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:
Aug. 26, 2014
Filed:
Oct. 16, 2009
Kensho Kato, Kanagawa, JP;
Hisao Ogawa, Kanagawa, JP;
Kensho Kato, Kanagawa, JP;
Hisao Ogawa, Kanagawa, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
A device for controlling a variation in pressure upstream of a common rail, the device being an extremely simple and small-sized compact device which is used in a pressure accumulating common rail type fuel injection apparatus. The device for controlling a variation in pressure upstream of a common rail can supply high-pressure fuel to the common rail in a stable pressure state by preventing pulsation of a high-pressure pump from occurring in each cylinder of the pump and also preventing generation of a surge pressure caused by opening and closing of a check valve. The device is provided with a secondary common rail which is connected to the fuel outlets of the check valves each provided to each of the cylinders of the high-pressure pump and which has a volume equal to or less than the volume of the common rail, and the device is also provided with injection pipes which connect between the common rail and the fuel outlets of the secondary common rail. The number of the injection pipes is set to be less than the number of the check valves each provided to each of the cylinders of the high-pressure pump.