| 摘要 |
PURPOSE:To make it possible to change the supply volume of fuel without changing the supply pressure and hold the air to fuel ratio at a certain value regardless of the fuel injection volume by providing transfer means which transfers a valve body to a location which corresponds to the amount of the fuel injection volume and controlling the amount of air to be mixed with the fuel to control the air to fuel ratio to a specified value. CONSTITUTION:When a gun type burner 10 is ignited, fuel is injected from an injection port 18. When the temperature of the hot air is lower than a set temperature, electric power to a heater 90 is increased. A bimetal 88 expands and bends by the generation of heat in the heater 90. With those expansion and bending a rod section 44 and valve body 36 are slid forward, and a needle section 38 reduces the area of the opening at a small diameter section 35 and the fuel injection volume is increased. From the amount of the movement of the rod section 44, the volume F of injected fuel is calculated and the air volume Q which will bring the ratio of the air and fuel to a specified ratio is calculated, and then the rotational speed NEo of a fan motor 124 is specified. |
