| 摘要 |
To allow boosting the actuating force even if the control electronics or the electric energy supply fails in a brake-by-wire system, a piston ( 8 ) which can be acted upon by two oppositely directed forces by way of an elastic element ( 6, 7 ) on the input side and by hydraulic pressure in the space ( 11 ) on the outlet side. An arrangement ( 14, 19, 15 ) renders the pressure-supplying module ( 9 ) controllable depending on the position of the piston ( 8 ) that results from the force application, in addition to the electric controllability.
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