| 摘要 |
Computer-implemented methods, computer program products, and computer systems are described for determining cylinder health characteristic in a reciprocating piston engine of the type including a piston-cylinder assembly and a crankshaft. The piston-cylinder assembly includes a cylinder and a piston configured to translate within the cylinder as the crankshaft rotates. In one embodiment, the computer-implemented method includes rotating the crankshaft in a first direction, while generating a first data set comprising a first plurality of piston position measurements and corresponding pressure indicator measurements. The crankshaft is further rotated in a second opposing direction, while a second data set is generated comprising a second plurality of piston position measurements and corresponding pressure indicator measurements. A symmetric aspect between the first and second data sets is then identified and utilized to determining a cylinder health characteristic for the piston-cylinder assembly. |
| 主权项 |
1. A computer-implemented method of determining a leakage characteristic associated with one or more cylinders in which one or more pistons are configured to move cyclical motion, the computer-implemented method comprising:
progressing a piston in a first direction, along a first piston stroke included in the cyclical motion, toward an expected top dead center position of the piston; determining, by one or more computing devices, as part of a first data set, a plurality of first positions of the piston as the piston is progressed in the first direction along the first piston stroke; determining, by the one or more computing devices, as part of the first data set, a plurality of first pressure indicators corresponding to the plurality of first positions; progressing the piston in a second direction, along a second piston stroke included in the cyclical motion, toward the expected top dead center position of the piston; determining, by one or more computing devices, as part of a second data set, a plurality of second positions of the piston as the piston is progressed in the second direction along the second piston stroke; determining, by the one or more computing devices, as part of the second data set, a plurality of second pressure indicators corresponding to the plurality of second positions; determining, by the one or more computing devices, one or more first symmetric aspects of the first data set with respect to the second data set; and determining, by the one or more computing devices, a leakage characteristic associated with the one or more cylinders based at least in part upon the determined one or more first symmetric aspects. |
