Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Patent
1993-07-07
1999-01-19
Louis-Jacques, Jacques H.
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
With indicator or control of power plant
701110, 701101, 731173, 73116, 123416, 123436, 123419, G06G 776
Patent
active
058625054
ABSTRACT:
A rotational difference between the speed corresponding to a cylinder at a combustion stroke and the speed corresponding to the cylinder at a previous combustion is calculated. Then, a corrected value is derived from averaging all the rotational differences up to the present combustion stroke. A corrected rotational difference is calculated by subtracting the corrected value from the rotational difference. The misfire judgment level is calculated and set with an interpolated calculation by referring to the map that has the parameters of engine speed and fuel injection pulse width. The level is then compared with the corrected rotational difference. If the corrected rotational difference is larger than the misfire judgement level, and if the corrected rotational difference at the previous combustion stroke is smaller than the level that has a minus value, it can be accurately judged that the cylinder at the previous combustion stroke is in a condition of misfire.
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Fuji Jukogyo Kabushiki Kaisha
Louis-Jacques Jacques H.
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