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Machine Element Or Mechanism > Control Lever And Linkage Systems > Multiple Controlled Elements > Transmission Control > Fluid Actuator

Fluid Actuator

Fluid Actuator patent applications listed include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.

08/14/14 - 20140224054 - Transmission gearshift control
A method for controlling cylinder pressure producing piston displacement for actuating a control element of an automatic transmission during a gearshift, includes (a) applying boost pressure to the to the control valve controlling the piston, provided one of the following conditions is present a boost phase is unexpired, cylinder pressure...

07/31/14 - 20140208882 - Gearbox for a motor vehicle
the second hydraulic pump is driven in rotation by an engine of said motor vehicle and is configured for supplying hydraulic fluid taken in from a second intake environment to said gearbox, for lubrication thereof, and to said first intake environment....

07/17/14 - 20140196559 - Electronic transmission control system
Embodiments of the present invention are directed to providing a transmission control system that enables an operator to quickly and effortlessly shift or change gears/selections/modes, in either a sequential or non-sequential manner without incurring the undesired unloading of driveline motion, while retaining consistent launches/start offs. More particularly, an improved transmission...

06/26/14 - 20140174234 - Bicycle control device
A bicycle control device includes a housing member, a shift-operating mechanism, a hydraulic fluid pressure generator and a control lever member. The housing member has an attachment part for attachment to a handlebar, and a grip part extending longitudinally between first and second ends of the grip part. The shift-operating...

05/08/14 - 20140123799 - Valve integrated park inhibit solenoid assembly
A system for locking a Park device in a transmission in an out-of-Park mode of operation includes a valve body that defines a bore, a solenoid connected to the valve body, a lock feature disposed in the valve body and interconnected with the solenoid, and a servo piston disposed within...

05/01/14 - 20140116175 - Engine-off auxiliary hydraulic pressurization system and method for a transmission
An auxiliary hydraulic pressurization system for use with a vehicle including a transmission having a hydraulic reservoir, a hydraulic circuit, and a main pump is disclosed herein. The auxiliary hydraulic pressurization system includes an auxiliary pump and a controller. The auxiliary pump has a low side adapted to be coupled...

03/20/14 - 20140076086 - Device for translatably controlling the movement of a gear change fork for a motor vehicle gearbox
The invention relates to a device which comprises a gear change fork (1), a hydraulic cylinder including a stationary cylindrical spindle (2) with a stationary transverse wall (3) projecting from said spindle (2) and a piston that is translatably movable by sliding over said transverse stationary wall (3). The piston...

01/30/14 - 20140026703 - Main modulation calibration using control main valve
Various embodiments of methods, apparatus and systems that calibrate main modulation of an electro-hydraulic control system for a vehicle transmission are presented. Some embodiments calibrate regulator control signals that cause a main regulator valve to develop a main line pressure based upon status of a control main valve that develops...

01/23/14 - 20140020494 - Method for controlling an automated transmission
A method of controlling an automated transmission with positioning cylinders (6, 8, 20) controlled by shift valves or venting valves (10, 12, 16, 18, 22, 24). At least one cut-off valve (4) is positioned in front of the shift or venting valves and a control device controls the valves while...

01/09/14 - 20140007727 - Method of controlling a synchronizer actuator fork of a transmission
A method of adjusting a pressure signal to an actuator piston to control movement of a synchronizer actuator fork of a transmission includes moving the synchronizer actuator fork from a start position into a target position by applying an initial fluid pressure value. The time required to move the synchronizer...

12/26/13 - 20130340556 - Methods and systems for improving the operation of transmissions for motor vehicles
A method in which the control lockup relay of a “factory installed” A750E, A750F, or A761E automotive transmission is removed from the original valve bore in which it is received, the width of the valve bore in enlarged, and the original control lockup relay is replaced by a wider control...

12/19/13 - 20130333508 - Hydraulic control system for a continuously variable transmission
A hydraulic control system for a continuously variable transmission includes a pressure regulator subsystem, a ratio control subsystem, a torque converter control (TCC) subsystem, a variable lubrication control subsystem, a variator clamping subsystem, and a clutch control subsystem. The variable lubrication control subsystem allows for increased and decreased oil flow...

12/12/13 - 20130327172 - Hydraulic control system for an automatic transmission
A hydraulic control system for a transmission of a motor vehicle includes a source of pressurized hydraulic fluid that communicates with an analog electronic transmission range selection (ETRS) subsystem or a manual valve. The ETRS subsystem includes an ETRS valve, a park servo, a park mechanism, a mode valve, and...

12/05/13 - 20130319155 - Hydraulic control system for an automatic transmission having analog electronic transmission range selection
A hydraulic control system for a transmission includes a source of pressurized hydraulic fluid that communicates with an electronic transmission range selection (ETRS) subsystem. The ETRS subsystem includes an ETRS valve, a park mechanism, a mode valve, a latch valve assembly, and a plurality of solenoids. The ETRS subsystem is...

12/05/13 - 20130319156 - Discrete mechanism for electronic transmission range selection
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...

11/28/13 - 20130312561 - Electro-hydraulic control apparatus for a motor-vehicle transmission with at least five forward gears and one reverse gear
An electro-hydraulic control apparatus for a motor-vehicle transmission having at least five forward gears and one reverse gear, including first, second and third shift forks, each movable in at least one engagement position to engage a respective gear, first, second and third hydraulic actuators each arranged to control the movement...

11/14/13 - 20130298713 - Oil pressure control device of automatic transmission
An oil pressure control device includes: line pressure adjusting means for adjusting the line pressure; line pressure switching means for switching, in two stages, the line pressure adjusted by the line pressure adjusting means; a linear solenoid valve that adjusts a required oil pressure for engaging frictional engagement elements with...

09/19/13 - 20130239730 - Electro-hydraulic control including blocking features for multi-speed automatic transmission
A control for a multi-speed automatic vehicle transmission is provided. Electrical and hydraulic components are provided, including pressure control or “trim” valve systems in fluid communication with shift valves and electrohydraulic actuators to selectively engage and disengage the transmission clutches or other shift mechanisms. Pressure switches are provided for the...

09/12/13 - 20130233110 - Range switching device
Provided is a range switching device for performing switching among drive, reverse, and neutral ranges of a transmission. The device includes a first switching valve driven by a first actuator and a second switching valve driven by a second actuator. The valves switch an oil channel to transmit the oil...

09/12/13 - 20130233111 - Control apparatus for automatic transmission
A control apparatus for an automatic transmission including three frictional engagement elements is configured to set engagement pressures of first and second frictional engagement elements at the time when a predetermined shift speed is established such that a torque capacity of a third frictional engagement element becomes smaller than torque...

08/29/13 - 20130220052 - Range switching device
A range switching device for performing switching the range of a transmission includes first control valve, a second control valve having a characteristic opposite to the first control, and first, second, third and fourth switching valves for controlling the transmission of oil pressures. The first and second switching valves cooperatively...

08/29/13 - 20130220053 - Method for determining an operating condition of a positively engaging shifting element of a transmission device
A method of determining an operating state of a form-locking shift element of a transmission apparatus that, at least for changing one operating state between a disengaged operating state and an engaged operating state, is pressurized with an actuating pressure by a pressure-conducting region of the transmission apparatus. The pressure...

06/13/13 - 20130145883 - Electronically controlled range valve for multi-speed planetary transmission
A shift by wire control for a multi-speed vehicle transmission is provided. The control includes a shift by wire shift valve in fluid communication with other shift valves and clutch trim valves to provide double blocking features in the neutral range and a reverse range. The shift by wire valve...

06/06/13 - 20130139633 - Oil supplying assembly for transmission of vehicle
An oil supplying assembly for a transmission of a vehicle, which may supply oil to a clutch and a pulley of a transmission, may include a base member which is mounted to a transmission main body, and includes a first oil path supplying the oil to the clutch and an...

05/09/13 - 20130112030 - Automatic transmission having high pressure actuation and low pressure lube hydraulic circuit
An automatic transmission having high pressure actuation and low pressure lube includes a hydraulic circuit (110) having a source of pressurized fluid (112), an actuation circuit (114) that delivers pressurized fluid to actuate components of the transmission, and a cooling circuit (116) used to cool components of the transmission. The...

05/02/13 - 20130104683 - Shift arrangement for a motor vehicle gearbox
Shift arrangement for a motor vehicle gearbox. The shift arrangement has a shift element which can be connected or is connected to a shift member. The shift arrangement has a hydraulic actuator by means of which the shift element can be moved in a first shifting direction and in an...

03/07/13 - 20130055840 - Electro-hydraulic actuation group for an automotive servo-assisted mechanical transmission
In an automotive servo-assisted mechanical transmission, an electro-hydraulic actuation group has an actuation unit, a power unit able to provide hydraulic pressure to the actuation unit and an electronic control unit, the actuation and power units being equipped with respective components that are all mounted on a hydraulic casing of...

01/31/13 - 20130025396 - Hydraulic system for actuating at least one shifting element of a transmission
A hydraulic system (1) for actuating at least one shifting element (2) of a transmission. The hydraulic system comprises a regulating valve device (3) that can be preset and has a regulating valve slide (8), and a shifting valve device (4) which can also be preset and has a shifting...

12/27/12 - 20120325038 - Hydraulic system for actuating an interlocking switching element of a gearing device
A hydraulic system for actuating an interlocking shifting element of a transmission which comprises two piston chambers and a piston element that delimits the piston chambers. The piston element can be acted upon in one piston chamber by a pressure to open the shifting element and, in the other piston...

11/01/12 - 20120272768 - Device for operating a transmission apparatus having a plurality of electrohydraulically actuated friction-fit and form-fit shift elements
A mechanism for actuating a transmission having shifting elements. A self-holding valve device is movable into a first position, by a pilot pressure, against a force directed to a second position and held by a pressure holding signal in the first position. Transmission of a pressure signal, to a switching...

11/01/12 - 20120272769 - Hydraulic arrangement for actuating a plurality of shift rails
A hydraulic arrangement by which a plurality of shift rails of a transmission are actuated, including one double acting cylinder per shift rail by which the respective shift rail can be moved back and forth. A first hydraulic valve is connected upstream of the plurality of shift rails and has...

11/01/12 - 20120272770 - Transmission actuator
The invention relates to a transmission actuator for actuating a manual transmission in an automated manner, comprising a lane selection actuating cylinder (1) for selecting a shift lane (8, 9, 10, 11) and a gear selection actuating cylinder (2) for engaging a gear (12, 13, 14, 15, 16, 17, 18)...

07/05/12 - 20120167704 - Device for the pulsed release of an amount of fluid which can be stored in an accumulator housing
1. Device for the pulsed release of an amount of fluid (3) which can be stored in an accumulator housing (2). 2. A device for the pulsed release of an amount of fluid which can be stored in a storage housing (2) is characterized in that a locking device (7)...

06/14/12 - 20120144945 - Single-piston three-position hydraulic actuator
An actuator assembly includes a housing, a piston disposed within a portion of the housing. The piston has a movable range along a working-axis, and separates a first volume and a second volume within the housing. The assembly also includes a biasing feature disposed within the second volume, where the...

06/14/12 - 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...

06/07/12 - 20120137811 - Vehicle having a transmission and a selection element for shifting gears
A vehicle includes a transmission having at least one controllable actuator provided for engaging and/or disengaging at least one transmission gear, and a selection element to be operated manually, by which the actuator can be controlled, wherein. In order to engage a transmission gear, the selection element must first be...

04/19/12 - 20120090420 - Control of torque transfer between an engine and a manual transmission
A system for controlling a transfer of torque from an engine to a manual transmission having a plurality of shiftable gears includes a selectively releasable and re-engageable clutch. The clutch is arranged inside the transmission and configured to transmit torque of the engine to the transmission when the clutch is...

04/05/12 - 20120079905 - Hydraulic control for powershift transmission
A method for controlling a transmission includes using signals of first solenoids to control first and second clutches, servos of first gears and servos of second gears, using signals of a second solenoid to establish a flow rate to cool the clutches and to actuate the servo that is associated...

03/29/12 - 20120073398 - Manual valve control for multi-speed planetary transmission
A manual valve control for a multi-speed vehicle transmission is provided. Electronic and hydraulic components are provided, including trim valve systems that are multiplexed by a shift valve and a manual valve. The trim valves and shift valve are self-diagnosing via a plurality of multiplexed pressure switches. The control enables...

03/01/12 - 20120048049 - Transmission device having at least one shift element that can be actuated by means of an actuator
A transmission device (1) including at least one shift element (3, 4) that can be actuated via an actuator (6) having at least one electrical component (5). The electrical component (5) is connected to a transmission shaft (7), rotates during operation at the rotational speed of the transmission shaft (7),...

01/26/12 - 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...

12/29/11 - 20110314943 - Control device for an automated geared transmission
In a control arrangement for an automated gear shift transmission, particularly a dual clutch transmission, which provides for a plurality of functionalities with a relatively small number of slides and control valves, a first gear slide, which is assigned to a first shift device and by means of which an...

12/29/11 - 20110314944 - Control device for an automated gear shift transmission
In a control arrangement for an automated gear shift transmission, particularly a dual clutch transmission with a partial transmission having two gears which must not be simultaneously engaged, simultaneous engagement of the two gears of the partial transmission is prevented by a gear actuation system which has a first and...

12/29/11 - 20110314945 - Hydraulic control arrangement for an automated shift transmission
In a hydraulic control arrangement for an automated shift transmission, in particular a dual clutch transmission in a motor vehicle including a hydraulic control arrangement, the hydraulic control arrangement has a main pump and a controllable additional pump which jointly ensure that oil is supplied to the hydraulic control arrangement....

12/15/11 - 20110303040 - Electro-hydraulic failure recovery control for dual clutch transmission
A control for a multi-speed automatic vehicle transmission includes electrical and hydraulic components, such as pressure control valve systems in fluid communication with shift valves and electrohydraulic actuators. The control includes electrohydraulic features configured to enable the transmission to respond to an electrical failure whether the transmission is in neutral,...

10/13/11 - 20110247443 - Hydraulic control apparatus for automatic transmission
A hydraulic control apparatus for an automatic transmission has a circulating oil supply passage that supplies circulating oil to a starting apparatus, a circulating oil discharge passage that discharges circulating oil from the starting apparatus, and a speed change mechanism oil supply passage that supplies oil to a speed change...

10/06/11 - 20110239803 - Hydraulic control system for automatic transmission and control system for automatic transmission
An automatic transmission hydraulic control system with a first friction engagement element engaged at a first forward gear and establishment of a reverse gear, and a second friction engagement element engaged at least at a second different forward gear including a range pressure output unit outputting a reverse range pressure...

10/06/11 - 20110239804 - Control device
A control device for controlling a transmission device configured such that when the speed change mechanism performs switching to a shift speed with a different speed ratio, special speed change control is executed in which a disengagement hydraulic pressure, is lowered to cause a disengagement element to slip, and in...

09/29/11 - 20110232409 - Control apparatus for automatic transmission
There is provided, in one aspect of the present description, an automatic transmission. In one example, the automatic transmission comprises a transmission case, a valve body which is arranged in the transmission case, a control valve mechanism which controls oil pressures in parts of the automatic transmission and is installed...

09/15/11 - 20110219903 - Driving force control apparatus
A driving force control apparatus (100) is mounted on a vehicle, and the driving force control apparatus is provided with: an engine (11); an automatic transmission (12); an engaging device (122) capable of adjusting extent of transmission of power between the engine and the automatic transmission in accordance with degree...

09/15/11 - 20110219904 - Hydraulic control apparatus of automatic transmission
A hydraulic control apparatus of an automatic transmission including a switching portion which, at the same time as a reverse range pressure oil passage and a discharge delay oil passage which delays an oil pressure output are connected, causes the reverse range pressure oil passage and discharge delay oil passage,...