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    • 45. 发明授权
    • Measuring element for a mass air flow sensor and mass air flow sensor
using the measuring element
    • 使用测量元件的质量空气流量传感器和质量空气流量传感器的测量元件
    • US5708205A
    • 1998-01-13
    • US649177
    • 1996-05-17
    • Masamichi YamadaKaoru UchiyamaIzumi WatanabeTadashi IsonoToshihiko Nakau
    • Masamichi YamadaKaoru UchiyamaIzumi WatanabeTadashi IsonoToshihiko Nakau
    • G01P5/12F02D35/00G01F1/68G01F1/692G01F1/698H01C13/00
    • G01F1/698G01F1/692H01C13/00
    • A measuring element for a mass air flow sensor formed on a substrate for measuring a flow rate of an objective fluid comprises a pair of heated resistors of thin films juxtaposed in the flowing direction of the objective fluid, formed at a thin film heated resistor forming part on the substrate, a pair of non-heated ambient temperature sensing resistors of thin films, formed at a thin film ambient temperature sensing resistor forming part on the substrate, and a plurality of electrode terminals of thin films formed at a supporting part at which the substrate is supported, being a part excluding the heated resistor thin film forming part and the thin film ambient temperature sensing resistor forming part, for taking out electrical signals from the heated resisters and the non-heated ambient temperature sensing resistors, wherein the thin film heated resistor forming part and the thin film ambient temperature sensing resistor forming part are shifted each other and arranged before and after in the flowing direction of the fluid, and shifted and arranged left and right in the direction perpendicular to the flowing direction so that the pair of the heated resistors and the pair of the non-heated do not superimpose each other in the viewing direction parallel to the flowing direction, and the supporting part is allocated at one end side of the substrate, at which the plurality of electrode terminals of thin films are formed.
    • 形成在用于测量物流的流量的基板上的质量空气流量传感器的测量元件包括一对加热的薄膜电阻,该薄膜并列在物流的流动方向上,形成在薄膜加热的电阻器形成部分 在衬底上,形成在薄膜环境温度感测电阻器上形成在衬底上的一部分薄膜的一对非加热环境温度感测电阻器,以及形成在支撑部分处的多个薄膜电极端子, 基板被支撑,除了加热的电阻器薄膜形成部分和薄膜环境温度感测电阻器形成部分之外的部分,用于从加热的电阻器和非加热的环境温度感测电阻器中取出电信号,其中薄膜被加热 电阻器形成部分和薄膜环境温度感测电阻器形成部分彼此相互偏移并且在之前和之后布置 并且沿垂直于流动方向的方向左右移动并布置,使得一对加热电阻器和一对未加热的电阻器在观察方向上不彼此叠置平行 并且支撑部分被分配在形成有多个薄膜电极端子的基板的一端侧。
    • 46. 发明授权
    • Thermal-type air flow measuring instrument with fluid-direction judging
capability
    • 具有流体方向判断能力的热式气流测量仪
    • US5696321A
    • 1997-12-09
    • US544648
    • 1995-10-18
    • Shinya IgarashiChihiro KobayashiYasunori MouriHitoshi IshikawaKaoru Uchiyama
    • Shinya IgarashiChihiro KobayashiYasunori MouriHitoshi IshikawaKaoru Uchiyama
    • G01F1/68F02D35/00G01F1/684G01F1/69G01F5/00G01M15/00
    • G01F5/00G01F1/684G01F1/6842
    • There is disclosed a thermal-type air flow measuring instrument which judges whether the direction of flow of a fluid, ranging from a static flow to a pulsating flow involving a reverse flow, is forward or reverse, and outputs a signal corresponding to the flow rate of the fluid, thereby measuring the flow rate with high precision. An auxiliary passage is provided in a fluid passage, and is constituted by first, second and third passageways. Two temperature sensing resistors are mounted respectively at an upstream side and a downstream side within the first passageway in close proximity to each other. Most of the fluid, flowed into the first passageway in a forward direction, flows through the second passageway. The third passageway serves to direct a reverse flow of the fluid toward the temperature sensing resistors. Results of measurement of the flow rate of intake air in an internal combustion engine indicate that a minus error due to a pulsating flow, experienced in the conventional construction, is eliminated almost completely, and that a plus error due to a reverse flow is reduced to about 1/10.
    • 公开了一种热式空气流量测量装置,其判断从静止流到涉及逆流的脉动流的流体的流动方向是向前还是反向,并输出与流量对应的信号 的流体,从而以高精度测量流量。 辅助通道设置在流体通道中,并且由第一,第二和第三通道构成。 两个温度感测电阻分别安装在彼此靠近的第一通道内的上游侧和下游侧。 大多数流体沿向前的方向流入第一通道,流过第二通道。 第三通道用于将流体的反向流动引向温度感测电阻器。 内燃机中的进气流量的测定结果表明,传统结构中经历的脉动流量产生的负误差几乎完全消除,由于反向流动引起的正误差减小到 约+ E,fra 1/10 + EE。