Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Reexamination Certificate
2007-05-11
2008-10-14
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
C123S447000
Reexamination Certificate
active
07437234
ABSTRACT:
A method for adjusting an on-time calculation model or a lookup table used for determining on-time values for an injector of a cylinder in a combustion engine useful in a motor vehicle, where the injector is connected to a fuel accumulator. The method comprises the steps of injecting a test fuel quantity exceeding the maximum allowed fuel injection quantity under such conditions that no ignition of the injected fuel takes place; measuring the pressure drop in the fuel accumulator during the test injection; establishing the actual fuel quantity injected during the test injection based on the pressure drop; performing a comparison based on the actual fuel quantity or the corresponding on-time value established with the aid of the on-time calculation model or the lookup table; and adjusting the on-time calculation model or lookup table in dependence on the result of the comparison. An apparatus which performs the method. A computer program to perform the method.
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Ostrolenk Faber Gerb & Soffen, LLP
Scania CV AB ((publ)
Vo Hieu T
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