Abstract: A method for downshifting a vehicle having an automatic transmission is described. In one example, the method determines whether or not conditions are met for a power matching downshift. If conditions are met for a power matching downshift, output power of a powertrain propulsion torque source at an end of the power matching downshift is adjusted to an output power of the powertrain propulsion torque source at the beginning of the power matching downshift plus an offset power.

Abstract: A method for downshifting a vehicle having an automatic transmission is described. In one example, the method determines whether or not conditions are met for a power matching downshift. If conditions are met for a power matching downshift, output power of a powertrain propulsion torque source at an end of the power matching downshift is adjusted to an output power of the powertrain propulsion torque source at the beginning of the power matching downshift plus an offset power.

Abstract: 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, accelerator pedal position provides a basis for requesting vehicle acceleration and vehicle wheel torque is determined from the requested vehicle acceleration.

Abstract: 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, accelerator pedal position provides a basis for requesting vehicle acceleration and vehicle wheel torque is determined from the requested vehicle acceleration.

Abstract: A method to control engine stop-start in a vehicle is provided. The method includes a controller outputting an engine command to auto-start an engine based on detection of shifter position change to one of a first set of shifter positions and whether a first predetermined time threshold has expired following the shifter position change in response to presence of an engine auto-stop mode and one of a set of preselected drive modes. The vehicle may include an engine, a traction battery, and a controller. The traction battery selectively powers components of the vehicle when the engine is auto-stopped. The controller is programmed to, in response to detecting an engine auto-stop condition, one of a set of preselected drive modes, and a shifter position change to one of a first set of shifter positions with a brake application, output an engine command to engage engine auto-start.

Abstract: A vehicle cruise control system includes an ECO-cruise mode such that a rate of acceleration of the vehicle during cruise control is less than or equal to a maximum that is a function of vehicle speed and road grade. Further, the rate is a function of the vehicle speed and a difference between the vehicle and target cruise control speeds.

Abstract: A method for controlling a vehicle driveline having a power source and a transmission clutch includes using a difference between two spaced locations in the subject vehicle driveline to determine driveline twist speed due to applied torque, using a product of driveline twist speed and a sampling interval to produce an estimated driveline twist from the sum of incremental changes in driveline twist that are between predetermined upper and lower magnitudes, producing, in response to a demanded wheel torque, a first signal that controls torque transmitted from the power source to the clutch during a lash crossing using the estimated driveline twist and the current driveline torque; and producing a second signal that controls clutch torque capacity such that clutch slip is produced during the lash crossing.

Abstract: A method for controlling a driveline having a transmission clutch includes locking the clutch before a driveline lash crossing occurs; maintaining a locked clutch during the lash crossing; after the lash crossing occurs, increasing a clutch capacity at a slower rate than a driveline twist torque rate; and after the lash crossing occurs, producing clutch slip by controlling engine torque and clutch capacity such that engine torque exceeds clutch capacity.

Abstract: A method for controlling a driveline having a transmission clutch includes locking the clutch before a driveline lash crossing occurs; maintaining a locked clutch during the lash crossing; after the lash crossing occurs, increasing a clutch capacity at a slower rate than a driveline twist torque rate; and after the lash crossing occurs, producing clutch slip by controlling engine torque and clutch capacity such that engine torque exceeds clutch capacity.