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:
Apr. 06, 2004
Filed:
Apr. 07, 2003
Masayori Ishimoto, Saitama Prefecture, JP;
Abstract
An object of the present invention is to provide an accumulator fuel injection system comprising a pressure increasing unit and a pressure increasing common rail , in which leaked fuel is recirculated from a high pressure side to a low pressure side, and which is capable of reducing the amount of fuel that must be delivered under pressure by a low pressure pump . The focus of the present invention is to return high pressure leaked fuel to between the low pressure pump and a high pressure pump . The accumulator fuel injection system of the present invention comprises the low pressure pump for delivering fuel under pressure from a fuel tank , the high pressure pump for changing the fuel from the low pressure pump into high pressure fuel, an accumulator (common rail) for accumulating the high pressure fuel from the high pressure pump at a predetermined pressure, an injector which is connected to the accumulator for injecting the high pressure fuel, and the pressure increasing unit which is provided between the injector and the accumulator for further increasing the pressure of the high pressure fuel. Leaked fuel from the pressure increasing unit may be recirculated to the downstream side of the low pressure pump through a unit leakage passage