Auto-ignition timing control and calibration method

Details Auto-ignition timing control and calibration method Auto-ignition timing control and calibration method

2006-07-11

2006-07-11

Vo, Hieu T. (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

Reexamination Certificate

active

07076360

ABSTRACT:
An auto-ignition timing control and calibration method for use in an internal combustion engine having more than one ignition modes including the mode of compression ignition of a premixed fuel/air mixture (CAI/HCCI), wherein when the engine is operating in the CAI/HCCI mode, in order to determine a prescribed setting or combination of settings of engine operating parameters necessary to achieve a target auto-ignition timing according to a predetermined auto-ignition timing map, the associated compression temperature trajectory of the cylinder charge with time, calculated in dependence on the initial and boundary conditions of the said charge subjected to the said prescribed setting or combination of settings of the said engine operating parameters, and further in dependence on the interim heat exchange processes affecting the said charge, is used for testing and verifying that the said trajectory reaches a target temperature at a target reference timing relative to TDC of the engine, and wherein the said target temperature and timing are predetermined by calibration.

REFERENCES:
patent: 5570667 (1996-11-01), Gray et al.
patent: 6427643 (2002-08-01), Dixon
patent: 7013212 (2006-03-01), de Ojeda et al.
patent: 2003/0097998 (2003-05-01), Gray

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