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:
Jun. 19, 2018
Filed:
Jan. 25, 2016
Mazda Motor Corporation, Aki-gun, Hiroshima, JP;
Tetsushi Marutani, Higashihiroshima, JP;
Hiraku Nishikawa, Hiroshima, JP;
Mazda Motor Corporation, Aki-gun, Hiroshima, JP;
Abstract
A four-wheel drive vehicle is provided, including an engine with an operating mode that is switchable between all-cylinder and reduced-cylinder operating modes, a torque transmission assembly for transmitting an output torque of an engine to main drive wheels and auxiliary drive wheels, a torque ratio adjusting device included in the torque transmission assembly and configured to adjust a ratio of the output torque distributed to the auxiliary drive wheels, and controller that executes a noise suppression module for increasing the torque ratio provided to the auxiliary drive wheels by the torque ratio adjusting device so as to suppress noise generation at the torque transmission assembly, in the all-cylinder and reduced-cylinder operating modes. The noise suppression device changes the torque ratio provided to the auxiliary drive wheels according to engine operating ranges where the torque transmission assembly is in a noise generating state in the all-cylinder and reduced-cylinder operating modes, respectively.