A DCT shifting control method of a vehicle includes: a temporary engaging step that engages an N-3 stage gear having a gear ratio larger than an N stage gear that is a currently engaged gear; a first torque switching step that starts to slip a first clutch engaged with the N-3 stage gear and disengages a second clutch engaged with the N stage gear that is the currently engaged gear; a synchronization speed adjusting step that synchronizes a speed of a power source of a vehicle with a desired input shaft speed by controlling the power source of the vehicle, disengages the N stage gear, and engages the N-2 stage gear that is the desired gear, with the slip of the first clutch maintained; and a second torque switching step that finishes shifting by disengaging the first clutch and engaging the second clutch.

A shift control apparatus for an automatic transmission includes a controller. The controller is configured to control the automatic transmission. The automatic transmission includes a first input shaft, a second input shaft, an output shaft, a first clutch, a second clutch, and gear trains. In a case where a standby shift stage does not lie between a predetermined current shift stage and a target shift stage, the controller controls the first clutch to be disengaged and the second clutch to be engaged, and then controls a synchronizing device among synchronizing devices for the predetermined current shift stage to be disengaged and a synchronizing device among the synchronizing devices for the target shift stage to be engaged during a disengagement of the first clutch, and then controls the second clutch to be disengaged and the first clutch to be engaged.

Methods and systems are provided for performing a multiple gear downshift of a transmission gear by transiently operating in an intermediate gear. In response to ambient humidity and a condensate level in a charge air cooler, the transmission gear may be downshifted from a higher gear to an intermediate gear, and then to a requested lower gear. Downshifting through an intermediate gear may also be controlled based on the gear shift request.

A system controls an engine of a manual transmission vehicle and estimates a gear stage to control an engine speed in a race mode and recognizes a select position of an N-stage to control an engine speed at two steps during a skip-down shift in a normal mode, and a method controls an engine of a manual transmission vehicle. The method includes determining a driving mode of the vehicle and an acceleration condition and a deceleration condition when the driving mode of the vehicle is a race mode. The method controls the engine at an engine speed corresponding to an upshift when the acceleration condition is satisfied, and controls the engine at an engine speed corresponding to a downshift when the deceleration condition is satisfied.

A shift control system and a shift control method configured to execute a skip shift smoothly are provided. The shift control system selects an interim gear stage with reference to a control map. The control map is configured to determine: an intense region where a driver is allowed to sense an increase in the acceleration sufficiently based on an unconscious period, and a stimulation intensity; and a moderate region where acceleration is increased in a mild manner. During execution of the skip shift, the acceleration is increased in a mild manner by shifting the gear stage from an initial stage to the interim gear stage, and then increased significantly by shifting the gear stage from the interim gear stage to a target gear stage.

A control apparatus for an automatic transmission includes a vehicle speed detector and a controller. The vehicle speed detector is configured to detect a vehicle speed. The controller is configured to set one of a plurality of gear change stages according to a running condition of a vehicle and configured to select one of a plurality of engagement combination states of a plurality of engagement mechanisms to achieve, according to the vehicle speed detected by the vehicle speed detector, at least one gear change stage out of the plurality of gear change stages in a case in which the controller sets the at least one gear change stage. The at least one gear change stage has the plurality of engagement combination states to achieve the at least one gear change stage.

A method is provided to control a hybrid powertrain comprising engaging gears corresponding to a first gear pair connected with a first planetary gear in a gearbox with a first coupling device connecting two rotatable components in the first planetary gear; activating a second electrical machine to generate a propulsion torque on the output shaft via a second gear pair connected with a second planetary gear and the output shaft; disconnecting the first gear pair from the countershaft, by controlling the first electrical machine and a combustion engine connected with the first planetary gear to achieve a substantially zero torque state between the first gear pair; connecting the first gear pair to the countershaft, by controlling the combustion engine to achieve a synchronous rotational speed between the first gear pair; and activating the combustion engine and/or the first electrical machine to generate a propulsion torque on the output shaft.

A control device for an automatic transmission is provided. The automatic transmission is configured to realize a plurality of gear shift stages by combination of a plurality of engaging devices engaged or released among the plurality of engaging devices. The control device includes an electronic control unit. The electronic control unit is configured to select, as the setting pattern realizing an intermediate gear shift stage, the setting pattern with a smaller number of switching of the engagement or release of the engaging device than the number of switching of the setting pattern with the largest number of switching among the plurality of setting patterns when a shift is performed from a first gear shift stage to a second gear shift stage through the intermediate gear shift stage in a case where the electronic control unit determines that the shift is to be performed through the intermediate gear shift stage.