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:
Sep. 19, 2023
Filed:
Mar. 23, 2023
Subaru Corporation, Tokyo, JP;
SUBARU CORPORATION, Tokyo, JP;
Abstract
A driving force estimation apparatus includes a free rolling rotation speed output unit, an actual rotation speed detector, a slip rate calculation unit, a driving force estimation unit, a slip angle output unit, and a stiffness correction unit. The free rolling rotation speed output unit outputs free rolling rotation speeds of front and rear wheels in a free rolling state devoid of a braking or driving force. The slip rate calculation unit calculates slip rates of the front and rear wheels, from the free rolling rotation speeds and actual rotation speeds. The driving force estimation unit estimates driving forces of the front and rear wheels, using driving or braking stiffnesses of the front and rear wheels and the slip rates. The slip angle output unit outputs slip angles of the front and rear wheels. The stiffness correction unit corrects the driving or braking stiffnesses based on the slip angles.