Back to results
US 7,125,362 B2Granted
Hybrid powertrain system including smooth shifting automated transmission
AssigneeEaton Corporation
InventorsKevin D. Beaty, Richard A. Nellums
Life of this patent
Estimating the term…
Abstract
A powertrain system is provided that includes a prime mover and a change-gear transmission having an input, at least two gear ratios, and an output. The powertrain system also includes a power shunt configured to route power applied to the transmission by one of the input and the output to the other one of the input and the output. A transmission system and a method for facilitating shifting of a transmission system are also provided.
Claims47
A powertrain system, comprising:
- a prime mover;
- a change-gear transmission including an input, at least two selectable gear ratios, and an output, wherein at least the prime mover selectively applies power to the transmission;
- and
- a power shunt including a first motor-generator and a second motor-generator, that selectively shunts at least a portion of the power applied to the transmission by one of the input and the output to the other one of the input and the output, wherein the first motor-generator selectively generates a power output from a rotational input, the second motor-generator selectively generates a rotational output from a power input, and wherein the ratio gears are engaged by a clutch and the power shunt is configured to route power applied to the transmission by one of the input and the output to the other one of the input and the output such that the rotational speed of a ratio gear is substantially similar to the rotational speed of an engaging clutch during a gear ratio change, wherein the first motor-generator is a generator and the second motor generator is a motor when driveline torque is positive.
1 more element
A powertrain system, comprising:
- a prime mover;
- a change-gear transmission tat includes an input, at least two gear ratios and an output;
- a first motor-generator connected to the input and a second motor-generator connected to the output,
- a first power path between the input and the output of the transmission, the first power path defined by the gear ratios of the transmission;
- and
- a second power path between the input and the output of the transmission, the second power path including a transfer of power from a rotational input to a non-rotational power transfer medium in one of the first motor-generator and the second motor-generator, and a transfer of power from the non-rotational power transfer medium to a rotational output in the other one of the first motor-generator and the second motor-generator, wherein the first motor-generator is a motor and the second motor-generator is a generator when driveline torque is negative.
3 more elements
A transmission system, comprising:
- a change-gear transmission including an input, at least two gear ratios, and an output;
- and
- a power shunt including a first motor-generator and a second motor-generator, that selectively shunts at least a portion of the power applied to the transmission by one of the input and the output to the other one of the input and the output, wherein the first motor-generator selectively generates a power output from a rotational input, the second motor-generator selectively generates a rotational output from a power input, and wherein the ratio gears are engaged by a clutch and the power shunt is configured to route power applied to the transmission by one of the input and the output to the other one of the input and the output such that power transmitted between a selected ratio gear and an engaging clutch significantly decreases or falls to zero, wherein the first motor-generator is a motor and the second motor-generator is a generator when driveline torque is negative.
A powertrain system, comprising:
- a prime mover;
- a change-gear transmission including an input, at least two selectable gear ratios, and an output, wherein at least the prime mover selectively applies power to the transmission;
- and
- a power shunt including a first motor-generator and a second motor-generator, that selectively shunts at least a portion of the power applied to the transmission by one of the input and the output to the other one of the input and the output, wherein the first motor-generator selectively generates a power output from a rotational input, the second motor-generator selectively generates a rotational output from a power input, and wherein the ratio gears are engaged by a clutch and the power shunt is configured to route power applied to the transmission by one of the input and the output to the other one of the input and the output such that the rotational speed of a ratio gear is substantially similar to the rotational speed of an engaging clutch during a gear ratio change, wherein the power shunt selectively shunts all power produced by the prime mover from the input to the output such that no power is transmitted through the gear ratios.
1 more element
A powertrain system, comprising:
- a prime mover;
- a change-gear transmission including an input, at least two selectable gear ratios, and an output, wherein at least the prime mover selectively applies power to the transmission;
- and
- a power shunt including a first motor-generator and a second motor-generator, that selectively shunts at least a portion of the power applied to the transmission by one of the input and the output to the other one of the input and the output, wherein the first motor-generator selectively generates a power output from a rotational input, the second motor-generator selectively generates a rotational output from a power input, wherein the ratio gears are engaged by a clutch and the power shunt is configured to route power applied to the transmission by one of the input and the output to the other one of the input and the output such that the rotational speed of a ratio gear is substantially similar to the rotational speed of an engaging clutch during a gear ratio change, and wherein the first motor-generator is a motor and the second motor-generator is a generator when driveline torque is negative.
1 more element
A powertrain system, comprising:
- a prime mover;
- a change-gear transmission that includes an input, at least two gear ratios and an output;
- a first motor-generator connected to the input and a second motor-generator connected to the output,
- a first power path between the input and the output of the transmission, the first power path defined by the gear ratios of the transmission;
- and
- a second power path between the input and the output of the transmission, the second power path including a transfer of power from a rotational input to a non-rotational power transfer medium in one of the first motor-generator and the second motor-generator, and a transfer of power from the non-rotational power transfer medium to a rotational output in one of the first motor-generator and the second motor-generator wherein the ratio gears are engaged by a clutch and a power shunt is configured to route power through the second power pat such that the rotational speed of a ratio gear is substantially similar to the rotational speed of an engaging clutch during a gear ratio change.
3 more elements
Dependencies are inferred from the claim text.