Method for determining a phase position of an adjustable camshaft
AssigneeRobert Bosch GmbH
InventorsTorsten Baumann, Oliver Krannich, Andreas Lassl
Life of this patent
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Abstract
A method for determining a phase position of an adjustable camshaft of an internal combustion engine having a sensor wheel and a camshaft adjuster. The phase position of the camshaft is determined on the basis of phase flank interrupts triggered by the sensor wheel and a model which depends on at least one performance characteristic of the camshaft adjuster.
Claims10
A method for determining a phase position of an adjustable camshaft of an internal combustion engine having a sensor wheel and a camshaft adjuster, the method comprising:
- determining a first phase position of the camshaft in relation to a crankshaft based on a phase flank interrupt triggered by the sensor wheel, wherein the phase flank interrupt is triggered at a first time point;
- extrapolating a second phase position of the camshaft in relation to the crankshaft from the first phase position, based on a model which depends on at least one performance characteristic of the camshaft adjuster, wherein the second phase position corresponds to a second time point after the first time point, and wherein the camshaft is synchronized to the crankshaft based on the extrapolated second phase position.
A computer readable medium having a computer program, which is executable by a processor, comprising:
- a program code arrangement having program code for determining a phase position of an adjustable camshaft of an internal combustion engine having a sensor wheel and a camshaft adjuster, by performing the following:
- determining a first phase position of the camshaft in relation to a crankshaft based on a phase flank interrupt triggered by the sensor wheel, wherein the phase flank interrupt is triggered at a first time point;
- and
- extrapolating a second phase position of the camshaft in relation to the crankshaft from the first phase position, based on a model which depends on at least one performance characteristic of the camshaft adjuster, wherein the second phase position corresponds to a second time point after the first time point, and wherein the camshaft is synchronized to the crankshaft based on the extrapolated second phase position.
An electronic control unit, comprising:
- a computer readable medium having a computer program, which is executable by a processor, including:
- a program code arrangement having program code for determining a phase position of an adjustable camshaft of an internal combustion engine having a sensor wheel and a camshaft adjuster, by performing the following:
- determining a first phase position of the camshaft in relation to a crankshaft based on a phase flank interrupt triggered by the sensor wheel, wherein the phase flank interrupt is triggered at a first time point;
- and
- extrapolating a second phase position of the camshaft in relation to the crankshaft from the first phase position, based on a model which depends on at least one performance characteristic of the camshaft adjuster, wherein the second phase position corresponds to a second time point after the first time point, and the camshaft is synchronized to the crankshaft based on the extrapolated second phase position.
Dependencies are inferred from the claim text.