| 摘要 |
PCT No. PCT/AU93/00672 Sec. 371 Date Oct. 11, 1995 Sec. 102(e) Date Oct. 11, 1995 PCT Filed Dec. 21, 1993 PCT Pub. No. WO94/15092 PCT Pub. Date Jul. 7, 1994A gas injector for a gas fueled internal combustion engine having a valve member that is movable between a first or closed position, in which a flow of gas through the injector is prevented, and a second or open position in which a flow of gas is permitted through the injector. A solenoid actuator moves the valve member from the first to the second position responsive to an electrical control signal which is modulated to precisely control the quantity of gas to be delivered by the gas injector to the internal combustion engine. The valve member includes a hollow valve stem having a first opening at one end and a second opening in the form of three radial apertures at the other end to allow a flow of gas through the valve member in use. The valve stem is provided with an annular flange of magnetic material at one end, which faces the end face of the solenoid actuator and forms the armature of the magnetic circuit formed by the solenoid actuator. An outer casing of the injector is manufactured of magnetic material and includes a wall immediately adjacent a coil so that, in use, together with a core member and the annular flange, it forms part of the magnetic circuit of the injector. |
