摘要:
Methods and systems for managing acceleration of a motor vehicle having an automatic transmission (10) by controlling transmission turbine acceleration are provided. A desired transmission turbine acceleration (VAC) is determined based on vehicle speed (VS), turbine speed (TS), and other information obtained from the vehicle transmission (10). One or more torque limits are determined as a function of the turbine acceleration. The torque limits are applied to manage acceleration of the vehicle.
摘要:
A hybrid powertrain system includes an internal combustion engine (14) operatively connected to a second torque machine (72) to transmit torque to an output member (64). A method for operating the hybrid powertrain system includes monitoring an operator torque request, determining an output torque command based upon the operator torque request, commanding a transition between an engine-off state and an engine-on state, monitoring an engine crank angle, spinning the engine unfueled, estimating cylinder pressure based upon the engine crank angle during the spinning of the engine (14), predicting a cylinder pulse torque based upon the cylinder pressure, determining a cancellation torque for the second torque machine (72) based upon the predicted cylinder pulse torque, and controlling motor torque output from the second torque machine (72) based upon the cancellation torque and the output torque command.
摘要:
A control apparatus of a hybrid vehicle provided with an engine (E), a motor (MG), an automatic transmission (AT) performing a shift by engaging/disengaging a plurality of engagement elements, a first clutch (CL1) arranged between the engine (E) and the motor (M) for transmitting/cutting a driving force between the engine (E) and the motor (M) and a second clutch (CL2) arranged between the motor (M) and driving wheels (RL, RR) for transmitting/cutting a driving force from the motor (M) to the driving wheels (RL, RR), has a slip control section (400) that controls the second clutch (CL2) to a slip state during the shift of the automatic transmission (AT). In a case of a successive shift in which a current shift and a succeeding shift are successively performed, the slip control section gradually increases an engagement pressure of the second clutch (CL2) when changing the slip state of the second clutch (CL2) to a fully engaged state after the current shift is completed and before the succeeding shift is completed.
摘要:
A powertrain includes an electro-mechanical transmission (10) mechanically-operatively coupled to an internal combustion engine (14) and an electric machine (56,72) to selectively transmit mechanical power to an output member (64). Powertrain operation includes monitoring operator inputs, and determining input speeds and changes in input speeds for the internal combustion engine (14) and the electric machine (56,72). The input speeds are compared to threshold input speeds, and the changes in input speeds are compared to threshold changes in input speeds. Input torques of the internal combustion engine (14) and the electric machine (56,72) are reduced when any one of the input speeds and changes in input speeds exceeds the corresponding threshold.
摘要:
A powertrain system includes a hybrid transmission device (10) operative to transfer power between an input member (12) and torque machines (56,72) and an output member (64) in one of a plurality of operating range states. The torque machines (56,72) are connected to an energy storage device (74). A method for operating the powertrain system includes determining a permissible range of input operating points to the input member (12), determining ranges of motor torques for the torque machines (56,72), determining an available power range from the energy storage device (74), selecting a candidate input operating point within the permissible range of input operating points, and determining maximum and minimum achievable output torques transferable to the output member (64) for the candidate engine operating point within the ranges of motor torques for the torque machines (56,72) and within the available power range from the energy storage device (74) in a candidate operating range state.
摘要:
An engine (14) and an electric machine (56,72) are operative to communicate tractive power with a transmission device (10) to control output power to an output member (64). The electric machine (56,72) is electrically coupled to an energy storage device (74). A method for controlling the engine (14) and electric machine (56,72) includes monitoring an operator request for power, monitoring a state of charge of the energy storage device (74), determining an operating cost for each of a plurality of candidate engine operating points based on the operator request for power and the state of charge of the energy storage device (74); and operating the engine (14) at the candidate engine operating point having a preferred operating cost.
摘要:
Methods and systems for managing acceleration of a motor vehicle having an automatic transmission by controlling transmission turbine acceleration are provided. A desired transmission turbine acceleration is determined based on vehicle speed, turbine speed, and other information obtained from the vehicle transmission. One or more torque limits are determined as a function of the turbine acceleration. The torque limits are applied to manage acceleration of the vehicle.
摘要:
A powertrain system includes a transmission (10) operative to transfer power between an input member (12) and first (56) and second (72) torque machines and an output member (64). The first (56) and second (72) torque machines are connected to an energy storage device (74) and the transmission (10) is operative in a continuously variable operating range state. A method for controlling the powertrain system includes selecting an independently controllable parameter for the powertrain system, determining maximum and minimum motor torque constraints for the first (56) and second (72) torque machines and determining maximum and minimum power constraints for the energy storage device (74), determining maximum and minimum states for the independently controllable parameter for the powertrain system, and determining an achievable operating range for a parameter of interest based upon the maximum and minimum states for the independently controllable parameter for the powertrain system, the maximum and minimum motor torque constraints for the first (56) and second (72) torque machines and the maximum and minimum power constraints for the energy storage device (74).