| 摘要 |
A tandem brake power control device for vehicle brake systems has a first step piston (2), a floating piston (4) and a second step piston (5), which can be pressed against a stop (36), axially in series in a housing (1). The control valve (20) of a first brake circuit (3) is actuated as a function of the relative movement between the first step piston (2) and the floating piston (4). The control valve (39) of a second brake circuit (6) is actuated as a function of the relative movement between second step piston (5) and floating piston (4). Both step pistons face the floating piston (4) with their end face (22, 42) exposed to the output pressure of the associated brake circuits. In this way all three pistons (2, 4, 5) can be guided exclusively in parts fixed to the housing. In particular both step pistons (2, 5) can be of identical design and fitted laterally inverted in relation to one another. <IMAGE>
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