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

The invention provides a gear shifting mechanism of a transmission, which belongs to the technical field of automobiles. It solves the problem that the existing transmission shifting mechanism has a complex structure and occupies a large space, and is not suitable for light and small cars. The transmission shift mechanism includes a shift shaft fixedly connected to the transmission case and a shift fork sleeved on the shift shaft. The transmission case also has a cylindrical hub connected to the power input end. The outer side has guide rails with the same number and corresponding positions as the forks, and a part of the forks is connected with the guide rails. The shifting mechanism of the transmission has the advantages of simpler and more compact structure and better shifting effect.

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 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.