Poclain Hydraulics Industrie

Cyrille D'Hersignerie

Jean Heren

Laurent Albert

Philippe Raymond Lucienne

André Prigent

Andre Prigent

Julien Lambey

Clement Philippe Recoura

Christophe Gouzou

Loris Taxil

Clément Recoura

Christophe Patte

Jean André Heren

The present invention relates to a hydraulic-assistance system for motor vehicles, comprising a primary motor (M) and two hydraulic machines () connected by a hydraulic circuit such that when a first hydraulic machine () operates as a pump, the second hydraulic machine () operates as a motor. The invention is characterized in that the hydraulic circuit connecting the two machines () is an open circuit passing through a tank (), the hydraulic machine () operating as a motor is a declutchable machine, and the hydraulic machine () operating as a pump is a pump in which the variable displacement is controlled by a device comprising a proportional pressure limiter () placed between a drain line () and the discharge line of the hydraulic machine () operating as a pump, and enabling the assistance pressure to be set, and at least one collection nozzle () placed between the proportional pressure limiter () and the discharge line of the hydraulic machine (), the setpoint pressure controlling the hydraulic machine () operating as a pump being collected between the pressure limiter () and the collection nozzle ().

Hydraulic-assistance system for open-circuit motor vehicles

The invention relates to a hydraulic transmission device for a vehicle, said device comprising a first pump and a second pump, a first hydraulic apparatus and a second hydraulic apparatus, a first supply circuit connecting the first pump to the first apparatus, and a second supply circuit connecting the second pump to the second apparatus and wherein a non-return valve between the supply circuits, the valve having a direction for passing from the first to the second supply circuit, a first return circuit connecting the first apparatus to said pumps, a second return circuit the second apparatus to the admissions to said pumps so that the return circuits are in permanent fluidic communication with each other through a junction.

Oil distribution device with a non-return valve

A vehicle including a driving axle (), a driven axle (), a hydraulic pump () and a hydraulic motor () providing hydraulic assistance for driving the driven axle () by lapping off torque applied to the driving axle (). The driving axle () comprising includes a differential () thus defining two output half axles on which wheels are mounted. Rotation of the box allows the output half axles to be rotationally driven at distinct speeds. The hydraulic pump () includes a rotor and a stator, the stator being mounted fixed with respect to the chassis and the rotor being connected to and rotating as one with the differential box (). The hydraulic pumps () are rotationally driven at a speed equal to the average speed of the two half axles associated with the differential () on which the pump is mounted.

Vehicle with hydraulic assistance by transmitting torque from a driving axle to a driven axle

The present invention relates to a hydraulic circuit comprising:

Hydraulic circuit for progressive engagement of a hydraulic device

A hydrostatic transmission including a main pump, two main ducts serving respectfully as feed and as discharge for first and second hydraulic motors that serve to drive disposed one after the other. A bypass valve can take up a reduced-speed position in which the feed main orifices are connected to the discharge main duct, and an increased-speed position in which one of the motors is bypassed, the feed main orifice of the motor being connected to the discharge main duct via a bypass link, while the other main orifices continue to have their respective links. The apparatus further includes a constriction suitable for being activated to restrict the flow of fluid through the bypass link.

Growing community of inventors

Verberie, France

Cyrille D'Hersignerie