Methods and systems are provided for controlling clutch capacity in a hybrid electric vehicle. In one example, a method includes adjusting values of a transfer function of a clutch of a dual clutch transmission in response to an operating condition of an engine and/or operating condition of an integrated starter/generator coupled to the engine while a vehicle is propelled via an electric machine coupled to the dual clutch transmission, and maintaining a driver demand wheel torque at vehicle wheels via adjusting torque of the electric machine in response to the operating condition of the engine and/or operating condition of the integrated starter generator. In this way the method may apply pressure to one of the clutches where engine speed is independently controlled to maintain positive or negative slip, thus enabling adaptation of positive and negative clutch transfer functions, which may improve driveline operation and shift quality.

Air ingestion into a transmission hydraulic system may lead to a number of issues. For example, the time to engage a hydraulically actuated parking mechanism may be excessive. As another example, the pump may not prime properly on a subsequent engine start. The air ingestion issue may be detected based on variability of transmission line pressure. When the line pressure variability exceeds a threshold, actions are taken to mitigate the potential issues.

Methods and systems are provided for adjusting clutch pressures and electric machine torques as a function of a stability metric threshold(s) in order to balance performance and charging of an onboard energy storage device. In one example, a method includes during an upshift of a transmission from a first gear to a second gear, adjusting a clutch pressure of the transmission to adjust slippage of a clutch in response to a vehicle stability control parameter exceeding a threshold. In this way, torque delivered to a transmission output shaft may be reduced, which may increase vehicle stability.

A control device that controls a vehicle drive device provided with a transmission mechanism and a rotating member in a power transmission path in this order from a drive power source side, and provided with a parking lock mechanism that restricts rotation of the rotating member by allowing an engaging member to engage with the rotating member, the power transmission path connecting a drive power source to wheels.

Methods and systems are provided for reducing vehicle movement during standstill. In one example, a method for a hybrid or electric vehicle may include monitoring a requested torque of an electric machine and a clutch position, predicting a torque at an output shaft by multiplying the requested torque and clutch position, and operating the hybrid or electric vehicle in a default state in response to an indication of a predicted torque exceeding a threshold torque.

A method for controlling a motor vehicle having at least one park lock. A drive train of the motor vehicle has a drive motor, wheel, and a transmission. An operating element actuates the park lock, which can assume a blocking position, in which the park lock blocks the drive train and/or a part of the drive train, and a release position. After actuation of the operating element, the park lock is switched from the release position into the blocking position (or vice versa). Here, the speed of the motor vehicle is determined. After actuation of the operating element and if the park lock assumes the release position beforehand, it is checked whether the speed is greater than a predefined first threshold value. If this check was successful, a first warning signal is produced; and the switching of the park lock into the blocking position is performed.

A vehicle comprises an autonomous driving system and a vehicle platform that controls the vehicle in response to a command received from the autonomous driving system. In the present vehicle, when the autonomous driving system issues a first command to request the vehicle platform to provide deceleration to stop the vehicle and a first signal indicates 0 km/h or a prescribed velocity or less, the autonomous driving system issues a second command to request the vehicle platform to maintain stationary. And after brake hold control is finished, a second signal indicates standstill. Until the second signal indicates standstill, the first command continues to request the vehicle platform to provide deceleration.

An electric parking brake device configured to enable switching of a control mode between: a switch operation mode to lock and release electric parking brakes by operation of an electric parking brake switch; and a shift link operation mode to lock and release the electric parking brakes in conjunction with shift operation of a shift lever. The electric parking brake device has a mode selection controller to select the shift link operation mode as the control mode if the switch breakdown determiner determines that the electric parking brake switch is broken down and the brake operation determiner determines that the electric parking brakes are in the locked state.

Methods and systems are provided for launching a vehicle in an electric-only mode of operation. In one example, a driveline operating method comprises engaging a parking pawl to an output shaft of a dual clutch transmission in response to a request to engine a vehicle into a parked state, and disengaging the parking pawl via rotating an engine via an integrated starter/generator in response to a request to propel the vehicle solely via power of an electric machine positioned downstream of the dual clutch transmission. In this way, the vehicle may be launched in the electric-only mode without activating the engine in a fueled mode of operation and then deactivating the engine, which may increase vehicle operator satisfaction and which may improve fuel economy.

A method for operating a motor vehicle, for which it is monitored whether a communication failure is present between a transmission control instrument of an automatic transmission of the motor vehicle, a selector lever control instrument of the automatic transmission, and/or a parking brake control instrument of an electronic parking brake of the motor vehicle, and/or whether, on account of a malfunction of the automatic transmission itself and/or on account of a malfunction of a selector lever itself for selection of drive stages of the automatic transmission, a parking position of the automatic transmission cannot be engaged.