Redundant governor apparatus for a vehicle air brake charging system
AssigneeBendix Commercial Vehicle Systems LLC
InventorsRyan S Hurley, Randy J Salvatora
Life of this patent
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Abstract
A redundant governor apparatus is provided for a vehicle air brake charging system. The apparatus comprises a first governor and a second governor. The apparatus also comprises a number of components arranged to enable (i) the first governor to act as primary and the second governor to act as backup to the first governor when the first governor is unable to act as primary, and (ii) the second governor to act as primary and the first governor to act as backup to the second governor when the second governor is unable to act as primary.
Claims15
A redundant governor apparatus for a vehicle air brake charging system, the apparatus comprising:
- a first governor;
- a second governor;
- and
- a number of components arranged to enable (i) the first governor to act as primary and the second governor to act as backup to the first governor when the first governor is unable to act as primary, and (ii) the second governor to act as primary and the first governor to act as backup to the second governor when the second governor is unable to act as primary;
- wherein the number of components includes a double check valve interconnecting the first and second governors;
- wherein the double check valve is interconnected such that (i) pressurized air from a compressor is unloaded through the double check valve and the first governor when system air pressure is below cut-out pressure and above cut-in pressure of the first governor in a primary mode of operation of the first governor, and (ii) pressurized air from the compressor is unloaded through the double check valve and the second governor when system air pressure is below cut-out pressure and above cut-in pressure of the second governor in a backup mode of operation of the second governor.
A redundant governor apparatus for a vehicle air brake charging system, the apparatus comprising:
- a first governor;
- a second governor;
- and
- means for enabling the first and second governors to be controlled such that (i) either one of the governors can operate as primary in a primary mode of operation and the other one of the governors can operate as backup in a backup mode of operation, and (ii) either mode of operation can be selected as desired;
- wherein the enabling means includes a double check valve interconnecting the first and second governors;
- wherein the double check valve is interconnected such that (i) pressurized air from a compressor is unloaded through the double check valve and the first governor when system air pressure is below cut-out pressure and above cut-in pressure of the first governor in the primary mode of operation of the first governor, and (ii) pressurized air from the compressor is unloaded through the double check valve and the second governor when system air pressure is below cut-out pressure and above cut-in pressure of the second governor in the backup mode of operation of the second governor.
A method of operating first and second governors for a vehicle air brake charging system to provide governor redundancy, the method comprising:
- controlling the first governor to act as primary and the second governor to act as backup to the first governor when the first governor is unable to act as primary;
- controlling the second governor to act as primary and the first governor to act as backup to the second governor when the second governor is unable to act as primary;
- and
- wherein a double check valve interconnects the first and second governors such that (i) pressurized air from a compressor is unloaded through the double check valve and the first governor when system air pressure is below cut-out pressure and above cut-in pressure of the first governor in a primary mode of operation of the first governor, and (ii) pressurized air from the compressor is unloaded through the double check valve and the second governor when system air pressure is below cut-out pressure and above cut-in pressure of the second governor in a backup mode of operation of the second governor.
Dependencies are inferred from the claim text.