A vehicle control device has a controller configured to control a hydraulic pressure required for shifting of a sub-transmission based on an input torque to the sub-transmission during the coordinated shift, and to execute limitation processing in which, when an instruction to execute specific control causing fluctuation in the input torque to the sub-transmission during the coordinated shift is issued, execution of the specific control is prohibited or the specific control is executed by limiting a control amount.

A vehicle control device has a controller configured to control a hydraulic pressure required for shifting of a sub-transmission based on an input torque to the sub-transmission during the coordinated shift, and to execute limitation processing in which, when an instruction to execute specific control causing fluctuation in the input torque to the sub-transmission during the coordinated shift is issued, execution of the specific control is prohibited or the specific control is executed by limiting a control amount.

Method for engaging and disengaging a hydraulic motor which is adjustable in its displacement from and to a hydrostatic drive train of a hydromechanical transmission with a closed hydraulic fluid circuit. Two adjustable hydraulic motors and a hydraulic pump are arranged in parallel in the hydrostatic drive train and connected to a mechanical drive on the output side. At least one of the two hydraulic motors is connected to the mechanical drive via an assigned clutch. As appropriate to the driving situation, during operation of the other hydraulic motor and the hydraulic pump at least one of the hydraulic motors is engaged via the assigned clutch with the hydromechanical transmission from which the hydraulic motor was previously disengaged, likewise as appropriate to the driving situation. Before closing the clutch, the hydraulic motor to be engaged is accelerated load-free by deflecting its adjustment device in such a way that the rotational speed of an assigned clutch input shaft of the clutch is at least equal to the rotational speed of the clutch output shaft of the clutch which is connected to the mechanical gear. When the clutch is closed, both hydraulic motors act on a common output shaft of the mechanical gear.

Method for engaging and disengaging a hydraulic motor which is adjustable in its displacement from and to a hydrostatic drive train of a hydromechanical transmission with a closed hydraulic fluid circuit. Two adjustable hydraulic motors and a hydraulic pump are arranged in parallel in the hydrostatic drive train and connected to a mechanical drive on the output side. At least one of the two hydraulic motors is connected to the mechanical drive via an assigned clutch. As appropriate to the driving situation, during operation of the other hydraulic motor and the hydraulic pump at least one of the hydraulic motors is engaged via the assigned clutch with the hydromechanical transmission from which the hydraulic motor was previously disengaged, likewise as appropriate to the driving situation. Before closing the clutch, the hydraulic motor to be engaged is accelerated load-free by deflecting its adjustment device in such a way that the rotational speed of an assigned clutch input shaft of the clutch is at least equal to the rotational speed of the clutch output shaft of the clutch which is connected to the mechanical gear. When the clutch is closed, both hydraulic motors act on a common output shaft of the mechanical gear.

To inhibit clutch engagement during an engine restart from affecting cooperative regenerative braking control and switching of braking in a hybrid vehicle having a P2 module onboard, a control system for the hybrid vehicle includes an engine, a motor, a K0 clutch, drive shafts, a hydraulic friction brake system, and a controller capable of performing cooperative regenerative braking control. When start of the engine is requested during the cooperative regenerative braking control, the controller performs a first process of transitioning to braking only by the frictional brake system, a second process of raising an engine revolution speed while engagement of the K0 clutch is initiated after completion of transitioning to the braking, and a third process of controlling the engine to resume operating at a timing after the engine revolution speed increases to match a motor revolution speed after the engagement of the K0 clutch is initiated.

A power split hybrid transmission for a vehicle includes an internal combustion engine (ICE), a first electric motor, a second electric motor, a disconnect element and a controller. The ICE drives an output shaft that is rotatably coupled to a planetary carrier of a planetary gear set. The first electric motor is rotatably coupled to a sun gear of the planetary gear set and provides a first rotatable input to a transmission output shaft. The second electric motor is rotatably coupled to a counter gear that provides a second rotatable input to the transmission output shaft. The disconnect element selectively disconnects rotatable motion from the transmission output shaft to drive wheels. The controller determines whether the ICE, the first electric motor and the second electric motor are disconnected from the drive wheels and commands torque to the first and second electric motors to cooperatively rotate the transmission output shaft.