US Patent Application No: 2010/0099,537

Number of patents in Portfolio can not be more than 2000

CONTROL SYSTEM FOR DUAL CLUTCH TRANSMISSION

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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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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
GM GLOBAL TECHNOLOGY OPERATIONS LLCDETROIT, MI10983

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dougan, Kevin Michael Plymouth, US 11 46
Firth, Darren West Pennant Hills, AU 5 74
Maten, John R Royal Oak, US 8 92
Tamba, Richard T Castle Hill, AU 5 40

Cited Art Landscape

Patent Info (Count) # Cites Year
 
MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA (1)
* 5,454,763 Shift control apparatus for automatic transmission and control method therefor 15 1993
 
SCHAEFFLER TECHNOLOGIES GMBH & CO. KG (1)
* 2009/0321,209 HYDRAULIC ARRANGEMENT FOR CONTROLLING A TWIN-CLUTCH TRANSMISSION OF A MOTOR VEHICLE 3 2009
 
Reinhard Moehlmann, Martin Leibbrandt (1)
* 2006/0234,826 Switching-valve arrangement for a shifting system of an automatic transmission 0 2006
 
HONDA MOTOR CO., LTD. (2)
* 2007/0068,297 Hydraulic control apparatus for automatic transmission 7 2006
* 2011/0094,610 HYDRAULIC CONTROL DEVICE FOR TRANSMISSION 2 2010
 
New Venture Gear, Inc. (1)
* 6,427,547 Dual-countershaft twin-clutch automated transmission with bi-directional clutches 32 2001
 
GENERAL MOTORS CORPORATION (1)
* 4,432,255 Hydraulic control for a power transmission 18 1980
 
TOYOTA JIDOSHA KABUSHIKI KAISHA (2)
* 5,622,080 Safety interlock for preventing double engagement of forward and reverse dog clutches and shaft clutch 10 1995
* 6,090,008 Coast downshift control apparatus for a vehicular automatic transmission 12 1999
 
BORGWARNER INC. (2)
* 7,127,961 Integrated control module for a dual clutch transmission 21 2004
* 2010/0096,232 HYDRAULIC ACTUATION VALVE ARRANGEMENT FOR DUAL CLUTCH TRANSMISSION 6 2008
 
GM GLOBAL TECHNOLOGY OPERATIONS LLC (7)
* 5,347,879 Power transmission 4 1993
* 7,263,907 Dual clutch transmission with a torque converter 9 2005
* 2008/0190,228 ELECTRO-HYDRAULIC CONTROL SYSTEM WITH THREE-POSITION DOG CLUTCH ACTUATOR VALVE 13 2007
* 2008/0047,379 Powertrain With Torque Converter And Axially Compact Seven Speed Dual Clutch Transmission 13 2007
* 7,896,770 Multi-speed transmission 7 2007
* 7,752,935 Control system for a multi-speed transmission 4 2008
* 2008/0216,908 CONTROL SYSTEM FOR A MULTI-SPEED TRANSMISSION 6 2008
 
GETRAG FORD TRANSMISSIONS GMBH (1)
* 7,410,438 Switching-valve arrangement for a shifting system of an automatic transmission 12 2006
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
FUJI JUKOGYO KABUSHIKI KAISHA (1)
* 9,188,217 Range switching device 0 2013
 
AUDI AG (1)
8,915,344 Dual-clutch transmission 0 2012
 
GM GLOBAL TECHNOLOGY OPERATIONS LLC (6)
* 8,376,720 Outer ring driven gerotor pump 0 2010
* 2011/0217,192 OUTER RING DRIVEN GEROTOR PUMP 1 2010
* 8,634,997 Direct clutch control for dual clutch transmissions 0 2011
* 2012/0277,964 DIRECT CLUTCH CONTROL FOR DUAL CLUTCH TRANSMISSIONS 0 2011
8,904,893 Method of controlling a dual clutch transmission 0 2011
* 2012/0137,806 METHOD OF CONTROLLING A DUAL CLUTCH TRANSMISSION 2 2011
 
EATON CORPORATION (2)
* 8,521,380 Shift rail transmission position sensing with tolerance for sensor loss 0 2010
* 2011/0035,123 SHIFT RAIL TRANSMISSION POSITION SENSING WITH TOLERANCE FOR SENSOR LOSS 5 2010
* Cited By Examiner