公开(公告)号：US11691600B2

公开(公告)日：2023-07-04

申请号：US16766783

申请日：2018-11-30

Applicant: ZF ACTIVE SAFEY US INC.

Inventor： Blaise J. Ganzel

IPC: B60T7/04 ,  B60T8/40 ,  B60T11/236 ,  B60T13/12 ,  B60T13/62 ,  B60T11/16 ,  B60T13/14 ,  B60T13/68

CPC classification number: B60T7/042 ,  B60T8/4081 ,  B60T11/236 ,  B60T13/12 ,  B60T13/62 ,  B60T11/16 ,  B60T13/145 ,  B60T13/686 ,  B60T2270/82

Abstract: A brake pedal unit includes a housing defining a bore formed therein. An input piston is slidably disposed in the bore. The input piston is connected to a brake pedal such that engagement of the brake pedal causes movement of the input piston within the bore of the housing of the brake pedal unit. The brake pedal unit is defined to be in an at rest position when the brake pedal in not engaged causing movement of the input piston. A primary piston is slidably disposed in the bore for pressurizing a primary chamber. A primary passageway permits fluid communication between the primary chamber and the reservoir, wherein fluid flow through the primary passageway is blocked when the brake pedal unit is in the rest position. A secondary piston is slidably disposed in the bore for pressurizing a secondary chamber. A secondary passageway permits fluid communication between the secondary chamber and the reservoir, wherein fluid flow through the secondary passageway is blocked when the brake pedal unit is in the rest position.

公开(公告)号：US20200307538A1

公开(公告)日：2020-10-01

申请号：US16765590

申请日：2018-11-29

Applicant: ZF ACTIVE SAFEY US INC.

Inventor： Blaise J. Ganzel

IPC: B60T13/68 ,  B60T13/16 ,  B60T13/74 ,  B60T8/40 ,  B60T7/04

Abstract: A brake for operating first, second, third, and fourth wheel brakes includes first and second hydraulic brake circuits each defining a fluid conduit to two of the wheel brakes. Each circuit includes a power transmission unit having a first motor driven piston for pressurizing pressure chambers therein for providing pressurized fluid to the respective fluid conduits. Each circuit includes at least a pair of valves adapted to selectively provide pressurized fluid from the fluid conduits to each one of the wheel brakes. The system includes two separate electronic control units for controlling each of the circuits, namely the power transmission units and the pair of valves.