Patent application number | Description | Published |
20090254256 | TRANSMISSION OIL MEASUREMENT SYSTEM AND METHOD - A system includes a pressure sensor that measures a transmission fluid pressure at a first fluid cavity of a transmission. A transmission control module receives the transmission fluid pressure, determines a transmission fluid temperature in the first fluid cavity based on the transmission fluid pressure, and controls the transmission fluid pressure based on the transmission fluid temperature. | 10-08-2009 |
20100072408 | MULTIPLEXING CONTROL VALVE - A multiplexing valve assembly includes a valve slidably disposed within a valve body, hydraulic module, or packaged in a stand alone solenoid cartridge. A plurality of fluid passages communicate with the multiplexing valve assembly. The valve includes a plurality of lands. Radial fluid passages disposed in the lands and a longitudinal fluid passage disposed in the valve allow hydraulic fluid within the fluid passages to be selectively exhausted via a single exhaust port. Movement of the valve within the valve body directs hydraulic fluid from one or more input fluid passages to a plurality of outlet fluid passages. The valve is actuated directly by an armature in the solenoid directly acting on the valve or through hydraulic fluid controlled by a solenoid. | 03-25-2010 |
20100148099 | SHIFT ACTUATOR VALVE HAVING A PRESSURE DEAD BAND - A valve assembly having a pressure dead band includes a first valve or sleeve slidably disposed within a valve body. A second valve is partially slidably disposed within the first valve and partially slidably disposed in the valve body. A plurality of fluid passages communicate with the valve assembly and provide a first flow of hydraulic fluid and a second flow of hydraulic fluid. A lower threshold of the pressure dead band is defined by the pressure on the combination of the first area of the first valve and the first area of the second valve required to balance the resultant force developed on the second area of the second valve. An upper threshold of the pressure dead band is defined by the pressure on the first area of the second valve required to balance the resultant force developed on the second area of the second valve. | 06-17-2010 |
20100190606 | CONTROL SYSTEM FOR A DUAL CLUTCH TRANSMISSION - A hydraulic control system for a dual clutch transmission includes a plurality of solenoids and valves 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 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. | 07-29-2010 |
20100326542 | CONTROL SYSTEM FOR AN AUTOMATIC TRANSMISSION HAVING MULTIPLE DEFAULT MODES - A hydraulic control system for a automatic transmission includes a plurality of solenoids and valves in fluid communication with a plurality of shift actuators. The shift actuators are operable to actuate a plurality of torque transmitting devices. Selective activation of combinations of the solenoids allows for a pressurized fluid to activate at least one of the shift actuators. The solenoids are configured to provide a forward gear ratio and a reverse gear ratio when the solenoids are deengerized. | 12-30-2010 |
20110028271 | HYDRAULIC CONTROL SYSTEM FOR A DUAL CLUTCH TRANSMISSION - A hydraulic control system for a dual clutch transmission includes a plurality of solenoids and valves 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 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. | 02-03-2011 |
20110048222 | PISTON ACTUATOR ASSEMBLY - A piston actuator assembly having includes a piston liner slidably disposed within a housing. A piston is slidably disposed within the piston liner and partially slidably disposed in the valve body. A plurality of pressurized fluid passages communicate with the piston actuator assembly and provide a first flow of hydraulic fluid and a second flow of hydraulic fluid. A plurality of seals maintains separate fluid pressure chambers selectively pressurized to achieve a plurality of actuator positions. A plurality of exhaust passages communicate with the piston actuator assembly providing pressure relief to allow for predictive movement of the piston and piston liner. | 03-03-2011 |
20110056314 | HYDRAULIC CONTROL SYSTEMS FOR DUAL CLUTCH TRANSMISSIONS - The present invention comprehends a plurality of embodiments of a hydraulic control system for various configurations of dual clutch transmissions. The hydraulic control systems all include a regulated source of pressurized hydraulic fluid including an electric pump, a filter and an accumulator, a pair of pressure control valves and a branching hydraulic circuit including pressure or flow control valves, spool or logic valves and two position valves which collectively supply and exhaust hydraulic fluid from a plurality of shift actuators. The actuators are connected to shift rails which include shift forks and are slidable to engage synchronizers and positive clutches associated with the various gear ratios. | 03-10-2011 |
20110056315 | HYDRAULIC CONTROL SYSTEMS FOR DUAL CLUTCH TRANSMISSIONS - The present invention comprehends two embodiments of a hydraulic control system for a dual clutch transmission. The hydraulic control systems include a regulated source of pressurized hydraulic fluid including an electric pump, a filter and an accumulator, a pair of pressure control valves and a branching hydraulic circuit including pressure or flow control valves, spool or logic valves and two position valves which collectively supply and exhaust hydraulic fluid from a plurality of shift actuators. The actuators are connected to shift rails which include shift forks and are slidable to engage synchronizers and positive clutches associated with the various gear ratios. | 03-10-2011 |
20110056316 | HYDRAULIC CONTROL SYSTEMS FOR DUAL CLUTCH TRANSMISSIONS - The present invention comprehends a plurality of embodiments of a hydraulic control system for various configurations of dual clutch transmissions. The hydraulic control systems all include a regulated source of pressurized hydraulic fluid including an electric pump, a filter and an accumulator, a pair of pressure control valves and a branching hydraulic circuit including pressure or flow control valves, spool or logic valves and two position valves which collectively supply and exhaust hydraulic fluid from a plurality of shift actuators. The actuators are connected to shift rails which include shift forks and are slidable to engage synchronizers and positive clutches associated with the various gear ratios. | 03-10-2011 |
20110077122 | HYDRAULIC CONTROL SYSTEMS FOR DUAL CLUTCH TRANSMISSIONS - The present invention comprehends a plurality of embodiments of a hydraulic control system for various configurations of dual clutch transmissions. The hydraulic control systems all include a regulated source of pressurized hydraulic fluid including an electric pump, a filter and an accumulator, a pair of pressure control valves and a branching hydraulic circuit including pressure or flow control valves, spool or logic valves and two position valves which collectively supply and exhaust hydraulic fluid from a plurality of shift actuators. The actuators are connected to shift rails which include shift forks and are slidable to engage synchronizers and positive clutches associated with the various gear ratios. | 03-31-2011 |
20110092335 | HYDRAULIC CONTROL SYSTEMS FOR DUAL CLUTCH TRANSMISSIONS - The present invention comprehends a plurality of embodiments of a hydraulic control system for various configurations of dual clutch transmissions. The hydraulic control systems all include a regulated source of pressurized hydraulic fluid including an electric pump, a filter and an accumulator, a pair of pressure control valves and a branching hydraulic circuit including pressure or flow control valves, spool or logic valves and two position valves which collectively supply and exhaust hydraulic fluid from a plurality of shift actuators. The actuators are connected to shift rails which include shift forks and are slidable to engage synchronizers and positive clutches associated with the various gear ratios. | 04-21-2011 |
20110100144 | BARREL CAM SHIFT MECHANISM - A shift mechanism for a dual clutch transmission employs a rotating barrel cam having at least three tracks which are engaged by and translate at least three associated cam followers. The cam followers extend from shift fork bodies which slide on rails and include shift forks which bi-directionally translate at least three synchronizer clutches which engage at least five forward gears or speeds and reverse. A single electric motor and gear train drive the barrel cam. | 05-05-2011 |
20110112737 | METHOD OF DETECTING FILLING OF HYDRAULIC CLUTCH - A method of detecting substantial filling of a hydraulic cylinder of a hydraulically operated clutch of a vehicular transmission is disclosed and claimed. A pressure sensor disposed in a hydraulic line to the clutch cylinder provides a signal that the hydraulic pressure has dropped as the clutch cylinder begins to fill and also that the pressure has returned to a substantially normal level. The pressure sensor may be a continuously variable output such as an analog sensor, pulse width modulation (PWM) sensor, a similar device or, less desirably, a two state sensor. An iterative algorithm utilizes data from the sensor and a timer to determine when clutch fill is substantially complete. | 05-12-2011 |
20110132711 | 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. | 06-09-2011 |
20110132716 | 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. | 06-09-2011 |
20110139279 | HYDRAULIC FLUID SUPPLY SYSTEM HAVING ACTIVE REGULATOR - A hydraulic fluid supply system includes an active pressure regulator or feed limit valve with a flow cut-off which may be used with dual clutch transmission hydraulic control systems. The supply system includes a pump, a filter, pressure relief and filter bypass valves, an accumulator, a system pressure sensor and the active feed limit valve. The active feed limit and flow cut-off valve includes an on-off solenoid valve and a spool or logic valve having an inlet port, an outlet port, a control port, a feedback port and an exhaust port. The inlet port is supplied with pressurized hydraulic fluid and the control port is supplied with hydraulic fluid from the solenoid control valve when it is energized. A valve spool having a pair of spaced-apart lands is biased toward the control port. One side of a check valve is in fluid communication with the feedback port. The outlet port provides controlled pressure and flow of hydraulic fluid to the hydraulic control system and is in fluid communication with the other side of the check valve. | 06-16-2011 |
20110139564 | 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 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. | 06-16-2011 |
20110168510 | HYDRAULIC CONTROL SYSTEMS FOR DUAL CLUTCH TRANSMISSIONS - The present invention comprehends two embodiments of a hydraulic control system for a dual clutch transmission. The hydraulic control systems include a regulated source of pressurized hydraulic fluid including an electric pump, a filter and an accumulator, a pair of pressure control valves and a branching hydraulic circuit including pressure or flow control valves, spool or logic valves and two position valves which collectively supply and exhaust hydraulic fluid from a plurality of shift actuators. The actuators are connected to shift rails which include shift forks and are slidable to engage synchronizers and positive clutches associated with the various gear ratios. | 07-14-2011 |
20110180364 | 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 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. | 07-28-2011 |
20110198178 | HIGH EFFICIENCY HYDRAULIC TRANSMISSION CONTROL SYSTEM - A high efficiency hydraulic control system for a dual clutch transmission includes one or two hydraulic pumps. In a first embodiment, a single hydraulic pump provides pressurized hydraulic fluid to a pressure control valve, filter and accumulator. A first pair of variable feed solenoid valves independently and mutually exclusively provide hydraulic fluid to a respective pair of main or input clutch actuators. A second pair of variable feed solenoid valves provide hydraulic fluid to a pair of inlet ports of a first spool or logic valve. The position of the spool of the first logic valve is controlled by an on-off solenoid valve. A first pair of outlet ports of the first logic valve selectively provide hydraulic fluid to a first three area piston which selects two gear or speed ratios, for example, reverse and third gear. A second pair of outlet ports of the first logic valve selectively provide hydraulic fluid to a pair of inlet ports of a second spool or logic valve. The position of the spool of the second logic valve is controlled by hydraulic fluid from the input clutch circuits. A first pair of ports of the second logic valve selectively provide hydraulic fluid to a second three area piston which selects two other gear or speed ratios, for example, first and fifth gears and a second pair of ports of the second logic valve selectively provide hydraulic fluid to a third three area piston which selects two additional gear or speed ratios, for example, second and fourth gears. | 08-18-2011 |
20110198179 | LOW CONTENT CONTROL SYSTEM FOR A DUAL CLUTCH TRANSMISSION - A hydraulic control system for a dual clutch transmission includes a source of pressurized hydraulic fluid, first and second actuator control devices in downstream fluid communication with the source of pressurized hydraulic fluid, and first and second clutch control devices in downstream fluid communication with the source of pressurized hydraulic fluid. A first valve is in downstream fluid communication with the first and second actuator control devices. A second valve is in downstream fluid communication with the first valve, the first clutch control device and the second clutch control device, and the second valve is moveable between two positions by the first and second clutch control devices. Selective activation of combinations of the control devices allows for a pressurized fluid to engage the dual clutch and an actuator in order to shift the transmission into a desired gear ratio. | 08-18-2011 |
20110198180 | HYDRAULIC CONTROL SYSTEM FOR A DUAL CLUTCH TRANSMISSION - A hydraulic control system for a dual clutch transmission includes a plurality of solenoids and valves 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 solenoids allows for a pressurized fluid to flow through the valves to activate at least one of the clutch actuators and synchronizer actuators in order to shift the transmission into a desired gear ratio. A range selection valve is operable to place the transmission in Park and out-of-Park modes of operation. | 08-18-2011 |
20110203401 | MULTIPLEXED ELECTROMECHANICAL ACTUATOR MECHANISM - A multiplexed electromechanical shift mechanism includes a single linear actuator with multiple independently selectable linkages actuating a clutch and multiple gears for use in motor vehicle transmissions such as a dual clutch transmission. The linear actuator may be a ball screw, a planetary roller screw or hydraulic or pneumatic operator capable of controlling bi-directional linear motion of an output member. A plurality of linear clutches selectively couple the output member to one of a plurality of linkages adapted to transfer the bi-directional motion of the output member. One of the linkages is coupled to and engages an input (main) clutch of the transmission and the remaining linkages are coupled to and bi-directionally translate shift forks and synchronizer clutches which achieve gear selection and engagement. | 08-25-2011 |
20110209470 | TRANSMISSION HYDRAULIC CONTROL SYSTEM HAVING A PUMP BYPASS VALVE - A system for providing pressurized hydraulic fluid in a transmission of a motor vehicle includes a pump for providing pressurized hydraulic fluid having an inlet port and an outlet port. A bypass valve includes an inlet port in communication with the outlet port of the pump, a first outlet port in communication with the inlet port of the pump, and a second outlet port. The inlet port of the bypass valve is in communication with the second outlet port of the bypass valve when the bypass valve is in a first position and the inlet port of the bypass valve is in communication with the first outlet port of the bypass valve when the bypass valve is in a second position. A control device and accumulator are operatively associated with the bypass valve. | 09-01-2011 |
20110272118 | HYDRAULIC FLUID COOLING SYSTEM FOR A DUAL CLUTCH AUTOMATIC TRANSMISSION - A system for providing a constant flow of cooled hydraulic fluid to a dual clutch assembly of a transmission of a motor vehicle includes a hydraulic fluid cooler, a pressure control valve and a logic valve. The system is also capable of providing additional hydraulic fluid to the dual clutch assembly. The hydraulic fluid cooler provides hydraulic fluid to each clutch of a dual clutch assembly and to a logic valve. The logic valve is operable to divert additional fluid flow to either of the clutches of the dual clutch assembly. | 11-10-2011 |
20110297499 | WET DUAL CLUTCH TRANSMISSION CONTROL SYSTEM - A high efficiency hydraulic control system for a wet dual clutch transmission includes an engine driven hydraulic pump. A first pair of variable feed solenoid valves independently and mutually exclusively provide hydraulic fluid to a respective pair of main or input clutch actuators. A second pair of variable feed solenoid valves provide hydraulic fluid to a pair of inlet ports of a first spool or logic valve. The position of the spool of the first logic valve is controlled by an on-off solenoid valve. A first pair of outlet ports of the first logic valve selectively provide hydraulic fluid to a first three area piston which selects two gear or speed ratios, for example, reverse and third gear. A second pair of outlet ports of the first logic valve selectively provide hydraulic fluid to a pair of inlet ports of a second spool or logic valve. The position of the spool of the second logic valve is controlled by hydraulic fluid from the input clutch circuits. A first pair of ports of the second logic valve selectively provide hydraulic fluid to a second three area piston which selects two other gear or speed ratios, for example, first and fifth gears and a second pair of ports of the second logic valve selectively provide hydraulic fluid to a third three area piston which selects two additional gear or speed ratios, for example, second and fourth gears. | 12-08-2011 |
20110303049 | ELECTRO-HYDRAULIC AND ELECTRO-MECHANICAL CONTROL SYSTEM FOR A DUAL CLUTCH TRANSMISSION - A control system for controlling a dual clutch transmission having a synchronizer assembly includes a motor for selectively providing an output torque in a first and second to both of a first and a second output member. A one-way device is interconnected to the first output member and is operable to transmit the output torque in the first rotational direction. A pump is connected to the one-way device. A disconnect device is interconnected to the second output member. The torque disconnect device is operable to decouple the motor from a cam or a torque multiplication device. The cam includes at least one groove having a configuration corresponding to synchronizer assembly positions. A shift fork is disposed in the groove and is operable to translate the synchronizer assembly. Rotation of the cam translates the shift fork and the synchronizer assembly between at least a neutral position and an engaged position. | 12-15-2011 |
20120000743 | HILL-HOLDER ASSEMBLY FOR A TRANSMISSION - A device operable in a transmission for substantially preventing vehicular rollback on an incline includes a shaft, a gear, a one-way clutch, and a pawl member. The gear is selectively connected for common rotation with the shaft. The gear is rotatable in a first rotary direction and a second rotary direction. The one-way clutch has an inner race and an outer race, where the inner race is connected to the gear and the outer race has an outer surface having a plurality of engaging teeth. The pawl member has a first end and a second end, where the first end is pivotly mounted to a transmission housing. The second end of the pawl has a first angled portion configured to releasably engage at least one of the plurality of engaging teeth of the outer race as the outer race rotates in the second rotary direction. | 01-05-2012 |
20120017716 | SYNCHRONIZER ACTUATION ASSEMBLY - A synchronizer actuation assembly for actuating at least one synchronizer member includes a barrel cam, at least one shift fork, a hydraulic piston assembly, and a motion converter. The barrel cam includes at least one cam groove that circumscribes the barrel cam and defines at least a neutral position and a first engaged position. The at least one shift fork has a first end portion disposed in the at least one cam groove and a second forked end portion. The hydraulic piston assembly includes a housing and a piston disposed in the housing. The motion converter includes a translatable input member engaged with the piston of the hydraulic piston assembly, a rotatable output member rotatably coupled with the barrel cam, and a direction selection mechanism. The translatable input member is selectively rotatably coupled with the rotatable output member in a first rotational direction or a second rotational direction. | 01-26-2012 |
20120090703 | POWERTRAIN PRESSURE AND FLOW CONTROL SYSTEM FOR AUTOMATIC TRANSMISSIONS - A pressure and flow control system includes a hydraulically-controlled component, a pilot valve, and a regulating valve. The pilot valve is configured to produce a pilot signal and includes a first valve, which is a MEMS microvalve. The regulating valve is in fluid communication with the pilot valve, and is configured to receive the pilot signal. The regulating valve is further configured to output a control signal, which controls the hydraulically-controlled component. | 04-19-2012 |
20120090944 | MICRO ELECTRO-MECHANICAL SYSTEM (MEMS) BASED HYDRAULIC CONTROL SYSTEM FOR AUTOMATED MANUAL TRANSMISSIONS - An automated manual transmission includes a hydraulic device, a pilot valve, and a regulating valve. The pilot valve is operably connected to the hydraulic device and configured to actuate. The pilot valve includes at least one micro-electro-mechanical systems (MEMS) based device. The regulating valve is operably connected to the pilot valve and the hydraulic device. The regulating valve is configured to direct fluid to the hydraulic device based on the actuation of the pilot valve. | 04-19-2012 |
20120137806 | METHOD OF CONTROLLING A DUAL CLUTCH TRANSMISSION - 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. | 06-07-2012 |
20120138406 | 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 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. | 06-07-2012 |
20120138408 | METHOD OF CONTROLLING A DUAL CLUTCH TRANSMISSION - 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. | 06-07-2012 |
20120144946 | METHOD OF CONTROLLING A HYDRAULIC CONTROL SYSTEM FOR A DUAL CLUTCH TRANSMISSION - A hydraulic control system for a dual clutch transmission includes a plurality of solenoids and valves 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 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. | 06-14-2012 |
20120145502 | ELECTRO-HYDRAULIC CONTROL SYSTEM AND METHOD FOR 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. | 06-14-2012 |
20120145503 | ELECTRO-HYDRAULIC CONTROL SYSTEM AND METHOD 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. | 06-14-2012 |
20120145504 | CONTROL SYSTEM AND METHOD 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. | 06-14-2012 |
20120193188 | ENGINE START STOP APPLICATIONS FOR SOLENOID PUMPS - A solenoid pump and associated hydraulic circuitry are intended for use in automatic transmissions capable of engine start stop (ESS) operation. In a first embodiment, a solenoid pump provides pressurized hydraulic fluid to respective inputs of two way check valves. The other inputs are provided with controlled hydraulic fluid from a transmission valve body. The outputs of the check valves are provided to those hydraulically operated torque transmitting devices associated with first gear. The solenoid pump is activated when the transmission is in gear and the engine is stopped to maintain hydraulic pressure in those actuators associated with first gear in order that a first gear vehicle launch may be quickly and smoothly achieved when the engine is restarted. A second, similar embodiment provides hydraulic fluid to actuators associated with reverse gear. A third embodiment includes a solenoid pump and a latching solenoid valve both communicating with a hydraulic supply between a variable output solenoid valve and a hydraulic actuator in an automatic transmission which maintains clutch pressure by compensating for leaks in the hydraulic components. In a fourth embodiment, a solenoid pump provides pressurized hydraulic fluid to the exhaust backfill circuits of one or more hydraulic operators in an automatic transmission. | 08-02-2012 |
20120196718 | COMPACT MULTI-SPEED AUTOMATIC TRANSMISSION - An automatic transmission includes an input shaft, an output shaft and four planetary gear assemblies each having a first, a second and a third element. The automatic transmission includes six fixed or rigid interconnections: one from a third element of the second planetary gear assembly to a second element of the fourth planetary gear assembly, one from a second element of the third planetary gear assembly to the second element of the fourth planetary gear assembly, one from a third element of the first planetary gear assembly to a second element of the second planetary gear assembly, one from a third element of the third planetary gear assembly to a first element of the fourth planetary gear assembly and one from an element of the second planetary gear assembly to an element of the first planetary gear assembly. The automatic transmission also includes four clutches and three brakes which may be selectively engaged to provide nine, ten or eleven speed transmission operation. | 08-02-2012 |
20130023376 | METHOD FOR CONTROLLING A MULTI-SPEED TRANSMISSION HAVING FOUR PLANETARY GEAR SETS FOR PRODUCING AT LEAST NINE GEAR SPEEDS - A transmission of the present invention has an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices include clutches and brakes. A method for controlling the transmission selectively engages the torque transmitting devices in combinations of at least two to establish at least nine forward speed ratios and at least one reverse speed ratio. | 01-24-2013 |
20130113407 | CONTROL SYSTEM WITH REMOTE DRIVERS - A control system for a transmission includes a transmission control module having a processor configured to determine an output torque command and having a pulse width modulation (PWM) switch configured to generate a PWM signal at least partially representative of the output torque command. A network is in communication with the transmission control module and is configured to receive and transmit the PWM signal. A driver is integrated with the electromagnetic actuator and is in communication with the network. The driver is configured to receive the PWM signal and convert the PWM signal into a drive current that enables the electromagnetic actuator to fulfill the output torque command. | 05-09-2013 |
20130139646 | LAYSHAFT AUTOMATIC TRANSMISSION - A transmission includes a housing, an input member connectable to an engine output member, a sleeve member, and a launch clutch assembly connected to the input member and to the sleeve member, wherein the launch clutch is selectively engageable to transmit torque from the input member to the sleeve member. A first countershaft is rotatably supported within the transmission housing. A second countershaft is rotatably supported within the transmission housing. A plurality of co-planar gear sets are connected to the input member, sleeve member, and the countershafts. A plurality of torque transmitting mechanisms are provided for coupling various components of the co-planar gear sets to the input member, sleeve member, and countershafts. The selective engagement of the launch clutch assembly and the torque transmitting mechanisms establishes at least one of five forward speed ratios and a reverse speed ratio. | 06-06-2013 |
20130160445 | SHAPE MEMORY ALLOY ACTUATOR - A device or actuator includes a first component made of Shape Memory Alloy (SMA) that applies force to a second component of the device to provide a controllable actuator. The SMA component is selectively energized by using active electric current through it. | 06-27-2013 |
20140123791 | SIX, SEVEN, AND EIGHT SPEED LAYSHAFT AUTOMATIC TRANSMISSION - A transmission includes a housing, an input member connectable to an engine output member, and a launch clutch assembly connected to the input member. A first and a second countershaft are rotatably supported within the transmission housing. A plurality of co-planar gear sets are connected to the input member and the first and second countershafts. A plurality of torque transmitting mechanisms are provided for coupling various components of the co-planar gear sets to the input member and countershafts. The selective engagement of the launch clutch assembly and the torque transmitting mechanisms establishes at least one of six forward speed ratios and a reverse speed ratio. | 05-08-2014 |