| 摘要 |
The invention relates to a butterfly valve connection piece for an internal combustion engine, comprising a housing (1) and a throughflow opening (2) of said housing (1), in which a butterfly valve (7) is pivotably arranged around a pivotable axis extending in a perpendicular manner with respect to the longitudinal axis (9) of the throughflow opening (2), the butterfly valve is used to close the throughflow opening (2). When in a closed position, the butterfly valve (7) is inclined at a defined setting angle (10) in relation to the longitudinal axis (9) of the throughflow opening (2). The radial peripheral edge (8) thereof rests against the inner wall of the throughflow opening (2) and the throughflow opening (2) has a cylindrical shape at least in the region where the butterfly valve (7) comes to rest. The cylindrical region of rest in relation to the longitudinal axis (9) of the throughflow opening (2) forms a circular cylinder (17) which is cut on both sides at a certain angle, whereby the levels of the cut are inclined at a similar angle (10) in relation to the longitudinal axis (9) of the throughflow opening (2) and the butterfly valve (7) when arranged in a closed position.
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