公开(公告)号：US06561021B2

公开(公告)日：2003-05-13

申请号：US09839534

申请日：2001-04-23

申请人： Hiroyuki Uramachi ,  Fumiyoshi Yonezawa ,  Naruki Suetake ,  Ryuji Tohyama ,  Tomoya Yamakawa ,  Shingo Hamada ,  Takeharu Oshima

发明人： Hiroyuki Uramachi ,  Fumiyoshi Yonezawa ,  Naruki Suetake ,  Ryuji Tohyama ,  Tomoya Yamakawa ,  Shingo Hamada ,  Takeharu Oshima

IPC分类号： G01F500

CPC分类号： G01F1/6842

摘要： A flow rate-measuring device capable of measuring accurately a flow rate of fluid to be measured containing a drift or eddy as compared with a conventional device is provided. A flow rate-measuring passage 11 for measuring a flow rate of the fluid to be measured is constructed so that its opening area in an upstream region communicating to an inlet 111 gradually decreases from upstream to downstream. A flow rate-detecting element 31 is disposed near an outlet in the flow rate-measuring passage 11. The device is provided with a leak flow passage 18 allowing a part of the fluid which has flown in from the inlet 111 of the flow rate-measuring passage 11 to leak out of the flow rate-measuring passage 11 at a portion upstream from an outlet 112 of the flow rate-measuring passage 11, in particular upstream from a position where the flow rate-detecting element 31 is disposed.

公开(公告)号：US06234015B1

公开(公告)日：2001-05-22

申请号：US09285037

申请日：1999-04-01

申请人： Shingo Hamada ,  Tomoya Yamakawa ,  Fumiyoshi Yonezawa ,  Hiroyuki Uramachi ,  Takeharu Oshima ,  Satoru Kotoh

发明人： Shingo Hamada ,  Tomoya Yamakawa ,  Fumiyoshi Yonezawa ,  Hiroyuki Uramachi ,  Takeharu Oshima ,  Satoru Kotoh

IPC分类号： G01F168

CPC分类号： G01F1/69 ,  G01F1/684 ,  G01F1/72 ,  G01F5/00

摘要： A flow rate measuring device includes a flow rate measuring duct for placement in a primary passage for a fluid, extending substantially parallel to the primary passage, and a flow rate detector in the flow rate measuring duct for measuring a flow rate of the fluid in the primary passage, the flow rate measuring duct having a downstream wall including a notch or a through hole. The downstream wall may include an air-permeable member. The flow rate measuring device may include a projection on an outer wall of the flow rate measuring duct upstream of the notch, through hole, or air-permeable member, the projection extending in a circumferential direction with respect to the flow rate measuring duct.

摘要翻译： 流量测量装置包括用于放置在基本平行于主通道的流体的主通道中的流量测量管道和流量测量管道中的流量检测器，用于测量流体的流速 初级通道，流量测量管道具有包括缺口或通孔的下游壁。 下游壁可以包括透气构件。 流量测量装置可以包括在凹口，通孔或透气构件的上游的流量测量管道的外壁上的突起，该突起在相对于流量测量导管的圆周方向上延伸。

公开(公告)号：US06189380B1

公开(公告)日：2001-02-20

申请号：US09154983

申请日：1998-09-17

申请人： Tomoya Yamakawa ,  Shingo Hamada ,  Fumiyoshi Yonezawa ,  Takeharu Oshima ,  Satoru Kotoh ,  Hiroyuki Uramachi

发明人： Tomoya Yamakawa ,  Shingo Hamada ,  Fumiyoshi Yonezawa ,  Takeharu Oshima ,  Satoru Kotoh ,  Hiroyuki Uramachi

IPC分类号： G01F168

CPC分类号： G01F1/6842

摘要： A flow rate sensor comprises a fluid passage for a fluid to flow therealong; a main body structure arranged so as to turn its front end to the upstream side of the fluid and coaxially positioned within the fluid passage; and a detecting element disposed between the main body structure and the internal surface of the fluid passage. The main body structure is formed such that its cross section perpendicular to its central axis, at first becomes gradually larger from its front end towards its rear end and then becomes gradually smaller. The detecting element includes a ceramic substrate coated with a film made of a thermo-sensitive electrically resistant material. The film is formed into a meander pattern so as to form a flow rate detecting resistance. The detecting element further includes a fluid temperature compensating resistance.

摘要翻译： 流量传感器包括用于流体流过其的流体通道; 主体结构，其布置成将其前端转动到流体的上游侧并同轴地定位在流体通道内; 以及设置在主体结构和流体通道的内表面之间的检测元件。 主体结构形成为使得其垂直于其中心轴线的截面首先从其前端朝向后端逐渐变大，然后逐渐变小。 检测元件包括涂覆有由热敏电阻材料制成的膜的陶瓷基板。 该膜形成为曲折图案，以形成流量检测电阻。 检测元件还包括流体温度补偿电阻。

公开(公告)号：US06729182B2

公开(公告)日：2004-05-04

申请号：US10317117

申请日：2002-12-12

申请人： Hiroyuki Uramachi ,  Fumiyoshi Yonezawa ,  Tomoya Yamakawa

发明人： Hiroyuki Uramachi ,  Fumiyoshi Yonezawa ,  Tomoya Yamakawa

IPC分类号： G01F168

CPC分类号： G01F1/684 ,  G01F1/6842

摘要： In a flow rate sensor, a sensing passage, into which a fluid is introduced and in which a flow rate sensing element is disposed, a support member for supporting the sensing passage, and a circuit case, in which an electronic circuit unit for controlling the flow rate sensing element is accommodated, are formed integrally with each other, and the support member extends into a main passage through a hole opened to the main passage so as to position the sensing passage in the main passage. A structural member, the outside shape of which is formed to have a fluid resistance approximately similar to that of the portion of the support member extending from the hole, is disposed at a position approximately symmetrical with the portion of the support member extending from the hole about the sensing passage.

摘要翻译： 在流量传感器中，流体被引入并且其中设置有流量感测元件的感测通道，用于支撑感测通道的支撑构件，以及电路壳体，其中控制电子电路单元 流量检测元件被容纳在一起，并且支撑构件通过通向主通道的孔延伸到主通道中，以将检测通道定位在主通道中。 形成为具有与从孔延伸的支撑构件的部分大致相似的流体阻力的结构构件设置在与从孔延伸的支撑构件的部分大致对称​​的位置处 关于传感通道。

公开(公告)号：US06513375B2

公开(公告)日：2003-02-04

申请号：US09991907

申请日：2001-11-26

申请人： Hiroyuki Uramachi ,  Fumiyoshi Yonezawa ,  Tomoya Yamakawa

发明人： Hiroyuki Uramachi ,  Fumiyoshi Yonezawa ,  Tomoya Yamakawa

IPC分类号： G01F168

CPC分类号： G01F1/684 ,  G01F1/6842

摘要： In a flow rate sensor, a sensing passage, into which a fluid is introduced and in which a flow rate sensing element is disposed, a support member for supporting the sensing passage, and a circuit case, in which an electronic circuit unit for controlling the flow rate sensing element is accommodated, are formed integrally with each other, and the support member extends into a main passage through a hole opened to the main passage so as to position the sensing passage in the main passage. A structural member, the outside shape of which is formed to have a fluid resistance approximately similar to that of the portion of the support member extending from the hole, is disposed at a position approximately symmetrical with the portion of the support member extending from the hole about the sensing passage.

公开(公告)号：US06382023B1

公开(公告)日：2002-05-07

申请号：US09531220

申请日：2000-03-20

申请人： Fumiyoshi Yonezawa ,  Hiroyuki Uramachi ,  Tomoya Yamakawa

发明人： Fumiyoshi Yonezawa ,  Hiroyuki Uramachi ,  Tomoya Yamakawa

IPC分类号： G01F168

CPC分类号： G01F1/684 ,  G01F1/6842

摘要： To effect stable connection of an electrode of a sensing element to a connecting terminal, a holder for disposing the sensing element in a predetermined flow passage is provided. The holder is further provided with a rectification structure portion for rectifying the flow of an intake fluid and a connecting terminal securing portion with the connecting terminal embedded therein for fetching a signal of the sensing element, wherein the rectification structure portion and the connecting terminal securing portion are integrally formed by insulating material.

摘要翻译： 为了实现感测元件的电极到连接端子的稳定连接，提供了用于将感测元件设置在预定流动通道中的保持器。 保持器还设置有整流结构部分，用于整流进气流体的流动和连接端子固定部分，其中连接端子嵌入其中，用于取出感测元件的信号，其中整流结构部分和连接端子固定部分 由绝缘材料一体形成。

公开(公告)号：US06185998B1

公开(公告)日：2001-02-13

申请号：US08946918

申请日：1997-10-09

申请人： Fumiyoshi Yonezawa ,  Tomoya Yamakawa ,  Hiroyuki Uramachi

发明人： Fumiyoshi Yonezawa ,  Tomoya Yamakawa ,  Hiroyuki Uramachi

IPC分类号： G01M1500

CPC分类号： F02M35/021 ,  G01F1/6842 ,  G01F1/69 ,  G01F1/699

摘要： A heat sensitive flow amount sensor of the invention includes a measuring pipe disposed in the inlet pipe of an internal combustion engine, an air flow amount detecting element disposed in the measuring pipe for detecting the flow amount of intake air flowing in the inlet pipe making use of the fact that a quantity of heat loss corresponds to the flow amount of the intake air, and a straightening member disposed on the outer periphery of the measuring pipe along the axial line thereof for straightening the intake air flowing into the measuring pipe by straightening the intake air flowing in the inlet pipe. With this arrangement, even if the heat sensitive flow amount sensor is disposed in the vicinity of a throttle valve, the measuring accuracy of the flow amount of air is not lowered and the size of an internal combustion engine can be reduced by the employment of the heat sensitive flow amount sensor.

摘要翻译： 本发明的热敏流量传感器包括设置在内燃机的入口管中的测量管，设置在测量管中的空气流量检测元件，用于检测在使用中的入口管中流动的进气流量 其特征在于，一定量的热损失对应于进气的流量，以及设置在测量管的外周上的沿其轴线的矫正部件，用于矫正流入测量管中的进气， 入口管内流入的进气。 由此，即使将热敏流量传感器设置在节气门附近，也不会降低空气流量的测量精度，能够通过使用内燃机的尺寸来减小内燃机的尺寸 热敏流量传感器。

公开(公告)号：US06336361B1

公开(公告)日：2002-01-08

申请号：US09456012

申请日：1999-12-07

申请人： Hiroyuki Uramachi ,  Fumiyoshi Yonezawa ,  Tomoya Yamakawa

发明人： Hiroyuki Uramachi ,  Fumiyoshi Yonezawa ,  Tomoya Yamakawa

IPC分类号： G01F168

CPC分类号： G01F1/684 ,  G01F1/6842

摘要： In a flow rate sensor, a sensing passage, into which a fluid is introduced and in which a flow rate sensing element is disposed, a support member for supporting the sensing passage, and a circuit case, in which an electronic circuit unit for controlling the flow rate sensing element is accommodated, are formed integrally with each other, and the support member extends into a main passage through a hole opened to the main passage so as to position the sensing passage in the main passage. A structural member, the outside shape of which is formed to have a fluid resistance approximately similar to that of the portion of the support member extending from the hole, is disposed at a position approximately symmetrical with the portion of the support member extending from the hole about the sensing passage.

摘要翻译： 在流量传感器中，流体被引入并且其中设置有流量感测元件的感测通道，用于支撑感测通道的支撑构件，以及电路壳体，其中控制电子电路单元 流量检测元件被容纳在一起，并且支撑构件通过通向主通道的孔延伸到主通道中，以将检测通道定位在主通道中。 形成为具有与从孔延伸的支撑构件的部分大致相似的流体阻力的结构构件设置在与从孔延伸的支撑构件的部分大致对称​​的位置处 关于传感通道。

公开(公告)号：US06253606B1

公开(公告)日：2001-07-03

申请号：US09188375

申请日：1998-11-10

申请人： Fumiyoshi Yonezawa ,  Tomoya Yamakawa ,  Shingo Hamada ,  Takeharu Oshima ,  Satoru Kotoh ,  Hiroyuki Uramachi ,  Hidehito Yamauchi

发明人： Fumiyoshi Yonezawa ,  Tomoya Yamakawa ,  Shingo Hamada ,  Takeharu Oshima ,  Satoru Kotoh ,  Hiroyuki Uramachi ,  Hidehito Yamauchi

IPC分类号： G01F168

CPC分类号： G01F1/6842 ,  G01F1/684 ,  G01F1/692

摘要： A highly accurate thermosensitive flow rate sensor is able to reduce the detection error of a flow rate even in the case of a flow accompanied by considerable intake air pulsation in an automotive engine or the like. A flow rate detecting section disposed in a main pipe is equipped with a support member having a first guide surface and a second guide surface for guiding a fluid on opposite sides thereof, and a flow rate detection element provided on the second guide surface of the support member. The second guide surface of the support member, on which the flow rate detection element is mounted, extends longer than the first guide surface in the downstream direction.

摘要翻译： 高精度的热敏流量传感器即使在汽车发动机等中伴有相当大的进气脉动的流量的情况下也能够降低流量的检测误差。 设置在主管中的流量检测部分装备有具有第一引导表面和用于在其相对侧引导流体的第二引导表面的支撑构件，以及设置在支撑件的第二引导表面上的流量检测元件 会员。 其上安装有流量检测元件的支撑件的第二引导表面在下游方向上比第一引导表面延伸得更长。

公开(公告)号：US06240775B1

公开(公告)日：2001-06-05

申请号：US09179444

申请日：1998-10-27

申请人： Hiroyuki Uramachi ,  Tomoya Yamakawa ,  Fumiyoshi Yonezawa ,  Shingo Hamada ,  Takeharu Oshima ,  Satoru Kotoh

发明人： Hiroyuki Uramachi ,  Tomoya Yamakawa ,  Fumiyoshi Yonezawa ,  Shingo Hamada ,  Takeharu Oshima ,  Satoru Kotoh

IPC分类号： G01F1684

CPC分类号： G01F1/6842

摘要： A flow rate sensor comprises: a main fluid passage for a fluid to flow therealong; a detecting pipe conduit coaxially disposed in the main fluid passage; a temperature sensing element for sensing the temperature of the fluid; a flow rate sensing element including a flow rate detecting resistance made of a thermo-sensitive electrically resistant material, the flow rate detecting element being disposed in the main fluid passage in a manner such that the flow rate detecting resistance is exposed to the fluid flowing therethrough; and a control circuit for controlling an electric current flowing to the flow rate detecting resistance such that the temperature of the flow rate detecting resistance may be maintained at a predetermined value which is higher to some extent than a fluid temperature detected by the temperature sensing element. The main fluid passage involves a converged section whose passage cross sectional area becomes gradually smaller towards the downstream side thereof. At least one portion of an inner surface of the converged section cut by a plane containing the central axis of the main fluid passage is formed by a generally three dimensional curved surface. The inlet of the detecting pipe conduit is disposed in a direction in which the fluid flows, in a manner such that the inlet of the detecting pipe conduit is at a position close to the narrowest portion of the passage cross sectional area of the converged section.

摘要翻译： 流量传感器包括：用于使流体沿其流动的主流体通道; 同轴地设置在主流体通道中的检测管导管; 温度感测元件，用于感测流体的温度; 流量检测元件，其包括由热敏电阻材料制成的流量检测电阻，流量检测元件以使得流量检测电阻暴露于流过其中的流体的方式设置在主流体通道中 ; 以及控制电路，用于控制流向流量检测电阻的电流，使得流量检测电阻的温度可以保持在比由温度感测元件检测的流体温度高一定程度的预定值。 主流体通道包括会聚部分，其通道横截面积朝向其下游侧逐渐变小。 由包含主流体通道的中心轴线的平面切割的会聚部分的内表面的至少一部分由大致三维曲面形成。 检测管道的入口以流体流动的方向设置，使得检测管道的入口处于靠近会聚区段的通道横截面积的最窄部分的位置。