| 摘要 |
<p>PURPOSE:To prevent from a fuel injection valve, etc. from being damaged by burning, by providing, in the vicinity of the fuel injection valve, a selector valve device which communicates between an air supply passage and a mixture supply passage upon operation of a burner while communicates between the air supply passage and an air relieving passage upon resting of the burner. CONSTITUTION:The downstream end of an air supply passage 26 is communicated with a mixture supply passage 23 in the vicinity of the jet port of a fuel injection valve 24, and as well an air relieving passage 29 is communicated with the mixture supply passage 23. An air stream selector valve device 28 closed the air relieving passage 29 upon operation of a burner so that the mixture of fuel and air is fed to the burner through the mixture supply passage 23: Further, it closes the mixture supply passage 29 downstream of the air relieving passage 29 upon resting of the burner so that air passes in the vicinity of the jet port of the fuel injection valve and flows into the air relieving passage 29.</p> |
