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    • 3. 发明公开
    • VAKUUMERZEUGERVORRICHTUNG UND VERFAHREN ZU IHREM BETREIBEN
    • VAKUUMERZUUGERVORRICHTUNG UND VERFAHREN ZU IHREM BETREIBEN
    • EP2191147A1
    • 2010-06-02
    • EP08856468.7
    • 2008-11-27
    • FESTO AG & Co. KG
    • MEDOW, RalfBRETZLER, MarkusKREHL, Yvonne
    • F04F5/52
    • F04F5/52B25J15/0625
    • The invention relates to a vacuum generating device (1) and to a method suitable for the operation thereof. An ejector unit (27) is connected with an inlet (29) thereof to an air supply channel (32) that can be selectively closed or opened by an electronic control unit (14) in order to selectively turn off or turn on the ejector unit (27). When the ejector device (27) is turned on, a negative pressure is generated in a suction channel (35). The ejector unit (27) is operated such that the negative pressure fluctuates between an upper switching value and a lower switching value. By comparison to a reference value, the operating period of the ejector unit (27) is determined in order to generate a diagnosis signal that allows a conclusion of the leak that is present.
    • 本发明涉及一种真空发生装置(1)以及适于其操作的方法。 喷射器单元(27)的入口(29)与空气供应通道(32)连接,空气供应通道(32)可以通过电子控制单元(14)选择性地关闭或打开,以选择性地关闭或打开喷射器单元 (27)。 当喷射器装置(27)接通时,在抽吸通道(35)中产生负压。 喷射器单元(27)被操作为使得负压在高开关值和低开关值之间波动。 通过与参考值比较,确定喷射器单元(27)的操作周期,以便生成允许存在的泄漏的结论的诊断信号。