US 4,748,810 AGranted

Hydromechanical torque transmission device

AssigneeCompagnie de Construction Mecanique Sulzer

InventorsDaniel Leroy, Jean-Francois Boellman

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Abstract

A hydromechanical torque transmission device comprises three coaxial rotatable bodies. These are a driving body, an intermediary body and a driven body. The driving and driven bodies are adapted to be coupled to respective coaxial shafts that are to be coupled together in rotation. A speed correlator system is adapted to maintain the speeds of the driving and driven bodies relative to the intermediary body in a predetermined ratio. The intermediary body comprises a hydraulic circuit. The driving and intermediary bodies define a first pump adapted to cause a flow of fluid in this hydraulic circuit. The intermediary and driven bodies define a second pump also adapted to cause a flow of fluid in the hydraulic circuit. One at least of the first and second pumps has a variable volumetric capacity. The device also comprises means for controlling variations in this variable volumetric capacity.

Claims8

Dependent claims

Hydromechanical torque transmission device comprising:

three coaxial rotatable bodies comprising a driving body, an intermediary body and a driven body, said driving and driven bodies being coupled to respective coaxial shafts adapted to be coupled together in rotation, and
speed correlator means for maintaining the speeds of said driving and driven bodies relative to said intermediary body in a predetermined ratio,
said intermediary body comprising a hydraulic circuit,
said driving and intermediary bodies comprising complementary first pump means defining a first pump adapted to cause a flow of fluid in said hydraulic circuit,
said intermediary and driven bodies comprising complementary second pump means defining a second pump adapted to cause a flow of fluid in said hydraulic circuit, and
at least one of said first and second pumps being of variable volumetric capacity,
the device further comprising means for controlling variations in said variable volumetric capacity.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/901,526Filed 28 Aug 1986
Priority: FR 85 130052 Sep 1985
Granted: 7 Jun 1988
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

F16H 39/24
With liquid chambers shaped as bodies of revolution concentric with the main axis of the gearing: with rotary displacement members, e.g. provided…
F16H 47/04
The fluid gearing being of the volumetric type: the mechanical gearing being of the type with members having orbital motion
F16H 2037/088
At least one power path being a continuously variable transmission, i.e. CVT: power-split transmissions with summing differentials, with the input…
F16H
Gearing