PURPOSE: To form the spiral current of the fuel constantly let flow in a spiral casing by improving the construction of a spiral jet valve into a reflux type so that spiral energy may be utilized effectively and stable liquid film may be formed for promoting fuel atomization immediately after valve opening.
CONSTITUTION: When an electromagnetic coil 32 is not supplied with power, a plunger is let down by a spring 20, and a jet hole 2 is closed by a needle valve 8. When supplied to a supply passage 13, pressure fuel is introduced tangentially into a spiral casing 12 and set in spiral motion in the casing 12. Next, pressure fuel is let flow back to a fuel source F through a reflux opening 16 provided in a needle valve 8 and a lead-out passage 19. When, the electromagnetic coil 32 is excited and the jet hole 2 is opened due to the rise of the plunger 9 in this condition, the spiral current fuel is jetted through the jet hole 2. Thereby the atomization response of fuel to jet pressure can be raised.
MUTOO TETSUO
SAITOU AKINORI
KAWAMURA KIYOMI
| JPS489819U | 1973-02-03 |