Determining engine cylinder contribution from indexed engine data
AssigneeSnap-on Incorporated
InventorsRobert D. DeCarlo, Michael B. Meeker, Dennis M. Mutzabaugh, Ronald M. J. Lammers, Nicolaas M. J. Stoffels
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Abstract
An engine diagnostic system is provided that enables a service technician to evaluate engine cylinder contribution to output power. The service technician couples one or more signal leads to the vehicle's battery, alternator, or accessory receptacle (e.g., cigarette lighter receptacle) to provide an alternator output signal to a signal analyzer. The signal analyzer processes the alternator output signal to generate an engine signature, which represents engine cylinder contribution to engine output power.
Claims8
A system for processing indexed engine data, the system comprising:
- means for calculating a number of indexed engine samples per engine cycle;
- and
- means for constructing an engine cycles signal using the number of indexed engine samples per engine cycle.
A method for processing indexed engine data, the method comprising:
- calculating a number of indexed engine samples per engine cycle;
- and
- constructing an engine cycles signal using the number of indexed engine samples per engine cycle.
Dependencies are inferred from the claim text.