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. 29, 2008
Filed:
Jun. 27, 2001
Applicants:
Keizo Akutagawa, Tokyo, JP;
Hiroki Sawada, Tokyo, JP;
Inventors:
Keizo Akutagawa, Tokyo, JP;
Hiroki Sawada, Tokyo, JP;
Assignee:
Kabushiki Kaisha Bridgestone, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B62K 28/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
When feedback control is carried out to ensure that the drive torque of an electric motor for driving each wheel of a vehicle should be equal to a motor torque instruction value, micro-vibration is applied to each tire by superposing a micro-vibration signal to a drive signal for the above electric motor to change the slip ratio-friction characteristics themselves of the tire to control friction force between the tire and the surface of a road, thereby controlling the running performance of the vehicle.