Patent ID: 9243571
Filing Date: 2016-01-26
CPC Classification: F02D

Claim Text:
1. A computer-implemented method of identifying top dead center for one or more pistons configured to move in cyclical motion within one or more cylinders, 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, an updated top dead center position for the piston based upon, at least in part, the determined one or more first symmetric aspects.