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AssigneeSnap-on Incorporated
InventorsJames R. Piehl, Robert D. Braun, Gary S. Wollert, Craig F. Govekar
Estimating the term…
A linearly moving external part of a multi-cylinder internal combustion engine is contacted with a hand-held contact tachometer for producing a waveform signal which, along with a signal responsive to the ignition of each cylinder, are applied to an engine analyzer processor for display of a single engine cycle of the waveform signal on the CRT oscilloscope of the engine analyzer. The variations and amplitude of the waveform signal correspond to speed variations of the moving part over an engine cycle to give an indication of the relative power contributions of the individual cylinders. Cylinder ignition markers and cylinder zone markers are respectively displayed at the top and bottom of the screen, respectively corresponding to the cylinders in their ignition order. Each cylinder zone marker is delayed a predetermined time from its corresponding cylinder ignition marker and indicates the time period during which the engine responds to the ignition event of the corresponding cylinder.
Apparatus for determining relative power contributions of individual cylinders of a multi-cylinder internal combustion engine, wherein an engine cycle is a time period between consecutive ignition events of the same cylinder, said apparatus comprising:
A method for determining relative power contributions of individual cylinders of a multi-cylinder internal combustion engine, wherein an engine cycle is a time period between consecutive ignition events of the same cylinder, and wherein a cylinder cycle is the time period from the ignition event of one cylinder to the ignition event of the next cylinder in the ignition order, said method comprising the steps of:
Dependencies are inferred from the claim text.