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    • 6. 发明公开
    • SOOT SENSOR SYSTEM
    • RUSSSENSORSYSTEM
    • EP3069119A1
    • 2016-09-21
    • EP14861263.3
    • 2014-11-12
    • Stoneridge, Inc.
    • HEDAYAT, KayvanHART, JohnMATSON, EricWILSON, MarkPOIRIER, Norman
    • G01N7/06
    • G01N15/0656G01M15/102G01N15/0606G01N2015/0046
    • A soot sensing system includes a soot sensor having a first element, and circuitry to an amount of soot accumulated on the element and to control heating of the element in response to the soot accumulation. An electrostatic repelling voltage (ERV) may be applied to a sensor/heater element(s) during a contamination prevention mode (CPM) to repel ash and reduce contamination of the sensor. A pulsed heating voltage (PHV) may be applied to the elements during the CPM and a pulsed ERV may be applied to the elements during the “off” period of the PHV. All voltage to the elements may be turned off during the CPM and the elements may be floating/ground. A PHV may be applied to the elements during the CPM and no voltage may be applied to the elements during the “off” period of the PHV. A heating voltage may be applied to the elements during a CPM corresponding to a cold start.
    • 煤烟感测系统包括具有第一元件的烟灰传感器,以及积累在元件上的一定量的烟灰的电路,并且响应于烟灰积聚来控制元件的加热。 在污染防止模式(CPM)期间,可以将静电排斥电压(ERV)施加到传感器/加热器元件以排斥灰尘并减少传感器的污染。 可以在CPM期间将脉冲加热电压(PHV)施加到元件,并且可以在PHV的“关闭”期间将脉冲ERV施加到元件。 在CPM期间可能关闭元件的所有电压,并且元件可能是浮置/接地的。 在CPM期间可以将PHV施加到元件,并且在PHV的“关闭”期间不会对元件施加电压。 在对应于冷启动的CPM期间,可以向元件施加加热电压。