Systems and methods for operating a hybrid vehicle during an end of assembly line test are presented. In one example, torque of an integrated starter/generator (ISG) is adjusted so that the ISG may not affect engine data that is collected during end of assembly line engine testing. The collected engine data may be a basis for adapting engine operation.

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.

An apparatus for preventing rolling of a vehicle operating in an automatic vehicle hold mode includes a reset determination unit configured to determine whether an automatic hold controller controlling an operation of the automatic vehicle hold mode has been reset, a mode determination unit configured to determine whether a mode of the vehicle is the automatic vehicle hold mode when it is determined that the automatic hold controller has been reset, and a vehicle control unit configured to brake the vehicle, based on at least one of a gear position, an opening degree of an accelerator pedal, and whether a brake pedal is operated, when it is determined that the mode of the vehicle is the automatic vehicle hold mode.

A controller for a vehicle is provided. The vehicle includes an engine, a rotary machine, at least one driving wheel, a first clutch disposed between a power transmission member and the rotary machine, the power transmission member being disposed between the engine and the driving wheel, the first clutch being configured to be switched to an engaged state or a disengaged state, and a second clutch disposed in parallel with the first clutch, the second clutch being a one-way clutch. The controller includes an electronic control unit. The electronic control unit is configured to control at least one of the rotary machine or the first clutch so as to reduce inertia of the power transmission member based on a torsional load acting on the power transmission member.

A control device for a vehicle is provided. The control device includes an electronic control unit that is configured to: exert the torque of an input member on a fixed member and a rotating member such that the fixed member and the rotating member are separated from each other, when the thrust is exerted for making the engagement teeth mesh with each other; estimate an inclination angle of tooth surfaces based on a relative movement amount between the fixed member and the rotating member, and a relative rotational amount between the fixed member and the rotating member; estimate a frictional coefficient of the tooth surfaces based on the inclination angle; and control the thrust of the actuator according to the frictional coefficient.

Methods and systems are provided for operating a driveline of a hybrid vehicle that includes an internal combustion engine, an electric machine, and a transmission are described. In one example, the engine is started and coupled to the driveline via closing a clutch of a dual clutch transmission. Speed of the engine and clutch pressure are controlled to reduce driveline torque disturbances and provide a desired wheel torque.

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.

Methods and systems are provided for operating a driveline of a hybrid vehicle powertrain, where the driveline includes an electric machine downstream of a dual clutch transmission, which is downstream of an engine. In one example, a method comprises communicating from a transmission, a torque to accelerate transmission components from a first speed to a second speed with first and second clutches of a dual transmission open, the communicating performed while an electric machine coupled to the dual clutch transmission at a location downstream of the dual clutch transmission is providing torque to propel a vehicle. In this way, wheel speed may remain substantially constant while the transmission is shifted and the engine is stopped.

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.

Methods and systems are provided for entering into a parked state in a hybrid electric vehicle that includes a dual clutch transmission. In one example, a driveline operating method comprises in response to a first condition, engaging a first gear and engaging a second gear of a dual clutch transmission in response to a request to enter a vehicle park state where an output of a transmission is held from rotating, and in response to a second condition, engaging a third gear and engaging a fourth gear of a dual clutch transmission in response to a request to enter a vehicle park state. In this way, a park state may be entered into without the use of a park pawl, which may reduce costs associated with the vehicle and which may prevent issues associated with degradation of the park pawl.