Abstract: A regulator valve regulates pressure of transmission fluid applied to a clutch of a transmission and a flow rate of the transmission fluid from the regulator valve to a transmission fluid sump. A transmission fluid pump is driven by an engine of the vehicle. A control module, while an ignition system of the vehicle is ON, selectively shuts down the engine of the vehicle for an auto-stop event. A target pressure module, before an engine speed reaches zero for the auto-stop event, increases a target value of a pressure of the transmission fluid at an output of the transmission fluid pump. A regulator control module, before the engine speed reaches zero for the auto-stop event and based on the increase in the target value of the pressure, adjusts the regulator valve to increase the pressure of the transmission fluid at the output of the transmission fluid pump.

Abstract: A vehicle includes an engine, a transmission, and an electrical system. The electrical system has an auxiliary starter motor connected to a crankshaft of the engine, a high-voltage motor generator unit (MGU) connected to the crankshaft, and a controller. Execution of instructions by a processor causes the controller to determine a set of powertrain conditions in response to a requested autostart of the engine, e.g., state of charge and/or power limits of a high-voltage energy storage system (HV-ESS), torque limits of the MGU, and/or a crank angle of the engine. The controller determines whether the requested autostart may not succeed relative to a time or noise standard using the set of powertrain conditions, and transmits an autostart command to the MGU when the requested autostart may succeed. The controller transmits the autostart command to the auxiliary starter motor when the requested autostart will not succeed.

Abstract: A regulator valve regulates pressure of transmission fluid applied to a clutch of a transmission and a flow rate of the transmission fluid from the regulator valve to a transmission fluid sump. A transmission fluid pump is driven by an engine of the vehicle. A control module, while an ignition system of the vehicle is ON, selectively shuts down the engine of the vehicle for an auto-stop event. A target pressure module, before an engine speed reaches zero for the auto-stop event, increases a target value of a pressure of the transmission fluid at an output of the transmission fluid pump. A regulator control module, before the engine speed reaches zero for the auto-stop event and based on the increase in the target value of the pressure, adjusts the regulator valve to increase the pressure of the transmission fluid at the output of the transmission fluid pump.

Abstract: A vehicle includes an engine, a transmission, and an electrical system. The electrical system has an auxiliary starter motor connected to a crankshaft of the engine, a high-voltage motor generator unit (MGU) connected to the crankshaft, and a controller. Execution of instructions by a processor causes the controller to determine a set of powertrain conditions in response to a requested autostart of the engine, e.g., state of charge and/or power limits of a high-voltage energy storage system (HV-ESS), torque limits of the MGU, and/or a crank angle of the engine. The controller determines whether the requested autostart may not succeed relative to a time or noise standard using the set of powertrain conditions, and transmits an autostart command to the MGU when the requested autostart may succeed. The controller transmits the autostart command to the auxiliary starter motor when the requested autostart will not succeed.

Abstract: A method of controlling a pump supplying a fluid to a transmission includes sensing a requested power and an excess power for a powertrain. The requested power substantially meets the needs of the powertrain, while the excess power is not part of the requested power. The method includes sensing a triggering condition in response to the ability to convert the excess power into heat in the transmission, and determining that an operating temperature of the transmission is below a maximum. The method also includes determining a calibrated baseline and a dissipation command for the pump. The calibrated baseline command is configured to supply the fluid based upon the requested power, and the dissipation command is configured to supply additional fluid and consume the excess power with the pump. The method operates the pump at a combined command, which is equal to the calibrated baseline command plus the dissipation command.

Abstract: A method minimizes driveline disturbances in a vehicle having a motor generator unit (MGU) and a controller, which may be a motor control processor or a hybrid control processor. The method includes determining a set of motor values of the MGU, including a change in motor speed, a derivative of the change in motor speed, and a motor jerk value; calculating a corrective final torque value for the MGU as a function of the set of motor values; and commanding the corrective final torque value from the MGU during a predetermined event, e.g., engine restart. Calculations and commanding the corrective final torque value are conducted by the controller within a calibrated minimum processing loop time. A vehicle includes first and second MGUs, and a controller electrically connected to the second MGU. The controller has the algorithm for minimizing driveline disturbances as noted above.

Abstract: A method of controlling a pump supplying a fluid to a transmission includes sensing a requested power and an excess power for a powertrain. The requested power substantially meets the needs of the powertrain, while the excess power is not part of the requested power. The method includes sensing a triggering condition in response to the ability to convert the excess power into heat in the transmission, and determining that an operating temperature of the transmission is below a maximum. The method also includes determining a calibrated baseline and a dissipation command for the pump. The calibrated baseline command is configured to supply the fluid based upon the requested power, and the dissipation command is configured to supply additional fluid and consume the excess power with the pump. The method operates the pump at a combined command, which is equal to the calibrated baseline plus the dissipation commands.

Abstract: A transmission configured for receiving power from an engine is provided with a normally-closed clutch in order to permit operation in modes requiring closure of the clutch even when hydraulic power from a pump powered by the engine or by rotation of a transmission member is not available, or is not of a sufficient pressure.

Abstract: A method of controlling a hybrid powertrain having an electric machine and an engine is provided. The method includes determining a requested power and an excess power for the hybrid powertrain. The requested power substantially meets the needs of the hybrid powertrain. The excess power is non-zero and is not included in the determined requested power. The method also includes absorbing the excess power with the electric machine.

Abstract: A method of controlling an auxiliary pump for use with a transmission in a vehicle is provided, the vehicle having a system voltage/current. The method comprises: determining an optimal auxiliary pump start voltage/current; determining if the system voltage/current is less than the optimal auxiliary pump start voltage/current; if yes, determining if the auxiliary pump is in a start-mode and if a predetermined override condition has been met; determining if the actual auxiliary pump speed is less than a desired auxiliary pump speed if the auxiliary pump is in the start-mode; if not, determining if the auxiliary pump is in an on-state; and, increasing an actual auxiliary pump voltage/current to equal the optimal auxiliary pump start voltage/current if the actual auxiliary pump speed is less than the desired auxiliary pump speed or the predetermined override condition has been met.

Abstract: A method for controlling an inverter coupled to an electric motor for a vehicle includes generating a discontinuous PWM signal for the inverter when a torque of the electric motor and a speed of the electric motor are substantially zero, and when at least one predetermined vehicle condition is met.

Abstract: A method minimizes driveline disturbances in a vehicle having a motor generator unit (MGU) and a controller, which may be a motor control processor or a hybrid control processor. The method includes determining a set of motor values of the MGU, including a change in motor speed, a derivative of the change in motor speed, and a motor jerk value; calculating a corrective final torque value for the MGU as a function of the set of motor values; and commanding the corrective final torque value from the MGU during a predetermined event, e.g., engine restart. Calculations and commanding the corrective final torque value are conducted by the controller within a calibrated minimum processing loop time. A vehicle includes first and second MGUs, and a controller electrically connected to the second MGU. The controller has the algorithm for minimizing driveline disturbances as noted above.

Abstract: A transmission configured for receiving power from an engine is provided with a normally-closed clutch in order to permit operation in modes requiring closure of the clutch even when hydraulic power from a pump powered by the engine or by rotation of a transmission member is not available, or is not of a sufficient pressure.

Abstract: A method of controlling an auxiliary pump for use with a transmission in a vehicle is provided, the vehicle having a system voltage/current. The method comprises: determining an optimal auxiliary pump start voltage/current; determining if the system voltage/current is less than the optimal auxiliary pump start voltage/current; if yes, determining if the auxiliary pump is in a start-mode and if a predetermined override condition has been met; determining if the actual auxiliary pump speed is less than a desired auxiliary pump speed if the auxiliary pump is in the start-mode; if not, determining if the auxiliary pump is in an on-state; and, increasing an actual auxiliary pump voltage/current to equal the optimal auxiliary pump start voltage/current if the actual auxiliary pump speed is less than the desired auxiliary pump speed or the predetermined override condition has been met.