Patent ID: 11904820
Assignee: ZF ACTIVE SAFETY US INC.
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 7:
8. The brake system of claim 1, wherein each power transmission unit includes:
a single acting plunger assembly including a ball screw, a ball nut selectively driven by the ball screw, a plunger piston operatively coupled to the ball nut, a housing at least partially enclosing the plunger piston, the ball screw, and the ball nut, a plunger chamber at least partially defined by the housing and a face of the plunger piston, and an output channel in fluid communication between the plunger chamber and at least one of the reservoir and a hydraulically actuated wheel brake corresponding to the power transmission unit, the plunger chamber being configured to contain hydraulic fluid and selectively pressurized by reciprocal motion of the plunger piston with respect to the housing; and
an electric motor for selectively driving the ball screw of the single acting plunger assembly to responsively reciprocate the plunger piston within the plunger chamber.