Patent application number | Description | Published |
20120241280 | MULTI-DISC FRICTIONAL ENGAGEMENT MECHANISM - A multi-disc frictional engagement mechanism includes a plurality of driven plates and drive plates, a hydraulic piston, a spring which comes into contact with a pressure receiving portion of the hydraulic piston, an oil chamber which causes a hydraulic pressure to act on the pressure receiving portion, and a lock mechanism which restricts a movement of the hydraulic piston in a coupling direction toward the driven plates and the drive plates in a state where the hydraulic pressure is supplied to the oil chamber, the spring is compressed by the pressure receiving portion and the driven plates and the drive plates are not coupled. | 09-27-2012 |
20120247913 | MULTI-DISC FRICTIONAL ENGAGEMENT MECHANISM - A multi-disc frictional engagement mechanism includes driven plates and drive plates, a clutch piston including a radially extending first pressure receiving portion, a joint piston including a radially extending second pressure receiving portion and an engaging portion which is engaged with a clutch hub to engage the clutch hub and the clutch drum such that the clutch hub and the clutch drum are not relatively rotatable when the joint piston advances, a first oil chamber which causes a hydraulic pressure to act on the first pressure receiving portion, and a second oil chamber which communicates with the first oil chamber and to which the hydraulic pressure is supplied later than to the first oil chamber to act on the second pressure receiving portion when the hydraulic pressure is supplied to the first oil chamber. | 10-04-2012 |
20150141189 | FRICTION ENGAGEMENT DEVICE - In friction engagement device having forward clutch | 05-21-2015 |
20150217773 | AUTOMATIC TRANSMISSION AND CONTROL METHOD FOR THE AUTOMATIC TRANSMISSION - A control unit performs a engaging control, which supplies an ON pressure to a engaging-side oil chamber to set a lock mechanism to a locked state and then decreases the hydraulic pressure of the engaging-side oil chamber, when a running mode is selected, and performs a releasing control, which supplies an OFF pressure to a release-side oil chamber to set the lock mechanism to an unlocked state and then decreases the hydraulic pressure of the release-side oil chamber, when a non-running mode is selected. The control unit supplies the OFF pressure to the release-side oil chamber when the stop of the operation of the driving force source is notified, and allows stopping the operation of the driving force source when the lock mechanism becomes the unlocked state afterward. | 08-06-2015 |
20150240937 | AUTOMATIC TRANSMISSION AND CONTROL METHOD FOR THE SAME - A control unit performs a fastening control, which supplies an ON pressure to a fastening-side oil chamber to set a lock mechanism to a locked state and then decreases a hydraulic pressure of the fastening-side oil chamber, when a running mode is selected, and performs a releasing control, which supplies an OFF pressure to a release-side oil chamber to set the lock mechanism to an unlocked state and then decreases a hydraulic pressure of the release-side oil chamber, when a non-running mode is selected. The control unit supplies the OFF pressure to the release-side oil chamber when a stop of operation of the driving force source is notified, and allows stopping the operation of the driving force source when the lock mechanism becomes the unlocked state afterward. | 08-27-2015 |
20150240938 | AUTOMATIC TRANSMISSION EQUIPPED WITH FRICTION ELEMENT HAVING LOCKING MECHANISM ATTACHED THERETO, AND CONTROL METHOD THEREFOR - A transmission controller determines whether a vehicle is going to stop based on a driving condition of the vehicle. When it is determined that the vehicle is going to stop, a lock mechanism is placed in an unlocked state through a supply of an OFF pressure to an OFF pressure piston chamber even if a D mode is selected by a select switch. | 08-27-2015 |
20150247568 | AUTOMATIC TRANSMISSION WITH FRICTION ELEMENT HAVING LOCK MECHANISM, AND CONTROL METHOD THEREOF - A control unit for an automatic transmission determines whether or not a lock mechanism is in a locked condition when a non-travel mode is selected by a select switch, and does not supply an OFF pressure to a disengagement side oil chamber when it is determined that the lock mechanism is not in the locked condition. | 09-03-2015 |
20150247569 | AUTOMATIC TRANSMISSION EQUIPPED WITH FRICTION ELEMENT HAVING LOCKING MECHANISM ATTACHED THERETO, AND CONTROL METHOD THEREFOR - A transmission controller judges whether or not there was performed a specific shift operation where the mode of a transmission is alternately switched between a D-mode and a R-mode, and when it is judged that the specific shift operation was performed and when a forward clutch is engaged, the forward clutch is brought into an engaged state by supplying a hydraulic pressure lower than a lock pressure, with which a locking mechanism is brought into a locked state, to an ON-pressure piston chamber. | 09-03-2015 |
20150247570 | AUTOMATIC TRANSMISSION AND CONTROLLING METHOD OF AUTOMATIC TRANSMISSION - An automatic transmission is provided having a friction element in which, when an ON pressure is supplied to a engaging-side oil chamber, a hydraulic piston is moved and engaged, a lock mechanism enters a lock state, while when an OFF pressure is supplied to a release-side oil chamber, the lock mechanism is released, and the hydraulic piston is moved and released, in which the OFF pressure is supplied to the release-side oil chamber again when a mode of the automatic transmission changes from a mode for engaging the friction element to a mode for releasing the friction element, and when the friction element is not released even if the OFF pressure is supplied to the release-side oil chamber. | 09-03-2015 |
20150252892 | AUTOMATIC TRANSMISSION EQUIPPED WITH FRICTION ELEMENT HAVING LOCKING MECHANISM ATTACHED THERETO, AND CONTROL METHOD THEREFOR - A transmission controller performs engagement processing, where a forward clutch is engaged and a lock mechanism is brought into a locked state by supplying an ON-pressure to an ON-pressure piston chamber and where the hydraulic pressure of the ON-pressure piston chamber is lowered, and supplies the ON-pressure to the ON-pressure piston chamber when the forward clutch slips even though the forward clutch has been engaged in the engagement processing, while a vehicle is traveling. | 09-10-2015 |
20150252894 | AUTOMATIC TRANSMISSION AND CONTROL METHOD FOR THE AUTOMATIC TRANSMISSION - A control unit performs a engaging control, which supplies an ON pressure to a engaging-side oil chamber to set a lock mechanism to a locked state and then decreases the hydraulic pressure of the engaging-side oil chamber, when a running mode is selected, and performs a releasing control, which supplies an OFF pressure to a release-side oil chamber to set the lock mechanism to an unlocked state and then decreases the hydraulic pressure of the release-side oil chamber, when a non-running mode is selected. In the case where the control unit determines to control the friction element in the engaged state to become the released state, the control unit starts supplying the OFF pressure to the release-side oil chamber to cause the unlocked state of the lock mechanism, and starts supplying the hydraulic pressure to the engaging-side oil chamber and reduces the hydraulic pressure of the release-side oil chamber. | 09-10-2015 |
20150252896 | AUTOMATIC TRANSMISSION WITH FRICTION ELEMENT HAVING LOCK MECHANISM, AND CONTROL METHOD THEREOF - In an automatic transmission including a friction element having a lock mechanism, to prevent a delay in engagement of the friction element from occurring in a case where travel mode→non-travel mode→travel mode are selected at short time intervals during travel, a control unit or the automatic transmission does not supply an OFF pressure to a disengagement side oil chamber when the non-travel mode is selected by a select switch and a vehicle speed is higher than a stoppage determination vehicle speed. | 09-10-2015 |
20150276057 | CLUTCH CONTROL DEVICE FOR AUTOMATIC TRANSMISSION - Provided is a clutch device capable of reducing energy loss caused by clutch-engaging pressure. The clutch control device for an automatic transmission is equipped with: a manual valve ( | 10-01-2015 |