POWER TRANSMISSION DEVICE

摘要

A power transmission device includes a synchronous meshing mechanism, a braking mechanism, a shift mechanism, a parking gear, a parking mechanism, and a control unit. In the case where the shift mechanism is switched to a parking range, the control unit performs braking continuation processing for continuing the braking of the braking mechanism (step 4) regardless of a driver's braking operation, inhibits the rotation of the driven gear shaft by the parking mechanism, places a predetermined synchronous meshing mechanism in a connected state as a preparation for starting up the vehicle again, and then ends the braking continuation processing (step 5).

主权项

1. A power transmission device including:
an input shaft which is rotated by power of a drive source; and an output shaft arranged in parallel with the input shaft, wherein the rotational speed of the input shaft is changed to a plurality of stages and output from the output shaft via a plurality of gear trains with different transmission gear ratios each having a drive gear and a driven gear meshing with the drive gear, the power transmission device comprising: a drive gear shaft which fixes or rotatably supports the drive gears of the plurality of gear trains; a driven gear shaft which rotatably supports or fixes the driven gears of the plurality of gear trains; a meshing mechanism which selects any one of the gear trains and connects a gear rotatably supported by the drive gear shaft or the driven gear shaft among the drive gear and the driven gear of the selected gear train to the corresponding shaft to enable power transmission between the drive gear shaft and the driven gear shaft by the selected gear train; a braking mechanism which brakes wheels according to a driver's braking operation; a shift mechanism capable of switching between a running range and a parking range; a parking mechanism, which has a parking gear to which the rotation of the driven gear shaft is transmitted and an engaging portion which engages with the parking gear to inhibit the rotation of the parking gear, inhibits the rotation of the driven gear shaft by inhibiting the rotation of the parking gear; and a control unit which controls the meshing mechanism, the braking mechanism, and the parking mechanism, wherein the control unit performs braking continuation processing for continuing braking of the braking mechanism regardless of the driver's braking operation in a case where the shift mechanism is switched to the parking range, inhibits the rotation of the driven gear shaft by the parking mechanism, places a predetermined meshing mechanism in a connected state as a preparation for starting up the vehicle again, and then ends the braking continuation processing.