ELECTROPNEUMATIC PRESSURE MODULATOR Russian patent published in 2002 - IPC

FIELD: transport engineering; vehicle brake systems antilocking devices. Electropneumatic pressure modulator has pneumatically controlled valves made in form of two separate bushings installed in cylindrical space of housing before inlet and discharge channels and closed by cover in this space. Each bushing has two concentric spaces divided by cylindrical partition at both sides of which circular grooves are made on surfaces of bushings. Circular grooves communicate with concentric spaces. Diaphragms installed in circular grooves of bushings form, together with circular groove of housing and cover, control spaces connected through channels in housing, cover and corresponding electromagnetic valves, with inlet channel of modulator. EFFECT: provision of quick response and accuracy of operation, simplified design and process of manufacture, improved reliability of modulator. 2 dwg