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1. 发明专利

DE69329744T3 未知
公开(公告)号：DE69329744T3
公开(公告)日：2004-04-29
申请号：DE69329744
申请日：1993-09-16
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： IGARASHI SHINYA , HIRAYAMA HIROSHI , KOBAYASHI CHIHIRO , TSUTSUI MITSUKUNI , KATO YUKIO
IPC分类号： F02D45/00 , G01F1/68 , G01F1/684 , G01F5/00
摘要： An air flow rate measuring device for measuring intake air flow rate in an automotive engine, improved to reduce any error attributable to variation in the configurations of air cleaner and/or duct forming air passage upstream of the flow rate measuring device, thus offering high accuracy of the flow rate measurement. In one aspect of the invention, the inlet opening of a sub-air passage is disposed to contain the axis of a main air passage, while the outlet opening of the sub-air passage is disposed in the vicinity of a wall defining the main air passage. In order to cause a local reduction of the pressure of the principal of the air flow at the outlet opening, a protrusion or a flat surface which causes impediment to the flow if air in the main air passage is provided immediately upstream of the outlet opening. In another aspect, the inlet surface in which the inlet of the sub-air passage opens is stepped in the direction of flow of the air so as to enable air to be introduced into air flow rate measuring portion in the sub-air passage from different regions in the main air passage while giving a preselected order of preference to these different regions.

2. 发明专利

DE69329744T2 未知
公开(公告)号：DE69329744T2
公开(公告)日：2001-05-23
申请号：DE69329744
申请日：1993-09-16
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： IGARASHI SHINYA , HIRAYAMA HIROSHI , KOBAYASHI CHIHIRO , TSUTSUI MITSUKUNI , KATO YUKIO
IPC分类号： F02D45/00 , G01F1/68 , G01F1/684 , G01F5/00
摘要： An air flow rate measuring device for measuring intake air flow rate in an automotive engine, improved to reduce any error attributable to variation in the configurations of air cleaner and/or duct forming air passage upstream of the flow rate measuring device, thus offering high accuracy of the flow rate measurement. In one aspect of the invention, the inlet opening of a sub-air passage is disposed to contain the axis of a main air passage, while the outlet opening of the sub-air passage is disposed in the vicinity of a wall defining the main air passage. In order to cause a local reduction of the pressure of the principal of the air flow at the outlet opening, a protrusion or a flat surface which causes impediment to the flow if air in the main air passage is provided immediately upstream of the outlet opening. In another aspect, the inlet surface in which the inlet of the sub-air passage opens is stepped in the direction of flow of the air so as to enable air to be introduced into air flow rate measuring portion in the sub-air passage from different regions in the main air passage while giving a preselected order of preference to these different regions.

3. 发明专利

DE69329744D1 未知
公开(公告)号：DE69329744D1
公开(公告)日：2001-01-18
申请号：DE69329744
申请日：1993-09-16
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： IGARASHI SHINYA , HIRAYAMA HIROSHI , KOBAYASHI CHIHIRO , TSUTSUI MITSUKUNI , KATO YUKIO
IPC分类号： F02D45/00 , G01F1/68 , G01F1/684 , G01F5/00
摘要： An air flow rate measuring device for measuring intake air flow rate in an automotive engine, improved to reduce any error attributable to variation in the configurations of air cleaner and/or duct forming air passage upstream of the flow rate measuring device, thus offering high accuracy of the flow rate measurement. In one aspect of the invention, the inlet opening of a sub-air passage is disposed to contain the axis of a main air passage, while the outlet opening of the sub-air passage is disposed in the vicinity of a wall defining the main air passage. In order to cause a local reduction of the pressure of the principal of the air flow at the outlet opening, a protrusion or a flat surface which causes impediment to the flow if air in the main air passage is provided immediately upstream of the outlet opening. In another aspect, the inlet surface in which the inlet of the sub-air passage opens is stepped in the direction of flow of the air so as to enable air to be introduced into air flow rate measuring portion in the sub-air passage from different regions in the main air passage while giving a preselected order of preference to these different regions.

4. 发明专利

JP2000180235A AIR FLOW RATE MEASURING DEVICE 失效
公开(公告)号：JP2000180235A
公开(公告)日：2000-06-30
申请号：JP2000027320
申请日：2000-01-31
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： IGARASHI SHINYA , HIRAYAMA HIROSHI , KOBAYASHI CHIHIRO , TSUTSUI MITSUKUNI , KATO YUKIO
IPC分类号： G01F1/00 , F02D35/00 , F02D41/18 , G01F1/68 , G01F1/684
摘要： PROBLEM TO BE SOLVED: To sufficiently maintain measuring accuracy even against various changes of the upper stream form by masking the opening part of a sub-air-passage introducing a part of air flowing in an air passage on the upper stream of a flow rate detecting part. SOLUTION: The body 3 of this air flow meter is integratedly formed with a main air passage 5, a bridge body 2 bridge-likely traversing the main air passage 5, and a sub-air-passage 4 provided with a heating resistor 7 detecting an air flow rate and a temperature sensing resistor 8 detecting suction air temperature therein, and the heating resistor 7 and the temperature sensing resistor 8 are electrically connected to a module 9 housing a drive circuit through a supporting member. The sub-air- passage 4 is constituted of a longitudinal passage in parallel with the main air passage 5 having a sub-air-passage inlet 4a, and a lateral passage bending at right angle at the lower stream of a flow rate detecting part arranging the heating resistor 7 and extending to an outlet confluent part. Hereby, because air can be taken in the flow rate detecting part of the sub-air-passage 4 while regulating priority from the respective parts of the vertical section to the main flow of the main air passage 5, the output is not affected from the form of the upper stream of the flow rate detecting part.

5. 发明专利

JPH116750A AIR FLOW RATE MEASURING DEVICE 失效
公开(公告)号：JPH116750A
公开(公告)日：1999-01-12
申请号：JP16467598
申请日：1998-06-12
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： IGARASHI SHINYA , HIRAYAMA HIROSHI , KOBAYASHI CHIHIRO , TSUTSUI MITSUKUNI , KATO YUKIO
IPC分类号： G01F1/68 , G01F1/684
摘要： PROBLEM TO BE SOLVED: To enable air flow rate measurement with high precision by a method wherein a position and a size of an inlet opening face and an outlet conflux part of a sub-air passage and a protrusion shape of an upstream of an outlet conflux part are optimized. SOLUTION: On both sides of a bridge body 2 on an upstream side of an outlet conflux part of a sub-air passage 4, a protrusion 1 is formed. As a flow velocity of an upstream of an outlet of the sub-air passage is increased by the protrusion 1, an outlet part of the sub-air passage 4 acts so that an air flow rate of the sub-air passage is increased. Accordingly, with respect to a drift having a mountain-like flow velocity distribution in an air flowing into an air flow rate measuring device, a flow velocity at near a wall face of a main air passage 5 is slow in a mountain-like flow velocity distribution compared with the case of a uniform flow. Therefore, since separation is small and a pressure depression at a sub-air passage outlet is smaller than the uniform flow, an air flow of the sub-air passage 4 acts to a decreasing direction. Therefore, a sub-air passage inlet 4a has a shape which takes in a flow containing a center of the main air passage 5 and an output increase of the air flow rate measuring device caused by the shape is made possible to be reduced.

6. 发明专利

JP2004037131A Equipment for measuring gas flow rate 有权
标题翻译：用于测量气体流量的设备
公开(公告)号：JP2004037131A
公开(公告)日：2004-02-05
申请号：JP2002191580
申请日：2002-07-01
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： KATO YUKIO , ONIKAWA HIROSHI , IGARASHI SHINYA , TAKASAGO AKIRA
IPC分类号： G01F1/00 , F02D35/00 , G01F1/684 , G01F5/00 , G01F15/12
CPC分类号： G01F5/00 , G01F1/6842 , G01F15/12
摘要： PROBLEM TO BE SOLVED: To obtain equipment for measuring the gas flow rate in a suction passage for sucking gas in which abnormal output, aging, contamination and damage of a flow rate measuring element due to liquid and foreign matter existing in the sucked gas are reduced. SOLUTION: The gas flow rate measuring equipment having a flow rate detecting element located in the suction passage for sucking gas and detecting the gas flow rate comprises a subchannel for taking in the gas flowing through the suction passage, a subchannel inlet part opening toward the upstream side in the main flow direction of gas in the suction passage, and the flow rate detecting element located in the subchannel. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：获得用于吸入由于吸入的液体和异物引起的流量测量元件的异常输出，老化，污染和损坏的吸入气体的气体流量的测量装置气体减少。解决方案：具有位于用于吸入气体的吸入通道中的流量检测元件并检测气体流量的气体流量测量设备包括用于吸入流过吸入通道的气体的子通道，子通道入口部分开口朝向吸入通道中的气体的主流动方向的上游侧和位于子通道中的流量检测元件。版权所有（C）2004，JPO

7. 发明专利

DE3016074A1 未知
公开(公告)号：DE3016074A1
公开(公告)日：1980-11-13
申请号：DE3016074
申请日：1980-04-25
申请人： HITACHI LTD
发明人： HOTTA ATSUO , KATO YUKIO
IPC分类号： G11C11/411 , G11C11/416 , H03K3/286 , G11C11/24 , G11C5/00
摘要： An emitter junction type bipolar memory cell circuit having clamp diodes connected in parallel to collector resistances. The collector resistances are set to produce a potential difference of greater than 0.6 V or so caused by the stationary current. By so doing, it is possible to exclude any mal-function attributable to noises in the writing operation of the memory circuit.

8. 发明专利

DE3032620A1 未知
公开(公告)号：DE3032620A1
公开(公告)日：1981-03-19
申请号：DE3032620
申请日：1980-08-29
申请人： HITACHI LTD
发明人： HOTTA ATSUO , KATO YUKIO , ISOBE TERUO
IPC分类号： G11C7/22 , G11C11/34 , G11C11/407 , G11C11/414 , G11C8/00 , G11C29/00
摘要： A bipolar memory circuit is provided with a delay circuit which receives a write enabling signal, a gate circuit which detects the coincidence between an input signal and an output signal of the delay circuit, and a circuit which is started by an output signal of the gate circuit and which provides a pulse signal of a fixed time. The operation of a write driver circuit in the bipolar memory circuit is controlled by the pulse signal. Noise interfering in the write enabling signal are neglected by the use of the delay circuit and the gate circuit. The pulse width of the write enabling signal is permitted to be made smaller than the pulse width of the pulse signal required by the write driver circuit.

9. 发明专利

DE3023851A1 未知
公开(公告)号：DE3023851A1
公开(公告)日：1981-01-22
申请号：DE3023851
申请日：1980-06-25
申请人： HITACHI LTD
发明人： KATO YUKIO , HOTTA ATSUO , ISOBE TERUO
IPC分类号： H01L21/74 , G11C11/411 , G11C11/414 , H01L21/316 , H01L21/331 , H01L21/822 , H01L21/8229 , H01L27/04 , H01L27/07 , H01L27/102 , H01L29/73 , G11C11/40 , G11C7/00
摘要： The invention relates to an improvement in a semiconductor memory device including flip-flop type memory cells, each memory cell consisting of a pair of cross-coupled multi-emitter transistors. The semiconductor memory device of the invention is characterized by including a capacitance added between the collector region and the base region of each of the transistor pair of each memory cell in order to prevent the memory cell from erroneously operating due to alpha -rays.

10. 发明专利

DE2901538A1 未知
公开(公告)号：DE2901538A1
公开(公告)日：1979-07-26
申请号：DE2901538
申请日：1979-01-16
申请人： HITACHI LTD
发明人： HOTTA ATSUO , KATO YUKIO
IPC分类号： G11C11/411 , H01L21/331 , H01L21/822 , H01L21/8222 , H01L21/8229 , H01L27/04 , H01L27/082 , H01L27/10 , H01L27/102 , H01L29/73 , G11C11/40 , G11C7/00
摘要： Disclosed is a memory cell circuit including a pair of memory transistors having respective collectors and bases cross-coupled to each other, wherein load means connected to the collector of each one of said memory transistors comprises a parallel circuit of a load resistance and a transistor whose emitter and collector are connected to both ends of the load resistance and whose base is connected to the collector of the other of the memory transistors, thereby causing the readout currents of the memory cell circuit to be greater irrespective of increased load resistances.

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