Patent ID: 11932228
Assignee: BENDIX COMMERCIAL VEHICLE SYSTEMS LLC
Field: Transport (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 0:
1. A parking brake apparatus for an autonomously drivable vehicle having components of a parking brake system for applying a parking brake, the parking apparatus comprising:
a primary parking brake controller arranged to control one or more parking brake valves to enable one or more parking brake springs to apply the parking brake in response to a signal requesting the parking brake to be applied;
a redundant parking brake controller controlling the one or more parking brake valves to enable the one or more parking brake springs to apply the parking brake when the primary parking brake controller is unable to cause the parking brake to be applied when the vehicle is autonomously driven and without requiring any manual action from an occupant of the autonomously driven vehicle;
a first electronically controlled valve disposed between a primary compressed air supply and the one or more parking brake valves; wherein the redundant parking brake controller is arranged to provide a first control signal to the first electronically controlled valve in response to the primary parking brake controller being unable to cause the parking brake to be applied; and
a second electronically controlled valve disposed between a secondary compressed air supply and the one or more parking brake valves; wherein the redundant parking brake controller is arranged to provide a second control signal to the second electronically controlled valve in response to the primary parking brake controller being unable to cause the parking brake to be applied.