| 摘要 |
Provided is a light-weight engine fan that can blow high temperature air. A feed air flow (W), after passing through and cooling a region having a cylinder (11), passes through a region having a muffler (40) and then flows through a nozzle (2) to the front. For a two-cycle engine, the exhaust gas contains unburned fuel because the exhaust gas is mixed with an air-fuel mixture that is introduced into a combustion chamber during scavenging. Because the reaction that breaks down the unburned fuel using a catalyst material (42) is an exothermic reaction, the amount of heat generated in the muffler (40) is large and the muffler (40) is actually at a higher temperature than the cylinder (11). Thus, by disposing the muffler (40) on the flow route of the feed air flow (W), the temperature of the feed air flow (W) can be made high. The engine fan (1) can increase the amount of unburned fuel flowing to the muffler (40) without changing the throttle opening, thereby increasing the amount of heat generated by the catalyst material (42). |
