초록 ▼

A system and method for controlling an internal combustion engine to improve air/fuel ratio control using a feed-forward observer-based control strategy include estimating current and future airflow actuator positions, determining corresponding mass airflow values, and determining a future in-cylind

A system and method for controlling an internal combustion engine to improve air/fuel ratio control using a feed-forward observer-based control strategy include estimating current and future airflow actuator positions, determining corresponding mass airflow values, and determining a future in-cylinder air charge based on a difference between the current and future mass airflow values. In one embodiment, the difference between current and future mass airflow estimates is used as a feed-forward term and combined with a sensed or measured value generated by a mass airflow sensor prior to being processed using a manifold filling model to predict the future cylinder air charge. In another embodiment, the current and future mass airflow estimates are processed using the manifold filling model with the results used to generate a future delta cylinder air charge that is subsequently used as a feed-forward term and combined with a measured air charge corresponding to a measured mass airflow processed by the manifold filling model.

대표청구항 ▼

A system and method for controlling an internal combustion engine to improve air/fuel ratio control using a feed-forward observer-based control strategy include estimating current and future airflow actuator positions, determining corresponding mass airflow values, and determining a future in-cylind

A system and method for controlling an internal combustion engine to improve air/fuel ratio control using a feed-forward observer-based control strategy include estimating current and future airflow actuator positions, determining corresponding mass airflow values, and determining a future in-cylinder air charge based on a difference between the current and future mass airflow values. In one embodiment, the difference between current and future mass airflow estimates is used as a feed-forward term and combined with a sensed or measured value generated by a mass airflow sensor prior to being processed using a manifold filling model to predict the future cylinder air charge. In another embodiment, the current and future mass airflow estimates are processed using the manifold filling model with the results used to generate a future delta cylinder air charge that is subsequently used as a feed-forward term and combined with a measured air charge corresponding to a measured mass airflow processed by the manifold filling model. opening angle having a bisecting line intercepting the pivot axis. 4. The device according to claim 1, wherein the adjusting device is arranged in the area of the at least one joint. 5. The device according to claim 1, wherein several of the adjusting devices are provided so as to engage the adjustable bending jaw and are arranged successively at a spacing to one another across a length of the adjustable bending jaw. 6. The device according to claim 1, wherein the adjusting device is supported on the stationary bending jaw. 7. The device according to claim 1, wherein the adjustable bending jaw has at least one bearing part and is supported with the at least one bearing part in the stationary bending jaw. 8. The device according to claim 7, wherein across a length of the pivotable bending jaw several of the bearing parts are provided spaced at a distance from one another. 9. The device according to claim 7, wherein the stationary bending jaw has at least one bearing axle projecting through the at least one bearing part of the adjustable bending jaw. 10. The device according to claim 9, wherein the at least one bearing part is seated rotatably on the at least one bearing axle. 11. The device according to claim 9, wherein the at least one bearing part is arranged axially fixedly on the at least one bearing axle. 12. A bending device comprising: one or more bending tools, each bending tool having one or more adjustable bending jaws and one or more stationery bending jaws configured to produces a fold on a sheet metal plate, wherein the adjustable bending jaw is pivotably supported on the stationary bending jaw so as to be pivotable about a pivot axis; at least one joint connecting the adjustable bending jaw and the stationary bending jaw to one another; at least one adjusting device engaging the adjustable bending jaw; wherein the adjusting device has a piston connected pivotably to the adjustable bending jaw. 13. A bending device comprising: one or more bending tools, each bending tool having one or more adjustable bending jaws and one or more stationary bending jaws configured to produce a fold on a sheet metal plate, wherein the adjustable bending jaw is pivotably supported on the stationary bending jaw so as to be pivotable about a pivot axis; wherein the adjustable bending jaw has at least one bearing part and is supported with the at least one bearing part in the stationary bending jaw; wherein the stationary bending jaw has at least one bearing axle projecting through the at least one bearing part of the adjustable bending jaw; wherein the stationary bending jaw has at least one depression and the at least one bearing part projects into the at least one depression. 14. The device according to claim 13, wherein the width of the at least one depression measured in an axial direction of the bearing axle matches a width of the at least one bearing part. 15. A bending device comprising: one or more bending tools, each bending tool having one or more adjustable bending jaws and one or more stationary bending jaws configured to produce a fold on a sheet metal plate, wherein the adjustable bending jaw is pivotably supported on the stationary bending jaw so as to be pivotable about a pivot axis; and a carriage configured to provide height adjustment for the adjustable and stationary bending jaws. 16. The device according to claim 15, wherein the carriage comprises a spindle drive for height adjustment. 17. The device according to claim 15, further comprising a support, wherein the carriage is arranged on the support. 18. The device according to claim 17, wherein the support is movable horizontally. 19. The device according to claim 15, wherein the bending tool is rotatably supported on the carriage. 20. The device according to claim 15, wherein two of the bending tools are arranged on the carriage. 21. The device according to claim 20, wherein the two bending tools are arranged mirror-symmetrically to one anot