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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ATTORNEY / AGENT: (SPONSORED)

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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Patent Owner(s)

Patent OwnerAddressTotal Patents
GM GLOBAL TECHNOLOGY OPERATIONS LLCDETROIT, MI9639

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dougan, Kevin Michael Plymouth, MI 19 28
Firth, Darren Parramatta, AU 7 59
Maten, John R Royal Oak, MI 16 77
Tamba, Richard T Castle Hill, AU 10 29

Cited Art Landscape

Patent Info (Count) # Cites Year
 
GENERAL MOTORS CORPORATION (1)
* 4,432,255 Hydraulic control for a power transmission 18 1980
 
GM GLOBAL TECHNOLOGY OPERATIONS LLC (1)
* 7,752,935 Control system for a multi-speed transmission 4 2008
 
MITSUBISHI JIDOSHA KOGYO K.K. (A.K.A. MITSUBISHI MOTORS CORPORATION) (1)
* 5,454,763 Shift control apparatus for automatic transmission and control method therefor 14 1993
 
Reinhard Moehlmann, Martin Leibbrandt (1)
* 2006/0234,826 Switching-valve arrangement for a shifting system of an automatic transmission 2006
 
TOYOTA JIDOSHA KABUSHIKI KAISHA (1)
* 6,090,008 Coast downshift control apparatus for a vehicular automatic transmission 12 1999
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
GM GLOBAL TECHNOLOGY OPERATIONS LLC (3)
* 8,376,720 Outer ring driven gerotor pump 0 2010
* 8,634,997 Direct clutch control for dual clutch transmissions 0 2011
8,904,893 Method of controlling a dual clutch transmission 0 2011
 
EATON CORPORATION (1)
* 8,521,380 Shift rail transmission position sensing with tolerance for sensor loss 0 2010
* Cited By Examiner