NEGATIVE DRIVELINE TORQUE CONTROL INCORPORATING TRANSMISSION STATE SELECTION FOR A HYBRID VEHICLE
First Claim
1. A hybrid propulsion system for a vehicle, comprising:
- at least one drive wheel;
a first motor coupled to the drive wheel, said first motor configured to selectively generate electrical energy from kinetic energy received at the drive wheel;
a second motor configured to selectively generate electrical energy from kinetic energy received at the drive wheel;
a transmission including a first end coupled to the first motor and a second end coupled to the second motor; and
a control system configured to vary a level of electrical energy generated by the first motor relative to the second motor in response to a thermal condition of at least one of said first and second motors to provide vehicle braking.
1 Assignment
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Accused Products
Abstract
In one embodiment, a hybrid propulsion system for a vehicle is provided. The system comprises at least one drive wheel; a first motor coupled to the drive wheel, said first motor configured to selectively generate electrical energy from kinetic energy received at the drive wheel; a second motor configured to selectively generate electrical energy from kinetic energy received at the drive wheel; a transmission including a first end coupled to the first motor and a second end coupled to the second motor; and a control system configured to vary a level of electrical energy generated by the first motor relative to the second motor in response to a thermal condition of at least one of said first and second motors to provide vehicle braking.
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Citations
20 Claims
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1. A hybrid propulsion system for a vehicle, comprising:
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at least one drive wheel; a first motor coupled to the drive wheel, said first motor configured to selectively generate electrical energy from kinetic energy received at the drive wheel; a second motor configured to selectively generate electrical energy from kinetic energy received at the drive wheel; a transmission including a first end coupled to the first motor and a second end coupled to the second motor; and a control system configured to vary a level of electrical energy generated by the first motor relative to the second motor in response to a thermal condition of at least one of said first and second motors to provide vehicle braking. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of operating a hybrid propulsion system for a vehicle, wherein the hybrid propulsion system includes a first motor coupled to a drive wheel and a second motor coupled to the drive wheel via a transmission, the method comprising:
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during a first temperature condition of the first motor, operating at least the first motor to provide a first level of vehicle braking torque responsive to a given vehicle braking request; during a second temperature condition of the first motor higher than said first temperature condition, operating the first motor to provide a second level of vehicle braking torque less than said first level of braking torque responsive to the given vehicle braking request. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method of operating a hybrid propulsion system for a vehicle, wherein the hybrid propulsion system includes a first motor coupled to a drive wheel and a vehicle braking device coupled to the drive wheel via a transmission, the method comprising:
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receiving a vehicle braking request from a user at a user input device; in response to said vehicle braking request, adjusting a level of vehicle braking provided by the first motor based on an amount of electrical energy generated by the first motor at said level of vehicle braking provide by the first motor; and adjusting a level of vehicle braking provided by the vehicle braking device based on said level of vehicle braking provided by the first motor. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification