US 2016/0107524 A1Published application

Hydrostatic Transmission System of a Mobile Machine Traveling on a Slope with a Tilt

AssigneesFluid-System, Cnh Industrial LLC

InventorFrédéric Lagors

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Abstract

A hydrostatic transmission device of a mobile machine having—at least one first motor and at least one second motor,—at least one first dual motor and at least one second dual motor each having first and second elementary motor,—the second elementary motor of the first dual motor is linked with the first motor by a serial duct,—the second elementary motor of the second dual motor is linked with the second motor by a serial duct,—each serial duct has a valve having an opening for passage of the fluid into the serial duct, said valve having a first position in which said opening has a maximum cross-section, and a second position in which said opening has a reduced cross-section, the movement of said valve between these two positions activated a control instruction generated when the machine is travelling on a slope.

Claims15

Dependent claims

A hydrostatic transmission system of a mobile machine comprising:

a pump the principal ports of which are respectively connected to a high-pressure duct and a high-pressure duct,
at least one motor and at least one second motor,
at least one first dual motor and at least one second dual motor, which dual motors each comprise a first elementary motor and a second elementary motor,
the first elementary motors, the first motor and the second motor are connected in parallel to the high-pressure duct,
the first elementary motors and the second elementary motors are connected in parallel to the high-pressure duct,
the second elementary motor of the first dual motor is connected in series with the first motor, there being a first series duct between these two motors,
the second elementary motor of the second dual motor is connected in series with the second motor, there being a second series duct between these two motors,
wherein each of the first and second series duct includes a valve having an opening for the passage of the fluid into the respective series duct, said valve having a first position in which said opening has a maximum section and a second position in which said opening has a smaller section, the movement of said valve between these two positions being activated in response to a control instruction that is generated when the mobile machine is travelling on a slope with a tilt.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/785,293Filed 16 Apr 2014
Priority: FR 135347117 Apr 2013
Published: 21 Apr 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

B60K 17/356
For driving both front and rear wheels, e.g. four wheel drive vehicles: having fluid or electric motor, for driving one or more wheels
B60K 17/10
Characterised by arrangement, location or kind of gearing: of fluid gearing
F16H 59/66
Inputs being a function of ambient conditions: road conditions, e.g. slope, slippery
F16H 61/4008
Hydrostatic: control of circuit pressure