Combustion apparatus
AssigneeNoritz Corporation
InventorsKimiaki Asano, Hitoshi Hara, Tetsurou Hamada, Toshihiro Hori, Hiroki Hasegawa
Life of this patent
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Abstract
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 later canal 17 allowing an unsprayed portion of the fuel to flow back. An electro-magnetic 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 low rate at which the fuel is sprayed out from the nozzle is controlled by a controlling means 40 by regulating the mode of opening and closing the valve body 33 of injector valve 25.
Claims11
A combustion apparatus comprising:
- a spraying means for spraying a fuel,
- a feed channel for feeding the fuel to the spraying means,
- a compressing means disposed in the feed channel so as to compress the fuel flowing towards the spraying means,
- the spraying means being a nozzle having a spray mouth, an internal feed path and an internal return path,
- a valve in the feed channel through which fuel is discharged towards the spraying means,
- a return channel connected to the spraying means so as to extend back to a junction where the return channel merges into the feed channel on an upstream side of the compressing means, and
- an intermittently operating valve disposed in the return channel so as to be closed and opened intermittently or periodically,
- so that a portion of the fuel once delivered to the spraying means through the feed channel is allowed to flow back through the internal return path and the return channel into the junction,
- wherein the intermittently operating valve is an injector valve comprising a throttling valve body capable of closing and opening the return channel to regulate a flow rate of the fuel,
- the intermittently operating valve cooperating with the valve in the feed channel to control spraying of fuel into the combustion chamber at a desired rate.
A combustion apparatus comprising:
- a spraying means for spraying a fuel,
- a feed channel for feeding the fuel to the spraying means,
- a compressing means disposed in the feed channel so as to compress the fuel flowing towards the spraying means,
- a valve in the feed channel through which fuel is discharged towards the spraying means,
- the spraying means being a nozzle having a spray mouth, an internal feed path and an internal return path,
- a return channel connected to the spraying means so as to extend back to a junction where the return channel merges into the feed channel on an upstream side of the compressing means, such that a portion of the fuel once delivered to the spraying means through the feed channel flows back through the return channel into the junction,
- an intermittently operating valve disposed in the return channel so as to close and open the return channel intermittently or periodically to regulate a flow rate of the fuel, and
- a feed channel checking means disposed in the feed channel and on a downstream side of the compressing means, so that the fuel is normally prevented from flowing backwards by the checking means that is capable of opening to allow the fuel to flow forwardly towards the spraying means when a pressure at a predetermined level acts on the checking means,
- wherein the intermittently operating valve is an injector valve comprising a throttling valve body closing and opening the return channel to regulate the flow rate,
- the intermittently operating valve cooperating with the valve in the feed channel to control spraying of fuel into the combustion chamber at a desired rate.
Dependencies are inferred from the claim text.