Hitachi, Ltd.

Hitachi Automotive Engineering Co., Ltd.

Hiroyuki Ando

Yoshio Okamoto

Haruo Watanabe

Eiji Hamashima

Yozo Nakamura

Tokuo Kosuge

Kyoichi Uchiyama

Akashi Terasaki

Akira Onishi

Mineo Kashiwaya

Satoshi Suzuki

Youzou Nakamura

A fuel injection valve (10) has a valve member (2) arranged to be controllably movable in an axial direction toward and away from a circular valve seat (4) so as to control fuel flow from a port (5) downstream from the valve seat. An axial fuel passage (7) extends from upstream of the valve seat (4) through a clearance between the seating portion and the seat (4) for producing a substantially non-swirling fuel flow from the port (5). A transverse fuel passage (8) is also provided and the transverse fuel passage extends transversely to the axial passage and communicates with the axial fuel passage at a location offset to a diameter of the valve seat for producing a swirling fuel flow from the port (5). A combination of swirling and non-swirling fuel flow is thus supplied by the port (5), for producing finer fuel droplets of improved distribution.

Fuel injection valve

An electromagnetic fuel injection valve in which an area of an annular gap formed by a ball valve and a valve seat when the ball valve is lifted is made smaller than cross sectional area of grooves provided on a fuel swirling element which gives fuel supplied a swirling force and further is made larger than a cross sectional area of a fuel injection port, whereby the fuel is injected with an excellent atomizing characteristic.

Electromagnetic fuel injection valve

A system for controlling an exhaust gas-driven supercharger used in an internal combustion engine for an automotive vehicle includes an exhaust gas bypass passage connecting between selected portions of the exhaust gas conduit upstream and downstream of a turbine of the supercharger, and an exhaust bypass valve disposed midway of the exhaust gas bypass passage for controlling the quantity of engine exhaust gases. In the supercharger control system, an actuator responsive to a digital control signal is employed for actuating the exhaust bypass valve. A microcomputer calculates the opening of the exhaust bypass valve so that the supercharged air pressure may not exceed the critical point giving rise to knocking, and such a digital control output signal is applied to energize the actuator so that the supercharged air pressure can be controlled with highest efficiency over a wide operation range of the engine.

Control system for exhaust gas-driven supercharger used in vehicle engine

Growing community of inventors

Katsuta, Japan

Hiroyuki Ando