公开(公告)号：US5797380A

公开(公告)日：1998-08-25

申请号：US968972

申请日：1997-11-12

申请人： Yasuo Tada ,  Tomoya Yamakawa ,  Hiroyuki Uramachi

发明人： Yasuo Tada ,  Tomoya Yamakawa ,  Hiroyuki Uramachi

IPC分类号： F01M13/00 ,  F02D9/10 ,  F02D35/00 ,  F02M35/04 ,  F02M35/10 ,  F02M23/14

CPC分类号： F02M35/10222 ,  F02M35/021 ,  F02M35/10019 ,  F02M35/10255 ,  F02M35/10386 ,  F05C2201/021 ,  F05C2225/08

摘要： An air intake system for an internal combustion engine which does not impair detection performance of a flow sensor without impairing intrinsic function thereof even when a distance between the flow sensor (4) and as inlet port (80) for a recirculating air is dimensioned short. The air intake system includes a recirculating air passage (8) for recirculating a blow-by gas (B) leaking into a crankcase (13) connected to an engine cylinder (1) to an intake air passage (2a). A positive crankcase ventilation system is provided which includes a communicating passage (18) for communicating interior of the crankcase (13) with that of a head cover assembly (14) of the cylinder (1), a recirculating passage (6) for introducing the blow-by gas (B) from the head cover assembly (14) into an intake air passage (2a) at a location downstream of a throttle valve (24), and a recirculating air passage (8) for introducing the recirculating air into the head cover assembly (14) from the intake air passage (2a) at a location intermediate between the flow sensor (4) and the throttle valve (24). The recirculating air passage (8) has a suction member (81) having one end portion disposed within the intake air passage (2a). The suction member (81) defines an air inlet passage having an inlet port (80) provided in the one end portion located at a downstream side relative to the center of the one end portion within the intake air passage (2a). Disturbance in the air stream occurring at the flow sensor is suppressed. Besides, protecting the flow sensor is protected against contamination even when the blow-by gas injected from the recirculating air passage (8).

摘要翻译： 即使当流量传感器（4）和作为循环空气的入口（80）之间的距离尺寸较小时，也不会损害流量传感器的检测性能而不损害其内在功能的内燃机的进气系统。 进气系统包括用于使泄漏到连接到发动机气缸（1）的曲轴箱（13）中的窜气（B）再循环到进气通道（2a）的再循环空气通道（8）。 提供一种正曲轴箱通风系统，该系统包括用于将曲轴箱（13）的内部与气缸（1）的头罩组件（14）的内部连通的连通通道（18），用于引导 湍流气体（B）从头盖组件（14）进入到节流阀（24）下游位置的进气通道（2a）中;以及再循环空气通道（8），用于将循环空气引入 在所述流量传感器（4）和所述节流阀（24）之间的位置处，所述头罩组件（14）从所述进气通道（2a）开始。 再循环空气通路（8）具有吸入部件（81），该吸引部件具有设置在吸气通道（2a）内的一端部。 抽吸构件（81）限定空气入口通道，其具有设置在相对于进气通道（2a）内的一个端部的中心的下游侧的一个端部中的入口（80）。 抑制在流量传感器处发生的空气流中的干扰。 此外，即使当从再循环空气通道（8）喷射的窜气气体时，保护流量传感器也免受污染。

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：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。

公开(公告)号：US6018994A

公开(公告)日：2000-02-01

申请号：US998035

申请日：1997-12-23

申请人： Fumiyoshi Yonezawa ,  Tomoya Yamakawa ,  Hiroyuki Uramachi

发明人： Fumiyoshi Yonezawa ,  Tomoya Yamakawa ,  Hiroyuki Uramachi

IPC分类号： G01F15/00 ,  F02D35/00 ,  G01F1/68 ,  G01F1/684 ,  G01F5/00

CPC分类号： G01F5/00 ,  G01F1/684 ,  G01F1/6842

摘要： Plate-like straightening members are provided between a main conduit and a metering pipe stored in the main conduit to suppress the deviation of a flow of a fluid in the main conduit and stabilize a flow in the metering pipe.

摘要翻译： 板状矫直构件设置在主管道和存储在主管道中的计量管之间，以抑制主管道中的流体流动的偏差并稳定计量管道中的流量。

公开(公告)号：US06871534B1

公开(公告)日：2005-03-29

申请号：US09425630

申请日：1999-10-22

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

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

IPC分类号： G01F1/68 ,  F02D35/00 ,  F02D41/18 ,  F02M35/04 ,  G01F1/684 ,  G01F1/69 ,  G01F5/00

CPC分类号： G01F5/00 ,  F02D41/185 ,  F02D41/187 ,  F02M35/021 ,  G01F1/6842

摘要： A post in a fluid passage for passing a fluid flow extends across a part of the fluid flow; a measuring duct in the post extends through the post; and a flow rate detector is located in the measuring duct. The measuring duct has a fluid introduction port with an elongated shape, the measuring duct is constricted and has at least a portion located between the fluid introduction port and the flow rate detector, substantially smoothly narrowing toward a downstream direction of the flow in a longitudinal direction of the elongated shape.

摘要翻译： 用于通过流体流动的流体通道中的柱延伸穿过流体流的一部分; 柱中的测量管延伸穿过柱; 并且流量检测器位于测量管道中。 测量管道具有细长形状的流体导入口，测量管道收缩，并且至少有一部分位于流体导入口和流量检测器之间，沿着纵向朝向流动的下游方向大致平滑地变窄 的细长形状。

公开(公告)号：US06868722B2

公开(公告)日：2005-03-22

申请号：US10773295

申请日：2004-02-09

申请人： Koji Tanimoto ,  Hiroyuki Uramachi ,  Tomoya Yamakawa ,  Shingo Hamada

发明人： Koji Tanimoto ,  Hiroyuki Uramachi ,  Tomoya Yamakawa ,  Shingo Hamada

IPC分类号： G01F1/68 ,  G01F1/684 ,  G01F5/00 ,  G01F15/12 ,  G01M19/00 ,  G01P5/00

CPC分类号： G01F15/12 ,  G01F1/6842 ,  G01F5/00

摘要： A diversion passage is constructed into an inverted U shape in which an upstream diversion passage and a downstream diversion passage each having a passage direction in a direction of projection of a detector flow tube communicate by means of a curved portion. An inflow port is constructed by removing a portion of a wall of the upstream diversion passage on an upstream side in the main direction of flow, and removing a portion of first and second side walls of the upstream diversion passage facing each other in a direction perpendicular to the main direction of flow and the direction of projection of the detector flow tube. In addition, a wall surface on a downstream side of the upstream diversion passage in the main direction of flow at the inflow port is formed into a curved surface shape that is gradually displaced upstream relative to the direction of projection of the detector flow tube to constitute an air lead-in surface.

摘要翻译： 分流通道构造成倒U形，其中上游分流通道和下游分流通道各自具有在检测器流管的投影方向上的通过方向通过弯曲部分连通。 通过在主流动方向的上游侧除去上游引流通道的壁的一部分而形成流入口，并且将上游引流通道的第一侧壁和第二侧壁的一部分沿垂直方向 到主流动方向和检测器流管的投影方向。 另外，上游侧分流通路的流入口主流方向的下游侧的壁面形成为相对于检测器流管的投影方向向上游逐渐偏移的曲面形状 空气导入表面。