Abstract: A system for operating a dual clutch transmission, including launch/creep controller, shift logic, and a clutch control assembly. The shift logic is configured to intercept a torque command including a target clutch torque from the launch/creep controller as it transmits the target clutch torque to the clutch assembly. The shift logic engages a preparation phase that increases torque on an on-coming clutch to a prefill torque. The shift logic then engages a torque phase that transfers torque between the off-going clutch and the on-coming clutch by simultaneously decreasing the off-going clutch torque and increasing the on-coming clutch torque. The off-going clutch and the on-coming clutch remain in a slipping state that maintains the target clutch torque during the transfer.

Abstract: A transmission control device for a vehicle that includes a controller configured to calculate a first transmission torque based on a first set of inputs, calculate a second transmission torque based on a second set of inputs, determine whether a brake pedal is applied, and apply either the first transmission torque or the second transmission torque based on whether the brake is applied.

Abstract: A method of operating a vehicle powertrain system where the powertrain system includes a fuel controlled engine, an electric motor, and a battery, the fuel, controlled engine and the electric motor capable of powering the powertrain system. The powertrain system is capable of operating in a plurality of operational modes. The method includes detecting a current value representative of a current flowing through a portion of the battery, calculating a first value representative of the current over a predetermined amount of time, and de-rating at least one of the plurality of operational modes in response to the calculated first value.

Abstract: A system for operating a dual clutch transmission, including launch/creep controller, shift logic, and a clutch control assembly. The shift logic is configured to intercept a torque command including a target clutch torque from the launch/creep controller as it transmits the target clutch torque to the clutch assembly. The shift logic engages a preparation phase that increases torque on an on-coming clutch to a prefill torque. The shift logic then engages a torque phase that transfers torque between the off-going clutch and the on-coming clutch by simultaneously decreasing the off-going clutch torque and increasing the on-coming clutch torque. The off-going clutch and the on-coming clutch remain in a slipping state that maintains the target clutch torque during the transfer.

Abstract: A transmission control device for a vehicle that includes a controller configured to calculate a first transmission torque based on a first set of inputs, calculate a second transmission torque based on a second set of inputs, determine whether a brake pedal is applied, and apply either the first transmission torque or the second transmission torque based on whether the brake is applied.

Abstract: A method of determining a torque transfer touch point of a clutch within a drive train includes applying a predetermined amount of current to an electric motor such that the electric motor will apply a torque to at least a portion of a clutch. The predetermined amount of current will not rotate a shaft of the motor when the clutch is at least partially engaged. The method also includes initiating disengagement of the clutch, detecting movement of at least a portion of the motor, and recording a clutch parameter that is generally coincident with the detecting movement of a least a portion of the motor.

Abstract: A method of operating a vehicle powertrain system where the powertrain system includes a fuel controlled engine, an electric motor, and a battery, the fuel, controlled engine and the electric motor capable of powering the powertrain system. The powertrain system is capable of operating in a plurality of operational modes. The method includes detecting a current value representative of a current flowing through a portion of the battery, calculating a first value representative of the current over a predetermined amount of time, and de-rating at least one of the plurality of operational modes in response to the calculated first value.

Abstract: A method of operating a vehicle powertrain system where the powertrain system includes a fuel controlled engine, an electric motor, and a battery, the fuel, controlled engine and the electric motor capable of powering the powertrain system. The powertrain system is capable of operating in a plurality of operational modes. The method includes detecting a current value representative of a current flowing through a portion of the battery, calculating a first value representative of the current over a predetermined amount of time, and de-rating at least one of the plurality of operational modes in response to the calculated first value.

Abstract: A method of operating a parallel hybrid electric drive train may include manually selecting a first mode by a user. The first mode include an electric mode that provides for propelling a vehicle using only an electric motor. The method may also include propelling the vehicle in the electric mode, limiting an allowed vehicle acceleration below a predetermined acceleration value, detecting a battery state of charge, and preventing an engine start during operation in the electric mode.

Abstract: An exemplary transmission system includes a plurality of sensors each configured to output a signal at least partially representative of a speed of at least one of a first transmission input shaft, a second transmission input shaft, a transmission output shaft, and an engine. A transmission control module is in communication with the plurality of sensors and is configured to identify at least one of the plurality of sensors as a failed sensor and another of the plurality of sensors as a working sensor. The transmission control module is further configured to estimate the signal of the failed sensor based on a predetermined relationship between an expected signal from the failed sensor and the signal received from the working sensor.

Abstract: A method of engaging a clutch within a drive train may include detecting a fault in a clutch engagement data link, selecting an alternative clutch control logic, detecting a value indicative of a rotational speed of a first portion of the clutch and moving a second portion of the clutch based upon the detected value.

Abstract: A method of operating a vehicle powertrain system where the powertrain system includes a fuel controlled engine, an electric motor, and a battery, the fuel, controlled engine and the electric motor capable of powering the powertrain system. The powertrain system is capable of operating in a plurality of operational modes. The method includes detecting a current value representative of a current flowing through a portion of the battery, calculating a first value representative of the current over a predetermined amount of time, and de-rating at least one of the plurality of operational modes in response to the calculated first value.

Abstract: An exemplary transmission system includes a plurality of sensors each configured to output a signal at least partially representative of a speed of at least one of a first transmission input shaft, a second transmission input shaft, a transmission output shaft, and an engine. A transmission control module is in communication with the plurality of sensors and is configured to identify at least one of the plurality of sensors as a failed sensor and another of the plurality of sensors as a working sensor. The transmission control module is further configured to estimate the signal of the failed sensor based on a predetermined relationship between an expected signal from the failed sensor and the signal received from the working sensor.