Anti skid brake control - uses smaller three way valve to control large flow main valve for heavy vehicle

摘要

A three position electromagnetic control valve provides three operations for the brakes; increase of brake pressure, constant brake pressure and decrease of brake pressure. Such valves have a limited throughput and are usually used on vehicles with a small braking system. The invention provides a similar brake control for a large braking system in which the three way control valve acts as a control to a larger volume flow valve. The control valve regulates the setting of the large volume piston so that a large fluid throughput can be regulated with a fine degree of control.