Diagnosing a fuel tank condition

Diagnosing a fuel tank condition

A method is presented for diagnosing a condition in a fuel vapour purge system. An engine 200, fuel tank 210 and carbon canister 230 are connected in a three-way connection. The engine 200 can be selectively isolated by a purge control valve (270, figure 3), and the fuel tank 210 can be selectively...

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Hauptverfasser: BRENT EDWARD SEALY, JEFFREY ALLEN DOERING, JAE DOO CHUNG
Format: Patent
Sprache:eng
Schlagworte:
BLASTING
COMBUSTION ENGINES
HEATING
HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
LIGHTING
MECHANICAL ENGINEERING
SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF
WEAPONS
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creator BRENT EDWARD SEALY
JEFFREY ALLEN DOERING
JAE DOO CHUNG
description A method is presented for diagnosing a condition in a fuel vapour purge system. An engine 200, fuel tank 210 and carbon canister 230 are connected in a three-way connection. The engine 200 can be selectively isolated by a purge control valve (270, figure 3), and the fuel tank 210 can be selectively isolated by a fuel tank control valve (250, figure 3). The operation of both valves is coordinated by an electronic engine controller 120. By isolating the fuel tank 210 and comparing the actual rate of change of the internal tank pressure (from the tank pressure sensor 260) to the estimated rate of change (from engine operating conditions eg bulk fuel temperature) it is possible to determine if a condition (eg missing fuel cap) occurred, and whether it is in the tank or in the vapour purge lines.
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The engine 200 can be selectively isolated by a purge control valve (270, figure 3), and the fuel tank 210 can be selectively isolated by a fuel tank control valve (250, figure 3). The operation of both valves is coordinated by an electronic engine controller 120. By isolating the fuel tank 210 and comparing the actual rate of change of the internal tank pressure (from the tank pressure sensor 260) to the estimated rate of change (from engine operating conditions eg bulk fuel temperature) it is possible to determine if a condition (eg missing fuel cap) occurred, and whether it is in the tank or in the vapour purge lines.</description><edition>7</edition><language>eng</language><subject>BLASTING ; COMBUSTION ENGINES ; HEATING ; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS ; LIGHTING ; MECHANICAL ENGINEERING ; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF ; WEAPONS</subject><creationdate>2002</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=20020703&amp;DB=EPODOC&amp;CC=GB&amp;NR=2370642A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25543,76294</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&amp;date=20020703&amp;DB=EPODOC&amp;CC=GB&amp;NR=2370642A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>BRENT EDWARD SEALY</creatorcontrib><creatorcontrib>JEFFREY ALLEN DOERING</creatorcontrib><creatorcontrib>JAE DOO CHUNG</creatorcontrib><title>Diagnosing a fuel tank condition</title><description>A method is presented for diagnosing a condition in a fuel vapour purge system. 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An engine 200, fuel tank 210 and carbon canister 230 are connected in a three-way connection. The engine 200 can be selectively isolated by a purge control valve (270, figure 3), and the fuel tank 210 can be selectively isolated by a fuel tank control valve (250, figure 3). The operation of both valves is coordinated by an electronic engine controller 120. By isolating the fuel tank 210 and comparing the actual rate of change of the internal tank pressure (from the tank pressure sensor 260) to the estimated rate of change (from engine operating conditions eg bulk fuel temperature) it is possible to determine if a condition (eg missing fuel cap) occurred, and whether it is in the tank or in the vapour purge lines.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record>
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subjects BLASTING
COMBUSTION ENGINES
HEATING
HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
LIGHTING
MECHANICAL ENGINEERING
SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF
WEAPONS
title Diagnosing a fuel tank condition
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