Method and apparatus for monitoring a multiple step valve lifter
A method and system for monitoring performance of an internal combustion engine equipped with individually actuated valve control mechanisms, such as a two-step finger-follower rocker-arm assembly, using a strategy that identifies cylinder-to-cylinder variations, is disclosed. The method and system...
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| creator | SMITH JAMES CRAIG DARROW JON C |
| description | A method and system for monitoring performance of an internal combustion engine equipped with individually actuated valve control mechanisms, such as a two-step finger-follower rocker-arm assembly, using a strategy that identifies cylinder-to-cylinder variations, is disclosed. The method and system preferably include monitoring engine operating conditions, based upon input from an exhaust gas sensor and engine sensors, and determining an engine operating point. Individual cylinder fueling modifiers are determined, each corresponding to one of the cylinders at the determined engine operating point, based upon input from the exhaust gas sensor. It is determined that the each individually actuated valve control mechanism is operating properly when a difference between the individual cylinder fueling modifier and a predetermined individual cylinder fueling modifier, each said modifier determined for the corresponding cylinder at the determined engine operating point, is less than a predetermined difference. |
| format | Patent |
| fullrecord | <record><control><sourceid>epo_EVB</sourceid><recordid>TN_cdi_epo_espacenet_US7047957B1</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>US7047957B1</sourcerecordid><originalsourceid>FETCH-epo_espacenet_US7047957B13</originalsourceid><addsrcrecordid>eNrjZHDwTS3JyE9RSMwD4oKCxKLEktJihbT8IoXc_LzMkvyizLx0hUSF3NKcksyCnFSF4pLUAoWyxJyyVIWczLSS1CIeBta0xJziVF4ozc2g4OYa4uyhm1qQH59aXJCYnJqXWhIfGmxuYGJuaWruZGhMhBIAe6cxRA</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>patent</recordtype></control><display><type>patent</type><title>Method and apparatus for monitoring a multiple step valve lifter</title><source>esp@cenet</source><creator>SMITH JAMES CRAIG ; DARROW JON C</creator><creatorcontrib>SMITH JAMES CRAIG ; DARROW JON C</creatorcontrib><description>A method and system for monitoring performance of an internal combustion engine equipped with individually actuated valve control mechanisms, such as a two-step finger-follower rocker-arm assembly, using a strategy that identifies cylinder-to-cylinder variations, is disclosed. The method and system preferably include monitoring engine operating conditions, based upon input from an exhaust gas sensor and engine sensors, and determining an engine operating point. Individual cylinder fueling modifiers are determined, each corresponding to one of the cylinders at the determined engine operating point, based upon input from the exhaust gas sensor. It is determined that the each individually actuated valve control mechanism is operating properly when a difference between the individual cylinder fueling modifier and a predetermined individual cylinder fueling modifier, each said modifier determined for the corresponding cylinder at the determined engine operating point, is less than a predetermined difference.</description><language>eng</language><subject>BLASTING ; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION ; COMBUSTION ENGINES ; CONTROLLING COMBUSTION ENGINES ; CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES ; ENGINE PLANTS IN GENERAL ; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC ; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS ; HEATING ; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS ; LIGHTING ; MACHINES OR ENGINES IN GENERAL ; MECHANICAL ENGINEERING ; STEAM ENGINES ; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE ; WEAPONS</subject><creationdate>2006</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&date=20060523&DB=EPODOC&CC=US&NR=7047957B1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76290</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20060523&DB=EPODOC&CC=US&NR=7047957B1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>SMITH JAMES CRAIG</creatorcontrib><creatorcontrib>DARROW JON C</creatorcontrib><title>Method and apparatus for monitoring a multiple step valve lifter</title><description>A method and system for monitoring performance of an internal combustion engine equipped with individually actuated valve control mechanisms, such as a two-step finger-follower rocker-arm assembly, using a strategy that identifies cylinder-to-cylinder variations, is disclosed. The method and system preferably include monitoring engine operating conditions, based upon input from an exhaust gas sensor and engine sensors, and determining an engine operating point. Individual cylinder fueling modifiers are determined, each corresponding to one of the cylinders at the determined engine operating point, based upon input from the exhaust gas sensor. It is determined that the each individually actuated valve control mechanism is operating properly when a difference between the individual cylinder fueling modifier and a predetermined individual cylinder fueling modifier, each said modifier determined for the corresponding cylinder at the determined engine operating point, is less than a predetermined difference.</description><subject>BLASTING</subject><subject>CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION</subject><subject>COMBUSTION ENGINES</subject><subject>CONTROLLING COMBUSTION ENGINES</subject><subject>CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES</subject><subject>ENGINE PLANTS IN GENERAL</subject><subject>GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC</subject><subject>GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS</subject><subject>HEATING</subject><subject>HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS</subject><subject>LIGHTING</subject><subject>MACHINES OR ENGINES IN GENERAL</subject><subject>MECHANICAL ENGINEERING</subject><subject>STEAM ENGINES</subject><subject>TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS</subject><subject>TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE</subject><subject>WEAPONS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2006</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZHDwTS3JyE9RSMwD4oKCxKLEktJihbT8IoXc_LzMkvyizLx0hUSF3NKcksyCnFSF4pLUAoWyxJyyVIWczLSS1CIeBta0xJziVF4ozc2g4OYa4uyhm1qQH59aXJCYnJqXWhIfGmxuYGJuaWruZGhMhBIAe6cxRA</recordid><startdate>20060523</startdate><enddate>20060523</enddate><creator>SMITH JAMES CRAIG</creator><creator>DARROW JON C</creator><scope>EVB</scope></search><sort><creationdate>20060523</creationdate><title>Method and apparatus for monitoring a multiple step valve lifter</title><author>SMITH JAMES CRAIG ; DARROW JON C</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US7047957B13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2006</creationdate><topic>BLASTING</topic><topic>CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION</topic><topic>COMBUSTION ENGINES</topic><topic>CONTROLLING COMBUSTION ENGINES</topic><topic>CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES</topic><topic>ENGINE PLANTS IN GENERAL</topic><topic>GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC</topic><topic>GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS</topic><topic>HEATING</topic><topic>HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS</topic><topic>LIGHTING</topic><topic>MACHINES OR ENGINES IN GENERAL</topic><topic>MECHANICAL ENGINEERING</topic><topic>STEAM ENGINES</topic><topic>TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS</topic><topic>TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE</topic><topic>WEAPONS</topic><toplevel>online_resources</toplevel><creatorcontrib>SMITH JAMES CRAIG</creatorcontrib><creatorcontrib>DARROW JON C</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>SMITH JAMES CRAIG</au><au>DARROW JON C</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Method and apparatus for monitoring a multiple step valve lifter</title><date>2006-05-23</date><risdate>2006</risdate><abstract>A method and system for monitoring performance of an internal combustion engine equipped with individually actuated valve control mechanisms, such as a two-step finger-follower rocker-arm assembly, using a strategy that identifies cylinder-to-cylinder variations, is disclosed. The method and system preferably include monitoring engine operating conditions, based upon input from an exhaust gas sensor and engine sensors, and determining an engine operating point. Individual cylinder fueling modifiers are determined, each corresponding to one of the cylinders at the determined engine operating point, based upon input from the exhaust gas sensor. It is determined that the each individually actuated valve control mechanism is operating properly when a difference between the individual cylinder fueling modifier and a predetermined individual cylinder fueling modifier, each said modifier determined for the corresponding cylinder at the determined engine operating point, is less than a predetermined difference.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | BLASTING CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES ENGINE PLANTS IN GENERAL GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING STEAM ENGINES TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE WEAPONS |
| title | Method and apparatus for monitoring a multiple step valve lifter |
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