US Patent Application No: 2010/0099,537

Number of patents in Portfolio can not be more than 2000

CONTROL SYSTEM FOR DUAL CLUTCH TRANSMISSION

ALSO PUBLISHED AS: 8206265

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Importance

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Abstract

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The present invention provides a control system for a dual clutch automatic transmission having a torque converter. The transmission provides seven forward speeds or gear ratios and reverse. The control system includes a hydraulic pump, a pressure regulator assembly and control valves that provide and release pressurized hydraulic fluid to the torque converter, a pair of input clutches and eight synchronizer clutches. A first pair of control valves are high flow rate valves which are capable of rapidly engaging and disengaging the input clutches. A second pair of high flow rate valves, control valves and spool valves provide a branching control circuit which controls engagement and disengagement of the synchronizer clutches. A control valve linked to the shift lever blocks hydraulic fluid flow to the first pair of high flow rate valves to inhibit input clutch activation when the shift lever is in Park or Neutral.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
GM GLOBAL TECHNOLOGY OPERATIONS LLCDETROIT, MI9891

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dougan, Kevin Michael Plymouth, MI 19 23
Firth, Darren Parramatta, AU 7 55
Maten, John R Royal Oak, MI 16 73
Tamba, Richard T Castle Hill, AU 10 27

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
GM GLOBAL TECHNOLOGY OPERATIONS LLC (2)
8,376,720 Outer ring driven gerotor pump 0 2010
8,634,997 Direct clutch control for dual clutch transmissions 0 2011
 
EATON CORPORATION (1)
8,521,380 Shift rail transmission position sensing with tolerance for sensor loss 0 2010