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:
Nov. 02, 1999
Filed:
Oct. 28, 1997
Toshiyuki Hasegawa, Saitama-ken, JP;
Takashi Kobayashi, Saitama-ken, JP;
ZEXEL Corporation, Tokyo, JP;
Abstract
A fuel injection nozzle with which it is possible to control the nozzle hole area and the injection period so that the injection pressure, the injection period and the injection amount are suited to the load and the speed of the engine and with which it is possible to conduct a pilot injection and a main injection certainly and precisely by simple control using a small actuator just by rotating this actuator in one direction. The fuel injection nozzle is of a type having a rotary valve disposed in a well, the rotary valve being rotated by an actuator to adjust the opening area of the nozzle holes formed in an enclosing wall bounding the well; the enclosing wall has a conical inner surface and the rotary valve has at its upper end a pressure-receiving surface for receiving the pressure of the pressurized fuel and has at its circumferential periphery a conical seat surface of an angle matching the angle of the conical inner surface of the enclosing wall. A plurality of pairs of fuel passages each pair consisting of a first passage and a second passage whose opening area is smaller than that of the first passage each passage having one end opening at the pressure-receiving surface and the other end connectable with the nozzle holes are provided in the rotary valve spaced in the direction of its rotation.