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1. 发明专利

JP2006258675A Flow sensor 有权
标题翻译：流量传感器
公开(公告)号：JP2006258675A
公开(公告)日：2006-09-28
申请号：JP2005078379
申请日：2005-03-18
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NAKADA KEIICHI , IDE KIYOTOMO , MORINO TAKESHI , SATO AKIRA
IPC分类号： G01F1/684 , F02D35/00
摘要： PROBLEM TO BE SOLVED: To provide a reliable flow sensor with a small manufacturing variation in mass production. SOLUTION: In the flow sensor, the throttle shape near a flow rate measuring element of a sub passage is constituted so that the flow direction of air coming into the sub passage having a curved section of which diameter gradually becomes small toward the upstream is directed to the direction of the flow rate measuring element. Thus, the manufacturing variation is reduced. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供可靠的流量传感器，其批量生产的制造变化小。解决方案：在流量传感器中，子通道的流量测量元件附近的节气门形状构成为使得流入副通路的空气的流动方向的直径朝向上游逐渐变小指向流量测量元件的方向。因此，制造变化减小。版权所有（C）2006，JPO＆NCIPI

2. 发明专利

JP2007113978A Heating resistor type air flow measuring instrument 有权
标题翻译：加热电阻式空气流量测量仪
公开(公告)号：JP2007113978A
公开(公告)日：2007-05-10
申请号：JP2005303819
申请日：2005-10-19
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KOBAYASHI CHIHIRO , IGARASHI SHINYA , KATO YUKIO , IDE KIYOTOMO , MORINO TAKESHI , OKAMOTO HIROKI , SAITO TADAO
IPC分类号： G01F1/69 , G01F1/684 , G01F15/12
摘要： PROBLEM TO BE SOLVED: To secure measuring precision for a heating resistor type air flow measuring instrument, to reduce a characteristic variation caused by deposition of dust, in particular, to restrain the characteristic variation to the minimum even in case of a nano-particle size of soot (carbon). SOLUTION: The measuring precision for a flowmeter and the reduction of the dust deposition are compatible by differing an air striking angle to a heating resistor from a colliding angle of dust. For example, the heating resistor is arranged inclinedly in a downstream of a curved apex of a curved passage, the dust flies in along a direction separated toward an outside of a curve by centrifugal force, even in the light-weight of soot in a midway of the curved passage, and an air-flowing angle is differed from a collision angle with the dust flying in to collide with a heat radiation face of the heating resistor. The dust is thereby difficult to be deposited because of an air flow, by making steep a collision angle of the dust onto the heat radiation face of the heating resistor while keeping the measuring precision of the flowmeter. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题为了确保加热电阻式空气流量测量仪的测量精度，为了减少灰尘沉积引起的特性变化，特别是即使在纳米尺寸的情况下也将特性变化抑制到最小烟灰（碳）的粒径。
解决方案：流量计的测量精度和灰尘沉积的减少可以通过与灰尘的碰撞角度与加热电阻器的空气入射角不同而兼容。例如，加热电阻器倾斜地布置在弯曲通道的弯曲顶点的下游，灰尘通过离心力沿着与曲线外部分离的方向飞行，即使在中途的烟灰的重量轻并且空气流动角度与灰尘飞散的碰撞角度不同，以与加热电阻器的散热面碰撞。因此，通过在保持流量计的测量精度的同时使灰尘在加热电阻器的散热面上产生陡峭的碰撞角度，因此由于气流难以沉积灰尘。版权所有（C）2007，JPO＆INPIT

3. 发明专利

JP2004144617A Hot wire flowmeter 有权
公开(公告)号：JP2004144617A
公开(公告)日：2004-05-20
申请号：JP2002310018
申请日：2002-10-24
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： ANDO AKIRA , IDE KIYOTOMO
IPC分类号： G01F1/696
摘要： PROBLEM TO BE SOLVED: To provide a hot wire flowmeter permitting a wide range of flow rate measurement, in which a heat generating resistor of a flow rate detection circuit (hot wire driving circuit) is prevented from overheated, even at the time when an abnormality such as the failure of the flow rate detection circuit (hot wire driving circuit) of the hot wire flowmeter has occurred, and the damage or the like of the flow rate detection circuit is prevented. SOLUTION: In the hot wire flowmeter having the flow rate detection circuit for detecting the flow rate of a fluid, the flow rate detection circuit 100 includes the hot wire driving circuit 101 having the heat generating resistor 1 which is disposed in a fluid passage and in which the resistance value varies according to the temperature and an overheating prevention circuit 102 which detects the resistance value of the heat generating resistor 1 and which limits the variation in the resistance value of the heat generating resistor 1. COPYRIGHT: (C)2004,JPO

4. 发明专利

JP2009008461A Pressure detecting device 审中-公开
标题翻译：压力检测装置
公开(公告)号：JP2009008461A
公开(公告)日：2009-01-15
申请号：JP2007168360
申请日：2007-06-27
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： IDE KIYOTOMO , NAKABAYASHI KENJI , KONUKI HIROSHI , KUBO JUN , KIKUCHI KATSUHIKO , KAMINAGA TOSHIAKI
IPC分类号： G01L19/06
摘要： PROBLEM TO BE SOLVED: To solve the problem wherein, when a pressure detection device is loaded for an automobile, especially in an exhaust environment, a very strongly acidic material such as exhaust condensate or various pollutant products generated by engine combustion reaches the pressure detection device.
SOLUTION: A simple structure is used, wherein a protection sheet excellent in waterproofness and acid resistance, having permeability is mounted on an introduction port for pressure detection, and sealed and fixed by press-fitting of a mounting ring and by an adhesive. Hereby, a semiconductor sensor is protected from the exhaust environment of an internal combustion engine or the like without changing a sensor characteristic such as responsiveness, and durability and reliability are improved.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：解决的问题为了解决当汽车负载压力检测装置尤其是在排气环境中时，诸如排气冷凝物或发动机燃烧产生的各种污染物质的非常强酸性的材料到达压力检测装置。解决方案：使用简单的结构，其中具有渗透性的防水性和耐酸性优异的保护片安装在用于压力检测的引入口上，并通过安装环和粘合剂的压配而被密封和固定。因此，半导体传感器在不改变诸如响应性的传感器特性的情况下被保护以免于内燃机等的排气环境，并且提高了耐久性和可靠性。版权所有（C）2009，JPO＆INPIT

5. 发明专利

JP2007298481A Flow measuring instrument 有权
标题翻译：流量测量仪
公开(公告)号：JP2007298481A
公开(公告)日：2007-11-15
申请号：JP2006128863
申请日：2006-05-08
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： OKAMOTO HIROKI , IGARASHI SHINYA , KOBAYASHI CHIHIRO , IDE KIYOTOMO , MORINO TAKESHI
IPC分类号： G01F1/684 , F02D35/00 , G01F1/00 , G01F1/68
CPC分类号： G01F1/72 , G01F1/6842 , G01F5/00
摘要： PROBLEM TO BE SOLVED: To provide a thermal type flow measuring instrument capable of restraining an output from dropping to a minus side, although the output drops to the minus side in an abrupt change of a flow rate, in a conventional flow measuring instrument provided with a sub-air-passage having a thermal type flow measuring instrument by-pass passage and having a hole in this side of a flow measuring part. SOLUTION: A slit hole is opened in a downstream of a flow detecting element positioned in a downstream after passage bypass. The slit hole may be positioned between the flow detecting element and an outlet part, and may be favorably drilled between a wall face side and a recessed portion. The output is restrained from dropping to the minus side in leading-up, by this manner. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种能够抑制输出下降到负侧的热式流量测量装置，尽管在传统的流量测量中，输出在流量的急剧变化中下降到负侧设置有具有热式流量测量仪器旁通通道并且在流量测量部件的该侧面具有孔的副空气通道的仪器。解决方案：在通过旁路位于下游的流量检测元件的下游，开口狭缝孔。狭缝孔可以位于流量检测元件和出口部之间，并且可以有利地在壁面侧和凹部之间钻孔。通过这种方式，输出被限制在前导中的负侧。版权所有（C）2008，JPO＆INPIT

6. 发明专利

JP2008175150A Air flow rate measuring device 审中-公开
标题翻译：空气流量测量装置
公开(公告)号：JP2008175150A
公开(公告)日：2008-07-31
申请号：JP2007009694
申请日：2007-01-19
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： MIKI TAKAHIRO , IDE KIYOTOMO , KADOHIRO TAKASHI
IPC分类号： F02D35/00 , G01F1/68
摘要： PROBLEM TO BE SOLVED: To solve a problem on NOx reduction control, wherein change of air flow rate in an air flow rate measuring device part is physically delayed even when EGR gas flow rate changes since a supercharger, an intercooler, a duct and the like are installed between the air flow rate measuring device and an EGR return position in a today's installation position upstream of the supercharger.
SOLUTION: In an internal combustion engine having the supercharger, installation of the air flow rate measuring device at a position as close to the EGR gas return part as possible, is enabled by installing the same on a downstream side of the supercharger. Reduction effect of exhaust gas, mainly NOx especially in a transient condition is thereby exhibited since change of flow rate of EGR gas is accurately measured one by one.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：解决的问题：为了解决NOx增加控制的问题，其中即使在EGR增压器，中间冷却器，管道等的EGR气体流量变化时，空气流量测量装置部分的空气流量的变化也被物理地延迟等安装在空气流量测量装置和增压器上游的当今安装位置的EGR返回位置之间。解决方案：在具有增压器的内燃机中，通过将其安装在增压器的下游侧，能够将空气流量测量装置安装在尽可能靠近EGR气体返回部件的位置。因此，由于EGR气体的流量的变化被逐个精确地测量，所以表现出排气的主要是NOx，尤其是在瞬态状态下的排气效果。版权所有（C）2008，JPO＆INPIT

7. 发明专利

JP2008145241A Heating resistor type gas flow-rate measuring device 审中-公开
标题翻译：加热电阻式气体流量测量装置
公开(公告)号：JP2008145241A
公开(公告)日：2008-06-26
申请号：JP2006332080
申请日：2006-12-08
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KOBAYASHI CHIHIRO , KATO YUKIO , IDE KIYOTOMO , MORINO TAKESHI , OKAMOTO HIROKI
IPC分类号： G01F1/684
摘要： PROBLEM TO BE SOLVED: To provide a heating resistor type gas flow-rate measuring device capable of accurately and stably measuring gas flow-rate over a long term with preventing from depositing of salt on the heating resistor and minimizing variation of properties of the heating resistor in a heating resistor type gas flow-rate measuring device which measures gas flow-rate based on the heat release quantity from the heating resistor when making heating current flow to heat the heating resistor at high temperature. SOLUTION: A heating resistor type gas flow-rate measuring device measures gas flow-rate based on the heat release quantity from a heating resistor 3 by carrying heating current to the heating resistor to heat it up to over 120°C. The heat generation resistor 3 is fixed and supported by the lead member 5 composed of a conductive member. A shelter 7 is arranged at the upstream side of the lead member, and when the heating resistor type gas flow-rate measuring device is being driven, the place of the lead member, of which surface temperature is about 100°C, is shielded by the shelter 7. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种能够通过防止在加热电阻器上沉积盐并且最小化特性的变化而能够长期准确稳定地测量气体流速的发热电阻器型气体流量测量装置加热电阻式气体流量测量装置中的加热电阻器，其在使加热电流流动时基于来自加热电阻器的放热量来测量气体流量，以在高温下加热发热电阻器。解决方案：加热电阻器类型的气体流量测量装置通过将加热电流传递到加热电阻器将其加热到超过120℃，根据来自加热电阻器3的放热量来测量气体流量。发热电阻体3被由导电部件构成的引线部件5固定并支撑。在引线部件的上游侧设置有防护罩7，在加热电阻式气体流量测量装置被驱动时，表面温度为约100℃的引线部件的位置被避风港7.版权所有（C）2008，JPO＆INPIT

8. 发明专利

JP2008058128A Thermal type gas flow measuring apparatus 有权
标题翻译：热式气体流量测量装置
公开(公告)号：JP2008058128A
公开(公告)日：2008-03-13
申请号：JP2006234855
申请日：2006-08-31
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： MORINO TAKESHI , KOBAYASHI CHIHIRO , HIKODA MARI , KATO YUKIO , IDE KIYOTOMO , OKAMOTO HIROKI
IPC分类号： G01F1/684 , G01F1/00 , G01F1/68 , G01F1/72
摘要： PROBLEM TO BE SOLVED: To reduce an increased error while maintaining a centrifugation effect of a roundabout section in a secondary channel. SOLUTION: In an air flowmeter employing a roundabout structure on the upstream side of a heating resistor in the secondary channel, a step 105 is disposed near an exit part of the secondary channel as shown in Fig.1-a. Therefore, the channel resistance in the secondary channel is increased, and such the characteristic is obtained that the higher the flow rate is, the slower the flow velocity is in the vicinity of the heating resistor. According to this effect, the pressure loss in the secondary channel can be changed while maintaining the function of the centrifugation by disposing the step on the downstream side of the heating resistor, thereby improving its pulsation characteristic. Therefore, a pulsation error can be improved without impairing any inertial force of roundabout channels. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了减少在第二通道中保持迂回部分的离心效应的增加的误差。解决方案：在第二通道中的加热电阻器的上游侧采用回旋结构的空气流量计中，如图1-a所示，在第二通道的出口部分附近设置步骤105。因此，次级通道中的通道电阻增加，并且获得流量越高，流速在加热电阻器附近越慢的特性。根据该效果，通过在加热电阻体的下游侧配置台阶，能够保持二次流路的压力损失，同时保持离心功能，从而提高其脉动特性。因此，可以在不损害迂回通道的任何惯性力的情况下提高脉动误差。版权所有（C）2008，JPO＆INPIT

9. 发明专利

JP2007285950A Heating resistor type air flowmeter 审中-公开
标题翻译：加热电阻式空气流量计
公开(公告)号：JP2007285950A
公开(公告)日：2007-11-01
申请号：JP2006115136
申请日：2006-04-19
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KOBAYASHI CHIHIRO , IGARASHI SHINYA , KATO YUKIO , IDE KIYOTOMO , MORINO TAKESHI , OKAMOTO HIROKI
IPC分类号： G01F1/698 , F02D35/00 , G01F1/684 , G01F1/69
摘要： PROBLEM TO BE SOLVED: To minimize a property change of a heating resistor type air flowmeter, by reducing adhesion of oil components generated, especially by PCV, EGR, etc. aimed at securing measurement accuracy of the flowmeter and reducing the characteristic changes due to dust adhesion. SOLUTION: The heating temperature of a heating resistor for suction air is set at 230-290°C. Thus, even when oil is dispersed, the oil evaporates in short time. It is also possible to guarantee long-term accuracy, in terms of the reliability of an ON/OFF repeating test or the like. COPYRIGHT: (C)2008,JPO&INPIT

10. 发明专利

JP2003083789A Flow rate-measuring apparatus 审中-公开
标题翻译：流量测量装置
公开(公告)号：JP2003083789A
公开(公告)日：2003-03-19
申请号：JP2001276679
申请日：2001-09-12
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： KAMIYAMA KEI , WATANABE IZUMI , IDE KIYOTOMO
IPC分类号： G01F1/00 , G01F1/684 , G01F15/14
摘要： PROBLEM TO BE SOLVED: To provide a reliable flow rate-measuring apparatus having a structure for preventing gas from entering from a passage where gas to be measured flows to an electronic circuit section without increasing costs greatly. SOLUTION: A sub passage 2 incorporating flow rate detection elements 3a and 3b is arranged in a passage 1 where gas to be measured flows, and the detection elements 3a and 3b are supported by metal terminal pins 4a and 4b and are connected to an electronic circuit 6. On portion of the terminal pins 4a and 4b is exposed to the outside of passages 1 and 2 by separate holes 5a and 5b. Even if a corrosive gas or the like enters the gap between the resins of the terminal pins 4a and 4b from the passage 2, the gas is dispersed into the air from the holes 5a and 5b if the gas reaches the holes 5a and 5b and does not enter the inside of a housing case 7 where the electronic circuit 6 is located. Additionally, only a process for forming the holes 5a-5d may be added, thus preventing manufacturing costs from increasing greatly.
摘要翻译：要解决的问题：提供一种可靠的流量测量装置，其具有防止气体从要测量的气体流入电子电路部分的通道的结构，而不会大大增加成本。解决方案：一个流量检测元件3a和3b的副通道2设置在通道1中，待测气体流动，检测元件3a和3b由金属端子销4a和4b支撑，并连接到电子电路端子销4a和4b的一部分通过单独的孔5a和5b暴露于通道1和2的外部。即使腐蚀性气体等从通道2进入端子销4a和4b的树脂之间的间隙，如果气体到达孔5a和5b，则气体从孔5a和5b分散到空气中，并且不进入电子电路6所在的壳体7的内部。另外，也可以仅添加形成孔5a-5d的工序，防止制造成本大幅增加。

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