An electronic control unit suppresses gear shifting more significantly in a second travel mode than in a first travel mode. Accordingly, frequent gear shifting of an automatic transmission in the second travel mode is suppressed, and superior ride quality is obtained. Meanwhile, an amount of a hysteresis in a gear shifting map is smaller in the second travel mode than in the first travel mode. Thus, duration of travel at an optimum gear stage is extended in the second travel mode, and fuel economy is improved. That is, in the second travel mode, drive power responsiveness to an acceleration and deceleration operation as in the first travel mode is unnecessary. Thus, even when gear shifting is suppressed, there is a low possibility that a driver feels a sense of discomfort.

A hydraulic control apparatus may include a first valve bifurcating hydraulic pressures of two pressure control solenoid valves, a second valve selectively supplying one pressure from the first valve to first chambers of first and second actuators and another hydraulic pressure from the first valve to second chambers of first and second actuators, a third valve bifurcating hydraulic pressure from the first valve, a fourth valve selectively supplying one pressure from the third valve to first chambers of third and fourth actuators and selectively supplying another pressure from the third valve to second chambers of third and fourth actuators, and a fifth valve selectively supplying one pressure from the third valve to a first chamber of a fifth actuator and an exhaust port and selectively supplying another pressure from the third valve to a second chamber of the fifth actuator and the exhaust port.

A wheel loader includes a forward clutch, an accelerator pedal, a brake pedal, and a controller configured to control hydraulic pressure of hydraulic oil supplied to the forward clutch. The controller performs clutch hydraulic pressure control for reducing the hydraulic pressure of the hydraulic oil supplied to the forward clutch according to an operation amount of the brake pedal on condition that at least the brake pedal is operated while the accelerator pedal is being operated. The controller continues the clutch hydraulic pressure control even after the clutch shifts from a complete engagement state to a semi-engagement state by the clutch hydraulic pressure control.

A wheel loader includes a forward clutch, an accelerator pedal, a brake pedal, and a controller configured to control hydraulic pressure of hydraulic oil supplied to the forward clutch. The controller performs clutch hydraulic pressure control for reducing the hydraulic pressure of the hydraulic oil supplied to the forward clutch according to an operation amount of the brake pedal on condition that at least the brake pedal is operated while the accelerator pedal is being operated. The controller continues the clutch hydraulic pressure control even after the clutch shifts from a complete engagement state to a semi-engagement state by the clutch hydraulic pressure control.

In gear-shift control apparatus and method for a vehicular transmission, a variator which is interposed between an engine and driving wheels and which is capable of modifying a gear (speed) ratio continuously; a sub transmission which is installed in series with the variator and which is capable of switching a plurality of gear-shift stages through a replacement of engagement elements; and a transmission controller which performs a gear ratio control for the variator and a gear-shift stage control for the sub transmission are installed. During a deceleration through a second speed stage of the sub transmission, when the variator is a state in which the variator is at a lowest gear (speed) ratio, a down-shift in which the sub transmission is forced to perform the gear-shift from a second speed stage to a first speed stage, with the variator maintained at the lowest gear (speed) ratio.

A control apparatus for a vehicle provided with a motor/generator functioning as a drive power source, and a mechanically operated transmission mechanism which constitutes a part of a power transmitting path between the motor/generator and drive wheels, the control apparatus including a motor/generator control portion configured to implement a regenerative torque control of the motor/generator so as to generate a regenerative torque according to a braking operation by an operator of the vehicle in a decelerating run of the vehicle, and a transmission shifting control portion configured to initiate a shift-down action of the mechanically operated transmission mechanism after a rate of change of the regenerative torque has been held within a predetermined range for at least a predetermined length of time, where a determination to implement the shift-down action is made in the process of the regenerative torque control of the motor/generator according to the braking operation.

The present invention is a control device for an automatic transmission, the control device being adapted to control the automatic transmission including a torque converter and a stepped transmission mechanism provided on a power transmission route from the torque converter to drive wheels, wherein while a non-driving range of the automatic transmission is selected, determination on interlock in the stepped transmission mechanism is executed on the basis of deceleration of an output shaft of the stepped transmission mechanism and a change in the torque converter.

The present invention is a control device for an automatic transmission, the control device being adapted to control the automatic transmission including a torque converter and a stepped transmission mechanism provided on a power transmission route from the torque converter to drive wheels, wherein while a non-driving range of the automatic transmission is selected, determination on interlock in the stepped transmission mechanism is executed on the basis of deceleration of an output shaft of the stepped transmission mechanism and a change in the torque converter.

A vehicle drive device includes: a rotating electrical machine; a speed change mechanism including an input member and an output member drivingly connected to wheels, and configured to change a speed ratio between the input member and the output member; a friction engagement device interposed between the rotating electrical machine and the input member and including a friction engagement element configured to connect and disconnect power transmission between the rotating electrical machine and the input member as an engagement pressure is supplied and discharged; and a control device that controls the rotating electrical machine and the friction engagement device. The control device performs learning control when the input member is held stationary and non-rotatable, the learning control being control in which the control device drives the rotating electrical machine while controlling the engagement pressure to an engagement start pressure at which the friction engagement element starts to engage, and learns the engagement start pressure based on a change in driving state of the rotating electrical machine at the time the friction engagement element starts to engage.

A shift level selection device comprising: a setting unit that sets a selection range in which the lowest speed shift level is a first shift level used in a set-off shift level among two or more shift levels; and a changing unit that, in accordance with the first shift level used in the set-off shift level, changes the selection range so that the lowest speed shift level is a second shift level, which is a lower speed than the first shift level.