Abstract: A method of logging faults in an electronic controlled internal combustion engine that passes any fault readings through a debounce logic to determine whether the fault indication is real.

Abstract: A method for diagnosing an air intake throttle with a spring activated throttle actuator, on an electronic controlled internal combustion engine system including an electronic control unit (ECU) with memory, a battery electrically connected to said engine and an ignition switch for connecting said battery to said engine and supplying current, comprising engaging the ignition switch to close a circuit between said battery and said engine; applying a first predetermined voltage to an air intake throttle plate actuator and determining a first period of throttle response time elapsed from a full open throttle position to a full close throttle position for a first throttle velocity; discontinuing application of said first predetermined voltage to said air intake throttle actuator and determining a second period of throttle response time elapsed from a full close throttle position to a full open throttle position for a second throttle velocity; applying a second voltage to said air intake throttle plate actuator an

Abstract: A real-time, on board, diesel engine emissions estimation with an empirical, table-based approach that accounts for up to eight (8) input parameters, for optimum emissions estimation under steady state or transient engine operation. The method considers a steady state NOx model, steady state Particulate Matter model, transient NOx model and transient Particulate Matter models to populate a table in memory. The switch between steady state and transient models, real time emissions estimations is based on the rate of change of engine speed (RPM). If the rate of change of RPM exceeds a predetermined threshold, transient models for NOx and Particulate Matter are used to operate the engine and reduce emissions of NOx and Particulate Matter.

Abstract: A method for determining the efficiency of a diesel oxidation catalyst (DOC) having an inlet and an outlet for the flow of an exhaust gas stream in an exhaust system used in conjunction with an electronic controlled internal combustion engine equipped with an Electronic Control Unit (ECU) having memory, comprising: determining temperature of the exhaust gas stream at the DOC inlet; determining temperature of the exhaust gas stream at the DOC outlet; determining the energy released from the DOC; and comparing an actual change in temperature of the DOC out to a virtual temperature of the DOC out to determine whether the combustion efficiency of the DOC is below a predetermined value.

Abstract: A fault code memory manager architecture for heavy duty diesel engines consisting of a dedicated monitoring unit module and at least one fault code memory manager administrator module.

Abstract: A method to operate an electronic controlled diesel engine to provide enhanced fault code administration responsive to the variable driving cycle.

Abstract: A method for verifying the functionality of the components for a diesel particulate filter system based upon engine speed, engine torque, inlet and outlet exhaust pressure at the diesel particulate filter. Various sensor signals are compared to calibratable values in memory for a determination whether the diesel particulate filter system is functional.

Abstract: A method to operate an electronic controlled internal combustion engine with an electronic controller having memory and tables resident therein to obtain and use sensor data beyond the Nyquist threshold.

Abstract: The present invention relates to a method to protect a starter from over heating during any cranking operation to start an electronically controlled internal combustion engine having an electronic control unit with a memory. The method includes constraining the time during which a cranking operation may proceed and ensuring that the starter temperature is within a predetermined range to ensure that the starter does not operate for a time period that permits the starter to heat up beyond a predetermined temperature range.

Abstract: A method and system for passively regenerating particulate filters, catalyze soot filters and NOx adsorber catalysts for a vehicle having a compression ignition engine having an engine control module (ECM) including an integrated engine and emission system map, and an integrated starter/alternator/flywheel/retarder assembly, comprising sensing the condition of the particulate filters, catalyzed soot filters, and NOx adsorber catalysts and generating an initiate cleaning cycle signal upon sensing that the filters and catalysts require cleaning, monitoring operation of the engine and vehicle to determine the engine speed and vehicle speed and generating an engine speed/vehicle speed operating signal, receiving the initiate passive cleaning engine cycle signal and the engine speed vehicle speed operating signal, and initiating engine control parameter adjustments to modify engine operation to promote passive regeneration of the filters.

Abstract: In one aspect, the present invention is directed to a method for operating an electronically controlled internal combustion engine in a vehicle to perform at least one rationality check on at least one sensor to detect impending sensor failure and verify component functionality. The engine is equipped with an engine control system (ECS) having a memory and in electronic communication with various sensors. The sensors transmit data signals to the ECS indicative of associated engine and vehicle component functionality.

Abstract: A fuel injector 10 for a Diesel engine has a plunger 12 and two control valves 20 and 30 for controlling the injection of fuel from the main supply cavity to the discharge port 52. Each control valve 20 and 30 are actuated through piezo-electric stacks 34 and 74 connected to a electronic variable voltage supply 33.

Abstract: One embodiment of the invention includes a method of operating an internal combustion engine system comprising an engine, an oxidation catalyst, and a particulate filter, the method comprising: determining if the outlet temperature of exhaust gas from the oxidation catalyst is below a first temperature, measuring the time that the outlet temperature of exhaust gas from the oxidation catalyst is below the first temperature, determining if the measured time has exceeded a first time period, and if so, elevating the temperature of the exhaust gas exiting the oxidation catalyst.

Abstract: A method to estimate real-time exhaust pressure in a compression ignition engine with variable geometry turbocharger and an EGR by adding the turbocharger RPM, the engine RPM, EGR value position and intake manifold pressure to determine a final turbocharger turbine inlet pressure to control NOx emissions.

Abstract: An inertial impactor that uses gas stream flow rate to separate oil particles in internal combustion engine crankcase emissions. The inertial impactor is particularly adapted for use in closed crankcase ventilation systems. The oil particles have a particle size of from about 0.3 ?m to about 0.7 ?m. Elimination of the oil particles in the crankcase emission gas stream results in cleaner intake air to the turbocharger air intake system.

Abstract: In one embodiment, the present invention relates to a method to operate an internal combustion engine equipped with an Electronic Control Unit (ECU) with memory, an exhaust system including a Diesel Oxidation Catalyst (DOC), a Diesel Particulate Filter (DPF), upstream of a Selective Catalyst Reducer (SCR). A doser is in the DPF and actuated by commands from the ECU. The method includes sensors at the DPF and SCR electronically connected to the ECU to transmit data signals indicative of operating conditions at the DPF and SCR. The method includes sensing the temperature at an outlet of the DPF and an inlet at the SCR determining whether that temperature is at least a predetermined temperature for a predetermined period of time, and introducing heat to the SCR to raise its temperature to a predetermined level for a predetermined period of time, such as light off temperature, to operate more efficiently. Heat may be introduced in the exhaust stream by engine thermal management strategies as well.

Abstract: The present invention is directed to a method to operate an electronically controlled internal combustion engine with an exhaust system equipped with a diesel particulate filter upstream of a selective catalyst reducer to protect the selective catalyst reducer from premature aging and failure caused by exhaust temperature heat generated during uncontrolled regeneration of the diesel particulate filter.

Abstract: A low geometric squish ratio piston for internal combustion engines to facilitate squish inducing mixing and intensified turbulence near engine top dead center The piston comprises a piston head having a height and a width and a depth with a top surface, and a skirt region with a ring region to define a body. The top surface defines an outer radius and is equipped with a combustion bowl recessed in the top surface and concentric therein to define an inner radius. The outer radius and the inner radius define a low geometric squish ratio. The combustion bowl has a deep piston center depth and a relatively high re-entrant angle at a periphery of the combustion bowl radius.

Abstract: A method and system is provided for determining non-sensed vehicle operating parameters of a vehicle system. The method and system further provide for determining an engine air mass flow rate using the non-sensed vehicle operating parameters. A plurality of vehicle operating set-points may be determined using the non-sensed vehicle system operating parameters and the non-sensed engine air mass flow rate. A controller may use the vehicle operating set-points in order to control emissions of the vehicle system.

Abstract: A method to detect drive cycles of a vehicle and modify engine operation according to the detected drive cycles to effect regeneration of exhaust components, particularly the Diesel Particulate Filter.