| 摘要 |
The invention relates to apparatus for providing a fluid flow, comprising means in the form of a plate (11) defining a main fluid flow passage (13) and an additional fluid flow passage (31), for admitting air where the main passage is a passage for vapourising fluid fuel, a needle valve (38) to control flow in the passage (31) and a separate device (14) which defines a venturi via portion (26, 27) of a through bore, the device being locatable in the main fluid flow passage (13) and having a plurality of through spaced apart bores extending into the venturi, which effectively comprises the main fluid flow passage when the device (14) is in the plate (11). The same plate (11) may be used with different devices (14) to cater for different flow characteristics required. |
