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:
Dec. 16, 2003
Filed:
Jan. 23, 2002
Yasunori Sakata, Toyota, JP;
Yasuhito Ishida, Anjo, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
A vehicle hydraulic brake apparatus includes a linear solenoid valve unit for controlling a power hydraulic pressure supplied to a master cylinder from an auxiliary hydraulic pressure source. Master cylinder hydraulic pressure from the master cylinder detected by a pressure sensor is compared with a predetermined reference hydraulic pressure when the linear solenoid valve unit is electrically excited under a condition that the communication between the master cylinder and the wheel cylinders is interrupted by a hydraulic pressure control valve device disposed between the master cylinder and the wheel brake cylinders while the vehicle engine is activated and a brake operating member is not operated. The electric current supplied to the linear solenoid valve unit is corrected in response to a result of this comparison.