1. A method of controlling a linked valve actuator system, comprising adjusting the actuator near an end stop based on a learned uncertainty end stop region, the region based on operating conditions.
2. The method of claim 1, wherein adjusting the actuator includes gradually moving the valve toward the end stop upon reaching an edge of the learned uncertainty end stop region.
3. The method of claim 2, wherein the valve is moved toward the end stop upon reaching the edge while the operating conditions are acceptably satisfied.
4. The method of claim 2, wherein the operating conditions include desired boost, the gradual movement of the valve limited such that the desired boost is not unacceptably overshot.
5. The method of claim 2, wherein the operating conditions include a surge condition, the gradual movement of the valve limited according to the surge condition such that turbocharger compressor surge does not occur.
6. The method of claim 1, wherein the learned uncertainty end stop region is based on one or more previously learned uncertainty end stop regions.
7. The method of claim 1, further comprising reducing a magnitude of the learned uncertainty end stop region as a number of previously learned uncertainty end stop regions increases.
8. The method of claim 1, further comprising increasing a magnitude of the learned uncertainty end stop region as a difference between an operating temperature associated with the learned uncertainty end stop region and an operating temperature associated with a previously learned uncertainty end stop region increases.
9. The method of claim 1, further comprising increasing a magnitude of the learned uncertainty end stop region as a difference between a time at which the learned uncertainty end stop region was learned and a time at which a previously learned uncertainty end stop region was learned increases.
10. A method of operating a wastegate comprising a wastegate valve, comprising:
determining an uncertainty region in which a wastegate valve end stop is located;
truncating a wastegate valve lift falling in the uncertainty region to an edge of the uncertainty region;
walking the wastegate valve from the edge into the uncertainty region responsive to operating conditions; and
updating the uncertainty region based on the walking.
11. The method of claim 10, wherein the wastegate valve is walked into the uncertainty region to a lift as close to a non-truncated wastegate valve lift as possible according to the operating conditions.
12. The method of claim 10, wherein the operating conditions include desired boost, the wastegate valve walking limited such that the desired boost is not unacceptably overshot.
13. The method of claim 10, wherein the operating conditions include a surge condition, the wastegate valve walking limited according to the surge condition such that turbocharger compressor surge does not occur.
14. The method of claim 10, further comprising measuring an end stop location of the wastegate valve if allowed by the operating conditions.
15. The method of claim 10, wherein updating the uncertainty region includes reducing a magnitude of the uncertainty region in proportion to a distance walked by the wastegate valve into the uncertainty region.
16. The method of claim 10, further comprising updating the uncertainty region based on one or more previously learned uncertainty regions.
17. The method of claim 16, wherein updating the uncertainty region based on the one or more previously learned uncertainty regions includes comparing a time at which the uncertainty region was learned to respective times at which the one or more previously learned uncertainty regions were learned.
18. A method of operating a wastegate, comprising:
positioning a wastegate valve to achieve desired boost;
and adjusting the positioning in a region where a valve seat location is uncertain.
19. The method of claim 18, wherein adjusting the positioning includes gradually advancing the wastegate valve toward successively lower lifts upon reaching an edge of the region until achieving contact with a valve seat if advancement does not prevent one or more operating parameters from being acceptably satisfied.
20. The method of claim 19, wherein adjusting the positioning includes maintaining the wastegate valve at an edge of the region upon reaching the edge, and not advancing the wastegate valve toward successively lower lifts if advancement prevents one or more operating conditions from being acceptably satisfied.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A catalyst for the acidolysis of an aromatic hydroperoxy compound, prepared by a method comprising gasifying liquid sulfuric anhydride and dissolving gasified sulfuric anhydride into a ketone solvent.
2. The catalyst according to claim 1, wherein the ketone solvent is acetone andor methyl isobutyl ketone.
3. The catalyst according to claim 2, wherein the ketone solvent is acetone.
4. A process for producing an aromatic hydroxy compound, which comprises subjecting an aromatic hydroperoxy compound to an acidolysis in the presence of the catalyst of claim 1.
5. A process for producing an aromatic hydroxy compound, which comprises subjecting an aromatic hydroperoxy compound to an acidolysis in the presence of the catalyst of claim 2.
6. A process for producing an aromatic hydroxy compound, which comprises subjecting an aromatic hydroperoxy compound to an acidolysis in the presence of the catalyst of claim 3.
7. The process according to claim 4, wherein, the aromatic hydroperoxy compound is a di(hydroperoxyalkyl)benzene.
8. The process according to claim 5, wherein, the aromatic hydroperoxy compound is a di(hydroperoxyalkyl)benzene.
9. The process according to claim 6, wherein, the aromatic hydroperoxy compound is a di(hydroperoxyalkyl)benzene.
10. The process according to claim 7, wherein, the di(hydroperoxyalkyl)benzene is di(2-hydroperoxy-2-propyl)benzene.
11. The process according to claim 8, wherein, the di(hydroperoxyalkyl)benzene is di(2-hydroperoxy-2-propyl)benzene.
12. The process according to claim 9, wherein, the di(hydroperoxyalkyl)benzene is di(2-hydroperoxy-2-propyl)benzene.