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:
Nov. 05, 2024
Filed:
Mar. 24, 2021
Applicant:
Hitachi Astemo, Ltd., Hitachinaka, JP;
Inventors:
Daisuke Kojima, Hitachinaka, JP;
Norikazu Matsuzaki, Hitachinaka, JP;
Masayuki Kikawa, Hitachinaka, JP;
Assignee:
HITACHI ASTEMO, LTD., Ibaraki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60T 13/74 (2006.01); H02P 29/00 (2016.01); H02P 29/60 (2016.01);
U.S. Cl.
CPC ...
B60T 13/74 (2013.01); H02P 29/0022 (2013.01); H02P 29/60 (2016.02);
Abstract
A parking brake control device is configured to, when releasing a hold on a braking force, energize an electric motor, and change a drive time of the electric motor based on a current change amount in a predetermined interval after a predetermined time has elapsed since a current value of the electric motor starts to decrease after increasing and a current value at which the current change amount of the electric motor converges to a predetermined value or less.