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. 15, 1985
Filed:
Aug. 01, 1984
Nobuyuki Nakajima, Higashimatsuyama, JP;
Keiichi Yamada, Higashimatsuyama, JP;
Diesel Kiki Co., Ltd., Tokyo, JP;
Abstract
A fuel injection valve for internal combustion engines wherein a nozzle needle is slidably fitted in a nozzle body so as to alternately close and open nozzle holes formed therein. A selector valve is axially slidably fitted through the nozzle needle to selectively close or open second nozzle holes formed in the nozzle body. While the nozzle needle has a predetermined valve opening pressure set by a nozzle spring, the selector valve is controlled to operate in response to operating conditions of the engine by control means such that the second nozzle holes are opened in predetermined operating regions of the engine. Thus, the overall discharge area of the nozzle holes can be controlled to values appropriate to operating conditions of the engine. Preferably, the selector valve comprises a spool valve which can assume a seated position wherein its spool is fitted in an axial through hole formed in the tip of the nozzle body to close the second nozzle holes opening in the peripheral wall of the axial through hole, and a lifted position wherein the spool is disengaged from the axial through hole to open the second nozzle holes.