Abstract: A method to operate a vehicle equipped with an electronic controlled internal combustion engine. The engine fan is used as a dynamic fan brake when the vehicle exceeds a minimum predetermined operating parameter for a predetermined period of time, and is disabled once the vehicle is operating within predetermined operating parameters.

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 diagnostic system for a vehicle that provides vehicle operational data during a fault code occurrence is disclosed. The diagnostic system includes an onboard diagnostics system and an engine control module. The onboard diagnostics system is configured for generating vehicle diagnostics codes when the vehicle operates outside predetermined operating parameters. The engine control module is operatively configured to monitor vehicle operational data for a plurality of vehicle subsystems. The onboard diagnostic system is configured to wirelessly transmit a vehicle diagnostic code when the vehicle operates outside of the predetermined operating parameters to a remote data storage location. The vehicle operational data is configured to be wirelessly transmitted from the engine control module to the remote data storage location.

Abstract: There is disclosed a method for diagnosing slow EGR response in an internal combustion engine equipped with an electronic controller with memory. In one embodiment, the method includes passing an EGR setpoint value and an actual EGR value through first order filters to eliminate high frequency noise; determining an actual EGR gradient as a function of any difference between the EGR set point and the actual EGR value while simultaneously determining an actual EGR gradient; and logging a fault in the electronic controller if the expected EGR gradient is greater than the actual EGR gradient by a predetermined amount.

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 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 for cold start white smoke protection of a hydrocarbon after treatment device, and method of engine operation to effect the same. The method comprises a) determining the temperature of the hydrocarbon after-treatment device during cold start conditions; b) determining hydrocarbon emissions in the hydrocarbon after-treatment device; and c) modifying engine operating conditions to raise the hydrocarbon after-treatment temperature at a pre-determined rate to a temperature sufficient to permit controlled oxidation of the hydrocarbons in the hydrocarbon after treatment device.

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.

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 to synchronize Fault Code Memory between at least a first module and a second module in an engine controller unit; each said module in electronic communication with each other and having volatile and non volatile memory; said modules in electronic communication; when compatibility of versions of static fault codes between the modules is established, the first module downloads and saves the static fault code table resident on the second module in nonvolatile memory for access by a diagnostic tool.

Abstract: A method to operate an electronically controlled internal combustion engine having an electronic central unit with memory a turbocharger and exhaust gas recirculation valve to determine performance characteristics of said variable geometric turbocharger.

Abstract: A method to determine hydrocarbon slip in a compression ignition engine equipped with an electronic control unit having memory and coupled to an exhaust gas aftertreatment system having a diesel oxidation catalyst, a diesel particulate filter, a selective catalyst reducer and a clean up diesel oxidation catalyst.

Abstract: A method to estimate ambient air temperature in the vicinity of a vehicle equipped with an internal combustion engine equipped with at least an electronic control unit (ECU) with memory and a temperature sensor.

Abstract: A method for diagnosing slow EGR response in an internal combustion engine equipped with an electronic controller with memory, comprising: determining an actual EGR gradient; determining an expected EGR gradient comparing the expected EGR gradient to the actual EGR gradient determining the expected EGR gradient is greater that the actual EGR gradient and logging a fault in the electronic controller if the expected EGR gradient is greater than the actual EGR gradient, and optionally activating a warning to alert the operator of the logging event.

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

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 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: The disclosure is directed to a method to determine oil consumption in an internal combustion engine that does not require extended operation of the engine in the files and is adaptable to be useful at production facilities for testing of sample engines from the line without installation of the engine into a vehicle and operating the vehicle in order to determine oil consumption of the engine during operating conditions.

Abstract: A diagnostic system with a single diagnostic protocol server and multiple data source modules for an electronically controlled internal combustion engine.

Abstract: The present invention is directed to a method to operate an internal combustion engine with electronic control wherein fault codes indicative of emissions levels may be stored in permanent memory.