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:
Oct. 15, 2019
Filed:
Mar. 22, 2016
Hitachi Automotive Systems, Ltd., Ibaraki, JP;
Yuki Tanaka, Yokohama, JP;
Wataru Yokoyama, Yokohama, JP;
Kimio Nishino, Atsugi, JP;
Masayoshi Okamiya, Atsugi, JP;
Kenichiro Matsubara, Kasumigaura, JP;
HITACHI AUTOMOTIVE SYSTEMS, LTD., Ibaraki, JP;
Abstract
A parking brake control apparatusdrives an electric motorB to advance a pistonaccording to an application request signal from a parking brake switch. The parking brake control apparatusincludes a running state detection portion that calculates a running state about whether a vehicle is running or stopped based on a wheel signal from a wheel speed sensor. When the running state cannot be calculated by the running state detection portion, the parking brake control apparatuscontrols the electric motorB in such a manner that the thrust force of the pistonchanges at a lower time rate of change than when the running state can be calculated.