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1. 发明专利

JP2006283765A Physical quantity detection device for engine 有权
标题翻译：发动机物理量检测装置
公开(公告)号：JP2006283765A
公开(公告)日：2006-10-19
申请号：JP2006129008
申请日：2006-05-08
申请人： Hitachi Car Eng Co Ltd , Hitachi Ltd , 株式会社日立カーエンジニアリング , 株式会社日立製作所
发明人： WATANABE IZUMI , SAITO TADAO , OZAWA MASAYUKI , NAKADA KEIICHI , KAMIYAMA KEI
IPC分类号： F02D35/00 , F01N13/00 , F01N99/00 , G01F1/68 , G01F1/684 , G01L23/24 , G12B17/06
摘要： PROBLEM TO BE SOLVED: To prevent a deterioration in the precision of measurement of a sensor in hostile surroundings in terms of heat within an engine room of an automobile. SOLUTION: A structural member is provided which has low thermal conductivity and a low rate of radiation by using a resin member coated with metal for the structural member such as a subpassage 11a for mounting a detection element for detecting the temperature of suction air, a housing 15 or the like. Then a temperature rise caused by thermal conduction and a temperature rise caused by radiation heat can be reduced simultaneously. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了防止在汽车的发动机室内的热量方面的恶劣环境中的传感器的测量精度的劣化。解决方案：通过使用涂覆有金属的树脂构件来提供具有低导热性和低辐射率的结构构件，用于诸如用于检测吸入空气温度的检测元件的诸如子通路11a的结构构件，壳体15等。然后，可以同时降低由热传导引起的温度上升和由辐射热引起的温度升高。版权所有（C）2007，JPO＆INPIT

2. 发明专利

JPH1183584A HEATING RESISTOR TYPE AIR FLOW MEASURING DEVICE, BACKWARD FLOW JUDGING METHOD, AND ERROR-CORRECTING METHOD 失效
公开(公告)号：JPH1183584A
公开(公告)日：1999-03-26
申请号：JP24645197
申请日：1997-09-11
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： KOBAYASHI CHIHIRO , IGARASHI SHINYA , OZAWA MASAYUKI , SUGAYA ATSUSHI
IPC分类号： G01F1/68 , F02D41/18 , F02D45/00 , G01F1/696 , G01F1/698 , G01F1/72
摘要： PROBLEM TO BE SOLVED: To measure a flow rate accurately even in pulsation flow by judging the presence or absence of a backward flow based on the maximum and minimum values within a constant sampling time and performing correction. SOLUTION: A pulsation amplitude A=Qmax-Qmin is obtained from the maximum value Qmax and the minimum value Qmin in a memory, and at the same time a tentative average value B=(Qmax+Qmin)/2 is obtained. Then, based on the pulsation amplitude A and the average value B, the ratio A/B is obtained, and it is judged whether a backward flow exists in a suction pipe or not based on the value of the ratio A/B. With the judgment, a specific threshold is provided at the ratio value, it is judged that a backward flow exists when the threshold is exceeded, and it is judged that no backward flow exists when the threshold is not exceeded. When it is judged that no backward flow exists, no correction is made and the value is outputted as an air flow signal. On the other hand, when it is judged that a backward flow exists, a correction value corresponding to the ratio is calculated and a value that is obtained by correcting a pulsation waveform is outputted as an air flow signal, thus accurately controlling the fuel of an engine accurately.

3. 发明专利

JPH0953482A THROTTLE BODY INTEGRATED AIR FLOW MEASURING DEVICE 失效
公开(公告)号：JPH0953482A
公开(公告)日：1997-02-25
申请号：JP21081895
申请日：1995-08-18
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： HIRAYAMA HIROSHI , IGARASHI SHINYA , ITSUJI TAKAYUKI , OZAWA MASAYUKI , KOBAYASHI CHIHIRO , NAGAYAMA KAZUO , YAMASHITA MITSURU
IPC分类号： F02D9/10 , F02D35/00
摘要： PROBLEM TO BE SOLVED: To obtain a throttle body integrated air flow measuring device, in which a measurement error caused by the change of throttle valve opening is reduced, and which is good in handling efficiency. SOLUTION: An air flow measuring device includes a throttle valve 12 turned on a throttle shaft 13 to open and close an air passage 5, and a heating resistor type air flow measuring part 70 disposed in the air passage 5 on the upstream side of the throttle valve 12 for measuring the air flow, and is assembled integrally with a throttle body 3 for forming the air passage 5. The throttle body 3 is so constructed that the sectional form of the air passage 5 in the throttle valve 12 arrangement surface is circular and the sectional form of the air passage 5 in the upstream and downstream side surfaces of the heating resistor type air flow measuring part 70 or the heating resistor type air flow measuring part 70 arrangement surface is non-circular in such a manner as to have a major axis parallel to the axial direction of the throttle shaft 13.

4. 发明专利

JP2008292508A Heat generation resistor type flow measuring instrument 有权
标题翻译：热发生电阻型流量测量仪器
公开(公告)号：JP2008292508A
公开(公告)日：2008-12-04
申请号：JP2008229204
申请日：2008-09-08
申请人： Hitachi Car Eng Co Ltd , Hitachi Ltd , 株式会社日立カーエンジニアリング , 株式会社日立製作所
发明人： SAITO TADAO , OZAWA MASAYUKI , IGARASHI SHINYA , ONIKAWA HIROSHI , YASUKAWA AKIO , TAKASAGO AKIRA
IPC分类号： G01F1/684
摘要： PROBLEM TO BE SOLVED: To provide a reliable slot-in type heat generation resistor type flow measuring instrument which has excellent vibration resistance, and also has structure for preventing a characteristic error caused by heat effect of an internal combustion engine. SOLUTION: The flow measuring instrument comprises: a housing provided between a frame body 4 and a connector 2 and having a support part 3 as a fixing part on a mounting part of a body 15 for forming a fluid passage; flow detection elements 7, 8 held on a frame body side of the housing; and an electronic circuit 6 held on the housing and electrically connected to the flow detection elements and connector. A highly rigid member 22 with higher rigidity than material of a main constituting member of the housing is integrally molded with the support part. The housing is positioned on the fluid passage by at least one projection 23 and a recessed part for receiving the projection provided between the mounting part and the support part. The housing is thereby fixed on the mounting part of the body through the highly rigid member. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种耐振动性优异的可靠的插入式发热电阻型流量计，还具有防止内燃机的热影响引起的特性误差的结构。流量测量装置包括：壳体，设置在框架体4和连接器2之间，并且具有作为固定部分的支撑部分3，用于形成流体通道的主体15的安装部分; 保持在壳体的框体侧的流量检测元件7,8; 以及电子电路6，其保持在壳体上并电连接到流量检测元件和连接器。与壳体的主要构成构件的材料相比刚性高的高度刚性构件22与支撑部一体地模制。壳体通过至少一个突起23和用于接收设置在安装部和支撑部之间的突起的凹部而位于流体通道上。因此，壳体通过高度刚性的构件固定在主体的安装部分上。版权所有（C）2009，JPO＆INPIT

5. 发明专利

JP2004219134A Sealing member for flow rate measuring instrument 审中-公开
公开(公告)号：JP2004219134A
公开(公告)日：2004-08-05
申请号：JP2003004088
申请日：2003-01-10
申请人： Hitachi Car Eng Co Ltd , Hitachi Ltd , 株式会社日立カーエンジニアリング , 株式会社日立製作所
发明人： KOBAYASHI CHIHIRO , IGARASHI SHINYA , ONIKAWA HIROSHI , OZAWA MASAYUKI
IPC分类号： G01F1/00 , G01F1/68 , G01F15/18
摘要： PROBLEM TO BE SOLVED: To provide a sealing member for flow rate measuring instrument that can suppress the fall of sealability even against the vibration etc., of an internal combustion engine, etc., while the member has good assembling workability.
SOLUTION: The sealing member 6 has lip-like projections on the outer peripheral side of its cross section. Lip sections C are inclined with respect to the sealing surface A of the member 6 and the member 6 is constituted to seal an object to be sealed when the front end sections of the lip sections C are crushed. When a negative pressure occurs, the member 6 is deformed to the negative pressure side and, in addition, the sealability of the member 6 is improved, because the crushed amounts of the lip sections C become larger. When an air flow rate measuring instrument and an intake pipe are actually assembled together, the lip sections C are crushed as compared with their shapes before the instrument and pipe are assembled together and the member 6 seals on the lip sections C sides. The sealing member 6 can improve the assembling workability of the assembling work, because the member 6 can be crushed easily at the time of assembling the measuring instrument and intake pipe together.
COPYRIGHT: (C)2004,JPO&NCIPI

6. 发明专利

JP2001311637A FLOW RATE-MEASURING DEVICE, PHYSICAL DETECTING DEVICE, AND ENGINE SYSTEM 失效
公开(公告)号：JP2001311637A
公开(公告)日：2001-11-09
申请号：JP2001046983
申请日：2001-02-22
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： WATANABE IZUMI , SAITO TADAO , OZAWA MASAYUKI , NAKADA KEIICHI , KAMIYAMA KEI
IPC分类号： G01F1/684 , F02D35/00 , F02D45/00 , G01F1/692 , G01K1/14 , G01K7/16 , G01L9/04 , G01L19/00 , G01L19/06
摘要： PROBLEM TO BE SOLVED: To prevent the measurement accuracy of a sensor from deteriorating under a thermally harsh environment in the engine room of an automobile. SOLUTION: By using a resin member that is covered with metal for such a structure member as a sub channel 11a and a housing l 5 for packaging a suction air temperature detection element, a component member with less heat conduction rate and radiation rate is formed, thus simultaneously reducing temperature increase by heat conduction and that by radiation heat.

7. 发明专利

JPH11351931A HEATING RESISTOR TYPE AIR FLOW AIR MEASURING DEVICE 失效
公开(公告)号：JPH11351931A
公开(公告)日：1999-12-24
申请号：JP16176598
申请日：1998-06-10
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： OZAWA MASAYUKI , KOBAYASHI CHIHIRO , IGARASHI SHINYA
IPC分类号： G01F1/68 , G01F1/684
摘要： PROBLEM TO BE SOLVED: To supply an air flow rate measuring device that can be used easily by supplying a small air sub-path. SOLUTION: In an air sub-path 11, a temperature sensing resistor 8 is arranged at the upstream of the heating resistor and at a position being offset for the heating resistor in a direction that is vertical to the flow direction of a main air path, and the shape of the air sub-path 11 is in structure where the thermally sensitive resistor 8 from the downstream of the temperature sensing resistor 8 to the upstream of the heating resistor is contracted only on one side wall surface in a direction where the temperature sensing resistor 8 from the downstream of the temperature sensing resistor 8 to the upstream of the heating resistor is offset.

8. 发明专利

JP2003130701A HEATED RESISTOR MEASURING DEVICE FOR AIR FLOW RATE, AND AIR INTAKE SYSTEM, AND CONTROL SYSTEM FOR INTERNAL COMBUSTION ENGINE 审中-公开
公开(公告)号：JP2003130701A
公开(公告)日：2003-05-08
申请号：JP2002231055
申请日：2002-08-08
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： IGARASHI SHINYA , TAKASAGO AKIRA , OZAWA MASAYUKI , UCHIYAMA KAORU , TSUTSUI MITSUKUNI
IPC分类号： G01F1/684 , F02D35/00
摘要： PROBLEM TO BE SOLVED: To provide a heated resistor measuring device for an air flow rate having high accuracy, reliability, and excellent mountability at a low price. SOLUTION: The heated resistor measuring device for the air flow rate is composed of a flow meter body 86 and a measuring part 87, where a housing 3 containing an electronic circuit 6 and a sub-passage member 4 having a heated resistor 1 in an air sub-passage are individually divided and formed to be fixed. In the measuring part 87, the connector 32 of the housing 3, a frame body 31, and the sub-passage member 4 are formed to a flat shape. The measuring part 87 is inserted from an insertion hole 83 to arrange the heated resistor 1 in the main air passage 81. Then the fixing flange 36 of the housing 3 is installed on the flow meter body 86.

9. 发明专利

JP2002107201A FLOW MEASURING DEVICE 失效
公开(公告)号：JP2002107201A
公开(公告)日：2002-04-10
申请号：JP2000302825
申请日：2000-09-29
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： KONO TSUTOMU , ONIKAWA HIROSHI , NISHIMURA YOSHIMICHI , OKAZAKI ISAO , OZAWA MASAYUKI , IIDA MAKOTO , IGARASHI SHINYA , TOKI MASAYUKI
IPC分类号： G01F15/18 , F02D35/00 , G01F1/684
摘要： PROBLEM TO BE SOLVED: To ensure airtightness and a waterproofing property of a complex integral molding product using a pre-mold. SOLUTION: A step 13 is formed on the seal surface 23 of a flange 4 where a flow measuring device comes in contact with a structure 10 having airtight structure, the inside 11 of the step is projected in the direction coming in contact with the structure 10 to the outside 12, and only a part of the inside 11 of the stem is brought into contact with the structure 10. By forming the flange 4 having the step 13, holes 3 for flange fitting screws are formed on the outside 12 of the step, and when the flange is fit with the screws, since only the seal surface of inside 11 of the step comes in contact with the structure 10, high flatness is required to only a part on the inside 11 of the step. A rib 18 is formed on a surface 15 opposite to the seal surface 23 of the flange 4, a cross section shape connecting the centers of the screw holes 3 on a diagonal line is slightly warped so as to recess in the direction of the structure 10 to be fit, thereby reduces residual stress in the fitting of the flange 4.

10. 发明专利

JPH1123336A HEATING RESISTOR TYPE APPARATUS FOR MEASURING AIR FLOW RATE 失效
公开(公告)号：JPH1123336A
公开(公告)日：1999-01-29
申请号：JP17349997
申请日：1997-06-30
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： OZAWA MASAYUKI , IGARASHI SHINYA , KOBAYASHI CHIHIRO
IPC分类号： G01P5/12 , G01F1/68 , G01F1/684 , G01P5/10
摘要： PROBLEM TO BE SOLVED: To prevent a decrease in flow velocity at a heating resistor part set at a sub air path and enable highly accurate measurements by providing a hole connecting a main air path and the sub air path at a wall face of the sub air path parallel to a direction of a flow of a main air. SOLUTION: A sub air path 2 is arranged in an air flow rate body 3 forming a main air path 1, with having a heat-generating resistance body 4 and a temperating resistor 5 both electrically connected to a module 7 via a supporting part 6. A hole 8 connecting the sub air path 2 with the main air path 1 is formed at a wall face which is nearly parallel to a direction of a flow of a main air of the sub air path 2 between the heating resistor 4 and an exit of the sub air path 2. A flow velocity of the main air path 1 is higher than a flow velocity at the sub air path 2 in the vicinity of the hole 8, and a larger pressure difference is brought about by the sub air path 2 at openings of the hole 8 than by the main air path 1. The air is sent because of the pressure difference from the sub air path 2 to the main air path 1. As a result, a flow velocity at the heating resistor 4 becomes a total flow velocity of flow velocities at the sub air path 2 and hole 8, that is, the flow velocity is increased.

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