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1.发明公开Hot-wire type air-flow meter for internal combustion engines 失效Hitzdraht-LuftmengenmesserfürBrennkraftmaschinen
公开(公告)号：EP1221592A3
公开(公告)日：2006-03-29
申请号：EP01112908.7
申请日：1988-06-15
申请人： Hitachi, Ltd.
发明人： Arai, Nobukatsu , Sekine, Yoshihito , Osawa, Tadao , Tokuda, Hiroatsu , Usui, Toshifumi , Tsutsui, Mitsukuni
CPC分类号： F02D41/187 , G01F1/6842 , G01F5/00
摘要： The invention relates to a hot-wire type air flow meter comprising a block (230) in which an auxiliary flow path (242) is formed and a circuit unit (2) is coupled to the block (230), wherein the block (230) is inserted removably through a wall of a body (240) forming a primary flow path (241) and constituting an intake air passage of an internal combustion engine, wherein the whole auxiliary flow path (242) can be mounted to and released from the body (240) with the block (230) and wherein the auxiliary flow path (242) having an inlet portion opening to the upstream side of the primary flow path (241) and having a curved and folded auxiliary flow path (242) in order to obtain a length of the auxiliary flow path (242) being larger than the axial length of the block (230).
摘要翻译： 发动机进气口中的装置的主体（1）形成基本上圆柱形的底座。 流动路径（3），一体形成的突起（2）在喇叭口（4a）处打开，以提供通过热丝元件（10）的辅助流路（4）和温度。 补偿器（12）。 这些部件（10,12）安装在辅助流动路径（4）的轴向部分中，然后该辅助流动路径弯曲成具有出口（5a）进入主流的径向部分（5）。 弯曲具有保护使用/优点的减压效果：Esp。 使用汽车发动机，紧凑型流量计足够精确，可控制空燃比，但没有湍流噪音和脉动不稳定，热丝元件不易受到发动机回吹的损害。
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公开(公告)号：EP0588626B2
公开(公告)日：2003-08-13
申请号：EP93307289.4
申请日：1993-09-16
CPC分类号： G01F5/00 , G01F1/6842
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公开(公告)号：EP0660090A3
公开(公告)日：1996-06-26
申请号：EP95100012.4
申请日：1988-06-15
申请人： HITACHI, LTD.
发明人： Arai, Nobukatsu , Sekine, Yoshihito , Osawa, Tadao , Tokuda, Hiroatsu , Usui, Toshifumi , Tsutsui, Mitsukuni
CPC分类号： F02D41/187 , G01F1/6842 , G01F5/00
摘要： The invention relates to a hot-wire type air-flow meter, which comprises a primary flow path (3) which is formed in a body (1), an auxiliary flow path (4, 5) which is formed in a projecting portion (2) provided inside the primary flow path (3) and consists of an axially extending inlet portion (4) opening to the upstream side, and an outlet portion (5) perpendicular to the inlet portion (4) and being provided with an outlet opening (5a, 5b) located downstream of the inlet opening (4a) of the inlet portion (4) wherein the outlet portion (5) comprises an axial portion, and a flow sensor (10, 12) provided in the inlet portion (4). The invention further relates to an air-flow meter with an axial auxiliary flow path wherein a check valve is provided for backfiring protection.
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4.发明公开Hot-wire type air flow meter. 无效Luftdurchflussenenemesser vom Hitzdrahttyp und damit versehene Brennkraftmaschine。
公开(公告)号：EP0295647A1
公开(公告)日：1988-12-21
申请号：EP88109534.3
申请日：1988-06-15
申请人： HITACHI, LTD.
发明人： Arai, Nobukatsu , Sekine, Yoshihito , Osawa, Tadao , Tokuda, Hiroatsu , Usui, Toshifumi , Tsutsui, Mitsukuni
CPC分类号： F02D41/187 , G01F1/6842 , G01F5/00
摘要： A compact hot-wire type air flow meter for an internal combustion engine with a high measuring accuracy is provided with a primary flow path(3)forming an intake air passage and an auxiliary flow path(4)incorporating therein a hot-wire element(10)for measuring the intake air. The auxiliary flow path(4)is defined by a flowpath(4a)in an axial direction of the primary flow path(3)and a flow path(5)in a radial direction of the primary flow path(3).
摘要翻译： 具有高测量精度的用于内燃机的紧凑型热线式空气流量计设置有形成进气通道的主流路（3）和内置有热丝元件（4）的辅助流路（4） 10）用于测量进气。 辅助流路（4）由主流路（3）的轴向的流路（4a）和主流路（3）的径向的流路（5）构成。
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公开(公告)号：EP0606983A3
公开(公告)日：1995-08-30
申请号：EP94300085.1
申请日：1994-01-06
CPC分类号： G01F1/6965 , F02D41/02 , F02D41/187 , F02D2041/283 , G01F1/684 , G01F1/698
摘要： A flow rate of air flowing through an air inlet pipe is detected by a heating resistor disposed therein and converted into an electric signal. A digital processing unit carries out calculation to judge whether or not the converted signal coincides with a predetermined temperature value and to correct the converted signal so that the same is caused to coincide with the predetermined value if both the values do not coincide with each other. The corrected signal is used to keep the heating resistor at the predetermined temperature. The digital processing unit is integrated with the air inlet pipe independently of a digital processing unit for engine control.
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公开(公告)号：EP0561365A3
公开(公告)日：1995-05-10
申请号：EP93104304.6
申请日：1993-03-16
申请人： HITACHI, LTD.
CPC分类号： G01F1/698 , G01F1/684 , G01F1/6845 , G01F5/00
摘要： An exothermic resistor type air flow detector (1) which is compact and requires no special radiation structure. A control circuit comprised of a transistor (T) and a differential amplifier are formed with an exothermal resistor (Rh) on an insulated substrate (2), which is placed in an air passage (10) in which air current (Q) is to be measured.
摘要翻译： 一种发热电阻式空气流量检测器（1），它结构紧凑，不需要特殊的辐射结构。 由绝缘衬底（2）上的放热电阻（Rh）形成由晶体管（T）和差分放大器组成的控制电路，该绝缘衬底（2）放置在空气通道（10）中，空气流（Q） 被测量。
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公开(公告)号：EP0606983A2
公开(公告)日：1994-07-20
申请号：EP94300085.1
申请日：1994-01-06
CPC分类号： G01F1/6965 , F02D41/02 , F02D41/187 , F02D2041/283 , G01F1/684 , G01F1/698
摘要： A flow rate of air flowing through an air inlet pipe is detected by a heating resistor disposed therein and converted into an electric signal. A digital processing unit carries out calculation to judge whether or not the converted signal coincides with a predetermined temperature value and to correct the converted signal so that the same is caused to coincide with the predetermined value if both the values do not coincide with each other. The corrected signal is used to keep the heating resistor at the predetermined temperature. The digital processing unit is integrated with the air inlet pipe independently of a digital processing unit for engine control.
摘要翻译： 通过进气管流动的空气的流量由设置在其中的加热电阻器检测并转换成电信号。 数字处理单元执行计算，以判断转换的信号是否与预定温度值一致，并且如果两个值彼此不一致，则校正转换后的信号使得与预定值一致。 校正的信号用于将加热电阻器保持在预定温度。 数字处理单元独立于用于发动机控制的数字处理单元与进气管集成。
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公开(公告)号：EP0172440B1
公开(公告)日：1990-10-03
申请号：EP85109338.5
申请日：1985-07-25
申请人： HITACHI, LTD.
CPC分类号： G01F1/698
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公开(公告)号：EP0172440A2
公开(公告)日：1986-02-26
申请号：EP85109338.5
申请日：1985-07-25
申请人： HITACHI, LTD.
CPC分类号： G01F1/698
摘要： A hot-wire flow rate measuring apparatus includes a first thermo-sensitive resistive lement (3) disposed in the flow path of fluid under measurement, resistor unit (12; 26; 60; 70, 72) connected in series to the first sensing element, a second thermo-sensitive resistive element (6) for temperature compensation disposed in the flow path of the fluid, a control circuit (34) adapted to supply a current to the serial connection of the first sensing element and the resistor unit in response to the difference between the voltage produced by the first sensing element and the voltage produced by the second sensing element, and an output circuit (14) for producing a voltage representative of the fluid flow rate in response to the terminal voltage (V 2 ) of the resistor. The apparatus is further provided with a current circuit (20) which controls the output characteristics of the output circuit by supplying a compensation current (I 20 ) proportionate to the terminal voltage of the resistor (12) to a portion of the serial connection.
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公开(公告)号：EP0561365B1
公开(公告)日：2002-10-23
申请号：EP93104304.6
申请日：1993-03-16
申请人： Hitachi, Ltd.
CPC分类号： G01F1/698 , G01F1/684 , G01F1/6845 , G01F5/00
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