Drive arrangement for a vehicle
First Claim
1. A drive arrangement for a motor vehicle, comprising:
- (a) a first prime mover;
(b) a hydrostatic-mechanical power branching transmission driven by said first prime mover, said transmission including an epicyclic differential and at least two hydromechanical transducers, said first prime mover being connected with an input shaft of said epicyclic differential, and an output shaft of said epicyclic differential being connected with drive train axle of said motor vehicle, and wherein two of said at least two hydromechanical transducers each have one shaft thereof drivingly connected with a respective different shaft of said epicyclic differential;
(c) and an emergency prime mover comprising an auxiliary motor formed by an internal combustion engine, and a variable hydromechanical transducer driven by said auxiliary motor, said emergency prime mover being selectively actuatable depending upon need and, subsequent to actuation, said variable hydromechanical transducer transmitting hydrostatic power to one of said at least two hydromechanical transducers, through said two of said at least two hydromechanical transducers of said power branching transmission to said epicyclic differential, and from said differential to said drive train axle of said motor vehicle.
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Accused Products
Abstract
The invention provides an improved form of drive arrangement for use in a motor vehicle comprising a first prime mover, a hydromechanical power branching transmission, driven by the prime mover, and having at least two hydromechanical transducers, by the inclusion of an emergency drive device which comprises a second prime mover adapted to act as a standby prime mover and an adjustable hydromechanical transducer arranged to be driven by the second prime mover. The second prime mover is adapted to supply hydraulic power via the adjustable hydromechanical transducer to the hydromechanical transducers of the power branching transmission and thence to a driven axle of the vehicle in the event of the first prime mover becoming inoperative, for example, if the first prime mover fails or (in the event of its being an electric motor) if its supply of energy breaks down.
66 Citations
5 Claims
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1. A drive arrangement for a motor vehicle, comprising:
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(a) a first prime mover; (b) a hydrostatic-mechanical power branching transmission driven by said first prime mover, said transmission including an epicyclic differential and at least two hydromechanical transducers, said first prime mover being connected with an input shaft of said epicyclic differential, and an output shaft of said epicyclic differential being connected with drive train axle of said motor vehicle, and wherein two of said at least two hydromechanical transducers each have one shaft thereof drivingly connected with a respective different shaft of said epicyclic differential; (c) and an emergency prime mover comprising an auxiliary motor formed by an internal combustion engine, and a variable hydromechanical transducer driven by said auxiliary motor, said emergency prime mover being selectively actuatable depending upon need and, subsequent to actuation, said variable hydromechanical transducer transmitting hydrostatic power to one of said at least two hydromechanical transducers, through said two of said at least two hydromechanical transducers of said power branching transmission to said epicyclic differential, and from said differential to said drive train axle of said motor vehicle. - View Dependent Claims (2, 3, 4, 5)
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Specification