Fuel volatility sensor and method based on capacitance measurement
    1.
    发明公开
    Fuel volatility sensor and method based on capacitance measurement 审中-公开
    Kraftstoffflüchtigkeitssensorand Methode auf einer Kapazitanzerfassung basiert

    公开(公告)号:EP1284352A3

    公开(公告)日:2006-02-08

    申请号:EP02078017.7

    申请日:2002-07-24

    Abstract: A method and apparatus for determining a volatility of a fuel sample. A fuel sample is collected in a container (22) and heated for a time period using a heater device (24). Periodically during the heating, the capacitance of the fuel sample and the temperature of the heater device (24) are determined. After a time period passes, the volatility of the fuel sample is determined using the capacitance decrease and the temperature increase. Specifically, a voltage across the heater device (24) is used, along with the current through the heater device (24) to determine the resistance of the heater device (24), which gives the temperature of the heater device (24) and the sample. The capacitance and temperature are compared to values derived from experimentation for fuels of varying DI. The first measurement of capacitance with a known sample volume can be used to determine the MTBE or ethanol content in gasoline fuels.

    Abstract translation: 一种用于确定燃料样品的挥发性的方法和装置。 将燃料样品收集在容器(22)中,并使用加热器装置(24)加热一段时间。 在加热期间,确定燃料样品的电容和加热器装置(24)的温度。 经过一段时间后,使用电容减小和温度升高确定燃料样品的挥发性。 具体地,使用加热器装置(24)两端的电压以及通过加热器装置(24)的电流来确定加热器装置(24)的电阻,其给出加热器装置(24)的温度和 样品。 将电容和温度与变化DI燃料的实验得出的值进行比较。 用已知样品体积的电容的第一次测量可以用于确定汽油燃料中的MTBE或乙醇含量。

    Method and apparatus for determining an approximation for fuel volatility on-board a vehicle
    3.
    发明公开
    Method and apparatus for determining an approximation for fuel volatility on-board a vehicle 审中-公开
    对于上板的车辆确定燃料挥发性的近似值的方法和装置

    公开(公告)号:EP1363004A3

    公开(公告)日:2006-08-30

    申请号:EP03076291.8

    申请日:2003-04-29

    Abstract: An apparatus and method for determining an approximation to a measure of the volatility of fuel on-board a vehicle having an internal combustion engine. The method includes the steps of measuring at least one characteristic of the fuel (14) corresponding to a temperature of the fuel, a volume of the fuel, and a concentration of oxygenates within the fuel; determining an approximation of the a measure of the volatility of the sample volume of fuel (18, 20, 22, 24, 26, 28, 30) using a linear function based on the at least one measured characteristic of the fuel corresponding to temperature, volume, and concentration of oxygenates of the fuel. Preferably, at least one temperature measurement is associated with a predetermined volume of the sample as the sample is evaluated. The method can include determining whether a fuel contains ethanol (18), and if not, whether the fuel is a winter blend of fuel (26) or a summer blend of fuel (30). The method to determine whether ethanol is present can include the steps of bringing the fuel into contact with a sensing element (18A); measuring a characteristic of the fuel corresponding to concentration of oxygenates (18B), such as the change in capacitance or resistance of the sensing element; and calculating the dielectric constant or the conductivity of the sample respectively (18C). The method to determine the type of non-ethanol containing fuel can be based on two temperature measurements taken at two predetermined volumes during the evaporation process (16, 18, 22, 24, 26, 28).

    Method and apparatus for determining an approximation for fuel volatility on-board a vehicle
    4.
    发明公开
    Method and apparatus for determining an approximation for fuel volatility on-board a vehicle 审中-公开
    对于上板的车辆确定燃料挥发性的近似值的方法和装置

    公开(公告)号:EP1363004A2

    公开(公告)日:2003-11-19

    申请号:EP03076291.8

    申请日:2003-04-29

    Abstract: An apparatus and method for determining an approximation to a measure of the volatility of fuel on-board a vehicle having an internal combustion engine. The method includes the steps of measuring at least one characteristic of the fuel (14) corresponding to a temperature of the fuel, a volume of the fuel, and a concentration of oxygenates within the fuel; determining an approximation of the a measure of the volatility of the sample volume of fuel (18, 20, 22, 24, 26, 28, 30) using a linear function based on the at least one measured characteristic of the fuel corresponding to temperature, volume, and concentration of oxygenates of the fuel. Preferably, at least one temperature measurement is associated with a predetermined volume of the sample as the sample is evaluated. The method can include determining whether a fuel contains ethanol (18), and if not, whether the fuel is a winter blend of fuel (26) or a summer blend of fuel (30). The method to determine whether ethanol is present can include the steps of bringing the fuel into contact with a sensing element (18A); measuring a characteristic of the fuel corresponding to concentration of oxygenates (18B), such as the change in capacitance or resistance of the sensing element; and calculating the dielectric constant or the conductivity of the sample respectively (18C). The method to determine the type of non-ethanol containing fuel can be based on two temperature measurements taken at two predetermined volumes during the evaporation process (16, 18, 22, 24, 26, 28).

    Abstract translation: 用于近似的确定性开采船上具有内燃发动机的车辆的燃料的挥发性的度量的装置和方法。 该方法包括测量对应于所述燃料的温度,燃料的体积,并且在燃料中的含氧化合物的浓度的燃料(14)的至少一个特征的步骤; 确定使用基于对应于温度的燃料的至少一个测得的特征的线性函数的燃料的样品体积(18,20,22,24,26,28,30)的挥发性的度量的近似, 体积,并且燃料的含氧化合物的浓度。 优选地,当样品被评估的至少一个温度测量与样品的预定体积有关。 该方法可包括确定是否采燃料含有乙醇(18),并且如果不是,无论燃料是冬季燃料(26)或燃料的夏季混合(30)的共混物。 该方法确定性地矿无论乙醇存在可包括使燃料接触到感测元件(18A)的工序; 测量燃料对应于含氧化合物(18B)的浓度的特性:如电容或感测元件的电阻变化; 并计算介电常数或样品的分别的传导性(18C)。 该方法确定性地挖掘非乙醇燃料含可基于在蒸发过程(16,18,22,24,26,28)在两个预定体积采取了两个温度测量的类型。

    Fuel volatility sensor and method based on capacitance measurement
    5.
    发明公开
    Fuel volatility sensor and method based on capacitance measurement 审中-公开
    基于电容测量的燃料挥发性传感器和方法

    公开(公告)号:EP1284352A2

    公开(公告)日:2003-02-19

    申请号:EP02078017.7

    申请日:2002-07-24

    Abstract: A method and apparatus for determining a volatility of a fuel sample. A fuel sample is collected in a container (22) and heated for a time period using a heater device (24). Periodically during the heating, the capacitance of the fuel sample and the temperature of the heater device (24) are determined. After a time period passes, the volatility of the fuel sample is determined using the capacitance decrease and the temperature increase. Specifically, a voltage across the heater device (24) is used, along with the current through the heater device (24) to determine the resistance of the heater device (24), which gives the temperature of the heater device (24) and the sample. The capacitance and temperature are compared to values derived from experimentation for fuels of varying DI. The first measurement of capacitance with a known sample volume can be used to determine the MTBE or ethanol content in gasoline fuels.

    Abstract translation: 一种用于确定燃料样品的挥发性的方法和设备。 将燃料样品收集在容器(22)中并使用加热器装置(24)加热一段时间。 在加热期间定期地确定燃料样品的电容和加热器装置(24)的温度。 经过一段时间后,燃料样品的挥发性使用电容减少和温度升高来确定。 具体地,使用加热器装置(24)两端的电压以及通过加热器装置(24)的电流来确定加热器装置(24)的电阻,其给出加热器装置(24)的温度和 样品。 将电容和温度与从不同DI的燃料实验得到的值进行比较。 具有已知样品体积的第一次电容测量可用于确定汽油燃料中的MTBE或乙醇含量。

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