System and Method of Torque Transmission Using an Electric Energy Conversion Device
First Claim
1. A hybrid vehicle propulsion system comprising:
- an internal combustion engine;
a torque converter including a lockup clutch, the torque converter receiving torque from at least the internal combustion engine;
a multiple fixed-ratio transmission having an input and an output, the input coupled to the torque converter;
a electric energy conversion device coupled downstream of the multiple fixed-ratio transmission output; and
a control system for adjusting torque output of the hybrid propulsion system, the control system adjusting torque output of the electric energy conversion device to reduce a transmission output torque load and adjusting the multiple fixed ratio transmission to cause a transition in torque transfer responsive to adjusted torque output of the electric energy conversion device.
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Abstract
A hybrid vehicle propulsion system including, an internal combustion engine, a torque converter including a lockup clutch, the torque converter receiving torque from at least the internal combustion engine, a multiple fixed-ratio transmission having an input and an output, the input coupled to the torque converter, a electric energy conversion device coupled downstream of the multiple fixed-ratio transmission output, and a control system for adjusting torque output of the hybrid propulsion system, the control system adjusting torque output of the electric energy conversion device to reduce a transmission output torque load and adjusting the multiple fixed ratio transmission to cause a transition in torque transfer responsive to adjusted torque output of the electric energy conversion device.
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Citations
20 Claims
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1. A hybrid vehicle propulsion system comprising:
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an internal combustion engine; a torque converter including a lockup clutch, the torque converter receiving torque from at least the internal combustion engine; a multiple fixed-ratio transmission having an input and an output, the input coupled to the torque converter; a electric energy conversion device coupled downstream of the multiple fixed-ratio transmission output; and a control system for adjusting torque output of the hybrid propulsion system, the control system adjusting torque output of the electric energy conversion device to reduce a transmission output torque load and adjusting the multiple fixed ratio transmission to cause a transition in torque transfer responsive to adjusted torque output of the electric energy conversion device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A hybrid vehicle propulsion system comprising:
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an internal combustion engine coupled to a first electric energy conversion device; a torque converter having an input and an output, the input coupled to at least one the internal combustion engine and the first electric energy conversion device; a multiple fixed-ratio transmission having an input and an output, the input coupled to the torque converter output; a second electric energy conversion device coupled downstream of the multiple fixed-ratio transmission output; and a control system for the hybrid propulsion system, the control system directing engine output torque between a first propulsion path and a second different propulsion path, the first propulsion path including at least one of the first electric energy conversion device and the second electric energy conversion device and the second propulsion path including at least the transmission input, and adjusting at least one of a torque transfer ratio of the mixed fixed-ratio transmission and a state of the torque converter as the torque transfer between the first and second propulsion paths varies. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method of adjusting torque output of a hybrid propulsion system, the hybrid propulsion system including an internal combustion engine, a torque converter having an input and an output, the internal combustion engine coupled to the input of the torque converter, a multiple fixed-ratio transmission having and input and an output, input of the internal combustion engine coupled to the output of the torque converter, and an electric energy conversion device coupled downstream of the output of the multiple fixed-ratio transmission, the method comprising:
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adjusting the state of the torque converter to at least one of a locked and unlocked state upon a first condition; and adjusting the state of the torque converter to the at least one of a locked and unlocked state upon a second condition different from the first condition, wherein the first condition and the second condition differ based on torque output of the electric energy conversion device. - View Dependent Claims (17, 18, 19, 20)
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Specification