Patent ID: 11938915
Assignee: VOLVO TRUCK CORPORATION
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 17:
18. A braking arrangement for a vehicle, comprising:
a source of compressed air;
a drive shaft for the vehicle;
a brake associated with a drive axle of the vehicle and connected to the source of compressed air by an air line;
an operator controlled valve in the air line between the source of compressed air and the brake;
a proportioning valve in the air line between the operator controlled valve and the brake; and
a compressor driven by the drive shaft and having an outlet connected to a control port of the proportioning valve;
an antilock brake system (ABS) associated with the brake;
a controller;
means for determining whether the ABS is operating properly and adapted to send a signal to the controller, and
a controlled valve disposed between the outlet of the compressor and the control port of the proportioning valve, the controller being configured to open the controlled valve upon receipt of a signal that the ABS is not operating properly.