Steering control unit with flow amplification

Patent · Tue Jul 26 04:00:00 EDT 1988

OSTI ID:6936979

Haarstad, D M

This patent describes a controller operable to control the flow of fluid from a source of pressurized fluid to a fluid pressure operated device. The controller being of the type including housing means defining an inlet port for connection to the source of pressurized fluid, a return port for connection to a reservoir, and first and second control fluid ports for connection to the fluid pressure operated device. Valve means disposed in the housing means define a neutral position and a first operating position. The housing means and the valve means cooperating to define a main fluid path communicating between the inlet port and the first control fluid port, and between the second control fluid port and the return port when the valve means is the first operating position. Fluid actuated means impart follow-up movement to the valve means proportional to the volume of fluid flow through the fluid actuated means. The fluid actuated means being disposed in series flow relationship in the main fluid path between the inlet port and the first control fluid port. The main fluid path includes a first variable flow control orifice disposed between the inlet port and the fluid actuated means, and having its minimum flow area when the valve means is in the neutral position, and an increasing flow area as the valve means is displaced from the neutral position toward the first operating position. The main fluid path includes a second variable flow control orifice disposed between the fluid actuated means and the first control fluid port.

• Assignee: Eaton Corp., Cleveland, OH
• Patent Number(s): US 4759182
• OSTI ID: 6936979
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330601* -- Vehicle Design Factors-- Body & Chassis
COMPRESSION
CONTROL EQUIPMENT
CONTROL SYSTEMS
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FLUID MECHANICS
FLUIDIC CONTROL DEVICES
FLUIDIC DEVICES
HYDRAULICS
MECHANICS
OPENINGS
OPERATION
ORIFICES
VALVES
VEHICLES