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 method to operate a vehicle with an electronically controlled internal combustion engine equipped with an electronic control unit with memory and capable of operating the engine in a cruise control mode.

Abstract: A method to operate an electronically controlled internal combustion engine that recognizes when thermal management mode of operation is being applied to an engine but is not attaining desired exhaust temperature for aftertreatment. When the Engine Control System (ECS) recognizes that the engine in operating in thermal management mode in a futile effort, the ECS aborts thermal management mode and returns to normal operating mode.

Abstract: A method of controlling dosing of a hydrocarbon fuel into the exhaust gas of a combustion engine upstream of a particulate filter when the exhaust gas temperature into an oxidation catalyst upstream of a particulate filter has dropped below the light-off temperature of the catalyst.

Abstract: A method for operating an internal combustion engine for variable engine out NOx control talking into account the age of the SCR.

Abstract: A method to operate and electronic controlled internal combustion engine, and particularly a heavy duty diesel engine, to effect vane cleaning of a variable geometry turbocharger.

Abstract: A method of operating an internal combustion engine with a variable geometry turbocharger whereby the turbocharger is cleaned of accumulated soot on a time based periodic basis.

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: A method to refurbish a valve seat in a fuel injector module housing where the valve seat is of a larger diameter than an associate valve guide bore user using an indexable insert insertable into the bore and oriented in a manner to engage the valve seat to facilitate refurbishing.

Abstract: A method for determining a coefficient gain to a signal command to actuate an air intake throttle plate to ensure that the throttle plate responds in a desired manner within a desired responsiveness with relative conformity over the life of the air intake manifold with out losses due to variability in spring/motor/friction responsiveness in the throttle plate actuator. The coefficient gain is multiplied to successive throttle plate command signals to ensure the throttle plate responds as desired. The coefficient gain is re-determined periodically when it is determined that the throttle plate responsiveness does not meet desired throttle plate responsiveness.

Abstract: A method of refurbishing a fuel injector body valve seat. The method includes removing a poppet valve from the valve bore guide, machining the bore and valve seat to remove cavitation, machining to create an undercut a the stress riser, nitriding the valve bore guide and radiusing fuel passage to a sufficient depth to restore hardness thereto.

Abstract: The present invention relates to a method of engine operation to provide a real time engine diagnostic to detect EGR, turbocharger or compressor malfunctions and to prevent such malfunctions from damaging the engine.

Abstract: A method of internal combustion engine operation that include real time engine diagnostics to detect hardware malfunctions that combines the signals for two or more sensors to detect the severity of a hardware malfunction.

Abstract: The present invention relates to a method of engine operation to provide a real time engine diagnostic to detect EGR, turbocharger or compressor malfunctions and to prevent such malfunctions from damaging the engine.

Abstract: A method and system for controlling an engine controller in response to actual vehicle load.

Abstract: A method to operate an internal combustion engine by derating the engine in response to sensed emissions levels as compared to engine speed and engine torque and logging a fault.

Abstract: A method for operating an electronic controlled internal combustion engine with an electronic control unit (ECU) having at least nonvolatile memory and tables resident therein to automatically recalibrate an exhaust gas recirculation (EGR) differential pressure sensor.

Abstract: A method for diagnosing a turbocharger (10) includes disconnecting the compressor outlet conduit (26) so that the engine (12) is naturally aspirated and using the engine to drive the turbine (14) of the turbocharger. The compressor outlet conduit (26) has a restriction (28) to create a backpressure which is measured along with the inlet pressure, barometric pressure and ambient temperature. The flow rate is determined and compared to acceptable parameters from a map data provided by a turbocharger manufacturer to diagnose if the turbocharger is operating within the acceptable parameters.

Abstract: A method for determining a time duration and an amount of fuel to include within exhaust gases to facilitate sintering of ash within a diesel particulate filter to reopen ash filled channels in said diesel particulate filter.

Abstract: Method, system, and controller for controlling exhaust gas temperatures by adjusting exhaust valve timing and/or fueling for one or more cylinders wherein normal operating cylinders receive additional fuel to compensate for the adjusted cylinders, thereby increasing exhaust gas temperatures. The method, system, and controller may be applicable in systems having an engine which emits exhaust gases having particulates which are captured by the particulate filter.