Poclain Hydraulics Industrie

Marko Zust

André Prigent

Bertrand Lemaitre

Antoine Desmyttere

A driver circuit for driving a brake having a first orifice adapted to be connected to a pressure source, a second orifice connected to a reservoir, a third orifice receiving a braking setpoint, and a fourth orifice connected to a brake. The driver circuit includes a proportional solenoid valve connected to the first orifice; an on/off solenoid valve connected to the third orifice; and a proportional braking valve provided with an actuator and configured in such a manner as to connect a brake selectively to a pressure source or to a reservoir. The actuator is configured in such a manner as to be driven by the higher of the two pressures delivered by the proportional solenoid valve and delivered by the on/off solenoid valve.

Hydraulic brake circuit

A braking circuit including at least an auxiliary right valve () and an auxiliary left valve () suitable to allow braking on both sides, right and left of a vehicle, when this is required, but allowing to apply a pressure braking only on one of the two sides, right or left, when this is required to provide a steering function, characterized in that the circuit further comprises a master valve () having two positions: a first position when the vehicle has a velocity under a threshold wherein separate and selective right or left braking is authorized and a second position when the vehicle has a velocity above said threshold wherein said master valve () connects both a right braking line () and a left braking line () to an output braking line () so that if a braking is requested both right braking line () and left braking line () are under pressure and selective right or left braking is forbidden.

Growing community of inventors

Verberie, France

Marko Zust