Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Patent
1999-04-09
2000-08-29
Yuen, Henry C.
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
With indicator or control of power plant
701115, 701 35, 731183, G06G 776, G06F 1700
Patent
active
061121509
ABSTRACT:
A fault recognition system is implemented as an adjunct to fault determination software of an on-board engine control module (ECM). The ECM activates a "Type A" or "Type B" fault code for each signal received from a plurality of sensors disposed about the engine when that signal exceeds a predetermined threshold. A "Type C" fault is recognized and activated when all of a predetermined group of underlying "Type A" or "Type B" fault codes have been activated. The "Type C" fault is displayed, while the underlying faults may or may not be displayed. The "Type C" fault provides a better and more immediate indication of the source of the engine problem than any of the underlying faults. Only those underlying faults that aid in the recognition of the source of the engine problem are displayed. The remaining faults underlying the "Type C" fault are masked. When the "Type C" fault becomes inactive, any underlying fault codes are unmasked for subsequent evaluation. To avoid false positives or negatives, all of the underlying faults must be activated for a predetermined period before the "Type C" fault will be activated. Likewise, before the "Type C" fault is de-activated, at least one of the underlying faults must be inactive for a predetermined period.
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Decker Scott G.
Greathouse Gregg G.
Irons John M.
Lewandowski Edward J.
Tusneem Irfan
Vo Hieu T.
Yuen Henry C.
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