Method for controlling an internal combustion engine
View Patent ↗An internal combustion engine has a camshaft whose phase can be adjusted with respect to a crankshaft by means of a setting mechanism. Also provided are a crankshaft sensor which senses the crankshaft angle and a camshaft sensor which senses the camshaft angle. The method comprises the following steps: A reference value for the phase is adapted in a predefined position of the setting mechanism when a predefined condition is satisfied. A measurement value for the phase is determined depending on the sensed crankshaft angle and camshaft angle. A corrected measurement value for the phase is determined depending on the reference value and the measurement value for the phase. A control signal for controlling the internal combustion engine is determined depending on the corrected measurement value.
1. A method for controlling an internal combustion engine having a camshaft, a crankshaft sensor, and a camshaft sensor, comprising:
adapting a reference value for a phase of the camshaft in a predefined position of a setting mechanism when a predefined condition is satisfied:
determining a measurement value for the phase depending on a sensed crankshaft angle and a camshaft angle;
determining a corrected measurement value for the phase depending on the reference value and the measurement value for the phase; and
determining a control signal for controlling the internal combustion engine depending on the corrected measurement value,
wherein the predefined condition is satisfied when a motor vehicle containing the internal combustion engine has traveled a predefined journey distance since the last adaptation and a set of predefined ambient conditions are present.
2. The method according to claim 1 , wherein the set of ambient conditions are present when the temperature of the internal combustion engine lies within a predefined range.
3. The method according to claim 1 wherein the adaptation takes place near a time when the internal combustion engine starts up.
4. The Method according to claim 1 , wherein the adaptation takes place depending on a variable that is characteristic of a load on the internal combustion engine.
5. A method for controlling an internal combustion engine having a camshaft, a crankshaft sensor, and a camshaft sensor, comprising:
adapting a reference value for a phase of the camshaft in a predefined position of a setting mechanism when a predefined condition is satisfied;
determining a measurement value for the phase depending on a sensed crankshaft angle and a camshaft angle;
determining a corrected measurement value for the phase depending on the reference value and the measurement value for the phase; and
determining a control signal for controlling the internal combustion engine depending on the corrected measurement value,
wherein the adaptation takes place depending on a variable that is characteristic of a load on the internal combustion engine,
wherein the variable that is characteristic of the load on the internal combustion engine is the journey distance.
6. The method according to claim 4 , wherein the variable that is characteristic of the load on the internal combustion engine is a variable that is characteristic of the full-load accelerations.
7. A method for controlling an internal combustion engine having a camshaft, a crankshaft sensor, and a camshaft sensor, comprising:
adapting a reference value for a phase of the camshaft in a predefined position of a setting mechanism when a predefined condition is satisfied;
determining a measurement value for the phase depending on a sensed crankshaft angle and a camshaft angle;
determining a corrected measurement value for the phase depending on the reference value and the measurement value for the phase; and
determining a control signal for controlling the internal combustion engine depending on the corrected measurement value,
wherein the adaptation takes place depending on a variable that is characteristic of a load on the internal combustion engine,
wherein the variable that is characteristic of loads on the internal combustion engine is a variable that is characteristic of the uneven running state.
8. The method according to claim 4 , wherein the variable that is characteristic of the load on the internal combustion engine is the period of operation of the internal combustion engine.
9. A method for controlling an internal combustion engine having a camshaft, a crankshaft sensor, and a camshaft sensor, comprising:
adapting a reference value for a phase of the camshaft in a predefined position of a setting mechanism when a predefined condition is satisfied;
determining a measurement value for the phase depending on a sensed crankshaft angle and a camshaft angle;
determining a corrected measurement value for the phase depending on the reference value and the measurement value for the phase; and
determining a control signal for controlling the internal combustion engine depending on the corrected measurement value,
wherein diagnostics are performed on the internal combustion engine depending on the adapted reference value or a value defining the adaptation.
10. The method according to claim 5 , wherein the variable that is characteristic of the load on the internal combustion engine is a variable that is characteristic of the full-load accelerations.
11. The method according to claim 7 , wherein the variable that is characteristic of the load on the internal combustion engine is the period of operation of the internal combustion engine.