| 摘要 |
A combustion apparatus 2 has a fuel spraying nozzle 12 , a feed canal 16 and a return canal 17 , both the canals connected to the nozzle, with the former canal 16 feeding a fuel to the nozzle and with the latter canal 17 allowing an unsprayed portion of the fuel to flow back. An electromagnetic pump 18 disposed in the feed canal 16 serves to compress the fuel towards the nozzle 12 , and an injector valve 25 is disposed in the return canal 17 . A controller 40 regulates the operation of the injector valve 25 in the manner of duty-ratio control so as to adjust the flow rate of the fuel being sprayed out of the nozzle 12.
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