Method for determining whether a crankshaft of an internal combustion engine rotating forward after a reverse rotation is oscillating or continues the forward movement
AssigneesContinental Automotive GmbH, Continental Automotive France
InventorsDhristian Borgmann, Franz Dietl, Valérie Gouzenne, Andreas Läufer
Life of this patent
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Abstract
In a method for determining, whether a crankshaft of a combustion engine rotating forward after a reverse rotation is oscillating or continues the forward movement, when noticing a reverse rotation of the crankshaft, the covered rotational angle during a reverse rotation is detected, an actual threshold is computed by adding the covered rotational angle and a predetermined safety distance. The rotational angle of the crankshaft rotating immediately forward after a reverse rotation is compared to the actual threshold.
Claims11
A method for determining whether a crankshaft of an internal combustion engine rotating forward after a reverse rotation is oscillating or is continuing its forward movement, with the internal combustion engine having an electronic operation control unit and a sensor device in order to determine the rotational angle of the crankshaft or of a value depending thereon and the rotational direction of the crankshaft, the method comprising the steps of:
- When a reverse rotation of the crankshaft is detected, determining the covered rotational angle during a reverse rotation or the value depending thereon,
- computing an actual threshold by means of adding the covered rotational angle or the value depending thereon during a reverse rotation and a predetermined safety distance, and
- comparing the continuous rotational angle that the crankshaft covers during a forward movement following the reverse rotation, or the value depending thereon to the actual threshold.
A system for determining whether a crankshaft of an internal combustion engine rotating forward after a reverse rotation is oscillating or is continuing its forward movement, comprising an internal combustion engine having an electronic operation control unit and a sensor device in order to determine the rotational angle of the crankshaft or of a value depending thereon and the rotational direction of the crankshaft, opwherein the electronic operation control unit and sensor are operable
- to determine, when a reverse rotation of the crankshaft is detected, the covered rotational angle during a reverse rotation or the value depending thereon,
- to compute an actual threshold by means of adding the covered rotational angle or the value depending thereon during a reverse rotation and a predetermined safety distance, and
- to compare the continuous rotational angle that the crankshaft covers during a forward movement following the reverse rotation, or the value depending thereon to the actual threshold.
A method for determining whether a crankshaft of an internal combustion engine is rotating forward or oscillates, the method comprising the steps of:
- detecting a reverse rotation of the crankshaft,
- upon said detection of said reverse rotation, determining the covered rotational angle during the reverse rotation or a value depending thereon,
- computing an actual threshold by means of adding the covered rotational angle or the value depending thereon and a predetermined safety distance, and
- comparing the continuous rotational angle that the crankshaft covers during a forward movement following the reverse rotation, or a value depending thereon to the actual threshold.
Dependencies are inferred from the claim text.