Emergency hydraulic braking method and circuit for coupling
AssigneePoclain Hydraulics Industrie
InventorAndré Prigent
Life of this patent
Estimating the term…
Abstract
A method for driving a parking brake of a vehicle (V) wherein: for a setpoint between 0 and C1, the control pressure (200) is zero, and the supplementary pressure (100) is non—zero constant; for a setpoint between C1 and C3, the control pressure is proportional to the setpoint, for a setpoint between C2 and Cmax, the supplementary pressure is zero; said values being such that 0<C1<C2<Cmax, and 0<C1<C3<Cmax.
Claims20
A method for driving a parking brake of a vehicle, comprising a control line and a supplementary line suitable for being linked to a hydraulic braking system of a coupling, wherein the pressure is driven in the control line and in the supplementary line as a function of a setpoint applied to the parking brake between 0 and Cmax, said driving method being such that:
- for a setpoint between 0 and C1, the pressure in the control line is zero, and the pressure in the supplementary line is kept at a constant non-zero value Psupp;
- for a setpoint between C1 and C3, a braking pressure proportional to the setpoint is applied via the control line;
- for a setpoint between C2 and Cmax, the pressure in the supplementary line is zero;
- said values being such that
- 0≤C1<C2≤Cmax, and
- 0≤C1<C3≤Cmax.
A hydraulic braking system of a vehicle, comprising a control line and a supplementary line suitable for being linked to a hydraulic braking system of a coupling, a parking brake and a computer configured in such a way as to drive the pressure in the control line via a control valve and in the supplementary line via a supplementary valve as a function of a setpoint applied to the parking brake between 0 and Cmax,
- said computer being configured in such a way as to
- for a setpoint between 0 and C1, drive the control valve such that the pressure in the control line is zero, and drive the supplementary valve such that the pressure in the supplementary line is kept at a constant non-zero value Psupp;
- for a setpoint between C1 and C3, drive the control valve such that the pressure in the control line is proportional to said setpoint;
- for a setpoint between C2 and Cmax, drive the supplementary valve such that the pressure in the supplementary line is zero;
- said values being such that
- 0≤C1<C2≤Cmax, and
- 0≤C1<C3≤Cmax.
Dependencies are inferred from the claim text.