Control system for dual clutch transmission

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8206265
APP PUB NO 20100099537A1
SERIAL NO

12254965

Stats

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, MI12358

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dougan, Kevin Michael Plymouth, US 12 64
Firth, Darren West Pennant Hills, AU 5 80
Maten, John R Royal Oak, US 8 105
Tamba, Richard T Castle Hill, AU 5 52

Cited Art Landscape

Patent Info (Count) # Cites Year
 
MITSUBISHI JIDOSHA KOGYO K.K. (A.K.A. MITSUBISHI MOTORS CORPORATION) (1)
* 5454763 Shift control apparatus for automatic transmission and control method therefor 15 1993
 
HONDA MOTOR CO., LTD. (2)
* 2007/0068,297 Hydraulic control apparatus for automatic transmission 8 2006
* 2011/0094,610 HYDRAULIC CONTROL DEVICE FOR TRANSMISSION 2 2010
 
GENERAL MOTORS CORPORATION (1)
* 4432255 Hydraulic control for a power transmission 18 1980
 
NEW VENTURE GEAR, INC. (1)
* 6427547 Dual-countershaft twin-clutch automated transmission with bi-directional clutches 32 2001
 
TOYOTA JIDOSHA KABUSHIKI KAISHA (2)
* 5622080 Safety interlock for preventing double engagement of forward and reverse dog clutches and shaft clutch 10 1995
* 6090008 Coast downshift control apparatus for a vehicular automatic transmission 12 1999
 
BORGWARNER INC. (2)
* 7127961 Integrated control module for a dual clutch transmission 22 2004
* 2010/0096,232 HYDRAULIC ACTUATION VALVE ARRANGEMENT FOR DUAL CLUTCH TRANSMISSION 7 2008
 
GM GLOBAL TECHNOLOGY OPERATIONS LLC (7)
* 5347879 Power transmission 4 1993
* 7263907 Dual clutch transmission with a torque converter 11 2005
* 2008/0190,228 ELECTRO-HYDRAULIC CONTROL SYSTEM WITH THREE-POSITION DOG CLUTCH ACTUATOR VALVE 14 2007
* 2008/0047,379 Powertrain With Torque Converter And Axially Compact Seven Speed Dual Clutch Transmission 14 2007
* 7896770 Multi-speed transmission 11 2007
* 7752935 Control system for a multi-speed transmission 4 2008
* 2008/0216,908 CONTROL SYSTEM FOR A MULTI-SPEED TRANSMISSION 7 2008
 
SCHAEFFLER TECHNOLOGIES AG & CO. KG (1)
* 2009/0321,209 HYDRAULIC ARRANGEMENT FOR CONTROLLING A TWIN-CLUTCH TRANSMISSION OF A MOTOR VEHICLE 4 2009
 
GETRAG FORD TRANSMISSIONS GMBH (1)
* 7410438 Switching-valve arrangement for a shifting system of an automatic transmission 13 2006
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (1)
* 9394972 Automatic transmission with improved efficency 0 2013
 
HONDA MOTOR CO., LTD. (1)
8978500 Hydraulic pressure supply apparatus for transmission 0 2012
 
GM GLOBAL TECHNOLOGY OPERATIONS LLC (10)
* 8356529 Hydraulic control systems for dual clutch transmissions 6 2009
* 2011/0056,316 HYDRAULIC CONTROL SYSTEMS FOR DUAL CLUTCH TRANSMISSIONS 2 2009
* 8359941 Hydraulic control systems for dual clutch transmissions 7 2009
* 2011/0077,122 HYDRAULIC CONTROL SYSTEMS FOR DUAL CLUTCH TRANSMISSIONS 4 2009
* 8475336 Hydraulic control system for a dual clutch transmission 7 2010
* 2011/0028,271 HYDRAULIC CONTROL SYSTEM FOR A DUAL CLUTCH TRANSMISSION 5 2010
8904893 Method of controlling a dual clutch transmission 0 2011
* 2012/0137,806 METHOD OF CONTROLLING A DUAL CLUTCH TRANSMISSION 3 2011
* 9341199 Torque converter hydraulic control system for an automatic transmission 0 2013
* 2014/0047,828 TORQUE CONVERTER HYDRAULIC CONTROL SYSTEM FOR AN AUTOMATIC TRANSMISSION 3 2013
 
SCHAEFFLER TECHNOLOGIES AG & CO. KG (2)
* 9038492 Hydraulic arrangement for actuating a plurality of shift rails 0 2012
* 2012/0272,769 HYDRAULIC ARRANGEMENT FOR ACTUATING A PLURALITY OF SHIFT RAILS 0 2012
* Cited By Examiner

Maintenance Fees

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7.5 Year Payment $3600.00 $1800.00 $900.00 Dec 26, 2019
11.5 Year Payment $7400.00 $3700.00 $1850.00 Dec 26, 2023
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Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00