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Statements

Subject Item

dbr:Timing_mark

rdf:type

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rdfs:label

Timing mark

rdfs:comment

A timing mark is an indicator used for setting the timing of the ignition system of an engine, typically found on the crankshaft pulley (as pictured) or the flywheel, being the largest radius rotating at crankshaft speed and therefore the place where marks at one degree intervals will be farthest apart. Modern engines usually use a crank sensor directly connected to the engine management system. The term can also be used to describe the timing patterns used in some barcodes, such as PostBar, Data Matrix, Aztec Code, etc.

foaf:depiction

n7:Timing_marks.svg

dcterms:subject

dbc:Synchronization dbc:Engine_technology dbc:Ignition_systems

dbo:wikiPageID

3117746

dbo:wikiPageRevisionID

927931921

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dbr:Distributor dbr:Top_dead_centre dbr:Crankshaft dbr:PostBar dbc:Engine_technology dbr:Ignition_system dbr:Engine dbr:Timing_light dbc:Synchronization n17:Timing_marks.svg dbr:Engine_management_system dbr:Aztec_Code dbc:Ignition_systems dbr:Flywheel dbr:Barcode dbr:Ignition_timing dbr:Data_Matrix dbr:Optical_mark_recognition dbr:Stroboscopic_effect dbr:Crank_sensor

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dbt:Automotive_engine dbt:Unreferenced

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n7:Timing_marks.svg?width=300

dbo:abstract

A timing mark is an indicator used for setting the timing of the ignition system of an engine, typically found on the crankshaft pulley (as pictured) or the flywheel, being the largest radius rotating at crankshaft speed and therefore the place where marks at one degree intervals will be farthest apart. On older engines it is common to set the ignition timing using a timing light, which flashes in time with the ignition system (and hence engine rotation), so when shone on the timing marks makes them appear stationary due to the stroboscopic effect. The ignition timing can then be adjusted to fire at the correct point in the engine's rotation, typically a few degrees before top dead centre and advancing with increasing engine speed. The timing can be adjusted by loosening and slightly rotating the distributor in its seat. Modern engines usually use a crank sensor directly connected to the engine management system. The term can also be used to describe the tick marks along the length of an optical mark recognition sheet, used to confirm the location of the sheet as it passes through the reader. See, for example, U.S. Patent 3,218,439 (filed 1964, granted 1965), which refers to a timing track down the left side of the form, and U.S. Patent 3,267,258 (filed 1963, granted 1966), which refers to a column of timing marks on the right side of the form. The term can also be used to describe the timing patterns used in some barcodes, such as PostBar, Data Matrix, Aztec Code, etc.

gold:hypernym

dbr:Indicator

prov:wasDerivedFrom

wikipedia-en:Timing_mark?oldid=927931921&ns=0

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1837

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wikipedia-en:Timing_mark