Hybrid drive system for vehicle with clutch control
First Claim
1. A hybrid drive system for a vehicle, comprising:
- at least one driven wheel;
a first electric motor having a first rotor in driving relationship to said driven wheel;
a fuel powered heat engine having an engine drive shaft;
a second electric motor having a second rotor in driving connection to said engine drive shaft,a clutch to engage and disengage said heat engine to and from said first rotor; and
a controller for translating the vehicle operator'"'"'s torque request demand into operation of said first electric motor, said second electric motor and said clutch in response to a command to engage said clutch.
1 Assignment
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Accused Products
Abstract
A hybrid drive system for a vehicle comprises a first electric motor in driving relationship to at least one driven wheel, a heat engine, a second electric motor in driving connection to the engine, and a clutch to engage and disengage the engine to and from the driven wheel. Immediately after or upon a command to engage the clutch, a controller retrieves, based on a measure of speed of the driven wheel, data of maximum input torque, which the second motor is capable of absorbing from the engine and data of maximum output torque, which the first motor is capable of producing. The controller compares the torque request command with the retrieved data and selects one of a plurality of different protocols for operation of the first and second electric motors and the heat engine.
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Citations
21 Claims
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1. A hybrid drive system for a vehicle, comprising:
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at least one driven wheel; a first electric motor having a first rotor in driving relationship to said driven wheel; a fuel powered heat engine having an engine drive shaft; a second electric motor having a second rotor in driving connection to said engine drive shaft, a clutch to engage and disengage said heat engine to and from said first rotor; and a controller for translating the vehicle operator'"'"'s torque request demand into operation of said first electric motor, said second electric motor and said clutch in response to a command to engage said clutch. - View Dependent Claims (2, 3, 4)
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5. A hybrid drive system for a vehicle, comprising:
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at least one driven wheel; a first electric motor having a first rotor in driving relationship to said driven wheel via a transmission; a fuel powered heat engine having an engine drive shaft; a second electric motor having a second rotor in driving connection to said engine drive shaft, a clutch between said engine drive shaft and said first rotor; and a controller for generating a command to engage said clutch in response to the vehicle operator'"'"'s torque request demand and the vehicle speed, comparing the vehicle operator'"'"'s torque request demand with the maximum input torque by said second electric motor and the maximum output torque by said first electric motor, and controlling operation of the procedure of engagement of said clutch beginning with said command in response to result from said comparison. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A hybrid drive system for a vehicle, comprising:
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at least one driven wheel; a first electric motor having a first rotor in driving relationship to said driven wheel; a fuel powered heat engine having an engine drive shaft; a second electric motor having a second rotor in driving connection to said engine drive shaft, a clutch to engage and disengage said heat engine to and from said first rotor; and means for translating the vehicle operator'"'"'s torque request demand into operation of said first electric motor, said second electric motor and said clutch in response to a command to engage said clutch.
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21. A method of operating a vehicle hybrid drive system including an electric motor in driving relationship to a driven wheel, a heat engine, and a clutch to engage and disengage the heat engine to and from the electric motor, comprising:
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sensing vehicle operator'"'"'s desire relative to movement of the vehicle; translating the sensed vehicle operator'"'"'s desire into vehicle operator'"'"'s torque request demand; generating a command to engage the clutch; and translating the vehicle'"'"'s operator torque request demand into operation of the engine, operation of the electric motor and operation of the clutch during transient period beginning with said command to engage the clutch.
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Specification