Apparatus and method for driving a mechanically-driven device in an electrical vehicle
First Claim
1. An apparatus for driving a mechanically-driven device in an electrical vehicle having at least one electrical traction motor, the apparatus comprising:
- an auxiliary electrical motor mechanically connected to the mechanically-driven device;
a connecting means for providing a disengageable mechanical connection between the auxiliary motor and the electrical traction motor; and
a control means for controlling the connecting means and electrically disconnecting the auxiliary motor when the mechanical connection between the traction motor and the auxiliary motor is engaged.
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Accused Products
Abstract
The apparatus is used for driving a mechanically-driven device in an electrical vehicle having at least one electrical traction motor. The apparatus comprises an auxiliary electrical motor mechanically connected to the device. The device is driven by the auxiliary motor when enabling conditions are not met, such as when the traction motor has a rotation speed which is slower than a pre-set rotation speed. When the proper conditions are met, the mechanical connection between the auxiliary motor and the traction motor is engaged and the auxiliary motor is electrically disconnected to save energy. The mechanical connection is disengaged when the proper conditions are no longer met. The apparatus is particularly suitable for use with a power steering pump.
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Citations
11 Claims
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1. An apparatus for driving a mechanically-driven device in an electrical vehicle having at least one electrical traction motor, the apparatus comprising:
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an auxiliary electrical motor mechanically connected to the mechanically-driven device; a connecting means for providing a disengageable mechanical connection between the auxiliary motor and the electrical traction motor; and a control means for controlling the connecting means and electrically disconnecting the auxiliary motor when the mechanical connection between the traction motor and the auxiliary motor is engaged. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of driving a mechanically-driven device in an electrical vehicle having at least one electrical traction motor having a main axle, the method comprising the steps of:
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driving the device with an auxiliary electrical motor when the traction motor has a rotation speed which is slower than a pre-set rotation speed; engaging a mechanical connection between the auxiliary motor and the traction motor when enabling conditions are met; electrically disconnecting the auxiliary motor whenever the mechanical connection between the auxiliary motor and the traction motor is engaged; disengaging the mechanical connection when the enabling conditions are no longer met; and electrically reconnecting the auxiliary motor whenever the mechanical mechanism is engaged. - View Dependent Claims (10, 11)
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Specification