Denso Corporation

Ntn Corporation

Hiroyuki Inoue

Tomoji Matsukawa

Kenji Ito

Katsutoshi Muramatsu

Kouichi Kiyohara

Toshiaki Kaneko

Yoshimi Nishihara

Makoto Ishihara

A bush is disposed on an inner wall of a fixed core. A second spring, which biases a movable core in a valve-closing direction, has one end abutting the bush. The bush is formed separately from the fixed core, and is formed to be movable relative to the fixed core when adjusting a biasing force of the second spring. When a needle is abutting a valve seat, a gap is formed between a movable core first abutting face of the movable core and a flange end face of a flange portion included in the needle. Accordingly, during valve-opening, a relatively large force in a valve-opening direction is applied to the needle. Further, by changing the position of the bush relative to the movable core, the biasing force of the second spring may be adjusted without changing a length of the gap in a central axis direction.

Fuel injection valve

A ceramics material for a sliding member used in the water or brought into contact with water is proposed. It is low in frictional resistance and high in wear resistance and shows a long life when used in such a condition. Also, a disk valve assembly is proposed which has a valve body and a valve seat having sliding surfaces that are high in sliding properties. By sliding the valve body on the valve seat having valve holes, the valve holes can be opened and closed. One of the valve seat and the valve body is made of a self-lubricating ceramics material comprising of an oxide ceramic as a main component, and at least one anti-friction agent selected from the group made up of iron, nickel, cobalt and their oxides, nitrides and carbides. The other of the valve seat and the valve body is made of an aluminum oxide ceramics material and has a larger slide contact area than the one of the valve seat and the valve body.

Sintered ceramics material and disk valve assembly

Growing community of inventors

Gifu, Japan

Hiroyuki Inoue