| 摘要 |
A flow rate meter is proposed which serves to ascertain the quantity of a flowing medium, in particular the quantity of air aspirated via an air intake tube by an internal combustion engine. The flow rate meter includes a measuring body which is pivotable counter to a restoring force about a bearing shaft supported in the housing in accordance with the quantity of the medium flowing therethrough. The flow rate meter further includes a damping body which is likewise pivotable about the bearing shaft and defines a damping chamber in the form of a movable wall, with respect to the flow conduit. The measuring body and the damping body are coupled rigidly to one another by means of crosspieces. The invention comprehends embodiments wherein either the damping body or the measuring body is directly connected with a hub held in a rotationally fixed manner on the bearing shaft. The housing wall about the hub is provided such that a leakage gap formed between the housing wall and the hub terminates at one end outside the damping chamber downstream of the measuring body. As a result, the harmful effects on the measuring competence of the flow rate meter which would be caused by air flowing via the leakage gap are avoided; thus, even very small flowing air quantities such as occur at low engine rpm levels can still be measured accurately.
|
