Patent application number | Description | Published |
20090098978 | Torque Converter Control Method And Apparatus - A method for controlling a torque converter having an internal lockup clutch includes detecting vehicle operating conditions and executing one of a stored plurality of torque converter clutch modes each corresponding to a different set of vehicle operating conditions. A fully-released mode corresponds to vehicle pre-launch, a partially-engaged mode corresponds to post-launch of the vehicle in first gear, downshift, coasting, throttle tip-in, or throttle tip-out; a first fully-engaged mode corresponds to steady-state operation in second gear or a higher; and a second fully-engaged mode corresponds to an upshift. Slippage across the converter is controlled only during the first fully-engaged mode. A vehicle is also provided having an engine, transmission, torque converter with lockup clutch, and controller having a control algorithm. The algorithm executes a different lockup clutch mode based on the detected vehicle operating conditions, and the slippage across the converter is controlled during only one lockup clutch mode. | 04-16-2009 |
20090149298 | Aggressive Torque Converter Clutch Slip Control Design through Driveline Torsional Velocity Measurements - A system and method for setting the slip of a torque converter for a plurality of selected engine speeds and transmission gears. The method includes populating a table off-line, typically using a dynamometer, with torque converter slips for a plurality of selected engine speeds and transmission gears. A speed sensor is used to measure vibrations transmitted through the torque converter to the driveline of the vehicle. The sensor signal is sent to an analyzing system where it is converted to the frequency domain. A separate minimum slip value for each selected engine speed and transmission gear is stored in a table so that during vehicle operation, a controller will instruct the torque converter clutch to set the desired converter slip for the current engine speed and transmission gear provided for a particular throttle position and/or engine torque. | 06-11-2009 |
20090150032 | EFFECTIVE DRIVELINE VIBRATION DETECTION ALGORITHM IN TRANSMISSION TCC SLIP CONTROL - A method for adjusting the slip of a torque converter for a plurality of selected engine speeds, transmission gears and engine torque. A sensor is used to determine vibrations transmitted through the torque converter to the driveline of the vehicle. The sensor signal is sent to a controller where it is converted to the frequency domain. If the amplitude of the frequency signal exceeds a threshold, then the algorithm increases/decreases the converter slip until the driveline vibrations equal a threshold. | 06-11-2009 |
20090192015 | Driver Intention Detection Algorithm for Transmission Control - A system and method for providing TCC control and/or transmission gear shift control by considering the rate of change of the accelerator pedal or throttle position. The method determines whether the rate of change of the throttle position exceeds a predetermined positive rate of change or a predetermined negative rate of change and, if so, releases the TCC to provide TCC control. Alternatively, or additionally, the method can provide a transmission gear down-shift or up-shift depending on which direction the throttle position is changing. Once the TCC and/or gear shift control has been initiated, the method can start a timer and then return to normal TCC and/or gear shift control after the timer has expired. The TCC and/or gear shift control can also return to normal if the rate of change of the throttle position indicates that the throttle is being returned to its previous position. | 07-30-2009 |
20090192017 | WHEEL SLIPPAGE DETECTION FOR DRIVETRAIN CONTROL - A method for preventing a torque converter clutch that controls the slip in a torque converter between a vehicle engine and transmission from locking up in response to wheel slip from one or more of the vehicle wheels. The method includes monitoring the vehicle speed and/or the transmission output speed, and converting the speed to an acceleration. An average of the acceleration is provided over a predetermined number of sample points. The method then determines whether the current acceleration exceeds the average acceleration by a predetermined amount. If the current acceleration does exceed the average acceleration, then the method causes the converter slip to be held at its current value so that the torque converter does not lock up. Additionally, the method prevents the transmission from changing gears. The method then monitors whether the acceleration has fallen below a predetermined value or a predetermined period of time has expired. | 07-30-2009 |
20090194381 | METHOD AND APPARATUS FOR CONTROLLING A SELECTABLE ONE-WAY CLUTCH IN AN ELECTRO-MECHANICAL TRANSMISSION - A selectable one-way clutch includes a strut plate co-annular to a slide plate and a notch plate. The selectable one-way clutch is configured to transfer torque between a strut plate and a notch plate in a first direction when a displacement actuator moves a pin and a slide plate to a first position. The selectable one-way clutch is configured to disengage the strut plate from the notch plate when the displacement actuator moves the pin and the slide plate to the second position. | 08-06-2009 |
20090205918 | Rotary-Type Selectable One-Way Clutch - A transmission includes a selectable one-way clutch (SOWC) assembly. The SOWC assembly includes a rotatable pocket plate, a rotatable slide plate, and an annular piston having a ramped surface feature. The piston, which can be hydraulically actuated, moves axially toward the pocket plate when applied, and axially away from the pocket plate when released, to thereby select between two torque holding or operating modes of the SOWC assembly. The ramped surface feature of the piston engages an axial knob portion of the slide plate when the piston is applied to select to one operating mode, thus rotating the slide plate in one direction. A return spring moves the piston away from the pocket plate when the other operating mode is selected, and the slide plate is rotated via a spring in another direction. A guide pin maintains a relative position of the piston and the slide plate. | 08-20-2009 |
20100018795 | Compact Selection Mechanism For a Selectable One-Way Clutch - A vehicle includes an automatic transmission having an engine, an input member, a stationary center support, and a selectable one-way clutch (SOWC) positioned within the stationary center support. A SOWC selection mechanism is formed integrally with the center support, and rotates a slide plate during a predetermined transmission operating mode. A piston in a first bore of the selection mechanism rotates the slide plate in a first rotational direction to engage the SOWC, and a return spring in a second bore of the selection mechanism rotates the SOWC in a second direction to disengage the SOWC. The slide plate has a tab portion, and the piston and the return spring alternately apply a respective first and second force to opposite sides of the tab portion to rotate the slide plate, either directly or via an adapter ring. | 01-28-2010 |
20100018833 | System and Method for Controlling a Clutch Fill Event - A method optimizes a fill event of an apply chamber of a fluid-actuated clutch, and includes determining input values describing the fill event, and then estimating a fill time using the input values. The method includes filling the apply chamber using the estimated fill time (EFT) or within an allowable range of the EFT. The input values can include a command line pressure, command fill stroke pressure, and an estimated viscosity of the fluid, although other values can be used. The input values are processed through a neural network having an input layer, an optional hidden layer, and an output layer. An assembly includes a fluid-actuated clutch having an apply chamber and a controller operable for estimating the fill time required for filling the apply chamber, and for controlling the fill of the apply chamber within the EFT. | 01-28-2010 |
20100022342 | Front Wheel Drive Automatic Transmission with a Selectable One-Way Clutch - A vehicle includes a front-wheel drive (FWD) transmission having a case, a selectable one-way clutch (SOWC) indexed to the case, pressurized fluid, and a valve body assembly (VBA). The VBA has a piston in communication with the fluid, a return spring, and an actuator plate in continuous contact with or connected to each of the piston and a shift lever of the SOWC. Fluid moving the piston and plate in one direction locks the SOWC to enable a reverse mode, and the spring moves the piston and the plate in another direction to unlock the SOWC in a forward mode. A method prevents spin losses in the FWD transmission by positioning a two-mode SOWC within a case, positioning a VBA adjacently and externally to the case, and admitting pressurized fluid into the VBA to engage the SOWC only during a reverse operating mode. | 01-28-2010 |
20100022343 | Rear Wheel Drive Automatic Transmission with a Selectable One-Way Clutch - A vehicle includes a rear-wheel drive (RWD) automatic transmission having a stationary member, a two-mode selectable one-way clutch (SOWC), pressurized fluid, and a valve body assembly (VBA). The VBA has a piston, a return spring, and an actuator linkage in contact with the piston and a shift lever of the SOWC. Fluid moves the piston and linkage in one direction to lock the SOWC and enable a reverse mode having no spin losses, and the spring moves the piston and linkage in another direction to unlock the SOWC in a forward mode. A method reduces spin losses by admitting fluid into the VBA to move the piston in one direction to thereby rotate the shift lever of the SOWC to one angular position to lock a driving member of the transmission to the stationary member during reverse, engine braking first gear, and manual low speeds. | 01-28-2010 |
20100030437 | METHOD FOR ADAPTING SHIFT SCHEDULE OF AN AUTOMATIC TRANSMISSION BASED ON GPS/MAP INFORMATION - A powertrain control includes monitoring map preview information, determining a road gradient factor based upon the map preview information, and adapting a transmission shift schedule based upon the road gradient factor. | 02-04-2010 |
20100063693 | ENGAGEMENT OF SELECTABLE ONE-WAY CLUTCH OR MECHANICAL DIODE BY ACTIVE ENGINE SPEED CONTROL - A method for controlling a powertrain includes monitoring a transmission output speed, monitoring an engine output speed, and monitoring an engine braking request. When the engine braking request is present, a target engine output speed is determined based upon the transmission output speed. Speed of the engine is commanded to the target engine output speed. When the engine braking request is present, a selectable one-way clutch slip speed is determined based upon the transmission output speed and the engine output speed. The selectable one-way clutch slip speed is utilized to further command the speed of the engine to create a zero selectable one-way clutch slip speed. And when the selectable one-way clutch slip speed equals zero, the selectable one-way clutch is engaged. | 03-11-2010 |
20100063694 | ENGINE POWER MANAGEMENT FOR A SELECTABLE ONE-WAY CLUTCH OR MECHANICAL DIODE IN AUTOMATIC TRANSMISSIONS - A method for controlling a powertrain includes monitoring engagement status of said selectable one-way clutch, monitoring an upshift command, monitoring a speed of an engine to torque converter shaft, monitoring a speed of a torque converter to transmission shaft, when the monitoring detects engagement of the selectable one-way clutch and the upshift command, then determining a relative rotational speed of the torque converter based upon the speed of said engine to torque converter shaft and the speed of said torque converter to transmission shaft. A locked selectable one-way clutch condition is diagnosed based upon the relative rotational speed. A torque increase is commanded from the engine based upon the locked selectable one-way clutch condition. And disengagement of the selectable one-way clutch is commanded. | 03-11-2010 |
20100063698 | CONTROL OF SELECTABLE ONE-WAY CLUTCH IN A TRANSMISSION - A powertrain in a vehicle includes an electro-mechanical transmission having a selectable one-way clutch mechanically-operatively coupled to an internal combustion engine and configured to selectively transmit mechanical power to an output member. A control method includes monitoring a vehicle speed, monitoring a transmission gear state, comparing the vehicle speed to a threshold low speed range, transitioning a selectable one-way clutch into an engaged mode when said vehicle speed is not in a forward direction in excess of the threshold low speed range, and maintaining the selectable one-way clutch in the engaged mode based upon the transmission gear state remaining in a first gear state and the vehicle speed remaining within said threshold low speed range, a neutral state, or a reverse state. | 03-11-2010 |
20100140041 | ROTARY-TYPE SELECTABLE ONE-WAY CLUTCH - A selectable one-way clutch (SOWC) assembly uses hydraulic-actuation to select operating modes within a rotating housing. Two races of the SOWC assembly can rotate at disparate speeds, i.e., one race is not grounded prior to actuation. The SOWC assembly has a pair of races keyed to different housings and hubs. The housing and hub can be attached to different elements of a gear train, for example, which can be rotating during the various gear states. A hydraulic actuator or multiple actuators can be keyed to the housing, with axial motion of the actuator or actuators selecting a state or operating mode of the SOWC assembly. The actuator has axially-extending tabs that engage radially-extending fingers of the selector plate, thus rotating the selector plate in different directions when applied or released. Multiple actuators can be used in conjunction with multiple selector plates to provide additional SOWC operating modes. | 06-10-2010 |
20100234159 | HYBRID TRANSMISSION WITH INTEGRATED TORQUE MACHINE - A hybrid transmission device for a hybrid powertrain system having an integrated torque machine to transfer power among an input member, the torque machine and an output member in one of a plurality of fixed gear and continuously variable states is operative in a plurality of fixed gear states, a continuously variable state, and a torque machine state. | 09-16-2010 |
20100234166 | MULTI-SPEED TRANSMISSION WITH SELECTABLE ONE-WAY BRAKING CLUTCH - A multi-speed transmission for a vehicle is provided with a selectable one-way braking clutch (SOWBC). The transmission has one or more planetary gear sets, and a set of intermeshing gears, which may be a planetary gear set. Multiple torque-transmitting mechanisms are engagable in different combinations to establish at least one reverse speed ratio and multiple forward speed ratios between an input member and an output member. A selectable one-way braking clutch is configured to brake in one rotational direction and is selectively reversible to brake in an opposite rotational direction, and freewheels in some speed ratios. | 09-16-2010 |
20100234167 | MULTI-SPEED TRANSMISSION WITH SELECTABLE ONE-WAY BRAKING CLUTCH - A multi-speed transmission for a vehicle is provided with a selectable one-way braking clutch (SOWBC). The transmission has an input member connected for common rotation with one of the members of four planetary gear sets and an output member connected for common rotation with another of the members of the planetary gear sets. Four interconnecting members connect different members of the planetary gear sets for common rotation. A first brake is selectively engagable to ground the first member of the first planetary gear set to the stationary member. A first, a second, and a third rotating clutch are each selectively engagable to connect a different respective pair of the members of the planetary gear sets for common rotation. A selectable one-way braking clutch is configured to brake in one rotational direction and is selectively reversible to brake in an opposite rotational direction, and freewheels in some speed ratios. | 09-16-2010 |
20100263978 | TORQUE TRANSMITTING DEVICE - A torque transmitting device includes a plurality of clutch plates, a ramp member that is selectively rotatable about an axis and that defines a ramp surface, a worm gear that is operatively connected to the ramp member for rotation therewith about the axis, and a roller element contacting the ramp surface. The ramp surface is configured such that, when the ramp member is rotated about the axis, the roller element exerts a reaction force on the ramp surface that urges the ramp member to move in a first axial direction and thereby transmit the reaction force to the clutch plates | 10-21-2010 |
20110060509 | DESIRED TORQUE CONVERTER CLUTCH SLIP FEEDBACK RECOVERY ALGORITHM FOR TIP-IN MANEUVERS - A powertrain includes an engine, a transmission, and a torque converter located between the engine and the transmission. Subsequent to a rapid increase in engine torque commands, torque converter slip is controlled by monitoring a measured torque converter slip after the rapid increase in engine torque commands, determining a maximum measured torque converter slip value resulting from the rapid increase in engine torque commands based upon the measured torque converter slip, determining a target value to which to reduce the torque converter slip, determining a recovery profile to reduce the torque converter slip from the maximum measured torque converter slip to the target value, and utilizing the recovery profile to controllably reduce the torque controller slip. Determining the recovery profile includes commanding reducing slip through the profile at commanded torque converter slip values selected to prevent the torque converter slip from reaching zero. | 03-10-2011 |
20110136607 | SYNCHRONIZER IN ELECTRO-MECHANICAL TRANSMISSION - An electro-mechanical transmission includes a plurality of transmission components and at least one synchronizer configured to selectively engage and disengage at least two of the transmission components to effect operation in a speed range in the transmission. The synchronizer further includes a plurality of input components associated with one of the transmission components and a plurality of output components including a clutching mechanism configured to engage to at least one of the input components when the synchronizer is activated and disengage from the input component when the synchronizer is deactivated. | 06-09-2011 |
20110160020 | METHOD AND APPARATUS FOR CONTROLLING A TORQUE CONVERTER CLUTCH - A method for controlling torque transmitted between an internal combustion engine and a torque transmission device includes controlling actuation of a torque converter clutch device effective to maintain an engine output within a predetermined range when an input to the transmission is less than a threshold, and controlling actuation of the torque converter clutch device effective to maintain a relative speed across the torque converter substantially at a predetermined magnitude when the input to the transmission is greater than the threshold. | 06-30-2011 |
20110166757 | CLOSED-LOOP FEEDBACK CONTROL AND REDUCTION OF THE TORQUE CONVERTER CLUTCH SLIP FOR ENHANCED DRIVABILITY FOR HEAVY TIP-IN MANEUVERS - A method for responding to a rapid change in engine torque includes monitoring a change in engine torque and determining a rapid change in engine torque when the change in engine torque exceeds a threshold change in engine torque. Subsequent to determining a rapid change in engine torque, an increase in the torque converter slip is provided by reducing the torque converter clutch pressure command by a selected value and thereafter the feedback control is deactivated for a predetermined duration. Subsequent to the predetermined duration, the feedback control is reactivated to decrease the torque converter slip toward a desired torque converter slip value. | 07-07-2011 |
20110166758 | STOCHASTIC DETECTION OF TORQUE CONVERTER SLIP SPEED AND RELATED CONTROL - A method for controlling torque converter slip includes operating the torque converter in a controlled slip mode, monitoring slip in the torque converter, statistically analyzing the monitored slip to determine a likely condition of the torque converter, and utilizing the likely condition of the torque converter to control the torque converter slip. | 07-07-2011 |
20110190995 | CLUTCH SLIP RECOVERY SYSTEM AND METHOD - A system and method for transferring torque from a prime mover to a transmission includes a coupling device, a hydraulic control system and a control module. The coupling device includes a torque converter clutch (TCC), where the coupling device is located between an output of the prime mover and an input of the transmission. The TCC is actuated between a fully engaged position, a slip mode where slip occurs, and a fully disengaged position. The hydraulic control system includes a controller device that communicates an actuation pressure to the TCC. The actuation pressure actuates the TCC between the fully engaged position, the slip mode, and the fully disengaged position. The controller is in communication with the TCC, the output of the prime mover, the input of the transmission, and the controller device of the hydraulic control system. The controller regulates the actuation pressure. | 08-04-2011 |
20110245035 | DUAL-PISTON NORMALLY-ENGAGED CLUTCH - A normally-engaged clutch is provided having a friction-element with a first side and an opposing second side, a first plate configured for pressing against the friction-element on the first side, and a second plate configured for pressing against the friction-element on the second side. The clutch also includes a biasing device configured to apply a first force to the second plate for pressing the second plate against the friction-element to engage the clutch. Additionally, the clutch includes an apply piston for applying a second force to the first plate, and a release piston for applying a third force to the second plate. The clutch is disengaged when the second plate is pushed away from the friction-element by the third force in the absence of the second force, and is engaged when the first plate is pressed against the friction-element by the second force. | 10-06-2011 |
20120035819 | REAL TIME ESTIMATION ALGORITHM FOR TORQUE CONVERTER CLUTCH FEED FORWARD PRESSURE FOR ECCC CONTROL - A powertrain includes a torque generative device and a torque converter having an impeller, a turbine and a torque converter clutch. A method to control torque converter slip includes monitoring a reference slip and a turbine speed of the torque converter, determining a turbine torque based upon the reference slip and the turbine speed, determining a feed forward torque converter clutch pressure command based upon the turbine torque, a torque generative device torque, and a TCC gain, and controlling the torque converter clutch based upon the feed forward torque converter clutch pressure command. | 02-09-2012 |
20120071291 | MULTI-SPEED TRANSMISSION HAVING AUTOMATIC AND MANUAL MODES - A transmission is disclosed having an input member, an output member, and first, second, third and fourth planetary gear sets each having first, second and third members. A plurality of interconnecting members continuously interconnect one of the first, second and third members of one of the planetary gear sets with one of the first, second and third members of another of the planetary gear sets. Five torque-transmitting mechanisms are selectively engageable in combinations of at least three to establish at least eight forward speed ratios and at least one reverse speed ratio between the input member and the output member. The first of the five torque-transmitting mechanisms is a selectable one-way clutch engageable to interconnect the third member of the first planetary gear set with the stationary member. | 03-22-2012 |
20120071292 | MULTI-SPEED TRANSMISSION HAVING AUTOMATIC AND MANUAL MODES - A transmission is provided having a stationary member, an input member, an output member, four planetary gear sets, a plurality of coupling members and five torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The five torque transmitting mechanisms are selectively engageable to interconnect one of the first, second, and third members with another of the first, second, third members, and a stationary element. The torque transmitting mechanisms are selectively engageable in combinations of at least three to establish at least eight forward speed ratios and at least one reverse speed ratio between the input member and the output member. A first of the five torque-transmitting mechanisms is a selectable one-way clutch engageable to interconnect the third member of the fourth planetary gear set with the stationary member. | 03-22-2012 |
20120078476 | METHOD TO DETERMINE TORQUE - A powertrain includes a transmission coupled to a driveline. A method for monitoring torque in the powertrain includes monitoring signal outputs from a first rotational sensor and a second rotational sensor configured to monitor respective rotational positions of first and second locations of a driveline, determining a positional relationship between the first and second locations using positional identifiers of the first and second rotational sensors, deriving a twist angle from the positional relationship between the first and second rotational sensors, calculating a magnitude of driveline torque corresponding to the twist angle, and controlling the vehicular powertrain according to the calculated magnitude of driveline torque. | 03-29-2012 |
20120090416 | MICRO-ELECTRO-MECHANICAL-SYSTEMS BASED HYDRAULIC CONTROL SYSTEM FOR A WET DUAL CLUTCH TRANSMISSION - A wet dual clutch transmission includes at least one hydraulic component and a pilot valve operably connected to the hydraulic component to actuate the hydraulic component. The pilot valve includes a Micro-Electro-Mechanical Systems (MEMS) based pressure differential actuator valve. The hydraulic component may include but is not limited to a first clutch and a second clutch of the wet dual clutch transmission, a lube regulator valve, an on/off solenoid, a synchronizing shift fork or a line pressure control valve. | 04-19-2012 |
20120090426 | MICRO ELECTRO-MECHANICAL SYSTEM (MEMS) BASED HYDRAULIC CONTROL SYSTEM FOR FULL HYBRID VEHICLES - A powertrain system in a hybrid vehicle includes a hydraulic device, a pilot valve, and a regulator 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 regulator valve is operably connected to the pilot valve and the hydraulic device. The regulator valve is configured to direct fluid to the hydraulic device based on the actuation of the pilot valve. | 04-19-2012 |
20120090427 | MICRO-ELECTRO-MECHANICAL-SYSTEM (MEMS) BASED HYDRAULIC CONTROL SYSTEM FOR MILD HYBRID VEHICLES - A powertrain system in a mild hybrid vehicle includes a hydraulic device, a pilot valve, and a regulator 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 regulator valve is operably connected to the pilot valve and the hydraulic device. The regulator valve is configured to direct fluid to the hydraulic device based on the actuation of the pilot valve. | 04-19-2012 |
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 |
20120090935 | MICRO-ELECTRO-MECHANICAL-SYSTEMS BASED HYDRAULIC CONTROL FOR A POWERTRAIN - An automatic transmission for a vehicle includes a hydraulically-controlled component and a pilot valve. The pilot valve includes at least one micro-electrical-mechanical-systems (MEMS) based device. The pilot valve is operably connected to and is configured for actuating the hydraulically-controlled component. The pilot valve additionally includes a regulating valve operably connected to the pilot valve and to the hydraulically-controlled component. The regulating valve is configured to direct fluid to the hydraulically-controlled component when actuated by the pilot valve. | 04-19-2012 |
20120090937 | MICRO-ELECTRO-MECHANICAL-SYSTEMS BASED HYDRAULIC CONTROL FOR A POWERTRAIN - A continuously variable transmission (CVT) for a vehicle includes a hydraulically-controlled component and a pilot valve. The pilot valve includes at least one micro-electrical-mechanical-systems (MEMS) based device. The pilot valve is operably connected to and is configured for actuating the hydraulically-controlled component. The pilot valve additionally includes a regulating valve operably connected to the pilot valve and to the hydraulically-controlled component. The regulating valve is configured to direct fluid to the hydraulically-controlled component when actuated by the pilot valve. | 04-19-2012 |
20120090940 | MICRO-ELECTRO-MECHANICAL-SYSTEMS BASED HYDRAULIC CONTROL SYSTEM FOR A DRY DUAL CLUTCH TRANSMISSION - A dry dual clutch transmission includes at least one hydraulic component and a pilot valve operably connected to the hydraulic component to actuate the hydraulic component. The pilot valve includes a Micro-Electro-Mechanical Systems (MEMS) based pressure differential actuator valve. The hydraulic component may include but is not limited to a first clutch and a second clutch of the dry dual clutch transmission, an on/off solenoid, a line pressure control valve or a synchronizing shift fork. | 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 |
20120090945 | POWERTRAIN PRESSURE AND FLOW CONTROL SYSTEM FOR DOG CLUTCHES - A pressure and flow control system for a dog clutch includes a pilot valve, a regulating valve, and a selector. 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. The selector is configured to engage and disengage the dog clutch in response to the control signal. | 04-19-2012 |
20120090946 | POWERTRAIN PRESSURE CONTROL SYSTEM - A pressure 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 |
20120090947 | POWERTRAIN PRESSURE AND FLOW CONTROL SYSTEM FOR A TORQUE CONVERTER CLUTCH - A pressure and flow control system for a torque converter clutch includes a pilot valve, a regulating valve, and a torque converter control 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. The torque converter control valve is configured to engage and disengage the torque converter clutch in response to the control signal. | 04-19-2012 |
20120090952 | POWERTRAIN PRESSURE CONTROL SYSTEM - A pressure control system configured to control a selectable one-way clutch (SOWC) includes a pilot valve and a SOWC actuator. The pilot valve is configured to produce a pilot signal and includes a first valve, which is a MEMS microvalve. The pressure control system may further include a regulating valve in fluid communication with the pilot valve and configured to receive the pilot signal. The regulating valve is further configured to output a control signal. The SOWC actuator is configured to select between operating modes of the selectable one-way clutch in response to one of the pilot signal and the control signal. | 04-19-2012 |
20120100947 | METHOD AND APPARATUS EFFECTING TORQUE TRANSFER THROUGH A TRANSMISSION DURING ENGINE AUTOSTOP AND AUTOSTART EVENTS - A powertrain system includes an engine coupled via an input member to a transmission to transfer torque to an output member. The engine is configured to execute an autostop event and an autostart event during ongoing powertrain operation. The transmission includes a plurality of planetary gear sets and a plurality of torque transfer clutches. The plurality of torque transfer clutches includes hydraulically-activated clutches and mechanical clutch devices, including an electromechanically-activated selectable one-way clutch. The transmission is configured to provide hydraulic pressure to activate the hydraulically-activated clutches using only a mechanically driven hydraulic pump. The transmission is configured to effect torque transfer among the input member, the plurality of planetary gear sets and the output member in one of a plurality of fixed gear states by selectively activating at least one of the plurality of torque transfer clutches. | 04-26-2012 |
20120136518 | SELECTABLE ONE-WAY CLUTCH OPERATION IN A HYBRID POWERTRAIN - A hybrid powertrain includes a plurality of torque generative devices, a transmission input shaft, and a planetary gear set connecting the torque generative devices to the transmission input shaft. A method to control the powertrain includes monitoring a desired configuration of the powertrain and selectively grounding a gear of the planetary gear set with a selectable one way clutch based upon the desired configuration of the powertrain. | 05-31-2012 |
20120138411 | METHOD OF OPERATION OF A SELECTABLE ONE WAY CLUTCH SELECTION MECHANISM - Apparatus for controlling a selectable one-way clutch (SOWC) in an automatic transmission includes a ring-shaped control housing located substantially concentrically to the SOWC, and an actuation mechanism included within the ring-shaped control housing and effective to actuate a selector plate engaged with the SOWC from a default position to an actuation position. The selector plate is located between the ring-shaped control housing and the SOWC. A hydraulic fluid delivery system hydraulically communicates with the actuation mechanism to control the actuation of the actuation mechanism. | 06-07-2012 |
20120142472 | HYBRID POWERTRAIN SYSTEM USING SELECTABLE ONE-WAY CLUTCHES - A hybrid powertrain system includes an input member, first and second torque machines, a differential gear set including first, second and third elements, an output member, and first, second, and third selectable one-way clutches (SOWC), each operative in one of a respective deactivated state and a respective plurality of activated states. The second torque machine is rotatably coupled to the first element of the differential gear set, and the output member is rotatably coupled to the second element of the differential gear set. The first SOWC is configurable to prevent rotation of the third element of the differential gear set in a first rotational direction when controlled to a first one of the respective plurality of activated states, and configurable to prevent rotation of the third element of the differential gear set in a second rotational direction opposite the first rotational direction when controlled to a second one of the respective plurality of activated states. The first torque machine is coupled to the third element of the differential gear set only when the second SOWC is controlled to one of the respective plurality of activated states. And, the third element of the differential gear set coupled to the input member only when the second and third SOWCs are each controlled to one of the respective plurality of activated states. | 06-07-2012 |
20120145506 | THREE MODE SELECTION MECHANISM FOR A SELECTABLE ONE WAY CLUTCH ASSEMBLY - A mode selector mechanism for a selectable one way clutch assembly includes a lever moveable between a first position, a second position and a third position. A lever biasing device biases the lever in a first direction. A piston acts in opposition against the lever biasing device to move the lever in a second direction opposite the first direction. The piston is actuated by a variable hydraulic signal. The lever is disposed in the second position when the variable hydraulic signal includes a fluid pressure between a first fluid pressure and a second fluid pressure. The lever is disposed in the third position when the variable hydraulic signal includes a fluid pressure greater than the second fluid pressure. The lever is disposed in the first position when the variable hydraulic signal includes a fluid pressure less than the first fluid pressure. | 06-14-2012 |
20120152678 | TORQUE CONVERTER WITH LOCK-UP CLUTCH - A torque converter for an automatic transmission includes a first fluid flow path for supplying a fluid to a pump cavity, a second fluid flow path for removing the fluid from the pump cavity, and a third fluid flow path for supplying a hydraulic signal to a lock-up clutch. The third fluid flow path is separate and distinct from the first fluid flow path and the second fluid flow path. A sleeve divides a stepped axial bore in the turbine output shaft into an inner stepped axial bore cavity, which is part of the third fluid flow path, and an outer stepped axial bore cavity, which is part of the first fluid flow path. The torque converter further includes an isolator assembly having a twenty degree rotational travel dampening distance. | 06-21-2012 |
20120152688 | AUTOMATIC TRANSMISSION SHIFT QUALITY VIA SELECTIVE USE OF CLOSED-LOOP PRESSURE FEEDBACK CONTROL - A method to control a hydraulically actuated clutch in a transmission of a vehicle includes monitoring a pressure in a hydraulic circuit providing pressurized fluid to the hydraulically actuated clutch with micro-electromechanical pressure sensor, providing a closed-loop feedback control command for a hydraulic control device providing the pressurized fluid to the hydraulic circuit based upon the monitoring pressure, and controlling the control device based upon the closed-loop feedback control command. | 06-21-2012 |
20120165146 | TRANSMISSION WITH SELECTABLE ONE-WAY CLUTCH AND DUAL-PISTON CLUTCH - A powertrain for a vehicle includes an engine, a transmission with an input member driven by the engine, and an output member. An electric motor is operable to drive the input member. The transmission has an electrically-actuated one-way clutch with a neutral mode in which the clutch freewheels in both directions of rotation, and a locked mode in which the clutch is locked in one direction of rotation. The transmission also has a hydraulically-actuated dual-piston clutch with a spring that biases the dual-piston clutch to an engaged state. The one-way clutch is in the neutral mode and the spring biases the dual-piston clutch to the engaged state prior to a key start of the engine. The one-way clutch is actuated to the locked state following ignition of the engine after a key start, and remains in the locked state during an autostop of the engine. | 06-28-2012 |
20120190496 | MULTI-SPEED TRANSMISSION WITH SELECTABLE ONE-WAY BRAKING CLUTCH - A multi-speed transmission for a vehicle is provided with a selectable one-way braking clutch (SOWBC). The transmission has multiple planetary gear sets. Multiple torque-transmitting mechanisms are engagable in different combinations to establish at least one reverse speed ratio and multiple forward speed ratios between an input member and an output member. A selectable one-way braking clutch is configured to brake in one rotational direction and is selectively reversible to brake in an opposite rotational direction, and freewheels in some speed ratios. | 07-26-2012 |
20120202635 | INTEGRATED SINGLE MOTOR HYBRID TRANSMISSION USING REAR-WHEEL-DRIVE 8-SPEED TRANSMISSION - An apparatus transmitting torque among a first torque generative device, a second torque generative device and an output member includes a first planetary gear set including respective first, second and third members, a second planetary gear set including respective first, second and third members, the respective first member of the second planetary gear set mechanically coupled to the respective first member of the first planetary gear set. The first torque generative device is mechanically coupled to the respective second member of the first planetary gear set. The second torque generative device is mechanically coupled to the respective second member of the second planetary gear set, wherein the second torque generative device includes a grounding state wherein rotation of the respective second member of the second planetary gear set is prevented and a rotational state wherein rotation of the respective second member of the second planetary gear set is not prevented. | 08-09-2012 |
20120203403 | USE OF SELECTABLE ONE-WAY CLUTCH IN HYBRID POWERTRAIN - A powertrain includes a plurality of torque generative devices and a transmission having an output shaft, a plurality of planetary gear sets connecting the torque generative devices to the output shaft, and a selectable one-way clutch connected to a first of the planetary gear sets. A method to control the powertrain includes monitoring a desired transmission setting selection comprising one of a low range continuously variable gear mode, a high range continuously variable gear mode, and a fixed gear mode, determining a desired state for the selectable one-way clutch based upon the desired transmission setting selection, and actuating the selectable one-way clutch to effect the desired state for the selectable one-way clutch. | 08-09-2012 |
20120231913 | METHOD AND APPARATUS FOR CONTROLLING A SELECTABLE ONE-WAY CLUTCH IN AN ELECTRO-MECHANICAL TRANSMISSION - A transmission is configured to transfer power between an input member, first and second torque machines and an output member and includes a transmission case, a differential gear set, first and second torque transfer clutches, a first torque machine rotatably operatively couplable to a first element of the differential gear set when the second torque transfer clutch is in an applied state, and a second torque machine rotatably operatively coupled to a second element of the differential gear set. The differential gear set is configured to transfer torque between the first torque machine and the output member in a first continuously variable mode when the first torque transfer clutch is in the applied state, and to transfer torque between the first and second torque machines and the output member in a second continuously variable mode when the second torque transfer clutch is in the applied state. | 09-13-2012 |
20120295756 | MULTI-SPEED TRANSMISSION WITH AT LEAST ONE SELECTABLE ONE-WAY CLUTCH - A transmission has four planetary gear sets, four interconnecting members and six torque-transmitting mechanisms selectively engageable in different combinations of three to establish at least eight forward speed ratios. A first of the six torque-transmitting mechanisms is selectively engageable to connect the second member of the first planetary gear set to the stationary member. A second of the six torque-transmitting mechanisms is selectively engageable to connect the input member for common rotation with the second member of the third planetary gear set. At least one of the first and the second of the six torque-transmitting mechanisms is a selectable one-way clutch configured to have a first operating mode and a second operating mode, either of which modes may be selected. | 11-22-2012 |
20120296536 | ENGINE SPEED ASSIST TORQUE CONVERTER CLUTCH CONTROL - A method for controlling actuation of a torque converter clutch includes monitoring a transmission input speed, comparing the monitored transmission input speed to a threshold input speed, and, when the transmission input speed is less than the threshold input speed, controlling an engine speed based upon a desired minimum engine speed. Controlling the engine speed based upon the desired minimum engine speed includes monitoring a minimum engine speed critical parameter, determining the desired minimum engine speed based upon the minimum engine speed critical parameter, comparing the engine speed to the desired minimum engine speed, and controlling actuation of the clutch device based upon a result of the comparing the engine speed to the desired minimum engine speed. | 11-22-2012 |
20140299441 | DRY DUAL CLUTCH TRANSMISSION ACTUATION SYSTEM USING ELECTRICAL MOTOR WITH FORCE AIDED LEVER - An actuation system for actuating a clutch piston of a transmission includes an actuator and a lever. A first end of the lever is attached to the actuator. The lever is pivotable about a lever connection location. Movement of the actuator rotates the lever about the lever connection location. A spring assembly is pivotable about a spring connection location, and pivotably connected to the lever at a second end of the lever. When the actuator is disposed in an un-actuated position, the spring assembly is positioned such that a pre-loaded spring force is directed along a zero moment path to generate a zero moment in the lever. When the actuator is disposed in an actuated position, the spring assembly is rotated so that the spring force is directed along a moment generating path in order to generate a moment in the lever to rotate the lever. | 10-09-2014 |
20150083508 | MULTI-FUNCTIONAL ELECTRIC MODULE FOR A VEHICLE - A multi-functional electric module (eModule) is provided for a vehicle having a chassis, a master controller, and a drive wheel having a propulsion-braking module. The eModule includes a steering control assembly, mounting bracket, propulsion control assembly, brake controller, housing, and control arm. The steering control assembly includes a steering motor controlled by steering controllers in response to control signals from the master controller. A mounting feature of the bracket connects to the chassis. The propulsion control assembly and brake controller are in communication with the propulsion-braking module. The control arm connects to the lower portion and contains elements of a suspension system, with the control arm being connectable to the drive wheel via a wheel input/output block. The controllers are responsive to the master controller to control a respective steering, propulsion, and braking function. The steering motor may have a dual-wound stator with windings controlled via the respective steering controllers. | 03-26-2015 |
20150083509 | MODULAR ROBOTIC VEHICLE - A modular robotic vehicle includes a chassis, driver input devices, an energy storage system (ESS), a power electronics module (PEM), modular electronic assemblies (eModules) connected to the ESS via the PEM, one or more master controllers, and various embedded controllers. Each eModule includes a drive wheel containing a propulsion-braking module, and a housing containing propulsion and braking control assemblies with respective embedded propulsion and brake controllers, and a mounting bracket covering a steering control assembly with embedded steering controllers. The master controller, which is in communication with each eModule and with the driver input devices, communicates with and independently controls each eModule, by-wire, via the embedded controllers to establish a desired operating mode. Modes may include a two-wheel, four-wheel, diamond, and omni-directional steering modes as well as a park mode. A bumper may enable docking with another vehicle, with shared control over the eModules of the vehicles. | 03-26-2015 |