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A hybrid power system for a vehicle which may include an internal combustion engine and a supplemental energy system for converting the mechanical energy generated by the engine to electrical energy and storing it as opportunity provides; and using the stored electrical energy to augment engine outp

A hybrid power system for a vehicle which may include an internal combustion engine and a supplemental energy system for converting the mechanical energy generated by the engine to electrical energy and storing it as opportunity provides; and using the stored electrical energy to augment engine output as necessary. The supplemental energy system may include a motor-generator engaged with a flywheel.

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1. A hybrid power system for a work vehicle having a power train and wheels for propelling the vehicle, the hybrid power system comprising: an engine;a flywheel with flywheel teeth;a flywheel housing;a first mounting flange;a second mounting flange;a starter engaged with the flywheel via the first m

1. A hybrid power system for a work vehicle having a power train and wheels for propelling the vehicle, the hybrid power system comprising: an engine;a flywheel with flywheel teeth;a flywheel housing;a first mounting flange;a second mounting flange;a starter engaged with the flywheel via the first mounting flange;a rechargeable electrical energy storage system;a bidirectional machine engaged with the flywheel via the second mounting flange such that a movement of the flywheel may result in a movement of a portion of the bidirectional machine and a movement of the portion of the bidirectional machine results in the movement of the flywheel, the bidirectional machine comprising a motor-generator and an AC-DC converter, the bidirectional machine converting mechanical energy to electrical energy and supplying the electrical energy to the rechargeable electrical energy storage system for storage in a first mode and receiving electrical energy from the rechargeable electrical energy storage system and converting it to mechanical energy to supplement engine output in a second mode. 2. The hybrid power system of claim 1, wherein the motor-generator supplies alternating current to the AC-DC converter and the AC-DC converter supplies direct current to the rechargeable electrical energy storage system for storage. 3. The hybrid power system of claim 1, wherein the rechargeable electrical energy storage system supplies direct current to the AC-DC converter and the AC-DC converter converts the direct current to alternating current and supplies it to the motor-generator for conversion to mechanical power for application to the flywheel. 4. The hybrid power system of claim 1, wherein the bidirectional machine includes motor-generator engagement teeth. 5. The hybrid power system of claim 4, wherein the bidirectional machine is directly attached to the second mounting flange and directly engages the flywheel via contact between the flywheel teeth and the motor-generator engagement teeth. 6. The hybrid power system of claim 4, further comprising a gearbox having a gearbox engagement gear with gearbox engagement teeth and at least one transfer gear with transfer gear teeth, wherein the first mounting flange and the second mounting flange are included in the gearbox. 7. The hybrid power system of claim 6, further comprising a third mounting flange, wherein the gearbox is engaged with the flywheel through the third mounting flange. 8. The hybrid power system of claim 7, wherein the gearbox engages the flywheel via contact between the flywheel teeth and the gearbox engagement teeth. 9. The hybrid power system of claim 8, wherein the motor-generator engages the flywheel via contact between the motor-generator engagement teeth and the transfer gear teeth.