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1. 发明专利

JPH08327422A MEASURING APPARATUS OF AIR FLOW RATE 失效
公开(公告)号：JPH08327422A
公开(公告)日：1996-12-13
申请号：JP13140895
申请日：1995-05-30
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： KADOHIRO TAKASHI , IGARASHI SHINYA , ABE HIROYUKI
IPC分类号： G01P5/12 , F02D35/00 , G01F1/68 , G01F1/684 , G01P5/10
摘要： PURPOSE: To obtain a measuring apparatus by which a pressure loss is reduced and whose measuring accuracy is enhanced by a method wherein the transverse width of a support part as the coupling part of a body to a subpassage is made smaller than the transverse width of a part constituting an entrance face in the subpassage. CONSTITUTION: The intake air 9 is supplied to an engine through a main passage 2 and a subpassage 3 which are constituted inside a body 1. A heat-generating resistor 4 and a temperature-sensing resistor 5 which are installed inside the passage 3 are connected electrically to support pins 6 inside a holder part 7, and they are connected to a drive circuit 10 via lead wires 8. On the basis of output signals of the resistors 4, 5, the circuit 10 outputs a signal related to an air flow rate. A member 17 which constitutes the passage 3 is mounted on a module part 18 on which the circuit 10 is installed, and the module part 18 is inserted from a hole in the body 1 so as to be installed at the outer wall part of the body 1. At this time, the transverse width of the holder part 7 is constituted to be smaller than the transverse width of a member constituting an entrance part in the passage 3, and a pressure loss is reduced. In addition, since the quantity of a member covering the support pins 6 is reduced, a wall temperature characteristic is enhanced.

2. 发明专利

JPH08327423A MEASURING APPARATUS OF AIR FLOW RATE 失效
公开(公告)号：JPH08327423A
公开(公告)日：1996-12-13
申请号：JP13316995
申请日：1995-05-31
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： KADOHIRO TAKASHI , TSUMAGARI MAMORU , IGARASHI SHINYA , KOBAYASHI CHIHIRO
IPC分类号： G01F1/68 , F02D41/18 , F02D45/00 , G01F1/684
摘要： PURPOSE: To obtain a measuring apparatus which prevents a subpassage constituent member from falling and whose safety is enhanced by a method wherein a stopper for fall prevention of the subpassage constituent member is installed in an insertion hole at a circuit module part which is installed at a part of a body. CONSTITUTION: The intake air is supplied to an engine through a main passage 2 and a subpassage 3 which are constituted inside a body 1. A heat-generating resistor 4 and a temperature-sensing resistor 5 at the inside of the passage 3 are connected to an electronic circuit 9 via support pins 6 and lead wires 8. On the basis of signals from the resistors 4, 5, the circuit 9 outputs a signal related to an air inflow rate. An insertion hole 19, which is made in the body, at a circuit module part 18 to which a subpassage constituent member 7 is bonded is formed to be a size through which the member 7 can be inserted. A stopper 11 for fall prevention of the member 7 is installed at a part of the insertion hole 19. It does not interfere when the member 7 is inserted. When the member 7 falls, the stopper acts in such a way that the bonding face of the member 7 to the module part 18 does not come off. Thereby, even when the member 7 comes off, it is possible to prevent the member 7 from falling into the passage 2 or the engine.

3. 发明专利

JPH08297040A AIR FLOW RATE MEASURING APPARATUS 失效
公开(公告)号：JPH08297040A
公开(公告)日：1996-11-12
申请号：JP10341295
申请日：1995-04-27
申请人： HITACHI LTD , HITACHI AUTOMOTIVE ENG
发明人： KADOHIRO TAKASHI , SUZUKI TADAO , TSUMAGARI MAMORU , IGARASHI SHINYA , SAITO TAKAYUKI
IPC分类号： G01F1/68 , F02D35/00 , G01F1/684 , G01K7/18
摘要： PURPOSE: To obtain a highly reliable air flow rate measuring apparatus. CONSTITUTION: The flow rate measuring apparatus comprises a main channel 2 and a sub-channel 3 for passing suction air, a heating element 4 and a temperature-sensing resistance element 5 arranged in the sub-channel 3 in order to measure the flow rate of air, and a circuit module part 10 equipped with a suction air temperature detection element and the compositional member of sub-channel 3, wherein the compositional member of sub-channel is provided with a member for protecting the suction air temperature detection element. With such structure, the highly reliable air flow rate measuring apparatus can be obtained.

4. 发明专利

JP2006316708A Engine control device 审中-公开
标题翻译：发动机控制装置
公开(公告)号：JP2006316708A
公开(公告)日：2006-11-24
申请号：JP2005140559
申请日：2005-05-13
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： YAMAOKA SHIRO , SUKEGAWA YOSHIHIRO , TOKUYASU NOBORU , IGARASHI SHINYA , FUKATSU KATSUAKI , KADOHIRO TAKASHI , IWAKI HIDEFUMI , ICHIHARA TAKANOBU
IPC分类号： F02D45/00 , F02D21/08 , F02D41/04 , F02D43/00 , F02M25/07
CPC分类号： F02D41/307 , F02D41/0007 , F02D41/0072 , F02D41/107 , F02D41/1456 , F02D41/18 , F02D41/222 , F02D41/3035 , F02D41/3076 , F02D2041/0075 , F02D2200/501 , F02D2200/602 , F02D2250/28 , F02M26/05 , F02M26/47 , Y02T10/47
摘要： PROBLEM TO BE SOLVED: To solve a problem in an engine having a premixed combustion mode that estimation accuracy of an EGR flow rate is deteriorated in transition and torque variations and emission deterioration are caused. SOLUTION: An engine control device has the premixed combustion mode and a diffusion combustion mode, has a sensor disposed in an EGR flow passage of the engine for detecting the EGR flow rate, and estimates the cylinder condition of the engine in the premixed combustion mode of the engine by using an output value of the sensor detecting the EGR flow rate. The EGR flow rate in transition can be accurately detected and this can be fed back highly responsively so that the torque variations and the emission deterioration can be prevented. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：解决的问题：为了解决在具有过渡期间EGR流量的估计精度劣化，转矩变动和排放恶化的预混燃烧模式的发动机中的问题。解决方案：发动机控制装置具有预混合燃烧模式和扩散燃烧模式，传感器设置在用于检测EGR流量的发动机的EGR流路中，并且在预混合中估计发动机的气缸状况通过使用检测EGR流量的传感器的输出值进行发动机的燃烧模式。可以精确地检测转换中的EGR流量，并且能够高度响应地反馈，从而可以防止扭矩变化和排放恶化。版权所有（C）2007，JPO＆INPIT

5. 发明专利

JP2005264771A Engine control system using air flow rate measuring device 审中-公开
标题翻译：使用空气流量测量装置的发动机控制系统
公开(公告)号：JP2005264771A
公开(公告)日：2005-09-29
申请号：JP2004075510
申请日：2004-03-17
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KADOHIRO TAKASHI , KAWASAKI TSUTOMU , ONIKAWA HIROSHI
IPC分类号： F02D45/00 , F02D21/08
摘要： PROBLEM TO BE SOLVED: To reduce the error of an air flow rate measuring device caused by the pulsation of an engine.
SOLUTION: In a system having an EGR system for returning exhaust gases to an intake system, the generated amounts of the pulsation of the engine and a reverse flow are largely changed by the return amount of EGR to the intake system. Since the effect of the pulsation of the engine on the air flow rate measuring device causes an approximately same error under specified conditions (engine rotational speed and EGR return amount), the error of the air flow rate measuring device by the pulsation of the engine can be corrected by a correction table using the rotational speed of the engine and the EGR amount to more accurately control the engine. Since the effect of the pulsation of the engine varied by the return amount of the EGR can be reduced, a highly accurate control can be performed in a diesel engine vehicle having particularly a very large return amount of EGR and having no throttle valve.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：减少由发动机的脉动引起的空气流量测量装置的误差。解决方案：在具有用于将废气返回到进气系统的EGR系统的系统中，所产生的发动机的脉动量和逆流的产生量大大地改变到进气系统的EGR返回量。由于发动机的脉动对空气流量测量装置的影响在规定条件（发动机转速和EGR返回量）下引起大致相同的误差，所以通过发动机的脉动使空气流量测量装置的误差可以通过使用发动机的转速和EGR量的校正表来校正，以更精确地控制发动机。由于可以减少发动机的脉动的影响，所以可以减少EGR的返回量，从而能够在具有非常大的回流量的EGR并且没有节流阀的柴油发动机车辆中进行高精度的控制。版权所有（C）2005，JPO＆NCIPI

6. 发明专利

JPH11201798A AIR FLOW RATE MEASURING DEVICE 失效
公开(公告)号：JPH11201798A
公开(公告)日：1999-07-30
申请号：JP725198
申请日：1998-01-19
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： TSUMAGARI MAMORU , KADOHIRO TAKASHI
IPC分类号： G01F15/14 , F02D35/00 , F02M35/10 , G01F1/68 , G01F1/684
摘要： PROBLEM TO BE SOLVED: To mount a cover on a body without using screws by providing a post-fitting metallic cover to cover an approximately whole area of a module, and electrically conducting the cover with a metallic base of a module part. SOLUTION: The radio interference resistance can be greatly improved by installing a metallic cover 101 on an approximately whole area of an upper part of a module 20. The cover 101 can be recycled after the service life as a product is over by installing the cover 101 on an upper (external) part of the module 20. A stopper part (a) and a stopper part (b) are installed on the cover 101, the metallic cover is integrated with the module by the stopper (a), and then, fixed to the body by the stopper (b). Any screws need not be used in mounting the cover on the body, and the man-hour can be greatly reduced. The stopper (a) can be electrically conducted with the metallic base of the module, and is effective in stably improving the radio interference resistance.

7. 发明专利

JPH1123334A HEATING RESISTOR TYPE APPARATUS FOR MEASURING AIR FLOW RATE AND METHOD AND APPARATUS FOR CORRECTING MEASUREMENT ERROR THEREOF 失效
公开(公告)号：JPH1123334A
公开(公告)日：1999-01-29
申请号：JP18206597
申请日：1997-07-08
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： KOBAYASHI CHIHIRO , IGARASHI SHINYA , KADOHIRO TAKASHI
IPC分类号： G01F1/68 , G01F1/698 , G01F15/04
摘要： PROBLEM TO BE SOLVED: To correct measurement errors to a temperature change in a wide range by measuring a temperature of sucked air, and correcting a flow rate dependency of an output temperature characteristic with the use of a temperature signal to offset errors. SOLUTION: A suction air temperature Ta is measured by a suction air temperature sensor 157 set at an intake duct 158 and sent to an engine control unit(ECU) 100. A flow rate of the suction air flowing in an intake pipe is measured by a heat- generating resistance body 3. An output of the heat-generating resistance body is sent as a voltage V0 to the ECU 100 from a module 161. At this time, a V0D converted to a digital signal at an A/D converter 170 is converted to the air flow rate by a converter circuit 171 and integrated at an integrator 172. Then, a revolution number Ne of an engine is taken into the ECU 100 and an air flow rate Qa per one cylinder is calculated at an operator 173. A measurement error of an air flow rate-measuring apparatus due to a temperature change is corrected in a processing apparatus 174 with the use of the air flow rate Qa and suction air temperature Ta, whereby an injector jet signal tp is output.

8. 发明专利

JPH09236465A HEATING RESISTANCE-TYPE MEASURING APPARATUS FOR FLOW RATE OF AIR 失效
公开(公告)号：JPH09236465A
公开(公告)日：1997-09-09
申请号：JP4445496
申请日：1996-03-01
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： IGARASHI SHINYA , KOBAYASHI CHIHIRO , KADOHIRO TAKASHI
IPC分类号： G01P5/12 , G01F1/68 , G01F1/692
摘要： PROBLEM TO BE SOLVED: To obtain a heating resistance-type measuring apparatus in which the flow of a resistor arrangement part on the downstream is changed into a turbulent flow by a method wherein a tripping wire is installed on the upstream of a flat face on which a thermosensitive resistor is arranged or a protrusion which is higher than the surface of the resistor is installed so as to have the same function as the tripping wire. SOLUTION: An element plate 1 is formed of an electric insulating material such as a ceramic or the like whose thermal conductivity is large, and a thermosensitive resistor pattern 2 which is composed of a platinum thin film or the like and an electrode pattern 4 which is connected to a drive circuit are formed on the surface. A tripping wire 3 is arranged on the element plate 1 by a bonding operation or the like in the same length as the pattern 2 in a transverse flow shape at an edge in a direction nearly perpendicular to the flow direction 5 of the air. The tripping wire 3 is formed of a thick member (in a thick wire diameter) with reference to the thickness of the pattern 2, and a structure is formed in such a way that a flow inside a boundary layer is changed into a turbulent flow in a very short approach run section on its downstream.

9. 发明专利

JPH09145484A INTAKE AIR TEMPERATURE SENSOR 失效
公开(公告)号：JPH09145484A
公开(公告)日：1997-06-06
申请号：JP30094195
申请日：1995-11-20
申请人： HITACHI LTD , HITACHI CAR ENG CO LTD
发明人： KADOHIRO TAKASHI , TSUMAGARI MAMORU , IGARASHI SHINYA
IPC分类号： G01F1/68 , F02D35/00 , G01F1/684 , G01F1/69 , G01K1/14 , G01K7/16 , G01K13/02
摘要： PROBLEM TO BE SOLVED: To minimize the effect of a leak by forming a temperature-sensitive resistor exposed from a holder section and conductors into a structure preventing the infiltration of a liquid when tilted, and providing a counterbore between a pair of conductors of the holder section. SOLUTION: An insertion hole 3 is provided on a body 2 constituting an air passage 1, a temperature-sensitive resistor 4 and a connector section 5 are connected by support pins 6, 6, and the pins 6, 6 are held by a holder section 7. A counterbore 201 is provided at the position of the holder section 7 corresponding to the middle sections of the pins 6, 6, and the creepage distance of the holder section 7 between the pins 6, 6 is extended from the distance 202 to the distance 203. The surface resistance value in parallel with the resistor 4 is increased even when water is stuck, and the effect on the output characteristic of the resistor 4 is reduced. When the counterbore 201 is installed, the occurrence of voids is prevented when the holder section 7 is molded, and an internal leak is prevented. It is effective to form the counterbore 201 to the depth of about 5mm or above from the end face. Temperature can be detected more accurately.

10. 发明专利

JP2006317297A Method for diagnosing degradation of thermal flowmeter and output correction method 审中-公开
标题翻译：用于诊断热流量计和输出校正方法的方法
公开(公告)号：JP2006317297A
公开(公告)日：2006-11-24
申请号：JP2005140558
申请日：2005-05-13
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： TOKUYASU NOBORU , IGARASHI SHINYA , FUKATSU KATSUAKI , KADOHIRO TAKASHI , IWAKI HIDEFUMI , SUKEGAWA YOSHIHIRO , YAMAOKA SHIRO , ICHIHARA TAKANOBU
IPC分类号： G01F1/698 , F02M25/07 , G01F1/68
CPC分类号： Y02T10/121
摘要： PROBLEM TO BE SOLVED: To solve the problem that fouling and degradations simultaneously occur in a heating resistor etc. to cause a substantial degradation in accuracy in a short time since especially diesel exhaust gases contain a large amount of fouling components such as carbon and oil in the case of measuring the quantity of flow of exhaust gases. SOLUTION: A means for determining degradations of a flowmeter is provided for the inside of ECU or a flowmeter. Degradations of the flowmeter is determined by the degradation determination means before the engine is started or with an engine in a state of steady operation after it is started. Output of the flowmeter is corrected on the basis of determination results. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：解决问题：为了解决在加热电阻器等中同时发生的结垢和劣化的问题，在短时间内导致精度的显着劣化，特别是柴油废气中含有大量的污垢成分如碳在测量废气流量的情况下为油。
解决方案：为ECU或流量计内部提供了一种用于确定流量计劣化的装置。在发动机起动之前，由发动机起动之后的劣化判定装置，或者起动后的发动机处于稳定运行状态，来决定流量计的劣化。基于确定结果校正流量计的输出。版权所有（C）2007，JPO＆INPIT

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