US4815334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive arrangement for a vehicle
Assignee: MAN Truck and Bus SE
•
Filing: 1987-07-01
•
Granted: 1989-03-28
•
Expires: 2007-07-01
Abstract
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.
Inventors
- 👤 Gerald Lexen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:16
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/4157; B; B60; B60K; B60K5/00; B60K5/08; B60K6/00; B60K6/08; B60K6/12; B60K6/20; B60K6/42; B60K6/48; F16H61/4078; F16H61/4096; F16H61/44; B60K2006/4816; B60K6/22; B60K6/36; F16H37/00; F16H37/02; F16H37/06; F16H37/08; F16H37/10; F16H2037/103; F16H47/00; F16H47/02; F16H47/04; F16H2047/045; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/62; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19014
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
183 words
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.
Claim 2
Dependent Claim
183 words
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.
Claim 3
Dependent Claim
75 words
A drive arrangement as claimed in claim 1, wherein said emergency prime mover is employed for auxiliary functions in addition to purposes of emergency drive, said variable hydromechanical transducer being operable to retard fluid flow between said two of said at least two hydromechanical trasnducers; and a hydraulic control block including switching and control components having hydraulic control conduits connected to said two of said at least two hydromechanical transducers of said power branching transmission,
Claim 4
Dependent Claim
151 words
A drive arrangement as claimed in claim 1, wherein a brake energy recovery device is operatively connected with said power branching transmission, said device comprising: (a) a hydraulic high pressure accumulator, (b) a hydraulic low pressure accumulator, (c) and a hydraulic control block for controlling charging and discharging sequences having hydraulic conduits of said high pressure and low pressure accumulators connected thereto, such that during braking of said motor vehicle the kinetic energy of said vehicle is convertible through said power branching transmission into potential pressure energy which is storable in said high pressure accumulator, and said stored pressure energy is transmittable for the start-up of said vehicle from said high pressure accumulator by discharging of said accumulator through said power branching transmission to said drive train axle, and said emergency prime mover being employable for the recharging of said high pressure accumulator during the normal operation of said motor vehicle.
Claim 5
Dependent Claim
18 words
A drive arrangement as claimed in claim 1, wherein said variable hydromechanical transducer comprises an oblique shaft transducer.
Claim 6
Dependent Claim
19 words
A drive arrangement as claimed in claim 1, wherein said variable hydromechanical transducer comprises a swash plate hydromechanical transducer.
References Cited (Backward Citations)
US1466011A
Cited
US2581320A
Cited
US2779213A
Cited
US2878691A
Cited
US3065652A
Cited
US3503281A
Cited
US3503278A
Cited
US3576106A
Cited
US3683719A
Cited
US3665788A
Cited
US3861484A
Cited
US3823620A
Cited
US3830349A
Cited
US3951008A
Cited
US4100822A
Cited
US4586400A
Cited
US4516655A
Cited
US4569251A
Cited
US4667536A
Cited
US4718299A
Cited
US4684081A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-27 | 1992-09-26 | 1993-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-27 | 1996-09-26 | 1997-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-27 | 2000-09-26 | 2001-03-28 | $7700.00 | Window Closed / Lapsed |