Abstract: An exhaust gas system includes an engine-turbine exhaust gas conduit, a turbocharger, a turbine-housing exhaust gas conduit, an injection housing, a dosing module, and a bypass system. The engine-turbine exhaust gas conduit is configured to receive exhaust gas. The turbocharger includes a turbine. The turbine is coupled to the engine-turbine exhaust gas conduit. The turbine-housing exhaust gas conduit is coupled to the turbine. The injection housing is coupled to the turbine-housing exhaust gas conduit and centered on an injection housing axis. The dosing module is coupled to the injection housing and includes an injector. The injector is configured to dose reductant into the injection housing. The injector is centered on an injector axis. The bypass system includes a bypass inlet conduit, a bypass valve, and a bypass outlet conduit. The bypass inlet conduit is coupled to the engine-turbine exhaust gas conduit.

Abstract: An exhaust gas system includes an engine-turbine exhaust gas conduit, a turbocharger, a turbine-housing exhaust gas conduit, an injection housing, a dosing module, and a bypass system. The engine-turbine exhaust gas conduit is configured to receive exhaust gas. The turbocharger includes a turbine. The turbine is coupled to the engine-turbine exhaust gas conduit. The turbine-housing exhaust gas conduit is coupled to the turbine. The injection housing is coupled to the turbine-housing exhaust gas conduit and centered on an injection housing axis. The dosing module is coupled to the injection housing and includes an injector. The injector is configured to dose reductant into the injection housing. The injector is centered on an injector axis. The bypass system includes a bypass inlet conduit, a bypass valve, and a bypass outlet conduit. The bypass inlet conduit is coupled to the engine-turbine exhaust gas conduit.

Abstract: An exhaust gas system includes an engine-turbine exhaust gas conduit, a turbocharger, a turbine-housing exhaust gas conduit, an injection housing, a dosing module, and a bypass system. The engine-turbine exhaust gas conduit is configured to receive exhaust gas. The turbocharger includes a turbine. The turbine is coupled to the engine-turbine exhaust gas conduit. The turbine-housing exhaust gas conduit is coupled to the turbine. The injection housing is coupled to the turbine-housing exhaust gas conduit and centered on an injection housing axis. The dosing module is coupled to the injection housing and includes an injector. The injector is configured to dose reductant into the injection housing. The injector is centered on an injector axis. The bypass system includes a bypass inlet conduit, a bypass valve, and a bypass outlet conduit. The bypass inlet conduit is coupled to the engine-turbine exhaust gas conduit.

Abstract: A control system for a variable geometry turbocharger having a turbine driven by exhaust gas delivered to an exhaust gas inlet of the turbocharger from an engine exhaust manifold and a compressor driven by the turbine to deliver air to an engine intake manifold via an air outlet of the turbocharger. The differential pressure across the engine is monitored, and a closed loop control system adjusts the variable geometry mechanism to prevent the differential pressure exceeding a predetermined limit. In engine braking mode the variable geometry mechanism may be actuated by a signal representative of the exhaust manifold pressure. An override circuit may be provided to control the variable geometry mechanism in the event of the turbocharger rpm exceeding a predetermined limit.

Abstract: An ignition system with an ignition coil employs a power amplifier driven by a microprocessor for starting and interrupting coil current, in accordance with signals from an engine driven transducer. The power amplifier includes a current limiter, but this does not usually come into operation. Instead, the actual current flowing just before the instant of spark in each engine cycle is measured and the on time of the power amplifier is adjusted for the next cycle to cause the final current to approach a desired value less than the current limit value.