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.

Systems and methods for controlling a park pawl system of a hybrid vehicle having a hybrid powertrain comprising an engine and a hybrid transmission comprising at least one electric propulsion motor, the systems and methods each utilizing a control system configured to detect, using a main control system portion, a desired park state based on at least an input via a transmission gear selector and an input via a brake pedal and detect, using a distinct monitoring system portion, whether the desired park state is valid based on at least the transmission gear selector and brake pedal inputs. When the desired park state is valid, the control system commands the park pawl system to the desired park state. When the desired park state is invalid, however, the control system commands an electric park brake of the vehicle to prevent movement at a driveline of the vehicle.

A vehicle control method includes, by a controller, while an engine is auto-stopped and an electric parking brake is engaged, auto-starting the engine without releasing the electric parking brake responsive to application of an accelerator pedal less than a predefined amount, and auto-starting the engine and releasing the electric parking brake responsive to application of the accelerator pedal greater than the predefined amount. The method also includes comprising auto-stopping the engine and engaging the electric parking brake responsive to vehicle speed being less than a predefined threshold speed.

Noise and vibration occurring when a parking lock is released can be efficiently reduced in the hybrid vehicle which includes an internal combustion engine and an electric motor serving as the driving sources and a stepped type transmission divided into two systems of a shift shaft at an odd shift stage side and a shift shaft at an even shift stage side. A 2-speed stage is selected as a pre-shift stage set when a meshing member is meshed with a parking lock gear and a parking lock mechanism has a parking lock state. The 2-speed driving gear is joined to an output shaft using a second engagement switching mechanism in a state in which the 2-speed stage is set as the pre-shift stage so that a larger inertial mass can be secured as an inertial mass of a parking lock gear and members joined to an output shaft.

A method includes controlling an electrified vehicle by automatically engaging a braking device if the electrified vehicle is in park and an engine start or stop request has been received. Controlling the electrified vehicle includes preventing a brake lamp from illuminating during engagement of the braking device.

A vehicle controller applies a braking force to wheels using a hydraulic braking force generating mechanism and sets a vehicle driving torque, which is generated by an engine, to a second torque which is smaller than a first torque in a normal state, when a switch is switched to an ON state in a state in which a vehicle is traveling and an accelerator is turned on. Then vehicle stops, the vehicle controller implements an EPB mechanical operating state using a mechanical parking brake mechanism. When the switch is switched to an OFF state, the vehicle controller maintains the EPB mechanical operating state until an accelerator pedal operating level reaches 0, and maintains the vehicle driving torque at the second torque. Then the accelerator pedal operating level reaches 0, the EPB mechanical operating state is released and the vehicle driving torque is returned to the first torque.

A shift range is selected based on a vehicle speed or acceleration of a vehicle and a shift range kept by a drive unit at the time when it is determined that there is a malfunction in shift sensors. Thus, it is possible to avoid a disabled self-propelled state resulting from a change into a neutral range through a fail-safe operation and keep limp home running.

An automatic transmission includes a park rod adapted to non-rotatably lock an output shaft of the automatic transmission, an actuator adapted to drive the park rod, and an ATCU adapted to drive the actuator when a setting range of the automatic transmission is set into a P range. In a situation where an accelerator pedal is pressed on a climbing slope, driving force and gradient resistance are balanced, and a vehicle is stopped, the ATCU does not set the setting range of the automatic transmission into the P range even when a shifter is operated into the P range.

A system includes a computer including a processor and a memory, the memory storing instructions executable by the computer to operate a component in a vehicle in an autonomous mode, detect an impact to the vehicle, and then actuate any of a propulsion, a brake, and a steering only according to user input.

A transmission park mechanism is hydraulically actuated. Specifically a controller releases the parking pawl by commanding engagement of particular shift elements at an elevated line pressure. The process of transitioning from Park to a Drive or Reverse condition may involve several sequential steps. To reduce the delay between driver selection of Drive or Reverse and completion of the engagement, it is advantageous to raise the line pressure in response to depression of a brake pedal, prior to movement of the shift lever. To limit the adverse fuel economy impact of increased line pressure, the line pressure is lowered again if the driver does not move the shift lever soon after depressing the brake pedal.