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:
Feb. 16, 1993
Filed:
Nov. 14, 1991
Eiji Hashimoto, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
An apparatus for controlling a fuel pressure suitable for a direct injection type fuel injection internal combustion engine, using gasoline as a fuel. A low pressure pump and high pressure pump from a fuel tank are arranged in series between a reservoir tank and fuel injectors. A pressure at the output of the low pressure pump is detected to determine if the fuel tank is empty, and when it is determined from the pressure at the outlet of the small pump that the fuel tank is empty, the operation of the high pressure pump is stopped to thereby prevent a generation of bubbles in the reservoir tank. A fuel injection is stopped when there is a drop in the pressure in the reservoir tank.