Class / Patent application number | Description | Number of patent applications / Date published |
475127000 | Pressure regulation | 21 |
20080207375 | Hydraulic control apparatus for automatic transmission, and hybrid drive system provided with the same - A hydraulic control apparatus includes a switching device that switches between a hydraulic servo of the plurality of hydraulic servos of the first friction engaging element and a hydraulic servo of the plurality of hydraulic servos of the second friction engaging element so as to supply a control pressure from the one pressure regulating solenoid valve to each of the plurality of hydraulic servos, wherein the switching enables a control of an engagement and disengagement of the first friction engaging element and the second friction engagement element using the one pressure regulating solenoid valve. | 08-28-2008 |
20090011888 | AUTOMATIC TRANSMISSION HYDRAULIC PRESSURE CONTROL APPARATUS - An automatic transmission hydraulic pressure control apparatus decreases a hydraulic pressure lower limit value as much as possible without causing a non-operating zone of a solenoid valve to be included in a control region of the solenoid valve due to product variation. First and second determinations are alternately performed to determine if a solenoid command value is in a non-operating zone by alternately changing the solenoid command value to decrease and increase the actual hydraulic pressure in a step-like manner. The solenoid command value of an immediately previous cycle in which the first determining section determined that the solenoid command value was not in the non-operating zone is set as a solenoid command limit value when one of the first and second determining sections has determined that the solenoid command value is in the non-operating zone. | 01-08-2009 |
20090143180 | Hydraulic control device for automatic transmission - A hydraulic control device for an automatic transmission includes a first solenoid valve, a second solenoid valve, a third solenoid valve, a preliminary shift speed switching valve, and a hydraulic pressure supply switching valve. A second friction engagement element is engaged at high speed side shift speeds, a low speed that is one of low speed side shift speeds is achieved by engagement of a first friction engagement element and a third friction engagement element, and a high speed that is one of the high speed side shift speeds is achieved by engagement of a second friction engagement element and the third friction engagement element. | 06-04-2009 |
20090203480 | DEVICE FOR CONTROLLING A FLUID-ACTIVATED DOUBLE-ACTION OPERATING CYLINDER - A device for controlling a fluid-actuated, double-action operating cylinder ( | 08-13-2009 |
20090286643 | COMBINATION CONTINUOUSLY VARIABLE TRANSMISSION AND PLANETARY TRANSMISSION - A modular assembly of a transmission is provided in which a continuously variable transmission module is separable from a planetary transmission module. When connected, the two modules function as a single transmission. The two modules are connectable in multiple orientations relative to each other. A single fluid source can be provided for operation of the two modules. | 11-19-2009 |
20100137093 | Automatic Transmission with Closed Loop Pressure Electro-Hydraulic Control Module - An automatic transmission is disclosed that includes a clutch pressure control module housing having therein:
| 06-03-2010 |
20110130237 | 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 single and double range shifts among the multiple forward speed ratios, including shifts to and from sixth and higher forward ratios, reverse and neutral. The control also includes a reduced engine load at stop feature. In addition, a power off/limp home feature provides a plurality of failure modes, including a failure mode for sixth and higher forward speed ratios. | 06-02-2011 |
20110136608 | HYDRAULIC CONTROL SYSTEM OF POWER TRAIN FOR HYBRID VEHICLE - The present invention provides a hydraulic control system of a power train for a hybrid vehicle that allows the power train of a hybrid vehicle to implement all of two or more EV modes, two or more power split modes, and at least three or more fixed-stage modes, with a relatively simple configuration, and achieves satisfactory power performance of the power train and fuel efficiency and reduce the cost of the valve body, remove possibility of malfunction, and implements a limp home function when a controller is broken. | 06-09-2011 |
20130296092 | ROTATING CLUTCH BALANCE FILL SYSTEM - A rotating clutch operably disposed between two rotating components includes a hydraulic operator having a piston and, on one side of the piston, an apply chamber or cavity and, on the opposite side of the piston, a balance chamber or cavity. The apply chamber is selectively provided with pressurized hydraulic fluid to engage and release the clutch to couple and de-couple the two rotating components. The balance chamber is provided with a flow of pressurized hydraulic fluid from the transmission lubrication system that flows through the transmission main shaft and flow restricting passages to the balance chamber. An exhaust port downstream of the balance chamber releases excess hydraulic fluid flow. Thus, whether, the clutch is rotating or not, hydraulic pressure is maintained in the balance chamber and proper clutch operation is assured. | 11-07-2013 |
20130296093 | LATCHING CLUTCH CONTROL SYSTEM - A clutch latching system is provided for latching and draining a torque transmitting mechanism. The latching clutch control system may include a latching valve, a release valve, and an accumulator. The clutch latching system may include a clutch feed channel configured to provide hydraulic fluid from a pressurized source to a torque transmitting device when the torque transmitting device is engaged and the engine is running. A latching valve connects the clutch feed channel to the torque transmitting device. The latching valve is configured to selectively trap pressurized hydraulic fluid within the torque transmitting device. A hydraulic pressure storage circuit configured to selectively provide pressurized hydraulic fluid to the latching valve to unlatch the latching valve. A multiple speed transmission is also provided. | 11-07-2013 |
20150038276 | TRANSMISSION SYSTEM FOR TRANFER CASE - A transmission system for a transfer case can change a high range mode to a low range mode without a shifting shock even while a vehicle is traveling at a constant speed. The transmission system includes a hydraulic system including a hydraulic circuit and a hydraulic cylinder connected to the hydraulic circuit and receiving a hydraulic pressure from a hydraulic pressure source. The transmission system further includes a clutch piston apparatus mounted on a housing of the transfer case and including a clutch piston receiving a hydraulic pressure from the hydraulic pressure source. An operating rod of the hydraulic cylinder is connected to a shift sleeve, and the clutch piston of the clutch piston apparatus is connected to the ring gear of the planetary gear assembly to make the ring gear not rotate according to the operation of the clutch piston supplied with the hydraulic pressure. | 02-05-2015 |
20150308568 | OIL PRESSURE CONTROL DEVICE FOR AUTOMATIC TRANSMISSION - When a user performs an operation to switch from a forward range to a reverse range, an ECU switches an oil passage (referred to hereafter as a “B | 10-29-2015 |
20160091085 | HYDRAULIC CONTROL DEVICE OF AUTOMATIC TRANSMISSION - A hydraulic control device of an automatic transmission configured such that: a first gear stage is formed by engagement of an LR brake and a low clutch; a third gear stage by engagement of the low clutch and an R35 brake; and a reverse gear stage by engagement of the LR brake and the R35 brake. The hydraulic control device includes a cut valve configured to be switched between a first state where a source pressure port of a third linear solenoid valve (SV) configured to control an oil pressure supplied to the R35 brake is connected to an oil pressure source and a second state where the pressure is discharged from the port. The cut valve becomes the second state when the third gear stage is shifted to the first gear stage, and the oil pressure supplied to the low clutch is less than a predetermined oil pressure. | 03-31-2016 |
20160144860 | WORK VEHICLE - A hydraulic oil supply circuit of a work vehicle is configured to supply hydraulic oil to a transmission. A hydraulic oil warming circuit is configured to warm up the hydraulic oil. A control unit is configured to control the transmission, the hydraulic oil supply circuit, and the hydraulic oil warming circuit. The transmission includes a hydraulic clutch and a clutch control valve. The clutch control valve is configured to control the pressure of the hydraulic oil supplied to the hydraulic clutch according to a command from the control unit. When the control unit determines that the temperature of the hydraulic oil is low, it is configured to output a warming up command for operation of a warming up function. The hydraulic oil warming circuit is configured to warm up the hydraulic oil by causing a pressure loss in a flow path for the hydraulic oil. | 05-26-2016 |
20160144864 | Transmission And Integrated Transfer Case - A transfer case and transmission are designed to permit the transmission hydraulic control system to control a range selection coupler and a torque on demand clutch in the transfer case. Two pressure circuits are transmitted from the transmission to the transfer case: a high range circuit and a low range circuit. The low range circuit is pressurized to engage low range while the range circuit is pressurized to engage high range. The torque on demand clutch is controlled by whichever of these circuits has the higher pressure. Lubrication is provided to a front section of the transfer case via the transmission output shaft, with the fluid returning to the transmission sump through a drainback passageway. The rear portion of the transfer case has a segregated sump. A control strategy is employed to partially fill front section of the transfer case with fluid in preparation for vehicle towing. | 05-26-2016 |
20160146325 | LATCHING CLUTCH CONTROL SYSTEM - A clutch latching system is provided for latching and draining a torque transmitting mechanism. The latching clutch control system may include a latching valve, a release valve, and an accumulator. The clutch latching system may include a clutch feed channel configured to provide hydraulic fluid from a pressurized source to a torque transmitting device when the torque transmitting device is engaged and the engine is running. A latching valve connects the clutch feed channel to the torque transmitting device. The latching valve is configured to selectively trap pressurized hydraulic fluid within the torque transmitting device. A hydraulic pressure storage circuit configured to selectively provide pressurized hydraulic fluid to the latching valve to unlatch the latching valve. A multiple speed transmission is also provided. | 05-26-2016 |
475128000 | Valving controls shift timing | 5 |
20090017952 | VALVE TIMING CONTROL APPARATUS - A first rotary member rotates with a crankshaft and has a first gear. A second rotary member rotates with a camshaft and has a second gear that is axially shifted from the first gear. A planetary rotary member has third and fourth gears, which are eccentrically meshed respectively with the first and second gears to perform a planetary motion. A biasing member is interposed between the planetary rotary member and a planetary carrier, which supports the planetary rotary member. The planetary rotary member is in contact with the biasing member at a contact portion having an axial center. The axial center is located on a radially inner side of a meshed portion between the second and fourth gears, which has a backlash larger than that of a meshed portion between the first and third gears. | 01-15-2009 |
20090082153 | Driving device - In a driving device that includes a mechanical oil pump operated by power of an engine and a motor oil pump EOP operated by power of a motor, provided in parallel with each other, and check valves on discharge sides of the pumps, and pumps oil from any of the pumps and supplies the oil to a clutch included in a transmission, a through hole | 03-26-2009 |
20090143181 | Hydraulic control apparatus for automatic transmission - In a condition of a vehicle which remains stationary or is about to stop and of a forward second speed having a clutch and a brake engaged, an N range is changed from a D range based on a shift lever operation and a forward range pressure is discharged from a manual shift valve. At this time, an orifice and a check ball are used to delay discharge of oil paths which communicate with a linear solenoid valve relative to discharge of an oil path a | 06-04-2009 |
20090312132 | HYDRAULIC CONTROL APPARATUS FOR AUTOMATIC TRANSMISSION - A hydraulic control apparatus for an automatic transmission, including a sequential shift control means for performing sequential shift control in a case where it is necessary to execute the second shift during execution of the first shift. The sequential shift control includes starting reduction of hydraulic fluid pressure in the third friction element when a parameter that varies in accordance with a degree of progress of the first shift has reached a predetermined value, and performing piston stroke control that includes outputting a high hydraulic pressure command as a hydraulic fluid pressure to the second friction element when the selector valve is switched from the second position to the first position, and subsequent to completion of outputting of the high hydraulic pressure command, outputting a low hydraulic pressure command that is lower than the high hydraulic pressure command. | 12-17-2009 |
475129000 | With fluid accumulator | 1 |
20100048340 | AUTOMATIC TRANSMISSION DAMPER MECHANISM - An automatic transmission damper mechanism provided between a first hydraulic passage ( | 02-25-2010 |