US Patent: 5,247,287 - Digital Engine Analyzer


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US Patent: 5,247,287

Digital Engine Analyzer

Patentees:

Gary D. Jonker (exact or similar names) - Kenosha, WI

Craig F. Govekar (exact or similar names) - Gurnee, IL

Michael B. Meeker (exact or similar names) - Kenosha, WI

James R. Piehl (exact or similar names) - Kenosha, WI

Michael C. Putrow (exact or similar names) - Racine, WI

John C. Sniegowski (exact or similar names) - Kenosha, WI

USPTO Classifications:

324/121R, 324/379, 345/440.1, 701/102, 702/67

Tool Categories:

Assignees:

Snap-On Tools Corp. - Kenosha, WI

Manufacturer:

Not known to have been produced

Witnesses:

none listed

Patent Dates:
Applied:	Oct. 18, 1991
Granted:	Sep. 21, 1993

Patent Pictures:

USPTO (New site tip)
Google Patents
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Snap-On Tools Company History

Description:

Emrich & Dithmar - patent attorneys

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, digitizes the signals, captures the digital peak ignition voltage values for each cylinder and stores only these values for each cylinder over a number of successive engine cycles, and then simultaneously displays all the stored values for any one cylinder over a number of engine cycles to provide a historical display. Each peak value is stored twice and displayed twice to provide width to the value display and effectively produce a bar graph-type display.