Abstract: The present disclosure relates to dual compression engine boosting systems utilizing both a turbocharger and a supercharger and control systems relating to relative activation and deactivation of the boosting devices. Various Exhaust Gas Recirculation (EGR) configurations are also disclosed for the dual compression engine boosting systems.

Abstract: The present disclosure relates to dual compression engine boosting systems utilizing both a turbocharger and a supercharger and control systems relating to relative activation and deactivation of the boosting devices. Various Exhaust Gas Recirculation (EGR) configurations are also disclosed for the dual compression engine boosting systems.

Abstract: An NOx injection system for treating a vehicle exhaust system comprises an injector for injecting a select material into the vehicle exhaust system and including an electrical coil. An impedance element is connected in series with a flyback diode across the coil. An injector firing control circuit is electrically connected to the injector for driving the coil, the switching circuit operating in an on mode to fire the injector and in an off mode to turn off the injector. The impedance element increases reverse voltage to increase injector turn off response.

Abstract: The present disclosure relates to dual compression engine boosting systems utilizing both a turbocharger and a supercharger and control systems relating to relative activation and deactivation of the boosting devices. Various Exhaust Gas Recirculation (EGR) configurations are also disclosed for the dual compression engine boosting systems.

Abstract: An injector mount system (30) is provided for mounting an injector (22) to an exhaust flow conduit (21) in an exhaust treatment system (10). The injector (22) includes a housing (32) having an open end (46) that mounts an orifice/nozzle (38). The injector mount system (30) includes a boss (62) fixed to the exhaust flow conduit (21), and an end cap (44) of the injector (22) that is attached to the housing (32), closing the open end (46) and securing the orifice/nozzle (38) in the open end (46). The boss (62) and end cap (44) include mating flanges (60,64) that define a non-threaded connector for securing the injector (22) to the exhaust flow conduit (21). The mating flange (60) of the end cap (44) being formed as a unitary part of the end cap (44), and the mating flange (64) of the boss being a unitary part of the boss (62).

Abstract: An NOx injection system for treating a vehicle exhaust system comprises an injector for injecting a select material into the vehicle exhaust system and including an electrical coil. An impedance element is connected in series with a flyback diode across the coil. An injector firing control circuit is electrically connected to the injector for driving the coil, the switching circuit operating in an on mode to fire the injector and in an off mode to turn off the injector. The impedance element increases reverse voltage to increase injector turn off response.

Abstract: An injector mount system (30) is provided for mounting an injector (22) to an exhaust flow conduit (21) in an exhaust treatment system (10). The injector (22) includes a housing (32) having an open end (46) that mounts an orifice/nozzle (38). The injector mount system (30) includes a boss (62) fixed to the exhaust flow conduit (21), and an end cap (44) of the injector (22) that is attached to the housing (32), closing the open end (46) and securing the orifice/nozzle (38) in the open end (46). The boss (62) and end cap (44) include mating flanges (60,64) that define a non-threaded connector for securing the injector (22) to the exhaust flow conduit (21). The mating flange (60) of the end cap (44) being formed as a unitary part of the end cap (44), and the mating flange (64) of the boss being a unitary part of the boss (62).