| 摘要 |
Downdraught carburettor (1) with a narrowed section (22) and throttle valve (3), lying downstream of this, in relation to which downstream first bores (50, 50', 50'') in the wall (24) of the air duct (2) are distributed on the circumference and are connected to further bores (70, 70', 70'') on the circumference of the narrowed section (22). The first bores (50) and further bores (70) are respectively connected to one another by annular ducts (40, 60), which are incorporated in a flange (44) or narrowing insert (61). <IMAGE>
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