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GB2018068A - Digital timing apparatus - Google Patents

Digital timing apparatus

Info

Publication number
GB2018068A
GB2018068A GB7907000A GB7907000A GB2018068A GB 2018068 A GB2018068 A GB 2018068A GB 7907000 A GB7907000 A GB 7907000A GB 7907000 A GB7907000 A GB 7907000A GB 2018068 A GB2018068 A GB 2018068A
Authority
GB
United Kingdom
Prior art keywords
reference signal
timing signals
pair
phase relationship
timing
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
GB7907000A
Other versions
GB2018068B (en
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.)
Caterpillar Inc
Original Assignee
Caterpillar Tractor Co
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 US05/892,222 external-priority patent/US4141242A/en
Application filed by Caterpillar Tractor Co filed Critical Caterpillar Tractor Co
Publication of GB2018068A publication Critical patent/GB2018068A/en
Application granted granted Critical
Publication of GB2018068B publication Critical patent/GB2018068B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M15/00—Testing of engines
    • G01M15/04—Testing internal-combustion engines
    • G01M15/06—Testing internal-combustion engines by monitoring positions of pistons or cranks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M15/00—Testing of engines
    • G01M15/04—Testing internal-combustion engines
    • G01M15/09—Testing internal-combustion engines by monitoring pressure in fluid ducts, e.g. in lubrication or cooling parts
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Testing Of Engines (AREA)

Abstract

The invention relates to a digital timing apparatus for measuring the phase relationship between a plurality of cyclically occuring events in, for example, an internal combustion engine. The apparatus has first means (74) for receiving and digitizing (eg forming a two state signal from) a cyclic continually oscillating reference signal having positive, negative and zero- crossover portions and for receiving and digitizing a plurality of timing signals, corresponding to the cylically occuring events, each timing signal having positive, negative and zero- crossover portions and second means (84) for displaying the phase relationship between a pair of the timing signals in terms of reference signal digits (eg number of high level states ocurring between them), in decimal format. A third means (86), is provided for measuring the period of the digitized reference signal as a proportion of the total cycle, and fourth means (88), coupled to the first, second and third means, automatically controls operation of the second and third means and causes the displayed phase relationship between the pair of timing signals and the period of the digitized reference signal to be compounded to provide a measure of the time between the pair of timing signals in terms of degrees of the total cycle. <IMAGE>
GB7907000A 1978-03-31 1979-02-28 Digital tuning apparatus Expired GB2018068B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/892,222 US4141242A (en) 1977-06-07 1978-03-31 Apparatus for dynamically timing a diesel engine

Publications (2)

Publication Number Publication Date
GB2018068A true GB2018068A (en) 1979-10-10
GB2018068B GB2018068B (en) 1982-06-23

Family

ID=25399584

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7907000A Expired GB2018068B (en) 1978-03-31 1979-02-28 Digital tuning apparatus

Country Status (2)

Country Link
JP (1) JPS54134226A (en)
GB (1) GB2018068B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2526944A1 (en) * 1982-05-12 1983-11-18 Avl Verbrennungskraft Messtech INSTALLATION FOR AUTOMATICALLY PERFORMING THE DIAGNOSIS OF A FOUR-STROKE INTERNAL COMBUSTION ENGINE
EP0250683A1 (en) * 1986-05-01 1988-01-07 Tektronix, Inc. Tracking sample and hold phase detector

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4620198A (en) * 1985-11-20 1986-10-28 Xerox Corporation Multicolor ink jet printhead

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4023403A (en) * 1975-07-11 1977-05-17 Scans Associates, Inc. Method and apparatus for timing diesel engines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2526944A1 (en) * 1982-05-12 1983-11-18 Avl Verbrennungskraft Messtech INSTALLATION FOR AUTOMATICALLY PERFORMING THE DIAGNOSIS OF A FOUR-STROKE INTERNAL COMBUSTION ENGINE
EP0250683A1 (en) * 1986-05-01 1988-01-07 Tektronix, Inc. Tracking sample and hold phase detector

Also Published As

Publication number Publication date
GB2018068B (en) 1982-06-23
JPS54134226A (en) 1979-10-18

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee