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. 13, 2001
Filed:
Nov. 08, 1999
Masanori Hirose, Okazaki, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A hydraulically operated braking system including a hydraulic pump operated by an electric motor, and a motor control device connected to the electric motor and controlling an electric current to be applied to the electric motor, by pulse width modulation, such that a PWM frequency at which the electric current is controlled by the pulse width modulation is set at a relatively high value higher than an upper audibility limit while the braking system is placed in a normal braking operation during which the generation of an operating noise of the braking system is not allowed, and at a relatively low value not higher than the upper audibility limit while the braking system is placed in a noise-tolerable braking operation during which the generation of the operating noise is allowed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile