US 12,145,416 B2
Air supply control arrangement for a heavy-duty vehicle comprising a lift axle
Amarnath Jeyakar M R, Surandai (IN); Sunil Angadi, Dharwad (IN); and Dilip Kumar, Bengaluru (IN)
Assigned to VOLVO TRUCK CORPORATION, Gothenburg (SE)
Filed by Volvo Truck Corporation, Gothenburg (SE)
Filed on Jan. 26, 2024, as Appl. No. 18/423,658.
Claims priority of application No. 23155572 (EP), filed on Feb. 8, 2023.
Prior Publication US 2024/0262153 A1, Aug. 8, 2024
Int. Cl. B60G 17/052 (2006.01); B60G 17/015 (2006.01)
CPC B60G 17/0523 (2013.01) [B60G 17/0155 (2013.01); B60G 2202/152 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An air supply control arrangement for a heavy-duty vehicle comprising a lift axle which comprises a brake chamber, the air supply control arrangement comprising:
an electronically controlled brake valve device, which when opened allows pressurized air received in the electronically controlled brake valve device to be passed to the brake chamber, and when closed prevents pressurized air received in the electronically controlled brake valve device from being passed to the brake chamber, wherein the degree of the opening and/or the duration of the opening of the electronically controlled brake valve device is controlled by an electronic brake request received by the electronically controlled brake valve device,
a supply passage,
a pressurized air source for supplying pressurized air to the electronically controlled brake valve device along said supply passage,
a pilot control valve provided in said supply passage between the pressurized air source and the electronically controlled brake valve device, wherein the pilot control valve has a closed first state in which air from the pressurized air source is prevented from reaching the electronically controlled brake valve device and an open second state in which air from the pressurized air source is allowed to be received by the electronically controlled brake valve device, and
a pressure-responsive element configured to actuate the pilot control valve and configured to be in fluid communication with a lift bellow that controls the condition of the lift axle, such that when the pressure in the lift bellow is increased so that the lift axle is raised to a lift condition then the pressure-responsive element is activated to actuate the pilot control valve to move to said closed first state, and when the pressure in the lift bellow is reduced so that the lift axle is lowered to a ride condition then the pressure-responsive element is deactivated to allow the pilot control valve to move to said open second state.