James K Hendrickson

US Patent:

20120137806, Jun 7, 2012

Filed:

Jun 30, 2011

Appl. No.:

13/174160

Inventors:

Steven P. Moorman - Dexter MI, US
Philip C. Lundberg - Keego Harbor MI, US
John R. Czoykowski - Grosse Pointe Park MI, US
Bret M. Olson - Whitelake MI, US
Chinar S. Ghike - Livonia MI, US
James D. Hendrickson - Oxford MI, US
Christopher Jay Weingartz - Holly MI, US

Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS LLC - Detroit MI

International Classification:

F16H 3/38

US Classification:

74340

Abstract:

A method of controlling a hydraulic control system for a dual clutch transmission includes controlling a plurality of pressure and flow control devices in fluid communication with a plurality of clutch actuators and with a plurality of synchronizer actuators. The clutch actuators are operable to actuate a plurality of torque transmitting devices and the synchronizer actuators are operable to actuate a plurality of synchronizer assemblies. Selective activation of combinations of the pressure control solenoids and the flow control solenoids allows for a pressurized fluid to activate at least one of the clutch actuators and synchronizer actuators in order to shift the transmission into a desired gear ratio.

US Patent:

20120138408, Jun 7, 2012

Filed:

Jun 30, 2011

Appl. No.:

13/174147

Inventors:

STEVEN P. MOORMAN - DEXTER MI, US
PHILIP C. LUNDBERG - KEEGO HARBOR MI, US
JOHN R. CZOYKOWSKI - GROSSE POINTE PARK MI, US
BRET M. OLSON - WHITELAKE MI, US
CHINAR S. GHIKE - LIVONIA MI, US
JAMES D. HENDRICKSON - OXFORD MI, US
CHRISTOPHER JAY WEINGARTZ - HOLLY MI, US

Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS LLC - DETROIT MI

International Classification:

B60W 10/02
B60W 30/18
B60W 10/10

US Classification:

192 48601

Abstract:

A method of controlling a hydraulic control system for a dual clutch transmission includes controlling a plurality of pressure and flow control devices in fluid communication with a plurality of clutch actuators and with a plurality of synchronizer actuators. The clutch actuators are operable to actuate a plurality of torque transmitting devices and the synchronizer actuators are operable to actuate a plurality of synchronizer assemblies. Selective activation of combinations of the pressure control solenoids and the flow control solenoids allows for a pressurized fluid to activate at least one of the clutch actuators and synchronizer actuators in order to shift the transmission into a desired gear ratio.