CONTROL SYSTEM FOR ENGINE TORQUE MANAGEMENT FOR A HYBRID POWERTRAIN SYSTEM
First Claim
1. Method for controlling an engine mechanically coupled to a transmission device, the transmission device operative to transfer mechanical power between the engine and a second power generating device and an output member, the method comprising:
- monitoring an operator demand for power;
selecting a preferred engine state;
determining a preferred engine torque input to the transmission device when operating in the preferred engine state based upon the operator demand for power;
determining constraints on the engine torque input to the transmission device based upon a capacity of the transmission device to react the engine torque input; and
commanding operation of the engine to the preferred engine state and commanding the engine torque input to the transmission device based upon the preferred engine torque input and the constraints on the engine torque input.
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Accused Products
Abstract
An engine is mechanically coupled to a transmission device, the transmission device operative to transfer mechanical power between the engine and a second power generating device and an output member. A method for controlling the engine includes monitoring an operator demand for power, selecting a preferred engine state, determining a preferred engine torque input to the transmission device when operating in the preferred engine state based upon the operator demand for power, determining constraints on the engine torque input to the transmission device based upon a capacity of the transmission device to react the engine torque input, and commanding operation of the engine to the preferred engine state and commanding the engine torque input to the transmission device based upon the preferred engine torque input and the constraints on the engine torque input.
190 Citations
18 Claims
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1. Method for controlling an engine mechanically coupled to a transmission device, the transmission device operative to transfer mechanical power between the engine and a second power generating device and an output member, the method comprising:
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monitoring an operator demand for power; selecting a preferred engine state; determining a preferred engine torque input to the transmission device when operating in the preferred engine state based upon the operator demand for power; determining constraints on the engine torque input to the transmission device based upon a capacity of the transmission device to react the engine torque input; and commanding operation of the engine to the preferred engine state and commanding the engine torque input to the transmission device based upon the preferred engine torque input and the constraints on the engine torque input. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. Method for controlling an internal combustion engine mechanically coupled to an electromechanical transmission operative to transfer mechanical power between the engine and an electric machine and an output member, the method comprising:
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monitoring an operator demand for tractive power; selecting a preferred engine state; determining a preferred engine torque input to the transmission when operating in the preferred engine state based upon the operator demand for tractive power; determining constraints on the engine torque input to the transmission based upon a capacity of the transmission to react the engine torque input; and commanding operation of the engine to the preferred engine state and commanding the engine torque input to the transmission based upon the preferred engine torque input and the constraints on the engine torque input. - View Dependent Claims (14, 15, 16)
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17. Method for controlling an internal combustion engine mechanically coupled to a hybrid transmission including an energy storage device connected to a machine operative to transmit mechanical power to the hybrid transmission, the hybrid transmission operative to transmit mechanical power to an output member, comprising:
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monitoring operator inputs to an accelerator pedal and to a brake pedal; determining power limits of the energy storage device connected to the machine operative to transmit mechanical power to the hybrid transmission; selecting a preferred engine state based upon the operator inputs to the accelerator pedal and to the brake pedal; determining a preferred engine torque input to the hybrid transmission when operating in the preferred engine state based upon the operator inputs to the accelerator pedal and to the brake pedal; determining constraints on the engine torque input to the hybrid transmission based upon a capacity of the hybrid transmission to react the engine torque input; and commanding operation of the engine to the preferred engine state and commanding the engine torque input to the hybrid transmission based upon the preferred engine torque input and the constraints on the engine torque input. - View Dependent Claims (18)
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Specification