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:
May. 28, 2019
Filed:
Dec. 25, 2015
Hitachi Automotive Systems, Ltd., Ibaraki, JP;
HITACHI AUTOMOTIVE SYSTEMS, LTD., Ibaraki, JP;
Abstract
A brake device having an electric parking brake function, capable of appropriately performing stepwise increase control for a clamping force. A control unit including a computing circuit (), a memory (), and each motor drive circuit () of a parking brake control device () includes a stepwise increase control unit configured to increase the clamping force generated by brake pads () to a disc rotor () in a stepwise manner. When start of contact between the disc rotor () and the brake pads () caused by feeding of power from the parking brake control device () to an electric motor (B) is detected based on a motor current from a current sensor unit (), the stepwise increase control unit performs control for repeatedly feeding and stopping power to the electric motor (B) to increase the clamping force in a stepwise manner in accordance with a predefined processing procedure.