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:
Apr. 28, 2026
Filed:
May. 08, 2023
Subaru Corporation, Tokyo, JP;
Yoshinobu Yamazaki, Tokyo, JP;
Masami Oguri, Tokyo, JP;
Akihiro Nabeshima, Tokyo, JP;
Yoshiyuki Jin, Tokyo, JP;
Takeshi Yoneda, Tokyo, JP;
Fumiya Sato, Tokyo, JP;
Hiroshi Kusano, Tokyo, JP;
Keigo Yamada, Tokyo, JP;
Takumi Araki, Tokyo, JP;
Shuntaro Miura, Tokyo, JP;
SUBARU CORPORATION, Tokyo, JP;
Abstract
A drive system for a four-wheel drive vehicle including a friction brake system includes a first motor and a second motor, a propeller shaft for transmitting power between a front-wheel side and a rear-wheel side, a first differential mechanism configured to divide output torque of the first motor between a left wheel on one side of the front-wheel side and the rear-wheel side and the other side, a second differential mechanism configured to divide output torque of the second motor between a right wheel on the one side and the other side, and a control device for controlling regenerative braking force related to the first motor and the second motor and friction braking force related to the friction brake system. The first and second differential mechanisms are configured such that the ratio of output torque allocated to the front-wheel side is 50% or more.