Method and control device for adapting a minimum valve stroke
AssigneeContinental Automotive GmbH
InventorsMatthias Delp, Jürgen Dingl
Life of this patent
Estimating the term…
Abstract
A method for adapting a preset value for a minimum valve stroke in an internal combustion engine, has the following steps: Replace the previous value for the minimum valve stroke with a new value; Determine an operating parameter of the internal combustion engine; Restore the previous value for the minimum valve stroke if the operating parameter is outside of a defined value range; otherwise retain the new value.
Claims18
A method for adapting and applying a preset value for a minimum valve stroke in an internal combustion engine, comprising the following steps:
- replacing a previous value for the minimum valve stroke with a new value;
- determining an operating parameter of the internal combustion engine;
- restoring the previous value for the minimum valve stroke if the operating parameter is outside of a defined value range and otherwise retaining the new value;
- identifying a demand for power corresponding to a valve stroke that is below the minimum valve stroke, and in response:
- applying the minimum valve stroke;
- and
- automatically reducing the power produced by the engine by offsetting a rotation of the camshaft to shift an opening timing of the valve.
A control device in an internal combustion engine,
- wherein the control device holds a value for a minimum valve stroke in a memory device,
- wherein the control device is further operable to change the value for the minimum valve stroke, and
- wherein the control device is further operable to:
- identify a demand for power corresponding to a valve stroke that is below the minimum valve stroke, and in response:
- apply the minimum valve stroke;
- and
- reduce the power produced by the engine by offsetting a rotation of the camshaft to shift an opening timing of the valve.
A device for adapting and applying a preset value for a minimum valve stroke in an internal combustion engine, comprising:
- means for replacing the previous value for the minimum valve stroke with a new value;
- means for determining an operating parameter of the internal combustion engine;
- means for restoring the previous value for the minimum valve stroke if the operating parameter is outside of a defined value range and otherwise for retaining the new value;
- and
- means for identifying a demand for power corresponding to a valve stroke that is below the minimum valve stroke, and in response:
- applying the minimum valve stroke;
- and
- automatically reducing the power produced by the engine by offsetting a rotation of the camshaft to shift an opening timing of the valve.
Dependencies are inferred from the claim text.