Method for defining the injection time in an injection system for an internal combustion engine
AssigneeSiemens Aktiengesellschaft
InventorsArno Friedrich, Uwe Lingener
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Abstract
The invention relates to a method for determining the injection time of the injection system of an internal combustion engine, comprising the following steps: detecting a crankshaft signal that indicates the relative position of the crankshaft, determining the injection time on the basis of said crankshaft signal, detecting the phase angle of the crankshaft, synchronizing the calculated injection time on the basis of the phase position of the crankshaft, said phase position of the crankshaft being determined on the basis of the crankshaft signal.
Claims30
A method for defining the injection time in an injection system for an internal combustion engine, said method comprising:
- sensing a crankshaft signal representing the angular position of the crankshaft,
- determining the injection time as a function of the crankshaft signal,
- determining the phase angle of the crankshaft,
- synchronizing the calculated injection time by of the phase angle of the crankshaft, wherein the phase angle of the crankshaft is determined as a function of the crankshaft signal.
A method for defining the injection time in an injection system for an internal combustion engine, sadi method comprising:
- sensing a crankshaft signal representing the angular position of said crankshaft;
- determining the injection time as a function of the crankshaft signal;
- determining the phase angle of the crankshaft as a function of the crankshaft signal;
- sensing a camshaft signal which represents the angular position of said camshaft;
- checking the camshaft signal for correctness,
- synchronizing the calculated injection time, the synchronization being carried out using the camshaft signal when the camshaft signal is correct and by means of the phase angle of the crankshaft, which angle is determined from the crankshaft signal, when the camshaft signal is faulty or has failed, wherein a first rotational speed value is determined from the camshaft signal and a second rotational speed value is determined from the crankshaft signal, the two rotational speed values being compared with one another in order to check the correctness of the camshaft signal.
Dependencies are inferred from the claim text.