1) A method for corrective action on the operation of a line for the production of absorbent sanitary articles, such as nappies for babies or incontinence pads for adults, sanitary towels or the like, each article comprising a plurality of components which are gradually positioned relative to each other and assembled along the production line; the method being characterised in that it comprises the steps of:
capturing at least one image of each article being fed out of the line;
using the image to define first parameters indicating the positioning andor assembly andor shape of at least one respective component;
detecting a production defect if at least one of the first parameters is outside a respective acceptability range;
identifying second, line operating parameters which are used to indicate if the first parameter is outside the respective acceptability range;
comparing the line operating parameters with respective third, reference parameters indicating optimum line operation;
deriving from the comparison a map of parameters indicating abnormal operation;
checking if each combination of abnormal operating parameters indicates a respective cause of line malfunction, the respective cause being included in a case record of causes of malfunction which is preset and predefined;
defining, for each cause of malfunction encountered, the corrective action to be adopted in order to eliminate the production defect.
2) The method according to claim 1, characterised in that the corrective action is displayed in the form of instructions on a display for subsequent guided action by an operator.
3) The method according to claim 2, characterised in that the instructions contain a sequence of step-by-step instructions for guiding the operator to correct the defect.
4) The method according to claim 1, characterised in that the corrective action is automatically converted into action controlling actuator means acting on the production line for adjusting the operating parameters.
5) The method according to claim 1, characterised in that the step of capturing at least one image is performed using means for inspection of the article.
6) The method according to claim 5, characterised in that the inspection means comprise at least one sensor for capturing the image and acquisition means for defining the first parameters.
7) The method according to claim 6, characterised in that the sensor is in the form of a video camera.
8) The method according to claim 1, characterised in that the case record of causes of malfunction is contained in a preset and predefined database.
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 fuel control system for an internal combustion engine, comprising:
a first module that determines a corrected injected fuel mass based on an engine temperature and a measured burned fuel mass;
a second module that determines a raw injected fuel mass based on said corrected injected fuel mass and said engine temperature; and
a third module that regulates fueling to a cylinder of said engine based on said raw injected fuel mass.
2. The fuel control system of claim 1 wherein said measured burned fuel mass is determined based on a commanded equivalency ratio (EQR) and a cylinder air mass.
3. The fuel control system of claim 2 further comprising a fourth module that estimates said cylinder air mass based on engine operating conditions.
4. The fuel control system of claim 1 wherein said first module determines said corrected injected fuel mass further based on a previous corrected injected fuel mass, a current measured burned fuel mass and a previous measured burned fuel mass.
5. The fuel control system of claim 1 wherein said second module determines said raw injected fuel mass based on a utilized fuel fraction that is a ratio of said corrected injected fuel mass to said raw injected fuel mass.
6. The fuel control system of claim 5 wherein said utilized fuel fraction is determined based on a scalar function that is a ratio of said measured burned fuel mass and said raw injected burned fuel mass that is determined at a threshold engine cycle.
7. A method of regulating fuel to an internal combustion engine, comprising:
determining a corrected injected fuel mass based on an engine temperature and a measured burned fuel mass;
determining a raw injected fuel mass based on said corrected injected fuel mass and said engine temperature; and
regulating fueling to a cylinder of said engine based on said raw injected fuel mass.
8. The method of claim 7 wherein said measured burned fuel mass is determined based on a commanded equivalency ratio (EQR) and a cylinder air mass.
9. The method of claim 8 further comprising estimating said cylinder air mass based on engine operating conditions.
10. The method of claim 7 wherein said corrected injected fuel mass is further determined based on a previous corrected injected fuel mass, a current measured burned fuel mass and a previous measured burned fuel mass.
11. The method of claim 7 wherein said raw injected fuel mass is further determined based on a utilized fuel fraction that is a ratio of said corrected injected fuel mass to said raw injected fuel mass.
12. The method of claim 11 wherein further comprising calculating said utilized fuel fraction based on a scalar function that is a ratio of said measured burned fuel mass and said raw injected burned fuel mass that is determined at a threshold engine cycle.
13. A method of regulating fuel to an internal combustion engine, comprising:
estimating a cylinder air mass for a combustion event;
calculating a measured burned fuel mass based on said cylinder air mass;
determining a corrected injected fuel mass based on an engine temperature and said measured burned fuel mass;
determining a raw injected fuel mass for said combustion event based on said corrected injected fuel mass and said engine temperature; and
regulating fueling to a cylinder of said engine based on said raw injected fuel mass to provide sufficient fuel for said combustion event.
14. The method of claim 13 wherein said measured burned fuel mass is further determined based on a commanded equivalency ratio (EQR).
15. The method of claim 13 wherein said cylinder air mass is estimated based on engine operating conditions.
16. The method of claim 13 wherein said corrected injected fuel mass is further determined based on a previous corrected injected fuel mass, a current measured burned fuel mass and a previous measured burned fuel mass.
17. The method of claim 13 wherein said raw injected fuel mass is further determined based on a utilized fuel fraction that is a ratio of said corrected injected fuel mass to said raw injected fuel mass.
18. The method of claim 17 wherein further comprising calculating said utilized fuel fraction based on a scalar function that is a ratio of said measured burned fuel mass and said raw injected burned fuel mass that is determined at a threshold engine cycle.