Modification of shifting characteristics based upon shifting direction and drive train load

Modification of shifting characteristics based upon shifting direction and drive train load

The exemplary embodiment relates to electronically controlled powershift transmissions for large off-road vehicles. More particularly, the exemplary embodiment relates to a system and a method for shifting the transmission of an agricultural or earth moving vehicle by controlling the engagement of a...

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Hauptverfasser: Milender, Jeffrey S, Lykken, Thomas G, Kuczmarski, Bradley A
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Sprache:eng
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creator Milender, Jeffrey S
Lykken, Thomas G
Kuczmarski, Bradley A
description The exemplary embodiment relates to electronically controlled powershift transmissions for large off-road vehicles. More particularly, the exemplary embodiment relates to a system and a method for shifting the transmission of an agricultural or earth moving vehicle by controlling the engagement of a plurality of clutches in accordance with vehicle loading. An apparatus and method for controlling a plurality of clutches in a powershift transmission. The transmission is coupled to an engine of an off-road vehicle. The method includes receiving a shift command having a shift direction. Clutch timing is selected based on the shift direction. Using the selected shift timing, on-coming clutches are engaged in sequence with disengagement of off-going clutches to achieve smooth shifting.
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More particularly, the exemplary embodiment relates to a system and a method for shifting the transmission of an agricultural or earth moving vehicle by controlling the engagement of a plurality of clutches in accordance with vehicle loading. An apparatus and method for controlling a plurality of clutches in a powershift transmission. The transmission is coupled to an engine of an off-road vehicle. The method includes receiving a shift command having a shift direction. Clutch timing is selected based on the shift direction. Using the selected shift timing, on-coming clutches are engaged in sequence with disengagement of off-going clutches to achieve smooth shifting.</description><language>eng</language><creationdate>2003</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6554742$$EPDF$$P50$$Guspatents$$Hfree_for_read</linktopdf><link.rule.ids>230,308,780,802,885,64038</link.rule.ids><linktorsrc>$$Uhttps://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6554742$$EView_record_in_USPTO$$FView_record_in_$$GUSPTO$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>Milender, Jeffrey S</creatorcontrib><creatorcontrib>Lykken, Thomas G</creatorcontrib><creatorcontrib>Kuczmarski, Bradley A</creatorcontrib><creatorcontrib>Case Corporation</creatorcontrib><title>Modification of shifting characteristics based upon shifting direction and drive train load</title><description>The exemplary embodiment relates to electronically controlled powershift transmissions for large off-road vehicles. 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More particularly, the exemplary embodiment relates to a system and a method for shifting the transmission of an agricultural or earth moving vehicle by controlling the engagement of a plurality of clutches in accordance with vehicle loading. An apparatus and method for controlling a plurality of clutches in a powershift transmission. The transmission is coupled to an engine of an off-road vehicle. The method includes receiving a shift command having a shift direction. Clutch timing is selected based on the shift direction. Using the selected shift timing, on-coming clutches are engaged in sequence with disengagement of off-going clutches to achieve smooth shifting.</abstract><oa>free_for_read</oa></addata></record>
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title Modification of shifting characteristics based upon shifting direction and drive train load
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