The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 20, 2024
Filed:
Sep. 30, 2019
Volvo Truck Corporation, Gothenburg, SE;
Hugo Bebon, Vaulx en Velin, FR;
Nathan Prod'Homme, Lyons, FR;
VOLVO TRUCK CORPORATION, Gothenburg, SE;
Abstract
A method for controlling the rotational speed (S) of an electric motor driven air compressor () that supplies compressed air to a pneumatically operated system () of a vehicle (), characterized by the preliminary steps of: a) determining the efficiency (e) of the air compressor () for different values (Si) of the rotational speed (S) of the air compressor (), the efficiency (e) of the air compressor () corresponding to the ratio between the pneumatic power (PI) produced by the air compressor () and the power (PO) given to the air compressor (); b) determining one or several specific values (S, S) among said different values (Si), for which the efficiency (e) of the air compressor () is higher than a threshold value (emin) and/or comparatively higher than those determined for values (SI, S) close to said specific value(s) (S, S); the preliminary steps a) and b) being preferably implemented only once; and characterized by the further repetitive steps of: c) determining the air consumption rate of the pneumatically operated system () receiving compressed air from the air compressor (); d) determining a minimum rotational speed (Smin) of the air compressor () to obtain an air production rate of the air compressor () that is equal or substantially equal to said determined air consumption rate; e) determining if the specific value or one of the specific values (S, S) is greater than said determined minimum rotational speed (Smin); f) if no specific value is greater than said determined minimum rotational speed (Smin), controlling the rotational speed (S) of the air compressor () based on said minimum rotational speed (Smin); g) if only one specific value (S) is greater than said determined minimum rotational speed (Smin), controlling the rotational speed (S) of the air compressor () based on said only one specific value (S); h) if a plurality of specific values (S, S) is greater than said determined minimum rotational speed (Smin), determining the specific value (S) with the best efficiency among said plurality of specific values (S, S) and controlling the rotational speed (S) of the air compressor () based on said specific value (S) with the best efficiency.