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    • 2. 发明授权
    • Air-measuring device
    • 空气测量装置
    • US5167147A
    • 1992-12-01
    • US656079
    • 1991-03-01
    • Klaus-Juergen PetersWalter BoschHans-Peter StiefelKarl GmelinKurt FrankThomas Schwegel
    • Klaus-Juergen PetersWalter BoschHans-Peter StiefelKarl GmelinKurt FrankThomas Schwegel
    • G01F1/68F02D41/18G01F1/684G01F5/00
    • G01F1/6842F02D41/187G01F5/00
    • An air-measuring device for measuring the air mass taken in by an internal combustion engine which has a main flow channel, having a venturi section, and a temperature-dependent measuring resistor arranged in a bypass channel, the bypass channel opening upstream and downstream of the smallest flow cross-section of the venturi section in the direction of flow, in order to reduce the noise component in the measurement signal of the measuring resistor a channel region with an inlet and outlet opening is formed in the bypass channel, which channel region accommodates the measuring resistor in a central portion. The channel region is designed in such a way that the ratio of the flow cross-section of the central portion to the smallest cross-section of the venturi section is from 1:8 to 1:25 and the ratio of the cross-section to the cross-section of the inlet and outlet opening is in each case from 1:1 to 1:2.
    • PCT No.PCT / DE90 / 00439 Sec。 371 1991年3月1日 102(e)1991年3月1日PCT申请1990年6月8日PCT公布。 公开号WO91 / 00987 日本1991年1月24日。一种用于测量由内燃机吸入的空气质量的空气测量装置,所述内燃机具有主流道,具有文氏管部分和布置在旁通通道中的温度测量电阻器, 在文丘里管部分的流动方向的最小流动横截面的上游和下游旁通道旁通道,以便减小测量电阻器的测量信号中的噪声分量,其中形成具有入口和出口的通道区域 旁路通道,该通道区域在中央部分容纳测量电阻器。 通道区域的设计使得中心部分的流动横截面与文丘里管部分的最小横截面之比为1:8至1:25,横截面积与 入口和出口的横截面在每种情况下为1:1至1:2。