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公开(公告)号：US5832403A
公开(公告)日：1998-11-03
申请号：US766615
申请日：1996-12-13
CPC分类号： G01F1/6965 , F02D41/187
摘要： A digital signal obtained by A/D converting an output of a thermal type air flow meter is supplied along two paths. After a time constant is obtained in one path, inverse-transformation is performed to obtain an error together with an output of the other path. The inverse-transformed signal is linearized on the basis of the characteristic of the thermal type air flow meter, and a direction of flow is determined.
摘要翻译： 通过A / D转换热式空气流量计的输出而获得的数字信号沿着两条路径供给。 在一个路径中获得时间常数之后，执行逆变换以便与其他路径的输出一起获得误差。 逆变换信号基于热式空气流量计的特性线性化，并且确定流动方向。
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公开(公告)号：US5952571A
公开(公告)日：1999-09-14
申请号：US934758
申请日：1997-09-22
摘要： In a thermal type flow meter having a temperature compensating bridge circuit, the temperature compensating bridge circuit includes a heating resistor, a temperature compensating resistor and a plurality of resistors each having a fixed resistance. The heating resistor and the temperature compensating resistor are supported by a support member in an air flow passage, and the support member is formed by a material having a small temperature coefficient .DELTA..lambda. of thermal conductivity between -0.06 and 0.06 w/m.multidot.k.sup.2. The absolute value of the output error of the flow meter is reduced as a result of variation of the flow quantity or flow velocity of intake air and the intake air temperature.
摘要翻译： 在具有温度补偿桥接电路的热式流量计中，温度补偿电路电路包括加热电阻器，温度补偿电阻器和各自具有固定电阻的多个电阻器。 加热电阻器和温度补偿电阻器由空气流动通道中的支撑构件支撑，并且支撑构件由具有-0.06和0.06w / m×k2之间的热导率的温度系数DELTAλ的材料形成。 流量计的输出误差的绝对值由于进气量或进气温度的流量或流速的变化而降低。
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公开(公告)号：US5750889A
公开(公告)日：1998-05-12
申请号：US605157
申请日：1996-02-13
CPC分类号： F02D41/187 , G01F1/6965 , G01F1/72
摘要： An air flow rate measuring apparatus for measuring an intake air amount of an internal combustion engine by use of a thermal air flow meter comprises means inputted with the output of the thermal air flow meter for correcting a response delay of the output and outputting the corrected output, and means inputted with the output of the correcting means for transforming it to a value corresponding to an air flow rate on the basis of the characteristic of the thermal air flow meter stored beforehand.
摘要翻译： PCT No.PCT / JP95 / 01178 Sec。 371日期1996年2月13日 102（e）日期1996年2月13日PCT提交1995年6月13日PCT公布。 WO95 / 34753 PCT出版物 日期1995年12月21日通过使用热空气流量计来测量内燃机的进气量的空气流量测量装置包括输入热空气流量计的输出的装置，用于校正输出的响应延迟 并输出校正后的输出，以及根据预先存储的热空气流量计的特性，输入校正装置的输出的装置，将其变换为对应于空气流量的值。
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公开(公告)号：US5789673A
公开(公告)日：1998-08-04
申请号：US452867
申请日：1995-05-30
CPC分类号： G01F5/00 , G01F1/6842
摘要： A thermal type air flow measuring instrument is mounted to a main passage forming an intake air passage of an internal combustion engine and is provided with an auxiliary passage which includes a heating resistor and a temperature sensing resistor therein and an electronic circuit which is electrically connected to the heating resistor and the temperature sensing resistor. The auxiliary passage is a passage including at least one bent portion composed of a first path substantially parallel to the main passage and a second path having a path different in flow direction from the first path. A member forming the auxiliary passage is fixed in a united form to only a case member for interiorly protecting the electronic circuit, and the case member is fixed to the outer wall surface of the intake air passage. The auxiliary passage structure capable of being handled as a single module united to the case member is effective to the mass production of an air flow control system and the reduction in cost thereof since the structure can be mounted to different kinds of internal combustion engines.
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5.发明授权
公开(公告)号：US5231871A
公开(公告)日：1993-08-03
申请号：US664297
申请日：1991-03-04
CPC分类号： G01F1/6842 , F02D41/187 , G01F1/72 , G01F5/00
摘要： An object of the present invention is to provide a hot-electrical-resistance type gas flow meter wherein a deterioration of a gas-cooled hot-electrical-resistance is prevented at the maximum flow rate, a decrease of sensitivity is prevented at the minimum flow rate and a wide dynamic range is achieve, and a structural feature of such gas flow meter is that the gas flow meter includes auxiliary path flow resistance changing means for changing a flow resistance of the auxiliary path so that the larger the flow rate of the flow is, the larger the flow resistance of the auxiliary path is.
摘要翻译： 本发明的目的是提供一种热电阻型气体流量计，其中，以最大流量防止气冷热电阻的劣化，在最小流动下防止灵敏度降低 速度和动态范围宽，这种气体流量计的结构特征是气体流量计包括用于改变辅助路径的流动阻力的辅助路径流动阻力改变装置，使得流量的流量越大 辅助路径的流阻越大。
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公开(公告)号：US5381691A
公开(公告)日：1995-01-17
申请号：US126759
申请日：1993-09-27
申请人： Atsushi Miyazaki , Chihiro Kobayashi , Shinya Igarashi , Tetsuo Matsukura , Haruhiko Maeda , Nobukatsu Arai , Yoshihito Sekine
发明人： Atsushi Miyazaki , Chihiro Kobayashi , Shinya Igarashi , Tetsuo Matsukura , Haruhiko Maeda , Nobukatsu Arai , Yoshihito Sekine
CPC分类号： G01F1/6842 , G01F5/00
摘要： An air flow meter comprises a main passage for an axial main air flow; an axial subpassage for air flow, disposed in the main passage and formed so that part of the air in the main passage is taken in at an upstream side thereof and flows in the same direction as the axial main air flow; a radial subpassage for air flow, intersecting the axial subpassage at a downstream side of the axial subpassage so that air from the axial subpassage flows into the radial subpassage and is divided into two radial air flows running in different radial directions; the air having passed through the radial subpassage joining the axial main air flow. An air flow sensing means is disposed in the radial subpassage for sensing a flow rate of air therein, and a projection is disposed in the radial subpassage around the intersection of the axial and radial subpassages, for suppressing turbulence of air flow around the intersection.
摘要翻译： 空气流量计包括用于轴向主空气流的主通道; 设置在主通道中并且形成为使主通道中的空气的一部分在其上游侧被吸入并沿与轴向主空气流相同的方向流动的用于空气流的轴向子通道; 用于空气流的径向子通道，在轴向子通道的下游侧与轴向子通道相交，使得来自轴向子通道的空气流入径向子通道并被分成在不同径向方向上运行的两个径向空气流; 已经通过径向子通道的空气连接轴向主空气流。 气流检测装置设置在径向子通道中，用于感测其中的空气流量，并且在轴向和径向子通道的交点处的径向子通道中设置突起，用于抑制交叉点周围的空气流的紊流。
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公开(公告)号：US06189379B1
公开(公告)日：2001-02-20
申请号：US09362190
申请日：1999-07-28
IPC分类号： G01F500
CPC分类号： G01F1/684 , G01F1/6842 , G01F5/00
摘要： A thermal type air flow measuring instrument is mounted to a main passage forming an intake air passage of an internal combustion engine and is provided. with an auxiliary passage which includes a heating resistor and a temperature sensing resistor therein and an electronic circuit which is electrically connected to the heating resistor and the temperature sensing resistor. The auxiliary passage is a passage including at least one bent portion composed of a first path substantially parallel to the main passage and a second path having a path different in flow direction from the first path. A member forming the auxiliary passage is fixed in a united form to only a case member for interiorly protecting the electronic circuit, and the case member is fixed to the outer wall surface of the intake air passage. The auxiliary passage structure capable of being handled as a single module united to the case member is effective to the mass production of an air flow control system and the reduction in cost thereof since the structure can be mounted to different kinds of internal combustion engines.
摘要翻译： 一种热式气流测量仪安装在形成内燃机进气通道的主通道上。 具有在其中包括加热电阻器和温度感测电阻器的辅助通道和电连接到加热电阻器和温度感测电阻器的电子电路。 辅助通道是包括由基本上平行于主通道的第一路径组成的至少一个弯曲部分和具有与第一路径不同的流动方向的路径的通道。 形成辅助通道的部件被联合地固定到仅用于内部保护电子电路的壳体部件，并且壳体部件固定到进气通道的外壁表面。 能够作为与壳体构件联合的单个模块来处理的辅助通道结构对于大量生产空气流量控制系统和降低成本是有效的，因为该结构可以安装到不同种类的内燃机上。
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公开(公告)号：US5939628A
公开(公告)日：1999-08-17
申请号：US112144
申请日：1998-07-09
CPC分类号： G01F1/684 , G01F1/6842 , G01F5/00
摘要： A thermal type air flow measuring instrument is mounted to a main passage forming an intake air passage of an internal combustion engine and is provided with an auxiliary passage which includes a heating resistor and a temperature sensing resistor therein and an electronic circuit which is electrically connected to the heating resistor and the temperature sensing resistor. The auxiliary passage is a passage including at least one bent portion composed of a first path substantially parallel to the main passage and a second path having a path different in flow direction from the first path. A member forming the auxiliary passage is fixed in a united form to only a case member for interiorly protecting the electronic circuit, and the case member is fixed to the outer wall surface of the intake air passage. The auxiliary passage structure capable of being handled as a single module united to the case member is effective to the mass production of an air flow control system and the reduction in cost thereof since the structure can be mounted to different kinds of internal combustion engines.
摘要翻译： 一种热式气流测量仪安装在形成内燃机进气通道的主通道上，并在其中设有一个辅助通道，该通道包括一个加热电阻器和一个温度感测电阻器，以及一个电连接到 加热电阻和温度检测电阻。 辅助通道是包括由基本上平行于主通道的第一路径组成的至少一个弯曲部分和具有与第一路径不同的流动方向的路径的通道。 形成辅助通道的部件被联合地固定到仅用于内部保护电子电路的壳体部件，并且壳体部件固定到进气通道的外壁表面。 能够作为与壳体构件联合的单个模块来处理的辅助通道结构对于大量生产空气流量控制系统和降低成本是有效的，因为该结构可以安装到不同种类的内燃机上。
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公开(公告)号：US5243859A
公开(公告)日：1993-09-14
申请号：US679316
申请日：1991-04-02
CPC分类号： G01F1/6842 , G01F5/00
摘要： An axial flow thermo-type air flow meter for internal combustion engines has a spider disposed in a main air passage formed in a body and having formed therein an auxiliary air flow passage including an axial auxiliary air flow passage portion accommodating a heat-generating resistor element for detecting a rate of engine intake air flow. The auxiliary air flow passage also includes more than one radial air flow passage portions which are connected to the axial air flow passage portion and curved and turned at their radially outer ends and then extend radially inwardly to outlet ends open to the main air passage, whereby the total length of the auxiliary air flow passage is increased to decrease the influence of pulsation of engine intake air flow on the air flow meter. Positioning of the outlet openings of the auxiliary air flow passage within a range of a radius from the axis of the main air flow passage, which radius is 1/2 of the radius of the main air flow passage, is effective to reduce fluctuation of the electric output of the air flow meter due to an unbalanced air flow velocity distribution occurring upstream of the air flow meter.
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10.发明授权Air flow meter for internal combustion engines and a manufacturing method thereof 失效用于内燃机的空气流量计及其制造方法
公开(公告)号：US5201216A
公开(公告)日：1993-04-13
申请号：US668066
申请日：1991-03-12
CPC分类号： G01F15/18 , G01F1/6842 , G01F5/00
摘要： A detecting module for an air flow meter for internal combustion engines has an arm provided with a heat wire sensor at one end thereof and with a signal processing unit at the other end, and is provided with a predetermined constant length. A body member assembled with the detecting module is selected from among several varieties of body members produced for engines with different stroke volumes, each of which has an main air path formed by an axial bore having a diameter commensurate with the stroke volume. A bridging member formed across the axial bore which forms the main air path is provided therein with a by-pass path for by-passing a part of the airflow within the main air path and a communicating hollow portion for accommodating the arm. The body member is further provided with a mount for fixing the detecting module, thereon, the height of which is different in each variety of the body members, so that the heat wire sensor is always placed in a predetermined metering area within the by-pass path, irrespective of the diameter of the axial bore forming the main air path, when the arm is accommodated in the hollow portion.
摘要翻译： 用于内燃机的空气流量计的检测模块具有在其一端设置有热线传感器的臂，在另一端具有信号处理单元，并且具有预定的恒定长度。 与检测模块组装的主体部件选自为具有不同冲程体积的发动机制造的几种不同的主体部件，每个主体部件具有由具有与冲程体积相当的直径的轴向孔形成的主空气路径。 在形成主空气路径的轴向孔中形成的桥接构件设置有用于使主空气路径内的一部分气流旁通的旁路路径和用于容纳臂的连通中空部。 主体部件还设置有用于固定其上的高度在每个身体构件中不同的检测模块的安装件，使得热线传感器总是被放置在旁路内的预定计量区域中 当臂被容纳在中空部分中时，不管构成主空气路径的轴向孔的直径如何。
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