface.

Abstract: An internal combustion engine includes an engine structure defining a plurality of cylinders. One of the plurality of cylinders is a dedicated exhaust gas recirculation cylinder wherein the exhaust passage in communication with the dedicated exhaust gas recirculation cylinder is an exhaust gas recirculation passage that is in communication with an intake manifold that is in communication with the plurality of intake passages. An exhaust gas recirculation cooler is in communication with the exhaust gas recirculation passage. A charge air cooler is in communication with an inlet air/exhaust gas recirculation mixer. A condensate collection vessel is provided for collecting condensate from one or both of the exhaust gas recirculation cooler and the charge air cooler. An injection system injects condensate from the condensate collection vessel into the plurality of cylinders.

Abstract: An engine assembly includes an engine block defining a cylinder, an exhaust system, and an exhaust gas recirculation system. A first exhaust valve is configured to control fluid communication from the cylinder to the exhaust system. A second exhaust valve is configured to control fluid communication from the cylinder to the exhaust gas recirculation system. The second exhaust valve is selectively activatable and deactivatable independently of the first exhaust valve.

Abstract: An internal combustion engine comprises a first engine bank and a second engine bank. A first intake valve is disposed in an intake port of a cylinder of the first engine bank, and is configured for metering the first flow of combustion air by periodically opening and closing according to a first intake valve lift and duration characteristic. A variable valve train control mechanism is configured for affecting the first intake valve lift and duration characteristic. Either a lift or duration of the first intake valve is modulated so as to satisfy an EGR control criterion.

Abstract: An internal combustion engine comprises a first engine bank and a second engine bank. A first intake valve is disposed in an intake port of a cylinder of the first engine bank, and is configured for metering the first flow of combustion air by periodically opening and closing according to a first intake valve lift and duration characteristic. A variable valve train control mechanism is configured for affecting the first intake valve lift and duration characteristic. Either a lift or duration of the first intake valve is modulated so as to satisfy an EGR control criterion.

Abstract: An engine assembly includes an engine block defining a cylinder, an exhaust system, and an exhaust gas recirculation system. A first exhaust valve is configured to control the flow of fluid from the cylinder to the exhaust system. A second exhaust valve configured to control the flow of fluid from the cylinder to the exhaust gas recirculation system. The second valve is deactivatable independently of the first valve, thereby enabling EGR flow.

Abstract: A multi-cylinder spark-ignition internal combustion engine (engine) that includes a dedicated-cylinder exhaust gas recirculation (EGR) system is described. The dedicated-cylinder EGR system includes a controllable exhaust gas diverter valve that selectively diverts all exhaust gas produced by one of the cylinders to an air intake system of the engine. A method for controlling the engine includes monitoring a parameter associated with operation of the dedicated-cylinder EGR system. Upon detecting a change in the parameter that indicates a change in operation of the dedicated-cylinder EGR system, a controller controls operation of the internal combustion engine to reduce an effective cylinder compression ratio.

Abstract: An engine assembly includes an intake assembly, a spark-ignited internal combustion engine, and an exhaust assembly. The intake assembly includes a charge air cooler disposed between an exhaust gas recirculation (EGR) mixer and a backpressure valve. The charge air cooler has both an inlet and an outlet, and the back pressure valve is configured to maintain a minimum pressure difference between the inlet of the charge air cooler and an outlet of the backpressure valve. A dedicated exhaust gas recirculation system is provided in fluid communication with at least one cylinder and with the EGR mixer. The dedicated exhaust gas recirculation system is configured to route all of the exhaust gas from the at least one cylinder to the EGR mixer for recirculation back to the engine.

Abstract: A method of operating a gasoline engine having a first subset of cylinders and a second subset of cylinders includes providing a flow of compressed air from a single-sequential compressor to the engine, selectively deactivating the first subset of cylinders, and igniting gasoline mixed with the compressed air in the second subset of cylinders. The single-sequential compressor includes a dual sided impeller having a first blade arrangement in fluid communication with a first air inlet, and an opposing second blade arrangement in fluid communication with a second air inlet. Additionally, deactivating the first subset of cylinders includes sealing the first subset of cylinders such that the flow of compressed air is provided only to the second subset of cylinders.

Abstract: An intake manifold having an EGR-air flow distributor for distributing the desired air flow and EGR-air mixture through the intake manifold to each cylinder is disclosed. The EGR-air flow distributor includes a set of guide vanes defining plural flow channels in a plenum region of the inlet manifold. The EGR-air flow distributor also includes an EGR tube partially extending into the inlet manifold and having a slot formed therein for introducing EGR into the plenum region at a single location between the engine throttle and the guide vanes.

Abstract: A crankshaft for a V8 engine includes first, second, third, fourth, fifth, sixth, seventh and eighth crank pins defined on the crankshaft. The second crank pin is rotationally offset from the first crank pin, the third crank pin is rotationally offset from the first and second crank pins, the fourth crank pin is rotationally offset from the first, second and third crank pins, the fifth crank pin is rotationally offset from the first, second, third and fourth crank pins, and the sixth pin is rotationally offset from the first, second, third, fourth and fifth crank pins. The seventh crank pin is rotationally aligned with the first crank pin and the eighth crank pin is rotationally aligned with the second crank pin.

Abstract: An engine assembly includes an engine block defining a cylinder, an exhaust system, and an exhaust gas recirculation system. A first cam-actuated exhaust valve is configured to control the flow of fluid from the cylinder to the exhaust system. A second cam-actuated exhaust valve configured to control the flow of fluid from the cylinder to the exhaust gas recirculation system. The timing of the second valve is adjustable independently of the timing of the first valve, thereby enabling control of EGR flow through manipulation of exhaust valve timing.

Abstract: A method of reducing warm-up time of an aftertreatment device and a vehicle system for the same are disclosed. Fuel is injected into a plurality of cylinders of an internal combustion engine which is controlled, via a controller. The fuel in a first subset of the plurality of cylinders is combusted to produce a first exhaust product having excess fuel. The fuel in a second subset of the plurality of cylinders is combusted to produce a second exhaust product having excess air. The first exhaust product is expelled through a turbocharger and a valve is actuated to route the second exhaust product away from a dedicated EGR system and downstream from the turbocharger. The excess fuel of the first exhaust product and the excess air of the second exhaust product are mixed downstream from the turbocharger to create an exothermic reaction that produces heat to warm up the aftertreatment device.

Abstract: An engine assembly includes an intake assembly, an internal combustion engine defining a plurality of cylinders and configured to combust a fuel and produce exhaust gas, and an exhaust assembly in fluid communication with a first subset of the plurality of cylinders. Each of the plurality of cylinders are provided in fluid communication with the intake assembly. The exhaust assembly is provided in fluid communication with a first subset of the plurality of cylinders, and a dedicated exhaust gas recirculation system in fluid communication with both a second subset of the plurality of cylinders and with the intake assembly. The dedicated exhaust gas recirculation system is configured to route all of the exhaust gas from the second subset of the plurality of cylinders to the intake assembly. Finally, the engine assembly includes a turbocharger having a variable geometry turbine in fluid communication with the exhaust assembly.

Abstract: An intake manifold having an EGR-air flow distributor for distributing the desired air flow and EGR-air mixture through the intake manifold to each cylinder is disclosed. The EGR-air flow distributor includes a set of guide vanes defining plural flow channels in a plenum region of the inlet manifold. The EGR-air flow distributor also includes an EGR tube partially extending into the inlet manifold and having a slot formed therein for introducing EGR into the plenum region at a single location between the engine throttle and the guide vanes.

Abstract: An internal combustion engine comprises a first engine bank and a second engine bank. A first intake valve is disposed in an intake port of a cylinder of the first engine bank, and is configured for metering the first flow of combustion air by periodically opening and closing according to a first intake valve lift and duration characteristic. A variable valve train control mechanism is configured for affecting the first intake valve lift and duration characteristic. Either a lift or duration of the first intake valve is modulated so as to satisfy an EGR control criterion.

Abstract: An engine assembly includes an intake assembly, a spark-ignited internal combustion engine, and an exhaust assembly, and a turbocharger. The internal combustion engine is coupled with the intake assembly and defines a plurality of cylinders that are configured to combust a fuel. A subset of the cylinders are configured to selectively deactivate to stop combusting fuel while others continue combustion. The turbocharger includes a dual-inlet compressor in fluid communication with the intake assembly and a dual-scroll turbine in fluid communication with the exhaust assembly. The dual-inlet compressor and dual-scroll turbine are operatively connected through a shaft.

Abstract: An engine assembly includes an intake assembly, a spark-ignited internal combustion engine, and an exhaust assembly. The intake assembly includes a charge air cooler disposed between an exhaust gas recirculation (EGR) mixer and a backpressure valve. The charge air cooler has both an inlet and an outlet, and the back pressure valve is configured to maintain a minimum pressure difference between the inlet of the charge air cooler and an outlet of the backpressure valve. A dedicated exhaust gas recirculation system is provided in fluid communication with at least one cylinder and with the EGR mixer. The dedicated exhaust gas recirculation system is configured to route all of the exhaust gas from the at least one cylinder to the EGR mixer for recirculation back to the engine.

Abstract: An exhaust gas recirculation system includes an engine defining first and second combustion chambers, wherein a fuel is combustible to produce a combustion gas. The system includes an intake manifold disposed in fluid communication with the first and second chambers, an exhaust manifold disposed in fluid communication with the second chamber, and an exhaust gas recirculation conduit disposed in fluid communication with the first chamber and configured for directing the gas from only the first chamber to the intake manifold. The system includes a bypass valve transitionable between a first position wherein the conduit is disposed in fluid communication with the exhaust manifold such that the gas flows from the first chamber to the exhaust manifold, and a second position wherein the conduit is not disposed in fluid communication with the exhaust manifold such that the gas does not flow from the first chamber to the exhaust manifold.

Abstract: An engine assembly includes an intake assembly, an internal combustion engine defining a plurality of cylinders and configured to combust a fuel and produce exhaust gas, and an exhaust assembly in fluid communication with a first subset of the plurality of cylinders. Each of the plurality of cylinders are provided in fluid communication with the intake assembly. The exhaust assembly is provided in fluid communication with a first subset of the plurality of cylinders, and a dedicated exhaust gas recirculation system in fluid communication with both a second subset of the plurality of cylinders and with the intake assembly. The dedicated exhaust gas recirculation system is configured to route all of the exhaust gas from the second subset of the plurality of cylinders to the intake assembly. Finally, the engine assembly includes a turbocharger having a variable geometry turbine in fluid communication with the exhaust assembly.