Abstract: Methods are provided for estimating the NOx content of exhaust gas produced by an internal combustion engine. The method includes determining one or more operating parameters. The method further includes applying the determined operating parameter(s) to a global NOx model. The global NOx model may be derived using a plurality of steady state data points relating to local NOx emission models. The steady state data points may be derived using a plurality of set and variable operating parameters. The global NOx model allows for prediction of the engine-out NOx content of exhaust gas in real time and without a NOx sensor, even if engine operating parameters change.

Abstract: A sliding mode controller for one or more valves in an engine induction or exhaust system provides improved thermal control over an engine. Double discrete variable rate filters generate position and velocity profiles for various intake and exhaust valves. Alternatively, double discrete fixed rate filters may be used to generate position and velocity profiles. A control law includes a Signum function and is modified with a “boundary layer” to control valve chattering. Alternatively, gain scheduling may be used to remove valve chattering. A low pass filter on the controller output can be used to remove chattering phenomena.

Abstract: In one embodiment, an assembly for use with a lean NOx catalyst (LNC) is described. An outer tube is coupled to the LNC. An inner tube is disposed completely inside the outer tube. The exhaust flow is split between the inner tube and the outer tube. The inner tube houses a catalytic fuel vaporizer and a catalytic fuel reformer that convert at least a portion of the injected hydrocarbons to hydrogen and carbon monoxide, and vaporized hydrocarbons for NOx reduction.

Abstract: A method of controlling operation of an engine is provided that utilizes a number of preset operating parameters. The method determines an operating mode of the engine. The method determines an operating state of the engine. A plurality of engine parameter settings is retrieved from a memory in response to the determined operating mode and the determined operating state of the engine. The plurality of engine parameter settings are applied to at least one control algorithm of the engine.

Abstract: A method of controlling an engine based upon airflow is provided. A request for a desired torque output of the engine is received. A first amount of fuel required to generate the desired torque is retrieving from a memory. An amount of airflow required to combust the fuel required to generate the desired torque at a predefined air/fuel ratio is calculated. A first amount of EGR required to produce a predefined amount of NOx emissions is calculated. The amount of airflow required to the first amount of EGR required is added. The total of the airflow and the first amount of EGR are compared to a volume available in a cylinder. At least one of the first amount of fuel delivered and the first amount of EGR provided is modified when the total of the airflow and the EGR exceeds the total volume available in the cylinder.

Abstract: A method of controlling a variable geometry turbocharger is provided. A predefined desired boost pressure of a turbocharger is obtained from a memory. A predefined desired mass flow rate in an intake manifold of an engine is obtained from the memory. A theoretical amount of power required by the turbocharger to generate the desired boost pressure and the desired mass flow rate is calculated. An actual mass flow rate in the intake manifold is determined. An actual amount of power required by the turbocharger to generate the desired boost pressure and the actual mass flow rate is calculated. At least one adjustable vane of the turbine of the turbocharger is adjusted to allow the theoretical amount of power required of the turbocharger to generally equal the actual amount of power by adjusting the boost pressure.

Abstract: A method of controlling exhaust gas recirculation in an engine is provided. An amount of oxygen in an exhaust of an engine is measured. A desired intake manifold oxygen concentration is obtained. An exhaust gas recirculation rate to provide the desired intake manifold oxygen concentration is calculated based on the measured amount of oxygen in the exhaust. An exhaust gas recirculation valve is set based on the calculated exhaust gas recirculation rate.

Abstract: A method controlling operation of an engine utilizing a number of preset operating parameters is provided. An operating mode of the engine is determined. An operating state of the engine is determined. A first plurality of engine parameter settings are retrieved from a memory in response to the determined operating mode and the determined operating state of the engine. The first plurality of engine parameter settings are applied to at least one control algorithm of the engine. A rate of soot accumulation from the engine is monitored. The rate of soot accumulation is compared to a predetermined soot accumulation rate threshold. A second plurality of engine parameter settings are retrieved from a memory in response to the monitored rate of soot accumulation exceeding the predetermined soot accumulation rate threshold.

Abstract: Apparatuses described herein relate to a diesel particulate filter for use in a diesel engine exhaust system. The diesel particulate filter comprises a particulate filter having a plurality of filter flow channels configured to remove diesel exhaust particulates from a diesel exhaust stream. The plurality of filter flow channels are disposed for contact with the diesel exhaust stream and are coated with a three-way catalyst coating. The three-way catalyst coating may be configured to assist in soot oxidation during regeneration events as well as for the reduction of NOx from the exhaust stream. The three-way catalyst coating may replace, or be used in addition to, a three-way catalyst of a diesel oxidation catalyst.

Abstract: Apparatus for controlling an internal combustion engine limits emission of undesirable compounds of nitrogen and oxygen and provides increased transient power.

Abstract: A method is provided for operating an engine to limit soot emissions during fuel-enriched operation. The method includes operating the engine using a first fuel injection pattern and timing to inject fuel into a combustion chamber of the engine. The method further includes receiving a request for an increased engine power output and operating the engine using a second fuel injection pattern and timing to inject more fuel into the combustion in response to the request for the increased power output, where the second fuel injection pattern and timing is configured to minimize soot emissions during enriched fuel operations, such as during transient operations.

Abstract: A method for controlling an internal combustion engine limits emission of undesirable compounds of nitrogen and oxygen and provides increased transient power.

Abstract: A two-way needle control valve for controlling the position of the needle of a needle valve in a fuel injector is disclosed. A poppet member configured for displacement between an open position and a closed position in a valve bore of a valve body. The valve bore includes drain for draining fuel from valve when valve is open. The valve includes a supply line that extends across at least a portion of the valve body. The supply line receives fuel from a high pressure fuel line. An inlet throttle line is in fluid communication with the supply line, and delivers fuel from the supply line to a control chamber in a throttle plate. An outlet throttle line delivers fuel from the control chamber to a valve body inlet line, which is configured to deliver fuel to the cavity in the valve bore.