Hybrid powertrain
First Claim
1. A hybrid powertrain comprising:
- an input member;
an output member;
an engine operatively connected with the input member;
first and second electric motor/generators;
a differential gear set having multiple members;
selectively engageable torque-transmitting mechanisms;
wherein at least some of the input member, the output member, the engine and the motor/generators are selectively interconnected through the differential gear set by engagement of different combinations of the torque-transmitting mechanisms;
an electronic controller operatively connected to the electric motor/generators and configured to control the electric motor/generators to provide multiple operating modes between the input member and the output member, including;
a first electric-only operating mode in which the engine is off, one of the first and second electric motor/generators acts as a motor to provide torque at the output member while the other of the first and second electric motor/generators is not connected to any of the members of the differential gear set and is able to remain substantially stationary; and
a second electric-only operating mode in which the engine is off and both first and second electric motor/generators act as motors to provide torque at the output member; and
wherein the engine is not continuously connected to any of the members of the differential gear set and is selectively connectable for common rotation with the second motor/generator by engagement of one of the torque-transmitting mechanisms.
12 Assignments
0 Petitions
Accused Products
Abstract
A hybrid powertrain is provided that includes an engine operatively connected with an input member. The powertrain includes a transmission with first and second electric motor/generators, a differential gear set having multiple members, and selectively engagable torque-transmitting mechanisms. The input member, the output member, the engine and the motor/generators are selectively interconnected through the differential gear set by engagement of the torque-transmitting mechanisms in different combinations. An electronic controller controls the electric motor/generators, the engine and the torque-transmitting mechanisms to provide multiple operating modes between the input member and the output member, including an electric-only operating mode in which the engine is off and one motor generator acts as a motor to provide torque at the output member while the other electric motor/generator can remain substantially stationary, and another electric-only operating mode in which both electric motor/generators act as motors to provide torque at the output member.
60 Citations
17 Claims
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1. A hybrid powertrain comprising:
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an input member; an output member; an engine operatively connected with the input member; first and second electric motor/generators; a differential gear set having multiple members; selectively engageable torque-transmitting mechanisms;
wherein at least some of the input member, the output member, the engine and the motor/generators are selectively interconnected through the differential gear set by engagement of different combinations of the torque-transmitting mechanisms;an electronic controller operatively connected to the electric motor/generators and configured to control the electric motor/generators to provide multiple operating modes between the input member and the output member, including; a first electric-only operating mode in which the engine is off, one of the first and second electric motor/generators acts as a motor to provide torque at the output member while the other of the first and second electric motor/generators is not connected to any of the members of the differential gear set and is able to remain substantially stationary; and a second electric-only operating mode in which the engine is off and both first and second electric motor/generators act as motors to provide torque at the output member; and wherein the engine is not continuously connected to any of the members of the differential gear set and is selectively connectable for common rotation with the second motor/generator by engagement of one of the torque-transmitting mechanisms. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A hybrid powertrain comprising:
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an input member; an output member; an engine operatively connected with the input member; first and second electric motor/generators; a differential gear set having multiple members; selectively engageable torque-transmitting mechanisms;
wherein at least some of the input member, the output member, the engine and the motor/generators are selectively interconnected through the differential gear set by engagement of different combinations of the torque-transmitting mechanisms;a stationary member; wherein the multiple members include a first, a second, and a third member;
wherein the first electric motor/generator is continuously connected with said first member;wherein a first of the torque-transmitting mechanisms is selectively engageable to connect the input member to the second motor/generator;
wherein a third of the torque-transmitting mechanisms is selectively engageable to ground the second member to the stationary member;
wherein a second of the torque-transmitting mechanisms is selectively engageable to connect the second electric motor/generator to the second member;
wherein the output member is connected for common rotation with the third member;an electronic controller operatively connected to the electric motor/generators and configured to control the electric motor/generators to provide multiple operating modes between the input member and the output member, including; a first electric-only operating mode in which the engine is off, and one of the first and second electric motor/generators acts as a motor to provide torque at the output member while the other of the first and second electric motor/generators is able to remain substantially stationary; a second electric-only operating mode in which the engine is off and both first and second electric motor/generators act as motors to provide torque at the output member; an output-split operating mode in which the first and third torque-transmitting mechanisms are engaged, the engine is on, and only the first electric motor/generator acts as a motor; and
a series operating mode in which the first and second torque-transmitting mechanisms are engaged, the engine is on, and the second electric motor/generator acts as a generator to power the first electric motor/generator which acts as a motor. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification