CA2239912A1 - Digital engine analyzer - Google Patents

Digital engine analyzer

Info

Publication number
CA2239912A1
CA2239912A1 CA 2239912 CA2239912A CA2239912A1 CA 2239912 A1 CA2239912 A1 CA 2239912A1 CA 2239912 CA2239912 CA 2239912 CA 2239912 A CA2239912 A CA 2239912A CA 2239912 A1 CA2239912 A1 CA 2239912A1
Authority
CA
Canada
Prior art keywords
engine
analyzer
keyboard
display
analog input
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA 2239912
Other languages
French (fr)
Other versions
CA2239912C (en
Inventor
John C. Sniegowski
James R. Piehl
Gary D. Jonker
Craig F. Govekar
Michael C. Putrow
Michael B. Meeker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Snap On Inc
Original Assignee
Snap-On Incorporated
Snap-On Tools Corporation
John C. Sniegowski
James R. Piehl
Gary D. Jonker
Craig F. Govekar
Michael C. Putrow
Michael B. Meeker
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US07/587,357 external-priority patent/US5250935A/en
Application filed by Snap-On Incorporated, Snap-On Tools Corporation, John C. Sniegowski, James R. Piehl, Gary D. Jonker, Craig F. Govekar, Michael C. Putrow, Michael B. Meeker filed Critical Snap-On Incorporated
Publication of CA2239912A1 publication Critical patent/CA2239912A1/en
Application granted granted Critical
Publication of CA2239912C publication Critical patent/CA2239912C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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, engine identification and parameter data entered via a keyboard, function and mode data selected by keyboard, and data communicated from an engine on-board computer via a hand-held scanner device. The analyzer calculates and displays spark plug burn time information derived from a single analog input signal, a historical display of peak ignition voltage values for a selected cylinder over a number of engine cycles and real time cylinder time balance information. Peak capture circuitry permit the display of a full cylinder period of a waveform, even though it contains very high frequency portions, by selectively switching between normal and high resolution modes. The scanner interface permits the scanner control functions to be effected from the analyzer keyboard.
CA002239912A 1990-09-24 1991-08-01 Digital engine analyzer Expired - Fee Related CA2239912C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US587,357 1990-09-24
US07/587,357 US5250935A (en) 1990-09-24 1990-09-24 Waveform peak capture circuit for digital engine analyzer
CA002048299A CA2048299C (en) 1990-09-24 1991-08-01 Digital engine analyzer

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002048299A Division CA2048299C (en) 1990-09-24 1991-08-01 Digital engine analyzer

Publications (2)

Publication Number Publication Date
CA2239912A1 true CA2239912A1 (en) 1992-03-25
CA2239912C CA2239912C (en) 2000-02-15

Family

ID=25674715

Family Applications (2)

Application Number Title Priority Date Filing Date
CA002239915A Expired - Fee Related CA2239915C (en) 1990-09-24 1991-08-01 Digital engine analyzer
CA002239912A Expired - Fee Related CA2239912C (en) 1990-09-24 1991-08-01 Digital engine analyzer

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CA002239915A Expired - Fee Related CA2239915C (en) 1990-09-24 1991-08-01 Digital engine analyzer

Country Status (1)

Country Link
CA (2) CA2239915C (en)

Also Published As

Publication number Publication date
CA2239912C (en) 2000-02-15
CA2239915A1 (en) 1992-03-25
CA2239915C (en) 2000-04-25

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Legal Events

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