Two-circuit pressure control unit
AssigneeITT Industries, Inc.
InventorsBernd Schopper, Peter Tandler
Life of this patent
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Abstract
Twin brake force control units, for a two circuit brake system are known in which the initial control force is changeable dependent on the vehicle load. The control force is distributed to the control pistons by a lever. Due to tolerances and erosion of the individual elements considerable differences in pressure in both brake circuits may occur. This is overcome according to the present invention by providing a lever which directly operates upon both control pistons and which is rotatable about an axis perpendicular to the shifting movement of the control pistons and which is additionally rotatable about its longitudinal axis. This double rotation of the lever is accomplished by supporting the lever in a spherical joint.
Claims36
A two-circuit pressure control unit having a change-over point which is externally adjusted, said unit being employed in a two-circuit hydraulic brake system comprising:
- a housing containing two blind end bores having parallel longitudinal axes, each of said bores containing therein a control piston having an actuating pin projecting therefrom out of an associated one of said bores, each of said control pistons being associated with a different one of said two brake circuits;
- and
- a common control lever having a control force acting on one end thereof directly acting on both of said actuating pins for even distribution of said control force to said control pistons, said control lever being supported by said housing at a point spaced from said actuating pins to enable tilting of said control lever about a first axis corresponding to its longitudinal axis and a second axis perpendicular to said first axis at said point.
Dependencies are inferred from the claim text.