A system includes a computer including a processor and a memory, the memory storing instructions executable by the processor to plan a plurality of vehicle speeds for an upcoming road segment, adjust one or more of the planned speeds based on a predicted torque loss including a penalty based on a predicted torque impeller speed, and actuate a propulsion according to the planned speeds to lock a torque converter clutch.

A method is provided to control a hybrid powertrain, comprising a combustion engine; a gearbox with an input shaft connected to the combustion engine and an output shaft; a first planetary gear connected to the input shaft a second planetary gear connected to the first planetary gear; first and second electrical machines respectively connected to the first and second planetary gears; first gear pair connected with the first planetary gear and the output shaft; and second gear pair connected with the second planetary gear and the output shaft. The method comprises: a) engaging gears corresponding to the first gear pair and to the second gear pair; and b) connecting a second sun wheel, arranged in the second planetary gear and a second planetary wheel carrier with each other, with the use of a second coupling device.

Drive mechanism (1) for a motor vehicle (6), comprising a dual clutch transmission (10) that includes a first powertrain (13), which can be connected to a first drive unit (2) via a first clutch (21), and a second powertrain (14), which can be connected to the first drive unit (2) via a second clutch (22), the first powertrain (13) being securely coupled to a second drive unit (3); when shifting gears in the dual clutch trans-mission (10), the second drive unit (3) supplies a predefined drive torque.

A control apparatus for a vehicle includes an electronic control unit that is configured to set a value of a target generated voltage of the generator. The electronic control unit is configured to execute power generation control to control a generated voltage of a generator. The electronic control unit is configured to maintain a value of the generated voltage in the power generation control to be constant during an upshift gear change when the upshift gear change control of a transmission is executed while the lock-up clutch control is executed during deceleration of the vehicle. The electronic control unit is configured to increase the value in the power generation control during the downshift control to the value of the target generated voltage at a first specified rate when a downshift gear change of the transmission is executed while the lock-up clutch control is executed during the deceleration.

A system and method of controlling engine clutch engagement during TCS operation of a hybrid vehicle are provided. The method includes determining whether a TCS is operating and upon determining that the TCS is operating, determining a compensation value for early engagement of an engine clutch during the TCS operation based on a difference between a front wheel speed and a rear wheel speed and a slip amount of front wheels. Additionally, the method includes determining whether engagement of the engine clutch is capable of being started based on the compensation value and starting the engine clutch engagement. Since the engagement of the engine clutch is controlled based on the speed of non-drive wheels during TCS operation, the engagement stability of the engine clutch is improved and the amount of time required to engage the engine clutch is decreased.

A vehicle includes a first power transmission path, a second power transmission path, and a first clutch provided in the first transmission path to select a connection state between a first connecting state and a first disconnecting state. A second clutch is provided in the second power transmission path to select a connection state between a second connecting state and a second disconnecting state. Circuitry is configured to control the first clutch and the second clutch such that the second clutch switches to the second disconnecting state when a vehicle speed of the vehicle is larger than a first vehicle speed threshold value in a case where the first clutch switches to the first connecting state so as to transmit the power from an internal combustion engine to a wheel and where the second clutch switches to the second connecting state.

A vehicle includes a powertrain and a controller. The powertrain includes a transmission torque converter having a bypass clutch disposed between an electric machine and a drive wheel. The controller is programmed to adjust a closed-state torque capacity of the bypass clutch according and in proportion to the greater in absolute value of a negative impeller torque command to the torque converter and a negative regenerative braking torque request.

A hybrid vehicle includes an engine, an electric machine selectively coupled to the engine, a transmission having a torque converter impeller coupled to the electric machine and a torque converter clutch configured to selectively couple the impeller to a turbine, and a controller configured to control pressure of the torque converter clutch responsive to estimated clutch capacity, which is adjusted by the controller to equal impeller torque responsive to impeller speed exceeding turbine speed during clutch disengagement. A model of estimated torque converter clutch capacity may be stored in memory and adapted to actual clutch capacity by applying a gain or offset determined during opening of the clutch.

The invention relates to a method for increasing the availability of a hybrid separating clutch in a hybrid drive train of a motor vehicle, wherein the hybrid separating clutch is disposed between an internal combustion engine and an electric traction drive. In the method where even in the event of a fault the motor vehicle continues to be driven, the hybrid separating clutch is controlled by a hydrostatic actuator, and when a malfunction of the hydrostatic actuator is detected, for actuation of the hybrid separating clutch which is engaged in the non-actuated state, the last state of the hydrostatic actuator detected by a control mechanism is used for estimation of a minimum clutch torque which can be transmitted.

Four Wheel Drive (4WD) powertrain configurations for hybrid electric vehicles (HEV) and plug-in hybrid electric vehicles (PHEV) are disclosed herein. One powertrain comprises: a prime mover; an electric motor-generator, said electric motor-generator mechanically coupled to said prime mover via a first clutch; an electric motor, said electric motor mechanically coupled to said electric motor-generator via a second clutch; a battery, said battery electrically coupled to said electric motor-generator and said electric motor, said battery capable of supplying electrical energy to said electric motor-generator and said electric motor; and a controller, said controller capable of supplying control signals to said prime mover, said first clutch, said electric motor-generator, said second clutch and said electric motor such that said controller is capable of dynamically affecting a plurality of operating modes; wherein further said plurality of operating modes comprises one of a group, said group comprising: all electric mode, series mode, series-parallel mode and parallel mode.