ELECTRICALLY-VARIABLE ACCESSORY DRIVE FOR ENGINE START
First Claim
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1. A method for controlling operation of an internal combustion engine mechanically coupled via a planetary gear set to an accessory drive system and a torque machine, the method comprising:
- monitoring operator inputs;
monitoring engine operation parameters; and
controlling the accessory drive system in response to the operator inputs and the engine operation parameters in one of a plurality of operational states, comprisingan engine autostop accessory control state including operating the torque machine in a torque generating state and transferring the generated torque to the accessory drive,an engine autostart state including operating the torque machine in the torque generating state and transferring the generated torque to the engine,an engine torque assist state including operating the torque machine in the torque generating state and transferring the generated torque to the engine, andan energy power generation state including operating the torque machine in a power generating state to react engine torque.
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Abstract
A hybrid powertrain system includes an internal combustion engine mechanically coupled through a planetary gear set to an accessory drive and a torque machine. Operator inputs and engine operating parameters are monitored to select an operational state including one of an autostop accessory control state, autostart operation state, engine torque assist state, and energy power generation state.
8 Citations
16 Claims
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1. A method for controlling operation of an internal combustion engine mechanically coupled via a planetary gear set to an accessory drive system and a torque machine, the method comprising:
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monitoring operator inputs; monitoring engine operation parameters; and controlling the accessory drive system in response to the operator inputs and the engine operation parameters in one of a plurality of operational states, comprising an engine autostop accessory control state including operating the torque machine in a torque generating state and transferring the generated torque to the accessory drive, an engine autostart state including operating the torque machine in the torque generating state and transferring the generated torque to the engine, an engine torque assist state including operating the torque machine in the torque generating state and transferring the generated torque to the engine, and an energy power generation state including operating the torque machine in a power generating state to react engine torque. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for controlling operation of an internal combustion engine mechanically coupled via a planetary gear set to an accessory drive system and a torque machine, wherein the accessory drive system includes an accessory brake, the method comprising:
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monitoring operator inputs; monitoring engine operation parameters; selecting one of a plurality of operational states for operating the engine, the accessory drive system, and the torque machine in response to the operator inputs and the engine operation parameters; and operating the engine, the accessory drive system, and the torque machine in the selected operational state to control speed of accessories included in the accessory drive. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification