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:
Oct. 12, 1993
Filed:
Jun. 12, 1992
Hiroshi Nakagawa, Nagasaki, JP;
Yuuji Oda, Nagasaki, JP;
Mitsubishi Jukogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
In a system and method for feeding fuel, consisting of fine particles of solid fuel such as pulverized coal or the like and fuel oil, a predetermined amount of the fuel oil is fed into an oil reservoir within an injection valve through a control valve, and this fuel oil is injected through a nozzle hole of the injection valve with the aid of oil pressurized by a high-pressure pump. Only the above-mentioned fuel oil is injected, i.e. the pressurized oil is not injected. Also the aforementioned fuel oil never enters the high-pressure pump so as to prevent the plunger of the pump from seizing. The oil fed to the oil reservoir is returned to an oil tank via a circulation valve, and so, deterioration of the oil can be precluded. In addition, since the control valve is regulated by a signal indicating a position of a control rack which regulates the amount of oil delivered by the high-pressure pump, fuel oil in an amount corresponding to the amount of oil delivered by the high-pressure pump is sent to the aforementioned oil reservoir. Therefore, only the above-mentioned fuel oil will be reliably injected.