Hydraulic brake architectures for aircrafts for braking at least one wheel of the aircraft
AssigneeMessier-Bugatti-Dowty
InventorDavid Frank
Life of this patent
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Abstract
Aircraft hydraulic parking architecture, including a brake with a wheel braking hydraulic actuator, a pressure source (Alim) of high-pressure fluid, a normal braking hydraulic circuit (C1) including at least pressure control servo valve with a supply port (P) connected to the pressure source (Alim), a return port (R), a utilization port (U) connected to the actuator, the brake architecture further including a parking hydraulic circuit (C2) including a parking brake valve (PkBV) having an outlet port (Ps1) selectively connected either to the pressure source (Alim) or a low-pressure return circuit (CR). The outlet port (Ps1) of the parking brake valve (PkBV) is connected to the return port (R) of the pressure control servo valve.
Claims4
A hydraulic brake architecture for aircrafts, including at least one wheel, the architecture including:
- at least one brake provided with at least one hydraulic actuator for braking the wheel,
- at least one pressure source (Alim) adapted to deliver a hydraulic fluid at high pressure;
- and
- a normal braking hydraulic circuit (C1) including:
- at least one pressure control servo valve (BCV) including:
- a supply port (P) connected to the pressure source (Alim);
- a return port (R);
- a utilization port (U) connected to the braking hydraulic actuator;
- and
- distribution means mounted so as to be mobile so as to connect the utilization port (U) either with the supply port (P) or with the return port (R);
- the brake architecture further including a parking hydraulic circuit (C2) including:
- a parking brake valve (PkBV) having a return port (R1) connected to a return circuit (CR) at a pressure the is low relative to said high pressure and an outlet port (Ps1) said outlet port (Ps1) of the parking brake valve (PkBV) being adapted to be connected selectively either to the pressure source (Alim) or to said return circuit (CR) via return oirt (R1) of the parking brake valve (PkBV);
- characterized in that the outlet port (Ps1) of the parking brake valve (PkBV) is connected to the return port (R) of the pressure control servo valve (BCV).
A hydraulic brake architecture for aircrafts, including at least one wheel, the architecture including:
- at least one brake provided with at least one hydraulic actuator for braking the wheel,
- at least one pressure source (Alim) adapted to deliver a hydraulic fluid at high pressure;
- and
- a normal braking hydraulic circuit (C1) including:
- at least one pressure control servo valve (BCV) including:
- a supply port (P) connected to the pressure source (Alim);
- a return port (R);
- a utilization port (U) connected to the braking hydraulic actuator;
- and
- distribution means mounted so as to be mobile so as to connect the utilization port (U) either with the supply port (P) or with the return port (R);
- the brake architecture further including a parking hydraulic circuit (C2) including:
- a parking brake valve (PkBV) having an outlet port (Ps1) adapted to be connected selectively either to the pressure source (Alim) or to a return circuit (CR) at a pressure that is low relative to said high pressure;
- characterized in that the outlet port (Ps1) of the parking brake valve (PkBV) is connected to the return port (R) of the pressure control servo valve (BCV)., wherein the normal braking hydraulic circuit includes a fluid inlet control valve (SOV) having an inlet port (Pe2) connected to the supply source (Alim) and an outlet port (Ps2) connected to the supply port (P) of the pressure control servo valve (BCV),
- the fluid inlet control valve (SOV) further including a return port (R2) connected to the outlet port (Ps1) of the parking brake valve (PkBV) and to the return port (R) of the pressure control servo valve (BCV), this fluid inlet control valve (SOV) selectively adopting:
- a configuration of supplying the normal braking hydraulic circuit in which:
- the connection between the inlet port (Pe2) and the outlet port (Ps2) of the control valve (SOV) is allowed;
- and
- the connection of the return port (R2) of the fluid inlet control valve (SOV) with its inlet port (Pe2) and outlet port (Ps2) is not allowed;
- and
- a configuration of cutting off the supply of the normal braking hydraulic circuit in which:
- the connection between the inlet port (Pe2) and the outlet port (Ps2) of the control valve (SOV) is not allowed;
- and
- the connection of the return port (R2) of the fluid inlet control valve (SOV) with its only outlet port (Ps2) is allowed.
Dependencies are inferred from the claim text.