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    • 24. 发明专利
    • Heating resistor type air flowmeter
    • 加热电阻式空气流量计
    • JP2003337056A
    • 2003-11-28
    • JP2002142495
    • 2002-05-17
    • Hitachi Car Eng Co LtdHitachi Ltd株式会社日立カーエンジニアリング株式会社日立製作所
    • MINAMITANI RINTAROIGARASHI SHINYAWATANABE IZUMIYASUKAWA AKIO
    • G01F1/68F02D35/00G01F1/698
    • PROBLEM TO BE SOLVED: To solve the problems that salt deposits and sticks to a heating resistor concentratedly, when rain or snow containing sea salt in a seaside region or thaw salt in a cold district is taken in, the deposition and sticking of the salt to the heating resistor becomes possible causes of deterioration of the measurement precision of an air flow measuring apparatus and corrosion of the heating resistor, and salt deposits and sticking to the heating resistor concentratedly also in the conventional adhesion preventing coating. SOLUTION: The temperature of the heating resistor is set to a temperature value or higher at which a water drop having touched its surface evaporates and disappears by film boiling. Besides, it does not matter if the temperature of the heating resistor is set to a temperature value or higher at which a liquid drop having touched its surface evaporates and disappears by film boiling, when a heating resistor type air flowmeter starts or stops its operation. Besides, a water-repellent and oil-repellent protective coating may be formed on the surface of the heating resistor. COPYRIGHT: (C)2004,JPO
    • 要解决的问题:为了解决盐分沉积和粘附在加热电阻器上的问题,当在海边地区的海水中含有海盐或含冰盐或在冷区的解冻盐时,沉积和粘附 对加热电阻器的盐成为空气流量测量装置的测量精度恶化和加热电阻器腐蚀的原因,并且在常规的防粘附涂层中也集中地沉积和粘附到加热电阻器上。 解决方案:加热电阻器的温度设定为接触其表面的水滴蒸发并通过薄膜沸腾消失的温度值或更高。 此外,当加热电阻型空气流量计开始或停止其操作时,加热电阻器的温度设定为接触其表面的液滴蒸发并通过薄膜沸腾消失的温度值或更高。 此外,可以在加热电阻器的表面上形成防水和防油涂层。 版权所有(C)2004,JPO
    • 26. 发明专利
    • Thermal air flowmeter
    • 热空气流量计
    • JP2007071889A
    • 2007-03-22
    • JP2006318878
    • 2006-11-27
    • Hitachi Car Eng Co LtdHitachi Ltd株式会社日立カーエンジニアリング株式会社日立製作所
    • HANZAWA KEIJIMATSUMOTO MASAHIROIGARASHI SHINYA
    • G01F1/698
    • PROBLEM TO BE SOLVED: To achieve increase in accuracy of a thermal air flowmeter by a method replacing laser trimming and in small circuitry. SOLUTION: An exothermic resistance element having a temperature dependency is arranged in an air flow channel, and air flow is measured based on the output value of a gauge circuit having the exothermic resistance element. An arithmetic circuit has map data related to an air flow-output characteristic, divides the region of the map data, alters the correction formula of the output characteristic every air flow region, and calculates the air flow. The region of the map data is divided so that low flow regions of the air flow are finer than high flow regions. COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:通过替代激光修整的方法和小电路来实现热空气流量计的精度的提高。 解决方案:具有温度依赖性的放热电阻元件布置在空气流动通道中,并且基于具有放热电阻元件的量规电路的输出值来测量空气流量。 算术电路具有与气流输出特性相关的地图数据,对地图数据的区域进行分割,改变每个气流区域的输出特性的校正公式,并计算空气流量。 划分地图数据的区域,使得空气流的低流动区域比高流动区域更细。 版权所有(C)2007,JPO&INPIT
    • 27. 发明专利
    • Air flow measuring module
    • 空气流量测量模块
    • JP2006119157A
    • 2006-05-11
    • JP2006019962
    • 2006-01-30
    • Hitachi Car Eng Co LtdHitachi Ltd株式会社日立カーエンジニアリング株式会社日立製作所
    • IGARASHI SHINYAKOBAYASHI CHIHIROHIRAYAMA HIROSHISAITO TAKAYUKIARAI NOBUKATSU
    • G01F1/684
    • PROBLEM TO BE SOLVED: To provide a heating resistor type air flow measuring device having superior installability and cost reduction, in an internal combustion engine. SOLUTION: This air flow measuring module has a structure, wherein a sub air passage is integrated to a part of the module and wherein the single module is made to have all the functions necessary for the heating resistor type air flow measuring device. Only one kind of module for the heating resistor type air flow measuring device is required for installation of the module to each engine, so that the cost, including system cost of the internal combustion engine, can be reduced. The module can be installed to an air cleaner or the like of an intake system to provide the superior mountability heating resistor type air flowmeter. COPYRIGHT: (C)2006,JPO&NCIPI
    • 要解决的问题:提供一种在内燃机中具有优异的安装性和成本降低的加热电阻器型气流测量装置。 解决方案:该气流测量模块具有这样的结构,其中副空气通道与模块的一部分集成在一起,并且其中单个模块具有加热电阻器型气流测量装置所需的全部功能。 为了将模块安装到每个发动机,仅需要一种用于加热电阻器型气流测量装置的模块,从而可以降低包括内燃机的系统成本的成本。 该模块可以安装到进气系统的空气滤清器等中,以提供优异的可安装性加热电阻器型空气流量计。 版权所有(C)2006,JPO&NCIPI
    • 29. 发明专利
    • Flow measuring instrument
    • 流量测量仪
    • JP2007298481A
    • 2007-11-15
    • JP2006128863
    • 2006-05-08
    • Hitachi Ltd株式会社日立製作所
    • OKAMOTO HIROKIIGARASHI SHINYAKOBAYASHI CHIHIROIDE KIYOTOMOMORINO TAKESHI
    • G01F1/684F02D35/00G01F1/00G01F1/68
    • G01F1/72G01F1/6842G01F5/00
    • PROBLEM TO BE SOLVED: To provide a thermal type flow measuring instrument capable of restraining an output from dropping to a minus side, although the output drops to the minus side in an abrupt change of a flow rate, in a conventional flow measuring instrument provided with a sub-air-passage having a thermal type flow measuring instrument by-pass passage and having a hole in this side of a flow measuring part. SOLUTION: A slit hole is opened in a downstream of a flow detecting element positioned in a downstream after passage bypass. The slit hole may be positioned between the flow detecting element and an outlet part, and may be favorably drilled between a wall face side and a recessed portion. The output is restrained from dropping to the minus side in leading-up, by this manner. COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:为了提供一种能够抑制输出下降到负侧的热式流量测量装置,尽管在传统的流量测量中,输出在流量的急剧变化中下降到负侧 设置有具有热式流量测量仪器旁通通道并且在流量测量部件的该侧面具有孔的副空气通道的仪器。 解决方案:在通过旁路位于下游的流量检测元件的下游,开口狭缝孔。 狭缝孔可以位于流量检测元件和出口部之间,并且可以有利地在壁面侧和凹部之间钻孔。 通过这种方式,输出被限制在前导中的负侧。 版权所有(C)2008,JPO&INPIT