Fuel injector
AssigneesHitachi, Ltd., Hitachi Car Engineering Co., Ltd.
InventorsMotoyuki Abe, Yoshio Okamoto, Makoto Yamakado, Tohru Ishikawa, Shuichi Shimizu
Life of this patent
Estimating the term…
Abstract
To supply a method that enables the inclination of the injection direction and the distribution of the penetration force of spray to be adjusted over a wide range, and an axially symmetrical spray shape to be obtained even when the injection hole is inclined, or the shape of the spray to be changed without inclining the injection hole. To provide a fuel passageway 203 as a swirling force adjustment means between the valve seat 201 and injection hole 101 of the fuel injector. This swirling force adjustment means adjusts the distribution of the swirling force of the fuel flowing into injection hole 101, and thus adjusts the spray shape obtained as a result.
Claims17
A fuel injector equipped with an injection hole for injecting a fuel, and with a swirling force impartment means at an upstream side of said injection hole to impart a swirling force to the fuel, is characterized in that
- said fuel injector further comprising:
- a means for changing a distribution of said swirling force which has been imparted by said swirling force impartment means at said upstream side of said injection hole is changed in a swirling direction of the fuel.
A fuel injector is characterized in that
- from an upstream side of a fuel passageway in order, a fuel passageway portion that imparts a swirling force to a fuel, a seat portion that is opened and closed by a valve seat and a valve body, and an injection hole portion from which the fuel is injected, are arranged, and
- said fuel passageway portion is located between said seat portion and said injection hole so that a center line of said fuel passageway portion is eccentric with respect to a center of an edge at an entrance side of said injection hole.
A fuel injector comprising:
- a means having an injection hole for injecting a fuel and imparts a swirling force to the fuel from an upstream side of said injection hole,
- a valve seat,
- a valve body for opening and closing a fuel passageway between said injection hole and said valve seat, and
- a means for driving said valve body,
- said fuel injector is characterized in that
- a swirling force adjustment means for adjusting said swirling force that has been imparted by said swirling force impartment means is provided in said fuel passageway which ranges from said valve seat to said injection hole.
Dependencies are inferred from the claim text.