129results about How to "Improve shift performance" patented technology

A hybrid-vehicle driving system includes an engine, a transmission, a first motor / generator provided between the engine and the transmission, and a battery that can charge and discharge the first motor / generator. When an estimated output voltage of the first motor / generator becomes higher than or equal to a predetermined voltage during a gear shift operation of the transmission, the battery is electrically disconnected from the driving system, and the voltage of a power line on the side of the first motor / generator is then decreased so as to charge the battery.

The invention relates to a power shift transmission (10). The power shift transmission comprises an input shaft (18), a first output shaft (20) arranged coaxially to the input shaft (18), a planetary transmission (22) having a planet gear carrier (28), which is connected to the input shaft (18), and at least one dual-stage planetary gear set (30), the dual-stage planetary gear set (30) engaging on the input side with an input-side sun gear (52) and on the output side with an output-side sun gear (44) in each case, and at least two shift elements (24, 26). To produce a variable power shift transmission for several pairings of various operation modes, the first output shaft (20) can be connected to the output-side sun gear (44) of the dual-stage planetary gear set (30) by means of a first shift element (24) and the first output shaft (20) can be directly connected to the input shaft (18) by means of a second shift element (26), the input-side sun gear (52) of the dual-stage planetary gear set (30) being non-non-rotatably connected to a housing (12) of the power shift transmission (10).

Shift performance of a powertrain system of a hybrid electric vehicle is enhanced by a powertrain system including a clutch, a primary motor, an automated shift gearbox (ASG) connected to the engine interposing the clutch, a secondary motor; and a differential gearbox, wherein the primary motor is disposed between an output shaft of the clutch and an input shaft of the ASG, and the secondary motor is disposed between an output shaft of the ASG and an input shaft of the differential gearbox.

The invention provides a transmission dual-H control mechanism with obvious hand feel of high-low gear shifting. The transmission dual-H control mechanism comprises a control shell, a transverse shift lever, a shift head and a gear selecting hand feel control block, wherein the transverse shift lever, the shift head and the gear selecting hand feel control block are arranged in the control shell. One end of the transverse shift lever is a gear shifting input end, and the other end of the transverse shift lever is connected with a high-low gear shifting and return balancing device. The shift head is fixed to the transverse shift lever, and a gear selecting lever and a dual-H valve are arranged on the positions, corresponding to the matching position of the shift head, of the control shell respectively. The gear selecting hand feel control block is fixed to the transverse shift lever, and the control shell is provided with the hand feel pin matched with the surface of the gear selecting hand feel control block. The hand feel pin is connected to the control shell through a spring. The contact face of the gear selecting hand feel control block and the hand feel pin is provided with working surfaces corresponding to gear selecting operation in sequence, the working surfaces corresponding to selecting from low gears to a rear gear are inclined planes extending outwards in the axial direction, and the working surfaces corresponding to selecting from high gears or a neutral gear to high gears are provided with outward protrusions. When the hand feel pin makes contact with the inclined planes or the protrusions, the spring is compressed.

A shift control method of an automatic transmission may include detecting an end point of an inertia section during upshifting, momentarily reducing a hydraulic pressure applied to engagement side frictional elements at the detected end point of the inertia section, increasing the reduced hydraulic pressure with a predetermined gradient until reaching a synchronization point, and momentarily increasing the hydraulic pressure when the synchronization point may be reached.

The invention relates to a manual gearbox and a vehicle including the same. The manual gearbox comprises an input shaft connected with an engine, an output shaft selectively engaged to the input shaft through a blockage gear, and a reverse gear shaft parallel to the input shaft, wherein the input shaft is connected with a forward gear driving gear and a reverse gear driving gear; the output shaft is connected with a forward gear driven gear; synchronizers are arranged between every two forward gear pairs; a low-gear synchronizer gear sleeve is connected with a reverse gear driven gear; and a reverse gear idle wheel is arranged on the reverse gear shaft, and can forwards and backwards slide to be joined with the reverse gear driving gear and the reverse gear driven gear. The manual gearbox has the advantages of compact arrangement, low cost, light weight and high strength, satisfies the customer needs in gear shifting quality and noise level, and guarantees the maximal compatibility with an existing production process.