SINGLE PLANETARY HYBRID POWERTRAIN WITH AT LEAST THREE ELECTRICALLY-VARIABLE OPERATING MODES
First Claim
1. A hybrid powertrain for a vehicle comprising:
- an engine;
an input member, an output member, and a stationary member;
a single planetary gear set having a first, a second, and a third member;
wherein the input member is connected for common rotation with the engine;
wherein the output member is connected for common rotation with the second member;
a first and a second motor/generator;
a first, a second, a third, a fourth, and a fifth torque-transmitting mechanism;
wherein the first torque-transmitting mechanism is selectively engagable to ground the first member to the stationary member;
wherein the second torque-transmitting mechanism is selectively engagable to connect the first motor/generator for common rotation with the first member;
wherein the third torque-transmitting mechanism is selectively engagable to connect the input member for common rotation with the first member;
wherein the fourth torque-transmitting mechanism is selectively engagable to connect the input member for common rotation with the third member;
wherein the fifth torque-transmitting mechanism is selectively engagable to connect one of the motor/generators for common rotation with one of the third member and the output member; and
wherein the torque-transmitting mechanisms are engagable in different combinations to establish at least two electric-only operating modes, at least two engine-only operating modes; and
at least three electrically-variable operating modes.
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0 Petitions
Accused Products
Abstract
A hybrid powertrain has an engine, an input member, an output member, and a stationary member, and includes a single planetary gear set having a first, a second, and a third member. The input member is connected for common rotation with the engine. The output member is connected for common rotation with the second member. A first and a second motor/generator are provided, as well as five torque-transmitting mechanisms, including only one brake. The torque-transmitting mechanisms are engagable in different combinations to establish at least two electric-only operating mode, at least two engine-only operating mode, and at least three electrically-variable operating modes. In one embodiment, an electric torque converter operating mode is provided, and may be the default mode in case of motor/generator failure.
16 Citations
15 Claims
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1. A hybrid powertrain for a vehicle comprising:
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an engine; an input member, an output member, and a stationary member; a single planetary gear set having a first, a second, and a third member;
wherein the input member is connected for common rotation with the engine;
wherein the output member is connected for common rotation with the second member;a first and a second motor/generator; a first, a second, a third, a fourth, and a fifth torque-transmitting mechanism; wherein the first torque-transmitting mechanism is selectively engagable to ground the first member to the stationary member;
wherein the second torque-transmitting mechanism is selectively engagable to connect the first motor/generator for common rotation with the first member;
wherein the third torque-transmitting mechanism is selectively engagable to connect the input member for common rotation with the first member;
wherein the fourth torque-transmitting mechanism is selectively engagable to connect the input member for common rotation with the third member;
wherein the fifth torque-transmitting mechanism is selectively engagable to connect one of the motor/generators for common rotation with one of the third member and the output member; and
wherein the torque-transmitting mechanisms are engagable in different combinations to establish at least two electric-only operating modes, at least two engine-only operating modes; and
at least three electrically-variable operating modes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A hybrid powertrain for a vehicle comprising:
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an engine; an input member, an output member, and a stationary member; a single planetary gear set having a ring gear member, a sun gear member and a carrier member;
wherein the input member is connected for common rotation with the engine;
wherein the output member is connected for common rotation with the carrier member;a first and a second motor/generator; a first, a second, a third, a fourth, and a fifth torque-transmitting mechanism; wherein the first torque-transmitting mechanism is selectively engagable to ground the first member to the stationary member;
wherein the second torque-transmitting mechanism is selectively engagable to connect the first motor/generator for common rotation with the first member;
wherein the third torque-transmitting mechanism is selectively engagable to connect the input member for common rotation with the first member;
wherein the fourth torque-transmitting mechanism is selectively engagable to connect the input member for common rotation with the third member;
wherein the fifth torque-transmitting mechanism is selectively engagable to connect the second motor/generator for common rotation with the third member; and
wherein the torque-transmitting mechanisms are engagable in different combinations to establish two electric-only operating modes, two engine-only operating modes; and
four electrically-variable operating modes. - View Dependent Claims (12)
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13. A hybrid powertrain for a vehicle comprising:
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an engine; an input member, an output member, and a stationary member; a single planetary gear set having a ring gear member, a sun gear member and a carrier member;
wherein the input member is connected for common rotation with the engine;
wherein the output member is connected for common rotation with the carrier member;
wherein the second motor/generator is connected for common rotation with the third member;a first and a second motor/generator; a first, a second, a third, a fourth, and a fifth torque-transmitting mechanism; wherein the first torque-transmitting mechanism is selectively engagable to ground the first member to the stationary member;
wherein the second torque-transmitting mechanism is selectively engagable to connect the first motor/generator for common rotation with the first member;
wherein the third torque-transmitting mechanism is selectively engagable to connect the input member for common rotation with the first member;
wherein the fourth torque-transmitting mechanism is selectively engagable to connect the input member for common rotation with the third member;
wherein the fifth torque-transmitting mechanism is selectively engagable to connect the first motor/generator for common rotation with the output member;
wherein the torque-transmitting mechanisms are engagable in different combinations to establish four electric-only operating modes, three engine-only operating modes, three electrically-variable operating modes, and an electric torque converter operating mode in which engine torque is multiplied via the planetary gear set. - View Dependent Claims (14, 15)
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Specification