| 摘要 |
PURPOSE:To vary an air-fuel mixture ratio in time of starting according to ambient temperature and engine temperature as well as to make a state of good engine condition attainable all the time, by installing a temperature on-off device in an air passage performing a bleed action. CONSTITUTION:A first air chamber 4 and a second air chamber 5 are set up at an interval kept up and down around a starting fuel passage pipe 3 connecting a starting suction passage 1 and a starting fuel chamber 2 each other. Each of these chambers 4 and 5 and the starting fuel passage pipe 3 are all connected with each other via each of bleed holes 6. Likewise, the first air chamber 4 and the second air chamber 5 are connected by an air passage 7 on which a temperature on-off device 8 is installed. When ambient temperature and engine temperature are both high, a bimetal valve 8b opens, performing a bleed action, and thereby bleed holes 6 increases in number, whereby an air-fuel mixture ratio comes rare. In contrast to this, when these temperatures are low, the bimetal valve 8b closes so that the air-fuel mixture comes thick. |
