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:
Jan. 13, 1987
Filed:
May. 03, 1985
Yoichi Hara, Hiratsuka, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A fuel pressure control system has a fuel pressure regulator having a reference chamber and a fuel chamber separated by a diaphragm which opens and close a fuel return passage in accordance with a pressure difference between both chambers. There are provided an accumulator for containing an air pressurized by a supercharger, and a temperature sensor for sensing a temperature of the fuel. A control unit normally puts a three-way electromagnetic fuel pressure control valve in a first position to introduce an intake manifold vacuum into the reference chamber. When the temperature sensed by the temperature sensor is higher than a predetermined value, the control unit puts the valve in a second position to introduce a high pressure air in the accumulator into the reference chamber to prevent vapor lock by increasing the fuel pressure.