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EP0159445A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Vehicle drive system

Assignee: INDUSTRIES DEVELOPMENT Corp (INTERNATIONAL SERVICES) Co Ltd
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Filing: 1984-11-30
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Granted: —
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Expires: 2004-11-30
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Abstract

Abstract A vehicle drive system including: a source of rotational energy (10); a flywheel (20); a first variable displacement hydrostatic unit (70); a second variable displacement hydrostatic unit (72); differential gear means (62) comprising a first drive terminal, a second drive terminal and a third drive terminal; and including means for selectable coupling of the variable displacement hydrostatic transmissions and the source of rotational energy and the flywheel to the drive wheels of the vehicle, relief valve means (116) operable between the first and second variable displacement hydrostatic units, first means for coupling in a first mode of operation (1) the flywheel and the source of rotational energy to the first drive terminal; (2) the second drive terminal to the first variable displacement hydrostatic unit; (3) the third drive terminal to the drive wheels; second means for coupling in a second mode of operation (1) the flywheel to the third drive terminal; (2) the engine (10) and the first drive terminal to the drive wheels.

Inventors

  • 👤 Moshe Miller
  • 👤 Moti Goldhirsh

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-30 06:19
CPC Classifications
B; B60; B60K; B60K17/00; B60K17/04; B60K17/10; B60K6/00; B60K6/08; B60K6/10; B60K6/105; F; F16; F16H; F16H37/00; F16H37/02; F16H37/06; F16H37/08; F16H37/0833; F16H37/084; F16H2037/0866; F16H47/00; F16H47/02; F16H47/04; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/62

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 185 words
A vehicle drive system including: a source of rotational energy; a flywheel; first variable displacement hydrostatic means; second variable displacement hydrostatic means; differential gear means comprising a first drive terminal, a second drive terminal and a third drive terminal; and including: means for selectable coupling of said first and second variable displacement hydrostatic means and said source of rotational energy and said flywheel to drive wheels of a vehicle; and including first means for coupling in a first mode of operation (1)said flywheel and said source of rotational energy to said first drive terminal; (2)said second drive terminal to said first variable displacement hydrostatic means; (3)said third drive terminal to said drive wheels; second means for coupling in a second mode of operation (1)said flywheel to said third drive terminal; (2)said engine and said first drive terminal to said drive wheels; relief valve means operable between said first and second variable displacement hydrostatic means; control means operative in response to demands of the driver to adjust the displacement of said first and said second variable displacement hydrostatic means to obtain a predetermined output drive torque.
Claim 2
Dependent Claim 185 words
A vehicle drive system including: a source of rotational energy; a flywheel; first variable displacement hydrostatic means; second variable displacement hydrostatic means; differential gear means comprising a first drive terminal, a second drive terminal and a third drive terminal; and including: means for selectable coupling of said first and second variable displacement hydrostatic means and said source of rotational energy and said flywheel to drive wheels of a vehicle; and including first means for coupling in a first mode of operation (1)said flywheel and said source of rotational energy to said first drive terminal; (2)said second drive terminal to said first variable displacement hydrostatic means; (3)said third drive terminal to said drive wheels; second means for coupling in a second mode of operation (1)said flywheel to said third drive terminal; (2)said engine and said first drive terminal to said drive wheels; relief valve means operable between said first and second variable displacement hydrostatic means; control means operative in response to demands of the driver to adjust the displacement of said first and said second variable displacement hydrostatic means to obtain a predetermined output drive torque.
Claim 3
Dependent Claim 48 words
A vehicle drive system according to claim 1 wherein, said first means and said second means comprise clutch means and control means, said control means operative in response to a condition of synchronization so that transitions between said first and said second modes of operation occur substantially synchronously.
Claim 4
Dependent Claim 33 words
A vehicle drive system according to claim 2 wherein said drive system also comprises a primary means for coupling in a primary mode of operation (l)said second drive terminal to said drive wheels.
Claim 5
Dependent Claim 49 words
A vehicle drive system according to claim 3 wherein, said primary means and said first means comprise clutch means and control means, said control means operative in response to a condition of synchronization so that transitions between said primary means and said first means of operation occur substantially synchronously.
Claim 6
Dependent Claim 61 words
A vehicle drive system according to claim 1 or claim 3 and including a power-take-off drive system, said power-take-off being driven by said flywheel or by said engine, depending upon the operating speed of said flywheel or said engine, wherein the overall speed variation of said power-take-off is substantially less than the overall speed variation of said engine and said flywheel.

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