Patent ID: 8366208

Claim:
Brake unit for a hydraulic, single-circuit or multi-circuit braking system of a land vehicle, comprising: fluid on-off valves ( 108 ) to be operated electrically, an electronic control circuit (ECU) to provide control signals for the fluid on-off valves ( 108 ) to modulate a hydraulic pressure in brake circuits (I, II), a unit body ( 110 ), comprised of at least two ceramic boards ( 110 a , 110 b , 110 c ) connected to each other, and which has the fluid on-off valves ( 108 ), hydraulic connecting lines ( 112 ) between the fluid on-off valves ( 108 ) being incorporated in the boards ( 110 a , 110 b , 110 c ) and formed as recesses or cutouts of the boards ( 110 a , 110 b , 110 c ) or their metal layer ( 110 a ′, 110 a ″), and at least one of the boards ( 110 a , 110 b , 110 c ) being used as the carrier board for electrical/electronic components and electrical connecting lines of the electronic control circuit (ECU), the fluid on-off valves ( 108 ) are incorporated in the boards ( 110 a , 110 b , 110 c ), which are connected to each other, of the unit body ( 11 ), each fluid on-off valve ( 108 ) having a valve seat ( 118 ), and a valve element ( 120 ), which is a ceramic body, which must be pressed into the valve seat ( 118 ) to seal the fluid on-off valve, and lifted away from the valve seat to open the fluid on-off valve.