摘要:
An automated manual transmission to which a shift position sensor is practically applied has a hydraulic shift actuator that includes a cylinder and a piston that moves in the cylinder in accordance with a speed change operation of the transmission. The shift position sensor comprises a magnet mounted in the piston to move therewith, and a magnaflux detector mounted to a fixed member of the transmission near the hydraulic shift actuator to detect a magnaflux produced by the magnet. The cylinder is so constructed as to cover the magnet even when the piston is subjected to a stroke in the cylinder.
摘要:
A clutch assembly has two pistons (20 and 38) having respective apply chambers (22 and 40) for independently controlling engagement of respective sets of friction plates (28,30 and 46,48). An axially fixed wall (56) is disposed adjacent the pistons opposite the apply chambers. Fluid is admitted between the axially fixed wall and the pistons such that, during rotation of the clutch assembly, centrifugal pressure generated in the fluid in the apply chambers is counteracted by centrifugal pressure generated in the fluid between the axially fixed wall and the pistons.
摘要:
A transfer case having a planetary gear set, a clutch collar, and an actuator. The actuator is configured to actuate the clutch collar between a low speed range position in which the clutch collar engages a planet gear carrier of the planetary gear set, and a high speed range position in which the clutch collar engages a sun gear of the planetary gear set.
摘要:
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.
摘要:
The invention relates to a transmission device for a motor vehicle, having at least one coupling unit (S5a), which comprises at least one frictional locking unit (15a) and at least one positive-locking unit (16a) connected in parallel with the frictional locking unit (15a) in the force flow, having at least one operating actuator (22a), which is provided to operate the frictional locking unit (15a) in a first operating state and to actuate at least the positive-locking unit (16a) in a second operating state, having at least one opposing pressure unit (28a) which is provided to provide an opposing force acting counter to the operating actuator (22a) in at least one operating state, wherein the opposing pressure unit (28a) is provided to change the opposing force during an operation.
摘要:
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.
摘要:
In an automatic transmission (3) including a friction element (5) having a lock mechanism (BL), to prevent a delay in engagement of the friction element (5) from occurring in a case where travel mode → non-travel mode → travel mode are selected at short time intervals during travel, a control unit (9) of the automatic transmission (3) does not supply an OFF pressure to a disengagement side oil chamber (63) when the non-travel mode is selected by a select switch (11) and a vehicle speed is higher than a stoppage determination vehicle speed.
摘要:
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 (57) for outputting a clutch-engaging pressure when the drive position is selected; a clutch (16) capable of clutch engagement by moving a clutch piston (21) using the supply of the clutch-engaging pressure; a clutch-release valve (54) capable of outputting the clutch-release hydraulic pressure by bypassing the manual valve (57); and a locking mechanism (32) for making it possible to mechanically lock the clutch-piston (21) position in a state of reduced clutch-engaging pressure when the clutch is engaged using the supply of clutch-engaging pressure, and also releasing the lock using the clutch-releasing pressure from the clutch-release valve (54).