Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1991-10-18
1993-11-02
Hjerpe, Richard
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
731173, 324379, 36443104, 345133, G09G 500
Patent
active
052587533
ABSTRACT:
A digital engine analyzer has an oscilloscope display and is controlled by microprocessors operating under menu-driven stored program control. The analyzer receives analog input signals from an engine being analyzed. The engine calculates and displays real-time cylinder time balance information by calculating for each cylinder the cylinder time period from the firing of that cylinder to the firing of the next cylinder, storing the cylinder time values for each cylinder for a number of successive engine cycles, averaging the time period values for each cylinder over that number of engine cycles, calculating an overall average of the cylinder averages, calculating the percentage difference between each cylinder average and the overall average and then displaying the percentage differences in both numerical and bar graph form along with the overall average value.
REFERENCES:
patent: 4055995 (1977-11-01), Armstrong et al.
patent: 4291383 (1981-09-01), Tedeschi et al.
patent: 4417467 (1983-11-01), Higgs et al.
patent: 4502324 (1985-03-01), Marino et al.
Govekar Craig F.
Jonker Gary D.
Meeker Michael B.
Piehl James R.
Putrow Michael C.
Hjerpe Richard
Snap-on Tools Corporation
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