G - Physics – 01 – M
Patent
G - Physics
01
M
G01M 15/00 (2006.01) F02P 17/00 (2006.01)
Patent
CA 2166672
An engine analyzer for plotting engine cylinder firing or spark voltage information, corresponding to distinct points of a cylinder firing waveform, in histograph form to assist in identifying a cylinder-misfire condition. In an illustrative embodiment, two traces are provided. The lower trace depicts a histograph, representative of the firing or spark voltage and engine speed of each cylinder over successive engine cycles. The histograph consists of successive pairs of adjacent, vertical histo-bars, each pair representing voltage and engine speed for a single cylinder. The first histo-bar in each pair represents the spark or firing voltage for a given cylinder and the second histo-bar represents the instantaneous engine speed measured over the duration of the given cylinder. The vertical histo-bar pairs are plotted sequentially from left to right, representing successive cylinder firings. The vertical histo-bars may be of one or more colors so that the associated plot for a given cylinder of interest is easily identified. The histographs are available in both live and freeze mode. An upper trace displays primary or secondary waveforms for one or more selected cylinders.
Taraki Yosuf M.
Trsar Dale A.
Smart & Biggar
Snap-On Incorporated
Snap-On Tools Company
LandOfFree
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