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    • 2. 发明授权
    • Cordierite honeycomb structure and process for producing the same
    • 堇青石蜂窝结构及其制造方法
    • US5849391A
    • 1998-12-15
    • US519285
    • 1995-08-25
    • Yasunao MiuraKojiro TokudaMamoru Nisimura
    • Yasunao MiuraKojiro TokudaMamoru Nisimura
    • C04B35/195C04B38/00B32B3/12
    • C04B35/195C04B38/0006Y10T428/24149
    • A cordierite honeycomb structure having a coefficient of thermal conductivity of not less than 0.035 J/cm.multidot..degree.K..multidot.sec, a porosity of not more than 16%, and a coefficient of thermal expansion of not more than 1.0.times.10.sup.-6 /.degree.C. at 40.degree. to 800.degree. C. A process for producing a cordierite honeycomb structures, involves at least the steps of: mixing powders of kaolin, talc, and other starting materials for cordierite together so as to provide a chemical composition of cordierite; and extruding the mixture; and firing the extrudate, wherein the kaolin has an average particle diameter of not more than 5 .mu.m and such a particle size distribution that the proportion of particles with diameters of less than 1 .mu.m is 10% by weight and the talc has an average particle diameter of not more than 10 .mu.m and such a particle size distribution that the proportion of particles with diameters of less than 1 .mu.m is not more than 5%.
    • 导热系数为0.035J / cm×K·K.xsec,孔隙率为16%以下,热膨胀系数为1.0×10 -6 /℃以下的堇青石蜂窝结构体。 一种生产堇青石蜂窝结构体的方法至少包括以下步骤:将堇青石的高岭土,滑石和其它起始材料的粉末混合在一起,以提供堇青石的化学组成; 并挤出混合物; 并煅烧所述挤出物,其中所述高岭土的平均粒径不大于5μm,并且具有直径小于1μm的颗粒的比例为10重量%的粒度分布,并且所述滑石具有平均粒径 粒径不大于10μm,并且具有直径小于1μm的颗粒的比例不大于5%的粒度分布。
    • 3. 发明授权
    • Heat-wire type air flow measurement apparatus
    • 热丝式气流测量装置
    • US4669306A
    • 1987-06-02
    • US743492
    • 1985-06-11
    • Susumu AkiyamaKatsunori ItoToshitaka YamadaTiaki MizunoMasumi Kinugawa
    • Susumu AkiyamaKatsunori ItoToshitaka YamadaTiaki MizunoMasumi Kinugawa
    • G01F1/68G01F1/698G01F15/12
    • G01F1/6986G01F1/6983
    • A heat generating element having a thermal characteristic such that its resistance varies in response to changes in temperature is provided in the intake pipe of an engine. A heating power, the voltage of which is set by a reference voltage source, is supplied to the heat generating element via a transistor. The supply of this heating power is controlled by a start pulse signal periodically generated by a set flip-flop circuit when the ignition switch is on. When the heat generating element reaches a predetermined temperature, the supply is cut off by the flip-flop circuit. A measurement signal having a pulse width corresponding to the time period of heating power supply is generated from the flip-flop circuit. The opening of the ignition switch is detected and a one-shot multivibrator is driven to produce a burn-off signal having a pulse width to which the burn-off period corresponds. This burn-off control signal turns the transistor on and heating power is supplied to the heat generating element and the voltage of the reference power source is reduced so that the voltage of the heating power is switched to a low level.
    • 在发动机的进气管中设置具有热特性使得其电阻随温度变化而变化的发热元件。 其电压由参考电压源设定的加热功率通过晶体管提供给发热元件。 当点火开关接通时,通过由设置的触发器电路周期性地产生的起动脉冲信号来控制该加热功率的供应。 当发热元件达到预定温度时,电源被触发器电路切断。 从触发电路产生具有与加热电源的时间段对应的脉冲宽度的测量信号。 检测点火开关的打开,并且驱动单稳态多谐振荡器以产生具有燃烧时间对应的脉冲宽度的燃烧断开信号。 该熄火控制信号使晶体管接通,向发热元件供给加热电力,降低基准电源的电压,使加热电力的电压切换为低电平。