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:
Jul. 26, 1994
Filed:
Jan. 28, 1993
Mazda Motor Corporation, Hiroshima, JP;
Abstract
An automatic braking system for a motor vehicle includes a sensor for detecting a distance and a relative speed between the vehicle and an obstacle in front of the vehicle. A judging device for judging an alarm sounding region and a region in which the vehicle has a possibility of contact with the obstacle, based on the detected distance and the relative speed and an automatic brake for automatically braking respective wheels when the judging device judges the region in which the vehicle has a possibility of the contact with the obstacle are provided. The automatic brake incudes a vacuum type booster which has a first chamber to which negative pressure is introduced and a second chamber to which atmospheric pressure is introduced. The first chamber is connected to the down stream portion, from a throttle valve, in an intake path of an engine. The booster uses a pressure difference between the negative pressure and the atmospheric pressure. A device for increasing the negative pressure in the first chamber of the automatic brake prior to the operation of the automatic brake is also provided.