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, the method comprising:
- detecting an engine speed of an engine having a baseline torque versus engine speed curve;
determining if the detected engine speed is within a first speed range of engine speeds; and
activating an electric motor to rotate substantially synchronously with the detected engine speed within the first speed range in an electric propulsion mode in accordance with a supplemental torque versus engine speed curve if the detected engine speed is within the first speed 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 an engine speed detector for detecting an engine speed of an engine having a baseline torque versus engine speed curve. A data processor determines if the detected engine speed is within a first range of engine speeds, if the detected engine speed is within the first range, the electric motor is activated to rotate substantially synchronously with the engine speed 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 intercepts the baseline torque versus engine speed curve at a lower engine speed point and a higher engine speed point.
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Citations
16 Claims
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1. A method for boosting a torque output of a drive train, the method comprising:
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detecting an engine speed of an engine having a baseline torque versus engine speed curve; determining if the detected engine speed is within a first speed range of engine speeds; and activating an electric motor to rotate substantially synchronously with the detected engine speed within the first speed range in an electric propulsion mode in accordance with a supplemental torque versus engine speed curve if the detected engine speed is within the first speed 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)
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9. A system for boosting a torque output of a drive train, the system comprising:
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an engine speed detector for detecting an engine speed of an engine having a baseline torque versus engine speed curve; a data processor for determining if the detected engine speed is within a first speed range of engine speeds; and a motor controller for activating an electric motor to rotate substantially synchronously with the engine speed within the first speed 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 (10, 11, 12, 13, 14, 15, 16)
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Specification