Hydraulic control circuit

• US 20080067770A1
• Filed: 07/24/2007
• Published: 03/20/2008
• Est. Priority Date: 09/19/2006
• Status: Active Grant

• Current Assignee: BWI Company Limited SA (Shougang Corporation)
• Original Assignee: BWI Company Limited SA (Shougang Corporation)
• Inventors: Germain, Philippe A.
• Granted Patent: US 7,735,846 B2
• Time in Patent Office: Days
• US Class Current: 280/124.106
• CPC Class Codes: B60G 17/0162 mainly during a motion involving steering operation, e.g. cornering, overtaking B60G17/0164 takes precedence
• CPC Class Codes: B60G 21/0555 including an actuator inducing vehicle roll
• CPC Class Codes: B60G 2202/135 Stabiliser bar and/or tube
• CPC Class Codes: B60G 2202/413 Hydraulic actuator
• CPC Class Codes: B60G 2400/204 Vehicle speed
• CPC Class Codes: B60G 2800/012 Rolling condition
• CPC Class Codes: B60G 2800/9122 ARS - Anti-Roll System Control

Abstract

A hydraulic control circuit (100) comprises a source (180) of fluid pressure having a fluid inlet (201) and a fluid outlet (202); a fluid reservoir (181) fluidly connected to the fluid inlet of the pressure source; an attenuation means (111) having a fluid inlet (203) fluidly connected to the fluid outlet of the pressure source, and a fluid outlet (204); a pressure control valve (199) fluidly connected to the fluid inlet of the attenuation means and to the fluid reservoir or the fluid inlet of the pressure source; and one or more valves (82-84) fluidly connected to the fluid outlet of the attenuation means.

Claims

1. A hydraulic control circuit comprising a source of fluid pressure having a fluid inlet and a fluid outlet;

a fluid reservoir fluidly connected to the fluid inlet of the pressure source;

an attenuation means having a fluid inlet fluidly connected to the fluid outlet of the pressure source, and a fluid outlet;

a pressure control valve fluidly connected to the fluid inlet of the attenuation means and to the fluid reservoir or the fluid inlet of the pressure source; and

one or more valves fluidly connected to the fluid outlet of the attenuation means.

2. A hydraulic control circuit as claimed in claim 1, wherein the source of fluid pressure is a pump.

3. A hydraulic control circuit as claimed in claim 1 or claim 2, wherein the attenuation means is an attenuation hose.

4. A hydraulic control circuit as claimed in claim 1 or claim 2, wherein the attenuation means is a restricted flow orifice.

5. A vehicle roll control system for a vehicle having a pair of wheels each rotatable on an axle, comprising a torsion bar;

a first arm attached to the torsion bar at one end of the first arm and being connectable to one of the axles of the wheels at the other end of the first arm;

a hydraulic actuator attached to the torsion bar; and

control means connected to the hydraulic actuator and controlling the operation thereof on detection of a predetermined vehicle condition;

wherein the control means comprises a hydraulic control circuit as claimed in any one of claims 1 to 4.