About: Thermotime switch

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A thermotime switch, or TTS, is a sensor used to control the cold start enrichment process in some older fuel injection systems. An extra injector is placed in the inlet manifold designed to feed all of the cylinders, and whilst the other injectors have flow rates controlled by pulse duration, the cold start injector stays on during the initial cold starting procedure.

Property	Value
dbo:abstract	A thermotime switch, or TTS, is a sensor used to control the cold start enrichment process in some older fuel injection systems. An extra injector is placed in the inlet manifold designed to feed all of the cylinders, and whilst the other injectors have flow rates controlled by pulse duration, the cold start injector stays on during the initial cold starting procedure. This duration is controlled by the thermotime switch, which is a bimetallic strip based device placed in the water jacket or in the case of an air-cooled engine, in the engine/timing case. When an engine first starts, the coolant temperature is cold and the bimetallic strip is closed, which in turn supplies the cold start injector with current. A small heater coil is built into the thermotime switch, which effectively gives a timed output to the cold start injector with the timing duration dependent on the temperature of the engine. If the engine is started whilst warm the bimetallic strip remains open due to the higher temperature, meaning the cold start routine is not entered. (en)
dbo:wikiPageExternalLink	https://www.google.co.uk/books/edition/Automotive_Technician_Training/PtJgzgEACAAJ%3Fhl=en%7Cdate=2021%7Cpublisher=Routledge%7Cisbn=978-1-032-00233-0%7Cpages=155
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dbo:wikiPageWikiLink	dbr:Cylinder_(engine) dbr:Injector dbr:Inlet_manifold dbr:Coolant dbr:Fuel_injection dbc:Engine_fuel_system_technology dbr:Bimetallic_strip
dbp:wikiPageUsesTemplate	dbt:Cite_book
dcterms:subject	dbc:Engine_fuel_system_technology
gold:hypernym	dbr:Sensor
rdf:type	dbo:InformationAppliance
rdfs:comment	A thermotime switch, or TTS, is a sensor used to control the cold start enrichment process in some older fuel injection systems. An extra injector is placed in the inlet manifold designed to feed all of the cylinders, and whilst the other injectors have flow rates controlled by pulse duration, the cold start injector stays on during the initial cold starting procedure. (en)
rdfs:label	Thermotime switch (en)
owl:sameAs	freebase:Thermotime switch wikidata:Thermotime switch https://global.dbpedia.org/id/4wECV
prov:wasDerivedFrom	wikipedia-en:Thermotime_switch?oldid=1063378225&ns=0
foaf:isPrimaryTopicOf	wikipedia-en:Thermotime_switch
is dbo:wikiPageWikiLink of	dbr:Bimetallic_strip
is foaf:primaryTopic of	wikipedia-en:Thermotime_switch

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