Four-stroking (original) (raw)
Four-stroking is a condition of two-stroke engines where combustion occurs every four strokes or more, rather than every two. Though normal in some instances at idle, extremely high engine speeds, and when letting off the throttle, such firing is uneven, noisy and may, in cases of malfunction, damage the engine if allowed to continue unabated. In chain saw operation, where natural fluctuation of chain bite during a cut can cause momentary over-revving, the full throttle mixture is adjusted for four-stroking to occur at a set high rpm, cutting engine speed and enriching lubrication.
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dbo:abstract | Four-stroking is a condition of two-stroke engines where combustion occurs every four strokes or more, rather than every two. Though normal in some instances at idle, extremely high engine speeds, and when letting off the throttle, such firing is uneven, noisy and may, in cases of malfunction, damage the engine if allowed to continue unabated. Four stroking will occur in a correctly adjusted two stroke engine at full throttle without load when the air-fuel mixture becomes overly rich and prevents the engine from running faster. At such high speeds a mixture that is too lean will cause the engine to over-rev as well as overheat, and in engines running on premixed fuel a mixture that is too lean will cause poor lubrication. In chain saw operation, where natural fluctuation of chain bite during a cut can cause momentary over-revving, the full throttle mixture is adjusted for four-stroking to occur at a set high rpm, cutting engine speed and enriching lubrication. (en) |
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dbo:wikiPageRevisionID | 1121637229 (xsd:integer) |
dbo:wikiPageWikiLink | dbr:Roots_blower dbr:Scavenge_blower dbr:Model_engine dbr:Top_dead_center dbc:Two-stroke_engine_technology dbr:Control_line dbr:Two-stroke_engine dbr:Common_knowledge dbr:Ignition_timing dbr:Turbocharger dbr:Water_skiing dbr:Outboard_motor dbr:Two-stroke_diesel_engine dbr:EMD_567 dbr:Exhaust_system dbr:Diesel_motorcycle dbr:Forced_induction dbr:Glow_fuel dbr:Kadenacy_effect dbr:Small_engine dbr:Diesel_engine dbr:Idle_(engine) dbr:Compression_ignition_engine dbr:Spark-ignition_engine dbr:Venturi_tube dbr:Schnuerle_porting dbr:Petroil dbr:Petrol_engine dbr:Scavenging_(automotive) dbr:Chain_saw dbr:Bottom_dead_center dbr:Slide_carburettor |
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dct:subject | dbc:Two-stroke_engine_technology |
gold:hypernym | dbr:Condition |
rdf:type | dbo:Disease |
rdfs:comment | Four-stroking is a condition of two-stroke engines where combustion occurs every four strokes or more, rather than every two. Though normal in some instances at idle, extremely high engine speeds, and when letting off the throttle, such firing is uneven, noisy and may, in cases of malfunction, damage the engine if allowed to continue unabated. In chain saw operation, where natural fluctuation of chain bite during a cut can cause momentary over-revving, the full throttle mixture is adjusted for four-stroking to occur at a set high rpm, cutting engine speed and enriching lubrication. (en) |
rdfs:label | Four-stroking (en) |
owl:sameAs | freebase:Four-stroking wikidata:Four-stroking https://global.dbpedia.org/id/4jnQd |
prov:wasDerivedFrom | wikipedia-en:Four-stroking?oldid=1121637229&ns=0 |
foaf:isPrimaryTopicOf | wikipedia-en:Four-stroking |
is dbo:wikiPageWikiLink of | dbr:Model_engine dbr:Two-stroke_engine dbr:Humphrey_pump dbr:Scavenging_(engine) |
is foaf:primaryTopic of | wikipedia-en:Four-stroking |