Fuel injection valve

• Main Authors: YOSHIO OKAMOTO, ATSUSHI NAKAI, EIJI ISHII, NORIYUKI MAEKAWA, TAKAHIRO SAITO, KAZUKI YOSHIMURA
• Format: Patent
• Language: Chinese; English
• Published: 12.02.2014
• Subjects: BLASTING; COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; WEAPONS

The invention provides a fuel injection valve in which the uniformity of a swirl flow in the circumferential direction is enhanced. The fuel injection valve of the invention includes a swirling chamber having an inner wall surface comprised of a helical curve and a passage for swirling for guiding fuel into the swirling chamber. The fuel injection valve is so formed that the center of a circle as the basis of the helical curve and the center of a fuel injection hole open in the swirling chamber agree with each other. A connecting portion of two walls of intersected inner wall of the passage for swirling and a downstream side of the swirling chamber is between a segment which is drawn from the center of the fuel injection hole to a spot where curvature of the swirling chamber begins to change and a tangent line of a side wall of the fuel injection hole which is drawn parallel with the segment. The radius of the shape of the swirling chamber is defined according to a flow storage formulas on a radial direction