Speed control for an electrically variable transmission
First Claim
1. Speed control for a multi-mode, electromechanical transmission including an input member coupled to a prime mover, at least one planetary gear set, at least one motor, at least one torque transfer device, a plurality of operating states and an output member, comprising:
- an open loop motor torque controller operative to control a preselected transmission speed to a target speed as a predetermined function of preselected transmission torques and accelerations.
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Accused Products
Abstract
A multi-mode hybrid transmission has speed control provided via an open loop model derived as a function of preselected transmission accelerations and controlled and uncontrolled transmission torques. Motor torques are selected as the controlled torques and other preselected transmission torques are selected as the uncontrolled torques. The control also employs a closed loop control effort responsive to at least one preselected transmission speed error.
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Citations
27 Claims
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1. Speed control for a multi-mode, electromechanical transmission including an input member coupled to a prime mover, at least one planetary gear set, at least one motor, at least one torque transfer device, a plurality of operating states and an output member, comprising:
an open loop motor torque controller operative to control a preselected transmission speed to a target speed as a predetermined function of preselected transmission torques and accelerations. - View Dependent Claims (2, 3, 4, 5, 6)
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7. Method for controlling transmission member speed in a multi-mode, electromechanical transmission including an input member coupled to a prime mover, at least one planetary gear set, at least one motor, at least one torque transfer device, a plurality of operating states and an output member, comprising:
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providing a model of the transmission corresponding to an active one of said plurality of operating states, said model including controlled and uncontrolled external torques and preselected transmission accelerations;
providing values for said uncontrolled external torques into the model;
providing values for said preselected transmission accelerations into the model;
solving the model for values of said controlled external torques; and
,applying torque to the transmission in accordance with said values for said controlled external torques. - View Dependent Claims (8, 9, 10, 11)
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12. Method for controlling transmission member speed in a multi-mode, electromechanical transmission including an input member coupled to a prime mover, said transmission further including a pair of planetary gear sets, a pair of motors, a pair of torque transfer devices for selectively activating one of said two modes, and an output member, comprising:
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providing a mode model of the transmission corresponding to an active one of said modes, said mode model including controlled and uncontrolled external torques and preselected transmission accelerations;
providing values for said uncontrolled external torques into the mode model;
providing values for said preselected transmission accelerations into the mode model;
solving the mode model for values of said controlled external torques; and
,applying torque to the transmission in accordance with said values for said controlled external torques. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification