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. 19, 1993
Filed:
Dec. 16, 1992
Harumi Ohori, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A brake control system mounted in an electrical vehicle for controlling a hydraulic brake and a regenerative brake. The hydraulic brake generates a hydraulic pressure depending on an amount of depression of a brake pedal so as to mechanically brake at least drive wheels. The regenerative brake brakes the drive wheels due to a regeneration of a running motor. A reducing valve is provided in a hydraulic pressure transmission path to the drive wheels to be braked by the hydraulic brake. The reducing valve is opened when the hydraulic pressure genrated in a cylinder is at least a valve open value to allow a hydraulic pressure transmission to drive wheel pipings. An ECU calculates a regenerative torque command value depending on a pressure difference between the front and rear of the reducing valve, detected by a sensor, and controls the regenerative brake on the basis of the regenerative torque command value. In turn, a liquid amount corresponding to the hydraulic pressure cut off by the reducing valve is consumed with a similar characteristic to the hydraulic brake by a stroke simulator.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile