System and method for boosting torque output of a drive train
First Claim
1. A method for boosting a torque output of a drive train of a machine, the method comprising:
- detecting an engine torque of an engine having a baseline torque versus engine speed curve;
determining if the detected engine torque is within a first torque range of engine torques; and
activating an electric motor to rotate substantially synchronously with a corresponding engine speed associated with the detected torque within the first torque range in an electric propulsion mode in accordance with a supplemental torque versus engine speed curve if the detected engine torque is within the first torque range, the supplemental torque versus engine speed curve intercepting the baseline torque versus engine speed curve at a first lower speed point and a first higher speed point.
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Abstract
A method and system for boosting a torque output of a drive train comprises a torque sensor for detecting an engine torque of an engine having a baseline torque versus engine speed curve. A data processor determines if the detected engine torque is within a first torque range, if the detected engine torque is within the first range, the electric motor is activated to rotate substantially synchronously with a corresponding engine speed associated with the detected engine torque in accordance with a supplemental torque versus engine speed curve. The supplemental torque versus engine speed curve intercepts the baseline torque versus engine speed curve at a first lower speed point and a first higher speed point.
37 Citations
20 Claims
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1. A method for boosting a torque output of a drive train of a machine, the method comprising:
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detecting an engine torque of an engine having a baseline torque versus engine speed curve; determining if the detected engine torque is within a first torque range of engine torques; and activating an electric motor to rotate substantially synchronously with a corresponding engine speed associated with the detected torque within the first torque range in an electric propulsion mode in accordance with a supplemental torque versus engine speed curve if the detected engine torque is within the first torque range, the supplemental torque versus engine speed curve intercepting the baseline torque versus engine speed curve at a first lower speed point and a first higher speed point. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for boosting a torque output of a drive train, the system comprising:
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a torque sensor for detecting an engine torque of an engine having a baseline torque versus engine speed curve; a data processor for determining if the detected engine torque is within a first range of engine torques; and a motor controller for activating an electric motor to rotate substantially synchronously with a corresponding engine speed associated with the detected engine torque within the first range in an electric propulsion mode in accordance with a supplemental torque versus engine speed curve, the supplemental torque versus engine speed curve intercepting the baseline torque versus engine speed curve at a lower speed point and a higher speed point. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification