International Engine Intellectual Property Company, LLC

Michael A Majewski

James T Beaucaire

Paul A Wieshuber

Steven Joseph Dickerson

Paul Laurence Berke

David V Rodgers

John J Bryjak

Michael James McNulty

Steve J Dickerson

Rimas L Petrosius

Douglas W Villacreses

A method of operating an engine is provided. Output of an engine speed sensor, a mass air flow sensor, an exhaust gas temperature sensor, and an engine torque estimator are monitored with an electronic control module. It is determined if the engine is operating in one of either a transient condition and a non-transient condition based upon output of at least one of the sensors and the torque estimator. Fuel injection timing is set based upon if the engine is operating in a transient condition. An exhaust gas recirculation valve position is set upon if the engine is operating in a transient condition. An intake throttle position is set based upon if the engine is operating in a transient condition. The fuel injection timing, exhaust gas recirculation valve position, and the intake throttle position are set to minimize NOx emissions when the engine is operating in a transient condition.

Engine controlling emissions during transient operations

A regeneration disable control system () of a vehicle having a power take off device () that is run off a motor () which is powered by at least one battery (), and an engine () for recharging the at least one battery and for regenerating a diesel particulate filter (), includes a hybrid controller (). The hybrid controller () sends a signal to an engine controller () to indicate whether hybrid-PTO mode is enabled. If the hybrid-PTO mode is enabled, the engine controller () determines whether regeneration of the diesel particulate filter () is required. If regeneration is required, the engine controller () sends a signal to a regeneration inhibitor () to disable the engine () from initiating a regeneration event.

System for disabling diesel particulate filter regeneration during electric operation

The method for regeneration of a diesel particulate filter of a vehicle equipped with a hybrid engine, wherein the temperature of the exhaust exiting the diesel engine is increased above a predetermined level by increasing load thereon, through optimization of interaction between the diesel particulate filter aftertreatment system and the hybrid engine control through messaging via a communication bus is disclosed. The load on the engine may be increased with or without the assistance of the electric motor/generator of the hybrid engine, and will not affect required acceleration/deceleration of the vehicle.

Method for diesel particulate filter regeneration in a vehicle equipped with a hybrid engine background of the invention

A PI control strategy controls engine speed to an engine speed set-point. A proportional map () is populated with data values to be used in calculating the P component of the strategy. An integral map () is populated with data values to be used in calculating the I component. Each data value in the maps is correlated with a speed data value representing engine speed (N) and a speed error data value representing the difference between engine speed and engine speed set-point (N_DIF_MAX_LIM). Values for proportional and integral components are selected from the respective maps by processing current engine speed data and current engine speed error data. The strategy uses the values from the maps for controlling engine speed to the speed set-point. Data values from other maps (and; orand) modify the selected values from the proportional and integral maps () for transmission type, transmission gear, and engine temperature.

Engine speed controller having PI gains set by engine speed and engine speed error

A diesel engine () has a control system () that processes certain data to develop data values for one or more temperature-dependent variables, such as injection control pressure (ICP), that affect engine starting and ensuing warm-up. The control system also processes data for detecting a temperature differential in the engine indicative of a block heater () having been used to heat the engine prior to cranking. Upon detection of such temperature differential, the control system selects a temperature data source from multiple available temperature data sources, namely engine coolant temperature ECT, engine oil temperature EOT, and charge air temperature AIT, and processes temperature data from the selected source with additional data to develop data values for one or more of the temperature-dependent variables.

Strategy for detecting use of a block heater and for modifying temperature-dependent variables to account for its use

A fluid pressure near a filter () is measured and compared () to a predetermined value that is based on one or more engine operating parameters. When the measured fluid pressure deviates enough from the predetermined value by an established amount, an indication of the deviation may be provided to notify of a potential problem with the filter (), such as obstruction, restriction, or some form of clogging.

Method and apparatus for indicating a potential fluid filter problem

An internal combustion engine that propels a vehicle has a fuel injection system for injecting fuel into engine cylinders at desired injection control pressure. A control system controls activation and de-activation of a hydraulic actuator for an engine brake. A processor processes data to develop data for desired injection control pressure. Transitional injection control pressure data is used as desired injection control pressure during a transition time interval that commences with de-activation of the engine brake caused by the relief of pressure of the control fluid for allowing resumption of positive power flow from the engine for propelling the vehicle and that ends after the processor has determined the existence of a predetermined correlation between the transitional injection control pressure data and data indicating pressure of the control fluid.

Strategy for engine fueling during return to positive power flow after engine brake de-activation

An engine () having a control system () that executes a control strategy () for limiting engine fueling upon deactivation of an engine retarder. Upon deactivation of the retarder, the strategy immediately shuts off fueling by setting the maximum fueling limit MFLMX to zero via setting of a latch function (). Fueling continues to be shut off so long as the difference between a desired pressure for the hydraulic fluid used to force fuel into the engine combustion chambers and actual pressure of the hydraulic fluid (ICPERR) equals or exceeds a value (ICPVREERR) from a map () correlated both with the speed (N) at which the engine is running and with governed engine fueling (MFGOV) appropriate for the load on the engine at the engine running speed. Once that difference ceases to equal or exceed a value from the map (), the latch function is reset, and the limit value for fueling provided by the strategy increases withtime according to a map ().

Post-retard fuel limiting strategy for an engine

An engine ( ) having a control system ( ) that executes a control strategy ( ) for limiting engine fueling upon deactivation of an engine retarder. Upon deactivation of the retarder, the strategy immediately shuts off fueling by setting the maximum fueling limit MFLMX to zero via setting of a latch function ( ). Fueling continues to be shut off so long as the difference between a desired pressure for the hydraulic fluid used to force fuel into the engine combustion chambers and actual pressure of the hydraulic fluid (ICP_ERR) equals or exceeds a value (ICP_VRE_ERR) from a map ( ) correlated both with the speed (N) at which the engine is running and with governed engine fueling (MFGOV) appropriate for the load on the engine at the engine running speed. Once that difference ceases to equal or exceed a value from the map ( ), the latch function is reset, and the limit value for fueling provided by the strategy increases withtime according to a map ( ).

A control strategy for mitigation of the effect of increased engine back-pressure on fuel injectors ( ) when an engine retarder is activated to slow the engine ( ) of a motor vehicle. The strategy attenuates injection control pressure ICP of hydraulic fluid for the fuel injectors to a defined dwell pressure ICP_VRE_DWL, and once that dwell pressure has been attained, keeps the injection control pressure from exceeding it for the length of a dwell time ICP_DWL_TM. Upon elapse of the dwell time, the injection control pressure gradually increases above the dwell pressure using a pressure versus time map ( ). When engine operating conditions call for greater injection control pressure while the retarder is activated, the strategy provides for greater injection control pressure using a pressure versus speed map ( ).

Injection control pressure strategy during activation of an engine retarder

This invention provides a pump with a close-mounted valve for a hydraulic fuel system in an internal combustion engine. The hydraulic fuel system may have a high pressure pump connected to a low pressure side and high pressure reservoirs. The pump has a drive shaft, a shaft cylinder, one or more cylinders, and a close-mounted valve. The close-mounted valve has a valve body, a valve spool, a valve spring, and a valve coil. The valve body is positioned inside a shaft cavity formed by the shaft cylinder. The close-mounted valve may control the volume and pressure to reduce or eliminate the dumping of high-pressure hydraulic fluid in the hydraulic fuel system.

High pressure pump with a close-mounted valve for a hydraulic fuel system

A control strategy for a throttled inlet oil pump that supplies high-pressure oil to a rail that serves fuel injectors of a diesel engine. A processor processes certain data to develop data for selectively restricting the throttle at the pump inlet. The processor develops error data defining error between a desired injector control pressure in the rail and actual injector control pressure in the rail. For a prevailing value of the error data, the processor adds a correlated offset data value to introduce an offset into the prevailing error data value, thereby creating an offset error data value. The processor further processes the offset error data value to create a value for the data that establishes the throttle restriction.

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Joliet, IL, United States of America

Michael A Majewski