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1. 发明公开

EP2045584A3 Thermal flow meter control method 有权
标题翻译：用于热式流量计的控制方法
公开(公告)号：EP2045584A3
公开(公告)日：2014-04-16
申请号：EP08017400.6
申请日：2008-10-02
申请人： Hitachi Ltd.
发明人： Sukegawa, Yoshihiro , Tokuyasu, Noboru , Hoshika, Hiroaki , Kashio, Kaori
IPC分类号： G01F1/684 , G01F1/698
CPC分类号： G01F1/684 , G01F1/698 , G01F1/74 , G01F15/02 , G01F15/04
摘要： A thermal flow meter corrects flow rate detection errors produced by vaporization of liquid phase components included in a gas to be measured. The thermal flow meter includes a correction circuit 500 that applies respectively different predetermined voltages to heating resistors consisting of first heating resistor Rh1 and second heating resistor Rh2 of a sensor element disposed in the gas to be measured to set a first temperature state and a second temperature state, calculates a first flow rate value Q1 of the gas to be measured in the first temperature state and a second flow rate value Q2 of the gas to be measured in the second temperature state, and calculates a flow rate correction value ΔQ based on a ratio (Q1/Q2) between the first flow rate value and second flow rate value or a fourth-power value (Q1/Q2) 4 of the ratio to correct a flow rate of the gas to be measured.

2. 发明授权

EP1914415B1 Control apparatus of egr control valve 有权
标题翻译：一EGR控制阀的控制装置
公开(公告)号：EP1914415B1
公开(公告)日：2016-07-06
申请号：EP07020426.8
申请日：2007-10-18
申请人： Hitachi, Ltd.
发明人： Ohata, Eiichiro , Yamaoka, Shiro , Sukegawa, Yoshihiro , Hoshika, Hiroaki , Kashio, Kaori
IPC分类号： F02M26/47
CPC分类号： F02D41/0055 , F02D41/0072 , F02D41/187 , F02D41/22 , F02D2041/0067 , F02D2041/0075 , F02D2200/0414 , F02M26/25 , F02M26/43 , F02M26/44 , F02M26/47 , F02M26/48 , F02M26/49 , F02M2026/003 , Y02T10/47

3. 发明公开

EP2065587A3 Engine control system and control method thereof 审中-公开
标题翻译：发动机控制系统及其控制方法
公开(公告)号：EP2065587A3
公开(公告)日：2011-10-19
申请号：EP08020808.5
申请日：2008-12-01
申请人： Hitachi Ltd.
发明人： Yamaoka, Shiro , Sukegawa, Yoshihiro , Tokuyasu, Noboru , Hoshika, Hiroaki , Kashio, Kaori
IPC分类号： F02D21/08 , F02D41/14 , F02D41/22
CPC分类号： F02D41/0002 , F02D41/0072 , F02D41/18 , F02D41/222 , F02D41/3035 , F02D41/3076 , F02D2041/0075 , F02D2200/0406 , F02D2400/08 , F02M26/05 , F02M26/06 , F02M26/28 , F02M26/47 , Y02T10/42 , Y02T10/47
摘要： An engine that re-circulates its exhaust gas suffers decreased accuracy in estimating an EGR rate real-time especially while the operating state of the engine 19 is in a transitional state, which often results in torque fluctuations and deteriorated exhaust gas.
A sensor 12 for directly detecting an EGR flow rate is disposed in an EGR path 9. An EGR rate and in-cylinder oxygen concentration are calculated from the output value of that sensor 12. In addition, when this EGR rate calculation method is used, the calculation is properly switched between a steady operation state characterized by a low load and small rotational fluctuations and a transitional operating state including the acceleration and deceleration. This makes it possible to correctly estimate the EGR rate and the in-cylinder oxygen concentration under a wide range of engine operation conditions, and thereby to avoid the fluctuation of torque and the deterioration of exhaust gas.

4. 发明公开

EP1835267A3 Thermal gas-flow measuring instrument 审中-公开
标题翻译：热式气体流量计
公开(公告)号：EP1835267A3
公开(公告)日：2010-12-01
申请号：EP07001343.8
申请日：2007-01-22
申请人： HITACHI, LTD.
发明人： Tokuyasu, Noboru , Terada, Daisuke , Kashio, Kaori , Otsuki, Toshiki , Fukatsu, Katsuaki , Onuki, Hiroshi , Kubo, Jun
IPC分类号： G01F1/684 , G01F1/69 , G01F1/698
CPC分类号： G01F1/6842 , G01F1/69 , G01F1/698
摘要： To realize a thermal gas-flow measuring instrument which can suppress the influence of pollution of a support of heating resistor on the output characteristics independent of the use environment. The first heating resistor (21) is placed in the gas to be measured. The temperature sensing resistor (24) which is positioned at upstream side or downstream side of the first heating resistor (21) generates signals relating to the flow rate. Between the first heating resistor (21) and the support (6) for supporting the first heating resistor (21), the second heating resistor (22) is positioned in a state of electrically insulated from the first heating resistor (21). The second heating resistor (22) suppresses the heat being transferred from the first heating resistor (21) to the support (2). The control circuit (31) controls the temperatures of the first heating resistor (21) and the second heating resistor (22) so as the operational temperature range of the second heating resistor (22) or the temperature range at the joint section between the first heating resistor (21) and the second heating resistor (22) to become at or above the temperature at which the water droplet evaporates to disappear by the film boiling.

5. 发明公开

EP2072973A1 Fluid flow rate measurement apparatus 有权
标题翻译： Durchflussmessvorrichtung
公开(公告)号：EP2072973A1
公开(公告)日：2009-06-24
申请号：EP08021635.1
申请日：2008-12-12
申请人： Hitachi Ltd.
发明人： Hoshika, Hiroaki , Tokuyasu, Noboru , Kokubu, Takanori , Kashio, Kaori
IPC分类号： G01F1/68
CPC分类号： G01F1/6842 , G01F1/692
摘要： Disclosed herein is a fluid flow rate measurement apparatus which prevents accumulation of pollutional substances in a sub-passage to enable high-accuracy fluid flow rate measurement.
A heater pattern 34 is formed on the surface of a cylindrical rod 3. When electricity is conducted in the heater pattern 34 and heat is generated, the heat is transmitted to the sub-passage 26 through an insulating layer. The heat is gradually transmitted up to the leading end of the sub-passage 26, and burns out pollutional substances adhering to the sub-passage 26. In this way, accumulation in the sub-passage 26 of pollutional substances can be prevented, thus attaining a fluid flow rate measurement apparatus that enables high-accuracy fluid flow rate measurement.
摘要翻译：本文公开了一种流体流量测量装置，其防止污染物质在子通道中积聚，以实现高精度流体流量测量。在圆柱形杆3的表面上形成加热器图案34.当在加热器图案34中传导电力并产生热量时，热量通过绝缘层传递到子通道26。热量逐渐传递到子通道26的前端，并且燃烧附着在副通道26上的污染物质。这样就可以防止污染物质的副通道26中的积聚，从而达到能够进行高精度流体流量测量的流体流量测量装置。

6. 发明公开

EP2065587A2 Engine control system and control method thereof 审中-公开
标题翻译：汽车系统与Steuerungsverfahrendafür
公开(公告)号：EP2065587A2
公开(公告)日：2009-06-03
申请号：EP08020808.5
申请日：2008-12-01
申请人： Hitachi Ltd. and Hitachi-LG Data Storage, Inc.
发明人： Yamaoka, Shiro , Sukegawa, Yoshihiro , Tokuyasu, Noboru , Hoshika, Hiroaki , Kashio, Kaori
IPC分类号： F02D21/08 , F02D41/14 , F02D41/22
CPC分类号： F02D41/0002 , F02D41/0072 , F02D41/18 , F02D41/222 , F02D41/3035 , F02D41/3076 , F02D2041/0075 , F02D2200/0406 , F02D2400/08 , F02M26/05 , F02M26/06 , F02M26/28 , F02M26/47 , Y02T10/42 , Y02T10/47
摘要： An engine that re-circulates its exhaust gas suffers decreased accuracy in estimating an EGR rate real-time especially while the operating state of the engine 19 is in a transitional state, which often results in torque fluctuations and deteriorated exhaust gas.
A sensor 12 for directly detecting an EGR flow rate is disposed in an EGR path 9. An EGR rate and in-cylinder oxygen concentration are calculated from the output value of that sensor 12. In addition, when this EGR rate calculation method is used, the calculation is properly switched between a steady operation state characterized by a low load and small rotational fluctuations and a transitional operating state including the acceleration and deceleration. This makes it possible to correctly estimate the EGR rate and the in-cylinder oxygen concentration under a wide range of engine operation conditions, and thereby to avoid the fluctuation of torque and the deterioration of exhaust gas.
摘要翻译：特别是在发动机19的运转状态处于过渡状态时，特别是在经常导致转矩波动和废气劣化的情况下，再次循环排气的发动机的EGR率实时估计的精度降低。用于直接检测EGR流量的传感器12设置在EGR通路9中。根据该传感器12的输出值计算EGR率和缸内氧浓度。此外，当使用该EGR率计算方法时，该计算在由低负载和小的旋转波动表征的稳定运行状态和包括加速和减速的过渡运行状态下适当地切换。由此，能够在大范围的发动机运转条件下正确地估计EGR率和缸内氧浓度，能够避免转矩波动和排气恶化。

7. 发明公开

EP2058633A1 Thermal type flow sensor 有权
公开(公告)号：EP2058633A1
公开(公告)日：2009-05-13
申请号：EP09001884.7
申请日：2007-04-12
申请人： Hitachi Ltd.
发明人： Sukegawa, Yoshihiro , Tokuyasu, Noboru , Kashio, Kaori , Terada, Daisuke
IPC分类号： G01F1/69 , G01F1/692 , G01F1/699 , G01F1/696
CPC分类号： G01F1/69 , G01F1/692 , G01F1/696 , G01F1/6983 , G01F1/699
摘要： The invention relates to a flow rate measuring element (1) of a thermal type flow sensor is placed in the fluid to be measured. The element includes: a first heating resistor (7) for measuring a flow rate; a second heating resistor (10) for heating a support (5) for the first heating resistor (7); and current control circuits (101, 102) and which control heating resistor supply current so that the temperature of the second heating resistor (10) is higher than the temperature of the first heating resistor (7).

8. 发明公开

EP2045584A2 Thermal flow meter control method 有权
标题翻译： Steuerverfahrenfüreinen thermischen Durchflussmesser
公开(公告)号：EP2045584A2
公开(公告)日：2009-04-08
申请号：EP08017400.6
申请日：2008-10-02
申请人： Hitachi Ltd.
发明人： Sukegawa, Yoshihiro , Tokuyasu, Noboru , Hoshika, Hiroaki , Kashio, Kaori
IPC分类号： G01F1/684 , G01F1/698
CPC分类号： G01F1/684 , G01F1/698 , G01F1/74 , G01F15/02 , G01F15/04
摘要： A thermal flow meter corrects flow rate detection errors produced by vaporization of liquid phase components included in a gas to be measured. The thermal flow meter includes a correction circuit 500 that applies respectively different predetermined voltages to heating resistors consisting of first heating resistor Rh1 and second heating resistor Rh2 of a sensor element disposed in the gas to be measured to set a first temperature state and a second temperature state, calculates a first flow rate value Q1 of the gas to be measured in the first temperature state and a second flow rate value Q2 of the gas to be measured in the second temperature state, and calculates a flow rate correction value ΔQ based on a ratio (Q1/Q2) between the first flow rate value and second flow rate value or a fourth-power value (Q1/Q2) 4 of the ratio to correct a flow rate of the gas to be measured.
摘要翻译：热流量计校正由待测气体中包含的液相成分汽化产生的流量检测误差。热流量计包括校正电路500，该校正电路500分别对设置在被测量气体中的传感器元件的第一加热电阻器Rh1和第二加热电阻器Rh2组成的加热电阻器施加不同的预定电压，以设定第一温度状态和第二温度状态，在第二温度状态下，计算第一温度状态下的被测量气体的第一流量值Q1和待测气体的第二流量值Q2，并计算出基于第一流量值和第二流量值之间的比率（Q1 / Q2）或校正要测量的气体的流量的比率的第四功率值（Q1 / Q2）4。

9. 发明授权

EP1845345B1 Thermal type flow sensor 有权
公开(公告)号：EP1845345B1
公开(公告)日：2016-11-02
申请号：EP07007526.2
申请日：2007-04-12
申请人： Hitachi, Ltd.
发明人： Sukegawa, Yoshihiro , Tokuyasu, Noboru , Kashio, Kaori , Terada, Daisuke
IPC分类号： G01F1/698 , G01F1/69 , G01F1/692 , G01F1/699 , G01F1/696
CPC分类号： G01F1/69 , G01F1/692 , G01F1/696 , G01F1/6983 , G01F1/699

10. 发明公开

EP1914415A3 Control apparatus of egr control valve 有权
标题翻译：一EGR控制阀的控制装置
公开(公告)号：EP1914415A3
公开(公告)日：2014-09-10
申请号：EP07020426.8
申请日：2007-10-18
申请人： Hitachi, Ltd.
发明人： Ohata, Eiichiro , Yamaoka, Shiro , Sukegawa, Yoshihiro , Hoshika, Hiroaki , Kashio, Kaori
IPC分类号： F02M25/07 , F02D41/22
CPC分类号： F02D41/0055 , F02D41/0072 , F02D41/187 , F02D41/22 , F02D2041/0067 , F02D2041/0075 , F02D2200/0414 , F02M26/25 , F02M26/43 , F02M26/44 , F02M26/47 , F02M26/48 , F02M26/49 , F02M2026/003 , Y02T10/47
摘要： A conventional technique performs valve close control of an EGR valve after an EGR-gas back flow is detected. Therefore, the conventional technique has a subject that, if an EGR-gas flow direction changes from forward flow to back flow, a back flow condition will last not only for a response delay time of a detector but also for the judgment time by calculation processing and the actuation time of the EGR control valve. There is provided a control apparatus of an EGR control valve 11, comprising: an EGR control valve 11 which is provided in an exhaust gas recirculation passage to circulate exhaust gas of an combustion engine 19 from an exhaust gas passage 92 to an intake air passage; measurement means for measuring a flow rate of EGR gas flowing in the exhaust gas recirculation passage; and control means for receiving an input from the measurement means and closing the EGR control valve 11 if the EGR-gas flow rate is smaller than a predetermined threshold value when the EGR gas is flowing from the exhaust side to the intake side of the internal combustion engine 19.

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