Gm Global Technolgoy Operations, Inc.

John R Czoykowski

Steven Patrick Moorman

Bret M Olson

Philip C Lundberg

Chinar S Ghike

Christopher Jay Weingartz

James D Hendrickson

Nancy L Johnson

Alan L Browne

Paul W Alexander

Nilesh D Mankame

Xiujie Gao

Robin Stevenson

Todd R Berger

Mark A Vernacchia

Stephen W Powell

Michael L Duhaime

Peter Donald Bock

Jonathan Hottenstein

Neal Parsons

Christopher J Landino

Bradford E Vorbeck

Jason R Spenny

James Bloomsburgh

A hydraulic control system for a transmission is provided. The hydraulic control system includes a source of pressurized hydraulic fluid that communicates with a discrete electronic transmission range selection (ETRS) subsystem. The hydraulic control system includes first and second mode valves located downstream of a hydraulic fluid pressure source. The mode valves are supplied with fluid via one or more solenoid valves or other valves. The mode valves have a plurality of ports configured to transfer pressurized hydraulic fluid. The first mode valve transfers pressurized hydraulic fluid from the source to the second mode valve. The second mode valve transfers pressurized hydraulic fluid from the first mode valve to one of drive or reverse. An electro-hydraulic circuit for pulling the transmission out of park and putting the transmission into park is also provided. A park sensor assembly including a Hall Effect sensor switch is also provided.

Discrete mechanism for electronic transmission range selection

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.

Method of controlling a dual clutch transmission

A hydraulic control system for a dual clutch transmission includes a plurality of pressure and flow control devices and logic valve assemblies 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.

Electro-hydraulic control system for a dual clutch transmission

A hydraulic control system for a dual clutch transmission includes 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.

Control system for a dual clutch transmission

A hydraulic control system and method for controlling a dual clutch transmission includes a plurality of pressure and flow control devices and logic valve assemblies 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.

Control system and method for a dual clutch transmission

Electro-hydraulic control system and method for a dual clutch transmission

A hydraulic control system for a transmission includes a first source of pressurized hydraulic fluid for providing a first flow of hydraulic fluid, a second source of pressurized hydraulic fluid for providing a second flow of hydraulic fluid, and a torque converter control subsystem for controlling a torque converter and a torque converter clutch. The torque converter control subsystem includes a torque converter control valve and a solenoid. The solenoid is multiplexed to the torque converter control valve and the torque converter clutch. The torque converter control valve is operable to control a flow of hydraulic fluid to the torque converter and to other subsystems within the hydraulic control system.

Hydraulic control system for an automatic transmission having a three path torque converter control subsystem

A hydraulic control system for a transmission includes a first source of pressurized hydraulic fluid, a second source of pressurized hydraulic fluid, a lubrication subsystem for communicating a pressurized hydraulic fluid through the transmission, and a fluid control device in communication with the first source of pressurized hydraulic fluid. A lubrication regulation valve is in communication with the first and second sources of pressurized hydraulic fluid, the fluid control device, and the lubrication subsystem. The lubrication regulation valve allows fluid communication from the first source of pressurized hydraulic fluid to the lubrication subsystem when in a first position, the valve allows fluid communication from the first and second source of pressurized hydraulic fluid to the lubrication subsystem when in a second position, and the valve allows fluid communication from the first source of pressurized hydraulic fluid through the flow restriction device to the lubrication subsystem when in a third position.

Hydraulic control system for an automatic transmission having a lubrication regulation valve

A control system for a hybrid drive unit includes a pressure regulator valve, a first variable bleed solenoid valve for controlling a stationary clutch and a second variable bleed solenoid valve for controlling a rotating clutch. The control system controls the stationary clutch and the rotating clutch to operate the hybrid drive unit in four different modes.

Electro-hydraulic control system for a hybrid drive unit

A vent includes a vane configured for spatial movement, and at least one actuator in operative communication with the vane configured to spatially move the vane in at least one direction, wherein the actuator comprises an active material configured to undergo a change in at least one property upon receipt of an activation signal, wherein the change in at least one property is effective to selectively change an orientation of the vane.

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Grosse Pointe Park, MI, United States of America

John R Czoykowski