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:
Dec. 31, 1996
Filed:
Nov. 22, 1995
Shinya Nozaki, Saitama, JP;
Zexel Corporation, Tokyo, JP;
Abstract
A nozzle is provided wherein the operation of injection hole groups is switched from one to another in accordance with the axial displacement of a spool valve. A nozzle body has a bottomed hole, and a plurality of injection hole groups are provided at different circumferential levels in the side wall of the bottomed hole, the injection holes at different circumferential levels being different in diameter from each other. The valve portion of the spool valve is urged by a spring so that the lower end of the valve portion abuts against the base of the bottomed hole in the normal condition. Moreover, a fuel passage communicates with one of the injection hole groups in the normal condition and communicates with the other injection hole group at a position where the valve portion is displaced axially against the spring force on receiving the pressure of pressurized fuel. In addition, braking means is used to fixedly hold both the axial positions of the spool valve, depending on the operating condition of an engine.