International Truck and Engine Corporation

Thomas M Kramer

Jeffrey A McElroy

A controller for, and method of, load governing a compression ignition engine. Various data is processed to develop fueling data for accomplishing governed fueling of the engine. The processing includes processing accelerator pedal position data corresponding to the position of an accelerator pedal and engine load data corresponding to the load on the engine to develop engine speed setpoint data according to a function generator containing engine speed setpoint data in correlation with accelerator pedal position data and engine load data to accomplish load governing of the engine in consequence of further processing of the developed engine speed setpoint data. The developed engine speed setpoint data and actual engine speed data are processed by a governor PID to develop the fueling data.

Diesel engine load governing using engine speed setpoint

An engine speed governor controls a diesel engine in a motor vehicle. The engine control has a processor for processing data for Engine speed governing, including developing fuel request data comprising data components derived from proportional, integral, and derivative processing of difference between actual engine speed and requested engine speed. A data source, such as a gear selector switch in an automatic transmission vehicle or a clutch switch in a manual transmission vehicle, distinguishes between engagement and disengagerrent of the vehicle driveline with and from the engine. A respective first table, such as a map, is associated with each of the proportional, integral, and derivative processing and provides selectable calibration values used by the processor to develop the fuel request data when the driveline is engaged with the engine. A respective second table, such as a function, associated with each of the proportional, integral, and derivative processing provides selectable calibration values used by the processor to develop the fuel request data when the driveline is disengaged from the engine. The invention serves to counter engine speed under-run, especially after prolonged vehicle coasting, by more aggressive proportional control. The principles of the invention may also be embodied in speed governing of a stationary diesel engine.

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Lombard, IL, United States of America

Thomas M Kramer